A variable flow leaching integrated device

Abstract

The invention discloses a variable flow leaching integrated device, including a liquid preparation and collection area, a leaching column, a water distribution tank and a bracket. The invention has the beneficial effects of realizing the integration of liquid preparation, liquid inlet and collection, the liquid preparation area has a stirring function, and can reduce the situation of manpower and uneven mixing when simulating acid rain, the liquid preparation area is equipped with an online pH monitor, and the specific situation of simulating acid rain is conveniently and quickly observed, the liquid inlet flow is adjustable, and the influence of different rainfall intensities in different regions on the dissolution of pollutants is better simulated, the height is variable, and the influence of rainwater penetration time of different pile height slag piles on the dissolution of pollutants is studied, which is closer to the actual situation than the laboratory device, and a plug valve is set to facilitate the engineering loading and unloading of slag, and the slag can be effectively contained while ensuring the outflow of the leaching solution, the material is acid and corrosion resistant, and the use of a certain solid is not restricted, and the leaching experiment of general industrial solid waste, hazardous waste, urban construction waste, soil and the like can be studied.

Description

Technical Field

[0001] The invention relates to an integrated leaching device, in particular to an integrated leaching device with a variable flow rate, and belongs to the technical field of industrial waste residue and soil treatment. Background Art

[0002] With the sustained and stable development of the national economy, my country's mining and smelting industries have developed rapidly. However, due to multiple reasons such as the long-term extensive and backward production methods and lagging environmental protection management in the region, there are a large number of tailings, slag, coal gangue, smelting waste slag and smelter demolition construction waste randomly dumped, and most of the solid wastes are directly stored in direct contact with the surrounding surface soil. After leaching with media such as rainwater, they may cause serious harm to the surrounding water bodies, groundwater and soil. In order to have a more scientific and targeted understanding of the impact of rainfall intensity and acid rain on pollutants in the leaching solution generated by a certain solid during the leaching process, it is particularly necessary to provide leaching data for subsequent solid waste storage management and conduct risk assessment.

[0003] At present, most of the existing leaching devices remain in the laboratory stage and have the following problems: First, the filling height and volume of the leaching column are small, and the amount of filling slag is too small, which is not close to the stockpile height and the overall situation of the filler under natural conditions, and it is easy to cause experimental data deviation; second, the flow control is single and cannot accurately simulate the actual rainfall under different rainstorm intensities; third, most of the leaching liquids are prepared before the experiment and separated from the whole set of equipment, and cannot be operated in an integrated manner. Summary of the invention

[0004] The purpose of the present invention is to improve the shortcomings of existing leaching devices and to provide a variable flow leaching integrated device that can conduct experimental research on the leaching conditions of soluble components contained in solids such as general industrial solid waste, hazardous waste, construction waste, soil, etc. when leaching under water medium conditions, and analyze the possible harm to water bodies, groundwater, and soil.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions: a variable flow leaching integrated device, comprising 1. a liquid preparation and liquid collection area, a leaching column, a water distribution trough and a bracket, wherein the liquid preparation and liquid collection area is divided into a left liquid preparation area and a right liquid collection area by a partition in the middle of a square trough body, an online pH monitor is installed on the liquid preparation and liquid collection area, an inlet valve is installed at the water inlet end of the liquid preparation and liquid collection area of ​​the liquid preparation and liquid collection area, an outlet valve is installed at the water outlet end of the liquid collection area of ​​the liquid preparation and liquid collection area, and a switch is connected between the left liquid preparation area and the right liquid collection area of ​​the liquid preparation and liquid collection area. The liquid collecting area of ​​the liquid preparation area is connected with a valve, a stirrer is arranged in the liquid collecting area of ​​the liquid preparation area to fully mix the reagents required for simulating acid rain, and the stirrer is located at the outer end of the liquid collecting area of ​​the liquid preparation area and is electrically connected to the electric control cabinet, and the output end of the electric control cabinet is electrically connected to the metering pump, the liquid preparation area and the leaching column are connected through a connecting pipe, and a needle valve and a flow meter are installed on the connecting pipe between the liquid preparation area and the leaching column, and the leaching column is composed of a plurality of cylinders, and the bottom and upper ends of the cylinders of the leaching column Flanges are welded respectively, and the cylinder is fixedly connected by the flanges. The upper end of the first section of the cylinder of the elution column is connected to the inlet head, and the arc top opening of the inlet head is connected to the water inlet pipe and fixes the nozzle. A water distribution trough is arranged on the upper part of the first section of the cylinder of the elution column, and a perforated disc is arranged at the bottom of the water distribution trough. The outer side of the top of the water distribution trough is fixedly connected to the ring by welding, and a water distribution layer is placed on the perforated disc of the water distribution trough. A visual window is arranged on the cylinder of the elution column, and a ring bracket is arranged on the outer side of the elution column. An inspection port is arranged on the last section of the cylinder of the leaching column, the lower end of the last section of the cylinder is connected to the gate valve through the flange, the lower flange of the gate valve is connected to the water outlet head, the water outlet valve is installed at the arc top opening of the water outlet head, the bracket includes guardrails, stairs, tripods, and an operating platform, the guardrails are vertically arranged on the upper end of the tripod, the tripod is made of a number of stainless steel materials connected and fixed by nuts, and stairs are arranged on the outside of the tripod, the operating platform is located above the tripod, and the bracket places the leaching column through the operating platform.

[0006] Preferably, in order to simulate different rainfall intensities, the metering pump accurately controls the output liquid flow rate through the coordinated use of two needle valves and a flow meter, and the flow meter range is 0 to 60 L / h.

[0007] Preferably, in order to facilitate the observation of the pH data of the simulated acid rain preparation liquid, the online pH monitor installed in the preparation and collection area is of model SIN-PH, and the online pH monitor is electrically connected to the display terminal.

[0008] Preferably, in order to realize panel integrated operation, the metering pump, agitator, and online pH monitoring are all electrically connected to the electric control cabinet.

[0009] Preferably, in order to simulate the actual slag or soil height and facilitate transportation, the leaching column is composed of a plurality of cylinders, which are connected in an assembled manner.

[0010] Preferably, in order to facilitate observation of water distribution and prevent slag blockage, a visual window is provided on each cylinder of the leaching column, and an inspection port is provided on the last cylinder of the leaching column.

[0011] Preferably, in order to be able to assemble according to actual simulation needs and at the same time increase the service life of the device, each section of the leaching column made of anti-corrosion material is 50cm to 200cm high, the inner radius of the cylinder is 10 to 50cm, the wall thickness is 2 to 3cm, and the overall height is 50cm to 600cm.

[0012] Preferably, in order to realize the recycling of the leaching water, the left liquid preparation area and the right liquid collection area of ​​the liquid preparation and collection area are connected or disconnected by a switch valve.

[0013] Preferably, in order to distribute water more evenly and prevent wall flow, the water distribution trough is sealed with a perforated disc with water-permeable holes of 2 mm in diameter, with holes arranged horizontally and vertically, and the water distribution layer is composed of quartz sand with a layer height of 10 cm.

[0014] Preferably, in order to facilitate hanging on the cylinder flange, the wall thickness of the circular ring welded on the upper end of the water distribution trough is 1 cm.

[0015] Preferably, in order to support the entire cylinder to be placed on the operating platform, the circular ring bracket is located above the middle section of the cylinder, and six tripods are welded on the circular ring bracket.

[0016] Preferably, in order to facilitate the fixing and placement of the leaching column, the bracket is made of stainless steel and painted on the surface for anti-corrosion, with a total length of 1500mm, a total height of 2300mm, and a total width of 1000mm; the guardrail is 1500mm long and 1000mm high, the stairs are 600mm wide, 2200mm high, 1500mm long and 1000mm wide, and a circular hollow is made in the middle right position of the operating platform.

[0017] Preferably, in order to facilitate disassembly and transportation, the guardrail, stairs, footrest and operating platform are detachably connected by connecting bolts.

[0018] The beneficial effects of the present invention are as follows: the variable flow rate leaching integrated device is reasonably designed, liquid preparation, liquid feeding and collection are integrated, the equipment is easy to disassemble and assemble, and is convenient for transportation.

[0019] The liquid preparation area is equipped with a stirring function, which can reduce manpower and uneven mixing when simulating acid rain.

[0020] An online pH monitor is installed in the liquid preparation area to conveniently and quickly observe the specific conditions of the simulated acid rain.

[0021] The device has an adjustable liquid inlet flow rate and accurate metering, which can better simulate the impact of different rainfall intensities in different regions on pollutant dissolution.

[0022] The height of the device is variable, and it can study the effect of rainwater penetration time on pollutant dissolution in slag piles of different heights, which is closer to reality than laboratory devices.

[0023] The device is equipped with a gate valve to facilitate the loading and unloading of slag, ensuring that the leaching solution can flow out while the slag can be effectively contained.

[0024] The device takes into account the main characteristics of the solid waste loaded; the material is acid and corrosion resistant, and does not restrict the use of certain solids. It can conduct leaching experiments on general industrial solid waste, hazardous waste, urban construction waste, soil, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the structure of the present invention in side view and top view;

[0027] Figure 3 It is a schematic diagram of the structure of the operating platform of the present invention from the front, side and top views.

[0028] In the figure: 1, liquid preparation and collection area, 2, leaching column, 3, water distribution tank, 4, bracket, 11, needle valve, 12, flow meter, 13, metering pump, 14, agitator, 15, switch valve, 16, water inlet valve, 17, liquid outlet valve, 18, partition, 19, electric control cabinet, 20, online pH monitor, 21, nozzle, 22, inlet head, 23, flange, 24, visual window, 25, inspection port, 26, plug valve, 27, outlet head, 28, water outlet valve, 29, ring bracket, 31, water distribution layer, 32, perforated disc, 33, ring, 41, guardrail, 42, stairs, 43, tripod and 44, operating platform. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figures 1 to 3A variable flow leaching integrated device comprises a liquid preparation and liquid collection area 1, a leaching column 2, a water distribution tank 3 and a bracket 4. The liquid preparation and liquid collection area 1 is divided into a left liquid preparation area and a right liquid collection area by a partition 18 in the middle of a square tank body. An online pH monitor 20 is installed on the liquid preparation and liquid collection area 1. An inlet valve 16 is installed at the water inlet end of the liquid preparation area of ​​the liquid preparation and liquid collection area 1, and an outlet valve 17 is installed at the water outlet end of the liquid collection area of ​​the liquid preparation and liquid collection area 1. The left liquid preparation area and the right liquid collection area of ​​the liquid preparation and liquid collection area 1 are connected by a switch valve 15. A stirring device is arranged in the liquid collection area of ​​the liquid preparation and liquid collection area 1. The stirrer 14 is used to fully mix the reagents required for simulating acid rain, and the outer end of the stirrer 14 located in the liquid collecting area of ​​the liquid preparation and liquid collection area 1 is electrically connected to the electric control cabinet 19, and the output end of the electric control cabinet 19 is electrically connected to the metering pump 13. The liquid preparation and liquid collection area 1 is connected to the elution column 2 through a connecting pipe, and a needle valve 11 and a flow meter 12 are installed on the connecting pipe between the liquid preparation and liquid collection area 1 and the elution column 2. The elution column 2 is composed of a plurality of cylinders, and flanges 23 are respectively welded to the bottom and the upper end of the cylinder of the elution column 2, and the connecting cylinder is fixed by the flange 23. The upper end of the first section of the cylinder of the leaching column 2 is connected to the inlet head 22, and the arc top opening of the inlet head 22 is connected to the water inlet pipe and fixed with the nozzle 21. The upper part of the first section of the cylinder of the leaching column 2 is provided with a water distribution trough 3, and the bottom of the water distribution trough 3 is provided with a perforated disc 32. The outer side of the top of the water distribution trough 3 is fixedly connected to the ring 33 by welding, and a water distribution layer 31 is placed on the perforated disc 32 of the water distribution trough 3. A visual window 24 is arranged on the cylinder of the leaching column 2, and a circular ring bracket 29 is arranged on the outer side of the leaching column 2. An inspection port 25 is arranged on the last section of the cylinder of the leaching column 2. The lower end of the last section of the cylinder is connected to the gate valve 26 through the flange 23, the lower flange of the gate valve 26 is connected to the water outlet head 27, the arc top opening of the water outlet head 27 is provided with a water outlet valve 28, the bracket 4 comprises a guardrail 41, a staircase 42, a tripod 43, and an operating platform 44, the guardrail 41 is vertically arranged on the upper end of the tripod 43, the tripod 43 is made of a plurality of stainless steel materials connected and fixed by nuts, and a staircase 42 is arranged on the outside of the tripod 43, the operating platform 44 is located above the tripod 43, and the bracket 4 places the leaching column 2 through the operating platform 44.

[0031] The metering pump 13 accurately controls the output liquid flow rate through the cooperation of two needle valves 11 and a flow meter 12, and the flow meter 12 has a range of 0 to 60 L / h. By controlling the needle valve 11 to simulate different rainfall intensities, the range can meet the requirements of simulating light rain, moderate rain, heavy rain, and extremely heavy rain. The online PH monitor 20 installed in the liquid preparation and collection area 1 is model SIN-PH160, and the online PH monitor 20 is electrically connected to the display terminal, which can conveniently observe the PH data of the simulated acid rain preparation liquid. The metering pump 13, the stirrer 14, and the online PH monitor 20 are all electrically connected to the electric control cabinet 19 to achieve surface The leaching column 2 is composed of several cylinders, which are connected in an assembled manner and can be freely disassembled and assembled. It can simulate the actual slag or soil height and is convenient for transportation. Each cylinder of the leaching column 2 is provided with a visual window 24, and an inspection port 25 is provided on the last cylinder of the leaching column 2, which is convenient for observing the water distribution and can prevent slag blockage. The leaching column 2 made of anti-corrosion material has a height of 50cm to 200cm for each cylinder, a radius of the inner circle of the cylinder of 10 to 50cm, a wall thickness of 2 to 3cm, and an overall height of 50cm to 600cm. It can be assembled according to actual simulation needs, and at the same time improve the device The service life of the liquid dispensing and collecting area 1 is controlled by the switch valve 15 to control the connection or isolation between the left liquid dispensing area and the right liquid collecting area, so that the leaching water can be recycled. The water distribution tank 3 is sealed with a perforated disc 32, and the perforated disc 32 has a water-permeable hole with a diameter of 2mm, and the holes are arranged horizontally and vertically. The water distribution layer 31 is composed of quartz sand with a layer height of 10cm. It is set to distribute water more evenly and prevent wall flow. The ring 33 welded on the upper end of the water distribution tank 3 has a wall thickness of 1cm and is used to hang on the cylinder flange. The ring bracket 29 is located above the middle section of the cylinder, and six tripods 43 are welded on the ring bracket 29 for fixing The bracket 4 and the cylinder can support the entire cylinder to be placed on the operating platform 44. The bracket 4 is made of stainless steel and is painted on the surface for anti-corrosion. The total length is 1500mm, the total height is 2300mm, and the total width is 1000mm; the guardrail 41 is 1500mm long and 1000mm high, the staircase 42 is 600mm wide, 2200mm high, 1500mm long, and 1000mm wide, and the middle right position of the operating platform 44 is circularly hollowed out to facilitate the fixing and placement of the leaching column 2. The guardrail 41, the staircase 42, the tripod 43 and the operating platform 44 are detachably connected by connecting bolts, which is convenient for disassembly and transportation.

[0032] Working principle: When using the variable flow leaching integrated device, the two needle valves 11 and the flow meter 12 are used in coordination to accurately control the output liquid flow rate, which can simulate the leaching of fillers under different rainfall intensities. The PH monitor 20 is installed in the liquid preparation and collection area 1 to facilitate the observation of the PH value of simulated acid rain. The metering pump 13 distributes water through the nozzle, and a water distribution trough 3 is set in the upper section of the leaching tower to further evenly distribute water and prevent wall flow during the leaching process. At the same time, the leaching column is composed of several sections of columns, and the height of the leaching column can be freely controlled.

[0033] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0034] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A variable flow leaching integrated device, characterized in that: The invention comprises a liquid preparation and liquid collection area (1), a leaching column (2), a water distribution tank (3) and a support (4); the liquid preparation and liquid collection area (1) is divided into two parts, a left liquid preparation area and a right liquid collection area, by a partition (18) in the middle of a square tank body; an online pH monitor (20) is installed on the liquid preparation and liquid collection area (1); a water inlet valve (16) is installed at the water inlet end of the liquid preparation and liquid collection area of ​​the liquid preparation and liquid collection area (1); a liquid outlet valve (17) is installed at the water outlet end of the liquid collection area of ​​the liquid preparation and liquid collection area (1); the left liquid preparation area and the right liquid collection area of ​​the liquid preparation and liquid collection area (1) are connected via a switch valve (15); a stirrer (14) is arranged in the liquid collection area of ​​the liquid preparation and liquid collection area (1) to add reagents required for simulating acid rain. The liquid mixing column (2) is fully mixed, and the outer end of the agitator (14) located in the liquid collecting area of ​​the liquid preparation area (1) is electrically connected to the electric control cabinet (19), and the output end of the electric control cabinet (19) is electrically connected to the metering pump (13). The liquid preparation area (1) and the elution column (2) are connected through a connecting pipe, and a needle valve (11) and a flow meter (12) are installed on the connecting pipe between the liquid preparation area (1) and the elution column (2). The elution column (2) is composed of a plurality of cylinders. Flanges (23) are respectively welded to the bottom and the upper end of the cylinder of the elution column (2). The cylinder is fixedly connected by the flange (23). The first section of the cylinder of the elution column (2) is connected to the The end is connected to the inlet head (22), and the arc top opening of the inlet head (22) is connected to the water inlet pipe and fixed to the nozzle (21). A water distribution trough (3) is arranged on the upper part of the first section of the cylinder of the elution column (2), and a perforated disc (32) is opened at the bottom of the water distribution trough (3). The outer side of the top of the water distribution trough (3) is fixedly connected to the ring (33) by welding, and a water distribution layer (31) is placed on the perforated disc (32) of the water distribution trough (3). A visual window (24) is arranged on the cylinder of the elution column (2), and a circular ring bracket (29) is arranged on the outer side of the elution column (2). An inspection port (25) is arranged on the last section of the cylinder of the elution column (2), and the lower end of the last section of the cylinder is connected to the ring (33) by welding. The flange (23) is connected to the gate valve (26), the lower flange of the gate valve (26) is connected to the water outlet head (27), the water outlet valve (28) is installed at the arc top opening of the water outlet head (27), the bracket (4) comprises a guardrail (41), a staircase (42), a tripod (43), and an operating platform (44), the guardrail (41) is vertically arranged on the upper end of the tripod (43), the tripod (43) is made of a plurality of stainless steel materials connected and fixed by nuts, and the outside of the tripod (43) is provided with a staircase (42), the operating platform (44) is located above the tripod (43), and the bracket (4) places the leaching column (2) through the operating platform (44); The metering pump (13) accurately controls the output liquid flow rate through the coordinated use of two needle valves (11) and a flow meter (12), and the flow meter (12) has a measuring range of 0 to 60 L / h.

2. A variable flow leaching integrated device according to claim 1, characterized in that: The online pH monitor (20) installed in the liquid preparation and collection area (1) is of model SIN-PH160, and the online pH monitor (20) is electrically connected to the display terminal.

3. The variable flow leaching integrated device according to claim 1, characterized in that: The metering pump (13), the stirrer (14), and the online pH monitor (20) are all electrically connected to the electric control cabinet (19).

4. The variable flow leaching integrated device according to claim 1, characterized in that: The leaching column (2) is composed of a plurality of cylinders which are connected in an assembled manner.

5. The variable flow leaching integrated device according to claim 1, characterized in that: Each cylinder of the leaching column (2) is provided with a visual window (24), and an inspection port (25) is provided on the last cylinder of the leaching column (2).

6. The variable flow leaching integrated device according to claim 1, characterized in that: Each section of the leaching column (2) made of anti-corrosion material has a cylinder height of 50 cm to 200 cm, an inner radius of 10 to 50 cm, a wall thickness of 2 to 3 cm, and an overall height of 50 cm to 600 cm.

7. The variable flow leaching integrated device according to claim 1, characterized in that: The left liquid dispensing area and the right liquid collecting area of ​​the liquid dispensing and collecting area (1) are connected or disconnected by a switch valve (15); the water dispensing tank (3) is sealed with a perforated disc (32), and the perforated disc (32) has water-permeable holes with a diameter of 2 mm, arranged horizontally and vertically, and the water dispensing layer (31) is composed of quartz sand with a layer height of 10 cm.

8. The variable flow leaching integrated device according to claim 1, characterized in that: The wall thickness of the circular ring (33) welded on the upper end of the water distribution trough (3) is 1 cm.

9. The variable flow leaching integrated device according to claim 1, characterized in that: The circular bracket (29) is located above the middle section of the cylinder, and six tripods (43) are welded to the circular bracket (29); the bracket (4) is made of stainless steel, the surface is spray-painted for corrosion resistance, the total length is 1500 mm, the total height is 2300 mm, and the total width is 1000 mm; the guardrail (41) is 1500 mm long and 1000 mm high, the staircase (42) is 600 mm wide, 2200 mm high, 1500 mm long and 1000 mm wide, and the operating platform (44) is hollowed out in a circular shape at the middle right position; the guardrail (41), the staircase (42), the tripod (43) and the operating platform (44) are detachably connected by connecting bolts.

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