Industrial wastewater treatment device and treatment method

Abstract

The invention provides an industrial wastewater treatment device and treatment method, and relates to the technical field of wastewater treatment. The industrial wastewater treatment device comprises a fluidized bed device, the fluidized bed device is at least provided with a reactor, the reactor is provided with a raw water inlet, a chemical feeding port, a magnetic seed and crystal seed feeding port, a particle discharging port and a water outlet, the raw water inlet is used for feeding wastewater to be treated into the reactor, the chemical feeding port is used for feeding chemicals into the reactor, and magnetic seeds and crystal seeds are fed into the magnetic seed and crystal seed feeding port; the particle discharge port is used for discharging crystal particles, the water outlet is used for discharging fluidized bed effluent, and the fluidized bed effluent is effluent obtained after the to-be-treated wastewater reacts with the chemicals, the magnetic seeds and the crystal seeds. By applying the scheme provided by the invention, the wastewater treatment efficiency can be effectively improved, and the flexibility and effect of wastewater treatment can be remarkably enhanced by adding the magnetic seeds and the crystal seeds, so that the treated water quality is more stable.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, and in particular to an industrial wastewater treatment device and a treatment method. Background Art

[0002] Coal mine water mainly comes from groundwater that enters the tunnel due to mining. Suspended matter such as coal powder and rock powder carried by mining is the main pollutant in mine water and one of the main pollutants removed by mine water pretreatment. In recent years, as an unconventional water resource, in order to improve the reuse rate of mine water, it is essential to conduct membrane concentration treatment on mine water to recover desalted water. The fouling and scaling problems that easily appear on the membrane surface during membrane concentration have become a key factor restricting its application. The control of calcium and magnesium hardness ions in pretreatment is a prerequisite for the smooth operation of the membrane concentration system. Therefore, the control of suspended matter and hardness ions in mine water is the key to continuously improve the recovery rate of mine water.

[0003] For mine water with high suspended matter and high hardness, the traditional method is to remove it step by step in the pretreatment stage. The first step is suspended matter treatment, which includes coagulation, sedimentation, clarification, filtration and other steps. Coagulation mainly involves the addition of flocculants and coagulants, which can form alum flowers under the action of adsorption and bridging of suspended matter in the water. Sedimentation and clarification mainly use methods such as horizontal flow sedimentation tanks, vertical flow sedimentation tanks and inclined plate (tubular) sedimentation tanks. Filtration generally refers to the use of granular filter layers such as quartz sand and ultrafiltration to intercept suspended matter in the water and improve the quality of the effluent. The second step is hardness treatment. At present, the methods that can effectively reduce the hardness in water mainly include softening and dosing method, ion exchange method, tubular membrane microfiltration method and crystallization granulation method. Softening and dosing method is one of the most widely used hardness removal processes. By adding chemical agents such as lime and caustic soda, one or several agents can be selected for use simultaneously according to the specific water quality. However, the structure of the formed sediment is loose, and it is necessary to accelerate the aggregation and sedimentation separation of hardness sediment particles through coagulation sedimentation or tubular microfiltration again. In addition, the sludge formed after sedimentation has a high moisture content, and subsequent sludge concentration and dehydration equipment is required.

[0004] Currently, no effective solution has been proposed for the above-mentioned technical problems. Summary of the invention

[0005] The main purpose of the present invention is to provide an industrial wastewater treatment device and a treatment method to solve the problems of high investment, large floor space and high drug consumption in the prior art for the treatment of suspended matter and hardness distribution.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, there is provided an industrial wastewater treatment device, comprising: a fluidized bed device, the fluidized bed device at least having a reactor, the reactor having a raw water inlet, a drug adding port, a magnetic seed crystal feeding port, a particle discharge port and a water outlet, the raw water inlet is used to introduce the wastewater to be treated into the reactor, the drug adding port is used to introduce the reagent into the reactor, the magnetic seed crystal feeding port is used to introduce the magnetic seed and the crystal seed, the particle discharge port is used to discharge the crystallized particles, the water outlet is used to discharge the fluidized bed effluent, and the fluidized bed effluent is the effluent after the wastewater to be treated reacts with the reagent, the magnetic seed and the crystal seed.

[0007] Furthermore, the industrial wastewater treatment device also includes: a filtering device, which is connected to the water outlet of the fluidized bed device and is used to filter the water outlet of the fluidized bed.

[0008] Furthermore, the industrial wastewater treatment device also includes: a magnetic separation recovery device, which is connected to the particle discharge port of the fluidized bed device, and is used to perform magnetic seed recovery treatment and crystal recovery treatment on the crystalline particles.

[0009] Furthermore, the industrial wastewater treatment device also includes: a regulating tank, the water outlet of the regulating tank is connected to the raw water inlet of the fluidized bed device, and the regulating tank is used to make the water quality uniform and remove sediments in the water.

[0010] Furthermore, the magnetic seed crystal feed port and the water outlet are both arranged at the top of the reactor, the drug addition port is arranged at the middle of the reactor, and the particle discharge port and the raw water inlet are arranged at the bottom of the reactor.

[0011] According to another aspect of the present invention, there is provided a method for treating industrial wastewater, which is carried out using the above-mentioned industrial wastewater treatment device, and comprises the following steps: introducing wastewater to be treated into a fluidized bed device, and adding magnetic seeds, crystal seeds and alkaline agents, which are used to react with suspended matter and hardness of the wastewater to be treated and generate crystalline particles; regulating the pH value and turbidity of the wastewater to be treated to remove suspended matter and hardness in the wastewater to be treated and obtain fluidized bed effluent.

[0012] Furthermore, the method also includes: filtering the effluent from the fluidized bed to obtain filtered water.

[0013] Furthermore, the method also includes: performing magnetic seed recovery treatment and crystal recovery treatment on the crystal particles discharged from the fluidized bed to obtain recyclable magnetic seeds and crystal seeds.

[0014] Furthermore, before introducing the wastewater to be treated into the fluidized bed, the method further comprises: introducing the wastewater to be treated into a regulating tank, and introducing the effluent from the regulating tank into the fluidized bed.

[0015] Furthermore, the seed crystal is any one of calcium carbonate crystal, quartz sand, and garnet, and / or the alkaline agent is any one of NaOH and Na2CO3.

[0016] By applying the technical solution of the present invention, the wastewater to be treated is introduced into the reactor through the raw water inlet. The wastewater to be treated contains suspended matter such as coal powder, rock powder and high-hardness calcium and magnesium ions. The magnetic seed and the crystal seed are introduced into the reactor through the magnetic seed and crystal seed feeding port. The suspended matter will be adsorbed on the surface of the magnetic seed to achieve aggregation of the suspended matter. Then, the reagent is introduced into the reactor through the reagent feeding port. The reagent can react with the high-hardness calcium and magnesium ions in the wastewater to be treated to form precipitated insoluble matter, which is then adsorbed on the magnetic seed and the crystal seed for aggregation. In the process of adsorbing and aggregating suspended matter and precipitated insoluble matter, the mass of the seeds continues to increase. When the wastewater to be treated is in a fluidized state, the crystal seeds and magnetic seeds will sink to the particle discharge port, and the wastewater to be treated will be discharged from the outlet after being treated with suspended matter and hardness in the reactor, thereby realizing the separation of the crystal seeds, magnetic seeds and the effluent from the fluidized bed. Through the design of the industrial wastewater treatment device, not only can the wastewater treatment efficiency be effectively improved, but also the flexibility and effect of wastewater treatment can be significantly enhanced by the addition of magnetic seeds and crystal seeds, making the treated water quality more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic flow chart showing an embodiment of the method for treating industrial wastewater according to the present invention is shown;

[0019] Figure 2 A schematic structural diagram of an embodiment of an industrial wastewater treatment device according to the present invention is shown;

[0020] Figure 3 A schematic flow chart of an embodiment of the industrial wastewater treatment method according to the present invention is shown.

[0021] The above drawings include the following reference numerals:

[0022] 1. Fluidized bed device; 2. Crystal seeds; 3. Magnetic seeds; 4. Feeding port; 5. Dosing port; 6. Raw water inlet; 7. Particle discharge port; 8. Water outlet. DETAILED DESCRIPTION

[0023] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0024] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0026] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of the layers and regions may be enlarged, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

[0027] Combination Figure 1 to Figure 2 As shown, according to a specific embodiment of the present application, an industrial wastewater treatment device is provided.

[0028] Specifically, Figure 2 As shown, the industrial wastewater treatment device includes a fluidized bed device 1, which has at least a reactor. The reactor has a raw water inlet 6, a drug adding port 5, a magnetic seed crystal feeding port 4, a particle discharge port 7 and a water outlet 8. The raw water inlet 6 is used to introduce the wastewater to be treated into the reactor, the drug adding port 5 is used to introduce the reagent into the reactor, the magnetic seed crystal feeding port 4 is used to introduce the magnetic seed 3 and the crystal seed 2, the particle discharge port 7 is used to discharge the crystal particles, and the water outlet 8 is used to discharge the fluidized bed effluent, which is the effluent after the wastewater to be treated reacts with the reagent, the magnetic seed 3 and the crystal seed 2.

[0029] By applying the technical solution of this embodiment, the wastewater to be treated is introduced into the reactor through the raw water inlet 6. The wastewater to be treated contains suspended matter such as coal powder, rock powder, and high-hardness calcium and magnesium ions. The magnetic seed 3 and the crystal seed 2 are introduced into the reactor through the magnetic seed crystal feeding port 4. The suspended matter will be adsorbed on the surface of the magnetic seed 3 to achieve aggregation of the suspended matter. Then, the reagent is introduced into the reactor through the reagent feeding port 5. The reagent can react with the high-hardness calcium and magnesium ions in the wastewater to be treated to form precipitated insoluble matter, which is then adsorbed on the magnetic seed 3 and the crystal seed 2 for aggregation. In the process of adsorbing and aggregating suspended matter and precipitated insoluble matter, the mass of seed 3 continues to increase. When the wastewater to be treated is in a fluidized state, the crystal seed 2 and magnetic seed 3 will sink to the particle discharge port 7, and the wastewater to be treated will be discharged from the outlet 8 after being treated with suspended matter and hardness in the reactor, thereby realizing the separation of crystal seed 2, magnetic seed 3 and fluidized bed effluent. Through the design of the industrial wastewater treatment device, not only can the wastewater treatment efficiency be effectively improved, but also the flexibility and effect of wastewater treatment can be significantly enhanced by the addition of magnetic seed 3 and crystal seed 2, making the treated water quality more stable.

[0030] It should be noted that suspended matter is mainly adsorbed on the magnetic seed 3, and precipitated insoluble matter is mainly adsorbed on the crystal seed 2. Therefore, the magnetic seed 3 and the crystal seed 2 need to select particles with large specific surface area and small strength to increase the adsorption effect on suspended matter and precipitated insoluble matter. Since the hardness ions in the wastewater are mainly calcium and magnesium ions, the reagents can be alkaline substances such as NaOH and Na2CO3, which can react with the calcium and magnesium ions in the wastewater to form water-insoluble precipitates, which can then be adsorbed by the fluidized crystal seed 2.

[0031] Optionally, the seed crystal can be a calcium carbonate crystal with a large specific surface area and low strength of 0.1-0.5mm, or a natural mineral carrier such as quartz sand, garnet, etc.; the reagent can be other alkaline substances to make the high hardness ions form carbonate, hydroxide precipitation, fluoride precipitation, sulfide precipitation or phosphate precipitation, etc., and heterogeneously crystallize on the seed crystal 2 and the suspended matter. In actual application selection, the selection of seed crystal 2, reagent and reagent dosage can be flexibly adjusted according to the different types of wastewater generated in different mining areas, so as to achieve the best treatment effect.

[0032] Specifically, Figure 1As shown, the industrial wastewater treatment device also includes a filtering device, which is connected to the water outlet 8 of the fluidized bed device 1, and the filtering device is used to filter the fluidized bed effluent. The weight of the magnetic seed 3 and the crystal seed 2 increases during the process of adsorbing suspended matter and insoluble sediments in the reactor, and they will sink to the particle discharge port 7 to be discharged from the reactor, but the crystal seed 2 and the magnetic seed 3 that have not adsorbed enough suspended matter and sediment are not enough to escape from the fluidized state by gravity, and will be discharged from the water outlet 8 along with the fluidized bed effluent in the fluidized state, that is, the fluidized bed effluent discharged from the water outlet 8 will contain crystal seeds 2 and magnetic seeds 3 with smaller particles, then the filtering device is set through the water outlet 8, and the crystal seeds 2, magnetic seeds 3 and unabsorbed suspended matter, sediment, etc. in the fluidized bed effluent are filtered and removed, which can improve the quality of the effluent.

[0033] Furthermore, if Figure 1 As shown, the industrial wastewater treatment device also includes a magnetic separation recovery device, which is connected to the particle outlet 7 of the fluidized bed device 1, and is used to perform magnetic seed recovery and crystal recovery on the crystal particles. After the magnetic seed 3 and the crystal seed 2 adsorb suspended matter and sediment in the reactor, they are discharged from the reactor together from the particle outlet 7. At this time, the magnetic seed 3 and the crystal seed 2 will be mixed together. By setting up the magnetic separation recovery device, the magnetic seed 3 and the crystal seed 2 can be separated by the magnetic force generated between the magnetic separation recovery device and the magnetic seed 3, and the magnetic seed 3 can be recovered again for reuse, and the recovered crystal seed 2 can also be used as raw materials for other processes, reducing the cost and reducing the consumption of the magnetic seed 3.

[0034] Furthermore, if Figure 1 As shown, the industrial wastewater treatment device also includes a regulating tank, the outlet of which is connected to the raw water inlet 6 of the fluidized bed device 1, and the regulating tank is used to make the water quality uniform and remove sediments in the water. Before the industrial wastewater enters the treatment device, the industrial wastewater is first passed into the regulating tank, and then the treated industrial wastewater is passed from the regulating tank to the raw water inlet 6. The regulating tank can store the industrial wastewater in advance, and the industrial wastewater can also be pre-regulated in the regulating tank, for example, the PH of the industrial wastewater in the regulating tank is pre-regulated, large suspended matter and sediment are removed, and preliminary biological regulation of organic wastewater is performed, that is, the wastewater quality of the fluidized bed is stabilized by pre-regulation. After the wastewater is stable, the flow rate of the wastewater entering the reactor can be stably controlled when the wastewater in the regulating tank is passed into the reactor from the raw water inlet 6, so as to prevent the treatment effect from being affected by water quality fluctuations, thereby stabilizing the PH and turbidity of the wastewater and improving the treatment effect and efficiency.

[0035] Furthermore, if Figure 2As shown, the magnetic seed crystal feed port 4 and the water outlet 8 are both arranged at the top of the reactor, the drug addition port 5 is arranged in the middle of the reactor, and the particle discharge port 7 and the raw water inlet 6 are arranged at the bottom of the reactor. The particle discharge port 7 is arranged at the bottom of the device, the water outlet 8 is arranged at the top of the device, and the raw water inlet 6 is arranged in the middle of the side wall of the device. In this way, the crystal seeds 2 and the magnetic seeds 3 in the reactor can be fluidized by adopting the method of lower water inlet and upper water discharge, combined with the control of the water inlet speed, and the residence time of the wastewater in the reactor can be extended, that is, the wastewater treatment time is increased to improve the wastewater treatment effect. The particle discharge port 7 is arranged at the bottom, and the magnetic seeds 3 and the crystal seeds 2 gradually absorb suspended matter and sediment in the fluidized state. When the weight of the magnetic seeds 3 and the crystal seeds 2 increases to the point where the current flow rate is difficult to position the fluidized state, the magnetic seeds 3 and the crystal seeds 2 sink to the particle discharge port 7 based on gravity and then discharge from the reactor.

[0036] The industrial wastewater treatment device in the above embodiment is used to treat mine wastewater. By adding magnetic seeds 3 to crystal seeds 2 in a fluidized bed reactor and combining the use of reagents, effective removal of suspended matter and hardness in industrial wastewater is achieved. At the same time, the used crystal seeds 2 and magnetic seeds 3 can be separated and recovered. Reuse can reduce treatment costs, improve resource recycling efficiency, and significantly improve the industrial wastewater treatment effect.

[0037] According to another specific embodiment of the present application, a method for treating industrial wastewater is also provided. The method is performed using the industrial wastewater treatment device in the above embodiment. Figure 3 As shown, the method comprises the following steps:

[0038] Step S10: introducing the wastewater to be treated into the fluidized bed device 1, and adding magnetic seeds, crystal seeds and alkaline agents, wherein the magnetic seeds, crystal seeds and alkaline agents are used to react with the suspended matter and hardness of the wastewater to be treated and generate crystalline particles;

[0039] Specifically, the magnetic seeds are physically adsorbed with suspended matter in the wastewater to be treated, the alkaline agent chemically reacts with calcium and magnesium ions in the wastewater to be treated to form calcium and magnesium ion precipitates, and then the crystal seeds are physically adsorbed with the precipitates. The crystal seeds and the magnetic seeds generate large-particle crystals after adsorbing the suspended matter and the precipitates.

[0040] Step S20: Regulating the pH value and turbidity of the wastewater to be treated to remove suspended matter and hardness in the wastewater to be treated to obtain fluidized bed effluent.

[0041] Specifically, the pH value of the wastewater to be treated can be pre-adjusted in the regulating tank, or the target pH value can be adjusted in the reactor after adding an alkaline agent. The turbidity can be changed by adjusting the flow rate of the fluidized bed, that is, the flow rate of the fluidized bed can be adjusted by adjusting the speed at which the raw water inlet 6 enters the reactor to adjust the turbidity.

[0042] The technical solution of this embodiment is applied, and the wastewater to be treated is introduced into the fluidized bed device 1, and magnetic seeds, crystal seeds and alkaline agents are added. The magnetic seeds, crystal seeds and alkaline agents are used to react with the suspended matter and hardness of the wastewater to be treated and generate crystalline particles; the pH value and turbidity of the wastewater to be treated are adjusted to remove the suspended matter and hardness in the wastewater to be treated, and obtain the fluidized bed effluent. By adjusting the pH value in the wastewater, the hardness in the wastewater is first precipitated, and then the suspended matter and precipitate in the wastewater are adsorbed by the synergistic effect of the magnetic seeds and the crystal seeds. Finally, by adjusting the turbidity of the wastewater, the magnetic seeds and the crystal seeds are easy to discharge after absorbing enough suspended matter and precipitate, which can significantly improve the adsorption effect of suspended matter and hardness, and then improve the removal efficiency of suspended matter and hardness, so that the treated water quality is more stable.

[0043] Optionally, the method further comprises:

[0044] Step S30: filtering the effluent from the fluidized bed to obtain filtered water.

[0045] Specifically, the treated fluidized bed effluent can be further filtered through the filtration process to further remove tiny suspended solids and remaining small particle magnetic seeds and crystal seeds in the effluent, improve the effluent water quality, and ensure that the effluent water quality meets the discharge or reuse standards.

[0046] Optionally, the method further comprises:

[0047] Step S40: performing magnetic seed recovery treatment and crystal seed recovery treatment on the crystal particles discharged from the fluidized bed to obtain recyclable magnetic seeds and crystal seeds.

[0048] Specifically, by utilizing the difference in magnetic characteristics between the magnetic seed and the crystal seed, the magnetic seed and the crystal seed can be recovered through magnetic force, which can not only reduce processing costs, but also achieve resource recycling, reduce consumption, and meet the social needs of resource conservation.

[0049] Optionally, before introducing the wastewater to be treated into the fluidized bed, the method further comprises:

[0050] Step S101: passing the wastewater to be treated into a regulating tank, and passing the effluent from the regulating tank into a fluidized bed.

[0051] Specifically, the wastewater to be treated can be passed into the regulating tank for pretreatment of the wastewater. The pretreatment can achieve parameter adjustment such as pH value pre-adjustment, organic pollutant treatment, temperature adjustment and so on of the wastewater to be treated, which can ensure the stability of the wastewater quality entering the fluidized bed, thereby achieving the stability of the wastewater during fluidization, maintaining the water quality stable, and reducing fluctuations in the sulfidation process.

[0052] Optionally, the seed crystal is any one of calcium carbonate crystal, quartz sand, and garnet, and / or the alkaline agent is any one of NaOH and Na2CO3. For different types of wastewater, selecting appropriate seed crystals and agents can optimize the treatment effect, improve wastewater treatment efficiency, and reduce treatment costs.

[0053] The principles and effects of industrial wastewater treatment methods are as follows:

[0054] By adding alkaline agents through the crystallization granulation method to form low-solubility stable crystals, and by adding crystal seeds to reduce the nucleation energy barrier of calcium and magnesium micro-soluble substances, calcium and magnesium ions are induced to rapidly nucleate and densely grow, and the specific surface area of ​​the suspended matter is changed by adding magnetic seeds to further change the cohesion of the precipitated particles on the surface of the suspended matter. And by regulating the pH, fluidization state and turbidity of the mine water system, the quality of the effluent is controlled, and the mine water containing a certain concentration of suspended matter and hardness is removed in one step. After treatment, most of the carbonate hardness in the water is removed, and the residual carbonate hardness of the effluent is 0.05-1mmol / L, the turbidity removal rate is greater than 60%, and the pH is ≈ 9.5-10.5. Therefore, the method has a good effect of removing hardness and turbidity, and does not require the addition of coagulants and coagulants. It has the advantages of small dosage and low cost, compact equipment, small footprint, and simple process flow.

[0055] After the industrial wastewater is treated by the industrial wastewater treatment method in the embodiment, the effluent water quality is tested and compared with the comparative example through the following embodiment:

[0056] Example 1

[0057] The treatment scale is 2t / h of mine water, with a total hardness of 89mg / L (CaCO3), alkalinity of 160mg / L (CaCO3), pH7.8, and turbidity of 75NTU (Nephelometric Turbidity Units). The fluidized bed integrated treatment device is used to add magnetic seeds, 76.0mg / L NaOH softening agent and calcium carbonate seeds. By adjusting the pH and turbidity of the mine water system, the hardness and suspended matter are removed in one step. After treatment, most of the carbonate hardness and turbidity in the water are removed, the residual carbonate hardness is 9.2mg / L, the effluent turbidity is 6.9NTU, and the pH is 9.6.

[0058] Example 2

[0059] The treatment scale of mine water is 2t / h, with a total hardness of 187mg / L (CaCO3), alkalinity of 332mg / L (CaCO3), pH 8.2, and turbidity of 25NTU. The fluidized bed integrated treatment device is used, and magnetic seeds, 148mg / L NaOH softening agent and quartz sand seeds are added. By adjusting the pH and turbidity of the mine water system, the hardness and suspended matter are removed in one step. After treatment, most of the carbonate hardness and turbidity in the water are removed, the residual carbonate hardness is 13.2mg / L, the effluent turbidity is 4.3NTU, and the pH is 10.

[0060] Example 3

[0061] The treatment scale is 2t / h of mine water, with a total hardness of 246mg / L (CaCO3), alkalinity of 170mg / L (CaCO3), pH 8.0, and turbidity of 105NTU. An integrated hardness and suspended solids treatment device is used, and magnetic seeds, 115mg / L NaOH, 214mg / L Na2CO3 softening agent and garnet seeds are added. By adjusting the pH and turbidity of the mine water system, the hardness and suspended solids are removed in one step. After treatment, most of the carbonate hardness and turbidity in the water are removed, the residual carbonate hardness is 10.6mg / L, the effluent turbidity is 16NTU, and the pH is 10.2.

[0062] Comparative Example 1

[0063] The treatment scale is 2t / h of mine water, with total hardness of 89mg / L (CaCO3), alkalinity of 160mg / L (CaCO3), pH7.8, turbidity of 75NTU. Fluidized bed integrated treatment device is used, 76.0mg / L of NaOH softening agent and calcium carbonate seeds are added, and the pH and turbidity of the mine water system are adjusted. After the system is stabilized, the residual carbonate hardness of the effluent is 17.6mg / L, the effluent turbidity is 44NTU, and the pH is 9.3.

[0064] Comparative Example 2

[0065] The treatment scale is 2t / h of mine water, with total hardness of 187mg / L (CaCO3), alkalinity of 332mg / L (CaCO3), pH8.2, and turbidity of 25NTU. A fluidized bed integrated treatment device is used, 148mg / L of NaOH softening agent and quartz sand seeds are added, and the pH and turbidity of the mine water system are adjusted. After the system is stabilized, the residual carbonate hardness of the effluent is 25.9mg / L, the effluent turbidity is 11.1NTU, and the pH is 9.6.

[0066] Comparative Example 3

[0067] The treatment scale is 2t / h of mine water, with a total hardness of 246mg / L (CaCO3), alkalinity of 170mg / L (CaCO3), pH8.0, and turbidity of 105NTU. An integrated hardness suspended solids treatment device is used, and 115mg / L of NaOH and 214mg / L of Na2CO3 softening agent and garnet seeds are added. By adjusting the pH and turbidity of the mine water system, after the system is stabilized, the residual carbonate hardness of the effluent is 44.1mg / L, the effluent turbidity is 45NTU, and the pH is 9.6.

[0068] Through the results of the above embodiments and comparative examples, it can be seen that the industrial wastewater treatment device and method of the present application have the following effects:

[0069] 1) Effect of removing carbonate hardness: In the embodiment, after the mine water is treated, the residual carbonate hardness is significantly reduced, and the residual values ​​are 9.2 mg / L, 13.2 mg / L and 10.6 mg / L, respectively. This indicates that the present scheme has a high efficiency in hardness removal, which is much lower than the residual carbonate hardness in the comparative example (17.6 mg / L, 25.9 mg / L and 44.1 mg / L).

[0070] 2) The degree of turbidity reduction: In the examples, the effluent turbidity was reduced to 6.9NTU, 4.3NTU and 16NTU, respectively. Compared with the effluent turbidity in the comparative example (44NTU, 11.1NTU and 45NTU), the examples performed better in turbidity removal, especially in the treatment of mine water with high turbidity (105NTU), the turbidity removal effect was more significant.

[0071] 3) Control of pH value: The pH value of the effluent in the embodiment is stable between 9.6 and 10.2, while the pH value of the comparative example is lower and has a larger fluctuation range (9.3 to 9.6). This shows that the fluidized bed integrated treatment device using magnetic seeds and specific crystal seeds can more effectively control the pH value in the water treatment process, keeping it within a suitable range, which is more beneficial for the subsequent treatment process.

[0072] 4) Reagent consumption and cost: In the embodiment, the fluidized bed integrated treatment device with magnetic seeds and crystal seeds is used to effectively reduce the consumption of reagents (such as NaOH and Na2CO3), thereby reducing the overall reagent cost, while avoiding the generation of a large amount of high-water sludge, saving the cost and space of subsequent sludge treatment.

[0073] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0074] In addition to the above, it should be noted that "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or characteristics described in conjunction with the embodiment included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of the present invention.

[0075] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An industrial wastewater treatment device, characterized in that: The device comprises: A fluidized bed device (1), the fluidized bed device (1) at least comprising a reactor, the reactor comprising a raw water inlet (6), a drug addition port (5), a magnetic seed crystal addition port (4), a particle discharge port (7) and a water outlet (8), the raw water inlet (6) being used to introduce wastewater to be treated into the reactor, the drug addition port (5) being used to introduce a reagent into the reactor, the magnetic seed crystal addition port (4) being used to introduce a magnetic seed (3) and a crystal seed (2), the particle discharge port (7) being used to discharge crystallized particles, and the water outlet (8) being used to discharge fluidized bed effluent, the fluidized bed effluent being effluent after the wastewater to be treated reacts with the reagent, the magnetic seed (3) and the crystal seed (2).

2. The industrial wastewater treatment device according to claim 1, characterized in that: The industrial wastewater treatment device also includes: A filtering device is arranged in communication with the water outlet (8) of the fluidized bed device (1), and is used to filter the water outlet of the fluidized bed.

3. The industrial wastewater treatment device according to claim 1, characterized in that: The industrial wastewater treatment device also includes: A magnetic separation recovery device is provided, the magnetic separation recovery device is connected to the particle discharge port (7) of the fluidized bed device (1), and the magnetic separation recovery device is used to perform magnetic seed recovery processing and crystal recovery processing on the crystallized particles.

4. The industrial wastewater treatment device according to claim 1, characterized in that: The industrial wastewater treatment device also includes: A regulating tank, wherein the water outlet of the regulating tank is connected to the raw water inlet (6) of the fluidized bed device (1), and the regulating tank is used to make the water quality uniform and remove sediments in the water.

5. The industrial wastewater treatment device according to claim 1, characterized in that: The magnetic seed crystal feeding port (4) and the water outlet (8) are both arranged at the top of the reactor, the drug adding port (5) is arranged at the middle of the reactor, and the particle discharge port (7) and the raw water inlet (6) are arranged at the bottom of the reactor.

6. A method for treating industrial wastewater, characterized in that: The method is carried out using the industrial wastewater treatment device described in any one of claims 1 to 5, and the method comprises the following steps: The wastewater to be treated is introduced into the fluidized bed device (1), and magnetic seeds, crystal seeds and alkaline agents are added, wherein the magnetic seeds, crystal seeds and alkaline agents are used to react with the suspended matter and hardness of the wastewater to be treated to generate the crystalline particles; The pH value and turbidity of the wastewater to be treated are regulated to remove suspended matter and hardness in the wastewater to be treated to obtain fluidized bed effluent.

7. The industrial wastewater treatment method according to claim 6, characterized in that: The method further comprises: The effluent from the fluidized bed is filtered to obtain filtered water.

8. The method for treating industrial wastewater according to claim 6, characterized in that: The method further comprises: The crystal particles discharged from the fluidized bed are subjected to magnetic seed recovery treatment and crystal seed recovery treatment to obtain recyclable magnetic seeds and crystal seeds.

9. The method for treating industrial wastewater according to claim 6, characterized in that: Before introducing the wastewater to be treated into the fluidized bed, the method further comprises: The wastewater to be treated is introduced into a regulating tank, and the effluent from the regulating tank is introduced into the fluidized bed.

10. The industrial wastewater treatment method according to claim 6, characterized in that: The seed crystal is any one of calcium carbonate crystal, quartz sand, and garnet, and / or the alkaline agent is any one of NaOH and Na2CO3.

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