Lead-zinc smelting comprehensive sewage treatment device

Abstract

The utility model relates to the technical field of sewage treatment, in particular to a lead-zinc smelting comprehensive sewage treatment device which comprises a sewage storage tank, a fluorine removal tank, a vulcanization tank, a calcium removal reaction kettle tank, a precipitation tank, a clear liquid tank, an adsorption tank and a clear water tank, the bottom of the fluorine removal tank is fixedly communicated with a vulcanization tank; the bottom of the vulcanization tank is fixedly communicated with a calcium removal reaction kettle tank; the outer side of the lower part of the calcium removal reaction kettle tank is fixedly communicated with a precipitation tank; the outer side of the lower part of the precipitation tank is fixedly communicated with a clear liquid tank; the upper end of the stirrer extends to the outer side of the upper part of the defluorination tank and then is fixedly connected with a stirring motor; by arranging the fluorine removal tank, the vulcanization tank, the calcium removal reaction kettle tank, the adsorption tank and the like, the sewage treatment process of fluorine removal, vulcanization and adsorption is realized, the structure is simple, the operation is convenient, the sewage treatment can be performed in a one-stop manner, and the sewage treatment efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment technical field especially relates to a kind of lead-zinc smelting comprehensive sewage treatment device. BACKGROUND

[0002] Sour acid waste liquid generated in lead-zinc smelting process is collected in sour acid storage tank, then pumped to neutralization reaction tank, after adding lime milk mixing stirring pH adjustment, pumped to first filter press for sludge dewatering, clear liquid flows into sedimentation tank, clarified liquid in sedimentation tank is pumped to first sulfuration reaction tank, sulfuration agent and PAM are sequentially added for reaction, sulfuration agent removes most of thallium, zinc, cadmium, copper and other metal ion pollutants in the form of sulfuration precipitation, reaction liquid flows into first thickener for sedimentation separation, bottom mud is pumped to second filter press for dewatering, supernatant in first thickener flows into two-stage sulfuration tank, after being pumped to oxidation tank, oxidizing agent and PAM are sequentially added, oxidizing agent oxidizes residual monovalent thallium ion into trivalent thallium ion, reaction liquid flows into second thickener for sedimentation separation again, bottom mud is pumped to third filter press, supernatant in second thickener is sent to multiple parallel filters for filtration treatment by multiple parallel lifting pumps, then sequentially passes through multiple parallel I-type activated carbon columns and multiple parallel I-type thallium resin adsorption columns for adsorption treatment, to deeply remove thallium and SS and other pollutants, sour acid waste liquid after adsorption treatment is sent to wastewater conditioning tank; nitrogen-containing and oxygen-containing functional groups on the surface of activated carbon in I-type activated carbon column consume part of oxidizing agent, which protects the thallium removal adsorption column at the rear end, then wastewater enters I-type thallium resin adsorption column for adsorption thallium removal treatment, due to complex process, equipment dispersion, sewage leakage during treatment process, and cumbersome operation, actual production is caused many inconveniences. CONTENT OF THE UTILITY MODEL

[0003] The utility model provides a kind of lead-zinc smelting comprehensive sewage treatment device, overcome the above-mentioned prior art deficiency, it can effectively solve the problem of complex sewage treatment process and cumbersome operation of the existing lead-zinc smelting sewage treatment device structure complexity.

[0004] To solve the above problems, the utility model discloses a kind of lead-zinc smelting comprehensive sewage treatment device, including sewage storage tank, defluorination tank, sulfuration tank, calcium removal reaction kettle tank, sedimentation tank, clear liquid pool, adsorption pool and clean water pool;Sewage storage tank outlet is fixedly connected with defluorination tank, the bottom of defluorination tank is fixedly connected with sulfuration tank, the bottom of sulfuration tank is fixedly connected with calcium removal reaction kettle tank, the lower outer side of calcium removal reaction kettle tank is fixedly connected with sedimentation tank, the lower outer side of sedimentation tank is fixedly connected with clear liquid pool, clear liquid pool bottom is equipped with adsorption pool, and adsorption pool bottom is equipped with clean water pool;

[0005] The defluorination tank is provided with a stirrer, and a stirring motor is fixedly connected to the upper end of the stirrer; the defluorination tank is provided with a calcium chloride storage tank and a PAC storage tank above, and the bottom of each of the calcium chloride storage tank and the PAC storage tank is fixedly communicated with the inner side of the defluorination tank; the sulfuration tank is provided with a sodium sulfide storage tank fixedly communicated with the sulfuration tank; the calcium removal reaction kettle tank is provided with a mixer in the inner side, a mixing motor is fixedly connected to the lower end of the mixer after penetrating through the bottom of the calcium removal reaction kettle tank, and the outer side of the calcium removal reaction kettle tank is fixedly communicated with a sodium carbonate storage tank, and the inner wall of the calcium removal reaction kettle tank is provided with an anti-vortex baffle; the inner side of the sedimentation tank is provided with a thickener on the upper side, a sedimentation plate, a sedimentation tank on the inner side of the sedimentation plate, a spiral sludge discharger on the inner side of the sedimentation tank, a plurality of mud outlets penetrating through the inner and outer sides of the sedimentation tank on the side wall of the sedimentation tank corresponding to one end of the spiral sludge discharger, and a sludge discharging motor connected to the other end of the spiral sludge discharger after penetrating through the corresponding position of the sedimentation tank.

[0006] The bottom of the sedimentation tank is provided with an overflow pipe fixedly communicated with the clear liquid tank, and the sedimentation tank is provided with a liquid outlet pipe fixedly communicated with the clear liquid tank on the upper side of the sedimentation plate.

[0007] The calcium removal reaction kettle tank and the sedimentation tank are fixedly communicated through a first conveying pipeline, and the first conveying pipeline is provided with a first control valve.

[0008] The outer side of the clear liquid tank is fixedly communicated with a second conveying pipeline, and the second conveying pipeline is provided with a second control valve.

[0009] The outer side of the clear liquid tank is fixedly communicated with a second conveying pipeline, and the second conveying pipeline is provided with a second control valve.

[0010] The inner side of the clear liquid tank is fixedly communicated with a second conveying pipeline, and the second conveying pipeline is provided with a second control valve.

[0011] The inner wall of the clear liquid tank is provided with a second conveying pipeline, and the second conveying pipeline is provided with a second control valve.

[0012] The inner wall of the clear liquid tank is provided with a second conveying pipeline, and the second conveying pipeline is provided with a second control valve. The utility model discloses a calcium removal reaction kettle tank, a sedimentation tank, a clear liquid tank, a calcium removal reaction kettle tank, an adsorption tank and the like structure are set up, and the sewage treatment process of " defluorination + sulfuration + adsorption " is realized, namely, after collecting, the sewage enters the defluorination reaction tank, and the calcium fluoride precipitate is added with calcium chloride and PAC to remove fluoride ions, the water flows into the sulfuration reaction tank, and the most metal ion pollutants are removed in the form of sulfuration precipitate by adding sodium sulfide, the water flows into the calcium removal reaction kettle tank, and the calcium ions are removed in the form of calcium carbonate precipitate by adding sodium carbonate, reaches the membrane processing water requirement, the water flows into the thickener, and then the clear liquid enters the clear liquid tank, and after adding the reagent and settling, enters the adsorption tank, and after deeply removing the suspended matter pollutants, reaches the standard and is discharged or reused, the device structure is simple, convenient operation can be carried out in one station sewage treatment, and the treatment process is simple, improves the efficiency of sewage treatment.

[0013] The lead-zinc smelting comprehensive sewage treatment device can effectively solve the problem of excessive heavy metal elements in the effluent of the lead-zinc smelting system, and cannot stably reach the standard, so that the sewage discharge concentration is lower than the standard limit value requirement of the modification single of the lead and zinc industrial pollutant discharge standard, and the environmental risk is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0014] The specific embodiments of the utility model will be further described in combination with the drawings.

[0015] Figure 1 The device structure diagram of the utility model.

[0016] In the figure: 1-sewage storage tank, 2-defluorination tank, 3-sulfuration tank, 4-calcium removal reaction kettle tank, 5-sedimentation tank, 6-clear liquid pool, 7-adsorption pool, 8-clean water pool, 9-agitator, 10-agitation motor, 11-calcium chloride storage tank, 12-PAC storage tank, 13-sodium sulfide storage tank, 14-mixer, 15-mixing motor, 16-sodium carbonate storage tank, 17-anti-vortex baffle, 18-thickener, 19-sedimentation plate, 20-sedimentation tank, 21-spiral sludge discharger, 22-sludge outlet, 23-sludge discharge motor, 24-overflow pipe, 25-liquid outlet pipe, 26-first conveying pipeline, 27-first control valve, 28-second conveying pipeline, 29-second control valve, 30-drainage outlet, 31-third control valve. DETAILED DESCRIPTION

[0017] The utility model is not limited by the following examples, and the specific implementation can be determined according to the technical scheme of the utility model and the actual situation.

[0018] The utility model will be further described in combination with examples and drawings:

[0019] As Figure 1 Shown, a kind of lead-zinc smelting comprehensive sewage treatment device, including sewage storage tank 1, defluorination tank 2, sulfuration tank 3, calcium removal reaction kettle tank 4, sedimentation tank 5, clear liquid pool 6, adsorption pool 7 and clean water pool 8;Sewage storage tank 1 outlet is fixedly connected with defluorination tank 2, and the bottom of defluorination tank 2 is fixedly connected with sulfuration tank 3, and the bottom of sulfuration tank 3 is fixedly connected with calcium removal reaction kettle tank 4, and the lower outer side of calcium removal reaction kettle tank 4 is fixedly connected with sedimentation tank 5, and the lower outer side of sedimentation tank 5 is fixedly connected with clear liquid pool 6, and the bottom of clear liquid pool 6 is equipped with adsorption pool 7, and the bottom of adsorption pool 7 is equipped with clean water pool 8;

[0020] The defluorination tank 2 is provided with a stirrer 9, and the upper end of the stirrer 9 extends to the outside of the upper portion of the defluorination tank 2 and is fixedly connected with a stirring motor 10; the upper portion of the defluorination tank 2 is provided with a calcium chloride storage tank 11 and a PAC storage tank 12, and the bottom portions of the calcium chloride storage tank 11 and the PAC storage tank 12 are fixedly communicated with the inner side of the defluorination tank 2; the outer side of the sulfidation tank 3 is provided with a sodium sulfide storage tank 13 fixedly communicated with the sulfidation tank 3; the inner side of the calcium removal reaction kettle tank 4 is provided with a mixer 14, the lower end of the mixer 14 penetrates through the bottom portion of the calcium removal reaction kettle tank 4 and is fixedly connected with a mixing motor 15, the outer side of the calcium removal reaction kettle tank 4 is fixedly communicated with a sodium carbonate storage tank 16, and the inner wall of the calcium removal reaction kettle tank 4 is provided with an anti-vortex baffle 17; the inner side of the sedimentation tank 5 is provided with a thickener 18, and the inner side of the sedimentation tank 5 is provided with a sedimentation plate 19; the inner side of the sedimentation tank 5 at the position below the sedimentation plate 19 is provided with a sedimentation tank 20, the inner side of the sedimentation tank 20 is provided with a spiral sludge discharger 21, a plurality of mud outlets 22 penetrating in and out are arranged on the side wall of the sedimentation tank 20 at the position corresponding to one end of the spiral sludge discharger 21, and the other end of the spiral sludge discharger 21 is connected with a sludge discharging motor 23 after penetrating through the corresponding position of the sedimentation tank 20.

[0021] The anti-vortex baffle 17 and the mixer 14 are arranged on the inner wall of the calcium removal reaction kettle tank 4, which prevents liquid vortex splashing and high heat generated when the mixer 14 accelerates mixing, because the mixing process requires water flow to produce intense turbulence, and the medicament and water are fully mixed in a relatively short time, and the anti-vortex baffle 17 can effectively prevent liquid stirring from vortexing, so that liquid stirring is more uniform.

[0022] During operation, sewage is collected in the sewage storage tank 1, flows into the defluorination tank 2 from the bottom portion of the sewage storage tank 1, and calcium chloride and PAC are added into the defluorination tank 2 through the calcium chloride storage tank 11 and the PAC storage tank 12, the stirrer 9 is started to stir, and fluoride ions in the liquid are removed in the form of calcium fluoride precipitation, then the liquid flows into the sulfidation tank 3, sodium sulfide is added into the sulfidation tank 3 through the sodium sulfide storage tank 13, most of the metal ion pollutants are removed in the form of sulfidation precipitation, then the liquid enters the calcium removal reaction kettle tank 4, sodium carbonate is added into the calcium removal reaction kettle tank 4 through the sodium carbonate storage tank 16, calcium ions are removed in the form of calcium carbonate precipitation, and the requirements of membrane treatment of influent are met; the treated liquid is subjected to solid-liquid separation through the thickener 18, the separated clear liquid is discharged into the clear liquid tank 6, the generated sludge is discharged into the sludge tank through the spiral sludge discharger 21, the clear liquid in the clear liquid tank 6 is added with medicament for sedimentation and then enters the adsorption tank 7, the suspended matter pollutants are deeply removed, and then the liquid enters the clear water tank 8, and is discharged or recycled after reaching the standard.

[0023] In conclusion, the utility model discloses a structure that is provided with defluorination tank 2, sulfuration tank 3, calcium removal reaction kettle tank 4 and adsorption tank 7, realizing the sewage treatment process of "defluorination + sulfuration + adsorption", that is, after collecting, the sewage enters the defluorination reaction tank, and calcium chloride and PAC are added to remove fluoride ions in the form of calcium fluoride precipitation; the effluent flows into the sulfuration reaction tank, and sodium sulfide is added to remove most of the metal ion pollutants in the form of sulfuration precipitation; the effluent flows into the calcium removal reaction tank, and sodium carbonate is added to remove calcium ions in the form of calcium carbonate precipitation, meeting the requirements of membrane treatment, and the effluent flows into the thickener 18, and then the clear liquid enters the clear liquid tank 6, and after adding reagents and settling, enters the adsorption tank, and after removing suspended pollutants, meets the discharge standard or is reused, so that the utility model has the advantages of simple structure, convenient operation, one-stop sewage treatment, simple treatment process and improved sewage treatment efficiency.

[0024] In addition, the utility model can effectively solve the problem of excessive heavy metal elements in the lead-zinc smelting system effluent, and cannot meet the standard, so that the sewage discharge concentration is lower than the standard limit value required by the modification of the lead and zinc industrial pollutant discharge standard, and the environmental risk is reduced.

[0025] As shown in Figure 1 The bottom of the sedimentation tank 20 is provided with an overflow pipe 24 fixedly communicated with the clear liquid tank 6, and the sedimentation tank 5 above the sedimentation plate 19 is provided with a liquid outlet pipe 25 fixedly communicated with the clear liquid tank 6. Thus, the liquid in the sedimentation tank 20 and the sedimentation tank 5 is discharged into the clear liquid tank 6.

[0026] As shown in Figure 1 It also includes a first conveying pipeline 26, and the calcium removal reaction kettle tank 4 and the sedimentation tank 5 are fixedly communicated through the first conveying pipeline 26, and the first conveying pipeline 26 is provided with a first control valve 27. Thus, the amount of liquid entering the sedimentation tank 5 can be controlled.

[0027] As shown in Figure 1 The outside of the clear liquid tank 6 is fixedly communicated with a second conveying pipeline 28, and the second conveying pipeline 28 is provided with a second control valve 29. Thus, the reagent can be conveyed into the clear liquid tank 6 through the second conveying pipeline 28 to settle the liquid in the clear liquid tank 6.

[0028] As shown in Figure 1 The bottom of the clear water tank 8 is fixedly communicated with a drain 30 outside, and the drain 30 is provided with a third control valve 31 outside. Thus, the clear water tank 8 can conveniently drain water.

[0029] As shown in Figure 1 The adsorption tank 7 is provided with quartz sand and activated carbon, and the ratio of the quartz sand and the activated carbon is 1:2. Thus, the filter device combined with the quartz sand and the activated carbon is provided to improve the filtering efficiency.

[0030] As shown in Figure 1As shown, sewage storage tank 1, fluoride removal tank 2, sulfuration tank 3 and calcium removal reaction kettle tank 4 cavity wall are provided with wear-resistant anticorrosive paint, thickness is 3-5mm. Thus, increase the service life of sewage storage tank 1, fluoride removal tank 2, sulfuration tank 3 and calcium removal reaction kettle tank 4 equipment.

Claims

1. A lead-zinc smelting comprehensive wastewater treatment device, characterized in that, The sewage storage tank, the defluorination tank, the sulfuration tank, the calcium removal reaction kettle tank, the sedimentation tank, the clear liquid pool, the adsorption pool and the clean water pool; the sewage storage tank outlet is fixedly connected with the defluorination tank, the bottom of the defluorination tank is fixedly connected with the sulfuration tank, the bottom of the sulfuration tank is fixedly connected with the calcium removal reaction kettle tank, the lower part of the calcium removal reaction kettle tank is fixedly connected with the sedimentation tank, the lower part of the sedimentation tank is fixedly connected with the clear liquid pool, the bottom of the clear liquid pool is provided with the adsorption pool, and the bottom of the adsorption pool is provided with the clean water pool. The defluorination tank is provided with a stirrer, the upper end of the stirrer extends to the outer side of the upper part of the defluorination tank and is fixedly connected with a stirring motor; the upper part of the defluorination tank is provided with a calcium chloride storage tank and a PAC storage tank, the bottoms of the calcium chloride storage tank and the PAC storage tank are fixedly connected with the inner side of the defluorination tank; the outer side of the sulfuration tank is provided with a sodium sulfide storage tank fixedly connected with the sulfuration tank; the inner side of the calcium removal reaction kettle tank is provided with a mixer, the lower end of the mixer penetrates through the bottom of the calcium removal reaction kettle tank and is fixedly connected with a mixing motor, the outer side of the calcium removal reaction kettle tank is fixedly connected with a sodium carbonate storage tank, and the inner wall of the calcium removal reaction kettle tank is provided with an anti-vortex baffle; the inner side of the sedimentation tank is provided with a thickener, the inner side of the sedimentation tank is provided with a sedimentation plate, the inner side of the sedimentation tank at the position below the sedimentation plate is provided with a sedimentation pool, the inner side of the sedimentation pool is provided with a spiral sludge discharger, the side wall of the sedimentation pool at the position corresponding to one end of the spiral sludge discharger is provided with a plurality of mud outlets penetrating in and out, and the other end of the spiral sludge discharger penetrates through the corresponding position of the sedimentation pool and is connected with a sludge discharging motor.

2. The lead and zinc smelting comprehensive wastewater treatment device according to claim 1, characterized in that, The bottom of the sedimentation pool is provided with an overflow pipe fixedly connected with the clear liquid pool, and the sedimentation tank at the position above the sedimentation plate is provided with a liquid outlet pipe fixedly connected with the clear liquid pool.

3. The lead and zinc smelting comprehensive wastewater treatment device according to claim 1, characterized in that, The calcium removal reaction kettle tank and the sedimentation tank are fixedly connected through a first conveying pipeline, and a first control valve is installed on the first conveying pipeline.

4. The lead and zinc smelting comprehensive wastewater treatment device according to claim 1, characterized in that, The outer side of the clear liquid pool is fixedly connected with a second conveying pipeline, and a second control valve is installed on the second conveying pipeline.

5. The lead and zinc smelting comprehensive wastewater treatment device according to claim 1, characterized in that, The outer side of the bottom of the clean water pool is fixedly connected with a water outlet, and a third control valve is installed on the outer side of the water outlet.

6. The lead and zinc smelting comprehensive wastewater treatment device according to claim 1, characterized in that, The adsorption pool is provided with quartz sand and activated carbon, and the ratio of the quartz sand and the activated carbon is 1:

2.

7. The lead and zinc smelting comprehensive wastewater treatment device according to claim 1, characterized in that, The inner walls of the cavities of the sewage storage tank, the defluorination tank, the sulfuration tank and the calcium removal reaction kettle tank are provided with wear-resistant anticorrosive paint, and the thickness is 3-5 mm.

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