CN111013254A - Arsenic-containing waste liquid filtering system - Google Patents
Arsenic-containing waste liquid filtering system Download PDFInfo
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- CN111013254A CN111013254A CN201911365435.5A CN201911365435A CN111013254A CN 111013254 A CN111013254 A CN 111013254A CN 201911365435 A CN201911365435 A CN 201911365435A CN 111013254 A CN111013254 A CN 111013254A
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- arsenic
- waste liquid
- conical filter
- water pump
- tank
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
- B01D36/04—Combinations of filters with settling tanks
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/103—Arsenic compounds
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Materials (AREA)
Abstract
The invention discloses an arsenic-containing waste liquid filtering system which comprises a flocculation sedimentation tank and a filtering tank, wherein a high-pressure water pump is arranged at the outlet of the flocculation sedimentation tank, the water outlet end of the high-pressure water pump is connected with a rotary spray nozzle through a pipeline, a conical filter is fixed on the side wall of the filtering tank, the rotary spray nozzle is fixed at the wide opening of the conical filter, and a concentrated liquid pipe is connected to the top of the conical filter. The arsenic-containing waste liquid after flocculation precipitation is precipitated and then is discharged through a grid laid at the bottom of the tank, the waste liquid containing a large amount of precipitates is sprayed into the conical filter through the rotary spray head after being pressurized by the high-pressure water pump, the precipitates in the waste liquid are intercepted by the composite fiber cloth layer, and the precipitates intercepted on the surface are flushed to the top end of the conical filter and enter the concentrated liquid pipe due to a certain included angle formed between the spraying water column and the inner wall of the conical filter, and redundant water enters the filtering tank, so that the arsenic-containing waste liquid is filtered and concentrated.
Description
Technical Field
The invention relates to wastewater treatment, in particular to an arsenic-containing waste liquid filtering system.
Background
The hard-to-process gold concentrate containing arsenic and carbon adopts two-stage roasting acid making, acid leaching impurity removing and cyaniding gold extracting processes, mixed flue gas of arsenic trioxide, sulfur dioxide and the like is generated in the roasting process, acid-containing arsenic waste liquid is produced through electric precipitation, wet quenching arsenic removal and acid washing purification, and the purified sulfur dioxide flue gas is subjected to secondary conversion and secondary absorption to produce a sulfuric acid product. The method for treating the acidic arsenic-containing waste liquid mainly comprises a lime neutralization method, a lime and iron salt neutralization method, a high-efficiency vulcanization purification method, a microbial oxidation degradation method and the like, wherein the main principle of the lime precipitation method is as follows: adding lime with the arsenic molar quantity of 4-10 times into the wastewater, and adjusting the pH of the wastewater to be more than 12 to ensure that the As in the wastewater3+、As5+Insoluble calcium arsenate, calcium arsenite and other precipitates are formed with the added calcium, so that the arsenic content in the water is effectively reduced, and finally, the pH value of the wastewater is adjusted by adding acid and other methods, so that the wastewater meets the requirements of discharge or subsequent treatment; the main principle of the sulfide precipitation method is as follows: under acidic condition, using As of different valence statesm+Can be reacted with S2-Formation of insoluble precipitated As2Sm(ii) a The main principle of the calcium-iron salt combined arsenic removal method is as follows: pre-oxidizing waste water, adding iron salt, regulating pH value, adding calcium precipitantAnd forming calcium-arsenic slag. The arsenic-containing solid waste obtained by a sulfide precipitation method and a calcium-iron salt combined arsenic removal method is easy to dissolve out, and hidden danger exists in open-air stockpiling. The waste slag produced by the traditional iron salt precipitation method can be stably stored, but has the defects of low precipitation speed, large viscosity of the waste slag and the like. Therefore, how to reduce the amount of the arsenic-containing iron slag and improve the removal rate of arsenic is the key to the problem of treating the arsenic-containing wastewater. In any treatment method, the production and treatment costs are high, and the process flow is complicated.
Patent CN106517577A is a treatment process of acidic arsenic-containing wastewater, in which chlorate or/and perchlorate is used as oxidant to oxidize trivalent arsenic into pentavalent arsenic, and inorganic flocculant and organic flocculant are added successively to perform flocculation precipitation dearsenification. The method adopts the oxidant, adopts multi-stage oxidation treatment and flocculation, still increases the complexity of the process, causes high production cost, adopts an outward discharge mode to treat the treated wastewater, and does not realize the aims of emission reduction and cyclic utilization
Chinese patent CN107188292A discloses a method for purifying arsenic-containing waste liquid by using cyanide silver extraction waste residue, and provides a method for purifying arsenic-containing waste liquid by using cyanide silver extraction waste residue, and the method is low in efficiency due to the fact that operation steps are responsible for and more auxiliaries are used.
Disclosure of Invention
The invention provides an arsenic-containing waste liquid filtering system aiming at the problem of poor treatment effect of the existing arsenic-containing waste liquid.
The technical scheme for solving the technical problems is as follows: a filtering system for arsenic-containing waste liquid comprises a flocculation sedimentation tank and a filtering tank, wherein a grid is laid at the bottom of the flocculation sedimentation tank and is formed by communicating hollow steel pipes, round holes are uniformly distributed in the steel pipes, a certain vertex angle of the grid is communicated with an outlet of the flocculation sedimentation tank, a high-pressure water pump is arranged at the outlet of the flocculation sedimentation tank, and the water outlet end of the high-pressure water pump is connected with a rotary spray nozzle through a pipeline; the filter tank lateral wall is fixed with the toper filter, the toper filter outside-in is metal otter board shell, dense hole composite fiber cloth layer and dredges hole composite fiber cloth layer in proper order, rotatory nozzle is fixed toper filter wide mouth department, rotatory nozzle's water spray range does the filterable inner wall of toper, the toper filter top is connected with the concentrate pipe.
The invention has the beneficial effects that: the arsenic-containing waste liquid after flocculation precipitation is precipitated and then is discharged through a grid laid at the bottom of the tank, the waste liquid containing a large amount of precipitates is sprayed into the conical filter through the rotary spray head after being pressurized by the high-pressure water pump, the precipitates in the waste liquid are intercepted by the composite fiber cloth layer, and the precipitates intercepted on the surface are flushed to the top end of the conical filter and enter the concentrated liquid pipe due to a certain included angle formed between the spraying water column and the inner wall of the conical filter, and redundant water enters the filtering tank, so that the arsenic-containing waste liquid is filtered and concentrated.
Further, the horizontal inclination angle of the wide mouth of the conical filter is 0-30 degrees. The included angle of water jet column and inner wall can be controlled by adjusting the inclined angle of the conical filter, so that the intercepted sediment is quickly flushed into the concentrated liquid pipe.
Furthermore, 1-4 filtering ponds are connected in series, a high-pressure water pump is arranged in a concentrated liquid pipe of the first filtering pond, the water outlet end of the high-pressure water pump is connected with a rotary spray head through a pipeline, the rotary spray head is fixed at the wide opening of the conical filter of the second filtering pond, and the subsequent structures are the same. And a multistage filter tank is arranged, so that the concentrated solution can be filtered and concentrated for multiple times.
Drawings
FIG. 1 is a schematic structural view of example 1; FIG. 2 is a top view of a flocculation sedimentation tank; FIG. 3 is a schematic view of a conical filter; FIG. 4 is a schematic structural view of embodiment 2; each part is as follows:
1. the device comprises a flocculation sedimentation tank, 2 parts of grids, 3 parts of a high-pressure water pump, 4 parts of a rotary spray head, 5 parts of a filter tank, 6 parts of a conical filter, 6-1 parts of a metal mesh plate shell, 6-2 parts of a dense-hole composite fiber cloth layer, 6-3 parts of a sparse-hole composite fiber cloth layer, 7 parts of a concentrated liquid pipe.
Detailed Description
The present invention is described below with reference to examples, which are provided for illustration only and are not intended to limit the scope of the present invention.
Example 1
A filtration system for arsenic-containing waste liquid comprises a flocculation sedimentation tank 1 and a filtration tank 5, wherein a grid 2 is laid at the bottom of the flocculation sedimentation tank 1, the grid 2 is formed by hollow steel pipes which are communicated, round holes are uniformly distributed on the steel pipes, a certain vertex angle of the grid 2 is communicated with an outlet of the flocculation sedimentation tank 1, a high-pressure water pump 3 is arranged at the outlet of the flocculation sedimentation tank 1, the water outlet end of the high-pressure water pump 3 is connected with a rotary spray head 4 through a pipeline, a conical filter 6 is fixed on the side wall of the filtration tank 5, the conical filter 6 is a metal mesh plate shell 6-1 from outside to inside, dense hole composite fiber cloth layer 6-2 and sparse hole composite fiber cloth layer 6-3, 6 wide-mouth horizontal inclination of conical filter is 30, and rotatory nozzle 4 is fixed in 6 wide-mouth departments of conical filter, and rotatory nozzle 4's water spray range is the filterable inner wall of toper, and 6 tops of conical filter are connected with concentrate pipe 7.
Example 2
A filtration system for arsenic-containing waste liquid comprises a flocculation sedimentation tank 1 and a filtration tank 5, wherein a grid 2 is laid at the bottom of the flocculation sedimentation tank 1, the grid 2 is formed by hollow steel pipes which are communicated, round holes are uniformly distributed on the steel pipes, a certain vertex angle of the grid 2 is communicated with an outlet of the flocculation sedimentation tank 1, a high-pressure water pump 3 is arranged at the outlet of the flocculation sedimentation tank 1, the water outlet end of the high-pressure water pump 3 is connected with a rotary spray head 4 through a pipeline, a conical filter 6 is fixed on the side wall of the filtration tank 5, the conical filter 6 comprises a metal mesh plate shell 6-1, a dense hole composite fiber cloth layer 6-2 and a sparse hole composite fiber cloth layer 6-3 in sequence from outside to inside, the conical filter 6 is horizontally arranged with a wide opening, the rotary spray head 4 is fixed at the wide opening of the conical filter 6, the water spray range of the rotary spray head 4 is, the concentrated liquid pipe 7 of the first filtering tank 5 is provided with a high-pressure water pump 3, the water outlet end of the high-pressure water pump 3 is connected with a rotary nozzle 4 through a pipeline, and the rotary nozzle 4 is fixed at the wide opening of the conical filter 6 of the second filtering tank 5.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (3)
1. A filtration system for arsenic-containing waste liquid comprises a flocculation sedimentation tank and a filtration tank, and is characterized in that,
a grid is laid at the bottom of the flocculation sedimentation tank and is formed by communicating hollow steel pipes, round holes are uniformly distributed on the steel pipes, a certain vertex angle of the grid is communicated with an outlet of the flocculation sedimentation tank, a high-pressure water pump is arranged at the outlet of the flocculation sedimentation tank, and the water outlet end of the high-pressure water pump is connected with a rotary spray head through a pipeline;
the filter tank lateral wall is fixed with the toper filter, the toper filter outside-in is metal otter board shell, dense hole composite fiber cloth layer and dredges hole composite fiber cloth layer in proper order, rotatory nozzle is fixed toper filter wide mouth department, rotatory nozzle's water spray range does the filterable inner wall of toper, the toper filter top is connected with the concentrate pipe.
2. The arsenic-containing waste liquid filtering system according to claim 1, wherein the horizontal inclination angle of the wide mouth of the conical filter is 0 ° to 30 °.
3. The arsenic-containing waste liquid filtering system according to claim 1, wherein 1 to 4 filtering ponds are connected in series, the concentrated liquid pipe of the first filtering pond is provided with a high-pressure water pump, the water outlet end of the high-pressure water pump is connected with a rotary nozzle through a pipeline, the rotary nozzle is fixed at the wide opening of the conical filter of the second filtering pond, and the subsequent structures are the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911365435.5A CN111013254A (en) | 2019-12-26 | 2019-12-26 | Arsenic-containing waste liquid filtering system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911365435.5A CN111013254A (en) | 2019-12-26 | 2019-12-26 | Arsenic-containing waste liquid filtering system |
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| Publication Number | Publication Date |
|---|---|
| CN111013254A true CN111013254A (en) | 2020-04-17 |
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| CN201911365435.5A Pending CN111013254A (en) | 2019-12-26 | 2019-12-26 | Arsenic-containing waste liquid filtering system |
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Citations (12)
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|---|---|---|---|---|
| CN202366543U (en) * | 2011-11-04 | 2012-08-08 | 海门市大生水处理设备（厂）有限公司 | Improved full-automatic pipeline filter |
| CN202921064U (en) * | 2012-09-26 | 2013-05-08 | 吴旭东 | Sewage filter |
| CN203379679U (en) * | 2013-08-07 | 2014-01-08 | 长春黄金研究院 | High-efficiency pipeline filter |
| CN203507671U (en) * | 2013-10-14 | 2014-04-02 | 济宁市连翔石化有限公司 | Waste lubrication oil recycling device |
| CN203591649U (en) * | 2013-12-02 | 2014-05-14 | 青海晶和新材料研究所 | Automatic filtering device for oil plants |
| CN205412354U (en) * | 2015-12-15 | 2016-08-03 | 安徽晋煤中能化工股份有限公司 | Subsider underflow pump import filter equipment |
| CN106211839A (en) * | 2016-07-15 | 2016-12-14 | 佟保根 | A kind of water discharge method of alkaline land soil |
| CN205803183U (en) * | 2016-06-29 | 2016-12-14 | 重庆开达环保工程有限公司 | Efficiently trade effluent pretreatment system |
| CN206033490U (en) * | 2016-08-23 | 2017-03-22 | 浙江远大纸业有限公司 | Papermaking wastewater biochemical treatment is filter equipment in advance |
| CN106927601A (en) * | 2017-04-26 | 2017-07-07 | 陈钦旺 | A kind of environmentally friendly papermaking wastewater recycling and processing device |
| CN207159744U (en) * | 2017-08-09 | 2018-03-30 | 江苏建筑职业技术学院 | A kind of pavement drainage arrangement |
| CN209052488U (en) * | 2018-09-14 | 2019-07-02 | 赵瑞 | A kind of waste liquid transport process device for environmental protection equipment |
-
2019
- 2019-12-26 CN CN201911365435.5A patent/CN111013254A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202366543U (en) * | 2011-11-04 | 2012-08-08 | 海门市大生水处理设备（厂）有限公司 | Improved full-automatic pipeline filter |
| CN202921064U (en) * | 2012-09-26 | 2013-05-08 | 吴旭东 | Sewage filter |
| CN203379679U (en) * | 2013-08-07 | 2014-01-08 | 长春黄金研究院 | High-efficiency pipeline filter |
| CN203507671U (en) * | 2013-10-14 | 2014-04-02 | 济宁市连翔石化有限公司 | Waste lubrication oil recycling device |
| CN203591649U (en) * | 2013-12-02 | 2014-05-14 | 青海晶和新材料研究所 | Automatic filtering device for oil plants |
| CN205412354U (en) * | 2015-12-15 | 2016-08-03 | 安徽晋煤中能化工股份有限公司 | Subsider underflow pump import filter equipment |
| CN205803183U (en) * | 2016-06-29 | 2016-12-14 | 重庆开达环保工程有限公司 | Efficiently trade effluent pretreatment system |
| CN106211839A (en) * | 2016-07-15 | 2016-12-14 | 佟保根 | A kind of water discharge method of alkaline land soil |
| CN206033490U (en) * | 2016-08-23 | 2017-03-22 | 浙江远大纸业有限公司 | Papermaking wastewater biochemical treatment is filter equipment in advance |
| CN106927601A (en) * | 2017-04-26 | 2017-07-07 | 陈钦旺 | A kind of environmentally friendly papermaking wastewater recycling and processing device |
| CN207159744U (en) * | 2017-08-09 | 2018-03-30 | 江苏建筑职业技术学院 | A kind of pavement drainage arrangement |
| CN209052488U (en) * | 2018-09-14 | 2019-07-02 | 赵瑞 | A kind of waste liquid transport process device for environmental protection equipment |
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Application publication date: 20200417 |
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