Two-stage mine water turbidity and fluorine removal and precipitation treatment device

Abstract

The utility model discloses a two -segmented mine water is coordinated and is removed turbidity, removes fluorine precipitate processing device, including the turbidity removal sedimentation section and the coordinated sedimentation section who sets up in intercommunication, turbidity removal sedimentation section includes one stage first mixed area, one stage second mixed area, one stage flocculation area and one stage sedimentation area, and one stage sedimentation area and one stage second mixed area still are connected with one stage circulation area, the coordinated sedimentation section includes two stage first mixed area, two stage second mixed area, two stage flocculation area and two stage sedimentation area, and two stage sedimentation area and two stage second mixed area still are connected with two stage circulation area, and one stage sedimentation area intercommunication two stage first mixed area, the utility model discloses a turbidity removal sedimentation section and the coordinated sedimentation section who sets up in intercommunication, and turbidity removal sedimentation section reduces the turbidity through higher hydraulic load, and reduces the suspended solids in mine water, and in the coordinated sedimentation section water, there is a certain amount of suspended solids and microsand together with the improvement coal slime's drop characteristic, and the sedimentation effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of mine water treatment technology, specifically to a two-stage mine water synergistic turbidity removal and fluoride removal precipitation treatment device. Background Technology

[0002] Mine water can be mainly classified into the following categories: clean mine water, mine water containing suspended solids, high-mineralization mine water, acidic mine water, and mine water containing special pollutants. Among these, mine water containing suspended solids accounts for approximately 60% of the total drainage from some key state-owned coal mines in northern my country. The suspended solids in this mine water mainly originate from coal dust, rock dust, and other particulate matter generated during coal mining, and secondarily contain some ions, a small amount of organic matter, and a large number of bacteria. Its main water quality characteristics are: the drainage contains a large amount of suspended solids, primarily composed of coal dust, and also contains small amounts of heavy metal ions and oils. The specific gravity of coal dust is generally only 1.5 g / cm³. 3 It is much smaller than the specific gravity of silt particles in surface water systems (the average density is generally 2.4–2.6 g / cm³). 3 (The self-settling effect is poor.) Coagulation and sedimentation is the basic principle of mine water suspended solids removal technology.

[0003] The basic principle of coagulation sedimentation is to add coagulants such as PAC and PAM to wastewater, forming flocs that neutralize the charge of colloidal substances in the wastewater, resulting in floc settling. Coagulation sedimentation can remove not only fine suspended particles from wastewater, but also color, oil, microorganisms, nutrients such as nitrogen and phosphorus, heavy metals, and organic matter.

[0004] The most commonly used equipment for coagulation and sedimentation treatment of mine water includes inclined plate sedimentation tanks and high-efficiency sedimentation tanks with sludge return.

[0005] An inclined plate sedimentation tank consists of two parallel inclined plates separated by a shallow sedimentation tank. This allows the treated water (or wastewater) and the settled sludge to move and separate within the shallow sedimentation layer. Based on the forces acting on these moving plates, separation can be categorized into three different methods: co-current flow, counter-current flow, and lateral flow. The inclined plate sedimentation tank utilizes the principle of "shallow sedimentation," shortening the particle settling distance, thus reducing sedimentation time and increasing the sedimentation area of ​​the tank, thereby improving treatment efficiency.

[0006] The high-efficiency sedimentation tank with sludge return is based on the inclined plate sedimentation tank, with the addition of a sludge return pump set and pipeline. Part of the sludge in the sedimentation tank is pumped back to the flocculation reaction zone, thereby improving the efficiency of reagent utilization and the speed of flocculation reaction. At the same time, the sludge with good settling properties in the sedimentation zone also helps to improve the sedimentation effect, thus further optimizing the inclined plate sedimentation device.

[0007] This device is currently widely used, but it has drawbacks such as large dosage, large footprint, slow settling speed of suspended solids, poor effect of sedimentation on fluoride treatment, and large amount of sludge due to mixing of settled coal slime and defluorinated sludge. Existing technology cannot meet the requirements of on-site expansion and renovation of mine water, upgrading of fluoride treatment, and on-site treatment of mine water in coal mines. Summary of the Invention

[0008] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a two-stage mine water synergistic turbidity and fluoride removal precipitation treatment device, which solves the problems of large reagent dosage, large device footprint, slow settling speed of suspended solids, and poor fluoride treatment effect in existing technologies.

[0009] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a two-stage mine water turbidity removal and defluorination precipitation treatment device, comprising a turbidity removal precipitation section and a synergistic precipitation section connected in series.

[0010] The turbidity removal and sedimentation section includes a primary mixing zone, a secondary mixing zone, a flocculation zone, and a sedimentation zone arranged in sequence. A circulation zone is also connected between the sedimentation zone and the secondary mixing zone.

[0011] The synergistic sedimentation section includes two primary mixing zones, two secondary mixing zones, two flocculation zones, and two sedimentation zones that are connected in sequence. The two sedimentation zones and the two secondary mixing zones are also connected by two circulation zones.

[0012] The aforementioned sedimentation zone is connected to the two primary mixing zones.

[0013] This utility model also has the following technical features:

[0014] A primary mixer is installed in the primary mixing zone.

[0015] A secondary mixer is installed in the aforementioned secondary mixing zone.

[0016] A flocculation agitator is installed within the aforementioned flocculation zone.

[0017] A sedimentation inclined plate is installed in the sedimentation zone.

[0018] The aforementioned circulation zone includes a micro-sand circulation pump, which connects the bottom of a sedimentation zone and a secondary mixing zone.

[0019] The two-stage primary mixing zone is equipped with a two-stage primary agitator.

[0020] The two-stage mixing zone is equipped with a two-stage agitator.

[0021] The two-stage flocculation zone is equipped with two-stage flocculation agitators.

[0022] Two sedimentation inclined plates are installed in the two-stage sedimentation zone.

[0023] The two-stage circulation zone is equipped with a two-stage sludge circulation pump, which connects the bottom of the two-stage sedimentation zone and the two-stage secondary mixing zone.

[0024] A secondary exhaust port is also installed on the aforementioned secondary mixing zone.

[0025] A flocculation vent is also installed on the aforementioned flocculation zone.

[0026] The aforementioned sedimentation zone is also equipped with a sedimentation vent and an inspection port.

[0027] The two-stage secondary mixing zone is also equipped with two-stage secondary exhaust ports.

[0028] The two-stage flocculation zone is also equipped with two-stage flocculation exhaust ports.

[0029] The two-stage sedimentation zone is also equipped with a two-stage sedimentation vent and a two-stage maintenance port.

[0030] Compared with the prior art, this utility model has the following technical effects:

[0031] (I) This utility model provides a two-stage mine water synergistic turbidity removal and defluorination sedimentation treatment device. By connecting a turbidity removal sedimentation section and a synergistic sedimentation section, the turbidity removal sedimentation section reduces turbidity through a high hydraulic load, thereby reducing suspended solids in the mine water. In the synergistic sedimentation section, a certain amount of suspended solids and micro-sand in the water improves the turbidity characteristics of coal slime, enhancing the sedimentation effect. Simultaneously, it avoids the waste of defluorination agent due to excessive suspended solids, effectively reducing the dosage of defluorination agent. Through the combined control of the two stages, the dosage ratio of the front-end PAC and the rear-end defluorination agent can be adjusted according to changes in water quality and quantity, achieving optimal agent combination.

[0032] (II) The present invention provides a two-stage mine water synergistic turbidity removal and defluorination sedimentation treatment device. By adding high-density quartz sand, the flocculation process occurs on the surface of the quartz sand. By taking advantage of the high specific gravity of quartz sand, the sludge's settling properties are improved, the sedimentation rate is accelerated, and the hydraulic retention time is reduced.

[0033] (III) The two-stage mine water synergistic turbidity removal and fluoride removal precipitation treatment device provided by this utility model has a simple structure, is easy to operate, safe and reliable, and has strong adaptability. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of this utility model. Figure I .

[0035] Figure 2 This is a schematic diagram of the structure of this utility model. Figure II .

[0036] Figure 3 This is a schematic diagram of the external structure of this utility model.

[0037] The meanings of the labels in the attached diagram are as follows:

[0038] 1-Turbidity removal and precipitation section, 2-Co-precipitation section.

[0039] 1-1-First stage mixing zone, 1-2-First stage secondary mixing zone, 1-3-First stage flocculation zone, 1-4-First stage sedimentation zone, 1-5-First stage circulation zone, 1-6-First stage agitator, 1-7-First stage secondary agitator, 1-8-First stage flocculation agitator, 1-9-First stage sedimentation inclined plate, 1-10-First stage micro-sand circulation pump, 1-11-First stage secondary exhaust port, 1-12-First stage flocculation exhaust port, 1-13-First stage sedimentation exhaust port, 1-14-First stage maintenance port.

[0040] 2-1-Second stage primary mixing zone, 2-2-Second stage secondary mixing zone, 2-3-Second stage flocculation zone, 2-4-Second stage sedimentation zone, 2-5-Second stage circulation zone, 2-6-Second stage primary agitator, 2-7-Second stage secondary agitator, 2-8-Second stage flocculation agitator, 2-9-Second stage sedimentation inclined plate, 2-10-Second stage sludge circulation pump, 2-11-Second stage secondary exhaust port, 2-12-Second stage flocculation exhaust port, 2-13-Second stage sedimentation exhaust port, 2-14-Stage inspection port.

[0041] The specific content of this utility model will be further explained in detail below with reference to the embodiments. Detailed Implementation

[0042] Unless otherwise specified, all components in this invention are made from components known in the prior art.

[0043] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments. All equivalent modifications made based on the technical solutions of this application fall within the protection scope of the present invention.

[0044] Example 1:

[0045] This embodiment provides a two-stage mine water synergistic turbidity and fluoride removal precipitation treatment device, such as... Figures 1-3 As shown, it includes a turbidity removal precipitation section 1 and a co-precipitation section 2 that are connected together.

[0046] The turbidity removal and sedimentation section 1 includes a primary mixing zone 1-1, a secondary mixing zone 1-2, a flocculation zone 1-3, and a sedimentation zone 1-4 connected in sequence. A circulation zone 1-5 is also connected between the sedimentation zone 1-4 and the secondary mixing zone 1-2.

[0047] The co-precipitation section 2 includes two primary mixing zones 2-1, two secondary mixing zones 2-2, two flocculation zones 2-3 and two sedimentation zones 2-4 connected in sequence. A two-stage circulation zone 2-5 is also connected between the two sedimentation zones 2-4 and the two secondary mixing zones 2-2.

[0048] The aforementioned sedimentation zone 1-4 is connected to the two-stage primary mixing zone 2-1.

[0049] The turbidity removal and sedimentation section 1 is the front end, which includes a primary mixing zone 1-1 as a PAC mixing reaction zone, a secondary mixing zone 1-2 as a PAM mixing reaction zone, a flocculation zone 1-3 as a micro-sand reflux mixing zone, a sedimentation zone 1-4 as a buffer sedimentation zone, and a circulation zone 1-5.

[0050] The co-precipitation section 2 is the later stage, including the second-stage primary mixing zone 2-1 as the PFC mixing reaction zone, the second-stage secondary mixing zone 2-2 as the PAM mixing reaction zone, the second-stage flocculation zone 2-3 as the micro-sand reflux mixing zone, the second-stage sedimentation zone 2-4 as the co-precipitation zone, and the second-stage circulation zone 2-5.

[0051] This invention employs a two-stage sedimentation device. In the initial stage, a high hydraulic load reduces turbidity, decreasing suspended solids in the mine water. In the subsequent stage, a certain amount of suspended solids and fine sand in the water improves the sedimentation properties of the coal slime, enhancing the sedimentation effect. Simultaneously, it avoids the waste of defluoridating agent due to excessive suspended solids, effectively reducing the dosage of defluoridating agents. Through this two-stage combined control, the dosage ratio of the front-end PAC and the rear-end defluoridating agent can be adjusted according to changes in water quality and quantity, achieving optimal agent combination.

[0052] The aforementioned PAC mixed reaction typically refers to the synergistic effect of polyaluminum chloride (PAC) with other chemical agents or materials in water treatment or chemical processes, achieving the removal of pollutants or the transformation of substances through physical or chemical reactions.

[0053] The aforementioned PAM mixing reaction typically refers to the synergistic effect of polyacrylamide (PAM) with other chemical agents or materials to achieve pollutant removal, substance separation, or performance enhancement through physical or chemical reactions.

[0054] The PFC mixed reaction mentioned refers to the degradation reaction of perfluorinated compounds (PFCs) in environmental engineering.

[0055] The PAC, PAM, and PFC mentioned above are all products based on existing technologies.

[0056] The initial sedimentation stage consists mainly of coal slime, while the subsequent sedimentation stage consists mainly of a mixture of defluorination sludge and some coal slime. The coal slime from the initial sedimentation stage has higher utilization value, thus improving resource recycling.

[0057] As a preferred embodiment:

[0058] A primary mixer 1-6 is installed in the primary mixing zone 1-1.

[0059] A secondary mixer 1-7 is installed in the secondary mixing zone 1-2.

[0060] A flocculation agitator 1-8 is installed in the flocculation zone 1-3.

[0061] A settling inclined plate 1-9 is installed in the settling zone 1-4.

[0062] A micro-sand circulation pump 1-10 is installed in the circulation zone 1-5. The micro-sand circulation pump 1-10 is connected to the bottom of the sedimentation zone 1-4 and the secondary mixing zone 1-2.

[0063] As a preferred embodiment:

[0064] The two-stage primary mixing zone 2-1 is equipped with a two-stage primary mixer 2-6.

[0065] The two-stage two-level mixing zone 2-2 is equipped with a two-stage two-level agitator 2-7.

[0066] The two-stage flocculation zone 2-3 is equipped with a two-stage flocculation agitator 2-8.

[0067] The two-stage sedimentation zone 2-4 is equipped with two-stage sedimentation inclined plates 2-9.

[0068] A two-stage sludge circulation pump 2-10 is installed in the two-stage circulation zone 2-5. The two-stage sludge circulation pump 2-10 is connected to the bottom of the two-stage sedimentation zone 2-4 and the two-stage secondary mixing zone 2-2.

[0069] As a preferred embodiment:

[0070] A secondary exhaust port 1-11 is also installed on the secondary mixing zone 1-2.

[0071] A flocculation vent 1-12 is also installed on the aforementioned flocculation zone 1-3.

[0072] The sedimentation zone 1-4 is also equipped with a sedimentation vent 1-13 and an inspection port 1-14.

[0073] As a preferred embodiment:

[0074] The two-stage secondary mixing zone 2-2 is also equipped with a two-stage secondary exhaust port 2-11.

[0075] The two-stage flocculation zone 2-3 is also equipped with a two-stage flocculation exhaust port 2-12.

[0076] The two-stage sedimentation zone 2-4 is also equipped with a two-stage sedimentation vent 2-13 and a two-stage maintenance port 2-14.

[0077] The specific working process of this utility model:

[0078] Turbidity removal and precipitation section:

[0079] The raw mine wastewater enters the first-stage mixing zone 1-1, where it is rapidly mixed with polyaluminum chloride by the first-stage agitator 1-6, thus completing the destabilization of suspended solids.

[0080] The mixture enters the first-stage secondary mixing zone 1-2, where it is slowly stirred in the first-stage secondary agitator 1-7 to dissolve the added polyacrylamide and fully mix it with the micro-sand. The suspended matter then coagulates to form fine flowers.

[0081] The mixture enters the first flocculation zone 1-3, and is slowly stirred by the first flocculation agitator 1-8, causing the small flocs to gradually grow into larger flocs.

[0082] The mixed liquid enters a sedimentation zone 1-4, and the clear water flows into the co-sedimentation zone (rear section) 2 after passing through a sedimentation inclined plate 1-9.

[0083] A micro-sand circulation pump 1-10 is installed in the first circulation zone 1-5 to pump up the coal slime settled in the first sedimentation zone 1-4 and circulate it back to the first secondary mixing zone 1-2.

[0084] Collaborative sedimentation stage (backend):

[0085] The effluent from the turbidity removal and sedimentation section (front section) 1 enters the second-stage primary mixing zone 2-1, where it is thoroughly mixed with polyaluminum chloride under the rapid stirring of the second-stage primary agitator 2-6, thus completing the destabilization of suspended solids.

[0086] The mixture enters the second-stage mixing zone 2-2, where it is rapidly stirred in the second-stage agitator 2-7. This dissolves the added defluoridating agent and mixes it thoroughly with the micro-sand. The fluoride in the water produces insoluble suspended solids, which then undergo a coagulation reaction with the water treatment agent.

[0087] The mixture enters the second-stage flocculation zone 2-3, where the second-stage flocculation agitator 2-8 slowly stirs the mixture to fully dissolve the added polyacrylamide and form flocs. The flocs are then removed from the water through adsorption bridging and netting.

[0088] The mixed liquor enters the second-stage sedimentation zone 2-4, the clear water is discharged after passing through the second-stage sedimentation inclined plate 2-9, and the sludge settles to the bottom of the tank.

[0089] The second-stage sludge circulation pump 2-10 is installed in the second-stage circulation zone 2-5. It pumps up the coal sludge settled in the second-stage sedimentation zone 2-4 and circulates it back to the second-stage secondary mixing zone 2-2. On the one hand, the recirculation allows the chemicals to react fully, saving on the amount of chemicals added. On the other hand, by recirculating the loose sludge at the rear end, it fully utilizes the adsorption capacity of the sludge flocs to further remove fluoride from the water.

[0090] After running for a period of time, the tank can be emptied for maintenance through a secondary vent 1-11, a flocculation vent 1-12, and a sedimentation vent 1-13.

[0091] After a period of operation, the tank can be emptied for maintenance through the two-stage secondary vent 2-11, the two-stage flocculation vent 1-12, and the two-stage sedimentation vent 2-13.

[0092] The aforementioned inspection ports 1-14 and 2-14 are channels for personnel to enter and exit the equipment during maintenance.

[0093] The above technical solutions are only preferred embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be conceived by those skilled in the art without creative effort within the technical scope disclosed in this utility model are covered within the protection scope of this utility model.

Claims

1. A two-stage mine water synergistic turbidity removal and defluorination precipitation treatment device, characterized in that, It includes a turbidity removal precipitation section (1) and a co-precipitation section (2) that are connected together; The turbidity removal and sedimentation section (1) includes a primary mixing zone (1-1), a secondary mixing zone (1-2), a flocculation zone (1-3), and a sedimentation zone (1-4) that are connected in sequence. A circulation zone (1-5) is also connected between the sedimentation zone (1-4) and the secondary mixing zone (1-2). The co-precipitation section (2) includes two primary mixing zones (2-1), two secondary mixing zones (2-2), two flocculation zones (2-3), and two sedimentation zones (2-4) arranged in sequence. The two sedimentation zones (2-4) and the two secondary mixing zones (2-2) are also connected by a two-stage circulation zone (2-5). The aforementioned sedimentation zone (1-4) is connected to the two primary mixing zones (2-1).

2. The two-stage mine water synergistic turbidity removal and defluorination precipitation treatment device as described in claim 1, characterized in that, A primary mixer (1-6) is installed in the primary mixing zone (1-1); A secondary mixer (1-7) is installed in the aforementioned secondary mixing zone (1-2); A flocculation agitator (1-8) is installed in the aforementioned flocculation zone (1-3); A settling inclined plate (1-9) is installed in the settling zone (1-4); A micro-sand circulation pump (1-10) is installed in the circulation zone (1-5), and the micro-sand circulation pump (1-10) is connected to the bottom of the sedimentation zone (1-4) and the secondary mixing zone (1-2).

3. The two-stage mine water synergistic turbidity removal and defluorination precipitation treatment device as described in claim 1, characterized in that, A two-stage primary mixer (2-6) is installed in the two-stage primary mixing zone (2-1); The two-stage two-level mixing zone (2-2) is equipped with a two-stage two-level agitator (2-7); The two-stage flocculation zone (2-3) is equipped with a two-stage flocculation agitator (2-8); Two sedimentation inclined plates (2-9) are installed in the two-stage sedimentation zone (2-4); The two-stage circulation zone (2-5) is equipped with a two-stage sludge circulation pump (2-10), which is connected to the bottom of the two-stage sedimentation zone (2-4) and the two-stage secondary mixing zone (2-2).

4. The two-stage mine water synergistic turbidity removal and defluorination precipitation treatment device as described in claim 2, characterized in that, A secondary exhaust port (1-11) is also installed on the aforementioned secondary mixing zone (1-2); A flocculation vent (1-12) is also installed on the aforementioned flocculation zone (1-3); The sedimentation zone (1-4) is also equipped with a sedimentation vent (1-13) and an inspection port (1-14).

5. The two-stage mine water synergistic turbidity removal and defluorination precipitation treatment device as described in claim 2, characterized in that, The two-stage secondary mixing zone (2-2) is also equipped with a two-stage secondary exhaust port (2-11); The two-stage flocculation zone (2-3) is also equipped with two-stage flocculation exhaust ports (2-12); The two-stage sedimentation zone (2-4) is also equipped with a two-stage sedimentation vent (2-13) and a two-stage maintenance port (2-14).

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