Treatment device for crystallization, granulation and solid-liquid separation of circulating water

Abstract

This invention belongs to the field of water softening treatment technology, specifically providing a treatment device for circulating water crystallization granulation and solid-liquid separation. It includes a crystallization granulation fluidized bed and a solid-liquid separation fluidized bed. The crystallization granulation fluidized bed is used to soften circulating water, causing calcium ions to crystallize and form calcium carbonate particles. The calcium carbonate particles settle to the bottom of the first settling chamber. The settling amount of calcium carbonate particles is detected by a settling thickness detection sensor, and the control module receives the detection value from the settling thickness detection sensor in real time. When the detection value reaches a set value, the control module controls the first electrically controlled drain valve to open via an electrical signal, discharging the settled calcium carbonate particles to a dewatering device. This invention achieves automatic monitoring of calcium carbonate particles through the first electrically controlled drain valve, the settling thickness detection sensor, and the control module, replacing manual observation and manual draining. It offers a higher degree of automation and reduces the adverse effects of untimely or excessively frequent particle discharge.

Description

Technical Field

[0001] This application belongs to the field of water softening technology, and more specifically, relates to a treatment device for circulating water crystallization granulation and solid-liquid separation. Background Technology

[0002] Circulating water is used for equipment cooling and steam transport in industries such as metallurgy, chemical engineering, petroleum, and power generation. During repeated use, circulating water accumulates minerals such as calcium and magnesium, leading to hard water. These minerals easily precipitate at high temperatures, forming scale inside pipes and equipment. Therefore, to prevent scale buildup and blockages, circulating water needs to be softened, and pipes and equipment need to be kept clean.

[0003] Existing technologies for softening circulating water combine crystallization granulation with solid-liquid separation. The main equipment consists of a crystallization granulation fluidized bed and a solid-liquid separation fluidized bed. In the crystallization granulation fluidized bed, seed crystals and alkaline agents are added to the tank to cause calcium ions to precipitate and crystallize into 1-3 mm calcium carbonate particles. The calcium carbonate settles at the bottom of the tank, softening the water. The calcium carbonate particles can be recovered as a usable resource. The softened water then enters the solid-liquid separation fluidized bed, where flocculants or coagulants and microsand are added. Suspended substances in the water settle to the bottom under the action of flocculants, forming sludge. The treated water is then discharged from the top.

[0004] During operation, calcium carbonate particles or sludge will settle at the bottom of the crystallizing granulation fluidized bed. Once the sediment accumulates to a certain amount, it needs to be discharged to a dewatering device for dewatering treatment. If the discharge frequency of sediment (calcium carbonate particles or sludge) is too high, it may result in the discharge of too many small, incompletely crystallized calcium carbonate particles, requiring an increased amount of seed crystals. If the discharge frequency of sediment is too low, excessive sediment accumulation will lead to increased turbidity in the water, increasing the processing burden on subsequent solid-liquid separation and other processes.

[0005] To facilitate operator observation of the amount of calcium carbonate particles or sludge settling at the bottom of the tank, existing technologies include a transparent observation window on the side of the crystallization granulation fluidized bed. Once the settling reaches a certain thickness, the discharge valve at the bottom of the tank needs to be manually opened to release the sediment. This existing technology relies on manual observation for sediment discharge, resulting in a low degree of automation. Utility Model Content

[0006] Based on the above-mentioned technical problems, this application provides a circulating water crystallization granulation and solid-liquid separation treatment device to solve the technical problems of existing technologies where the discharge of sediments depends on manual observation and has a low degree of automation.

[0007] To achieve the above objectives, the technical solution adopted in this application is: to provide a circulating water crystallization granulation and solid-liquid separation treatment device, including a crystallization granulation fluidized bed and a solid-liquid separation fluidized bed connected to the outlet end of the crystallization granulation fluidized bed; wherein, the crystallization granulation fluidized bed includes:

[0008] The first tank has a first processing chamber inside. The top of the first processing chamber is connected to a first water outlet pipe, which is connected to the solid-liquid separation fluidized bed. The side of the first processing chamber is provided with a circulating water inlet, a reagent dosing port and a seed crystal dosing port from bottom to top. The bottom of the first processing chamber forms a first settling chamber, which is connected to a first electrically controlled drain valve.

[0009] A drug delivery unit is located on one side of the first tank, and the discharge end of the drug delivery unit is connected to the drug dosing port;

[0010] A seed crystal dispensing unit is located on one side of the first tank, and the discharge end of the seed crystal dispensing unit is connected to the seed crystal dispensing port; and

[0011] The control unit includes a settling thickness detection sensor and a control module. The settling thickness detection sensor is located in the first settling chamber and is used to detect the thickness of the sediment at the bottom of the first settling chamber. The settling thickness detection sensor and the first electrically controlled drain valve are respectively connected to the control module. The control module is used to receive the detection result of the settling thickness detection sensor and control the first electrically controlled drain valve to open or close according to the detection result.

[0012] In one possible implementation, the settlement thickness detection sensor is an ultrasonic sensor, which is located inside the first processing cavity with its detection end facing downwards.

[0013] In one possible implementation, the settlement thickness detection sensor is a pressure sensor, which is located on the bottom wall of the first settlement cavity, and the detection end protrudes from the bottom wall of the first settlement cavity.

[0014] In one possible implementation, the sidewall of the first processing chamber has multiple drug dosing ports along the circumferential direction, and the drug delivery unit includes:

[0015] The dosing tube is ring-shaped and surrounds the outer periphery of the first tank.

[0016] The reagent delivery pipe is connected to the reagent dosing pipe; and

[0017] Multiple drug nozzles are arranged in a circumferential direction on the drug dosing pipe, with the liquid outlet of each drug nozzle located at the corresponding drug dosing port and the liquid outlet direction being obliquely downward.

[0018] In one possible implementation, multiple drug delivery units are spaced apart along the vertical direction.

[0019] In one possible implementation, the sidewall of the first settling chamber is provided with a transparent first observation window.

[0020] In one possible implementation, the solid-liquid separation fluidized bed includes:

[0021] The second tank has a second processing chamber inside, the top of the second processing chamber is connected to a second water outlet pipe, the bottom of the second processing chamber forms a second settling chamber, and the second settling chamber is connected to a second drain valve.

[0022] A soft water inlet pipe has one end connected to the lower part of the second treatment chamber near the second settling chamber, and the other end equipped with a T-connector. The outlet end of the T-connector is connected to the soft water inlet pipe, and one of the inlet ends of the T-connector is connected to the first outlet pipe; and

[0023] The separation medium delivery pipe is connected to the other water inlet of the tee joint and is used to deliver one or more of the following: micro-sand, flocculant, and coagulant aid.

[0024] In one possible implementation, the separating medium delivery pipe is connected to the soft water input pipe via a connecting elbow. The connecting elbow is provided with a mounting seat in a direction parallel to the soft water input pipe. The mounting seat is hollow inside and forms an installation channel, which is connected to the inner cavity of the connecting elbow.

[0025] The solid-liquid separation fluidized bed further includes a premixing unit, which comprises:

[0026] A rotating shaft, one end of which is located within the mounting channel, and the other end extending along the mounting channel into the soft water inlet pipe, and having stirring blades; and

[0027] A drive motor, located on the mounting base, is used to drive the rotating shaft to rotate around its own axis.

[0028] In one possible implementation, the solid-liquid separation fluidized bed further includes:

[0029] An inner cylinder is coaxially disposed inside the second processing chamber. The top of the inner cylinder is open and spaced a predetermined distance from the top of the second processing chamber. The lower end of the inner cylinder is connected to the soft water input pipe.

[0030] A stirring unit is located at the top of the second tank. The stirring unit includes a stirring rod extending from top to bottom into the inner cylinder, and a stirring motor for driving the stirring rod to rotate about its own axis.

[0031] In one possible implementation, the second drain valve is an electrically controlled drain valve.

[0032] Compared with the prior art, the beneficial effects of the circulating water crystallization granulation and solid-liquid separation treatment device provided in this application are:

[0033] The circulating water crystallization granulation and solid-liquid separation treatment device provided in this application includes a crystallization granulation fluidized bed and a solid-liquid separation fluidized bed. The crystallization granulation fluidized bed is used to soften the circulating water, and the solid-liquid separation fluidized bed is used to separate calcium carbonate and suspended solids from the softened water. A first tank is hollow, forming a first treatment chamber. Water enters the first treatment chamber through a circulating water inlet at the bottom and exits through a first water outlet pipe at the top. Alkaline reagents and seed crystals are added into the first treatment chamber through a reagent dosing port and a seed crystal dosing port, causing calcium ions in the water to precipitate and crystallize, reducing the water hardness. After crystallization, calcium ions form calcium carbonate particles, which settle to the bottom of the first settling chamber. The settling thickness is detected by a settling thickness sensor, and the control module receives the detection value from the settling thickness sensor in real time. When the detection value reaches a set value, the control module controls the first electrically controlled drain valve to open via an electrical signal, discharging the settled calcium carbonate particles to a dewatering device.

[0034] This application achieves automatic monitoring of calcium carbonate particles through a first electrically controlled drain valve, a sedimentation thickness detection sensor, and a control module, replacing the manual observation and manual draining operation. It has a higher degree of automation and can reduce the adverse effects of untimely or excessive particle discharge. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 A perspective view of the circulating water crystallization granulation and solid-liquid separation treatment apparatus provided in the embodiments of this application;

[0037] Figure 2 A front view of the circulating water crystallization granulation and solid-liquid separation treatment apparatus provided in the embodiments of this application;

[0038] Figure 3 A top view of the circulating water crystallization granulation and solid-liquid separation treatment apparatus provided in the embodiments of this application;

[0039] Figure 4 for Figure 3A three-dimensional sectional view along the AA direction;

[0040] Figure 5 for Figure 3 A three-dimensional sectional view along the BB direction;

[0041] Figure 6 This is a schematic diagram showing the connection between the soft water inlet pipe, the tee connector, the second outlet pipe, and the premixing unit in an embodiment of this application.

[0042] Explanation of reference numerals in the attached figures:

[0043] 10. Crystallization granulation fluidized bed; 11. First tank; 111. First processing chamber; 112. First water outlet pipe; 113. Circulating water inlet; 114. Seed crystal addition port; 115. First settling chamber; 116. First electrically controlled drain valve; 117. First observation window; 118. Second observation window; 12. Reagent delivery unit; 121. Reagent dosing pipe; 122. Reagent delivery pipe; 123. Reagent nozzle; 13. Pressure sensor 20. Solid-liquid separation fluidized bed; 21. Second tank; 211. Second processing chamber; 212. Second settling chamber; 213. Second outlet pipe; 214. Second drain valve; 22. Soft water input pipe; 221. T-joint; 23. Separation medium conveying pipe; 24. Premixing unit; 241. Rotating shaft; 242. Drive motor; 25. Inner cylinder; 26. Stirring unit; 261. Stirring rod; 262. Stirring motor. Detailed Implementation

[0044] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0045] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0046] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0049] Please refer to the following: Figures 1 to 6 The following describes the circulating water crystallization granulation and solid-liquid separation processing device provided in the embodiments of this application.

[0050] Please see Figures 1 to 5 This application provides a circulating water crystallization granulation and solid-liquid separation treatment device, including a crystallization granulation fluidized bed 10 and a solid-liquid separation fluidized bed 20 connected to the water outlet of the crystallization granulation fluidized bed 10.

[0051] The crystallization granulation fluidized bed 10 includes a first tank 11, a reagent delivery unit 12, a seed crystal addition unit, and a control unit. The first tank 11 contains a first processing chamber 111. A first water outlet pipe 112 connects to the top of the first processing chamber 111 and is connected to the solid-liquid separation fluidized bed 20. From bottom to top, the side of the first processing chamber 111 has a circulating water inlet 113, a reagent addition port, and a seed crystal addition port 114. The bottom of the first processing chamber 111 forms a first settling chamber 115, which is connected to a first electrically controlled drain valve 116. The reagent delivery unit 12 is located on one side of the first tank 11, and its discharge end connects to the reagent delivery unit. The system includes a seed crystal feeding unit located on one side of the first tank 11, with its discharge end connected to the seed crystal feeding port 114. The control unit comprises a sedimentation thickness detection sensor and a control module. The sedimentation thickness detection sensor is located in the first sedimentation chamber 115 and is used to detect the thickness of the sediment at the bottom of the first sedimentation chamber 115. The sedimentation thickness detection sensor and the first electrically controlled drain valve 116 are respectively connected to the control module. The control module is used to receive the detection results from the sedimentation thickness detection sensor and control the first electrically controlled drain valve 116 to open or close according to the detection results.

[0052] Compared with the prior art, the beneficial effects of the circulating water crystallization granulation and solid-liquid separation treatment device provided in this application embodiment are:

[0053] The circulating water crystallization granulation and solid-liquid separation treatment device provided in this application embodiment includes a crystallization granulation fluidized bed 10 and a solid-liquid separation fluidized bed 20. The crystallization granulation fluidized bed 10 is used to soften the circulating water, and the solid-liquid separation fluidized bed 20 is used to separate calcium carbonate and suspended solids in the softened water. A first treatment chamber 111 is formed by a hollow first tank 11. Water enters the first treatment chamber 111 through a circulating water inlet 113 at the bottom and exits through a first water outlet pipe 112 at the top. Alkaline reagents and seed crystals are added into the first treatment chamber 111 through a reagent addition port and a seed crystal addition port 114, causing calcium ions in the water to precipitate and crystallize, reducing the water hardness. After crystallization, calcium ions form calcium carbonate particles, which settle to the bottom of a first settling chamber 115. The settling amount of calcium carbonate particles is detected by a settling thickness detection sensor, and the control module receives the detection value from the settling thickness detection sensor in real time. When the detected value reaches the set value, the control module controls the first electrically controlled drain valve 116 to open via an electrical signal, discharging the settled calcium carbonate particles into the dewatering equipment.

[0054] This embodiment of the application realizes automatic monitoring of calcium carbonate particles through a first electrically controlled drain valve 116, a sedimentation thickness detection sensor and a control module, replacing the manual observation and manual sewage discharge operation, which has a higher degree of automation and can reduce the adverse effects of untimely or excessive particle discharge.

[0055] The first tank 11 forms a first processing chamber 111 inside. The first tank 11 can be cylindrical in shape, with a conical or spherical bottom to facilitate the settling and discharge of calcium carbonate crystal particles. The side of the first processing chamber 111 has a circulating water inlet 113, a reagent dosing port, and a seed crystal dosing port 114. The circulating water inlet 113 is connected to a circulating water conveying device, the reagent dosing port is connected to a reagent conveying unit 12, and the seed crystal dosing port 114 is connected to a seed crystal conveying unit.

[0056] The circulating water conveying device, reagent conveying unit 12, and seed crystal conveying unit are all common structural forms of the crystallization granulation fluidized bed 10, and their specific structures and usage methods will not be described in detail. Alkaline reagents and seed crystals can be directly selected from qualified products in the existing technology. The reagents are liquid, and the seed crystals are solid. Seed crystals can be added directly, or they can be mixed with water first, and then transported to the first treatment chamber 111 in liquid form using a particle pump.

[0057] The control unit includes a settling thickness detection sensor and a control module. The settling thickness detection sensor can be an ultrasonic sensor, which is located inside the first processing chamber 111 with its detection end angled downwards towards the first settling chamber 115. The ultrasonic sensor uses the principle of ultrasound to detect the settling thickness of calcium carbonate crystal particles in the first settling chamber 115 and transmits the result to the control module. When the control module determines that the settling layer thickness has reached a preset value, it controls the first electrically controlled drain valve 116 to open. The method by which the control module controls the opening or closing of the first electrically controlled drain valve 116 is existing technology and can be understood and implemented by those skilled in the art.

[0058] It is important to note that the ultrasonic sensor should be positioned above the first settling chamber 115 and can be fixed in place using a bracket or similar device. Since the installation of the bracket and the ultrasonic sensor will affect the settling of calcium carbonate particles at that location, the detection end of the ultrasonic sensor should not be vertically downwards; otherwise, the detection results may be inaccurate. The detection end of the ultrasonic sensor can be angled downwards to detect the thickness of the settling layer in unaffected adjacent locations.

[0059] A flushing water pipe can be installed above the ultrasonic sensor to blow away the calcium carbonate particles accumulated on the support and the ultrasonic sensor, preventing excessive accumulation.

[0060] Alternatively, the sedimentation thickness detection sensor can be a pressure sensor 13. The pressure sensor 13 is located on the bottom wall of the first sedimentation chamber 115, and its detection end should protrude from the bottom wall of the first sedimentation chamber 115 after installation to prevent calcium carbonate particles from remaining in the recessed area. The pressure sensor 13 can be a capacitive or diaphragm type sensor, which senses the pressure changes generated by the sediment through a contact measurement principle to determine the amount of sediment. Both the pressure sensor 13 and the ultrasonic sensor need to be immersed in water after installation, and the sensors should be waterproof and corrosion-resistant. Both the pressure sensor 13 and the ultrasonic sensor can be commercially available products, without restrictions on their specific specifications. When there is too much suspended matter in the water, it may interfere with the ultrasonic sensor; in this case, the ultrasonic sensor is not recommended, and the pressure sensor 13 is preferred.

[0061] Please see Figure 1 , Figure 2 and Figure 4To ensure the medication is added more evenly into the first processing chamber 111, multiple medication inlets are provided on the sidewall of the first processing chamber 111 along the circumferential direction. The medication delivery unit 12 includes a medication dosing pipe 121, a medication delivery pipe 122, and medication nozzles 123. The medication dosing pipe 121 is annular and surrounds the outer periphery of the first tank 11; the medication delivery pipe 122 is connected to the medication dosing pipe 121; multiple medication nozzles 123 are arranged circumferentially on the medication dosing pipe 121, with the liquid outlet of the medication nozzle 123 located at the corresponding medication dosing port, and the liquid outlet direction is obliquely downward.

[0062] The chemical dosing pipe 121 is designed as a ring, and multiple chemical nozzles 123 are installed on it. This helps to disperse the chemical more evenly into the first treatment chamber 111. The liquid outlet direction of the chemical nozzles 123 is designed to be obliquely downward, which helps to mix evenly with the rising water flow. There is no specific limitation on the tilt angle; the user can set it according to the actual situation, for example, it can be tilted at 45 degrees.

[0063] Please see Figure 1 , Figure 2 and Figure 4 When different types of alkaline agents need to be added (such as sodium hydroxide agent, sodium carbonate agent), multiple agent delivery units 12 are arranged at intervals along the vertical direction, and each agent delivery unit 12 is used to add one type of alkaline agent.

[0064] Please see Figure 1 To facilitate inspection by operators, a transparent first observation window 117 is provided on the side wall of the first settling chamber 115. Of course, if necessary, a transparent second observation window 118 can also be provided on the side wall of the first processing chamber 111. Both the first observation window 117 and the second observation window 118 are made of high-pressure resistant glass.

[0065] Please see Figure 1 and Figure 5The solid-liquid separation fluidized bed 20 includes a second tank 21, a soft water inlet pipe 22, and a separation medium conveying pipe 23. A second processing chamber 211 is formed inside the second tank 21. A second outlet pipe 213 is connected to the top of the second processing chamber 211, and a second settling chamber 212 is formed at the bottom of the second processing chamber 211. The second settling chamber 212 is connected to a second drain valve 214. One end of the soft water inlet pipe 22 is connected to the lower part of the second processing chamber 211 near the second settling chamber 212, and the other end is equipped with a three-way connector 221. The outlet end of the three-way connector 221 is connected to the soft water inlet pipe 22, and one of the inlet ends of the three-way connector 221 is connected to the first outlet pipe 112. The separation medium conveying pipe 23 is connected to the other inlet end of the three-way connector 221 and is used to convey one or more of micro-sand, flocculant, and coagulant aid. The second drain valve 214 is a manual or electrically controlled drain valve, used to convey sludge to sludge dewatering equipment.

[0066] The second tank 21 can be cylindrical in shape. The soft water to be treated, micro-sand, flocculant and coagulant aid are added to the second treatment chamber 211 through the separation medium conveying pipe 23 and the soft water input pipe 22. The suspended solids in the water coagulate and settle into the second settling chamber 212 under the action of flocculant and coagulant aid. Due to the high density of micro-sand, the settling of flocs can be accelerated.

[0067] It should be noted that when using this product, micro-sand, flocculant, and coagulant aid can all be added. Adding all of them will result in better performance, but it will also increase the cost. Alternatively, only flocculant and coagulant aid can be added, allowing the suspended solids to agglomerate into flocs and settle naturally to the bottom.

[0068] Considering that sludge will also settle at the bottom of the second settling chamber 212, the above-mentioned control unit can also be installed in the solid-liquid separation fluidized bed 20. The thickness of the settling material can be detected by the settling thickness detection sensor, and the second drain valve 214 can be controlled by the control module to achieve automatic sewage discharge.

[0069] The inlet end of the separation medium conveying pipe 23 is connected to the flocculant conveying device, the coagulant aid conveying device and the micro-sand dosing device. Since the micro-sand is a solid particle, it can be mixed into the water. A particle pump is used to transport the micro-sand and water together to the separation medium conveying pipe 23.

[0070] The various pipes and joints can be connected using common connection methods such as flange connection and threaded connection. As needed, sealing gaskets and sealing rings can be added for sealing to prevent leakage.

[0071] Please see Figure 5 and Figure 6The separation medium conveying pipe 23 is connected to the soft water input pipe 22 through a connecting elbow. The connecting elbow is provided with a mounting seat in a direction parallel to the soft water input pipe 22. The mounting seat can be welded and fixed. The mounting seat is hollow inside and forms an installation channel. The installation channel is connected to the inner cavity of the connecting elbow, so that the rotating shaft 241 can extend from the mounting seat into the interior of the connecting elbow.

[0072] The solid-liquid separation fluidized bed 20 also includes a premixing unit 24, which includes a rotating shaft 241 and a drive motor 242. One end of the rotating shaft 241 is located in the installation channel, and the other end passes through the installation channel into the soft water inlet pipe 22 and has stirring blades. The drive motor 242 is located on the mounting base and is used to drive the rotating shaft 241 to rotate around its own axis. During the rotation of the rotating shaft 241, the stirring blades can mix the water to be treated, flocculant, coagulant aid and micro sand evenly in advance.

[0073] When the separation medium contains fine sand, the stirring blades should be made of steel, which has high structural strength, good wear resistance, and is not easily damaged.

[0074] Please see Figure 5 The solid-liquid separation fluidized bed 20 also includes an inner cylinder 25 and a stirring unit 26. The inner cylinder 25 is coaxially disposed inside the second processing chamber 211 and fixed by a bracket. The top of the inner cylinder 25 is open and spaced at a predetermined distance from the top of the second processing chamber 211. The lower end of the inner cylinder 25 is connected to the soft water input pipe 22. The stirring unit 26 is disposed on the top of the second tank 21. The stirring unit 26 includes a stirring rod 261 extending from top to bottom into the inner cylinder 25, and a stirring motor 262 for driving the stirring rod 261 to rotate around its own axis.

[0075] The water to be treated is mixed with flocculant, coagulant aid, and micro-sand in the soft water inlet pipe 22, and then enters the inner cylinder 25. Inside the inner cylinder 25, it slowly rises to its highest position, allowing the flocs and micro-sand to settle to the bottom of the second settling chamber 212 within the annular space between the inner cylinder 25 and the second tank 21. The stirring unit 26 helps to thoroughly mix the flocculant, coagulant aid, micro-sand, and water. Furthermore, the stirring action accelerates the formation of loose flocs with small gaps and high density under the agitation. When the floc particles are small, a suspended sludge layer forms in the upper part of the first treatment chamber 111. Once the floc particles have accumulated to a certain extent, they settle to the bottom of the second settling chamber 212, forming sludge.

[0076] It is understood that the parts in the above embodiments can be freely combined or deleted to form different combined embodiments. The specific contents of each combined embodiment will not be repeated here. After this description, it can be considered that the present utility model specification has recorded each combined embodiment and can support different combined embodiments.

[0077] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A water circulating crystallization granulation and solid-liquid separation treatment device, characterized in that, The fluidized bed includes a crystallization granulation fluidized bed (10) and a solid-liquid separation fluidized bed (20) connected to the outlet end of the crystallization granulation fluidized bed (10); wherein the crystallization granulation fluidized bed (10) includes: The first tank (11) has a first processing chamber (111) inside. The top of the first processing chamber (111) is connected to a first water outlet pipe (112). The first water outlet pipe (112) is connected to the solid-liquid separation fluidized bed (20). The side of the first processing chamber (111) is provided with a circulating water inlet (113), a reagent dosing port and a seed crystal dosing port (114) from bottom to top. The bottom of the first processing chamber (111) forms a first settling chamber (115). The first settling chamber (115) is connected to a first electrically controlled drain valve (116). A drug delivery unit (12) is located on one side of the first tank (11), and the discharge end of the drug delivery unit (12) is connected to the drug dosing port; A seed crystal feeding unit is located on one side of the first tank (11), and the discharge end of the seed crystal feeding unit is connected to the seed crystal feeding port (114); and The control unit includes a settling thickness detection sensor and a control module. The settling thickness detection sensor is located in the first settling chamber (115) and is used to detect the thickness of the sediment at the bottom of the first settling chamber (115). The settling thickness detection sensor and the first electrically controlled drain valve (116) are respectively connected to the control module. The control module is used to receive the detection result of the settling thickness detection sensor and control the first electrically controlled drain valve (116) to open or close according to the detection result.

2. The apparatus for cyclic water crystallization, granulation and solid-liquid separation according to claim 1, characterized in that, The settlement thickness detection sensor is an ultrasonic sensor, which is located inside the first processing cavity (111) with the detection end facing downwards.

3. The apparatus for cyclic water crystallization, granulation and solid-liquid separation according to claim 1, wherein The settlement thickness detection sensor is a pressure sensor (13), which is located on the bottom wall of the first settlement cavity (115) and the detection end protrudes from the bottom wall of the first settlement cavity (115).

4. The apparatus for cyclic water crystallization, granulation and solid-liquid separation according to claim 1, wherein The sidewall of the first processing chamber (111) is provided with a plurality of drug dosing ports along the circumferential direction, and the drug delivery unit (12) includes: The drug dosing tube (121) is annular and surrounds the outer periphery of the first tank (11); A drug delivery pipe (122) is connected to the drug dosing pipe (121); and Multiple drug nozzles (123) are arranged in the circumferential direction on the drug dosing pipe (121). The liquid outlet of each drug nozzle (123) is located at the corresponding drug dosing port, and the liquid outlet direction is set obliquely downward.

5. The apparatus for cyclic water crystallization, granulation and solid-liquid separation according to claim 1 or 4, wherein The drug delivery unit (12) is provided in multiple units at intervals along the vertical direction.

6. The apparatus for cyclic water crystallization, granulation and solid-liquid separation according to claim 1, wherein The first settling chamber (115) has a transparent first observation window (117) on its side wall.

7. The apparatus for cyclic water crystallization, granulation and solid-liquid separation according to claim 1, wherein The solid-liquid separation fluidized bed (20) includes: The second tank (21) has a second processing chamber (211) inside. The top of the second processing chamber (211) is connected to a second water outlet pipe (213). The bottom of the second processing chamber (211) forms a second settling chamber (212). The second settling chamber (212) is connected to a second drain valve (214). A soft water inlet pipe (22) has one end connected to the lower part of the second treatment chamber (211) near the second settling chamber (212), and the other end is provided with a three-way connector (221). The outlet end of the three-way connector (221) is connected to the soft water inlet pipe (22), and one of the inlet ends of the three-way connector (221) is connected to the first outlet pipe (112); and The separation medium conveying pipe (23) is connected to the other water inlet of the three-way connector (221) and is used to convey one or more of micro-sand, flocculant and coagulant aid.

8. The apparatus for cyclic water crystallization, granulation and solid-liquid separation according to claim 7, wherein The separation medium delivery pipe (23) is connected to the soft water input pipe (22) through a connecting elbow. The connecting elbow is provided with a mounting seat in a direction parallel to the soft water input pipe (22). The mounting seat is hollow inside and forms an installation channel. The installation channel is connected to the inner cavity of the connecting elbow. The solid-liquid separation fluidized bed (20) further includes a premixing unit (24), which comprises: A rotating shaft (241), one end of which is located within the mounting channel, and the other end which extends along the mounting channel into the soft water input pipe (22) and has stirring blades; and A drive motor (242) is provided on the mounting base for driving the rotating shaft (241) to rotate about its own axis.

9. The apparatus for cyclic water crystallization, prilling and solid-liquid separation according to claim 7, wherein The solid-liquid separation fluidized bed (20) also includes: An inner cylinder (25) is coaxially disposed inside the second processing chamber (211). The top of the inner cylinder (25) is open and spaced a predetermined distance from the top of the second processing chamber (211). The lower end of the inner cylinder (25) is connected to the soft water input pipe (22). A stirring unit (26) is disposed at the top of the second tank (21). The stirring unit (26) includes a stirring rod (261) extending from top to bottom into the inner cylinder (25) and a stirring motor (262) for driving the stirring rod (261) to rotate about its own axis.

10. The apparatus for cyclic water crystallization, prilling and solid-liquid separation according to claim 1, characterized in that, The second drain valve (214) is an electrically controlled drain valve.

Images