High-density sedimentation tank for desalting

Abstract

The high-density sedimentation tank comprises a treatment assembly, the treatment assembly comprises a coagulation tank, one side of the coagulation tank is provided with a reaction tank, one side of the reaction tank is provided with a flocculation tank, one side of the flocculation tank is provided with a sedimentation tank, and the bottom of the sedimentation tank is provided with a sewage discharge part used for discharging sludge. A backflow piece for sludge backflow is arranged at the bottom of the precipitation tank, and a water outlet tank for draining water is arranged on one side of the precipitation tank; the backflow piece comprises a backflow pipe arranged at the bottom end of the precipitation tank. According to the utility model, through the design of the return pipe and the sludge return pump, salt in wastewater is converted into insoluble substances by adding chemicals, the salt in the wastewater is removed after coagulating sedimentation, and when sludge is discharged out of the sedimentation tank, part of the sludge is input into the reaction tank again through the return pipe and the sludge return pump; unreacted chemicals in the sludge are reused, so that the utilization rate of the chemicals is increased, and the waste of the chemicals is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to a high-density sedimentation tank for desalination. Background Art

[0002] Wastewater with high salinity and turbidity refers to wastewater with high salt and suspended matter concentrations in water treatment.

[0003] When desalting wastewater with high salinity and turbidity, the traditional desalination method is to directly input water into the sedimentation tank through a pipe, and add reagents to react with the wastewater, so as to remove the salt in the wastewater through precipitation, and finally precipitate the salt-containing insoluble matter into sludge and discharge it directly. However, when it is discharged, there is unreacted reagent in the sludge, which causes waste of reagents during use. Utility Model Content

[0004] The purpose of the utility model is to provide a high-density sedimentation tank for desalination to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-density sedimentation tank for desalination, comprising a treatment component, wherein the treatment component comprises a coagulation tank, a reaction tank is arranged on one side of the coagulation tank, a flocculation tank is arranged on one side of the reaction tank, a sedimentation tank is arranged on one side of the flocculation tank, a sewage discharge part for discharging sludge is arranged at the bottom of the sedimentation tank, a reflux part for sludge reflux is arranged at the bottom of the sedimentation tank, and a water outlet tank for drainage is arranged on one side of the sedimentation tank;

[0006] The reflux component comprises a reflux pipe arranged at the bottom end of the sedimentation tank, one end of the reflux pipe is inserted and connected to the inner wall of the bottom end of the reaction tank, and a sludge reflux pump is arranged in the middle of the reflux pipe.

[0007] Preferably, the sewage discharge member comprises a sewage discharge pipe arranged at the bottom end of the sedimentation tank, and a sewage discharge pump is arranged in the middle of the sewage discharge pipe.

[0008] Preferably, the tops of the coagulation tank, the reaction tank and the flocculation tank are all provided with stirring structures for stirring the wastewater, and the top of the sedimentation tank is provided with a scraper for scraping mud.

[0009] Preferably, a central flow guide tube is provided inside the reaction tank, and one of the stirring structures is inserted and connected inside the central flow guide tube.

[0010] Preferably, the tops of the coagulation tank, reaction tank and flocculation tank are all provided with feeding pipes for controlling the entry of the reagents.

[0011] Preferably, a water baffle for blocking water flow is provided on the top of the coagulation tank, a protective piece for protecting the water baffle is provided on one side of the water baffle, a central baffle is provided on one side of the reaction tank, and a flow limiting plate for blocking water flow is provided on one side of the flocculation tank.

[0012] Preferably, the protective member includes a guide plate arranged on one side of the water baffle, the horizontal longitudinal interface of the guide plate is arranged in an arc shape, a fixed block is fixedly connected to one side of the water baffle, a positioning block is fixedly connected to one side of the guide plate, a positioning groove is opened in the middle of the fixed block, the positioning block is inserted and connected to the inside of the positioning groove, and an elastic block is fixedly connected to one side of the positioning block.

[0013] Technical effects and advantages of the utility model:

[0014] The utility model adopts the design of a reflux pipe and a sludge reflux pump, and by adding chemicals, the salt in the wastewater is converted into insoluble substances, and the salt in the wastewater is removed after coagulation and sedimentation. When the sludge is discharged from the sedimentation tank, part of the sludge is re-input into the reaction tank through the reflux pipe and the sludge reflux pump, and the unreacted chemicals in the sludge are reused, thereby improving the utilization rate of the chemicals and reducing the waste of the chemicals. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the principle of the utility model.

[0016] Figure 2 It is a partial three-dimensional structural schematic diagram of the utility model.

[0017] Figure 3 It is a partial front cross-sectional structural schematic diagram of the utility model.

[0018] In the figure: 1. treatment component; 101. coagulation tank; 102. reaction tank; 103. flocculation tank; 104. sedimentation tank; 2. return part; 201. return pipe; 202. sludge return pump; 3. sewage discharge part; 301. sewage pipe; 302. sewage pump; 4. outlet tank; 5. stirring structure; 6. scraper; 7. feed pipe; 8. water baffle; 9. protective part; 901. guide plate; 902. fixing block; 903. positioning block; 904. positioning groove; 905. elastic block; 10. central guide pipe; 11. central baffle; 12. flow limiting plate. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] The utility model provides Figure 1-3 A high-density sedimentation tank for desalination is shown, comprising a treatment component 1, wherein the treatment component 1 comprises a coagulation tank 101, a reaction tank 102 is arranged on one side of the coagulation tank 101, a flocculation tank 103 is arranged on one side of the reaction tank 102, a sedimentation tank 104 is arranged on one side of the flocculation tank 103, a sewage discharge component 3 for discharging sludge is arranged at the bottom of the sedimentation tank 104, a return component 2 for sludge return is arranged at the bottom of the sedimentation tank 104, and an outlet tank 4 for drainage is arranged on one side of the sedimentation tank 104; the return component 2 comprises a return pipe 201 arranged at the bottom end of the sedimentation tank 104, one end of the return pipe 201 is inserted and connected to the inner wall at the bottom end of the reaction tank 102, a sludge return pump 202 is arranged in the middle of the return pipe 201, and the sewage discharge component 3 comprises a sewage pipe 301 arranged at the bottom end of the sedimentation tank 104, and a sewage pump 302 is arranged in the middle of the sewage pipe 301.

[0021] It should be noted that the settling tank 104 is an inclined tube settling tank, and a water inlet pipe is provided on one side of the coagulation tank 101. When the wastewater needs to be treated, the wastewater is input into the coagulation tank 101 through the water inlet pipe, and the salt-containing insoluble matter in the wastewater is flocculated into sludge through the wastewater treatment of the coagulation tank 101, the reaction tank 102, the flocculation tank 103 and the settling tank 104, so that part of the sludge is re-input into the reaction tank 102 through the return pipe 201 and the sludge return pump 202, so that the flocculant that has not fully reacted continues to participate in the flocculation reaction. Improve the sedimentation efficiency and reduce the waste of flocculants. Part of it is discharged through the sewage pipe 301 and the sewage pump 302 to complete the treatment of the sludge at the bottom of the sedimentation tank 104. The sludge return pump 202 and the sewage pump 302 are both existing sludge pumps; the water outlet tank 4 set on one side of the sedimentation tank 104 is used to discharge the water in the sedimentation tank 104. A filtering component for filtering sewage, such as a filter screen or other filtering components, can be set between the sedimentation tank 104 and the water outlet tank 4 to avoid the situation where unreacted sewage is directly discharged.

[0022] Specifically, the tops of the coagulation tank 101, the reaction tank 102 and the flocculation tank 103 are all provided with stirring structures 5 for stirring wastewater, the top of the sedimentation tank 104 is provided with a scraper 6 for scraping mud, the interior of the reaction tank 102 is provided with a central guide pipe 10, one of the stirring structures 5 is inserted and connected to the interior of the central guide pipe 10, and the tops of the coagulation tank 101, the reaction tank 102 and the flocculation tank 103 are all provided with a feeding pipe 7 for controlling the entry of chemicals.

[0023] It should be noted that a control valve for controlling the dropping of reagents is provided in the middle of the feed pipe 7, and the required amount of reagents is controlled by controlling the valve. The feed pipe 7 includes a coagulant feeding pipe provided at the top of the coagulation tank 101, a lime feeding pipe and a sodium carbonate feeding pipe provided at the top of the reaction tank 102, and a flocculant feeding pipe provided at the top of the flocculation tank 103. Different reagents are respectively input into different tank bodies through multiple feed pipes 7; the stirring structure 5 is composed of a stirring motor, a stirring rod and a stirring fan blade. When stirring is required, the stirring motor drives the stirring rod at its output end to rotate, and the stirring rod drives the stirring fan blade to stir in the wastewater; the scraper 6 is an existing In some scraping equipment, the scraper 6 is installed on the top of the sedimentation tank 104. Its core components include a scraper and a driving structure that drives the scraper to rotate. The scraper is usually set horizontally or inclined and can move at the bottom of the pool. The scraper is driven by a driving device (such as an electric motor) to make a spiral motion, so that the scraper can scrape up the sludge deposited at the bottom and move the sludge to one side; a stirring structure 5 is set inside the central guide pipe 10. When in use, the stirring inside the central guide pipe 10 can maintain the uniform flow of sewage and reduce the blockage caused by the accumulation of sludge or other solid matter in the central guide pipe 10, which helps to maintain the stable operation of sewage treatment and reduce the frequency of maintenance and cleaning.

[0024] Furthermore, when wastewater with high salinity and turbidity enters the coagulation tank 101 through the water inlet pipe, a coagulant is first added into the coagulation tank 101 to coagulate the colloid in the wastewater into suspended matter, and then the wastewater enters the reaction tank 102, where lime and sodium carbonate are added to convert the salt (mainly Ca+, Mg+) in the wastewater into insoluble matter such as calcium carbonate and magnesium hydroxide, and then the wastewater enters the flocculation tank 103, where a flocculant is added to flocculate the insoluble matter into flocs to accelerate precipitation, and finally the wastewater enters the inclined tube sedimentation tank 104, where the salt-containing insoluble matter is precipitated into sludge through the inclined tube, thereby achieving the purpose of removing salt. The sludge is discharged through the scraper 6, and a small amount of sludge is refluxed at the same time, so that the flocculant that has not fully reacted continues to participate in the flocculation reaction, thereby improving the sedimentation efficiency.

[0025] Specifically, a water baffle 8 for blocking water flow is arranged on the top of the coagulation tank 101, a protective member 9 for protecting the water baffle 8 is arranged on one side of the water baffle 8, a central baffle 11 is arranged on one side of the reaction tank 102, and a flow limiting plate 12 for blocking water flow is arranged on one side of the flocculation tank 103.

[0026] It should be noted that the water baffle 8 is located on one side of the coagulant feeding pipe, and is used to prevent the water passing through the water inlet pipe from directly flushing the coagulant inside the coagulation tank 101 into the reaction tank 102. The flow rate of the sewage is slowed down by the blocking of the water baffle 8; the protective member 9 is used to protect the water baffle 8 and reduce the impact of the sewage entering the coagulation tank 101 through the water inlet pipe on the water baffle 8.

[0027] Specifically, the protective member 9 includes a guide plate 901 arranged on one side of the water baffle 8, the horizontal longitudinal cross-section of the guide plate 901 is arranged to be arc-shaped, a fixing block 902 is fixedly connected to one side of the water baffle 8, a positioning block 903 is fixedly connected to one side of the guide plate 901, a positioning groove 904 is opened in the middle of the fixing block 902, the positioning block 903 is inserted and connected to the inside of the positioning groove 904, and an elastic block 905 is fixedly connected to one side of the positioning block 903.

[0028] It should be noted that the guide plate 901 with an arc-shaped horizontal longitudinal section is used to guide the water to the top and bottom of the guide plate 901 through the arc surface when the water flows into contact with the guide plate 901; the horizontal longitudinal sections of the positioning block 903 and the positioning groove 904 are both convex, and the position of the positioning block 903 is limited by the convex positioning groove 904, so that it can slide and be connected inside the positioning groove 904 and cannot be moved out of the positioning groove 904; the elastic block 905 is made of rubber material, so that the elastic block 905 will be deformed when squeezed; when the guide plate 901 is driven by sewage to impact one side of the water baffle 8, the guide plate 901 drives the positioning block 903 to be squeezed toward one side of the elastic block 905, and the elastic block 905 absorbs the impact of the guide plate 901 through deformation, thereby reducing the impact of the sewage on the water baffle 8 and protecting the water baffle 8.

[0029] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-density sedimentation tank for desalination, characterized in that: The treatment component (1) comprises a coagulation tank (101), a reaction tank (102) is arranged on one side of the coagulation tank (101), a flocculation tank (103) is arranged on one side of the reaction tank (102), a sedimentation tank (104) is arranged on one side of the flocculation tank (103), a sewage discharge member (3) for discharging sludge is arranged at the bottom of the sedimentation tank (104), a return member (2) for sludge return is arranged at the bottom of the sedimentation tank (104), and a water outlet tank (4) for drainage is arranged on one side of the sedimentation tank (104); The reflux member (2) comprises a reflux pipe (201) arranged at the bottom end of the sedimentation tank (104), one end of the reflux pipe (201) is inserted and connected to the inner wall of the bottom end of the reaction tank (102), and a sludge reflux pump (202) is arranged in the middle of the reflux pipe (201).

2. A high-density sedimentation tank for desalination according to claim 1, characterized in that: The sewage discharge member (3) comprises a sewage discharge pipe (301) arranged at the bottom end of the sedimentation tank (104), and a sewage discharge pump (302) is arranged in the middle of the sewage discharge pipe (301).

3. A high-density sedimentation tank for desalination according to claim 1, characterized in that: The tops of the coagulation tank (101), the reaction tank (102) and the flocculation tank (103) are all provided with stirring structures (5) for stirring wastewater, and the top of the sedimentation tank (104) is provided with a scraper (6) for scraping mud.

4. A high-density sedimentation tank for desalination according to claim 3, characterized in that: A central flow guide tube (10) is arranged inside the reaction tank (102), and one of the stirring structures (5) is inserted and connected inside the central flow guide tube (10).

5. A high-density sedimentation tank for desalination according to claim 1, characterized in that: The tops of the coagulation tank (101), the reaction tank (102) and the flocculation tank (103) are all provided with feeding pipes (7) for controlling the entry of the reagents.

6. A high-density sedimentation tank for desalination according to claim 1, characterized in that: A water baffle (8) for blocking water flow is arranged on the top of the coagulation tank (101), a protective member (9) for protecting the water baffle (8) is arranged on one side of the water baffle (8), a central baffle (11) is arranged on one side of the reaction tank (102), and a flow limiting plate (12) for blocking water flow is arranged on one side of the flocculation tank (103).

7. A high-density sedimentation tank for desalination according to claim 6, characterized in that: The protective member (9) comprises a guide plate (901) arranged on one side of a water baffle (8); the horizontal longitudinal interface of the guide plate (901) is arranged in an arc shape; a fixing block (902) is fixedly connected to one side of the water baffle (8); a positioning block (903) is fixedly connected to one side of the guide plate (901); a positioning groove (904) is provided in the middle of the fixing block (902); the positioning block (903) is inserted and connected inside the positioning groove (904); and an elastic block (905) is fixedly connected to one side of the positioning block (903).

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