Ion exchange water production regeneration wastewater pretreatment device and method

Abstract

The invention relates to the technical field of wastewater retreatment, and provides an ion exchange water production regeneration wastewater pretreatment device and method. The ion exchange water-making regenerated wastewater pretreatment device comprises a normal-temperature crystallization reactor, a sedimentation tank, a filter assembly, an ion exchange assembly and a strong oxidizer. The normal-temperature crystallization reactor is used for crystallizing and separating part of impurities in the regenerated wastewater; the settling pond is communicated with the normal-temperature crystallization reactor and is used for settling and purifying the crystallized regenerated wastewater; the filtering assembly is communicated with the settling pond and is used for filtering the settled and purified regenerated wastewater; the ion exchange assembly is communicated with the filtering assembly and is used for removing calcium and magnesium ions in the regenerated wastewater; the strong oxidizer is communicated with the ion exchange assembly and is used for killing microorganisms in the regenerated wastewater. The method can be used for treating most impurity ions except sodium chloride and sodium sulfate in the ion exchange water-making regeneration wastewater.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater reprocessing, and in particular to a device and method for pretreating ion exchange water regeneration wastewater. Background Art

[0002] Ion exchange water production technology is one of the current methods for industrial production of desalted water. The principle of water production is to use resin ion exchange to adsorb other anions and cations in the water. After the adsorption is saturated, acid and alkali are used for desorption and regeneration. The ion exchange pure water production rate is above 95%.

[0003] The quality of ion exchange water regeneration wastewater is very complex and needs to be treated before discharge. The current method is to use the regeneration wastewater for blast furnace slag and power plant fly ash treatment, while blast furnace slag, converter slag and power plant fly ash can be used in concrete production.

[0004] However, the chloride ion content in the ion exchange water regeneration wastewater is too high, which affects the quality of the water slag used in lime production. Therefore, it is necessary to treat the ion exchange water regeneration wastewater. Before treating the regeneration wastewater, most of the impurity ions in the regeneration wastewater except sodium chloride and sodium sulfate need to be treated. Therefore, it is necessary to design an ion exchange water regeneration wastewater pretreatment device and method. Summary of the invention

[0005] The invention provides an ion exchange water regeneration wastewater pretreatment device and method, which are used to treat most of the impurity ions except sodium chloride and sodium sulfate in the ion exchange water regeneration wastewater.

[0006] The present invention provides an ion exchange water regeneration wastewater pretreatment device comprising: Normal temperature crystallization reactor, used to separate some impurities in the regenerated wastewater by crystallization; A sedimentation tank, connected to the normal temperature crystallization reactor, used for precipitating and purifying the regenerated wastewater after crystallization; A filtering component, connected to the sedimentation tank, for filtering the regenerated wastewater after sedimentation purification; an ion exchange component, connected to the filter component, for removing calcium and magnesium ions from the regenerated wastewater; A strong oxidizer is communicated with the ion exchange component and is used to kill microorganisms in the regenerated wastewater.

[0007] According to an ion exchange water production regeneration wastewater pretreatment device provided by the present invention, the sedimentation tank comprises: A sedimentation shell, with a chamber inside, for sedimenting the regenerated wastewater; A sedimentation component, having a sedimentation chamber inside and arranged at the top of the chamber, the sedimentation component is used to precipitate impurities on the top of the regenerated wastewater; A cleaning component, provided in the sedimentation shell, for cleaning the sediment at the bottom of the cavity; An external water receiving tank is connected to the sedimentation chamber and is used to guide the liquid after sedimentation in the sedimentation chamber; The first water production pipe is connected to the external water receiving tank.

[0008] According to an ion exchange water regeneration wastewater pretreatment device provided by the present invention, the precipitation shell comprises: A shell body, wherein the cavity is located inside the shell body, and an opening is provided on the top of the shell body; a toothed weir, disposed at one end of the opening; A water distribution trough is arranged outside the toothed weir, and the bottom end of the water distribution trough is lower than the top end of the toothed weir; A first water inlet pipe is connected to a side of the water distribution trough away from the toothed weir; A mud discharge pipe is arranged at the bottom end of the shell body and is used for discharging sediment.

[0009] According to an ion exchange water regeneration wastewater pretreatment device provided by the present invention, the precipitation component comprises: A support plate is provided at one end of the opening away from the toothed weir, and the support plate and the inner wall of the shell body form the sedimentation chamber; A plurality of inclined tubes are obliquely arranged at the bottom of the sedimentation chamber, and the bottom ends of the inclined tubes are communicated with the containing chamber; At least one internal water receiving tank, disposed at the top of the inclined tube, the internal water receiving tank being in communication with the external water receiving tank; At least one bearing platform is arranged on the top of the supporting plate.

[0010] According to an ion exchange water regeneration wastewater pretreatment device provided by the present invention, the cleaning component comprises: A motor, arranged on the supporting platform; A rotating rod connected to the output shaft of the motor, wherein the bottom end of the rotating rod extends toward the bottom end of the cavity; The scraper is arranged at the bottom end of the rotating rod and is used to stir the sediment at the bottom end of the cavity so that the sediment is discharged through the mud discharge pipe.

[0011] According to an ion exchange water production and regeneration wastewater pretreatment device provided by the present invention, the ion exchange component includes an exchange shell; The interior of the exchange shell is provided with a first filter plate, a second filter plate and a third filter plate in sequence from top to bottom, and the first filter plate, the second filter plate and the third filter plate divide the interior of the exchange shell into a first cavity, a second cavity, a third cavity and a fourth cavity; The first filter plate is provided with a plurality of first single-sided filter caps, the second filter plate is provided with a plurality of double-sided filter caps, and the third filter plate is provided with a plurality of second single-sided filter caps; The third cavity is provided with a weak acid cation resin layer and a white ball resin grease layer in sequence from bottom to top, and a gap is provided between the white ball resin grease layer and the second filter plate; The second cavity is provided with a chelating resin layer and the white ball resin fat pressing layer in order from bottom to top, and a gap is provided between the white ball resin fat pressing layer and the first filter plate; At least one layer of porous plate is arranged inside the first filter plate.

[0012] According to an ion exchange water regeneration wastewater pretreatment device provided by the present invention, the strong oxidizer comprises: The tubular reactor has a water inlet and a dosing port which are connected to each other, wherein the water inlet is connected to a water supply component, and the dosing port is connected to a hydrogen peroxide dosing component through an ejector; An oxidation water tank, having a water inlet, a water outlet and an overflow port, wherein the water inlet is connected to the tubular reactor, the water outlet is connected to a circulating water pump, the circulating water pump is connected to a pipeline injector, the negative pressure port of the pipeline injector is connected to an ozone generator, and the outlet of the pipeline injector is connected to the water supply component; The oxygen release box is connected with the overflow port and is provided with a nitrogen explosion component inside. The first outlet of the oxygen release box is connected with a lift pump, and the second outlet of the oxygen release box is connected with a tail gas absorber.

[0013] According to an ion exchange water regeneration wastewater pretreatment device provided by the present invention, the tubular reactor comprises a plurality of direct-flow sections and a plurality of arc-shaped connecting pipes, and the plurality of direct-flow sections are connected end to end through the arc-shaped connecting pipes; The direct current section comprises a water inlet pipe and a filler reaction tube which are connected in sequence. The filler reaction tube is sleeved with at least one reagent injection pipe which is communicated with the filler reaction tube.

[0014] According to an ion exchange water production regeneration wastewater pretreatment device provided by the present invention, the filter component includes a precision filter, a self-cleaning filter and an ultrafiltration component which are connected in sequence.

[0015] The present invention further provides a method for pretreating ion exchange water regeneration wastewater, which is implemented based on the ion exchange water regeneration wastewater pretreatment device described in any one of the above embodiments. The method for pretreating ion exchange water regeneration wastewater comprises: Part of the impurities in the regeneration wastewater are crystallized and separated by the normal temperature crystallization reactor; Purify the crystallized regenerated wastewater by precipitation in the sedimentation tank; Filtering the regenerated wastewater after precipitation purification through the filtering component; Removing calcium and magnesium ions from the regeneration wastewater by means of the ion exchange component; The microorganisms in the regeneration wastewater are killed by the strong oxidizer.

[0016] The ion exchange water regeneration wastewater pretreatment device provided by the present invention can promote the crystallization of impurities through a normal temperature crystallization reactor, and can remove calcium and magnesium ions, heavy metals, total silicon and some organic and inorganic reducing substances; effective precipitation can be completed through a sedimentation tank, and the effect of fine filtration can be achieved through a filtering component. The calcium and magnesium ions can be completely removed through an ion exchange component, and microorganisms can be inactivated through a strong oxidizer. The entire process is closely connected, and each link is prepared for the next link. The collaborative work between the components not only solves the problem of excessive impurity ions in the regeneration wastewater, but also ensures the effectiveness and economy of the treatment process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a system structure diagram of the ion exchange water production and regeneration wastewater pretreatment device provided by the present invention.

[0019] Figure 2 It is a cross-sectional view of a sedimentation tank of an ion exchange water production and regeneration wastewater pretreatment device provided by the present invention.

[0020] Figure 3 It is a top view of the sedimentation tank of the ion exchange water production and regeneration wastewater pretreatment device provided by the present invention.

[0021] Figure 4 It is a cross-sectional view of the ion exchange component of the ion exchange water production and regeneration wastewater pretreatment device provided by the present invention.

[0022] Figure 5 It is a schematic diagram of the structure of the strong oxidizer of the ion exchange water regeneration wastewater pretreatment device provided by the present invention.

[0023] Figure 6It is a structural schematic diagram of a tube-in-tube reactor of an ion exchange water production and regeneration wastewater pretreatment device provided by the present invention.

[0024] Figure 7 It is a working principle diagram of the ion exchange water production and regeneration wastewater pretreatment device provided by the present invention.

[0025] Reference numerals: 110: wastewater regulating tank; 120: normal temperature crystallization reactor; 130: sedimentation tank; 140: precision filter; 150: self-cleaning filter; 160: ultrafiltration component; 170: ion exchange component; 180: strong oxidizer; 190: ultrafiltration water production tank; 131: sedimentation shell; 1311: shell body; 1312: first water inlet pipe; 1313: water distribution tank; 1314: toothed weir; 1315: mud discharge pipe; 132: sedimentation component; 1321: support plate; 1322: inclined pipe; 1323: internal water collection tank; 1324: bearing platform; 133: cleaning component; 1331: motor; 1332: rotating rod; 1333: scraper; 134: external water receiving tank; 135: first water production pipe; 1711: exchange housing; 1712: first filter plate; 1713: second filter plate; 1714: third filter plate; 1721: first cavity; 1722: second cavity; 1723: third cavity; 1724: fourth cavity; 1731: first single-sided filter cap; 1732: double-sided filter cap; 1733: second single-sided filter cap; 174: second water inlet pipe; 175: baffle; 176: porous plate; 177: second water production pipe; 1781: weak acid cation resin layer; 1782: white ball resin grease layer; 1783: chelating resin layer; 181: tube reactor; 1811: water inlet pipe; 1812: packing reaction tube; 1813: reagent input pipe; 1814: arc connecting pipe; 182: oxidation water tank; 1821: water supply component; 1822: ozone generator; 1823: pipeline ejector; 1824: circulating water pump; 183: oxygen release tank; 1831: nitrogen explosion component; 1832: lifting pump; 1833: tail gas absorber; 184: ejector; 185: hydrogen peroxide dosing component. DETAILED DESCRIPTION

[0026] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0027] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0028] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" 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. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0029] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0031] Combine the following Figure 1-Figure 7 The structure and working principle of the present invention are described.

[0032] Reference Figure 1 The present invention provides an ion exchange water regeneration wastewater pretreatment device, which includes a normal temperature crystallization reactor 120, a sedimentation tank 130, a filter assembly, an ion exchange assembly 170, and a strong oxidizer 180. The normal temperature crystallization reactor 120 is used to crystallize and separate some impurities in the regeneration wastewater; the sedimentation tank 130 is connected to the normal temperature crystallization reactor 120, and is used to precipitate and purify the regeneration wastewater after crystallization; the filter assembly is connected to the sedimentation tank 130, and is used to filter the regeneration wastewater after precipitation and purification; the ion exchange assembly 170 is connected to the filter assembly, and is used to remove calcium and magnesium ions in the regeneration wastewater; the strong oxidizer 180 is connected to the ion exchange assembly 170, and is used to kill microorganisms in the regeneration wastewater.

[0033] Specifically, the regenerated wastewater enters the normal temperature crystallization reactor 120, and by adding alkali solution, sodium carbonate, seed crystals and other reagents into the normal temperature crystallization reactor 120, the alkali solution ensures that the pH value of the entire reactor is greater than 11.5, and calcium carbonate, magnesium hydroxide, and metal hydroxide crystals are generated. The normal temperature crystallization reactor 120 consists of a water inlet circulation part, a chemical reaction center area, a slag particle discharge system and a precipitation clarification part. The special crystal growth mechanism design enables the crystals to grow rapidly and fully, and impurity ions such as calcium and magnesium react fully. There is no need to add flocculants (which will increase other impurities), and the crystals are self-screened and discharged from the body to complete the treatment. At this stage, more than 97% of calcium and magnesium ions, more than 99% of heavy metals, 100% of total silicon, and more than 75% of organic and inorganic reducing substances can be removed.

[0034] The regenerated wastewater treated by the normal temperature crystallization reactor 120 flows naturally to the sedimentation tank 130 by utilizing the height difference. In the sedimentation tank 130, the heavier crystal particles will settle to the bottom due to gravity, thereby achieving preliminary solid-liquid separation. The wastewater purified by sedimentation continues to flow to the filter assembly, where finer suspended matter is intercepted to further purify the water quality.

[0035] Next, the wastewater treated as above flows into the ion exchange assembly 170, which thoroughly removes heavy metal ions such as calcium and magnesium in the wastewater. This step is crucial for subsequent treatment because the presence of heavy metal ions such as calcium and magnesium may affect the quality of the final water or cause damage to subsequent equipment. Finally, the strong oxidizer 180 is connected after the ion exchange assembly 170. Its function is to inactivate microorganisms in the wastewater through strong oxidation to ensure the biological safety of the treated water.

[0036] The present invention promotes the crystallization of impurities through the normal temperature crystallization reactor 120, and can remove more than 97% of calcium and magnesium ions, more than 99% of heavy metals, 100% of total silicon, and more than 75% of organic and inorganic reducing substances; effective precipitation can be completed through the sedimentation tank 130, and the effect of fine filtration can be achieved through the filtering component. The calcium and magnesium ions can be completely removed through the ion exchange component 170, and microorganisms can be inactivated through the strong oxidizer 180. The entire process is closely connected, and each link is prepared for the next link. The collaborative work between the components not only solves the problem of excessive impurity ions in the regenerated wastewater, but also ensures the effectiveness and economy of the treatment process.

[0037] In some possible embodiments, the present invention further includes a wastewater regulating tank 110 and an ultrafiltration water production tank 190. The wastewater regulating tank 110 is arranged in the previous link of the normal temperature crystallization reactor 120, that is, the regenerated wastewater first passes through the wastewater regulating tank 110 before entering the normal temperature crystallization reactor 120. The wastewater regulating tank 110 has a certain water quantity and water quality balance adjustment function, is equipped with a high and low level gauge, and is equipped with an alkali solution dosing device, a pneumatic stirring device, and a temperature regulating cooling water facility. The cooling water equipment controls the inlet water temperature at a lower level, which is beneficial to the crystallization mechanism of the normal temperature crystallizer. The ultrafiltration water production tank 190 is arranged in the next link of the strong oxidizer 180, that is, the regenerated wastewater treated by the strong oxidizer 180 enters the ultrafiltration water production tank 190 for storage for the next link.

[0038] Reference Figure 2 and Figure 3 In some embodiments of the present invention, the sedimentation tank 130 includes a sedimentation shell 131, a sedimentation component 132, a cleaning component 133, an external water receiving tank 134 and a first water production pipe 135. The sedimentation shell 131 is provided with a chamber inside for sedimentation of the regenerated wastewater; the sedimentation component 132 has a sedimentation chamber inside and is arranged at the top of the chamber, and the sedimentation component 132 is used to precipitate impurities on the top of the regenerated wastewater; the cleaning component 133 is arranged in the sedimentation shell 131, and is used to clean the sediment at the bottom of the chamber; the external water receiving tank 134 is connected to the sedimentation chamber, and is used to guide the liquid after sedimentation in the sedimentation chamber; the first water production pipe 135 is connected to the external water receiving tank 134.

[0039] Specifically, the sedimentation shell 131 constitutes the basic framework of the sedimentation tank 130, and a cavity is provided inside the sedimentation shell, which provides necessary space for the regenerated wastewater to complete the sedimentation process. In order to improve the sedimentation efficiency, the sedimentation component 132 is arranged at the top of the cavity, and has a sedimentation cavity inside, which is specifically used to effectively precipitate the impurities on the top of the regenerated wastewater entering the sedimentation tank 130. When the wastewater flows into the sedimentation component 132, the lighter impurities will gradually settle in the sedimentation cavity, while the clearer water will continue to flow down to the cavity of the sedimentation shell 131.

[0040] In order to further improve the automation and maintenance convenience of the system, a cleaning component 133 is provided on the sedimentation housing 131, which can clean the sediment accumulated at the bottom of the chamber regularly or as needed. This design not only helps to maintain the long-term stable operation of the sedimentation tank 130, but also reduces the need for manual intervention and improves the overall operating efficiency.

[0041] In the above structure, the external water receiving tank 134 is connected to the sedimentation chamber of the sedimentation component 132, and its main function is to guide the liquid after preliminary sedimentation to flow out, ensuring smooth water flow while also preventing impurities that are not completely precipitated from being carried out. The first water production pipe 135 is connected to the external water receiving tank 134 and is responsible for guiding the purified water out of the sedimentation tank 130, thereby effectively improving the water quality.

[0042] The present invention effectively solves the problem that it is difficult to simultaneously and efficiently treat top impurities and bottom sediments in the regenerated wastewater through close cooperation between the components of the sedimentation tank 130. The design of the sedimentation tank 130 ensures that when the regenerated wastewater flows through this stage, the top suspended impurities can be fully removed and the bottom sediments can be cleaned in time, thereby providing better water inlet conditions for subsequent treatment steps.

[0043] Reference Figure 2 and Figure 3 In some embodiments of the present invention, the sedimentation shell 131 includes a shell body 1311, a first water inlet pipe 1312, a water distribution trough 1313, a toothed weir 1314 and a mud discharge pipe 1315. The shell body 1311 can be a rectangular parallelepiped structure, and its bottom is funnel-shaped, which is convenient for collecting sediments. The cavity is located inside the shell body 1311, and an opening is provided at the top of the shell body 1311; the toothed weir 1314 is provided at the left end of the opening; the water distribution trough 1313 is provided outside the toothed weir 1314, and the bottom end of the water distribution trough 1313 is lower than the top end of the toothed weir 1314; the first water inlet pipe 1312 is connected to the side of the water distribution trough 1313 away from the toothed weir 1314; the mud discharge pipe 1315 is used for discharging sediments, and is connected to the bottom end of the shell body 1311, and is located at the lowest part of the funnel structure, which is convenient for discharging sediments.

[0044] Specifically, the water distribution trough 1313 is arranged outside the toothed weir 1314, and its bottom end is lower than the top of the toothed weir 1314. This height difference enables the regenerated wastewater entering from the first water inlet pipe 1312 to be fully dispersed in the water distribution trough 1313, and the toothed weir 1314 can withstand the impact of the regenerated wastewater, eliminate the potential energy of the water inlet and evenly distribute the water. The regenerated wastewater then flows into the cavity through the toothed weir 1314 in a relatively gentle manner. Such an arrangement helps to reduce the impact of the water inlet on the inside of the cavity and ensure the stability of the sedimentation process. The first water inlet pipe 1312 is connected to the side of the water distribution trough 1313 away from the toothed weir 1314, ensuring that the regenerated wastewater entering the system first passes through the distribution of the water distribution trough 1313, thereby achieving uniform water inlet. The mud discharge pipe 1315 is arranged at the bottom of the shell body 1311, which is used to discharge the sediment deposited at the bottom of the cavity in time to prevent the sediment from accumulating and affecting the treatment efficiency.

[0045] In the above structure, this embodiment solves the problem that it is difficult to effectively precipitate suspended matter in regenerated wastewater. Through the cooperation of the water distribution trough 1313 and the toothed weir 1314, the uniform distribution of the regenerated wastewater is achieved, the turbulence phenomenon is reduced, and the rapid sedimentation of larger particles is promoted. At the same time, the existence of the mud discharge pipe 1315 ensures that the sediment will not be retained at the bottom of the cavity for a long time, maintaining the continuous and efficient operation of the system. In addition, the opening at the top of the shell body 1311 combined with the design of the toothed weir 1314 not only simplifies the structure, but also improves the convenience of operation and maintenance, ensuring the smooth progress of the entire sedimentation process.

[0046] Reference Figure 2 and Figure 3 In some embodiments of the present invention, the sedimentation component 132 includes a support plate 1321, a plurality of inclined tubes 1322, at least one internal water collecting tank 1323 and at least one bearing platform 1324. The support plate 1321 is fixedly mounted at one end of the opening away from the toothed weir 1314, that is, at the right end of the opening, and the top end of the support plate 1321 is flush with the top end of the opening. There is no specific restriction on the shape of the support plate 1321, as long as the support plate 1321 and the inner wall of the inclined tube 1322 form a cavity, which can be used as a sedimentation chamber; multiple inclined tubes 1322 are fixedly arranged at an angle at the bottom of the sedimentation chamber, and the angle between the inclined tube 1322 and the bottom end of the inclined tube 1322 can be 60 degrees, and the bottom end of the inclined tube 1322 is connected to the cavity inside the inclined tube 1322; the internal water collecting trough 1323 is arranged at the top of the inclined tube 1322, and the internal water collecting trough 1323 is connected to the external water receiving trough 134; the supporting platform 1324 is fixed or detachably arranged at the top of the support plate 1321, and its function is to install the cleaning component 133.

[0047] In the above structure, when the regenerated wastewater enters the internal cavity through the opening of the shell body 1311, it undergoes preliminary sedimentation, and the liquid at the top enters the sedimentation cavity through the inclined tube 1322. According to the principle of shallow sedimentation, the suspended matter is precipitated on the surface of the inclined tube 1322. When the sedimentation layer accumulates to a certain thickness, it will fall to the bottom of the internal cavity of the shell body 1311 according to its own gravity.

[0048] The inclined tube 1322 is fixedly arranged at the bottom of the sedimentation chamber, and the angle between the inclined tube 1322 and the bottom end of the inclined tube 1322 is 60 degrees. This design increases the effective sedimentation area, so that the suspended particles in the wastewater can settle to the bottom of the inclined tube 1322 more quickly, and then be discharged smoothly through the cavity inside the inclined tube 1322. This structure not only improves the sedimentation efficiency, but also reduces the possibility of the sediment being stirred again.

[0049] The internal water collecting tank 1323 is arranged at the top of the inclined tube 1322, and the internal water collecting tank 1323 is connected with the external water receiving tank 134. In this way, the relatively clear water after the sedimentation treatment can flow smoothly into the external water receiving tank 134, and further flow to the subsequent treatment unit or the discharge system. The supporting platform 1324 is fixed or detachably arranged at the top of the supporting plate 1321, which can ensure the stable installation of the cleaning component 133, and also provide the flexibility of maintenance and replacement, so that the operator can perform the cleaning work according to the needs.

[0050] Reference Figure 2 and Figure 3 In some embodiments of the present invention, the cleaning component 133 includes a motor 1331, a rotating rod 1332 and a scraper 1333. The motor 1331 is detachably mounted on the support platform 1324 by means of bolts or the like; the rotating rod 1332 is spline-connected to the output shaft of the motor 1331, and the bottom end of the rotating rod 1332 extends toward the bottom end of the cavity; the scraper 1333 is mounted at the bottom end of the rotating rod 1332 by welding or bolt connection, and is used to stir the sediment at the bottom end of the cavity so that the sediment is discharged through the mud discharge pipe 1315. It should be noted that the scraper 1333 is adapted to the shape of the bottom end of the shell body 1311, so that the scraper 1333 can ensure normal rotation while uniformly stirring the sediment at the bottom end of the shell body 1311, so that the sediment gathers toward the mud discharge pipe 1315.

[0051] The cleaning component 133 is designed to ensure effective cleaning of the sediment inside the sedimentation housing 131 to prevent it from accumulating at the bottom of the chamber, thereby affecting the processing efficiency and the long-term operating performance of the equipment. The motor 1331 is detachably mounted on the support platform 1324 by bolts or the like. This mounting method ensures the stability of the motor 1331 and facilitates maintenance and replacement.

[0052] The rotating rod 1332 and the output shaft of the motor 1331 are spline-connected to ensure the reliability of power transmission. The bottom end of the rotating rod 1332 extends to the bottom end of the cavity to transmit the power of the motor 1331 to the bottom of the cavity. The scraper 1333 is arranged at the bottom end of the rotating rod 1332 by welding or bolting, and is used to stir the sediment at the bottom end of the cavity. In order to ensure that the scraper 1333 can effectively perform the cleaning work, its shape is adapted to the shape of the bottom end of the shell body 1311, which not only enables the scraper 1333 to rotate normally, but also can evenly stir the sediment at the bottom end of the shell body 1311, so that the sediment gathers to the mud discharge pipe 1315 and is discharged smoothly.

[0053] In the above structure, the cooperation between the components of the cleaning part 133 solves the problem that the sediment is difficult to remove effectively. The motor 1331 provides power and transmits the rotational motion to the scraper 1333 through the rotating rod 1332, so that the scraper 1333 can stir the sediment according to the predetermined path. Since the design of the scraper 1333 matches the shape of the bottom end of the shell body 1311, it can cover the entire bottom area during the rotation process, ensuring that all sediment can be stirred and moved toward the mud discharge pipe 1315. This process avoids the long-term accumulation of sediment at the bottom of the cavity, reduces the need for manual cleaning, and improves the automation and operational stability of the system.

[0054] In addition, through such a design, the cleaning component 133 also ensures that the sedimentation tank 130 can continue to operate efficiently and maintain a good water quality treatment effect, while simplifying the maintenance procedures and enhancing the reliability and ease of operation of the system.

[0055] Reference Figure 4 In some embodiments of the present invention, the ion exchange assembly 170 includes an exchange shell 1711. Specifically, the exchange shell 1711 is a round tank-shaped structure, and the inner wall is provided with a rubber lining anti-corrosion layer. The top of the exchange shell 1711 is provided with a second water production pipe 177, the bottom is provided with a second water inlet pipe 174, and the top of the second water inlet pipe 174 located at one end inside the exchange shell 1711 is provided with a baffle 175.

[0056] The interior of the exchange housing 1711 is provided with a first filter plate 1712, a second filter plate 1713 and a third filter plate 1714 in order from top to bottom, and the first filter plate 1712, the second filter plate 1713 and the third filter plate 1714 divide the interior of the exchange housing 1711 into a first cavity 1721, a second cavity 1722, a third cavity 1723 and a fourth cavity 1724; the first filter plate 1712 is provided with a plurality of first single-sided filter caps 1731, the second filter plate 1713 is provided with a plurality of double-sided filter caps 1732, and the third filter plate 1714 is provided with a plurality of second single-sided filter caps 1733. It should be noted that the first single-sided filter cap 1731, the double-sided filter cap 1732 and the second single-sided filter cap 1733 are all set with dual flow rates, that is, when the flow rate is downward, the damping device provided will reduce the flow rate, while when the flow rate is upward, the flow rate is not affected.

[0057] The interior of the third cavity 1723 is provided with a weak acid cationic resin layer 1781 and a white ball resin compressed fat layer 1782 (the thickness of the white ball resin compressed fat layer 1782 can be about 200 mm) in sequence from bottom to top, and a gap is provided between the white ball resin compressed fat layer 1782 and the second filter plate 1713 (the thickness of the gap can be about 100 mm), and the gap is reserved for the expansion of the white ball resin compressed fat layer 1782; the interior of the second cavity 1722 is provided with a chelating resin layer 1783 and a white ball resin compressed fat layer 1782 (the thickness of the white ball resin compressed fat layer 1782 can be about 200 mm) in sequence, and a gap is provided between the white ball resin compressed fat layer 1782 and the first filter plate 1712 (the thickness of the gap can be about 100 mm), and the gap is reserved for the expansion of the white ball resin compressed fat layer 1782; at least one layer of porous plate 176 is provided inside the first filter plate 1712.

[0058] In this embodiment, first, the regenerated wastewater enters the bottom of the exchange shell 1711 through the second water inlet pipe 174 , and the potential energy of the incoming water is eliminated by the baffle 175 , so that the incoming water is evenly distributed on the third filter plate 1714 .

[0059] Subsequently, the wastewater flows upward and enters the third chamber 1723 through the second single-sided filter cap 1733, where the wastewater begins to contact the weak acid cation resin layer 1781. The weak acid cation resin layer 1781 is used to adsorb calcium and magnesium ions of equal alkalinity in the water to perform a preliminary ion exchange process. As the wastewater continues to rise, it passes through the white ball resin grease layer 1782, which is located above the weak acid cation resin layer 1781 and has a gap with the second filter plate 1713. The main function of the white ball resin grease layer 1782 is to maintain the stability and integrity of the weak acid cation resin layer 1781 and prevent the loss of resin particles.

[0060] The wastewater then flows into the second cavity 1722 through the double-sided filter cap 1732, and further passes through the chelating resin layer 1783. This layer further adsorbs and exchanges calcium and magnesium heavy metal ions. Similarly, after passing through the chelating resin layer 1783, the wastewater will again encounter the white ball resin grease layer 1782, which is also provided with a gap between the first filter plate 1712 to ensure smooth water flow and stable resin layer.

[0061] As the wastewater continues to move upward, it passes through the first single-sided filter cap 1731 and enters the first cavity 1721, where the water flow path is affected by the porous plate 176 provided inside the first filter plate 1712. The porous plate 176 eliminates the potential energy of the wastewater, making it more evenly distributed, and finally flows out from the second water production pipe 177, completing the entire treatment process.

[0062] Reference Figure 4 In some embodiments of the present invention, the strong oxidizer 180 includes a shell-and-tube reactor 181 , an oxidation water tank 182 and an oxygen release tank 183 . The tubular reactor 181 has an interconnected water inlet and a dosing port, the water inlet is connected to the water supply component 1821, and the dosing port is connected to the hydrogen peroxide dosing component 185 through the ejector 184; the oxidation water tank 182 has a water inlet, a water outlet and an overflow port, the water inlet is connected to the tubular reactor 181, the water outlet is connected to a circulating water pump 1824, the circulating water pump 1824 is connected to a pipeline ejector 1823, the negative pressure port of the pipeline ejector 1823 is connected to an ozone generator 1822, and the outlet of the pipeline ejector 1823 is connected to the water supply component 1821; the oxygen release box 183 is connected to the overflow port, and a nitrogen explosion component 1831 is provided inside, the first outlet of the oxygen release box 183 is connected to a lift pump 1832, and the second outlet of the oxygen release box 183 is connected to an exhaust gas absorber 1833.

[0063] The design of the strong oxidizer 180 aims to achieve effective inactivation of microorganisms and removal of harmful substances in the regenerated wastewater through a series of tightly connected components, thereby ensuring the biological safety of the treated water. The tubular reactor 181, as the front-end processing unit of the strong oxidizer 180, has an interconnected water inlet and a dosing port. The water inlet is connected to the water supply component 1821 for introducing the wastewater to be treated. The dosing port is connected to the hydrogen peroxide dosing component 185 through the ejector 184 to ensure that hydrogen peroxide can be evenly added to the wastewater flowing through the tubular reactor 181 to start the initial oxidation process. At the same time, redox potential measuring instruments are installed at different parts of the tubular reactor 181 to adjust the dosage of hydrogen peroxide and ozone according to the oxidation potential.

[0064] The wastewater flowing out of the tubular reactor 181 then enters the oxidation water tank 182, which has an inlet, an outlet and an overflow, wherein the inlet is directly connected to the tubular reactor 181. The wastewater continues to undergo oxidation reaction in the oxidation water tank 182 to further destroy the remaining organic matter and microorganisms. In order to enhance the oxidation effect, the outlet is connected to a circulating water pump 1824, which pumps part of the treated water back into the pipeline ejector 1823, where the ozone generated by the ozone generator 1822 is sucked in by negative pressure. The water after enhanced oxidation treatment returns to the tubular reactor 181 again, forming a closed-loop system, which ensures the sufficiency and continuity of the oxidation reaction.

[0065] The regenerated wastewater treated by the tubular reactor 181 enters the oxygen release box 183 through the overflow port. The oxygen release box 183 is provided with a nitrogen explosion component 1831. After the explosion, the gas mixed with the remaining ozone enters the tail gas absorber 1833, and the gas after the ozone is adsorbed is discharged into the atmosphere. The wastewater after the ozone is released is supplied to the next process by the lifting pump 1832.

[0066] Reference Figure 5 In some embodiments of the present invention, the shell-and-tube reactor 181 includes a plurality of direct current sections and a plurality of arc-shaped connecting pipes 1814, and the plurality of direct current sections are connected end to end through the arc-shaped connecting pipes 1814; the direct current section includes a water inlet pipe 1811 and a filler reaction tube 1812 connected in sequence, and the filler reaction tube 1812 is provided with at least one reagent injection pipe 1813, and the reagent injection pipe 1813 is connected to the filler reaction tube 1812.

[0067] Specifically, multiple direct current sections are connected end to end through an arc-shaped connecting pipe 1814 to form a flow channel, and the water inlet pipes 1811 at both ends are respectively connected to the water supply component 1821 and the water inlet of the oxidation water tank 182, while the reagent injection pipe 1813 is connected to the dosing port through the injector 184.

[0068] Reference Figure 1 In some embodiments of the present invention, the filter assembly includes a precision filter 140, a self-cleaning filter 150 and an ultrafiltration assembly 160 which are connected in sequence. The precision filter 140 is connected to the sedimentation tank 130, and the ultrafiltration assembly 160 is connected to the ion exchange assembly 170.

[0069] Specifically, the precision filter 140 can adopt a comet fiber filter, which has the characteristics of high dirt interception depth, strong dirt holding capacity, high filtering accuracy, more than 85% interception capacity of organic matter such as oil, thorough backwashing, and good recovery of filter material filtering capacity.

[0070] The self-cleaning filter 150 consists of a cylinder, a filter screen, a filter screen support structure, a filter cleaning device, a control system, a pressure difference switch, a drain valve, etc. It uses a 100um high-precision filter element. The filter control system can meet long-term continuous operation and can automatically clean the filter screen and clean it thoroughly.

[0071] The ultrafiltration component 160 can use a reverse osmosis protection device to intercept fine suspended matter, colloids and macromolecular organic matter in the water, so that its effluent SDI ≤ 3, meet the requirements of the reverse osmosis system for the SDI value and suspended matter, etc., extend the cleaning cycle of the reverse osmosis system, and thus extend its service life. Among them, the membrane element adopts the Japanese Asahi Chemical UNA-620A ultrafiltration membrane, and the absolute filtration accuracy can reach 0.1um. It is equipped with an online backwashing device and a chemical cleaning device, with a water production rate of 90%. The backwash water is equipped with an oxidant NaClO metering dosing device, and the dosing standard is 10-15 mg / L (in terms of effective chlorine).

[0072] Reference Figure 7 In some embodiments of the present invention, a wastewater supply pump is further provided between the wastewater regulating tank 110 and the normal temperature crystallization reactor 120. The wastewater supply pump is also connected to a sludge concentration component, which is used to concentrate the sludge removed from the water supply pump, and the concentrated liquid is re-supplied to the wastewater regulating tank 110, and the remaining sludge is transported to the sludge plant. Air and crystal seeds can be transported to the normal temperature crystallization reactor 120 during operation, and the crystal seeds can be NaOH and Na2CO3. An ultrafiltration water supply pump is provided between the sedimentation tank 130 and the filter component. A Na weak acid resin layer is also provided between the filter component and the ion exchange component 170. Regeneration acid is added in an appropriate amount to the ion exchange component 170 during operation. Air is added in an appropriate amount to the strong oxidizer 180 during operation. The strong oxidizer 180 is connected to the ultrafiltration water production tank 190, and the ultrafiltration water production tank 190 is also provided with a first reflux pipe and a second confluence pipe, the first reflux pipe is connected to the ultrafiltration component 160, and the reflux pipe is also provided with a backwash pump. The second manifold is connected to the precision filter 140, and a cleaning water pump is provided on the second manifold. The precision filter 140 needs to add HCL during the operation process. The ultrafiltration component 160 needs to add cleaning agent, HCL, NaOH and NaCLO during the operation process.

[0073] The present invention also provides a method for pretreating ion exchange water regeneration wastewater, which is implemented based on the ion exchange water regeneration wastewater pretreatment device of any one of the above embodiments, and the ion exchange water regeneration wastewater pretreatment method comprises: S1, crystallizing and separating some impurities in the regeneration wastewater through a normal temperature crystallization reactor 120; S2, precipitating and purifying the crystallized regeneration wastewater in a sedimentation tank 130; S3, filtering the regenerated wastewater after precipitation purification through a filtering component; S4, removing calcium and magnesium ions in the regeneration wastewater through the ion exchange component 170; S5. Kill the microorganisms in the regenerated wastewater through the strong oxidizer 180.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An ion exchange water regeneration wastewater pretreatment device, characterized in that: include: A normal temperature crystallization reactor (120) is used to separate some impurities in the regenerated wastewater by crystallization; A sedimentation tank (130), connected to the normal temperature crystallization reactor (120), for precipitating and purifying the regenerated wastewater after crystallization; A filtering component, connected to the sedimentation tank (130), for filtering the regenerated wastewater after sedimentation purification; An ion exchange component (170), connected to the filter component, for removing calcium and magnesium ions from the regenerated wastewater; A strong oxidizer (180) is connected to the ion exchange component (170) and is used to kill microorganisms in the regenerated wastewater.

2. The ion exchange water production and regeneration wastewater pretreatment device according to claim 1 is characterized in that: The sedimentation tank (130) comprises: A sedimentation shell (131), having a chamber inside, for sedimenting the regenerated wastewater; A sedimentation component (132) having a sedimentation chamber therein and arranged at the top of the chamber, the sedimentation component (132) being used to precipitate impurities on the top of the regenerated wastewater; A cleaning component (133), disposed on the sedimentation housing (131), and used for cleaning sediment at the bottom of the cavity; An external water receiving tank (134) is arranged in communication with the sedimentation chamber and is used to guide the liquid settled in the sedimentation chamber; The first water production pipe (135) is connected to the external water receiving tank (134).

3. The ion exchange water production and regeneration wastewater pretreatment device according to claim 2 is characterized in that: The precipitation shell (131) comprises: A shell body (1311), wherein the cavity is located inside the shell body (1311), and an opening is provided at the top of the shell body (1311); a toothed weir (1314), disposed at one end of the opening; A water distribution trough (1313) is arranged outside the toothed weir (1314), and the bottom end of the water distribution trough (1313) is lower than the top end of the toothed weir (1314); A first water inlet pipe (1312), connected to a side of the water distribution trough (1313) away from the toothed weir (1314); The mud discharge pipe (1315) is arranged at the bottom end of the shell body (1311) and is used for discharging sediment.

4. The ion exchange water production and regeneration wastewater pretreatment device according to claim 3 is characterized in that: The precipitation component (132) comprises: A support plate (1321) is arranged at one end of the opening away from the toothed weir (1314), and the support plate (1321) and the inner wall of the shell body (1311) form the sedimentation chamber; A plurality of inclined tubes (1322) are obliquely arranged at the bottom of the sedimentation chamber, and the bottom ends of the inclined tubes (1322) are in communication with the containing chamber; At least one internal water collecting tank (1323) is disposed on the top of the inclined tube (1322), and the internal water collecting tank (1323) is connected to the external water receiving tank (134); At least one bearing platform (1324) is arranged on the top of the support plate (1321).

5. The ion exchange water regeneration wastewater pretreatment device according to claim 4 is characterized in that: The cleaning component (133) comprises: A motor (1331) is disposed on the supporting platform (1324); A rotating rod (1332) connected to the output shaft of the motor (1331), the bottom end of the rotating rod (1332) extending toward the bottom end of the cavity; The scraper (1333) is arranged at the bottom end of the rotating rod (1332) and is used to stir the sediment at the bottom end of the chamber so that the sediment is discharged through the mud discharge pipe (1315).

6. The ion exchange water production and regeneration wastewater pretreatment device according to claim 1 is characterized in that: The ion exchange component (170) comprises an exchange housing (1711); The interior of the exchange housing (1711) is provided with a first filter plate (1712), a second filter plate (1713) and a third filter plate (1714) in sequence from top to bottom, and the first filter plate (1712), the second filter plate (1713) and the third filter plate (1714) divide the interior of the exchange housing (1711) into a first cavity (1721), a second cavity (1722), a third cavity (1723) and a fourth cavity (1724); The first filter plate (1712) is provided with a plurality of first single-sided filter caps (1731), the second filter plate (1713) is provided with a plurality of double-sided filter caps (1732), and the third filter plate (1714) is provided with a plurality of second single-sided filter caps (1733); The third cavity (1723) is provided with a weak acid cationic resin layer (1781) and a white ball resin grease layer (1782) in order from bottom to top, and a gap is provided between the white ball resin grease layer (1782) and the second filter plate (1713); The second cavity (1722) is provided with a chelating resin layer (1783) and the white ball resin fat pressing layer (1782) in order from bottom to top, and a gap is provided between the white ball resin fat pressing layer (1782) and the first filter plate (1712); At least one layer of porous plate (176) is provided inside the first filter plate (1712).

7. The ion exchange water regeneration wastewater pretreatment device according to claim 1 is characterized in that: The strong oxidizer (180) comprises: The tubular reactor (181) has a water inlet and a dosing port that are connected to each other, the water inlet is connected to a water supply component (1821), and the dosing port is connected to a hydrogen peroxide dosing component (185) via an ejector (184); The oxidation water tank (182) has a water inlet, a water outlet and an overflow port, the water inlet being connected to the tubular reactor (181), the water outlet being connected to a circulating water pump (1824), the circulating water pump (1824) being connected to a pipeline injector (1823), the negative pressure port of the pipeline injector (1823) being connected to an ozone generator (1822), and the outlet of the pipeline injector (1823) being connected to the water supply component (1821); The oxygen release box (183) is connected to the overflow port and is provided with a nitrogen explosion component (1831) therein; a first outlet of the oxygen release box (183) is connected to a lift pump (1832); and a second outlet of the oxygen release box (183) is connected to a tail gas absorber (1833).

8. The ion exchange water production and regeneration wastewater pretreatment device according to claim 7 is characterized in that: The tubular reactor (181) comprises a plurality of direct-flow sections and a plurality of arc-shaped connecting pipes (1814), wherein the plurality of direct-flow sections are connected end to end via the arc-shaped connecting pipes (1814); The direct-flow section comprises a water inlet pipe (1811) and a filler reaction tube (1812) connected in sequence, wherein the filler reaction tube (1812) is sleeved with at least one reagent injection tube (1813), and the reagent injection tube (1813) is in communication with the filler reaction tube (1812).

9. The ion exchange water reclamation wastewater pretreatment device according to any one of claims 1 to 9, characterized in that: The filter assembly comprises a precision filter (140), a self-cleaning filter (150) and an ultrafiltration assembly (160) which are connected in sequence.

10. A method for pretreating ion exchange water regeneration wastewater, characterized in that: Based on the ion exchange water regeneration wastewater pretreatment device according to any one of claims 1 to 9, the ion exchange water regeneration wastewater pretreatment method comprises: Part of the impurities in the regeneration wastewater are separated by crystallization using the normal temperature crystallization reactor (120); The crystallized regenerated wastewater is purified by precipitation in the sedimentation tank (130); Filtering the regenerated wastewater after precipitation purification through the filtering component; Removing calcium and magnesium ions from the regeneration wastewater through the ion exchange component (170); The strong oxidizer (180) kills microorganisms in the regenerated wastewater.

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