Continuous ion exchange device for producing potassium phytate

Abstract

The invention discloses a continuous ion exchange device for producing potassium phytate, relates to the technical field of preparation of potassium phytate, and aims to solve the technical problem that an existing ion exchange device cannot stably operate for a long time due to the fact that resin is caked and hardened when the existing ion exchange device is used for preparing potassium phytate. The continuous ion exchange device comprises an adsorption area, an impurity removal area, an analysis area and a water top salt area which are communicated in sequence; the adsorption area comprises a solid suspension removal area, a first-stage adsorption area, a second-stage adsorption area, a loose resin area, a feeding tank and a slurry return tank; an outlet of the feeding tank is connected with an inlet pipeline of the first-stage adsorption area; an outlet of the first-stage adsorption area is respectively connected with an inlet of the second-stage adsorption area, an inlet of the loose resin area and an inlet pipeline of the solid suspension removal area; an outlet of the solid suspension removal area is connected with an inlet pipeline of the feeding tank; an outlet of the secondary adsorption area and an outlet of the loose resin area are connected with an inlet pipeline of the slurry return tank. The continuous ion exchange device is used for preparing potassium phytate.

Description

Technical Field

[0001] The invention relates to the technical field of potassium phytate preparation, in particular to a continuous ion exchange device for producing potassium phytate. Background Art

[0002] Continuous ion exchange technology can be used to separate, refine and recover specific effective substances or harmful substances in various industrial waters and other solutions. Continuous ion exchange systems can use traditional adsorbents such as ion exchange resins, activated carbon and synthetic adsorbents. Continuous ion exchange systems can operate continuously without the need to set up backup equipment, and normal production does not need to be interrupted when ion exchange resins are regenerated. Therefore, due to the characteristics of multi-column adsorption and continuous operation under stable conditions, continuous ion exchange systems can process materials with high impurity concentrations and obtain separation products with expected concentrations and components.

[0003] In the process of preparing potassium phytate from corn soaking water, the corn soaking water contains a large amount of suspended solids. After the suspended solids in the corn soaking water enter the resin column, the resin will clump and harden. The suspended solids in the corn soaking water are difficult to completely remove, so that the existing single column ion exchange and conventional continuous ion exchange devices cannot operate stably for a long time. Therefore, a new continuous ion exchange device is urgently needed to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a continuous ion exchange device for producing potassium phytate, which is used to solve the technical problem that resin agglomeration and hardening occur when the existing ion exchange device prepares potassium phytate, so that the ion exchange device cannot operate stably for a long time.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A continuous ion exchange device for producing potassium phytate, comprising an adsorption zone, an impurity removal zone, a decomposition zone and a water top salt zone which are connected in sequence;

[0007] The adsorption zone includes a solid suspension removal zone, a primary adsorption zone, a secondary adsorption zone, a loose resin zone, a feed tank and a reslurry tank, and each of the solid suspension removal zone, the primary adsorption zone, the secondary adsorption zone and the loose resin zone is provided with at least one adsorption column;

[0008] The outlet of the feed tank is connected to the inlet pipeline of the primary adsorption zone, and the outlet of the primary adsorption zone is respectively connected to the inlet pipelines of the secondary adsorption zone, the inlet of the loose resin zone and the inlet pipelines of the desuspension zone;

[0009] The outlet of the desuspension zone is connected to the inlet pipeline of the feed tank, and the outlet of the secondary adsorption zone and the outlet of the loose resin zone are both connected to the inlet pipeline of the reslurry tank.

[0010] Furthermore, in the continuous ion exchange device of the present invention, the impurity removal zone includes a backwash impurity removal zone, a forward wash impurity removal zone, a pure water tank, a water tank and a wash water tank, and the adsorption column of the backwash impurity removal zone comes from the solid suspension removal zone, and the adsorption column of the forward wash impurity removal zone comes from the backwash impurity removal zone;

[0011] Among them, the pure water tank outlet is connected to the inlet pipe of the forward washing and impurity removal area, and the outlet of the forward washing and impurity removal area is connected to the inlet pipe of the application water tank; the outlet of the application water tank is connected to the inlet pipe of the backwash and impurity removal area, and the outlet of the backwash and impurity removal area is respectively connected to the inlet of the washing water tank and the inlet pipe of the feed tank.

[0012] Furthermore, in the continuous ion exchange device of the present invention, the analysis zone includes a primary analysis zone, a secondary analysis zone, a primary analysis tank and a qualified analysis liquid tank, and the adsorption column of the secondary analysis zone comes from the positive washing and impurity removal zone, and the adsorption column of the primary analysis zone comes from the secondary analysis zone;

[0013] Among them, the outlet of the first-level analysis tank is connected to the inlet pipeline of the first-level analysis area, and the outlet of the first-level analysis area is connected to the inlet pipeline of the second-level analysis area; the outlet of the second-level analysis area is respectively connected to the inlet pipeline of the qualified analysis liquid tank and the application water tank.

[0014] Furthermore, in the continuous ion exchange device of the present invention, the water top salt zone includes a pure water top salt zone, a membrane permeate top salt zone, a salt tank and a membrane permeate tank, and the adsorption column of the membrane permeate top salt zone comes from the primary analysis zone, and the adsorption column of the pure water top salt zone comes from the membrane permeate top salt zone;

[0015] Wherein, the outlet of the pure water tank is connected to the inlet pipeline of the pure water top salt area, the outlet of the pure water top salt area is connected to the inlet pipeline of the salt tank, and the outlet of the salt tank is connected to the inlet pipeline of the primary analysis tank;

[0016] The outlet of the qualified analytical liquid tank is connected to the inlet pipeline of the membrane permeate liquid tank, the outlet of the membrane permeate liquid tank is connected to the inlet pipeline of the membrane permeate liquid top salt zone, and the outlet of the membrane permeate liquid top salt zone is connected to the inlet pipeline of the primary analytical tank.

[0017] Furthermore, the continuous ion exchange device of the present invention further comprises a slurry top water zone, wherein the adsorption columns of the slurry top water zone are from the pure water top salt zone;

[0018] The inlet of the slurry top water zone is connected to the outlet pipeline of the primary adsorption zone, and the outlet of the slurry top water zone is connected to the inlet pipeline of the application water tank.

[0019] Furthermore, in the continuous ion exchange device of the present invention, the adsorption zone also includes a feed pump, the feed pump inlet is connected to the feed tank outlet pipe, and the feed pump outlet is connected to the primary adsorption zone inlet pipe.

[0020] Furthermore, in the continuous ion exchange device of the present invention, the adsorption zone also includes a sedimentation tank, the outlet of the de-suspended zone is connected to the inlet pipe of the sedimentation tank, and the outlet of the sedimentation tank is connected to the inlet pipe of the feed tank.

[0021] Furthermore, in the continuous ion exchange device of the present invention, the outlet of the backwash and impurity removal zone is connected to the inlet of the wash water tank and the inlet pipeline of the sedimentation tank respectively.

[0022] Furthermore, in the continuous ion exchange device of the present invention, the decomposition zone further comprises a secondary decomposition tank, a first decomposition pump and a second decomposition pump;

[0023] The outlet of the first-stage analysis tank is connected to the inlet pipeline of the first analysis pump, and the outlet of the first analysis pump is connected to the inlet pipeline of the first-stage analysis area;

[0024] The outlet of the primary analysis area is connected to the inlet pipeline of the secondary analysis tank, the outlet of the secondary analysis tank is connected to the inlet pipeline of the second analysis pump, and the outlet of the second analysis pump is connected to the inlet pipeline of the secondary analysis area.

[0025] Furthermore, in the continuous ion exchange device of the present invention, the analysis zone further comprises a first valve and a second valve;

[0026] The first valve is arranged on the pipeline between the outlet of the secondary analysis area and the inlet of the qualified analysis liquid tank; the second valve is arranged on the pipeline between the outlet of the secondary analysis area and the inlet of the application water tank.

[0027] Compared with the prior art, the continuous ion exchange device for producing potassium phytate provided by the present invention prepares potassium phytate through corn soaking water, and the device comprises an adsorption zone, an impurity removal zone, a desorption zone and a water top salt zone which are connected in sequence; the phytate ions in the corn soaking water can be enriched by the sequential cooperation of the adsorption zone, the impurity removal zone, the desorption zone and the water top salt zone, so as to prepare potassium phytate; the adsorption zone comprises a solid suspension removal zone, a primary adsorption zone, a secondary adsorption zone, a loose resin zone, a feed tank and a re-slurry tank, and the solid suspension removal zone, the primary adsorption zone, the secondary adsorption zone and the loose resin zone are each provided with at least one adsorption column; by connecting the outlet of the feed tank with the inlet pipeline of the primary adsorption zone, a part of the phytate ions in the corn soaking water are adsorbed by the primary adsorption zone Attached column adsorption, and then the outlet of the primary adsorption zone is respectively connected with the inlet of the secondary adsorption zone, the inlet of the loose resin zone and the inlet pipeline of the solid suspension removal zone. After passing through the primary adsorption zone, the phytate ions remaining in a part of the corn soaking water are further adsorbed by the adsorption column of the secondary adsorption zone, and another part of the corn soaking water is fed back into the solid suspension removal zone to backwash the adsorption column that has been saturated with adsorption to remove residual solid impurities. Another part of the corn soaking water is fed back into the loose resin zone, which is the zone to be adsorbed. The backflow of corn soaking water can loosen the resin in the adsorption column of the loose resin zone to avoid the resin from being compacted in the adsorption column when the corn soaking water is passing through the column, which affects the adsorption efficiency of phytate ions and the normal operation of the equipment.

[0028] Furthermore, the present invention can recycle the corn soaking water that has passed through the de-solidification zone to the feed tank inlet pipe by connecting the outlet of the de-solidification zone to the feed tank for re-column passing; in the above process, after the corn soaking water passes through the primary adsorption zone and the secondary adsorption zone in sequence, the phytate ions are basically completely adsorbed, and at the same time, when a part of the corn soaking water that has passed through the primary adsorption zone is fed back into the loose resin zone, the adsorption column of the loose resin zone further adsorbs the phytate ions in the corn soaking water, so that the effluent of the loose resin zone basically does not contain phytate ions. Therefore, the present invention can collect the corn soaking water after passing through the secondary adsorption zone and the loose resin zone in the re-slurry tank by connecting the outlet of the secondary adsorption zone and the outlet of the loose resin zone to the re-slurry tank inlet pipe, and can be processed centrally later. Through the above technical scheme of the present invention, the technical problem that the existing ion exchange device has resin agglomeration and hardening when producing potassium phytate, which makes the ion exchange device unable to operate stably for a long time is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0030] Figure 1 A schematic diagram of the structure of the adsorption zone of the continuous ion exchange device provided in an embodiment of the present invention;

[0031] Figure 2 A schematic diagram of the structure of the impurity removal zone of the continuous ion exchange device provided in an embodiment of the present invention;

[0032] Figure 3 A schematic diagram of the structure of the decomposition zone of the continuous ion exchange device provided in an embodiment of the present invention;

[0033] Figure 4 A schematic diagram of the structure of the water top salt zone of the continuous ion exchange device provided in an embodiment of the present invention;

[0034] Figure 5 A schematic structural diagram of a slurry top water zone of a continuous ion exchange device provided in an embodiment of the present invention;

[0035] Reference numerals:

[0036] 1. Adsorption zone; 101. Solid suspension removal zone; 102. Primary adsorption zone; 103. Secondary adsorption zone; 104. Loose resin zone; 105. Feed tank; 106. Reslurry tank; 107. Feed pump; 108. Settling tank; 109. Settling liquid pump; 2. Decontamination zone; 201. Backwash decontamination zone; 202. Forward wash decontamination zone; 203. Pure water tank; 204. Application water tank; 205. Washing water tank; 206. Third valve; 207. Fourth valve; 208. Application water pump; 209. First pure water pump; 3. , analysis area; 301, primary analysis area; 302, secondary analysis area; 303, primary analysis tank; 304, qualified analysis liquid tank; 305, secondary analysis tank; 306, first analysis pump; 307, second analysis pump; 308, first valve; 309, second valve; 4, water top salt area; 401, pure water top salt area; 402, membrane permeate liquid top salt area; 403, chemical salt tank; 404, membrane permeate liquid tank; 405, second pure water pump; 406, chemical salt pump; 407, membrane permeate liquid pump; 5, slurry top water area. DETAILED DESCRIPTION

[0037] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0038] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The meaning of "several" is one or more, unless otherwise clearly and specifically defined.

[0040] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "front", "back", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the prior art, in the process of preparing potassium phytate from corn soaking water, since the corn soaking water contains a large amount of suspended solids, the suspended solids in the corn soaking water will cause the resin to clump and harden after entering the resin column. The suspended solids in the corn soaking water are difficult to completely remove, making it impossible for the existing single-column ion exchange and conventional continuous ion exchange devices to operate stably for a long time.

[0043] In order to solve the above technical problems, the present invention provides a continuous ion exchange device for producing potassium phytate, see Figures 1 to 5The device comprises an adsorption zone 1, an impurity removal zone 2, a decomposition zone 3 and a water top salt zone 4 which are connected in sequence, wherein the adsorption zone 1 comprises a solid suspension removal zone 101, a primary adsorption zone 102, a secondary adsorption zone 103, a loose resin zone 104, a feed tank 105 and a re-slurry tank 106, and the solid suspension removal zone 101, the primary adsorption zone 102, the secondary adsorption zone 103 and the loose resin zone 104 are each provided with at least one adsorption column; the feed tank 105 outlet is connected to the primary adsorption zone 102 inlet pipeline, and the primary adsorption zone 102 outlet is respectively connected to the secondary adsorption zone 103 inlet, the loose resin zone 104 inlet and the solid suspension removal zone 101 inlet pipeline; the solid suspension removal zone 101 outlet is connected to the feed tank 105 inlet pipeline, and the secondary adsorption zone 103 outlet and the loose resin zone 104 outlet are both connected to the re-slurry tank 106 inlet pipeline.

[0044] In specific implementation, the corn soaking water in the feed tank 105 first enters the primary adsorption zone 102 and passes through the column. Figure 1 As shown, in this embodiment, 5 parallel adsorption columns are arranged in the primary adsorption zone 102. The implementer can set the number of adsorption columns in the primary adsorption zone 102 according to the actual operating conditions. The corn soaking water passing through the primary adsorption zone 102 is divided into three parts. The first part is reversed from the bottom of the de-solidification zone 101 and recovered to the feed tank 105 through the outlet of the de-solidification zone 101. The second part enters the secondary adsorption zone 103 to pass through the column, and is collected in the return slurry tank 106 after secondary adsorption. Figure 1 As shown, the secondary adsorption zone 103 of this embodiment is provided with 3 adsorption columns in parallel, and the implementer can set the number of adsorption columns in the secondary adsorption zone 103 according to the actual operating conditions. The third part is reversed from the inlet of the loose resin zone 104, and is collected in the re-slurry tank 106 through the outlet of the loose resin zone 104. The adsorption column of the desolidification zone 101 sequentially enters the impurity removal zone 2, the decomposition zone 3 and the water top salt zone 4 for subsequent treatment, and the potassium phytate can be prepared.

[0045] It can be known from the structure and specific implementation process of the above-mentioned continuous ion exchange device that the present invention can achieve the enrichment of phytate ions in the corn soaked water by passing the corn soaked water through the primary adsorption zone 102 and the secondary adsorption zone 103 after two-stage adsorption. At the same time, the adsorption column saturated with adsorption is reversed into the solid removal zone 101 for impurity removal, which can avoid the accumulation of solid impurities and the compaction of resin in the adsorption column, and then cause the adsorption column to be blocked and unable to perform subsequent impurity removal, analysis and water top salt treatment, affecting the normal operation of the ion exchange device; by reversely feeding the loose resin zone 104 into the primary column liquid, the resin in the adsorption column of the loose resin zone 104 can be loosened to avoid clogging when passing through the primary adsorption zone 102 or the secondary adsorption zone 103. The adsorption column of the loose resin zone 104 can be an adsorption column newly loaded with resin, which can come from the slurry top water zone.

[0046] See also Figure 1 and Figure 2 As a possible implementation mode, in the continuous ion exchange device provided by the present invention, the impurity removal zone 2 includes a backwash impurity removal zone 201, a forward wash impurity removal zone 202, a pure water tank 203, an application water tank 204 and a washing water tank 205, and the adsorption column of the backwash impurity removal zone 201 comes from the solid suspension removal zone 101, and the adsorption column of the forward wash impurity removal zone 202 comes from the backwash impurity removal zone 201; wherein, the outlet of the pure water tank 203 is connected to the inlet pipe of the forward wash impurity removal zone 202, and the outlet of the forward wash impurity removal zone 202 is connected to the inlet pipe of the application water tank 204; the outlet of the application water tank 204 is connected to the inlet pipe of the backwash impurity removal zone 201, and the outlet of the backwash impurity removal zone 201 is respectively connected to the inlet pipes of the washing water tank 205 and the inlet pipes of the feed tank 105.

[0047] In a specific implementation, the adsorption column of the backwash impurity removal zone 201 is reversed into the application water of the application water tank 204, and the adsorption column from the solid suspension removal zone 101 is further impurity-removed. The application water flows through the 0.4BV effluent before the outlet of the backwash impurity removal zone 201 to the feed tank 105, and the remaining effluent is collected in the wash water tank 205. The collected liquid in the wash water tank 205 can be concentrated and then sent to the feed tank 105; the adsorption column of the backwash impurity removal zone 201 enters the forward wash impurity removal zone 202 after backwash impurity removal, and the pure water of the pure water tank 203 flows forward into the forward wash impurity removal zone 202. The forward wash impurity removal zone 202 is formed by one or more adsorption columns in series, such as Figure 2As shown, the forward wash and impurity removal zone 202 of this embodiment is provided with three adsorption columns connected in series. The implementer can set the number of adsorption columns of the forward wash and impurity removal zone 202 according to the actual operating conditions. The outlet of the forward wash and impurity removal zone 202 is connected to the inlet of the application water tank 204. The pure water after passing through the column in the forward wash and impurity removal zone 202 enters the application water tank 204 and can be used to backwash and remove impurities from the adsorption columns of the backwash and impurity removal zone 201.

[0048] By adopting the above technical scheme, in the continuous ion exchange device provided by the present invention, the backwash impurity removal zone 201 performs backwash impurity removal on the adsorption column from the solid suspension removal zone 101, and can first remove the impurities that are difficult to pass through the adsorption column by backwashing, and then perform forward washing and impurity removal through the forward washing impurity removal zone 202, so that the impurities in the adsorption column can be basically completely removed. At the same time, in the process of backwashing and impurity removal, the resin in the adsorption column can be further loosened to avoid the resin in the adsorption column from being compacted.

[0049] Furthermore, the impurity removal zone 2 further includes a third valve 206, a fourth valve 207, an application water pump 208 and a first pure water pump 209. The third valve 206 is arranged on the pipeline between the outlet of the backwash impurity removal zone 201 and the inlet of the washing water tank 205, and the fourth valve 207 is arranged on the pipeline between the outlet of the backwash impurity removal zone 201 and the inlet of the feed tank 105. The flow direction and flow rate of the effluent of the backwash impurity removal zone 201 can be accurately controlled by the third valve 206 and the fourth valve 207. The application water pump 208 provides power for the application water entering the backwash impurity removal zone 201, and the first pure water pump 209 provides power for the pure water entering the forward washing impurity removal zone 202. The arrangement of the third valve 206, the fourth valve 207, the application water pump 208 and the first pure water pump 209 can ensure the stable and efficient operation of the continuous ion exchange device of the present invention.

[0050] See also Figure 2 and Figure 3 As a possible implementation mode, in the continuous ion exchange device provided by the present invention, the analysis zone 3 includes a primary analysis zone 301, a secondary analysis zone 302, a primary analysis tank 303 and a qualified analysis liquid tank 304, and the adsorption column of the secondary analysis zone 302 comes from the positive washing impurity removal zone 202, and the adsorption column of the primary analysis zone 301 comes from the secondary analysis zone 302; wherein, the outlet of the primary analysis tank 303 is connected to the inlet pipeline of the primary analysis zone 301, and the outlet of the primary analysis zone 301 is connected to the inlet pipeline of the secondary analysis zone 302; the outlet of the secondary analysis zone 302 is respectively connected to the inlet pipelines of the qualified analysis liquid tank 304 and the application water tank 204.

[0051] In this embodiment, the adsorption column of the secondary analysis area 302 comes from the positive washing and impurity removal area 202. In the specific implementation process, the adsorption column from the positive washing and impurity removal area 202 is first subjected to secondary solution analysis in the secondary analysis area 302, and the secondary solution from the primary analysis area 301 is directly fed into the secondary analysis area 302. The first 0.4BV effluent of the secondary solution is sent to the application water tank 204 through the outlet of the secondary analysis area 302 to push out the residual pure water in the adsorption column of the secondary analysis area 302, and the rest of the effluent enters the qualified analysis liquid tank 304, and the prepared potassium phytate solution is collected into the qualified analysis liquid tank 304. The potassium phytate solution in the qualified analysis liquid tank 304 is concentrated by a nanofiltration membrane to prepare a potassium phytate product. For example, the molecular weight of the nanofiltration membrane is 800-1000 Daltons. The adsorption column of the secondary analysis area 302 is transferred to the primary analysis area 301 after the secondary analysis liquid passes through the column, and the analysis liquid containing potassium salt in the primary analysis tank 303 is entering the primary analysis area 301. Figure 3 As shown, the primary analysis area 301 of this embodiment is provided with three adsorption columns connected in series. The implementer can set the number of adsorption columns of the primary analysis area 301 according to the actual operating conditions. The outlet of the primary analysis area 301 is connected to the inlet of the secondary analysis area 302, so that the secondary analysis liquid flowing out of the primary analysis area 301 enters the secondary analysis area 302, and the adsorption columns of the secondary analysis area 302 are analyzed by the secondary analysis liquid.

[0052] By adopting the above technical scheme, in the continuous ion exchange device provided by the present invention, the phytate ions adsorbed by the adsorption column can be completely desorbed by passing the adsorption column from the positive washing and impurity removal zone 202 through the secondary decomposition zone 302 and the primary decomposition zone 301 in sequence, and a potassium phytate product can be prepared. The first 0.4BV of the effluent of the secondary solution is collected in the application water tank 204 through the outlet of the secondary decomposition zone 302, and while the residual pure water in the adsorption column of the secondary decomposition zone 302 is pushed out, this part of the effluent is collected in the application water tank 204 for recycling, thereby reducing the preparation cost of potassium phytate.

[0053] See also Figures 1 to 4As a possible implementation mode, in the continuous ion exchange device provided by the present invention, the water top salt area 4 includes a pure water top salt area 401, a membrane permeate liquid top salt area 402, a salt tank 403 and a membrane permeate liquid tank 404, and the adsorption column of the membrane permeate liquid top salt area 402 comes from the primary analysis area 301, and the adsorption column of the pure water top salt area 401 comes from the membrane permeate liquid top salt area 402; wherein, the outlet of the pure water tank 203 is connected to the inlet pipeline of the pure water top salt area 401, the outlet of the pure water top salt area 401 is connected to the inlet pipeline of the salt tank 403, and the outlet of the salt tank 403 is connected to the inlet pipeline of the primary analysis tank 303; the outlet of the qualified analysis liquid tank 304 is connected to the inlet pipeline of the membrane permeate liquid tank 404, the outlet of the membrane permeate liquid tank 404 is connected to the inlet pipeline of the membrane permeate liquid top salt area 402, and the outlet of the membrane permeate liquid top salt area 402 is connected to the inlet pipeline of the primary analysis tank 303.

[0054] In a specific implementation, the nanofiltration membrane permeate of the qualified analytical liquid tank 304 enters the membrane permeate tank 404, the adsorption column of the membrane permeate top salt area 402 comes from the primary analytical area 301, and the membrane permeate of the membrane permeate tank 404 is entering the adsorption column of the membrane permeate top salt area 402, and a part of the residual analytical liquid in the adsorption column of the membrane permeate top salt area is eluted to the primary analytical tank 303 for recycling, and then the membrane permeate top salt area 402 adsorption column Transfer to the pure water top salt area 401. The pure water top salt area 401 of the present embodiment is provided with two adsorption columns connected in series. The implementer can set the number of adsorption columns in the pure water top salt area 401 according to the actual operating conditions. The pure water in the pure water tank 203 is entering the pure water top salt area 401, and the analysis liquid remaining in the adsorption column of the pure water top salt area 401 is eluted to the salt tank 403, and then sent to the primary analysis tank 303 for recycling after salting in the salt tank 403.

[0055] By adopting the above technical scheme, in the continuous ion exchange device provided by the present invention, the adsorption column from the primary analysis area 301 can be removed cleanly by passing the adsorption column through the membrane permeate top salt area 402 for desalination and the pure water top salt area 401 for desalination in sequence. At the same time, by eluting a part of the residual analysis solution in the adsorption column in the membrane permeate top salt area to the primary analysis tank 303 for recycling, and eluting the residual analysis solution in the adsorption column of the pure water top salt area 401 to the salt tank 403, and then going to the primary analysis tank 303 for recycling after salting in the salt tank 403, the preparation cost of potassium phytate can be greatly reduced.

[0056] Furthermore, the water top salt area 4 also includes a second pure water pump 405, a brine pump 406 and a membrane permeate liquid pump 407. The second pure water pump 405 provides power for the pure water flowing into the pure water top salt area 401, the brine pump 406 provides power for the brine flowing into the primary analysis tank 303, and the membrane permeate liquid pump 407 provides power for the membrane permeate flowing into the membrane permeate liquid top salt area 402. The arrangement of the second pure water pump 405, the brine pump 406 and the membrane permeate liquid pump 407 can ensure the stable and efficient operation of the continuous ion exchange device of the present invention.

[0057] See also Figure 5 As a possible implementation, the continuous ion exchange device provided by the present invention further includes a slurry top water area 5, the adsorption column of the slurry top water area 5 comes from the pure water top salt area 401; the inlet of the slurry top water area 5 is connected to the outlet pipe of the primary adsorption area 102, and the outlet of the slurry top water area 5 is connected to the inlet pipe of the application water tank 204. With the above technical solution, the adsorption column from the pure water top salt area 401 contains a large amount of pure water. If the adsorption column is directly transferred to the loose resin area 104 for the next adsorption, a large amount of waste water will be generated. Therefore, the present invention passes the effluent of the primary adsorption area 102 through the adsorption column from the pure water top salt area 401 through the slurry top water area 5, and the pure water in the adsorption column can be pushed out and collected and recycled in the application water tank 204, which can reduce the preparation cost of potassium phytate of the present invention.

[0058] See also Figure 1 As a possible implementation, the adsorption zone 1 of the continuous ion exchange device provided by the present invention further includes a feed pump 107, the inlet of the feed pump 107 is connected to the outlet pipe of the feed tank 105, and the outlet of the feed pump 107 is connected to the inlet pipe of the primary adsorption zone 102. With the above technical solution, the feed pump 107 provides power for the corn soaking water entering the primary adsorption zone 102. At the same time, the flow rate of the corn soaking water in the primary adsorption zone 102 can be controlled by the feed pump 107, so as to improve the enrichment efficiency of phytate ions in the corn soaking water by the adsorption columns of the primary adsorption zone 102 and the secondary adsorption zone 103, so as to increase the preparation amount of potassium phytate.

[0059] See also Figure 1As a possible implementation, the adsorption zone 1 of the continuous ion exchange device provided by the present invention further includes a settling tank 108, the outlet of the solid suspension removal zone 101 is connected to the inlet pipe of the settling tank 108, and the outlet of the settling tank 108 is connected to the inlet pipe of the feed tank 105. By adopting the above technical scheme, the corn soaking water can be placed in the settling tank 108 for a period of time, so that the impurities in the corn soaking water are settled at the bottom of the settling tank 108, and then the clear corn soaking water is pumped into the feed tank 105 for column adsorption. At the same time, the effluent of the solid suspension removal zone 101 also contains a lot of impurities. The effluent of the solid suspension removal zone 101 is settled in the settling tank 108 to remove the impurities. The present invention can effectively avoid the blockage and compaction of the resin in the adsorption column during column adsorption by settling the impurities in the corn soaking water in the settling tank 108, thereby ensuring the stable operation of the ion exchange device.

[0060] Furthermore, the adsorption zone 1 of the present invention also includes a sedimentation liquid pump 109, the inlet of the sedimentation liquid pump 109 is connected to the outlet pipe of the sedimentation tank 108, and the outlet of the sedimentation pump 109 is connected to the inlet pipe of the feed tank 105. The sedimentation liquid pump 109 enters the feed tank 105 to increase the power and ensure the efficient operation of the ion exchange device.

[0061] See also Figure 1 and Figure 2 As a possible implementation, in the continuous ion exchange device provided by the present invention, the outlet of the backwash and impurity removal zone 201 is respectively connected to the inlet of the wash water tank 205 and the inlet pipe of the settling tank 108. With the above technical solution, the 0.4BV effluent before the outlet of the backwash and impurity removal zone 201 contains a lot of impurities. This part of the effluent is settled in the settling tank 108 to remove the impurities and avoid clogging the adsorption column when it directly enters the primary adsorption zone 102.

[0062] See also Figure 3 As a possible implementation mode, in the continuous ion exchange device provided by the present invention, the analysis zone 3 further includes a secondary analysis tank 305, a first analysis pump 306 and a second analysis pump 307; the outlet of the primary analysis tank 303 is connected to the inlet pipeline of the first analysis pump 306, and the outlet of the first analysis pump 306 is connected to the inlet pipeline of the primary analysis zone 301; the outlet of the primary analysis zone 301 is connected to the inlet pipeline of the secondary analysis tank 305, the outlet of the secondary analysis tank 305 is connected to the inlet pipeline of the second analysis pump 307, and the outlet of the second analysis pump 307 is connected to the inlet pipeline of the secondary analysis zone 302.

[0063] During specific implementation, the secondary analysis liquid exiting the primary analysis area 301 is first collected in the secondary analysis tank 305, and pumped into the secondary analysis area 302 through the second analysis pump 307. The primary analysis liquid in the primary analysis tank 303 is pumped into the primary analysis area 301 through the first analysis pump 306 to provide power for the primary analysis liquid. By adopting the above technical solution, after the secondary analysis liquid is collected through the secondary analysis tank 305, it can be ensured that the secondary analysis liquid is sufficient when the secondary analysis liquid passes through the column to avoid interruption of flow, which affects the analysis efficiency of the adsorption column in the secondary analysis area 302. The second analysis pump 307 can provide power for the secondary analysis liquid and control the flow rate of the secondary analysis liquid within a normal range. The setting of the secondary analysis tank 305, the first analysis pump 306 and the second analysis pump 307 can ensure the stable and efficient operation of the continuous ion exchange device of the present invention.

[0064] See also Figure 3 As a possible implementation, the analysis zone 3 of the continuous ion exchange device provided by the present invention also includes a first valve 308 and a second valve 309; the first valve 308 is arranged on the pipeline between the outlet of the secondary analysis zone 302 and the inlet of the qualified analysis liquid tank 304; the second valve 309 is arranged on the pipeline between the outlet of the secondary analysis zone 302 and the inlet of the application water tank 204. By adopting the above technical scheme, the first valve 308 is used to control the flow rate of the pipeline between the outlet of the secondary analysis area 302 and the inlet of the qualified analysis liquid tank 304, and the second valve 309 is used to control the flow rate of the pipeline between the outlet of the secondary analysis area 302 and the inlet of the application water tank 204. In the specific implementation process, the second valve 309 is first opened, and the first valve 308 is closed. The first 0.4BV of the effluent with a higher water content at the outlet of the secondary analysis area 302 first enters the application water tank 204 for collection, and then the first valve 308 is opened, and the second valve 309 is closed, and the remaining effluent is collected in the qualified analysis liquid tank 304. The setting of the first valve 308 and the second valve 309 can accurately control the collection amount of the application water tank 204, and the qualified potassium phytate solution is collected in the qualified analysis liquid tank 304 through the outlet of the secondary analysis area 302, thereby improving the preparation efficiency of potassium phytate. The first 0.4 BV of the effluent from the secondary decomposition zone 302 is pumped into the water tank 204 for recycling, thereby reducing the preparation cost of potassium phytate.

[0065] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0066] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A continuous ion exchange device for producing potassium phytate, characterized in that: It includes an adsorption zone, an impurity removal zone, a decomposition zone and a water top salt zone which are connected in sequence; The adsorption zone includes a solid suspension removal zone, a primary adsorption zone, a secondary adsorption zone, a loose resin zone, a feed tank and a reslurry tank, and each of the solid suspension removal zone, the primary adsorption zone, the secondary adsorption zone and the loose resin zone is provided with at least one adsorption column; The outlet of the feed tank is connected to the inlet pipeline of the primary adsorption zone, and the outlet of the primary adsorption zone is respectively connected to the inlet pipelines of the secondary adsorption zone, the inlet of the loose resin zone and the inlet pipelines of the desuspension zone; The outlet of the desuspension zone is connected to the inlet pipeline of the feed tank, and the outlet of the secondary adsorption zone and the outlet of the loose resin zone are both connected to the inlet pipeline of the reslurry tank.

2. The continuous ion exchange device according to claim 1, characterized in that The impurity removal area includes a backwash impurity removal area, a forward wash impurity removal area, a pure water tank, a water tank and a wash water tank, and the adsorption column of the backwash impurity removal area comes from the solid suspension removal area, and the adsorption column of the forward wash impurity removal area comes from the backwash impurity removal area; Wherein, the outlet of the pure water tank is connected to the inlet pipe of the positive washing and impurity removal area, and the outlet of the positive washing and impurity removal area is connected to the inlet pipe of the application water tank; The outlet of the application water tank is connected to the inlet pipeline of the backwashing and impurity removal zone, and the outlet of the backwashing and impurity removal zone is respectively connected to the inlet pipeline of the washing water tank and the inlet pipeline of the feed tank.

3. The continuous ion exchange device according to claim 2, characterized in that The analysis area includes a primary analysis area, a secondary analysis area, a primary analysis tank and a qualified analysis liquid tank, and the adsorption column of the secondary analysis area comes from the positive washing and impurity removal area, and the adsorption column of the primary analysis area comes from the secondary analysis area; Wherein, the outlet of the primary analysis tank is connected to the inlet pipeline of the primary analysis area, and the outlet of the primary analysis area is connected to the inlet pipeline of the secondary analysis area; The outlet of the secondary analysis area is connected to the inlet of the qualified analysis liquid tank and the inlet pipeline of the application water tank respectively.

4. The continuous ion exchange device according to claim 3, characterized in that The water top salt area includes a pure water top salt area, a membrane permeate liquid top salt area, a salt tank and a membrane permeate liquid tank, and the adsorption column of the membrane permeate liquid top salt area comes from the primary analysis area, and the adsorption column of the pure water top salt area comes from the membrane permeate liquid top salt area; Wherein, the outlet of the pure water tank is connected to the inlet pipeline of the pure water top salt area, the outlet of the pure water top salt area is connected to the inlet pipeline of the salt tank, and the outlet of the salt tank is connected to the inlet pipeline of the primary analysis tank; The outlet of the qualified analytical liquid tank is connected to the inlet pipeline of the membrane permeate liquid tank, the outlet of the membrane permeate liquid tank is connected to the inlet pipeline of the membrane permeate liquid top salt zone, and the outlet of the membrane permeate liquid top salt zone is connected to the inlet pipeline of the primary analytical tank.

5. The continuous ion exchange device according to claim 4, characterized in that It also includes a slurry top water area, wherein the adsorption column of the slurry top water area comes from the pure water top salt area; The inlet of the slurry top water zone is connected to the outlet pipeline of the primary adsorption zone, and the outlet of the slurry top water zone is connected to the inlet pipeline of the application water tank.

6. The continuous ion exchange device according to claim 1, characterized in that The adsorption zone further comprises a feed pump, the feed pump inlet is connected to the feed tank outlet pipeline, and the feed pump outlet is connected to the primary adsorption zone inlet pipeline.

7. The continuous ion exchange device according to claim 2, characterized in that: The adsorption zone also includes a sedimentation tank, the outlet of the de-suspended zone is connected to the inlet pipeline of the sedimentation tank, and the outlet of the sedimentation tank is connected to the inlet pipeline of the feed tank.

8. The continuous ion exchange device according to claim 7, characterized in that The outlet of the backwash and impurity removal zone is connected to the inlet pipe of the wash water tank and the inlet pipe of the sedimentation tank respectively.

9. The continuous ion exchange device according to claim 3, characterized in that: The analysis area also includes a secondary analysis tank, a first analysis pump and a second analysis pump; The outlet of the first-stage analysis tank is connected to the inlet pipeline of the first analysis pump, and the outlet of the first analysis pump is connected to the inlet pipeline of the first-stage analysis area; The outlet of the primary analysis area is connected to the inlet pipeline of the secondary analysis tank, the outlet of the secondary analysis tank is connected to the inlet pipeline of the second analysis pump, and the outlet of the second analysis pump is connected to the inlet pipeline of the secondary analysis area.

10. The continuous ion exchange device according to claim 3, characterized in that: The analysis zone also includes a first valve and a second valve; The first valve is arranged on the pipeline between the outlet of the secondary analysis area and the inlet of the qualified analysis liquid tank; the second valve is arranged on the pipeline between the outlet of the secondary analysis area and the inlet of the application water tank.

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