Novel integrated deep phosphorus removal device

Abstract

The utility model provides a novel integrated deep phosphorus removal device which is characterized by comprising a water collection adjusting unit, a chemical adding reaction unit, a pH adjusting unit, a flocculation reaction unit and an efficient precipitation unit which are connected in sequence, a phosphorus removal agent telescopic perforated branch pipe and an oxidizing agent telescopic perforated branch pipe are arranged in the dosing reaction unit; a V-shaped sedimentation tank and a perforated grid are arranged in the efficient sedimentation unit. According to the utility model, the oxidation efficiency of hypophosphite and phosphite in chemical plating phosphorus-containing wastewater treatment can be improved, the dosage of chemicals can be reduced, and meanwhile, the chemical plating phosphorus-containing wastewater can be effectively treated, and the miniaturization and integration of equipment can be realized.

Description

Technical Field

[0001] The utility model relates to a deep dephosphorization device, more specifically, to a novel integrated deep dephosphorization device. Background Art

[0002] In recent years, with the development of the processing and manufacturing industry, chemical plating has gradually become a cutting-edge process in surface treatment technology. With the large-scale development of the chemical plating industry, the waste and sewage generated in the production are complex in composition, containing high-concentration difficult-to-degrade organic pollutants and inorganic salts (hypophosphites, phosphites, nitrogen-containing substances, etc.), and metal ion concentrations as high as thousands of milligrams per liter (heavy metal ions such as chromium, copper, and nickel). It is a typical high-concentration difficult-to-degrade wastewater, which greatly increases the difficulty of treating phosphorus-containing wastewater from chemical plating. Therefore, research on treatment technology for phosphorus-containing wastewater from chemical plating has become a hot topic at home and abroad.

[0003] In view of the deep treatment of phosphorus-containing wastewater from chemical plating, the main treatment methods currently include chemical precipitation, electrodialysis, micro-electrolysis and advanced oxidation. The chemical precipitation method consumes a large amount of metal ions during the precipitation process, and the metal ions are excessively residual in the water. The resulting precipitate may contain a large amount of metal ions, which is not conducive to the recovery of phosphorus and discharges a lot of sludge; the electrodialysis method is difficult to select ion exchange membranes and optimize process conditions, which is not convenient for widespread application; the micro-electrolysis method has high requirements for electrolytic electrode materials, so it is not conducive to the promotion of this technology; the advanced oxidation method has problems such as easy deactivation of catalysts and low recycling rate in actual application. The utility model aims to solve the problems of large infrastructure footprint, low and unstable deep phosphorus removal efficiency, difficult process optimization, high equipment management, maintenance and treatment costs, and the like. Combined with the water quality characteristics of chemical plating phosphorus-containing wastewater, a continuous integrated deep phosphorus removal device is proposed. The device, by coupling the water treatment agent independently developed by the company specifically for chemical plating phosphorus-containing wastewater, can not only improve the oxidation efficiency of hypophosphite and phosphite and reduce the dosage of the agent, but also realize the effective treatment of chemical nickel plating phosphorus-containing wastewater and the miniaturization and integration of equipment. Summary of the invention

[0004] In order to solve the above technical problems, the utility model provides a new integrated deep phosphorus removal device, which adopts the following technical solutions:

[0005] A novel integrated deep phosphorus removal device is characterized in that it comprises a water collection and regulation unit, a dosing reaction unit, a pH adjustment unit, a flocculation reaction unit and a high-efficiency precipitation unit which are connected in sequence; the dosing reaction unit is provided with a dephosphorization agent telescopic perforated branch pipe and an oxidant telescopic perforated branch pipe; the high-efficiency precipitation unit is provided with a V-shaped sedimentation tank and a perforated grille.

[0006] Furthermore, a water inlet is provided on the water collection and regulation unit; a first flow hole is provided between the water collection and regulation unit and the drug dosing reaction unit, a second flow hole is provided between the drug dosing reaction unit and the pH adjustment unit, a third flow hole is provided between the pH adjustment unit and the flocculation reaction unit, and a fourth flow hole is provided between the flocculation reaction unit and the high-efficiency sedimentation unit; a water outlet is provided above the high-efficiency sedimentation unit, and a mud outlet is provided below the high-efficiency sedimentation unit.

[0007] Furthermore, the water collection and regulation unit is provided with a first acid-base dosing box and a first pH automatic control analyzer; the dosing reaction unit is provided with a dephosphorization agent dosing box and an oxidant dosing box; the pH adjustment unit is provided with a second acid-base dosing box and a second pH automatic control analyzer; and the flocculation reaction unit is provided with a flocculant dosing box.

[0008] Furthermore, the lower ends of the dephosphorizer telescopic perforated branch pipe and the oxidant telescopic perforated branch pipe are provided with a plurality of perforated columns, the perforated columns are spaced at 45°, 60° or 90°, and the spacing between the perforated columns is set according to the amount of flocs generated during the dosing reaction and the volume of the flocs; if the flocs are large and the volume is small, it is recommended that the spacing between the perforated columns is 45° or 60°; if the flocs are small or the volume is large, it is recommended that the spacing between the perforated columns is 60° or 90°.

[0009] Furthermore, aeration plates are respectively provided at the bottom of the water collection and regulation unit and the bottom of the drug addition reaction unit.

[0010] Furthermore, the water collection regulating unit, the drug adding reaction unit, the pH regulating unit and the flocculation reaction unit are respectively provided with a stirrer.

[0011] Furthermore, a perforated aeration pipe is provided below the perforated grid.

[0012] Furthermore, the type of wastewater treated by the device is wastewater containing hypophosphorus and phosphorous.

[0013] Compared with the prior art, the advantages of the present invention are:

[0014] The device provides a high-efficiency, low-consumption wastewater phosphorus removal treatment device, which integrates the water collection and adjustment unit, the dosing reaction unit, the pH adjustment unit, the flocculation reaction unit and the high-efficiency precipitation unit into one unit, thereby reducing the footprint of the equipment and thus reducing the investment cost of the enterprise.

[0015] The device has no secondary pollution in the process of wastewater phosphorus removal, is easy to manage and maintain, and reduces operating costs;

[0016] The dosing reaction unit in the device adopts a telescopic perforated branch pipe. The reagent solution is released to the dosing area through the perforated pipe. Under the mixing disturbance of aeration, the reagent is quickly distributed in the reaction tank, effectively reducing the reaction dead zone, increasing the contact rate between the reagent and the pollutant, and effectively improving the mass transfer effect of the reagent reaction, thereby improving the reagent utilization rate, and saving 10%-30% of the amount of phosphorus removal agent and oxidant;

[0017] The high-efficiency sedimentation unit in the device adopts a vertical and horizontal separation mode. In the vertical direction, under the action of the V-shaped sedimentation tank, large-volume flocs are directly settled to the sludge concentration area below. In the horizontal direction, under the action of the perforated grid, large-volume flocs are intercepted in the vertical sedimentation area and continue to settle, thereby improving the sedimentation efficiency.

[0018] The device has good compatibility and adopts a continuous flow reaction mode. It can couple a variety of functional agents to simultaneously carry out synergistic treatment of multiple target pollutants, achieving high integration of the equipment, stable phosphorus removal effect, and simple operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model. Figure 2 It is a schematic diagram of the lower end of the telescopic perforated branch pipe.

[0020] Among them, 1-water collection and regulation unit, 2-drug dosing reaction unit, 3-pH regulation unit, 4-flocculation reaction unit, 5-high-efficiency sedimentation unit, 6-water inlet, 7-first acid-base dosing box, 8-first pH automatic analyzer, 9-phosphorus removal agent dosing box, 10-oxidant dosing box, 11-phosphorus removal agent telescopic perforated branch pipe, 12-oxidant telescopic perforated branch pipe, 13-second acid-base dosing box, 14-second pH automatic analyzer, 15-flocculant dosing box, 16-aeration plate, 17-water outlet, 18-V-type sedimentation tank, 19-perforated grille, 20-perforated aeration pipe, 21-mud outlet, 22-first flow hole, 23-second flow hole, 24-third flow hole, 25-fourth flow hole, 26-agitator, 27-perforated column. DETAILED DESCRIPTION

[0021] The utility model is further elaborated and illustrated below in conjunction with the accompanying drawings and specific implementation methods.

[0022] like Figure 1As shown, the utility model provides a novel integrated deep phosphorus removal device, which includes a water collection and regulation unit 1, a dosing reaction unit 2, a pH adjustment unit 3, a flocculation reaction unit 4, a high-efficiency sedimentation unit 5, a water inlet 6, a first acid-base dosing box 7, a first pH automatic analyzer 8, a dephosphorus agent dosing box 9, an oxidant dosing box 10, a dephosphorus agent telescopic perforated branch pipe 11, an oxidant telescopic perforated branch pipe 12, a second acid-base dosing box 13, a second pH automatic analyzer 14, a flocculant dosing box 15, an aeration plate 16, a water outlet 17, a V-shaped sedimentation tank 18, a perforated grille 19, a perforated aeration pipe 20, a mud outlet 21, a first flow hole 22, a second flow hole 23, a third flow hole 24, a fourth flow hole 25, an agitator 26, and a perforated column 27.

[0023] The device comprises a water collection and regulation unit 1, a dosing reaction unit 2, a pH regulation unit 3, a flocculation reaction unit 4 and a high-efficiency precipitation unit 5 which are connected in sequence; the dosing reaction unit 2 is provided with a dephosphorization agent telescopic perforated branch pipe 11 and an oxidant telescopic perforated branch pipe 12; the high-efficiency precipitation unit 5 is provided with a V-shaped precipitation tank 18 and a perforated grille 19.

[0024] The water collecting and regulating unit 1 is provided with a water inlet 6; a first flow hole 22 is provided between the water collecting and regulating unit 1 and the dosing reaction unit 2, a second flow hole 24 is provided between the dosing reaction unit 2 and the pH regulating unit 3, a third flow hole 24 is provided between the pH regulating unit 3 and the flocculation reaction unit 4, and a fourth flow hole 25 is provided between the flocculation reaction unit 4 and the high-efficiency precipitation unit 5; a water outlet 17 is provided above the high-efficiency precipitation unit 5, and a mud outlet 21 is provided below the high-efficiency precipitation unit 5; the water collecting and regulating unit 1 is provided with a first acid-base dosing box 7 and a first pH automatic control analyzer 8; the dosing reaction unit 2 is provided with a dephosphorization agent dosing box 9 and an oxidant dosing box 10; the pH regulating unit 3 is provided with a second acid-base dosing box 13 and a second pH automatic control analyzer 14; the flocculation reaction unit 4 is provided with a flocculant dosing box Medicine box 15; the lower ends of the telescopic perforated branch pipe 11 for phosphorus removal and the telescopic perforated branch pipe 12 for oxidant are provided with a plurality of perforated rows 27, the intervals between the perforated rows 27 are 45°, 60° or 90°, and the intervals between the perforated rows 27 are set according to the amount of flocs generated during the dosing reaction and the volume of the flocs; if the flocs are large and small, it is recommended that the intervals between the perforated rows 27 be 45° or 60°; if the flocs are small or large, it is recommended that the intervals between the perforated rows 27 be 60° or 90°; the bottoms of the water collection and regulation unit 1 and the dosing reaction unit 2 are respectively provided with aeration plates 16; the water collection and regulation unit 1, the dosing reaction unit 2, the pH adjustment unit 3 and the flocculation reaction unit 4 are respectively provided with agitators 26; a perforated aeration pipe 20 is provided under the perforated grid 19; the type of wastewater treated by the device is wastewater containing hypophosphorus and subphosphorus.

[0025] The working principle of the device is as follows:

[0026] Phosphorus-containing wastewater enters the water collection and regulation unit 1 from the water inlet 6, and acids and alkalis enter the water collection and regulation unit 1 from the first acid and alkali dosing box 7. They are homogenized under the action of the agitator 26, and the hydraulic retention time is 5 to 10 minutes. At the same time, aeration is enhanced by the aeration disk 16, and the pH value changes in the water collection and regulation unit 1 are monitored by the first pH automatic control analyzer 8.

[0027] The water outlet of the water collecting and regulating unit 1 enters the dosing reaction unit 2 through the first flow hole 22, and the dephosphorizer is accurately released from the dephosphorizer dosing box 9 to the pre-set dosing area through the dephosphorizer telescopic perforated branch pipe 11, and the oxidant is accurately released from the oxidant dosing box 10 to the pre-set dosing area through the oxidant telescopic perforated branch pipe 12. Under the coordination of the aeration of the aeration plate 16 and the agitator 26, the reagent is quickly distributed in the reaction tank, effectively reducing the reaction dead zone, increasing the contact area between the reagent and the pollutant, and effectively improving the mass transfer effect of the reagent reaction, thereby improving the reagent utilization rate.

[0028] The effluent from the dosing reaction unit 2 enters the pH adjustment unit 3 through the second flow hole 23, and the acid and alkali enter the pH adjustment unit 3 from the second acid and alkali dosing box 13 and are homogenized under the action of the agitator. The second pH automatic control analyzer 14 is used to control the pH range of the wastewater between 6.5 and 8.

[0029] The water from the pH adjustment unit 3 enters the flocculation reaction unit 4 through the third flow hole 24, and the flocculant enters the flocculation reaction unit 4 from the flocculant dosing box 15, and is evenly mixed under the action of the agitator 26. The flocculant is used to promote the phosphorus removal agent and phosphate to form flocs through complex reaction, chemical adsorption and mutual bridging action, and the hydraulic retention time is 3 to 10 minutes.

[0030] The effluent from the flocculation reaction unit 4 enters the high-efficiency sedimentation unit 5 through the fourth flow hole 25. The high-efficiency sedimentation unit 5 adopts a vertical and horizontal separation mode. The muddy water is firstly subjected to the action of the V-shaped sedimentation tank 18 in the unit, and some larger flocs are directly settled to the sludge concentration area below. Some larger flocs are intercepted by the perforated grille 19 and continue to settle in the V-shaped sedimentation tank 18, while the perforated grille 19 allows smaller flocs to pass through, and are gradually settled to the sludge concentration area at the bottom through multiple layers of perforated grilles 19. A perforated aeration pipe 20 is arranged below the perforated grille 19, which can effectively prevent the perforated grille 19 from being blocked, while ensuring that smaller flocs are settled to the sludge concentration area below. The sludge is finally discharged from the sludge outlet, and the top is the clear water area, and the clear water flows out from the outlet, thereby achieving mud-water separation.

[0031] At present, the deep treatment of chemical plating phosphorus-containing wastewater has problems such as being unfavorable for phosphorus recovery, difficulty in process optimization, high material requirements, easy deactivation of catalysts, and low recycling rate. The utility model aims to solve the above-mentioned problems such as large infrastructure footprint, low and unstable deep phosphorus removal efficiency, difficulty in process optimization, high equipment management and maintenance and treatment costs. Combined with the water quality characteristics of chemical plating phosphorus-containing wastewater, a continuous integrated deep phosphorus removal device is proposed. The device, by coupling the water treatment agent independently developed by the company specifically for chemical plating phosphorus-containing wastewater, can not only improve the oxidation efficiency of hypophosphite and phosphite, but also save 10%-30% of the amount of phosphorus removal agent and oxidant, and at the same time, it can also achieve effective treatment of chemical nickel plating phosphorus-containing wastewater and miniaturization and integration of equipment. Example

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings 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.

[0033] like Figure 1 As shown, this project adopted the above technical solution to trial-produce a new type of integrated deep phosphorus removal device, and the treatment object is chemical plating phosphorus-containing wastewater.

[0034] The device comprises a water collection and regulation unit 1, a dosing reaction unit 2, a pH regulation unit 3, a flocculation reaction unit 4 and a high-efficiency precipitation unit 5 which are connected in sequence; the dosing reaction unit 2 is provided with a dephosphorization agent telescopic perforated branch pipe 11 and an oxidant telescopic perforated branch pipe 12; the high-efficiency precipitation unit 5 is provided with a V-shaped precipitation tank 18 and a perforated grille 19.

[0035] The water collecting and regulating unit 1 is provided with a water inlet 6; a first flow hole 22 is provided between the water collecting and regulating unit 1 and the dosing reaction unit 2, a second flow hole 24 is provided between the dosing reaction unit 2 and the pH regulating unit 3, a third flow hole 24 is provided between the pH regulating unit 3 and the flocculation reaction unit 4, and a fourth flow hole 25 is provided between the flocculation reaction unit 4 and the high-efficiency precipitation unit 5; a water outlet 17 is provided above the high-efficiency precipitation unit 5, and a mud outlet 21 is provided below the high-efficiency precipitation unit 5; the water collecting and regulating unit 1 is provided with a first acid-base dosing box 7 and a first pH automatic control analyzer 8; the dosing reaction unit 2 is provided with a dephosphorization agent dosing box 9 and an oxidant dosing box 1 0; the pH regulating unit 3 is provided with a second acid-base dosing box 13 and a second pH automatic control analyzer 14; the flocculation reaction unit 4 is provided with a flocculant dosing box 15; the dephosphorization agent telescopic perforated branch pipe 11 and the oxidant telescopic perforated branch pipe 12 are provided with a plurality of perforated columns 27 at the lower ends, and the perforated columns 27 are spaced 60° apart; the water collection regulating unit 1 and the dosing reaction unit 2 are respectively provided with an aeration disk 16 at the bottom; the water collection regulating unit 1, the dosing reaction unit 2, the pH regulating unit 3 and the flocculation reaction unit 4 are respectively provided with a stirrer 26; a perforated aeration pipe 20 is provided under the perforated grid 19; the wastewater type treated by the device is wastewater containing hypophosphorus and subphosphorus.

[0036] Taking a certain electroplating wastewater treatment plant in Wenzhou as an example, this device was used to treat the total phosphorus standard. The pH of the chemical plating phosphorus-containing wastewater was 8.2. The total phosphorus content in the wastewater was detected to be 774 mg / L, mainly hypophosphorous. After being treated by this device, the sludge finally flowed out from the side sludge outlet, and the clean water flowed out from the outlet, thus achieving mud and water separation. The total phosphorus in the final effluent was detected to be stable below 0.3 mg / L, meeting the total phosphorus discharge requirements on site.

[0037] The above-described embodiments are only used to illustrate one implementation method of the utility model, rather than to limit it. It should be pointed out that a person skilled in the art may modify the technical solutions described in the above-described embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the protection scope of the technical solutions of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by a person skilled in the art without making creative efforts are within the protection scope of the utility model.

Claims

1. A new integrated deep phosphorus removal device, characterized in that: It comprises a water collection regulating unit, a dosing reaction unit, a pH regulating unit, a flocculation reaction unit and a high-efficiency precipitation unit which are connected in sequence; the dosing reaction unit is provided with a telescopic perforated branch pipe for a dephosphorizer and a telescopic perforated branch pipe for an oxidant; the high-efficiency precipitation unit is provided with a V-shaped precipitation tank and a perforated grille.

2. A novel integrated deep dephosphorization device according to claim 1, characterized in that: A water inlet is provided on the water collection and regulation unit; a first flow hole is provided between the water collection and regulation unit and the drug adding reaction unit, a second flow hole is provided between the drug adding reaction unit and the pH adjustment unit, a third flow hole is provided between the pH adjustment unit and the flocculation reaction unit, and a fourth flow hole is provided between the flocculation reaction unit and the high-efficiency sedimentation unit; a water outlet is provided above the high-efficiency sedimentation unit, and a mud outlet is provided below the high-efficiency sedimentation unit.

3. A novel integrated deep dephosphorization device according to claim 1, characterized in that: The water collection and regulation unit is provided with a first acid-base dosing box and a first pH automatic control analyzer; the dosing reaction unit is provided with a dephosphorization agent dosing box and an oxidant dosing box; the pH regulation unit is provided with a second acid-base dosing box and a second pH automatic control analyzer; the flocculation reaction unit is provided with a flocculant dosing box.

4. A novel integrated deep dephosphorization device according to claim 1, characterized in that: The lower ends of the dephosphorizer telescopic perforated branch pipe and the oxidant telescopic perforated branch pipe are provided with a plurality of perforated rows, the perforated rows are spaced at 45°, 60° or 90°, and the spacing between the perforated rows is set according to the amount and volume of flocs generated during the dosing reaction.

5. A novel integrated deep dephosphorization device according to claim 1, characterized in that: Aeration plates are respectively provided at the bottom of the water collection and regulation unit and the bottom of the drug addition reaction unit.

6. A novel integrated deep dephosphorization device according to claim 1, characterized in that: The water collection regulating unit, the drug adding reaction unit, the pH regulating unit and the flocculation reaction unit are respectively provided with a stirrer.

7. A novel integrated deep dephosphorization device according to claim 1, characterized in that: A perforated aeration pipe is provided below the perforated grid.

8. A novel integrated deep dephosphorization device according to claim 1, characterized in that: The type of wastewater treated by the device is wastewater containing hypophosphorus and phosphorous.

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