CN212770220U

CN212770220U - Treatment system for removing sulfate from mine water

Info

Publication number: CN212770220U
Application number: CN202021374613.9U
Authority: CN
Inventors: 袁宏宾; 肖灿; 马卓煌
Original assignee: Hunan Neite Environmental Protection Technology Co ltd
Current assignee: Hunan Neite Environmental Protection Technology Co ltd
Priority date: 2020-07-14
Filing date: 2020-07-14
Publication date: 2021-03-23
Anticipated expiration: 2030-07-14

Abstract

The utility model provides a processing system for desorption mine water sulfate, including effluent disposal system and medicament recovery system, effluent disposal system includes preprocessing device and reaction unit, and preprocessing device includes aeration regulation pond and V type filtering pond, and reaction unit is including the activation adsorption reaction pond that links up in proper order, pH equalizing basin, flocculation basin, sedimentation tank and filter cloth filtering pond, and the activation adsorption reaction pond still links up V type filtering pond, places the nanometer medicament that is used for adsorbing sulfate ion in the waste water in the activation adsorption reaction pond. The utility model adsorbs sulfate ions through the nano-medicament without adding other pollutants; the reaction efficiency of the nano medicament and sulfate ions is high, the treatment is thorough, and the concentration of the sulfate ions in the effluent is reduced to below 10 mg/L; the nano medicament can be recycled, and residues generated in the sulfate removal process can be recycled after treatment, so that the energy is saved and the environment is protected; the system has high efficiency, good treatment effect and simple operation.

Description

Treatment system for removing sulfate from mine water

Technical Field

The utility model relates to a mine waste water treatment technical field specifically is a processing system for desorption mine water sulphate.

Background

Mine wastewater is mainly formed in the mineral forming and mining processes, is complex and changeable, and simultaneously contains heavy metals such as iron and manganese, nonmetal such as sulfur, fluorine and chlorine, organic pollutants and suspended matters in the same mine wastewater. Some mine waste water is weakly acidic, and even if the same mine is adopted, the layers are different, the properties of the waste water are different, even the difference is very large, which brings great difficulty for the selection of the coal mine waste water treatment technology.

The prior feasible treatment method of mine wastewater comprises the following steps: drug addition, membrane treatment, electro-adsorption, biological methods, and the like. The common chemical addition methods include barium chloride method, barium carbonate method, ultra-high lime-aluminum method, etc. Three common dosing methods have great limitation, and the barium chloride method can introduce chloride ions, so that the chloride ions exceed the standard, and new pollutants are added. The temperature of mine water is generally 10-20 ℃, the reaction speed of a barium carbonate method is too slow, and effluent can not reach three standards of surface water. The ultra-high lime aluminum method has large addition amount of medicament and large generation amount of waste residue, and new anions such as chloride ions are introduced when the pH is adjusted back. The membrane treatment method has high treatment efficiency, but the corresponding investment is high, the process flow is very complex, the membrane needs to be replaced periodically, the operation cost is very high, and in addition, the treatment of the concentrated water part has larger technical risk. Compared with a membrane treatment method, the electro-adsorption method has the defects of high investment and operation cost and complex process flow, and has the advantages of large generation amount of concentrated water and higher energy consumption for concentration and crystallization. The biological method needs to add carbon source, nitrogen source and other inorganic matters, and sulfur ions generated in the biochemical process need to be removed, so that the overall technical risk is overlarge.

SUMMERY OF THE UTILITY MODEL

In view of the above problems in the prior art, the present invention is to provide a treatment system for removing sulfate from mine water, which adsorbs sulfate ions by nano-agents without adding other pollutants; the reaction efficiency of the nano medicament and sulfate ions is high, the treatment is thorough, and the concentration of the sulfate ions in the effluent is reduced to below 10 mg/L; the nano medicament can be recycled, and residues generated in the sulfate removal process can be recycled after treatment, so that the energy is saved and the environment is protected; the system has high efficiency, good treatment effect and simple operation.

In order to realize the purpose, the utility model discloses the technical scheme who adopts is:

the utility model provides a processing system for desorption mine water sulfate, a serial communication port, including effluent disposal system and medicament recovery system, effluent disposal system includes preprocessing device and reaction unit, preprocessing device includes the aeration regulation pond that carries out the aeration to waste water and carries out filterable V type filtering pond to waste water, reaction unit is including the activation adsorption reaction pond that links up in proper order, the pH equalizing basin, the flocculation basin, sedimentation tank and filter cloth filtering pond, the activation adsorption reaction pond still links up V type filtering pond, the nano-medicament that is used for adsorbing sulfate ion in the waste water has been placed in the activation adsorption reaction pond, medicament recovery system includes the recovery pond and the breaker that links up in proper order, the rotary kiln, the leacher, the activation tower, the digester, rotary drum filter and rotary drier, the breaker still links up the sedimentation tank, the recovery pond links up the digester.

As a further improvement of the above technical solution:

the aeration regulation pool comprises a regulation pool body, at least one set of micropore aerator system and at least one Roots blower.

A filter material layer is arranged in the filter tank body, and filter materials of the filter material layer comprise quartz sand and anthracite.

The activation adsorption reaction tank comprises a reaction tank body, an activation gas aeration device and a reaction tank stirring device, wherein the activation gas aeration device and the reaction tank stirring device are both connected with the reaction tank body, the reaction tank body is also connected with a V-shaped filter tank, and a nano medicament for adsorbing sulfate ions in wastewater is placed in the reaction tank body.

A plurality of parallel baffles are arranged in the reaction tank body, and liquid flows among the baffles to form an S-shaped liquid flow path.

Volume 6000m of reaction tank body³The reaction tank stirring device comprises a submersible stirrer, and the stirring intensity is 4w/m³。

The pH adjusting tank comprises an adjusting tank body, an adjusting tank stirring device and a lime dosing system, and the adjusting tank body is connected with the reaction tank body.

The flocculation tank comprises a flocculation tank body, a flocculation tank stirring device and a flocculation tank dosing device.

The sedimentation tank comprises two sedimentation tank bodies, two sludge scrapers for scraping sludge from the sedimentation tank bodies, two sludge pumps for pumping sludge, two sludge filter presses and two sludge pumps of 60m³The sludge concentration tank and two sets of regulating weir gates for controlling the liquid level of the sedimentation tank body.

The system also comprises an activated gas supply device, and the activation tower and the activation adsorption reaction tank are both connected with the activated gas supply device.

Compared with the prior art, the beneficial effects of the utility model are that: sulfate ions are adsorbed by the nano medicament, and other pollutants are not increased; the reaction efficiency of the nano medicament and sulfate ions is high, the treatment is thorough, and the concentration of the sulfate ions in the effluent is reduced to below 10 mg/L; the nano medicament can be recycled, and residues generated in the sulfate removal process can be recycled after treatment, so that the energy is saved and the environment is protected; the system has high efficiency, good treatment effect and simple operation.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a schematic diagram of a tank body structure of an activated adsorption reaction tank according to an embodiment of the present invention;

fig. 3 is a schematic view of a drug recovery system according to an embodiment of the present invention.

Detailed Description

The treatment system for removing sulfate from mine water provided by the invention is further described in detail and completely by combining the embodiment. The following examples are illustrative only and are not to be construed as limiting the invention.

A treatment system for removing sulfate from mine water is shown in figure 1 and comprises a wastewater treatment system and a medicament recovery system.

The wastewater treatment system comprises a pretreatment device and a reaction device.

The pretreatment device comprises an aeration regulation pool 1 and a V-shaped filter pool 2. The aeration regulation and storage tank 1 comprises a regulation and storage tank body, two sets of micropore aerator systems and two Roots blowers. The regulation pond body of aeration regulation pond 1 is half underground steel concrete structure, this body coupling of regulation pond is a water pump, and the water pump is beaten mine waste water to the regulation pond of aeration regulation pond 1 originally internally, and mine waste water gets into the system by aeration regulation pond 1 promptly, as shown in A in figure 1. The microporous aerator system comprises at least one microporous aerator, the microporous aerator is positioned inside the regulation and storage tank body, and the specification of the microporous aerator is DN 260. The Roots blower is connected with the microporous aerator through an aeration pipeline. The material of the aeration pipeline is ABS. The power of the Roots blower is 15 KW. The air is in strong contact with the water through aeration, oxygen in the air is dissolved in the water, and the air-water ratio is improved, so that the treatment load of the subsequent V-shaped filter 2 is reduced, and the filtering capacity of the V-shaped filter is improved. In addition, the aeration can also play a role in regulating water quantity and homogenizing water quality.

The V-shaped filter 2 comprises a filter body, a crane, a plurality of drainage pumps and a plurality of back-flushing drainage pumps. Preferably, an electric single-beam bridge crane, three draining pumps and two backwashing draining pumps are arranged.

The filter body is connected with the aeration storage tank 1, the filter body is of a semi-underground reinforced concrete structure, and the size is 10000mm, 20000mm, 5000mm (L, B, H). The filter chamber body is internally provided with a filter material layer, and the filter material of the filter material layer is formed by mixing various media such as quartz sand, anthracite and the like. The quartz sand and anthracite medium filter material has thicker and thicker particles, and a plurality of medium filter materials are uniformly arranged. Preferably, the quartz sand is 500m³And supporting filter material 60m³. Hoisting machineThe machine is used for replacing the filter material.

And the filter body is provided with an electric gate, a manual gate and a backwashing water outlet gate. The electric gate is used for controlling the time of water inlet and outlet by controlling the opening degree of the electric gate, and the manual gate is a door for people to go in and out of the filter body during maintenance. Preferably, the electric gate is a cast iron copper-inlaid square gate, and the manual gate is a manual cast iron copper-inlaid square gate. And after the backwashing water outlet gate is opened, the water of the backwashing cleaning filter body flows out. The drainage pump is used for pumping the wastewater in the aeration regulation pond 1 to the filter body of the V-shaped filter 2, the backwashing drainage pump is communicated with the filter body through a pipeline, and a backwashing water inlet switch valve is arranged on the pipeline and used for adjusting the water volume for cleaning the filter material. The backwashing drainage pump, the pipeline connected with the backwashing drainage pump and the backwashing water inlet switch valve on the pipeline form a backwashing device, the backwashing device is used for cleaning a filter material layer, the backwashing device provides flushing media flowing through the V-shaped filter tank 2, the flowing direction of the flushing media is opposite to that of wastewater, the flushing media comprise water, gas and the like, and the backwashing technical scheme is a technology well known by technical personnel in the field, does not influence the required technical scheme and is not repeated herein. The thickness of the filter material layer was 0.8 m. During back washing, the washing strength is 5L/m²S, gas washing intensity of 15L/m²And s, because the air-water ratio which does not expand the filter layer is adopted, and the surface cleaning function of water to be filtered is simultaneously adopted for back washing, the back washing effect of the filter tank is obviously improved, and the regeneration condition of the filtering capacity of the V-shaped filter tank is improved, so that the sewage interception capacity of the filter tank is increased, and the back washing frequency of the filter tank is reduced. In the embodiment, the filtration speed is 8m/h, the forced filtration speed is 10m/h, and the effluent turbidity is not higher than 5NTU under the normal operation condition.

Based on the structure, the wastewater to be treated enters the V-shaped filter tank 2 for filtering after being treated in the aeration regulation tank 1.

The reaction device comprises an activation adsorption reaction tank 3, a pH adjusting tank 4, a flocculation tank 5, a sedimentation tank 6 and a cloth filter tank 7.

The activation adsorption reaction tank 3 comprises a reaction tank body, an activation aeration device and a reaction tank stirring device. The V-shaped filter 2 is connected with the reaction tank body. Inverse directionThe reaction tank body is of a semi-underground steel concrete structure, and a nano medicament for adsorbing sulfate ions in the wastewater is arranged in the reaction tank body. In this embodiment, the volume of the reaction tank body is 6000m³And the retention time of the wastewater in the tank is 4 hours. In order to realize better plug flow, the reaction tank body is provided with more than eight grids, as shown in figure 2, a plurality of parallel baffles are arranged in the reaction tank body, liquid flows among the baffles to form an S-shaped liquid flow path, as shown in the arrow direction in figure 2, and the liquid retention reaction time is increased. The space between every two baffles is a grid.

The elements of the nano medicament comprise Fe, Al, Ba and Mg, wherein the mass content of the element Fe is 10-20%, the mass content of the element Al is 10-30%, the mass content of the element Ba is 30-60%, and the mass content of the element Mg is 20-40%.

The activated gas aeration device and the reaction tank stirring device are both connected with the reaction tank body. The activation aeration device provides activation gas for the reaction tank body, and comprises a plurality of sets of gas distribution plates and corresponding pipelines. The system also comprises an activated gas supply device 8, wherein the activated gas supply device 8 conveys the activated gas to a gas distribution plate in the reaction tank body through a pipeline, and the gas-water ratio is 3: 1. The activated gas delivered into the reaction tank body contacts the medicament, and the adsorption function of the adsorbed medicament is fully activated by the activated gas, so that the adsorption rate is increased and the adsorption time is shortened. The activating gas comprises O₂、N₂、CO₂And the like.

The stirring intensity of the stirring device is 4w/m³. Preferably, the stirring device is a submersible stirrer. The submersible mixer is the existing one on the market.

Based on the structure, the pretreated wastewater enters the reaction tank body from the V-shaped filter 2, contacts with the nano medicament activated by the activated gas in the reaction tank body, and fully reacts by stirring of the stirring device. The insoluble nano medicament adsorbs sulfate ions in the wastewater, and the desulfurization effect of the wastewater is realized. Pollutants such as chloride ions, nitrate ions, organic matters, soluble salts and the like are not added in the process of removing the sulfate, so that a new pollution problem is not caused.

The pH adjusting tank 4 comprises an adjusting tank body, an adjusting tank stirring device and a lime dosing system. The regulating reservoir body is connected with the reaction reservoir body. The size of the regulating reservoir body is 5000mm (L B H). Effective volume of 100m³Preferably, two regulating tank bodies are arranged, and the regulating tank bodies are of a semi-underground type steel concrete structure. The stirring device of the adjusting tank comprises two stirring devices with the stirring intensity of 4w/m³The two stirring machines are respectively connected with a regulating reservoir body. The lime dosing system is arranged into two sets, each set of lime dosing system is respectively connected with a regulating reservoir body, lime medicament is conveyed into the regulating reservoir body, and solution in the regulating reservoir body is contacted with the lime medicament. In this example, the reaction time of the solution from the reaction cell body in the adjustment cell body was 6min, and the pH value of the solution was adjusted to a target value.

The flocculation tank 5 comprises a flocculation tank body, a flocculation tank stirring device and a flocculation tank dosing device 9. In this embodiment, the flocculation basin body is semi-underground formula steel reinforced concrete structure, sets up two flocculation basin bodies, and the size of flocculation basin body is 5000mm (L B H), and effective volume is 100m³. The flocculation tank stirring device comprises two stirring devices with the stirring intensity of 4w/m³The two stirring machines are respectively connected with a flocculation tank body and used for stirring the solution in the flocculation tank body. Flocculation tank charge device 9 includes two sets of PAM charge systems, promptly the medicament is PAM (polyacrylamide), and every set of PAM charge system links up a flocculation tank body, toward this internal PAM medicament that adds of flocculation tank to as the flocculating agent.

The sedimentation tank 6 comprises two sedimentation tank bodies, two sludge scrapers, two sludge pumps, two sludge filter presses and two sludge pumps of 60m³The sludge concentration tank and two sets of adjusting weir gates. The sedimentation tank body is a radial sedimentation tank with a semi-underground steel concrete structure, and the size of the radial sedimentation tank is phi 24000mm plus 5000 mm. In this example, the surface load of the sedimentation tank body was 1.2m³/(m²H), particle settling velocity 1.0 m/h. The mud scraper is used for scraping the sludge at the bottom of the sedimentation tank body, and the sludge pump is used for conveying the sludge scraped by the mud scraper to the sludge concentration tank through the pump. The function of the concentration tank is to carry out sludge treatmentAnd (3) concentrating, specifically, returning supernatant on the upper part in a concentration tank to the front end of a sewage system, feeding sludge with high concentration on the bottom into a filter press, wherein the filter press is a belt filter press, and pressing the sludge into a mud cake by the belt filter press. The function of the adjusting weir is to control the liquid level of the sedimentation tank body.

The sedimentation tank body is connected with the flocculation tank body, and the reaction time of the solution from the pH adjusting tank 4 in the flocculation tank body and the sedimentation tank body is respectively 6 min. The solution with the adjusted pH value sequentially passes through the flocculation tank body and the sedimentation tank body to carry out flocculation precipitation reaction to form sludge and solution. The formed sludge is dehydrated by a sludge filter press to be made into a sludge cake, the water content of the fed material is 95-97%, and the water content of the discharged material is 45-55%.

The cloth filter 7 comprises two cloth filter bodies, the size of the cloth filter bodies is 6000mm 4000mm 5000mm, an outsourcing complete equipment of a circular rotary disc filter is adopted in the cloth filter bodies, and the treated water quantity is 1100m³H is used as the reference value. The filter cloth filter body is connected with the sedimentation tank body, and supernatant in the sedimentation tank body reaches the discharge standard or is directly recycled after being filtered by the filter cloth filter.

The effluent of the solution in the sedimentation tank 6 is filtered by the cloth filter 7 and then recycled or discharged, namely, the initial wastewater is discharged out of the system by the cloth filter 7 after being treated, as shown in the end B in figure 1, the sludge in the sedimentation tank 6 is made into a mud cake by a belt filter press, and the mud cake comprises the sludge and the nano medicament. And (5) enabling the mud cakes to enter a medicament recovery system for medicament recovery.

The agent recovery system mainly comprises a recovery tank 17, and a crusher 10, a rotary kiln 11, a leacher 12, an activation tower 13, a devulcanizer 14, a rotary drum filter 15 and a rotary dryer 16 which are connected in sequence.

The mud cake enters a crusher 10, is crushed by the crusher 10 and then enters a rotary kiln 11 for calcination, organic matters in the mud cake are subjected to thermal cracking gasification under the action of high temperature, and the remained product mainly contains nano-medicament. The remaining product is leached in the leacher 12 to further remove impurities and improve the concentration of the medicament in the product. Preferably, the extractor 12 is an auger screw extractor. The activation tower 13 is connected to the activation gas supply device 8, in other words, the activation gas supply device 8 supplies the activation gas to the activation tower 13. The product from the leacher 12 enters an activation tower 13 and is activated by contact with the activating gas therein. The activated product in the activation tower 13 enters the desulfurizing tank 14, the desulfurizing tank 14 is also connected with the recovery tank 17, the desulfurization is carried out in the desulfurizing tank 14 through the desulfurizing tank 14, the desulfurizing principle is that the desulfurizing tank 14 is added with sodium carbonate and heated to 90 ℃, the sodium sulfite is generated through full reaction, and the sulfur ions are removed in the step. And filtering a product generated by the reaction of the desulfurizing tank 14, enabling the solution to enter a recovery tank 17, enabling the generated sodium sulfite solution to enter the recovery tank 17, enabling most of sulfur elements to enter the recovery tank 17, and obtaining high-concentration sulfur-containing wastewater, wherein the high-concentration sulfur-containing wastewater is subjected to centralized treatment. The sulfur-free solid product is mainly a nano medicament product, and sequentially enters a rotary drum filter 15 for filtering and a rotary dryer 16 for drying, and is regenerated after being filtered and dried for reuse.

It should be noted that the waste water generated in the water washing recovery process can be treated by other methods, such as sodium sulfide or thiourea preparation. In this example, the daily recovery capacity of the water washing recovery apparatus 10 was about 100 tons, and the recovery capacity of the sodium sulfide or thiourea production facility was about 50 tons.

Finally, it must be said here that: the above embodiments are only used for further detailed description of the technical solutions of the present invention, and should not be understood as limiting the scope of the present invention, and the modifications and adjustments made by those skilled in the art according to the above-mentioned contents of the present invention are all included in the scope of the present invention.

Claims

1. The utility model provides a processing system for desorption mine water sulfate, a serial communication port, including effluent disposal system and medicament recovery system, effluent disposal system includes preprocessing device and reaction unit, preprocessing device includes aeration regulation pond (1) that carries out the aeration to waste water and carries out filterable V type filtering pond (2) to waste water, reaction unit is including activation adsorption reaction pond (3) that links up in proper order, pH equalizing basin (4), flocculation basin (5), sedimentation tank (6) and filter cloth filtering pond (7), activation adsorption reaction pond (3) still link up V type filtering pond (2), the nano-medicament that is used for adsorbing sulfate ion in waste water has been placed in activation adsorption reaction pond (3) pond, medicament recovery system includes recovery pond (17) and breaker (10) that links up in proper order, rotary kiln (11), leacher (12), activation tower (13), digester (14), A rotary drum filter (15) and a rotary dryer (16), wherein the crusher (10) is also connected with the sedimentation tank (6), and the recovery tank (17) is connected with the desulfurizing tank (14).

2. The treatment system for sulfating mine water according to claim 1, wherein: the aeration regulation and storage tank (1) comprises a regulation and storage tank body, at least one set of micropore aerator system and at least one Roots blower.

3. The treatment system for sulfating mine water according to claim 2, wherein: a filter material layer is arranged in the filter tank body, and filter materials of the filter material layer comprise quartz sand and anthracite.

4. The treatment system for sulfating mine water according to claim 1, wherein: activation adsorption reaction pond (3) are including reaction tank body, activation gas aeration device and reaction tank agitating unit, and activation gas aeration device and reaction tank agitating unit all link up the reaction tank body, and the reaction tank body still links up V type filtering pond (2), and this internal nano-medicament that is used for adsorbing sulfate ion in the waste water of placing of reaction tank.

5. The treatment system for sulfating mine water according to claim 4, wherein: a plurality of parallel baffles are arranged in the reaction tank body, and liquid flows among the baffles to form an S-shaped liquid flow path.

6. The treatment system for sulfating mine water according to claim 4, wherein: volume 6000m of reaction tank body³The reaction tank stirring device comprises a submersible stirrer, and the stirring intensity is 4w/m³。

7. The treatment system for sulfating mine water according to claim 1, wherein: the pH adjusting tank (4) comprises an adjusting tank body, an adjusting tank stirring device and a lime dosing system, and the adjusting tank body is connected with the reaction tank body.

8. The treatment system for sulfating mine water according to claim 1, wherein: the flocculation tank (5) comprises a flocculation tank body, a flocculation tank stirring device and a flocculation tank dosing device (9).

9. The treatment system for sulfating mine water according to claim 1, wherein: the sedimentation tank (6) comprises two sedimentation tank bodies, two sludge scrapers for scraping sludge from the sedimentation tank bodies, two sludge pumps for pumping sludge, two sludge filter presses, two sludge pumps of 60m³The sludge concentration tank and two sets of regulating weir gates for controlling the liquid level of the sedimentation tank body.

10. The treatment system for sulfating mine water according to claim 1, wherein: the system also comprises an activated gas supply device (8), and the activation tower (13) and the activation adsorption reaction tank (3) are connected with the activated gas supply device (8).