CN216191653U

CN216191653U - Device for salt concentration and resource treatment

Info

Publication number: CN216191653U
Application number: CN202122750803.7U
Authority: CN
Inventors: 王启伟; 李雅; 许宝建
Original assignee: Xuzhou Secco Kanglun Intelligent Equipment Co ltd
Current assignee: Xuzhou Secco Kanglun Intelligent Equipment Co ltd
Priority date: 2021-11-11
Filing date: 2021-11-11
Publication date: 2022-04-05
Anticipated expiration: 2031-11-11

Abstract

The utility model provides a device of concentrated and resourceful treatment of salt, belongs to waste water treatment equipment technical field, comprises high pressure reverse osmosis system, absorption defluorination system, electrodialysis system, chelate resin system and bipolar membrane electrodialysis system. The high-pressure reverse osmosis system is used for high-pressure concentration of high-salt water; the electrodialysis is used for secondary concentration of the high-pressure reverse osmosis concentrated water; the adsorption defluorination system is used for removing F ions in the wastewater so as to prevent the F ions from entering an electrodialysis electrode chamber and corroding electrode plates; the chelating resin is used for removing heavy metal cations in the electrodialysis concentrated water; bipolar membrane electrodialysis is used to convert salts in electrodialysis concentrate into the corresponding acids or bases. The device can further concentrate salt-containing wastewater with the salt concentration of 10-30 g/L, the salt content range of high-pressure reverse osmosis concentrated water is 30-60 g/L, the salt content of electrodialysis concentrated water is 60-150 g/L, and the acid and alkali production concentration of bipolar membrane electrodialysis is 5% -10%.

Description

Device for salt concentration and resource treatment

Technical Field

The utility model belongs to the technical field of wastewater treatment equipment, and relates to a device for salt concentration and resource treatment.

Background

At present, the requirement of zero discharge of environment-friendly wastewater is met, and the salt-containing wastewater cannot be directly discharged. The traditional evaporation concentration has high energy consumption, and the obtained salt product is often mixed salt, or the purity of single salt is not enough, so that the salt product cannot be sold outside, and the salt product still needs to be treated as solid waste or even dangerous waste. The concentration of the salt-containing wastewater in the coal chemical industry is not high, the salt content of the salt-containing wastewater is still less than 10 g/L after the salt is separated by conventional reverse osmosis or nanofiltration, the direct evaporation energy consumption is high, and the recycling concentration is too low.

The urgent need is a waste water treatment equipment, can realize salt concentration and resourceful treatment with salt containing waste water.

Disclosure of Invention

The utility model aims to provide a device for salt concentration and resource treatment, which can be used for concentrating the treated high-salt-content wastewater again to reduce the concentrated brine, then carrying out acid-base regeneration on the concentrated brine to realize resource utilization of the concentrated brine, and simultaneously realizing reduction and resource recycling of the high-salt-content wastewater. The equipment can be used for treating various single or mixed salt wastewater with COD, heavy metals, calcium, magnesium and other contents meeting the water inlet requirement of a membrane system or meeting the water inlet requirement of the membrane system after treatment, and can treat the wastewater requirement: the salt content is 10-30 g/L, COD is less than 100 mg/L, the total hardness is less than 10 mg/L, and the salt-free water treatment agent does not contain oils and organic solvents. The purpose of the utility model is realized by the following technical scheme.

A device for salt concentration and resource treatment is characterized by comprising a high-pressure reverse osmosis system, an adsorption defluorination system, an electrodialysis system, a chelating resin system and a bipolar membrane electrodialysis system. The high-pressure reverse osmosis system is used for high-pressure concentration of high-salt water; the electrodialysis is used for secondary concentration of the high-pressure reverse osmosis concentrated water; the adsorption defluorination system is used for removing F ions in the wastewater so as to prevent the F ions from entering an electrodialysis electrode chamber to corrode an electrode plate, and F of the adsorption defluorination effluent is less than 1 mg/L; the chelating resin is used for removing heavy metal cations in the electrodialysis concentrated water; bipolar membrane electrodialysis is used to convert salts in electrodialysis concentrate into the corresponding acids or bases.

The main process of wastewater treatment comprises the following steps: the salt-containing water enters a high-pressure reverse osmosis system, the fresh water obtained by treatment is recycled, and the concentrated water enters an adsorption defluorination system. The defluorination effluent enters an electrodialysis system, concentrated water of the electrodialysis system enters a chelating resin system, and after impurity ions such as metal cations are removed, the concentrated water enters a bipolar membrane electrodialysis system to prepare acid and alkali; and fresh water of the electrodialysis system is returned to the high-pressure reverse osmosis system or discharged outside. And (4) enabling fresh water obtained by bipolar membrane electrodialysis to enter an electrodialysis system for continuous concentration.

Further, the device adopts sled dress integration mode, divide into three sled pieces, do respectively: the high-pressure reverse osmosis system is skid-mounted, the adsorption defluorination system is a skid block, and the electrodialysis system, the chelate resin system and the bipolar membrane electrodialysis system are skid blocks. And a skid-mounted integrated mode is adopted, so that the installation is rapid, and the movement and the moving are convenient.

Furthermore, automatic conductivity detectors are arranged at water inlets and water outlets of all systems of the device, and conductivity values of high-pressure RO water inlet and water outlet, electrodialysis concentrated water and fresh water, bipolar membrane electrodialysis saline water, acid liquor and alkali liquor can be detected in real time.

Further, the high-pressure reverse osmosis system comprises a high-pressure RO pre-booster pump, a high-pressure RO pipeline mixer, a high-pressure RO water inlet security filter, a high-pressure RO high-pressure water pump, a high-pressure RO membrane assembly and a high-pressure RO concentrated water tank; wherein the inlet of the high-pressure RO pre-booster pump is connected with a high-saline water inlet pipeline, and the outlet of the high-pressure RO pre-booster pump is connected with a high-pressure RO pipeline mixer; the top of the high-pressure RO pipeline mixer is connected with a scale inhibitor feeding pipeline, and the outlet of the high-pressure RO pipeline mixer is connected with the water inlet of the high-pressure RO water inlet security filter; the high-pressure RO water inlet security filter is connected with a high-pressure RO high-pressure water pump, the outlet of the high-pressure RO high-pressure water pump is connected with a high-pressure RO membrane component, and the concentrated water port of the membrane component is connected with the top of a high-pressure RO concentrated water tank.

Further, the adsorption defluorination system comprises an adsorption defluorination inlet pump, an adsorption defluorination column, an adsorption defluorination water production tank, a regeneration dissolving medicine tank, a regeneration pump and a regeneration pipeline mixer; the water inlet of the adsorption defluorination water inlet pump is connected with the bottom of the high-pressure RO concentrated water tank, the outlet of the adsorption defluorination water inlet pump is connected with the top of the adsorption defluorination column, and the outlet of the bottom of the adsorption defluorination column is connected with the top of the adsorption defluorination water production tank; the top of the regeneration solvent box is connected with a fresh water outlet of the high-pressure RO membrane component, and the bottom of the regeneration solvent box is connected with a water inlet of the regeneration pump; the outlet of the regeneration pump is connected with a regeneration pipeline mixer, and the regeneration pipeline mixer is connected with an aluminum sulfate dosing pipeline, so that the aluminum sulfate and the water of the regeneration dissolving tank are fully mixed in the regeneration pipeline mixer and then used for the regeneration of the defluorination resin, the water outlet of the regeneration pipeline mixer is connected with the bottom of the adsorption defluorination column, the water enters from bottom to top and is discharged, and the regenerated regeneration liquid is discharged outside.

Further, the electrodialysis system comprises an electrodialysis water inlet pump, an electrodialysis device, a concentrated water tank, a fresh water tank, an ED polar water tank, a cleaning water tank, a concentrated water delivery pump, a fresh water delivery pump, a polar water delivery pump, a cleaning water pump, a fresh water filter, a concentrated water filter, an ED polar water filter, a cleaning water filter, a concentrated water heat exchanger, an ED polar water heat exchanger and an electrodialysis electric control cabinet. The inlet of the electrodialysis water inlet pump is connected with the adsorption and fluorine removal water production tank, the outlet electrodialysis device is connected, and the adsorption and fluorine removal water production enters the electrodialysis device through the electrodialysis water inlet pump. The electrodialysis device consists of a membrane stack and a power supply, wherein four pipelines are led out from the membrane stack and respectively comprise a fresh water pipeline, a concentrated water pipeline, an electrode water pipeline and a cleaning pipeline; each pipeline enters from the bottom of the ED membrane stack, and the top of the ED membrane stack discharges water. The fresh water tank is connected with a fresh water delivery pump, the fresh water delivery pump is connected with a fresh water filter, the outlet water of the filter is connected with a fresh water inlet pipeline, after passing through the membrane stack, the fresh water outlet pipeline is divided into two branches, one branch returns to the top of the fresh water tank, and the other branch reaches the standard and is discharged or recycled. The concentrated water tank is connected with a concentrated water delivery pump, the concentrated water delivery pump is connected with a concentrated water filter, the outlet water of the concentrated water filter is connected with a concentrated water heat exchanger, the outlet pipe of the heat exchanger is connected with a concentrated water inlet pipe, after the membrane stack, the concentrated water outlet pipe is divided into two branches, one branch returns to the top of the concentrated water inlet tank, and the other branch enters a chelate resin system. The ED polar water tank is connected with the polar water delivery pump, the polar water delivery pump is connected with the polar water filter, the polar water filter outputs water and is connected with the polar water heat exchanger, the heat exchanger water outlet pipeline is connected with the polar water inlet pipeline, and after membrane stacking, the polar water outlet pipeline returns to the top of the ED polar water tank. The concentrated water heat exchanger and the ED polar water heat exchanger are respectively connected with an external condensed water pipeline. The cleaning water tank is connected with the cleaning water pump, the cleaning water pump is connected with the cleaning water filter, the water outlet of the cleaning water filter is connected with the cleaning water inlet pipeline, and after passing through the membrane stack, the cleaning water outlet pipeline returns to the top of the cleaning water inlet tank.

Further, the chelate resin system comprises an ion exchange raw water tank, a chelate resin water inlet pump, a chelate resin column and an ion exchange filter. The inlet of the ion exchange raw water tank is connected with a concentrated water outlet pipeline of the electrodialysis system, the outlet of the ion exchange raw water tank is connected with a chelate resin water inlet pump, concentrated water of the electrodialysis system enters the top of a chelate resin column through the water inlet pump and goes in and out from the top, the water outlet pipeline is connected with an ion exchange filter, and the water outlet of the ion exchange filter is connected with the bipolar membrane electrodialysis system. The regenerated acid and alkali of the chelating resin column come from a bipolar membrane electrodialysis system, a pipeline of the bipolar membrane electrodialysis system enters from the top of the chelating resin column, water is discharged from the bottom of the bipolar membrane electrodialysis system, the saturated chelating resin is regenerated, and regenerated liquid is discharged outside to be treated.

Further, the bipolar membrane electrodialysis system comprises a bipolar membrane electrodialysis device, a BPED brine tank, a BPED polar water tank, an acid liquid tank, an alkali liquid tank, an acid finished product tank, an alkali finished product tank, a BPED polar water pump, a BPED brine pump, an acid liquid pump, an alkali liquid pump, a finished product acid liquid pump, a finished product alkali liquid pump, a BPED polar water filter, a BPED brine filter, an acid liquid filter, an alkali liquid filter, an acid liquid heat exchanger, an alkali liquid heat exchanger, a BPED polar water heat exchanger, a BPED saline heat exchanger and a bipolar membrane electrodialysis electric control cabinet. The bipolar membrane electrodialysis device consists of a membrane stack and a power supply, wherein four pipelines are led out from the membrane stack: the system comprises a salt water pipeline, an acid production pipeline, an alkali production pipeline and an electrode water pipeline, wherein each pipeline enters from the bottom of a BPED membrane stack, and water is discharged from the top. BPED brine tank links to each other with BPED brine pump, and BPED brine pump connects BPED brine filter, and BPED brine filter outlet water links to each other with BPED brine heat exchanger, and the heat exchanger outlet conduit links to each other with the salt water inlet pipe way, and behind the membrane stack, salt water outlet pipe way divide into two: one returned to the top of the BPED brine tank and the other returned to the fresh water tank of the electrodialysis system for further concentration. The alkali liquor box is connected with an alkali liquor pump, the alkali liquor pump is connected with an alkali liquor filter, the outlet water of the alkali liquor filter is connected with an alkali liquor heat exchanger, a water outlet pipeline of the heat exchanger is connected with an alkali liquor inlet pipeline, after membrane stacking, an alkali liquor outlet pipe returns to the top of the alkali liquor box, the alkali liquor box is directly connected with the upper part of an alkali finished product box through a pipeline, and when the liquid level of the alkali liquor box exceeds the height of the pipeline, the overflow enters the alkali finished product box. The alkali finished product box is connected with a finished product alkali liquid pump, and the outlet of the pump is divided into two branches: one is connected with the chelating resin column for resin regeneration, and the other is sent out. The acid liquor tank is connected with an acid liquor pump, the acid liquor pump is connected with an acid liquor filter, the outlet water of the acid liquor filter is connected with an acid liquor heat exchanger, the outlet pipe of the heat exchanger is connected with the acid liquor inlet pipe, after membrane stacking, the acid liquor outlet pipe returns to the top of the acid liquor tank, the acid liquor tank is directly connected with the upper part of the acid finished product tank through a pipeline, and when the liquid level of the acid liquor tank exceeds the height of the pipeline, the acid liquor overflows into the acid finished product tank. The acid finished product box is connected with a finished product acid liquid pump, the outlet of the pump is divided into two branches, one branch is connected with the chelating resin column for resin regeneration, and the other branch is sent out. BPED utmost point water tank links to each other with BPED utmost point water pump, and BPED utmost point water pump connection BPED utmost point water filter, and BPED utmost point water filter goes out water and links to each other with BPED utmost point water heat exchanger, and the heat exchanger outlet conduit links to each other with utmost point water inlet pipe way, and behind the membrane stack, utmost point water outlet pipe way returns BPED utmost point water tank top. The acid liquor heat exchanger, the alkali liquor heat exchanger, the BPED polar water heat exchanger and the BPED brine heat exchanger are respectively connected with an external condensed water pipeline. The upper parts of the BPED water tank, the acid liquid tank and the alkali liquid tank are respectively connected with a fresh water outlet of the high-pressure RO membrane assembly and used for preparing initial solution.

Furthermore, the electrodialysis electric control cabinet and the bipolar membrane electrodialysis electric control cabinet are both provided with LED touch screens, and the change and adjustment of the voltage and the current values can be directly displayed and operated from the touch screens.

The present invention has the following advantageous technical effects.

The device is used for secondary concentration and resource recycling of high-salt-content wastewater, the salt-content wastewater with the salt concentration of 10-30 g/L can be further concentrated, the salt content range of high-pressure reverse osmosis concentrated water is 30-60 g/L, the salt content of electrodialysis concentrated water is 60-150 g/L, and the acid and alkali production concentration by bipolar membrane electrodialysis is 5% -10%.

The device has the characteristics that: 1) the automation degree is high; 2) the integration level is high; 3) the salt concentration and resource recycling can be realized; 4) the method is suitable for high-salt-content wastewater; 5) the method is suitable for various single salt-containing solutions or mixed salt-containing solutions such as sodium sulfate, sodium chloride, sodium nitrate, ammonium sulfate, ammonium chloride and the like; 6) the scale of the treatment capacity can be customized according to the requirement; 7) except for needing to be externally connected with pure water or tap water, electricity and part of chemical adding devices, other external auxiliary equipment is not needed; 8) the regeneration of the resin can be carried out by acid and alkali produced by the system, and the acid and alkali do not need to be purchased externally. 9) The method is suitable for high-salt wastewater subjected to pretreatment of COD and other impurity ions (heavy metals and the like), such as normal-pressure reverse osmosis pre-concentrated water and nanofiltration salt separation water. 10) The equipment adopts a skid-mounted integrated mode, is quick to install and is convenient to move and move.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic diagram of a high pressure reverse osmosis system.

FIG. 3 is a schematic diagram of the structure of an adsorption defluorination system.

Fig. 4 is a schematic diagram of the electrodialysis system.

FIG. 5 is a schematic diagram of the structure of a chelating resin system and a bipolar membrane electrodialysis system.

Reference numerals: 1-a high-pressure RO pre-booster pump, 2-a high-pressure RO pipeline mixer, 3-a high-pressure RO high-pressure pump, 4-a high-pressure RO water inlet cartridge filter, 5-a high-pressure RO membrane module, 6-a high-pressure RO concentrated water tank, 7-an adsorption defluorination water inlet pump, 8-an adsorption defluorination column, 9-an adsorption defluorination water production tank, 10-an electrodialysis water inlet pump, 11-a regeneration dissolving medicine tank, 12-a regeneration pipeline mixer, 13-a regeneration pump, 14-a cleaning water tank, 15-a fresh water tank, 16-a concentrated water tank, 17-an ED pole water tank, 18-a cleaning water pump, 19-a fresh water delivery pump, 20-a concentrated water delivery pump, 21-a pole water delivery pump, 22-a concentrated water filter, 23-ED pole water filter, 24-a cleaning water filter and 25-a concentrated water heat exchanger, 26-fresh water filter, 27-ED polar water heat exchanger, 28-electrodialysis device, 29-electrodialysis electric control cabinet, 30-BPED polar water tank, 31-BPED brine tank, 32-acid liquid tank, 33-acid finished product tank, 34-alkali liquid tank, 35-alkali finished product tank, 36-BPED polar water pump, 37-BPED brine pump, 38-acid liquid pump, 39-finished acid liquid pump, 40-alkali liquid pump, 41-finished alkali liquid pump, 42-BPED polar water filter, 43-BPED saline filter, 44-acid liquid filter, 45-alkali liquid filter, 46-chelating resin water inlet pump, 47-ion exchange raw water tank, 48-BPED polar water heat exchanger, 49-BPED polar water heat exchanger, 50-acid liquid heat exchanger, 51-alkali liquid heat exchanger, 52-chelating resin column, 53-ion exchange filter, 54-bipolar membrane electrodialysis electric control cabinet and 55-bipolar membrane electrodialysis device.

Detailed Description

The technical scheme of the utility model is clearly and completely described below by combining the attached drawings of the specification. It is to be understood that the described embodiments are merely exemplary of some, and not necessarily all, embodiments of the utility model. All other embodiments, which can be obtained by a person skilled in the art without making creative efforts based on the embodiments of the present invention, belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or quantity or location.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in figure 1, the device for salt concentration and resource treatment consists of a high-pressure reverse osmosis system, an adsorption defluorination system, an electrodialysis system, a chelating resin system and a bipolar membrane electrodialysis system. The device adopts sled dress integration mode, divide into three sled pieces, do respectively: the high-pressure reverse osmosis system is skid-mounted, the adsorption defluorination system is a skid block, and the electrodialysis system, the chelate resin system and the bipolar membrane electrodialysis system are skid blocks. The water inlet and outlet of each system of the device are equipped with automatic conductivity detectors.

As shown in fig. 2, the high pressure reverse osmosis system comprises a high pressure RO pre-booster pump 1, a high pressure RO line mixer 2, a high pressure RO high pressure water pump 3, a high pressure RO feed water cartridge filter 4, a high pressure RO membrane module 5 and a high pressure RO concentrate tank 6. Wherein the inlet of the high-pressure RO pre-booster pump 1 is connected with a high-salt water inlet pipeline, and the outlet is connected with the high-pressure RO pipeline mixer 2; the top of the high-pressure RO pipeline mixer 2 is connected with a scale inhibitor feeding pipeline, and the outlet of the high-pressure RO pipeline mixer 2 is connected with the water inlet of the high-pressure RO water inlet security filter 4; the high-pressure RO water inlet security filter 4 is connected with the high-pressure RO high-pressure water pump 3, the outlet of the high-pressure RO high-pressure water pump 3 is connected with the high-pressure RO membrane component 5, and the concentrated water port of the membrane component is connected with the top of the high-pressure RO concentrated water tank 6.

As shown in fig. 3, the adsorption defluorination system comprises an adsorption defluorination inlet pump 7, an adsorption defluorination column 8, an adsorption defluorination water production tank 9, a regeneration solvent tank 11, a regeneration pump 13 and a regeneration pipeline mixer 12; the water inlet of an adsorption defluorination inlet pump 7 is connected with the bottom of a high-pressure RO concentrated water tank 6, the outlet of the adsorption defluorination inlet pump 7 is connected with the top of an adsorption defluorination column 8, and the outlet of the bottom of the adsorption defluorination column 8 is connected with the top of an adsorption defluorination water tank 9; the top of the regeneration dissolving medicine tank 11 is connected with a fresh water outlet of the high-pressure RO membrane component 5, and the bottom of the regeneration dissolving medicine tank is connected with a water inlet of a regeneration pump 13; the outlet of the regeneration pump 13 is connected with a regeneration pipeline mixer 12, and the water outlet of the regeneration pipeline mixer 12 is connected with the bottom of the adsorption defluorination column 8.

As shown in fig. 3 and 4, the electrodialysis system includes an electrodialysis water inlet pump 10, an electrodialysis device 28, a concentrated water tank 16, a fresh water tank 15, an ED polar water tank 17, a cleaning water tank 14, a concentrated water delivery pump 20, a fresh water delivery pump 19, an polar water delivery pump 21, a cleaning water pump 18, a fresh water filter 26, a concentrated water filter 22, an ED polar water filter 23, a cleaning water filter 24, a concentrated water heat exchanger 25, an ED polar water heat exchanger 27, and an electrodialysis electric control cabinet 29. The inlet of the electrodialysis water inlet pump 10 is connected with the adsorption defluorination water generating tank 9, and the outlet is connected with the electrodialysis device 28. The electrodialysis device 28 is composed of a membrane stack and a power supply, wherein four pipelines are led out from the membrane stack, namely a fresh water pipeline, a concentrated water pipeline, an electrode water pipeline and a cleaning pipeline, and each pipeline enters from the bottom of the ED membrane stack and discharges water from the top. The fresh water tank 15 is connected with the fresh water delivery pump 19, the fresh water delivery pump 19 is connected with the fresh water filter 26, the outlet water of the fresh water filter 26 is connected with the fresh water inlet pipeline, and after the membrane stack, the fresh water outlet pipeline is divided into two branches: one returns to the top of the fresh water tank 15, and the other reaches the standard and is discharged or recycled. The concentrated water tank 16 is connected with a concentrated water delivery pump 20, the concentrated water delivery pump 20 is connected with a concentrated water filter 22, the outlet water of the concentrated water filter 22 is connected with a concentrated water heat exchanger 25, the outlet water pipeline of the heat exchanger is connected with a concentrated water inlet pipeline, after membrane stacking, the concentrated water outlet pipeline is divided into two branches, one branch returns to the top of the concentrated water tank 16, and the other branch enters a chelate resin system. ED utmost point water tank 17 links to each other with utmost point water delivery pump 21, and utmost point water delivery pump 21 connects utmost point water filter 23, and utmost point water filter 23 goes out water and links to each other with utmost point water heat exchanger 27, and the heat exchanger outlet conduit links to each other with utmost point water inlet pipe way, and behind the membrane stack, utmost point water outlet pipe way returns ED utmost point water tank 17 top. The concentrated water heat exchanger 25 and the ED polar water heat exchanger 27 are respectively connected with an external condensed water pipeline. The cleaning water tank 14 is connected with the cleaning water pump 18, the cleaning water pump 18 is connected with the cleaning water filter 24, the outlet water of the cleaning water filter 25 is connected with the cleaning water inlet pipeline, and after passing through the membrane stack, the cleaning water outlet pipeline returns to the top of the cleaning water tank 14.

As shown in fig. 5, the chelate resin system includes an ion exchange raw water tank 47, a chelate resin feed pump 46, a chelate resin column 52, and an ion exchange filter 53. An inlet of the ion exchange raw water tank 47 is connected with a concentrated water outlet pipeline of the electrodialysis system, an outlet of the ion exchange raw water tank 47 is connected with an inlet of a chelate resin inlet pump 46, an outlet of the chelate resin inlet pump 46 is connected with the top of a chelate resin column 52, the bottom of the chelate resin column 52 is connected with an ion exchange filter 53, and a water outlet of the ion exchange filter 53 is connected with the bipolar membrane electrodialysis system. The regenerated acid and alkali of the chelating resin column 52 comes from a bipolar membrane electrodialysis system, and a pipeline of the system enters from the top of the chelating resin column 52 and discharges water from the bottom. The bipolar membrane electrodialysis system comprises a bipolar membrane electrodialysis device 55, a BPED brine tank 31, a BPED pole water tank 30, an acid liquor tank 32, an alkali liquor tank 34, an acid finished product tank 33, an alkali finished product tank 35, a BPED pole water pump 36, a BPED brine pump 37, an acid liquor pump 38, an alkali liquor pump 40, a finished product acid liquor pump 39, a finished product alkali liquor pump 41, a BPED pole water filter 42, a BPED brine filter 43, an acid liquor filter 44, an alkali liquor filter 45, an acid liquor heat exchanger 50, an alkali liquor heat exchanger 51, a BPED pole water heat exchanger 48, a BPED brine heat exchanger 49 and a bipolar membrane electrodialysis electric control cabinet 54. The bipolar membrane electrodialysis device consists of a membrane stack and a power supply, wherein four pipelines are led out from the membrane stack: the system comprises a salt water pipeline, an acid production pipeline, an alkali production pipeline and an electrode water pipeline, wherein each pipeline enters from the bottom of a BPED membrane stack, and water is discharged from the top. BPED brine tank 31 links to each other with BPED brine pump 37, and BPED brine pump 37 connects BPED brine filter 43, and BPED brine filter 43 goes out water and links to each other with BPED brine heat exchanger 49, and the heat exchanger outlet conduit links to each other with the salt water inlet pipe way, and behind the membrane stack, the salt water outlet pipe way divide into two: one returning to the top of the BPED brine tank 31 and the other returning to the electrodialysis system fresh water tank 15. The alkali liquor tank 34 is connected with an alkali liquor pump 40, the alkali liquor pump 40 is connected with an alkali liquor filter 45, the outlet water of the alkali liquor filter 45 is connected with an alkali liquor heat exchanger 51, the water outlet pipeline of the heat exchanger is connected with an alkali liquor inlet pipeline, after membrane stacking, an alkali liquor outlet pipe returns to the top of the alkali liquor tank 34, and the upper parts of the alkali liquor tank 34 and the alkali finished product tank 35 are directly connected by a pipeline; the alkali finished product box 35 is connected with a finished product alkali liquid pump 41, and the outlet of the pump is divided into two branches: one connected to the chelating resin column 52 and one fed out. The acid liquid tank 32 is connected with an acid liquid pump 38, the acid liquid pump 36 is connected with an acid liquid filter 44, the outlet water of the acid liquid filter 44 is connected with an acid liquid heat exchanger 50, the water outlet pipeline of the heat exchanger is connected with an acid liquid inlet pipeline, after membrane stacking, the acid liquid outlet pipe returns to the top of the acid liquid tank 32, and the acid liquid tank 32 is directly connected with the upper part of the acid finished product tank 33 through a pipeline; the acid finished product box 33 is connected with a finished product acid liquid pump 39, and the outlet of the pump is divided into two branches: one connected to the chelating resin column 52 and one fed out. BPED utmost point water tank 30 links to each other with BPED utmost point water pump 36, and BPED utmost point water pump 36 connects BPED utmost point water filter 42, and BPED utmost point water filter 42 goes out water and links to each other with BPED utmost point water heat exchanger 48, and the heat exchanger outlet conduit links to each other with utmost point water inlet pipe, and behind the membrane stack, utmost point water outlet pipe returns BPED utmost point water tank 30 top. The acid liquor heat exchanger 50, the alkali liquor heat exchanger 51, the BPED polar water heat exchanger 48 and the BPED brine heat exchanger 49 are respectively connected with external condensed water pipelines. The upper parts of the BPED polar water tank 30, the acid liquor tank 32 and the alkali liquor tank 34 are respectively connected with a fresh water outlet of the high-pressure RO membrane module 5. The electrodialysis electric control cabinet 29 and the bipolar membrane electrodialysis electric control cabinet 54 are both provided with LED touch screens.

The working flow of the utility model is as follows.

The high-salt-content wastewater enters a high-pressure RO pipeline mixer 2 after being pre-pressurized by a high-pressure RO pre-pressurizing pump 1, the high-salt-content wastewater enters a high-pressure RO water inlet security filter 4 after being uniformly mixed with a scale inhibitor in the pipeline mixer, the wastewater is primarily filtered, then the wastewater is pumped into a high-pressure RO membrane assembly 5 through a high-pressure RO high-pressure water pump 3, the fresh water of the high-pressure RO enters a solvent dissolving tank 11 of a defluorination system and is used for preparing a defluorination resin regeneration liquid, the rest water is discharged or recycled to other workshop sections of an enterprise, and the concentrated water of the high-pressure RO enters a high-pressure RO concentrated water tank 6.

Concentrated water of the high-pressure RO concentrated water tank is pumped into the top end of the adsorption defluorination column 8 through the adsorption defluorination inlet pump 7, and water flows out from the bottom of the adsorption defluorination column by adopting an upper inlet and lower outlet mode and enters the adsorption defluorination water production tank 9. The wastewater (F < 1m g/L) in the adsorption fluorine removal water production tank 9 is pumped into the electrodialysis fresh water tank 15 through the electrodialysis water inlet pump 10, and the concentrated water in the concentrated water tank 16 is used as the initial inlet water of the chelate resin system. If the adsorption defluorination effluent is more than 1 mg/L, the adsorption defluorination fluororesin needs to be regenerated: the water of the regeneration solution tank 11 is pumped into a regeneration pipeline mixer 12 through a regeneration pump 13, and is uniformly mixed with aluminum sulfate in the mixer and then enters the adsorption defluorination column 8 from bottom to top to regenerate the defluorination resin, the regeneration period is 2 hours, and the regeneration solution is discharged for other treatment.

The electrodialysis polar water adopts electrolyte solution prepared by pure water as initial inlet water. And pumping the water in the fresh water tank 15 into a fresh water filter through a fresh water delivery pump 19 for filtration, then feeding the water into the electrodialysis membrane stack 28 from bottom to top, returning the discharged water to the fresh water tank 15 for circulation, and discharging the water or returning the water to a high-pressure RO system for re-concentration when the concentration of fresh water salt is less than 10 g/L. The water in the concentrated water tank 16 is pumped into a concentrated water filter 22 through a concentrated water delivery pump 20 for filtration, then enters a concentrated water heat exchanger 25 for heat exchange, the temperature of the concentrated water is maintained within the range of 25-35 ℃, the water enters an electrodialysis membrane stack 28 from bottom to top after heat exchange, the effluent returns to the concentrated water tank 16 for circulation, and when the concentration of concentrated water salt is 60-150 g/L, the effluent enters an ion exchange raw water tank 47 of a chelate resin system. Water in the polar water tank is pumped into the polar water filter 23 through the polar water delivery pump 21 to be filtered, then enters the polar water heat exchanger 27 to be subjected to heat exchange, the temperature of the polar water is guaranteed to be maintained within the range of 25-35 ℃, the water enters the electrodialysis membrane stack 28 from bottom to top after the heat exchange, and the discharged water returns to the polar water tank 17 to be circulated. The polar water is replaced every two months under the continuous operation state. The cleaning water tank 14 is mainly used for acid-base cleaning after membrane pollution, acid or alkali liquor produced by introducing a bipolar membrane system is diluted for use (the concentration is 1-2%), and the cleaning water is circulated and cleaned through a membrane stack by a cleaning water pump 18 and a cleaning water filter 24, wherein the general cleaning time is 1-3 hours.

Water in the ion exchange raw water tank 47 is pumped into the chelating resin column 52 from top to bottom through the chelating resin water inlet pump 46 to remove heavy metal ions in the wastewater so as to prevent the pollution of the chelating resin column 52 to the bipolar membrane electrodialysis system, and the effluent of the chelating resin column 52 enters the salt water tank 31 for bipolar membrane electrodialysis after the leaked resin is intercepted by the ion exchange filter 53. Water in the brine tank 31 of the bipolar membrane electrodialysis enters a brine filter 43 through a brine delivery pump 37 to be filtered, enters a bipolar membrane electrodialysis membrane stack 55 from bottom to top after heat exchange 49 (maintaining 25-35 ℃) by a brine heat exchanger, effluent returns to the brine tank 31 to circulate, and returns to the electrodialysis system 28 to be concentrated again when the salt content of the brine tank is less than 30 g/L. An acid liquor tank 32 and an alkali liquor tank 34 of the bipolar membrane electrodialysis are pumped into an acid liquor filter 44 and an alkali liquor 45 filter through an acid liquor pump 38 and an alkali liquor pump 40, then enter an acid liquor 50 heat exchanger and an alkali liquor 51 heat exchanger for heat exchange (at 25-35 ℃) and enter a bipolar membrane electrodialysis membrane stack 55 from bottom to top, effluent returns to the acid liquor tank 32 and the alkali liquor tank 34, and can overflow into an acid finished product tank 33 and an alkali finished product tank 35 after the liquid levels of the acid liquor and the alkali liquor rise to a certain degree, and then are pumped out through a finished product acid liquor pump 39 and a finished product alkali 41 pump or carry out acid-base regeneration on chelate resin. The bipolar membrane electrodialysis pole water tank 30 adopts electrolyte solution prepared by pure water, the electrolyte solution is pumped into a pole water filter through a pole water pump 36 and filtered 42, the electrolyte solution enters a heat exchanger 48 for heat exchange (25-35 ℃) and then enters a bipolar membrane electrodialysis membrane stack 55 from bottom to top, effluent returns to the pole water tank 30 for circulation, and pole water is replaced once every two months. The acid and alkali concentration of the bipolar membrane electrodialysis can reach 5% -10%.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention. The scope of the utility model is defined by the claims and their equivalents.

Claims

1. A device for salt concentration and resource treatment is characterized by comprising a high-pressure reverse osmosis system, an adsorption defluorination system, an electrodialysis system, a chelating resin system and a bipolar membrane electrodialysis system; the high-pressure reverse osmosis system is connected with the adsorption and fluorine removal system, the adsorption and fluorine removal system is connected with the electrodialysis system, the electrodialysis system is connected with the chelate resin system, the chelate resin system is connected with the bipolar membrane electrodialysis system, the electrodialysis system is connected with the high-pressure reverse osmosis system, and the bipolar membrane electrodialysis system is connected with the electrodialysis system.

2. The device of claim 1, wherein the device adopts a skid-mounted integration mode, and is divided into three skid blocks, namely: the high-pressure reverse osmosis system is skid-mounted, the adsorption defluorination system is a skid block, and the electrodialysis system, the chelate resin system and the bipolar membrane electrodialysis system are skid blocks.

3. The apparatus of claim 1 or 2, wherein each system water inlet and outlet of the apparatus is equipped with an automatic conductivity detector.

4. The apparatus of claim 1 or 2 wherein the high pressure reverse osmosis system comprises a high pressure RO pre-booster pump, a high pressure RO line mixer, a high pressure RO feed water guard filter, a high pressure RO high pressure water pump, a high pressure RO membrane module and a high pressure RO concentrate tank; wherein the inlet of the high-pressure RO pre-booster pump is connected with a high-saline water inlet pipeline, and the outlet of the high-pressure RO pre-booster pump is connected with a high-pressure RO pipeline mixer; the top of the high-pressure RO pipeline mixer is connected with a scale inhibitor feeding pipeline, and the outlet of the high-pressure RO pipeline mixer is connected with the water inlet of the high-pressure RO water inlet security filter; the high-pressure RO water inlet security filter is connected with a high-pressure RO high-pressure water pump, the outlet of the high-pressure RO high-pressure water pump is connected with a high-pressure RO membrane component, and the concentrated water port of the membrane component is connected with the top of a high-pressure RO concentrated water tank.

5. The device according to claim 4, wherein the adsorption defluorination system comprises an adsorption defluorination inlet pump, an adsorption defluorination column, an adsorption defluorination water production tank, a regeneration dissolving tank, a regeneration pump and a regeneration pipeline mixer; the water inlet of the adsorption defluorination water inlet pump is connected with the bottom of the high-pressure RO concentrated water tank, the outlet of the adsorption defluorination water inlet pump is connected with the top of the adsorption defluorination column, and the outlet of the bottom of the adsorption defluorination column is connected with the top of the adsorption defluorination water production tank; the top of the regeneration solvent box is connected with a fresh water outlet of the high-pressure RO membrane component, and the bottom of the regeneration solvent box is connected with a water inlet of the regeneration pump; the outlet of the regeneration pump is connected with a regeneration pipeline mixer, and the water outlet of the regeneration pipeline mixer is connected with the bottom of the adsorption defluorination column.

6. The device of claim 5, wherein the electrodialysis system comprises an electrodialysis water inlet pump, an electrodialysis device, a concentrated water tank, a fresh water tank, an ED polar water tank, a cleaning water tank, a concentrated water delivery pump, a fresh water delivery pump, a polar water delivery pump, a cleaning water pump, a fresh water filter, a concentrated water filter, an ED polar water filter, a cleaning water filter, a concentrated water heat exchanger, an ED polar water heat exchanger and an electrodialysis electric control cabinet; the inlet of the electrodialysis water inlet pump is connected with the adsorption defluorination water production tank, and the outlet of the electrodialysis water inlet pump is connected with the electrodialysis device; the electrodialysis device consists of a membrane stack and a power supply, wherein four pipelines are led out from the membrane stack, namely a fresh water pipeline, a concentrated water pipeline, an electrode water pipeline and a cleaning pipeline, and each pipeline enters from the bottom of the ED membrane stack and discharges water from the top; the fresh water tank is connected with the fresh water delivery pump, and the fresh water delivery pump is connected with the fresh water filter, and the fresh water filter goes out water and links to each other with the fresh water inlet pipe way, and behind the membrane stack, the fresh water outlet pipe way divide into two: one returns to the top of the fresh water tank, and the other reaches the standard and is discharged or recycled; the concentrated water tank is connected with a concentrated water delivery pump, the concentrated water delivery pump is connected with a concentrated water filter, the outlet water of the concentrated water filter is connected with a concentrated water heat exchanger, the outlet pipe of the heat exchanger is connected with a concentrated water inlet pipe, after membrane stacking, the concentrated water outlet pipe is divided into two branches, one branch returns to the top of the concentrated water tank, and the other branch enters a chelate resin system; the ED polar water tank is connected with a polar water delivery pump, the polar water delivery pump is connected with a polar water filter, the outlet water of the polar water filter is connected with a polar water heat exchanger, a water outlet pipeline of the heat exchanger is connected with a polar water inlet pipeline, and after passing through a membrane stack, the polar water outlet pipeline returns to the top of the ED polar water tank; the concentrated water heat exchanger and the ED polar water heat exchanger are respectively connected with an external condensed water pipeline; the cleaning water tank is connected with the cleaning water pump, the cleaning water pump is connected with the cleaning water filter, the water outlet of the cleaning water filter is connected with the cleaning water inlet pipeline, and the cleaning water outlet pipeline returns to the top of the cleaning water tank after passing through the membrane stack.

7. The apparatus of claim 6, wherein the chelating resin system comprises an ion exchange raw water tank, a chelating resin feed pump, a chelating resin column, an ion exchange filter; an inlet of an ion exchange raw water tank is connected with a concentrated water outlet pipeline of the electrodialysis system, an outlet of the ion exchange raw water tank is connected with an inlet of a chelate resin water inlet pump, an outlet of the chelate resin water inlet pump is connected with the top of a chelate resin column, the bottom of the chelate resin column is connected with an ion exchange filter, and a water outlet of the ion exchange filter is connected with the bipolar membrane electrodialysis system; the regenerated acid and alkali of the chelating resin column come from a bipolar membrane electrodialysis system, a pipeline of the bipolar membrane electrodialysis system enters from the top of the chelating resin column, and water flows out from the bottom of the chelating resin column.

8. The apparatus of claim 7, wherein the bipolar membrane electrodialysis system comprises a bipolar membrane electrodialysis device, a BPED brine tank, a BPED pole water tank, an acid liquid tank, an alkali liquid tank, an acid finished product tank, a base finished product tank, a BPED pole water pump, a BPED brine pump, an acid liquid pump, an alkali liquid pump, a finished acid liquid pump, a finished alkali liquid pump, a BPED pole water filter, a BPED brine filter, an acid liquid filter, an alkali liquid filter, an acid liquid heat exchanger, an alkali liquid heat exchanger, a BPED pole water heat exchanger, a BPED brine heat exchanger, and a bipolar membrane electrodialysis electric cabinet; the bipolar membrane electrodialysis device consists of a membrane stack and a power supply, wherein four pipelines are led out from the membrane stack: the system comprises a salt water pipeline, an acid production pipeline, an alkali production pipeline and an electrode water pipeline, wherein each pipeline enters from the bottom of a BPED membrane stack, and water is discharged from the top; BPED brine tank links to each other with BPED brine pump, and BPED brine pump connects BPED brine filter, and BPED brine filter outlet water links to each other with BPED brine heat exchanger, and the heat exchanger outlet conduit links to each other with the salt water inlet pipe way, and behind the membrane stack, salt water outlet pipe way divide into two: one returns to the top of the BPED brine tank, and the other returns to the fresh water tank of the electrodialysis system; the alkali liquor tank is connected with an alkali liquor pump, the alkali liquor pump is connected with an alkali liquor filter, the outlet water of the alkali liquor filter is connected with an alkali liquor heat exchanger, the outlet pipeline of the heat exchanger is connected with an alkali liquor inlet pipeline, after membrane stacking, an alkali liquor outlet pipe returns to the top of the alkali liquor tank, and the alkali liquor tank is directly connected with the upper part of an alkali finished product tank by a pipeline; the alkali finished product box is connected with a finished product alkali liquid pump, and the outlet of the pump is divided into two branches: one is connected with the chelating resin column, and the other is sent out; the acid liquid tank is connected with an acid liquid pump, the acid liquid pump is connected with an acid liquid filter, the outlet water of the acid liquid filter is connected with an acid liquid heat exchanger, the outlet pipe of the heat exchanger is connected with the acid liquid inlet pipe, after membrane stacking, the acid liquid outlet pipe returns to the top of the acid liquid tank, and the acid liquid tank is directly connected with the upper part of the acid finished product tank by a pipeline; the acid finished product box is connected with a finished product acid liquid pump, and the outlet of the pump is divided into two branches: one is connected with the chelating resin column, and the other is sent out; the BPED polar water tank is connected with a BPED polar water pump, the BPED polar water pump is connected with a BPED polar water filter, the outlet water of the BPED polar water filter is connected with a BPED polar water heat exchanger, a water outlet pipeline of the heat exchanger is connected with a polar water inlet pipeline, and after passing through a membrane stack, the polar water outlet pipeline returns to the top of the BPED polar water tank; the acid liquor heat exchanger, the alkali liquor heat exchanger, the BPED polar water heat exchanger and the BPED brine heat exchanger are respectively connected with an external condensed water pipeline; the upper parts of the BPED water tank, the acid liquid tank and the alkali liquid tank are respectively connected with a fresh water outlet of the high-pressure RO membrane assembly.

9. The device of claim 8, wherein the electrodialysis electric control cabinet and the bipolar membrane electrodialysis electric control cabinet are both provided with LED touch screens.