Water hardness treatment equipment

Abstract

The utility model relates to the technical field of water treatment, in particular to water hardness treatment equipment which comprises a hardness removing system, a water inlet system, a water outlet system, a water outlet system, a water inlet system and a water outlet system, the air flotation softening system is provided with a first inlet and a first outlet, and the first inlet is connected with the water outlet; the filtering system is provided with a second inlet and a second outlet, and the second inlet is connected with the first outlet; and the container system is provided with a third inlet and a third outlet, and the third inlet is connected with the second outlet. The water hardness treatment equipment provided by the utility model can be used for treating incoming water with relatively complex hardness components, is not only suitable for occasions with relatively high total hardness of calcium ions, but also suitable for occasions with relatively high total hardness of magnesium ions, is high in removal rate of the calcium ions and the magnesium ions, is stable in system operation, and has relatively high economical efficiency in an investment stage and an operation stage.

Description

Technical Field

[0001] The present application relates to the field of water treatment technology, and in particular to a water hardness treatment device. Background Art

[0002] At present, in the water treatment process, it is usually necessary to simultaneously treat the hardness of the water to be treated. The existing process generally adopts precipitation softening process + filtration process + weak acid sodium bed resin process. When the ratio of magnesium ions in the raw water to the total hardness is high, the total hardness entering the weak acid sodium bed is high, resulting in a shorter regeneration cycle of the weak acid sodium bed, frequent regeneration, and a large amount of regenerated wastewater. There is also a treatment process of dosing coagulation tubular microfiltration integrated device + weak acid sodium bed resin treatment. This method has better hardness and silicon removal effects. When the amount of dosing is sufficient, the hardness of the water effluent from the microfiltration membrane is basically less than 20mg / L (in terms of calcium carbonate). However, this process uses tubular microfiltration membranes, which have high unit costs and huge investments; basically 150m 3 / h of water, requiring an investment cost of about 30 million. During the operation of the system, magnesium hydroxide and silicon dioxide are highly viscous and adhere to the surface of the tubular microfiltration membrane, resulting in incomplete backwashing of the tubular microfiltration, rapid pressure differential rise, and frequent chemical cleaning, which takes a long time to clean. In order to solve the problem of tubular microfiltration membrane pollution, some projects use backwash pumps for backwashing, which will cause excessive backwash wastewater. The wastewater eventually returns to the front end of the tubular microfiltration, resulting in an increase in processing capacity and huge investment. In addition, within an operating cycle, the flux of the microfiltration operation is huge at the beginning, reaching 300-400LMH, and after 20-60 minutes, the final flux is significantly reduced, that is, the water output is very large at the beginning, and in less than 1 hour, the water output is reduced to half of the original. It is not continuous and uniform water production, the program is not easy to control, and there are various operating problems. Due to the easy operation problems, and the investment cost and operating cost are very high, the practicality of this process is general. Utility Model Content

[0003] The purpose of this application is to provide a water hardness treatment device to solve, to a certain extent, the technical problems existing in the prior art that the existing water treatment process is prone to produce a large amount of wastewater during hardness treatment, has high operating costs and weak stability.

[0004] The present application provides a water hardness treatment device, comprising: a hardness removal system, wherein the hardness removal system is provided with a water inlet and a water outlet;

[0005] An air flotation softening system, wherein the air flotation softening system is provided with a first inlet and a first outlet, wherein the first inlet is connected to the water outlet;

[0006] A filtration system, wherein the filtration system is provided with a second inlet and a second outlet, wherein the second inlet is connected to the first outlet;

[0007] The container system is provided with a third inlet and a third outlet, wherein the third inlet is connected to the second outlet.

[0008] In the above technical solution, further, the hardness removal system includes:

[0009] A first coagulation zone, wherein the first coagulation zone is provided with a first reagent addition port and the incoming water inlet;

[0010] a first flocculation zone, the first flocculation zone being connected to the first coagulation zone; the first flocculation zone being provided with a second reagent addition port;

[0011] A sedimentation and softening tank, the sedimentation and softening tank is connected to the first flocculation zone, and the sedimentation and softening tank is provided with the water outlet.

[0012] In any of the above technical solutions, further, the first coagulation zone is provided with a first preset operation time, and the first preset operation time is 0.5 to 5 minutes;

[0013] The first flocculation zone is provided with a second preset operation time, and the second preset operation time is 6 to 20 minutes;

[0014] The sedimentation and softening tank is provided with a preset sedimentation time, and the preset sedimentation time is not less than 20 minutes.

[0015] In any of the above technical solutions, further, the air flotation softening system includes:

[0016] a second coagulation zone, wherein the second coagulation zone is provided with a third reagent addition port and the first inlet;

[0017] a second flocculation zone, the second flocculation zone being connected to the second coagulation zone; the second flocculation zone being provided with a fourth reagent addition port;

[0018] An air flotation softening tank, the air flotation softening tank is connected to the second flocculation zone, and the air flotation softening tank is provided with the first outlet.

[0019] In any of the above technical solutions, further, the second coagulation zone is provided with a third preset operation time, and the third preset operation time is 0.5 to 5 minutes;

[0020] The second flocculation zone is provided with a fourth preset operation time, and the fourth preset operation time is 6 to 12 minutes.

[0021] In any of the above technical solutions, further, the first coagulation zone is also provided with a first pH adjustment port;

[0022] The second coagulation zone is also provided with a second pH adjustment port.

[0023] In any of the above technical solutions, further, the container system includes:

[0024] a container, wherein the third inlet and the third outlet are disposed in the container;

[0025] An ion exchange resin is disposed in the container.

[0026] In any of the above technical solutions, further, the container is also provided with a fifth reagent addition port, a third pH adjustment port and a regeneration wastewater discharge port.

[0027] In any of the above technical solutions, further, the ion exchange resin is a weak acid sodium type ion resin.

[0028] In any of the above technical solutions, further, the water hardness treatment equipment also includes:

[0029] A sludge treatment device, the sedimentation softening tank and the air flotation softening tank are respectively connected to the sludge treatment device;

[0030] A reverse osmosis device is connected to the third outlet.

[0031] Compared with the prior art, the beneficial effects of this application are:

[0032] The water hardness treatment equipment provided in the present application includes: a hardness removal system, which is provided with a water inlet and a water outlet; a flotation softening system, which is provided with a first inlet and a first outlet, and the first inlet is connected to the water outlet; a filtration system, which is provided with a second inlet and a second outlet, and the second inlet is connected to the first outlet; and a container system, which is provided with a third inlet and a third outlet, and the third inlet is connected to the second outlet.

[0033] The water hardness treatment equipment provided in the present application is capable of treating water with relatively complex hardness components. It is suitable for situations where calcium ions account for a relatively high proportion of the total hardness, and it is also suitable for situations where magnesium ions account for a relatively high proportion of the total hardness. The removal rate of calcium ions and magnesium ions is high, the system operates stably, and it has high economy in both the investment stage and the operation stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1 This is a schematic diagram of the structure of the water hardness treatment equipment provided in an embodiment of the present application.

[0036] Reference numerals:

[0037] 1-first coagulation zone, 101-water inlet, 102-first reagent addition port, 2-first flocculation zone, 201-second reagent addition port, 3-sedimentation and softening tank, 301-water outlet, 4-second coagulation zone, 401-first inlet, 402-third reagent addition port, 5-second flocculation zone, 501-fourth reagent addition port, 6-flotation softening tank, 601-first outlet, 7-filtration system, 701-second inlet, 702-second outlet, 703-wastewater discharge port, 8-container system, 801-third inlet, 802-third outlet, 803-regenerated wastewater discharge port, 9-sludge treatment device. DETAILED DESCRIPTION

[0038] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0039] The components of the embodiments of the present application generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed, but merely represents the selected embodiments of the present application.

[0040] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0041] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0042] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] Refer to the following Figure 1 The water hardness treatment device according to the embodiment of the present application is described.

[0044] An embodiment of the present application provides a water hardness treatment device, which includes a hardness removal system, a flotation softening system, a filtration system 7 and a container system 8 connected in sequence, wherein the hardness removal system is provided with a water inlet, and the water to be treated enters the hardness removal system through the water inlet, and the water to be treated precipitates in the hardness removal system, and the precipitate settles to the bottom of the hardness removal system. The hardness removal system is also provided with a water outlet 301, and the water to be treated after sedimentation flows into the flotation softening system through the water outlet 301.

[0045] The flotation softening system is provided with a first inlet 401 and a first outlet 601. The first inlet 401 is connected to the water outlet 301 of the hardness removal system. The untreated water flowing out of the hardness removal system flows into the flotation softening system through the first inlet 401 for treatment.

[0046] The filtering system 7 is provided with a second inlet 701 and a second outlet 702 . The second inlet 701 is connected to the first outlet 601 . The treated water treated by the air flotation softening system flows into the filtering system 7 through the second inlet 701 for filtration.

[0047] The container system 8 is provided with a third inlet 801 and a third outlet 802. The third inlet 801 is connected to the second outlet 702. The untreated water after filtering by the filtering system 7 flows into the container system 8 through the second outlet 702 and the third inlet 801 for further processing. The third outlet 802 can be used as a main outlet and can also be connected to a subsequent water treatment system.

[0048] In one embodiment of the present application, preferably, the hardness removal system comprises:

[0049] The first coagulation zone 1 is provided with a first reagent addition port 102 and an incoming water inlet;

[0050] A first flocculation zone 2, the first flocculation zone 2 is connected to the first coagulation zone 1;

[0051] The sedimentation and softening tank 3 is connected to the first flocculation zone 2 , and the sedimentation and softening tank 3 is provided with a water outlet 301 .

[0052] In this embodiment, the first coagulation zone 1, the first flocculation zone 2 and the sedimentation and softening tank 3 are connected in sequence, wherein the incoming water inlet is arranged in the first coagulation zone 1, and the water outlet 301 is arranged in the sedimentation and softening tank 3. In the initial stage, the water to be treated flows through the first coagulation zone 1, the first flocculation zone 2 and the sedimentation and softening tank 3 in sequence through the incoming water inlet, and the water to be treated is treated in turn.

[0053] The first coagulation zone 1 has a trough, box or tank structure, and is provided with a first reagent addition port 102, which is used to add reagents into the first coagulation zone 1 so that the reagents can mix with and react with the water to be treated flowing into the first coagulation zone 1. Specifically, the reagent added into the first coagulation zone 1 through the first reagent addition port 102 is lime or sodium hydroxide, either or both of which can be used, as well as a coagulant. Lime or sodium hydroxide can fully react with calcium ions and magnesium ions in the water to be treated, and the coagulant can cause the reaction to produce precipitation and aggregate into larger clusters.

[0054] Furthermore, the first coagulation zone 1 is also provided with a first pH adjustment port, through which a regulator can be added into the first coagulation zone 1 to adjust the pH value of the water in the first coagulation zone 1 to be within a set range. Preferably, the pH value in the first coagulation zone 1 is set at 10-11. By adjusting the pH value, the sedimentation effect of the water to be treated in the first coagulation zone 1 can be improved.

[0055] Furthermore, the first flocculation zone 2 has a trough, box or tank structure, and the first flocculation zone 2 is provided with a second agent addition port 201, and the second agent addition port 201 is used to add agents into the first flocculation zone 2 so that the agents can mix with the water to be treated flowing into the first flocculation zone 2 and react. Specifically, the agent added into the first flocculation zone 2 through the second agent addition port 201 is sodium carbonate, and flocculant is also added into the first flocculation zone 2 through the second agent addition port 201 to ensure that sodium carbonate is added in sufficient amount. Sodium carbonate can mix with the water to be treated and react with calcium ions and magnesium ions in the water to be treated to produce precipitation. Since flocculant is added into the first flocculation zone 2, calcium and magnesium precipitates are fully flocculated.

[0056] Furthermore, the sedimentation and softening tank 3 is connected to the first flocculation zone 2. The water to be treated flows into the sedimentation and softening tank 3 after being fully flocculated in the first flocculation zone 2. The precipitated substances produced after the flocculation of the water to be treated are settled in the sedimentation and softening tank 3. The calcium ions in the water to be treated are converted into calcium carbonate, and the suspended matter in the water to be treated is converted into precipitate. The above two major types of substances are precipitated in the sedimentation and softening tank 3. The precipitated substances settle to the bottom of the sedimentation and softening tank 3, and the supernatant flows from the water outlet 301 to the flotation softening system. Preferably, the water outlet 301 is arranged at the top of the sedimentation and softening tank 3.

[0057] The untreated water treated by the hardness removal system removes most of the calcium ions and suspended matter, as well as a certain amount of magnesium ions. When the incoming water has a high ratio of magnesium ions to total hardness, a certain amount of magnesium ions still exists in the untreated water flowing out through the outlet 301.

[0058] In one embodiment of the present application, preferably, the first coagulation zone 1 is provided with a first preset operation time, and the first preset operation time is 0.5 to 5 minutes;

[0059] The first flocculation zone 2 is provided with a second preset operation time, and the second preset operation time is 6 to 20 minutes;

[0060] The sedimentation and softening tank 3 is provided with a preset sedimentation time, and the preset sedimentation time is not less than 20 minutes.

[0061] In this embodiment, the reaction time or coagulation time of the water to be treated in the first coagulation zone 1 is controlled to be 0.5 to 5 minutes to ensure the reaction effect of the agent with the corresponding substances in the water to be treated. Preferably, the dosage of the coagulant is 1 to 500 mg / L.

[0062] The reaction time of the water to be treated in the first flocculation zone 2 is controlled to be 6 to 20 minutes to ensure the flocculation effect of the corresponding substances in the water to be treated. Preferably, the dosage of the flocculant is 0.2 to 1.2 mg / L.

[0063] The sedimentation time of the water to be treated in the sedimentation and softening tank 3 is not less than 20 minutes to ensure the sedimentation effect of the above two types of substances.

[0064] Preferably, the supernatant in the sedimentation and softening tank 3 is tested before being discharged into the flotation softening system. After testing, the calcium hardness of the effluent from the sedimentation and softening tank 3 is stably below 15 mg / L (in terms of calcium carbonate), the magnesium hardness of the effluent from the sedimentation and softening tank 3 is stably below 100 mg / L, and the turbidity of the effluent is stably below 3 NTU.

[0065] In one embodiment of the present application, preferably, the air flotation softening system comprises:

[0066] The second coagulation zone 4 is provided with a second reagent addition port 201 and a first inlet 401;

[0067] A second flocculation zone 5, the second flocculation zone 5 is connected to the second coagulation zone 4;

[0068] The air flotation softening tank 6 is connected to the second flocculation zone 5 , and the air flotation softening tank 6 is provided with a first outlet 601 .

[0069] In one embodiment of the present application, preferably, the second coagulation zone 4 is provided with a third preset operation time, and the third preset operation time is 0.5 to 5 minutes;

[0070] The second flocculation zone 5 is provided with a fourth preset operation time, and the fourth preset operation time is 6 to 12 minutes.

[0071] In this embodiment, the second coagulation zone 4, the second flocculation zone 5 and the flotation softening tank 6 are connected in sequence, the first inlet 401 is arranged in the second coagulation zone 4, and the effluent of the sedimentation softening tank 3 flows into the second coagulation zone 4 through the first inlet 401. The second coagulation zone 4 has a tank body, a box body or a tank body structure, and the second coagulation zone 4 is provided with a third reagent addition port 402 to add a reagent for reacting with the water to be treated into the second coagulation zone 4. Specifically, the reagent added into the second coagulation zone 4 through the third reagent addition port 402 is sodium hydroxide and a coagulant, so that the sodium ions can convert the magnesium ions in the water to be treated into magnesium hydroxide. Preferably, the reaction time of the water to be treated in the second coagulation zone 4 is 0.5 to 5 minutes to ensure the replacement effect of the magnesium ions and the coagulation effect on other substances in the water to be treated. Preferably, the dosage of the coagulant is 1 to 500 mg / L.

[0072] Preferably, the second coagulation zone 4 is also provided with a second pH regulating port so that a pH regulator can be added into the second coagulation zone 4 to adjust the pH of the water to be treated in the second coagulation zone 4 so that the pH of the water to be treated is maintained above 11. Preferably, the pH of the water to be treated is controlled at about 11.6, thereby improving the coagulation effect of the water to be treated and the flocculation effect described below.

[0073] Furthermore, the second flocculation zone 5 has a tank, box or tank structure, and the second flocculation zone 5 is provided with a fourth agent addition port 501, which is used to add a coagulant to the second flocculation zone 5, and sodium hydroxide agent can also be added through the fourth agent addition port 501. The magnesium ions in the water to be treated are converted into magnesium hydroxide in the second flocculation zone 5, and adsorption bridging is ensured. A small amount of calcium ions contained in the water to be treated can also be replaced, thereby significantly reducing the hardness of the water to be treated. In addition, since the pH is adjusted in the reaction stage of the second coagulation zone 4, the water to be treated is within the current pH range, and the flocculation time is controlled at 6 to 12 minutes, so that the water to be treated can be fully flocculated. Preferably, the flocculant dosage is 0.2 to 1.2 mg / L.

[0074] Furthermore, after the water to be treated is fully flocculated in the second flocculation zone 5, it flows into the flotation softening tank 6. The flotation softening tank 6 is provided with a scraper. After the water to be treated flowing out of the second flocculation zone 5 flows into the flotation softening tank 6, magnesium hydroxide is easy to float. The flotation softening tank 6 uses bubbles to make the magnesium hydroxide reach the surface of the flotation tank and is removed by the scraper, thereby achieving the purpose of removing magnesium ions.

[0075] The first outlet 601 is provided in the flotation softening tank 6. Preferably, the first outlet 601 is provided in the upper part of the flotation softening tank 6. The flotation softening tank 6 is provided with a perforated plate. The effluent of the flotation softening tank 6 flows from the bottom through the perforated plate to the filtration system 7. Preferably, the load of the flotation separation zone of the flotation softening tank 6 is controlled at 6 to 40 m 3 / m 2 .h, after treatment, the calcium ions and magnesium ions in the effluent from the flotation softening tank 6 are reduced to a very low level.

[0076] Furthermore, the flotation softening tank 6 is also connected to the sludge treatment device 9 described below, and the floating materials deposited in the flotation softening tank 6 can be discharged into the sludge treatment device 9 .

[0077] After the water to be treated is treated by the flotation softening system, the calcium and magnesium ions therein are significantly reduced to a very low level. After testing, the calcium hardness of the effluent from the flotation softening tank 6 is stable at 15 mg / L (calculated as calcium carbonate), the magnesium hardness is stable below 25 mg / L, and the effluent turbidity is stable below 2NTU.

[0078] It should be noted that the flotation process is a commonly used process in sewage treatment technology. The flotation softening tank in this embodiment can be a common flotation bed, flotation box, flotation tank, etc. in the prior art.

[0079] In one embodiment of the present application, preferably, the filtration system 7 can use a gravity filter or a pressure filter to filter out residual trace suspended matter in the effluent of the flotation softening tank 6 .

[0080] Preferably, the filtration system 7 is also provided with a wastewater discharge port 703, and the wastewater discharge port 703 is connected to the water inlet 101, or the wastewater discharge port 703 is connected to the front end of the water supply pipeline of the water inlet 101, so that the wastewater generated by the filtration system 7 can be treated together with the water to be treated, and there is no need to set up other water treatment devices to treat the wastewater of the filtration system 7 separately.

[0081] In one embodiment of the present application, preferably, the container system 8 comprises:

[0082] A container, a third inlet 801 and a third outlet 802 are disposed in the container;

[0083] The ion exchange resin is arranged in a container.

[0084] In one embodiment of the present application, preferably, the container is also provided with a fifth reagent addition port, a third pH adjustment port and a regeneration wastewater discharge port 803 .

[0085] In one embodiment of the present application, preferably, the ion exchange resin is a weakly acidic cationic resin.

[0086] In this embodiment, the container system 8 includes a container and an ion exchange resin arranged in the container. The ion exchange resin is in the form of spherical particles. The container is filled with a sufficient amount of ion exchange resin, which is obtained by purchase. Preferably, the ion exchange resin used in this application is a weak acid cationic resin, more preferably a weak acid sodium resin, so that the container system 8 forms a weak acid sodium bed. This type of resin contains weak acid sodium groups, which can be adsorbed and combined with calcium ions and magnesium ions in the water to be treated to produce a special cation exchange effect, thereby further removing the calcium and magnesium ions in the water to be treated, and then reducing the hardness of the water to be treated.

[0087] Furthermore, the container is provided with a third inlet 801 and a third outlet 802, wherein the third inlet 801 is connected to the second outlet 702, so that the water filtered by the filtration system 7 flows into the container through the third inlet 801 and fully contacts with the ion exchange resin, and the water generated after the ions in the water to be treated are adsorbed and combined flows out of the container through the third outlet 802.

[0088] Furthermore, the container is also provided with a third pH adjustment port so that a regulator can be added into the container to adjust the pH of the regenerated water in the container, which can be modified as needed. It should be noted that in this embodiment, a weak acid sodium bed is used instead of a weak acid hydrogen bed, so that the pH value at the rear end does not fluctuate; a weak acid resin is used instead of a strong acid resin, so that the exchange capacity can be large enough. According to testing, the hardness of the effluent water after being treated by the container system 8 is close to zero, and the water hardness treatment equipment provided by the present application can ensure that the effluent hardness is less than or equal to 5 mg / L (in terms of calcium carbonate).

[0089] Preferably, the container is also provided with a fifth reagent addition port and a regeneration wastewater discharge port 803, and the regeneration wastewater discharge port 803 is connected to the sedimentation softening tank 3. The fifth reagent addition port can be used to add a regeneration agent into the container. After the weak acid sodium bed has been running for a certain period of time, resin exchange failure may occur, and regeneration is required after failure. The regeneration agent can be added into the container during the regeneration process. Hydrochloric acid or sulfuric acid is used for regeneration, and then sodium hydroxide is used for regeneration. Regeneration will produce high-concentration regeneration wastewater containing hardness. First, adjust the pH value of the regeneration wastewater to make its pH strongly acidic, and then add sodium hydroxide to make its pH strongly alkaline. After regeneration, coagulant, sodium carbonate and The coagulant causes the regenerated wastewater to precipitate, and after treatment, the hardness of the regenerated wastewater is reduced to become sludge, which eventually enters the sludge treatment device 9. The effluent after precipitation returns to the front end of the first coagulation zone 1.

[0090] It should be noted that during the regeneration process, the third outlet 802 can be temporarily closed. In addition, since the water hardness treatment equipment can remove most of the calcium ions and magnesium ions in the water, the regeneration cycle of the weak acid sodium bed can be greatly extended, reducing equipment investment and reducing the consumption of acid and alkali.

[0091] In one embodiment of the present application, preferably, the water hardness treatment device further comprises:

[0092] A sludge treatment device 9, which is connected to the sedimentation and softening tank 3;

[0093] A reverse osmosis device is connected to the third outlet 802 .

[0094] In this embodiment, the sedimentation and softening tank 3 is provided with a sediment discharge port, and the sludge treatment device 9 is connected to the sediment discharge port, and the sediment deposited at the bottom of the sedimentation and softening tank 3 is discharged into the sludge treatment device 9 through the sediment discharge port. The sludge treatment device 9 dehydrates the sediment, and then the dehydrated muddy waste can be transported to a designated location. It should be noted that the sludge treatment device 9 is a common device used in water treatment systems and waste treatment systems in the prior art, and its specific working principle and process can be fully understood by those skilled in the art, and will not be repeated here.

[0095] The third outlet 802 is provided in the container system 8, and the third outlet 802 can be used as the main outlet of the water hardness treatment device. Preferably, the third outlet 802 is connected to a reverse osmosis device, and the effluent released through the third outlet 802 enters the reverse osmosis device for reverse osmosis treatment, thereby preventing reverse osmosis from scaling. The hardness removal system thus more thoroughly removes calcium and magnesium ions in the water to be treated, and reduces the hardness of the water to be treated. Since most of the impurities in the water to be treated have been removed after the treatment of the previous hardness removal system, the filtration system 7 and the container system 8, the reverse osmosis device does not need to add chemicals, and directly enters the reverse osmosis under high pH conditions, which can save the addition of reverse osmosis scale inhibitors.

[0096] To sum up, the water hardness treatment equipment provided in the present application can treat water with relatively complex hardness components. It is suitable for situations where calcium ions account for a relatively high proportion of the total hardness, and it is also suitable for situations where magnesium ions account for a relatively high proportion of the total hardness. The removal rate of calcium ions and magnesium ions is high, the system operates stably, and it has high economy in both the investment stage and the operation stage.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application 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 replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A water hardness treatment device, characterized in that: include: A hardness removal system, wherein the hardness removal system is provided with a water inlet and a water outlet; An air flotation softening system, wherein the air flotation softening system is provided with a first inlet and a first outlet, wherein the first inlet is connected to the water outlet; A filtration system, wherein the filtration system is provided with a second inlet and a second outlet, wherein the second inlet is connected to the first outlet; The container system is provided with a third inlet and a third outlet, wherein the third inlet is connected to the second outlet.

2. The water hardness treatment device according to claim 1, characterized in that: The hardness removal system comprises: A first coagulation zone, wherein the first coagulation zone is provided with a first reagent addition port and the incoming water inlet; a first flocculation zone, the first flocculation zone being connected to the first coagulation zone; the first flocculation zone being provided with a second reagent addition port; A sedimentation and softening tank, the sedimentation and softening tank is connected to the first flocculation zone, and the sedimentation and softening tank is provided with the water outlet.

3. The water hardness treatment device according to claim 2, characterized in that: The first coagulation zone is provided with a first preset operation time, and the first preset operation time is 0.5 to 5 minutes; The first flocculation zone is provided with a second preset operation time, and the second preset operation time is 6 to 20 minutes; The sedimentation and softening tank is provided with a preset sedimentation time, and the preset sedimentation time is not less than 20 minutes.

4. The water hardness treatment device according to claim 2, characterized in that: The air flotation softening system comprises: a second coagulation zone, wherein the second coagulation zone is provided with a third reagent addition port and the first inlet; a second flocculation zone, the second flocculation zone being connected to the second coagulation zone; the second flocculation zone being provided with a fourth reagent addition port; An air flotation softening tank, the air flotation softening tank is connected to the second flocculation zone, and the air flotation softening tank is provided with the first outlet.

5. The water hardness treatment device according to claim 4, characterized in that: The second coagulation zone is provided with a third preset operation time, and the third preset operation time is 0.5 to 5 minutes; The second flocculation zone is provided with a fourth preset operation time, and the fourth preset operation time is 6 to 12 minutes.

6. The water hardness treatment device according to claim 4, characterized in that: The first coagulation zone is also provided with a first pH adjustment port; The second coagulation zone is also provided with a second pH adjustment port.

7. The water hardness treatment device according to claim 1, characterized in that: The container system comprises: a container, wherein the third inlet and the third outlet are disposed in the container; An ion exchange resin is disposed in the container.

8. The water hardness treatment device according to claim 7, characterized in that: The container is also provided with a fifth reagent adding port, a third pH adjustment port and a regeneration wastewater discharge port.

9. The water hardness treatment device according to claim 7, characterized in that: The ion exchange resin is a weak acid sodium type ion resin.

10. The water hardness treatment device according to claim 4, characterized in that: The water hardness treatment equipment also includes: A sludge treatment device, the sedimentation softening tank and the air flotation softening tank are respectively connected to the sludge treatment device; A reverse osmosis device is connected to the third outlet.

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