A device for photocatalytically assisting the treatment of acidic mine wastewater

Abstract

The present invention discloses a device for photocatalytically assisting in treating acidic mine wastewater, belonging to the technical field of wastewater treatment. The present invention mainly includes: an organic salting-out system, a photocatalytic Fe 3+ reduction system, an FeSO4 extraction and separation system, a lime acid removal system, a heavy metal colloid precipitation system, a lime milk secondary neutralization system, and a CO2 neutralization system. The acidic mine wastewater channel is connected to the organic salting-out system through a pipeline, and the organic salting-out system is connected to the acidic mine wastewater and photocatalytic Fe 3+ reduction system through a pipeline, and the photocatalytic Fe 3+ reduction system is connected to the FeSO4 extraction and separation system through a pipeline. The FeSO4 extraction and separation system is respectively connected to the lime acid removal system, the heavy metal colloid precipitation system, and the CO2 neutralization system through pipelines. The lime acid removal system is connected to the heavy metal colloid precipitation system and the lime milk secondary neutralization system through pipelines. The heavy metal colloid precipitation system is connected to the lime milk secondary neutralization system through a pipeline, and the lime milk secondary neutralization system is connected to the CO2 neutralization system through a pipeline. At the same time, the device provides a Fresnel high-magnification concentrating photoelectric conversion system electrically connected to the entire device to provide electrical energy. The device for photocatalytically assisting in treating acidic mine wastewater of the present invention can achieve the effects of treating acidic metal ion-containing wastewater at low cost and recycling by-products, and is discharged into the municipal wastewater pipeline after reaching the discharge standard.

Description

Technical Field

[0001] The present invention relates to the field of environmental protection, in particular to the field of wastewater treatment technology, and specifically to a device for photocatalytically assisting the treatment of acidic mine wastewater. Background Art

[0002] Acidic wastewater generated during mining has always been one of the important factors restricting the development of the mining industry and causing severe environmental conditions. Mining is often accompanied by a large amount of Fe 2+ , Fe 3+ Metal ions such as SO 4 2- The pH of such wastewater is usually lower than 3 and the content of heavy metal ions is high, which will cause great damage to the ecological environment.

[0003] The prior art usually uses lime and Fe 3+ Formation of Fe(OH) 3 Precipitation, followed by addition of microorganisms to reduce SO 2- Cheng HS - , followed by Fe 2 S 3 The metal sulfide precipitates are precipitated to remove metal ions and acid radical ions. On the one hand, this method is expensive to use microorganisms, requires a lot of maintenance effort, and has high risks. On the other hand, the Fe(OH) 3 and Fe 2 S 3 Subsequent processing is required, which increases the consumption of manpower and material resources. 3+ with SO 2- Both neutralization and precipitation rely on the reaction with lime, resulting in a high amount of lime used.

[0004] Therefore, it is necessary to provide a device and a technical solution to solve the above problems. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a device for purifying acid mine wastewater to make it reach the discharge standard, thereby solving the problem of high environmental pollution of acid mine wastewater and high restriction on the mining industry.

[0006] The technical solution adopted by the present invention to solve the technical problem is: a device for photocatalytically assisting the treatment of acidic mine wastewater, mainly comprising: an organic salting-out system, a photocatalytic Fe 3+ Reduction system, FeSO 4 Extraction and separation system, lime acid removal system, heavy metal colloid precipitation system, lime milk secondary neutralization system and CO 2Neutralization system; the organic salting out system connects the acid mine wastewater with the photocatalytic Fe 3+ Reduction system, photocatalytic Fe 3+ The reduction system is connected to the FeSO 4 Extraction and separation system, FeSO 4 The extraction and separation system is connected to the lime acid removal system, the heavy metal colloid precipitation system and the CO 2 The neutralization system and the lime acid removal system are connected to the heavy metal colloid precipitation system and the lime milk secondary neutralization system through pipelines, the heavy metal colloid precipitation system is connected to the lime milk secondary neutralization system through pipelines, and the lime milk secondary neutralization system is connected to the CO 2 Neutralization system, at the same time, the device provides a Fresnel high-power focusing photoelectric conversion system to electrically connect the entire device to provide it with electrical energy.

[0007] Furthermore, the organic salting-out system comprises: a transmission pipeline, an electric water pump, a salting-out chamber, a salting-out agent chamber, and a filter screen; the transmission pipeline is equipped with an electric water pump connected to the salting-out chamber, the salting-out agent chamber is connected to the salting-out chamber, and the filter screen is installed at the bottom of the salting-out chamber and connected to the photocatalytic Fe 3+ Photocatalytic reduction chamber of the reduction system.

[0008] Furthermore, the photocatalytic Fe 3+ The reduction system includes: a photocatalytic reduction chamber, a convex lens concentrator, an ultraviolet filter, and an ultraviolet matrix lamp; the input end of the photocatalytic reduction chamber is connected to the salt precipitation chamber through a transmission pipeline, and the output end is connected to the electric water pump through a transmission pipeline. 4 Extraction and separation system of FeSO 4 Condensation chamber, the ultraviolet filter is located below the convex lens concentrator and on the top of the photocatalytic reduction chamber. The ultraviolet filter is composed of a graphite material nanofluid layer and a semiconductor material nanofluid layer. The graphite material nanofluid layer is located above the semiconductor material nanofluid layer. Ultraviolet matrix lamps are installed around the top of the photocatalytic reduction chamber.

[0009] Furthermore, FeSO 4 Extraction and separation system includes: FeSO 4 Condensation chamber, water circulation cooling device, FeSO 4 Separation chamber, circular slide and FeSO 4 Collection chamber; FeSO 4 The input end of the condensation chamber is connected to the photocatalytic reduction chamber through a transmission pipeline, and the output end is connected to the FeSO 4 Separation chamber, water circulation cooling device passes through the cooling water coil through the FeSO 4 Condensation chamber, FeSO 4 The separation chamber is connected to the limestone deacidification chamber of the lime deacidification system through a transmission pipeline and an electric water pump.4 The separation chamber is located above the circular slide rail. 4 There are pulleys on both sides of the separation chamber, FeSO 4 The collecting chamber is located below the circular slide rail and is connected to the heavy metal precipitation chamber of the heavy metal colloid precipitation system through a transmission pipeline.

[0010] Furthermore, FeSO 4 The condensation chamber and water circulation cooling device include: acid wastewater layer, high-pressure nozzle, temperature sensor, pressure switch blade, cooling water tank and cooling water coil; the input end of the acid wastewater layer is connected to the photocatalytic reduction chamber through a transmission pipeline, and the output end has a high-pressure nozzle. There is a cooling water coil inside the system, the temperature sensor is located on the inner wall, and the pressure switch blade is located at the FeSO 4 The bottom of the condensation chamber is connected to the FeSO 4 Condensation chamber with FeSO 4 Separation chamber, both ends of the cooling water coil are connected to the cooling water tank through transmission pipelines and electric water pumps. The cooling water coil is located in the FeSO 4 The interior of the condensation chamber.

[0011] Furthermore, the lime deacidification system includes: a limestone deacidification chamber, a lime milk deacidification chamber and a lime milk chamber; the input end of the limestone deacidification chamber is connected to the FeSO 4 Separation chamber, limestone deacidification chamber is isolated from lime milk deacidification chamber by time switch blade Ⅰ, and the top of limestone deacidification chamber is connected with CO 2 The collecting chamber is connected, one end of the lime milk acid removal chamber is connected to the lime milk chamber, and the other end is connected to the heavy metal precipitation chamber of the heavy metal colloid precipitation system.

[0012] Furthermore, the limestone acid removal chamber comprises: an acid neutralization chamber I, a porous limestone layer and a timing switch blade I; the acid neutralization chamber I is connected to the acid neutralization chamber II through the timing switch blade I, the porous limestone layer is located at the bottom of the acid neutralization chamber I, and the top of the acid neutralization chamber I is connected to the CO 2 Collection room.

[0013] Furthermore, the lime milk acid removal chamber includes: an acid neutralization chamber II, an acid-base sensor I, a filter, an electric stirring paddle I, a timing switch blade II and an alkaline waste liquid chamber; the acid neutralization chamber II is connected to the alkaline waste liquid chamber through the filter and the timing switch blade II, the electric stirring paddle I is located at the bottom of the acid neutralization chamber II, and the acid-base sensor I is located at the bottom of the inner wall of the acid neutralization chamber II.

[0014] Furthermore, the heavy metal colloid precipitation system includes: a heavy metal precipitation chamber, a temperature controller, an acid-base sensor II, an electric stirring paddle II, a filter screen and a gravity switch blade; the input end of the heavy metal precipitation chamber is connected to FeSO 4The collecting chamber is connected to the lime milk acid removal chamber of the lime acid removal system, and the output end is connected to the lime milk neutralization and impurity removal chamber of the lime milk secondary neutralization system. The temperature controller and the acid-base sensor II are located on the inner wall of the heavy metal precipitation chamber. The electric stirring paddle II, the filter screen and the gravity switch blade are located at the bottom of the heavy metal precipitation chamber. The electric stirring paddle II is located above the filter screen, and the filter screen is located above the gravity switch blade.

[0015] Furthermore, the lime milk secondary neutralization system comprises: a lime milk neutralization and impurity removal chamber and a filter screen; the input end of the lime milk neutralization and impurity removal chamber is connected to the lime milk chamber and the heavy metal precipitation chamber of the heavy metal colloid precipitation system through a transmission pipeline, and the output end is connected to the CO 2 CO neutralization system 2 Neutralization chamber, the filter screen is located at the bottom of the lime milk neutralization and impurity removal chamber.

[0016] Furthermore, CO 2 Neutralization system includes: CO 2 Neutralization chamber, acid-base sensor III and CO 2 Collection chamber; CO 2 The input end of the neutralization chamber is connected to the lime milk neutralization and impurity removal chamber of the lime milk secondary neutralization system through a transmission pipeline, and the output end is connected to the municipal drainage system. 2 The input end of the collection chamber is connected to the limestone deacidification chamber of the lime deacidification system through a transmission pipeline, and the output end is connected to the CO 2 Neutralization chamber, acid-base sensor III is located in CO 2 Neutralize the inner wall of the cavity.

[0017] When the present invention starts to work, the acid mine wastewater generated in the mining area is sucked into the salting-out chamber by the electric water pump through the transmission pipeline. When the salting-out chamber is full of liquid, the electric water pump of the organic salting-out system stops working, and the excess sodium sulfate in the salting-out agent chamber enters the salting-out chamber to react with the organic matter in the acid mine wastewater to generate precipitation material. The solid organic matter is precipitated and filtered through the filter screen. The treated acid mine wastewater is passed to the photocatalytic reduction chamber through the transmission pipeline by the electric water pump. At this time, the electric water pump of the organic salting-out system is turned on, and the organic salting-out system continues to work.

[0018] When the amount of acidic mine wastewater entering the photocatalytic reduction chamber reaches a certain level, the photocatalytic Fe 3+ The electric water pump of the reduction system stops working, and the photocatalytic Fe 3+ When there is sunlight, the reduction system collects the sunlight through the concave lens concentrator and irradiates it to the ultraviolet filter. After passing through the graphite material nanofluid layer and the semiconductor material nanofluid layer, it filters and absorbs other colors of light, leaving only ultraviolet light. The filtered ultraviolet light irradiates the photocatalytic reduction room, and the photocatalyst TiO 2 Under the action of 3+ Reduction to Fe 2+, photocatalytic Fe 3+ When there is no sunlight, the UV matrix lamp on the top of the photocatalytic reduction chamber starts to work to provide ultraviolet light for the photocatalytic reduction chamber. The ultraviolet light irradiates into the photocatalytic reduction chamber and 2 Under the action of 3+ Reduction to Fe 2+ , at this time, the photocatalytic Fe 3+ The electric water pump of the reduction system starts to work and the treated acid mine wastewater is pumped to the FeSO 4 Condensation chamber, followed by photocatalytic Fe 3+ The restore system continues to work.

[0019] FeSO 4 The acid mine wastewater in the acid wastewater layer of the condensation chamber is sprayed onto the cooling water coil by a high-pressure nozzle to cool the acid mine wastewater. After cooling, FeSO is precipitated. 4 Solid, when FeSO 4 When the solid reaches a certain weight, the pressure switch blade opens, allowing acid mine drainage to pass into the FeSO 4 In the separation chamber, FeSO 4 The rounded table funnel in the separation chamber will transfer FeSO 4 The solids are retained in the solid storage chamber, and the remaining liquid is pumped into the limestone deacidification chamber through a transmission pipeline by an electric water pump.

[0020] At this time, the FeSO retained in the solid storage cavity 4 Solid FeSO 4 The electric pulley outside the separation chamber slides to the FeSO 4 Just above the collection chamber, place FeSO 4 FeSO in the separation chamber 4 Solid, poured into FeSO 4 The collection chamber is then used in a heavy metal colloid precipitation system to form colloids that adsorb heavy metals to suspend particulate matter.

[0021] FeSO 4 There is a water circulation cooling device in the condensing chamber. The cooling water in the cooling water tank is pumped to the cooling water coil through the transmission pipeline to cool the acid mine wastewater in the acid wastewater layer. 4 The condensation chamber is equipped with a temperature sensor, which can detect the temperature of FeSO 4 The condensation chamber is controlled at about 5°C. At this time, FeSO 4 The amount of precipitation reaches the maximum.

[0022] The acid mine wastewater entering the limestone deacidification chamber reacts with the CaCO in the porous limestone layer in the acid neutralization chamber I.3 The reaction produces CO 2 , the generated CO 2 The gas-liquid mixing pump enters the CO 2 In the collection room, after the acid mine wastewater in the limestone acid removal chamber reacts for a period of time, the timer switch blade Ⅰ opens to allow the acid mine wastewater to flow into the acid neutralization chamber Ⅱ of the lime milk acid removal chamber. At this time, the electric water pump of the lime acid removal system stops working, and the lime milk in the lime milk chamber enters the acid neutralization chamber Ⅱ to react with the acid to reduce the pH of the solution. The electric stirring paddle Ⅰ in the acid neutralization chamber Ⅱ stirs the solution as the lime milk enters, so that the solution reacts fully. When the acid-base sensor Ⅰ detects that the pH value of the solution is about 9, the timer switch blade Ⅱ opens, and the solution flows into the alkaline waste liquid chamber. The suspended particles in the solution are filtered by the filter, and the alkaline mine wastewater in the alkaline waste liquid chamber is passed to the heavy metal precipitation chamber by the electric water pump through the transmission pipeline, and then the lime acid removal system continues to work.

[0023] When the alkaline waste liquid in the heavy metal precipitation chamber reaches a certain amount, the electric water pump of the heavy metal colloid precipitation system stops working, and FeSO 4 Collecting FeSO in the room 4 It enters the heavy metal precipitation chamber through the transmission pipeline to form colloid, adsorbing heavy metals and suspended particles in the alkaline waste liquid. 4 When entering the heavy metal precipitation chamber, the electric stirring paddle II starts working to accelerate the formation of colloid. At the same time, the acid-base sensor II controls the pH value of the solution to about 9, and the temperature controller controls the temperature to about 5°C. When there are more solid substances at the bottom of the heavy metal precipitation chamber, the pressure switch blade II opens, and the colloid remains on the filter screen. The alkaline liquid passes through the transmission pipeline and the electric water pump to the lime milk and impurity removal chamber, and then the heavy metal colloid precipitation system continues to work.

[0024] When the liquid in the lime milk neutralization and impurity removal chamber reaches a certain amount, the electric water pump of the lime milk secondary neutralization system stops working, and the lime milk in the lime milk chamber enters the lime milk neutralization and impurity removal chamber to remove the heavy metals that have not been completely removed in the heavy metal colloid precipitation system. After a period of reaction, the solution passes through the filter screen, the transmission pipeline, and the electric water pump to the CO 2 In the neutralization chamber, the lime milk secondary neutralization system then continues to work.

[0025] CO 2 When the liquid in the neutralization chamber reaches a certain amount, CO 2 The electric water pump of the neutralization system stopped working, CO 2 CO in the collection chamber 2 The gas-liquid mixing pump introduces CO through the transmission pipeline. 2In the neutralization chamber, the alkaline wastewater is neutralized to weak alkalinity or weak acidity. When the acid-base sensor III detects that the pH of the wastewater is weak alkalinity or weak acidity, CO 2 The electric water pump of the neutralization system starts working, discharging the treated acid mine drainage into the municipal wastewater pipeline, and then CO 2 The neutralization system continues to work.

[0026] The beneficial effects of the present invention are: the ultraviolet light is filtered out of sunlight by nanofluid for photocatalysis, which is green and environmentally friendly; the precipitated FeSO 4 It is used for colloidal precipitation and adsorption in subsequent wastewater, reducing the treatment cost; the CO generated by the reaction of limestone and acid 2 Collected to CO 2 The collection chamber is used to circulate and neutralize alkaline water, which not only treats the CO generated during the treatment process 2 , while reducing greenhouse gas emissions and the cost of treating alkaline wastewater in subsequent steps; the device is equipped with a Fresnel high-power concentrating photovoltaic conversion system, which concentrates sunlight onto solar photovoltaic panels to generate electricity, and stores the electrical energy for powering the entire device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] Figure 1 This is the structural diagram of the device for photocatalytically assisted treatment of acidic mine wastewater.

[0029] Figure 2 It is a device structure diagram of the organic salting-out system 1.

[0030] Figure 3 For photocatalytic Fe 3+ Device structure diagram of reduction system 2.

[0031] Figure 4 FeSO 4 Device structure diagram of extraction and separation system 3.

[0032] Figure 5 FeSO 4 Device structure diagram of condensation chamber 31 and water circulation cooling device 32.

[0033] Figure 6 It is the device structure of the lime acid removal system 4.

[0034] Figure 7 It is a structural diagram of the device of the limestone acid removal chamber 41.

[0035] Figure 8 It is a structural diagram of the lime milk deacidification chamber 42.

[0036] Fig. 9 It is a device structure diagram of the heavy metal colloid precipitation system 5.

[0037] Fig.10 It is the device structure diagram of the lime milk secondary neutralization system 6.

[0038] Fig.11 For CO 2 Device structure diagram of neutralization system 7.

[0039] 11. Transmission pipeline; 12. Electric water pump; 13. Salting chamber; 14. Salting agent chamber; 15. Filter; 21. Photocatalytic reduction chamber; 22. Convex lens concentrator; 23. Ultraviolet filter; 24. Ultraviolet matrix lamp; 31. FeSO 4 Condensation chamber; 32. Water circulation cooling device; 33. FeSO 4 Separation chamber; 34, circular slide rail; 35, FeSO 4 Collection chamber; 41, limestone deacidification chamber; 42, lime milk deacidification chamber; 43, lime milk chamber; 51, heavy metal precipitation chamber; 52, temperature controller; 53, acid-base sensor II; 54, electric stirring paddle II; 55, filter screen; 56, gravity switch blade; 61, lime milk neutralization and impurity removal chamber; 62, filter screen; 71, CO 2 Neutralization chamber; 72. Acid-base sensor III; 73. CO 2 Collection room.

[0040] 311. Acidic wastewater layer; 312. High-pressure nozzle; 313. Temperature sensor; 314. Pressure switch blade; 321. Cooling water tank; 322. Cooling water coil; 411. Acid neutralization chamber I; 412. Porous limestone layer; 413. Timing switch blade I; 421. Acid neutralization chamber II; 422. Acid-base sensor I; 423. Filter; 424. Electric stirring paddle I; 425. Timing switch blade II; 426. Alkaline waste liquid chamber. DETAILED DESCRIPTION

[0041] The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the present invention in a schematic manner, and therefore only shows the components related to the present invention.

[0042] like Figure 1 As shown, the present invention designs a device for photocatalytically assisting the treatment of acidic mine wastewater, which mainly includes: an organic salting-out system 1, a photocatalytic Fe 3+ Reduction system 2, FeSO 4 Extraction and separation system 3, lime acid removal system 4, heavy metal colloid precipitation system 5, lime milk secondary neutralization system 6 and CO 2 Neutralization system 7; organic salting-out system 1 connects acidic mine wastewater and photocatalytic Fe through a pipeline3+ Reduction system 2, photocatalytic Fe 3+ Reduction system 2 is connected to FeSO by pipeline 4 Extraction and separation system 3, FeSO 4 The extraction and separation system 3 is connected to the lime acid removal system 4, the heavy metal colloid precipitation system 5 and the CO 2 The neutralization system 7 and the lime acid removal system 4 are connected to the heavy metal colloid precipitation system 5 and the lime milk secondary neutralization system 6 through pipelines, respectively. The heavy metal colloid precipitation system 5 is connected to the lime milk secondary neutralization system 6 through pipelines, and the lime milk secondary neutralization system 6 is connected to the CO 2 Neutralization system 7, at the same time, the device provides a Fresnel high-power focusing photoelectric conversion system to electrically connect the entire device to provide electrical energy.

[0043] like Figure 2 As shown, the organic salting-out system 1 comprises: a transmission pipeline 11, an electric water pump 12, a salting-out chamber 13, a salting-out agent chamber 14, and a filter 15; the transmission pipeline 11 is equipped with an electric water pump 12 connected to the salting-out chamber 13, the salting-out agent chamber 14 is connected to the salting-out chamber 13, and the filter 15 is installed at the bottom of the salting-out chamber 13 through the transmission pipeline 11 to connect to the photocatalytic Fe 3+ The photocatalytic reduction chamber 21 of the reduction system 2 .

[0044] like Figure 3 As shown, the photocatalytic Fe 3+ The reduction system 2 includes: a photocatalytic reduction chamber 21, a convex lens concentrator 22, an ultraviolet filter 23, and an ultraviolet matrix lamp 24; the input end of the photocatalytic reduction chamber 21 is connected to the salting chamber 13, and the output end is connected to the FeSO 4 Extraction and separation system 3 for FeSO 4 Condensation chamber 31, the ultraviolet filter 23 is located below the convex lens concentrator 22 and at the top of the photocatalytic reduction chamber 21, the ultraviolet filter is composed of a graphite material nanofluid layer and a semiconductor material nanofluid layer, the graphite material nanofluid layer is located above the semiconductor material nanofluid layer, and ultraviolet matrix lamps are installed around the top of the photocatalytic reduction chamber.

[0045] like Figure 4 As shown, FeSO 4 Extraction and separation system 3 includes: FeSO 4 Condensation chamber 31, water circulation cooling device 32, FeSO 4 Separation chamber 33, circular slide rail 34 and FeSO 4 Collection chamber 35: FeSO 4 The input end of the condensation chamber 31 is connected to the photocatalytic reduction chamber 21, and the output end is connected to the FeSO 4 Separation chamber 33, water circulation cooling device 32 passes through the FeSO4 Condensation chamber 31, FeSO 4 The separation chamber 33 is connected to the limestone acid removal chamber 41 of the lime acid removal system 4, FeSO 4 The separation chamber 33 is located above the circular slide rail 34. 4 Pulleys are provided on both sides of the separation chamber 33, FeSO 4 The collecting chamber 35 is located below the circular slide rail 34 and is connected to the heavy metal precipitation chamber 51 of the heavy metal colloid precipitation system 5 .

[0046] like Figure 5 As shown, FeSO 4 The condensation chamber 31 and the water circulation cooling device 32 include: an acidic wastewater layer 311, a high-pressure nozzle 312, a temperature sensor 313, a pressure switch blade 314, a cooling water tank 321 and a cooling water coil 322; the input end of the acidic wastewater layer 311 is connected to the photocatalytic reduction chamber 21, the output end has a high-pressure nozzle 312, the system has a cooling water coil 322, the temperature sensor 313 is located on the inner wall of the system, and the pressure switch blade 314 is located at the FeSO 4 The bottom of the condensation chamber 31 is connected to the FeSO 4 Condensation chamber 31 and FeSO 4 Separation chamber 33, cooling water coil 322 is connected to cooling water tank 321 at both ends, cooling water coil 322 is located at FeSO 4 The interior of the condensation chamber 31.

[0047] like Figure 6 As shown, the lime deacidification system 4 includes: a limestone deacidification chamber 41, a lime milk deacidification chamber 42 and a lime milk chamber 43; the input end of the limestone deacidification chamber 41 is connected to the FeSO 4 Separation chamber 33, limestone deacidification chamber 41 is isolated from lime milk deacidification chamber 42 by time switch blade I 413, and the top of limestone deacidification chamber 41 is connected to CO 2 The collecting chamber 73 is connected, one end of the lime milk acid removal chamber 42 is connected to the lime milk chamber 43 , and the other end is connected to the heavy metal precipitation chamber 51 of the heavy metal colloid precipitation system 5 .

[0048] like Figure 7 As shown, the limestone acid removal chamber 41 includes: an acid neutralization chamber Ⅰ 411, a porous limestone layer 412 and a timing switch blade Ⅰ 413; the acid neutralization chamber Ⅰ 421 is connected to the acid neutralization chamber Ⅱ 411 through the timing switch blade Ⅰ 413, the porous limestone layer 412 is located at the bottom of the acid neutralization chamber Ⅰ 411, and the top of the acid neutralization chamber Ⅰ 411 is connected to the CO 2 Collection chamber 73.

[0049] like Figure 8As shown, the lime milk acid removal chamber 42 includes: an acid neutralization chamber II 421, an acid-base sensor I 422, a filter screen 423, an electric stirring paddle I 424, a timing switch blade II 425 and an alkaline waste liquid chamber 426; the acid neutralization chamber II 421 is connected to the alkaline waste liquid chamber 426 through the filter screen 423 and the timing switch blade II 425, the electric stirring paddle I 424 is located at the bottom of the acid neutralization chamber II 421, and the acid-base sensor I 422 is located at the bottom of the inner wall of the acid neutralization chamber II 421.

[0050] like Fig. 9 As shown, the heavy metal colloid precipitation system includes: a heavy metal precipitation chamber 51, a temperature controller 52, an acid-base sensor II 53, an electric stirring paddle II 54, a filter 55 and a gravity switch blade 56; the input end of the heavy metal precipitation chamber 51 is connected to FeSO 4 The collecting chamber 35 and the lime milk acid removal chamber 42 of the lime acid removal system 4 are connected to the lime milk neutralization and impurity removal chamber 61 of the lime milk secondary neutralization system 6 at the output end. The temperature controller 52 and the acid-base sensor II 53 are located on the inner wall of the heavy metal precipitation chamber 51. The electric stirring paddle II 54, the filter screen 55 and the gravity switch blade 56 are located at the bottom of the heavy metal precipitation chamber 51. The electric stirring paddle II 54 is located above the filter screen 55, and the filter screen 55 is located above the gravity switch blade 56.

[0051] like Fig.10 As shown, the lime milk secondary neutralization system 6 comprises: a lime milk neutralization and impurity removal chamber 61 and a filter 62; the input end of the lime milk neutralization and impurity removal chamber 61 is respectively connected to the lime milk chamber 43 and the heavy metal precipitation chamber 51 of the heavy metal colloid precipitation system 5, and the output end is connected to the CO 2 Neutralization system 7 CO 2 The neutralization chamber 71 and the filter screen 62 are located at the bottom of the lime milk neutralization and impurity removal chamber 61 .

[0052] like Fig.11 As shown, CO 2 Neutralization system 7 includes: CO 2 Neutralization chamber 71, acid-base sensor III 72 and CO 2 Collection chamber 73; CO 2 The input end of the neutralization chamber 71 is connected to the lime milk neutralization and impurity removal chamber 61 of the lime milk secondary neutralization system 6, and the output end is connected to the municipal drainage system. 2 The input end of the collecting chamber 73 is connected to the limestone acid removal chamber 41 of the lime acid removal system 4, and the output end is connected to the CO 2 Neutralization chamber 71, acid-base sensor III 72 is located in CO 2 The inner wall of the neutralization chamber 71.

[0053] When sodium sulfate is used in industry, a small amount of sodium sulfate is generally used as a desiccant to remove moisture; when the amount of sodium sulfate is excessive, most of the organic solvents that are difficult to handle in a mixed state will cause stratification and hydrolysis, producing a small amount of sulfuric acid and salting out some solids, which is convenient for subsequent treatment and discharge.

[0054] Photocatalysis can decompose almost all organic substances and some inorganic substances that are harmful to the human body and the environment. It can not only accelerate the reaction, but also avoid waste of resources and additional pollution. 2 Nanofluids can be used for solar thermal utilization. Sunlight is collected by a concave lens concentrator and irradiated onto an ultraviolet filter. After passing through the nanofluid layer of graphite and semiconductor materials, it absorbs other colors of light and filters out ultraviolet light at a low cost.

[0055] Under acidic conditions, FeSO 4 The solubility is lowest at 5°C, and the temperature can be controlled at around 5°C to precipitate it, achieving the effect of removing most of the metal ions in the wastewater; under alkaline conditions, when pH is around 9 and the temperature is around 5°C, FeSO 4 It is almost insoluble in water and can be used to form colloids to adsorb heavy metals and suspended particles in alkaline waste liquids. Stirring can accelerate the formation of colloids and improve the efficiency of adsorption.

[0056] When the device of the present invention starts to work, the acid mine wastewater generated in the mining area is sucked into the salting-out chamber 13. When the salting-out chamber 13 is filled with liquid, the electric water pump 12 of the organic salting-out system 1 stops working, and the excess sodium sulfate in the salting-out agent chamber 14 enters the salting-out chamber 13 to react with the organic matter in the acid mine wastewater to produce precipitate. The solid organic matter is precipitated and filtered through the filter 15. The treated acid mine wastewater is passed to the photocatalytic reduction chamber 21. At this time, the electric water pump 12 of the organic salting-out system 1 is turned on, and the organic salting-out system 1 continues to work.

[0057] When the amount of acidic mine wastewater entering the photocatalytic reduction chamber 21 reaches a certain amount, the photocatalytic Fe 3+ Reduction system 2 stops working, photocatalytic Fe 3+ When there is sunlight in the reduction system 2, the sunlight is focused by the concave lens condenser 22 and irradiated to the ultraviolet filter 23, and then filtered and absorbed by the graphite material nanofluid layer and the semiconductor material nanofluid layer, and other colors of light are left. The filtered ultraviolet light is irradiated into the photocatalytic reduction chamber 21, and the photocatalyst TiO 2 Under the action of 3+ Reduction to Fe 2+ , photocatalytic Fe 3+When there is no sunlight in the reduction system 2, the ultraviolet matrix lamp 24 on the top of the photocatalytic reduction chamber 21 starts to work to provide ultraviolet light for the photocatalytic reduction chamber 21. The ultraviolet light irradiates into the photocatalytic reduction chamber 21, and the photocatalyst TiO 2 Under the action of 3+ Reduction to Fe 2+ , at this time, the photocatalytic Fe 3+ Reduction system 2 starts working and the treated acid mine drainage is passed to FeSO 4 In the condensation chamber 31, the photocatalytic Fe 3+ Restore System 2 continues to work.

[0058] FeSO 4 The acid mine wastewater in the acid wastewater layer 311 of the condensation chamber 31 is sprayed onto the cooling water coil 322 by the high pressure nozzle 312 to cool the acid mine wastewater. After cooling, FeSO 4 Solid, when FeSO 4 When the solids reach a certain weight, the pressure switch blade 314 opens, allowing the acid mine drainage water to pass into the FeSO 4 In the separation chamber 33, FeSO 4 The rounded table funnel 333 in the separation chamber 33 separates FeSO 4 The solids are retained in the solid storage chamber 331 , and the remaining liquid is passed to the limestone deacidification chamber 41 .

[0059] At this time, the FeSO retained in the solid storage chamber 331 4 Solid FeSO 4 The electric pulley 332 outside the separation chamber 33 slides to the FeSO 4 Just above the collection chamber 35, the FeSO 4 FeSO in separation chamber 33 4 Solid, poured into FeSO 4 The collection chamber 35 is then used by the heavy metal colloid precipitation system 5 to form colloids to adsorb heavy metals to suspend particulate matter.

[0060] FeSO 4 The condensation chamber 31 is provided with a water circulation cooling device 32. The cooling water in the cooling water tank 321 is passed to the cooling water coil 322 to cool the acid mine wastewater in the acid wastewater layer 311. FeSO 4 A temperature sensor 313 is provided in the condensation chamber 31. The temperature sensor 313 can detect the temperature so that FeSO 4 The condensation chamber 31 is controlled at about 5°C, at which time FeSO 4 The amount of precipitation reaches the maximum.

[0061] The acidic mine wastewater entering the limestone deacidification chamber 41 reacts with the CaCO in the porous limestone layer 412 in the acid neutralization chamber I 411. 3 The reaction produces CO 2 , the generated CO 2 Enter CO 2 In the collecting chamber 73, after the acid mine wastewater in the limestone acid removal chamber 41 reacts for a period of time, the timing switch blade I413 opens to allow the acid mine wastewater to flow into the acid neutralization chamber II421 of the lime milk acid removal chamber 42. At this time, the lime acid removal system 4 stops working, and the lime milk in the lime milk chamber 43 enters the acid neutralization chamber II421 to react with the acid to reduce the pH of the solution. The electric stirring paddle I424 in the acid neutralization chamber II421 stirs the solution as the lime milk enters, so that the solution reacts fully. When the acid-base sensor I422 in the acid neutralization chamber II421 detects that the pH value of the solution is about 9, the timing switch blade II425 opens, and the solution flows into the alkaline waste liquid chamber 426. The suspended particles in the solution are filtered by the filter 423, and the alkaline mine wastewater in the alkaline waste liquid chamber 426 passes to the heavy metal precipitation chamber 51, and then the lime acid removal system 4 continues to work.

[0062] When the alkaline waste liquid in the heavy metal precipitation chamber 51 reaches a certain amount, the heavy metal colloid precipitation system 5 stops working, and FeSO 4 FeSO in the collection chamber 35 4 Enter the heavy metal precipitation chamber 51 to form colloids, adsorb heavy metals and suspended particles in the alkaline waste liquid. 4 When entering the heavy metal precipitation chamber 51, the electric stirring paddle II 54 starts to work, accelerating the formation speed of the colloid. At the same time, the acid-base sensor II 53 controls the pH value of the solution at about 9, and the temperature controller 52 controls the temperature at about 5°C. When there are more solid substances at the bottom of the heavy metal precipitation chamber 51, the pressure switch blade II 56 opens, and the colloid remains on the filter screen 55. The alkaline liquid passes into the lime milk and impurity removal chamber 61, and then the heavy metal colloid precipitation system 5 continues to work.

[0063] When the liquid in the lime milk neutralization and impurity removal chamber 61 reaches a certain amount, the lime milk secondary neutralization system 6 stops working, and the lime milk in the lime milk chamber 43 enters the lime milk neutralization and impurity removal chamber 61 to remove the heavy metals that have not been completely removed in the heavy metal colloid precipitation system 5. After a period of reaction, the solution passes through the filter 62 to the CO 2 In the neutralization chamber 71, the lime milk secondary neutralization system 6 then continues to work.

[0064] CO 2 When the liquid in the neutralization chamber 71 reaches a certain amount, the operation stops, and CO 2 CO in the collection chamber 73 2 The gas-liquid mixing pump 14 introduces CO2 In the neutralization chamber 7, the alkaline wastewater is neutralized to weak alkalinity or weak acidity. When the acid-base sensor III 72 detects that the pH is qualified, CO 2 The neutralization system 7 resumes operation and discharges the treated wastewater into the municipal wastewater pipeline.

[0065] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the scope of the present invention through the above description. The technical scope of this invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A device for photocatalytically assisting the treatment of acidic mine wastewater, comprising an organic salting-out system (1), a photocatalytic Fe 3+ The reduction system (2), the FeSO4 extraction and separation system (3), the lime acid removal system (4), the heavy metal colloid precipitation system (5), the lime milk secondary neutralization system (6) and the CO2 neutralization system (7) are characterized by: Organic salting out system (1) connects acid mine wastewater with photocatalytic Fe 3+ Reduction system (2), photocatalytic Fe 3+ The reduction system (2) is connected to the FeSO4 extraction and separation system (3) through a pipeline, the heavy metal colloid precipitation system (5) is connected to the lime milk secondary neutralization system (6) through a pipeline, and the lime milk secondary neutralization system (6) is connected to the CO2 neutralization system (7) through a pipeline. At the same time, the device provides a Fresnel high-power concentrated photoelectric conversion system to electrically connect the entire device to provide electrical energy, wherein the photocatalytic Fe 3+ The reduction system (2) comprises: a photocatalytic reduction chamber (21), a convex lens concentrator (22), an ultraviolet filter (23), and an ultraviolet matrix lamp (24). The input end of the photocatalytic reduction chamber (21) is connected to a salting-out chamber (13), and the output end is connected to a FeSO4 condensation chamber (31) of a FeSO4 extraction and separation system (3). The ultraviolet filter (23) is located below the convex lens concentrator (22) and at the top of the photocatalytic reduction chamber (21). The ultraviolet filter (23) is composed of a graphite material nanofluid layer and a semiconductor material nanofluid layer. The graphite material nanofluid layer is located above the semiconductor material nanofluid layer. The top of the photocatalytic reduction chamber (21) Ultraviolet matrix lamps (24) are installed around the FeSO4 extraction and separation system (3); the FeSO4 extraction and separation system (3) comprises: a FeSO4 condensation chamber (31), a water circulation cooling device (32), a FeSO4 separation chamber (33), a circular slide rail (34) and a FeSO4 collection chamber (35); the input end of the FeSO4 condensation chamber (31) is connected to the photocatalytic reduction chamber (21), and the output end is connected to the FeSO4 separation chamber (33); the water circulation cooling device (32) runs through the FeSO4 condensation chamber (31) through a cooling water coil (322); the FeSO4 separation chamber (33) is connected to the limestone deacidification chamber (41) of the lime deacidification system (4); the FeSO4 separation chamber (33) is located The FeSO4 separation chamber (33) is provided with pulleys on both sides above the circular slide rail (34), and the FeSO4 collection chamber (35) is located below the circular slide rail (34) and is connected to the heavy metal precipitation chamber (51) of the heavy metal colloid precipitation system (5); the lime deacidification system (4) comprises: a limestone deacidification chamber (41), a lime milk deacidification chamber (42) and a lime milk chamber (43), the input end of the limestone deacidification chamber (41) is connected to the FeSO4 separation chamber (33), the limestone deacidification chamber (41) is isolated from the lime milk deacidification chamber (42) by a timing switch blade I (413), the top of the limestone deacidification chamber (41) is connected to the CO2 collection chamber (73), and the lime milk deacidification chamber (42) is connected to the CO2 collection chamber (73). One end of the acid chamber (42) is connected to the lime milk chamber (43), and the other end is connected to the heavy metal precipitation chamber (51) of the heavy metal colloid precipitation system (5); the CO2 neutralization system (7) comprises: a CO2 neutralization chamber (71), an acid-base sensor III (72) and a CO2 collection chamber (73); the input end of the CO2 neutralization chamber (71) is connected to the lime milk neutralization and impurity removal chamber (61) of the lime milk secondary neutralization system (6), and the output end is connected to the municipal drainage system; the input end of the CO2 collection chamber (73) is connected to the limestone acid removal chamber (41) of the lime acid removal system (4), and the output end is connected to the CO2 neutralization chamber (71); the acid-base sensor III (72) is located on the inner wall of the CO2 neutralization chamber (71).

2. The device for photocatalytically assisting the treatment of acid mine wastewater according to claim 1, characterized in that: The organic salting-out system (1) comprises: a transmission pipeline (11), an electric water pump (12), a salting-out chamber (13), a salting-out agent chamber (14), and a first filter screen (15); the transmission pipeline (11) is equipped with an electric water pump (12) and connected to the salting-out chamber (13); the salting-out agent chamber (14) is connected to the salting-out chamber (13); the bottom of the salting-out chamber (13) is equipped with a first filter screen (15) and connected to the photocatalytic Fe 3+ A photocatalytic reduction chamber (21) of the reduction system (2).

3. The device for photocatalytically assisting the treatment of acid mine wastewater according to claim 1, characterized in that: The FeSO4 condensation chamber (31) and the water circulation cooling device (32) comprise: an acidic wastewater layer (311), a high-pressure nozzle (312), a temperature sensor (313), a pressure switch blade (314), a cooling water tank (321) and a cooling water coil (322); the input end of the acidic wastewater layer (311) is connected to the photocatalytic reduction chamber (21), the output end is provided with a high-pressure nozzle (312), a cooling water coil (322) is provided inside the system, the temperature sensor (313) is located on the inner wall, the pressure switch blade (314) is located at the bottom of the FeSO4 condensation chamber (31), and the FeSO4 condensation chamber (31) and the FeSO4 separation chamber (33) are connected; both ends of the cooling water coil (322) are connected to the cooling water tank (321), and the cooling water coil (322) is located inside the FeSO4 condensation chamber (31).

4. The device for photocatalytically assisting the treatment of acid mine wastewater according to claim 1, characterized in that: The limestone deacidification chamber (41) comprises: an acid neutralization chamber I (411), a porous limestone layer (412) and a time switch blade I (413); the lime milk deacidification chamber (42) comprises: an acid neutralization chamber II (421), an acid-base sensor I (422), a fourth filter screen (423), an electric stirring blade I (424), a time switch blade II (425) and an alkaline waste liquid chamber (426); the acid neutralization chamber I (411) is connected to the acid neutralization chamber II through the time switch blade I (413). (421), a porous limestone layer (412) is located at the bottom of the acid neutralization chamber I (411), the top of the acid neutralization chamber I (411) is connected to the CO2 collection chamber (73), the acid neutralization chamber II (421) is connected to the alkaline waste liquid chamber (426) through the fourth filter screen (423), the electric stirring paddle I (424) is located at the bottom of the acid neutralization chamber II (421), and the acid-base sensor I (422) is located at the bottom of the inner wall of the acid neutralization chamber II (421).

5. The device for photocatalytically assisting the treatment of acid mine wastewater according to claim 1, characterized in that: The heavy metal colloid precipitation system (5) comprises: a heavy metal precipitation chamber (51), a temperature controller (52), an acid-base sensor II (53), an electric stirring paddle II (54), a second filter screen (55) and a gravity switch blade (56); the input end of the heavy metal precipitation chamber (51) is connected to a FeSO4 collection chamber (35) and a lime milk acid removal chamber (42) of a lime acid removal system (4); the output end is connected to a lime milk neutralization and impurity removal chamber (61) of a lime milk secondary neutralization system (6); the temperature controller (52) and the acid-base sensor II (53) are located on the inner wall of the heavy metal precipitation chamber (51); the electric stirring paddle II (54), the second filter screen (55) and the gravity switch blade (56) are located at the bottom of the heavy metal precipitation chamber (51); the electric stirring paddle II (54) is located above the second filter screen (55); and the second filter screen (55) is located above the gravity switch blade (56).

6. The device for photocatalytically assisting the treatment of acid mine wastewater according to claim 1, characterized in that: The lime milk secondary neutralization system (6) comprises: a lime milk neutralization and impurity removal chamber (61) and a third filter screen (62); the input end of the lime milk neutralization and impurity removal chamber (61) is respectively connected to the lime milk chamber (43) and the heavy metal precipitation chamber (51) of the heavy metal colloid precipitation system (5); the output end is connected to the CO2 neutralization chamber (71) of the CO2 neutralization system (7); and the third filter screen (62) is located at the bottom of the lime milk neutralization and impurity removal chamber (61).

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