A device for removing hardness of wastewater dosing medium

Abstract

The utility model relates to a hardness removal device for wastewater dosing medium, including an equipment body, wherein a water outlet weir, a special-shaped inclined plate area, a crystallization and separation area, and a crystal nucleus mud storage area are sequentially arranged inside the equipment body from top to bottom, the water outlet weir is provided with a water outlet, the crystallization and separation area is provided with a reagent mixed crystal nucleus initial coagulation system, the reagent mixed crystal nucleus initial coagulation system is provided with a coagulant dosing and flushing port, a flocculant dosing port and a medium dosing port from top to bottom, the bottom of the reagent mixed crystal nucleus initial coagulation system is connected to a mixer, the mixer is provided with a total water inlet, the mixer is provided with a chemical agent dosing port, and the bottom of the crystal nucleus mud storage area is provided with a mud discharge port. The heterogeneous nucleation reaction of this device has the advantages of rapid nucleation, good precipitation effect, and small dosage of reagents.

Description

Technical Field

[0001] The utility model belongs to the technical field of wastewater treatment, and in particular relates to a device for removing hardness of a wastewater dosing medium. Background Art

[0002] At present, some wastewater in wastewater treatment has high hardness. If it is not treated, it will have a bad impact on the subsequent wastewater treatment units. At present, the mainstream softening and hardness removal processes for wastewater include chemical softening precipitation method, tubular membrane method and resin adsorption method, etc. Among them, the chemical softening precipitation method has low engineering investment, but it occupies a large area and has high operating costs; the tubular membrane method occupies a small area, but the equipment investment is large, and it is generally only used for small water volume systems; the resin adsorption method is generally used as a deep hardness removal of the chemical softening precipitation method or tubular membrane.

[0003] Based on this, in the wastewater hardness removal process, there is an urgent need for a hardness removal system with small footprint, low operating cost and low engineering investment. Utility Model Content

[0004] The purpose of the utility model is to solve the above problems. The present application proposes a hardness removal device for wastewater adding medium, which has a simple structure, is easy to operate, occupies a small area, has a small dosage, and has a low operating cost.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hardness removal device for wastewater dosing medium, comprising an equipment main body, wherein the interior of the equipment main body is provided with a water outlet weir, a special-shaped inclined plate area, a crystallization and separation area, and a crystal nucleus mud storage area in sequence from top to bottom, the water outlet weir is provided with a water outlet, the crystallization and separation area is provided with a reagent mixed crystal nucleus initial coagulation system, the outer wall of the equipment main body is provided with sampling ports at the special-shaped inclined plate area, the crystallization and separation area, and the reagent mixed crystal nucleus initial coagulation system, the reagent mixed crystal nucleus initial coagulation system is provided with a coagulant dosing and flushing port, a flocculant dosing port and a medium dosing port from top to bottom, the bottom of the reagent mixed crystal nucleus initial coagulation system is connected to a mixer, the mixer is provided with a total water inlet, the mixer is provided with a chemical agent dosing port, and the bottom of the crystal nucleus mud storage area is provided with a mud discharge port.

[0006] Further: an exhaust port is provided on the top of the device body.

[0007] Further: a detection instrument installation port for installing pH and temperature detection instruments is provided at the connection between the bottom of the reagent mixed crystal nucleus initial condensation system and the mixer.

[0008] Furthermore: a special-shaped inclined plate is placed in the special-shaped inclined plate area, and the special-shaped inclined plate is composed of a combination of a cylindrical structure and an inclined plate structure.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] This device is based on the mechanism of induced crystallization. It adds pH adjusting agents to wastewater with high hardness to adjust the pH of the wastewater to between 10-11.5, and then adds precipitation agents required for wastewater hardness removal to make the hardness ions (calcium and magnesium ions, etc.) in the wastewater precipitate. Then, by adding certain medium nucleation particles, the hardness ion nuclei in the wastewater react to form crystals quickly. In the nuclear condensation stage, coagulants and flocculants are added to help precipitation. Subsequently, in the granulation area in the equipment, the crystal nuclei become larger and complete the initial separation. Some unseparated crystal nuclei separate the crystals from the wastewater in the crystallization and separation area. The upper layer of clear water will enter the subsequent treatment system. The hardness-removed crystals will be temporarily stored in the crystal nucleus mud storage area and then dehydrated. The heterogeneous nucleation reaction of this device has the advantages of rapid nucleation, good precipitation effect, and small dosage of reagents.

[0011] The device adopts a vertical structure and has a large load. Compared with the traditional hardness removal process of chemical agents plus sedimentation tanks, the device can use a smaller area; the device has mechanical operating equipment inside, so the failure rate is lower and the operation is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only for more clearly illustrating the embodiments of the utility model or the technical solutions in the prior art. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is the process flow chart of the utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the special-shaped inclined plate area of ​​the utility model;

[0016] In the figure: 1-equipment body, 2-water outlet weir, 3-water outlet, 4-special-shaped inclined plate area, 5-crystallization separation area, 6-coagulant dosing and flushing port, 7-medium dosing port, 8-detection instrument installation port, 9-chemical agent dosing port, 10-main water inlet, 11-mixer, 12-crystal nucleus mud storage area, 13-mud discharge port, 14-sampling port, 15-flocculant dosing port, 16-agent mixing crystal nucleus initial coagulation system, 17-exhaust port. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand and implement the technical solution of the utility model, the utility model is further described below in conjunction with specific embodiments. However, the embodiments are only used as an explanation of the utility model and are not intended to limit the utility model.

[0018] like Figure 1 The hardness removal device for wastewater dosing medium shown in the figure is composed of an equipment body and its internal supporting equipment. The interior of the equipment body 1 is provided with a water outlet weir 2, a special-shaped inclined plate area 4, a crystallization and separation area 5, and a crystal nucleus mud storage area 12 from top to bottom. The crystallization and separation area 5 is provided with a reagent mixed crystal nucleus initial condensation system 16. One or more sampling ports 14 are provided on the outer wall of the equipment body 1, and the special-shaped inclined plate area 4, the crystallization and separation area 5, and the reagent mixed crystal nucleus initial condensation system 16. The special-shaped inclined plate area 4 is provided with one, and the upper, middle and lower parts of the crystallization and separation area 5 are provided with sampling ports 14. The upper and lower ends of the reagent mixed crystal nucleus initial condensation system 16 are provided with sampling ports 14.

[0019] The reagent mixed crystal nucleus initial coagulation system 16 is provided with a coagulant dosing and flushing port 6, a flocculant dosing port 15 and a medium dosing port 7 from top to bottom. The bottom of the reagent mixed crystal nucleus initial coagulation system 16 is connected to the mixer 11. The mixer 11 is provided with a total water inlet 10. The mixer 11 is provided with a chemical agent dosing port 9. The bottom of the crystal nucleus mud storage area 12 is provided with a mud discharge port 13.

[0020] The connection between the bottom of the reagent mixing crystal nucleus initial condensation system 16 and the mixer 11 (water inlet point of the reagent mixing crystal nucleus initial condensation system) is provided with a detection instrument installation port 8 for installing pH and temperature detection instruments.

[0021] The function of the reagent mixing crystal nucleus initial coagulation system 16 is to quickly mix the reagents and achieve the initial coagulation of the crystals, thus providing the prerequisite for the rapid growth of the crystals in the later stage.

[0022] like Figure 3 As shown, the special-shaped inclined plate of the special-shaped inclined plate area 4 is an optimized structure based on the combination of the cylindrical structure and the inclined plate structure. The special-shaped inclined plate reduces the dead water area of ​​the inclined plate through special design to ensure efficient separation of wastewater.

[0023] Combination Figure 1 and Figure 2The influent water is added with chemicals through the mixer from the main water inlet and then enters the reagent mixing crystal nucleus initial condensation system from the bottom. Specifically, when the influent water passes through the mixer, a certain amount of calcium hydroxide, sodium hydroxide and sodium carbonate are added through the chemical agent addition port to adjust the pH value of the influent water to between 10.5 and 11.5. The specific type and amount of chemical agents added depend on the quality of the influent water. After the chemical agents are added, the influent water continues to flow upward and continues to add medium through the medium addition port. The type is generally quartz sand particles with a particle size of 20-80 microns. In the crystal nucleus condensation stage, flocculants and coagulants are added from the flocculant delivery port and the coagulant dosing and flushing port to help sedimentation. The water flow changes direction at the top of the reagent mixed crystal nucleus primary condensation system and flows downward to achieve crystal initial condensation and flocculation reaction. Some unseparated crystal nuclei are separated in the crystallization and separation area on the top of the equipment body, and finally flow out through the special-shaped inclined plate area to the water outlet weir and the hardness sludge is discharged from the mud discharge port at the bottom.

[0024] This device adopts a vertical structure and has a larger load. Compared with the traditional hardness removal process of chemical agents plus sedimentation tanks, the wastewater plus medium hardness removal system can use a smaller area.

[0025] The dosage is small, saving reagents. This device is based on the induced crystallization mechanism and does not require excessive dosage of reagents.

[0026] Stable operation, no mechanical running equipment in the device, lower failure rate and more stable operation.

[0027] The contents not described in detail in the present invention are all prior art.

[0028] The above is only a preferred embodiment of the utility model, and is not limited to the description in the specification and implementation. Therefore, any equivalent changes or modifications made according to the structure, features and principles described in the scope of the utility model patent application should be included in the scope of the utility model patent application.

Claims

1. A device for removing hardness of wastewater by adding a medium, comprising a device body (1), characterized in that: The equipment body (1) is provided with a water outlet weir (2), a special-shaped inclined plate area (4), a crystallization and separation area (5), and a crystal nucleus mud storage area (12) in order from top to bottom. The water outlet weir (2) is provided with a water outlet (3). The crystallization and separation area (5) is provided with a reagent mixed crystal nucleus initial condensation system (16). The outer wall of the equipment body (1) is provided with the special-shaped inclined plate area (4), the crystallization and separation area (5), and the reagent mixed crystal nucleus initial condensation system (16). A sampling port is provided. The reagent mixing crystal nucleus initial coagulation system (16) is provided with a coagulant dosing and flushing port (6), a flocculant dosing port (15) and a medium dosing port (7) from top to bottom. The bottom of the reagent mixing crystal nucleus initial coagulation system (16) is connected to a mixer (11). A total water inlet (10) is provided at the mixer (11). A chemical agent dosing port (9) is provided on the mixer (11). A mud discharge port (13) is provided at the bottom of the crystal nucleus mud storage area (12).

2. The device for removing hardness of wastewater by adding medium according to claim 1, characterized in that: An exhaust port (17) is provided on the top of the device body (1).

3. The device for removing hardness of wastewater by adding medium according to claim 1, characterized in that: A detection instrument installation port (8) for installing pH and temperature detection instruments is provided at the connection between the bottom of the reagent mixing crystal nucleus initial coagulation system (16) and the mixer (11).

4. The device for removing hardness of wastewater by adding medium according to claim 1, characterized in that: A special-shaped inclined plate is placed in the special-shaped inclined plate area (4), and the special-shaped inclined plate is composed of a combination of a cylindrical structure and an inclined plate structure.

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