Novel pollutant treatment device

Abstract

The utility model relates to the technical field of polluted soil purification, and discloses a novel pollutant treatment device which comprises a soil screening assembly used for removing large-particle gravel in polluted soil. The soil purification assembly is used for purifying the soil screened and filtered by the soil screening assembly; and the waste liquid treatment assembly is used for treating waste liquid generated in the soil screening and purifying process. Through the stirring effect of the soil crushing device and the first stirring tank, large-particle substances in polluted soil are crushed and are fully mixed with a mixed solution, so that uniform dispersion of pollutants is promoted, and subsequent purification treatment is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of contaminated soil purification, in particular to a novel pollutant treatment device. Background Art

[0002] With the continuous and rapid development of industrialization and urbanization, a large number of industrial enterprises have been closed, transferred and relocated, leaving behind a large number of heavily polluted soil areas and high-risk areas. The abandoned polluted sites not only endanger the health of people in the surrounding areas, but also affect the process of urbanization construction, and have become a major environmental issue restricting the sustainable development of regional social economy.

[0003] At present, the main soil remediation methods at home and abroad include physical remediation, chemical remediation and biological remediation, but some methods have shortcomings such as high cost, incomplete remediation, long remediation cycle, and great impact of environmental conditions, making them difficult to be widely used. Soil leaching remediation technology is a fast and efficient chemical leaching technology. Soil leaching remediation technology uses soil purification equipment to transfer pollutants in the soil from the soil phase to the liquid phase through physical separation or chemical extraction. The current soil purification equipment has a complex structure, high cost, and does not consider the disposal of waste liquid.

[0004] Therefore, it is necessary to design a new type of pollutant treatment device to solve the above problems. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a new type of pollutant treatment device.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A novel pollutant treatment device includes a soil screening component, wherein the soil screening component is used to remove large particles of sand and gravel in contaminated soil;

[0008] A soil purification component, the soil purification component is used to purify the soil screened by the soil screening component;

[0009] A waste liquid treatment component is used to treat waste liquid generated during soil screening and purification.

[0010] As a preferred technical solution of the utility model, the soil screening assembly includes a soil storage tank, a first conveying device, a first stirring tank, a clean water tank, a second conveying device, a vibrating screen and a mixed liquid collecting device, the input end of the first conveying device is connected to the soil storage tank, the output end of the first conveying device is aligned with the feed port position of the first stirring tank, the input end of the second conveying device is connected to the discharge end of the first stirring tank, the output end of the second conveying device is aligned with the vibrating screen, and the mixed liquid collecting device is located below the vibrating screen.

[0011] As a preferred technical solution of the utility model, the soil purification component includes a third conveying device, a second stirring tank, a purification agent delivery system, a fourth conveying device, a sludge concentrating device, a sand settling device, a fifth conveying device and a filter press, the input end of the third conveying device is connected to the discharge end of the vibrating screen, the output end of the third conveying device is aligned with the feed port of the second stirring tank, the purification agent delivery system is connected to the second stirring tank, the input end of the fourth conveying device is connected to the discharge end of the second stirring tank, the output end of the fourth conveying device is connected to the sludge concentrating device, the sludge concentrating device is connected to the sand settling device, the input end of the fifth conveying device is connected to the sludge concentrating device and the sand settling device, and the output end of the fifth conveying device is connected to the filter press.

[0012] As a preferred technical solution of the utility model, the waste liquid treatment component includes a first reagent tank, a second reagent tank, a third reagent tank, a fourth reagent tank, a first reaction tank, a second reaction tank, a pH adjustment tank, a plate and frame filter press, a flushing pipe and a water storage tank. The first reagent tank and the second reagent tank are connected to the first reaction tank, the third reagent tank is connected to the second reaction tank, and the fourth reagent tank is connected to the pH adjustment tank. The bottoms of the first reaction tank and the second reaction tank are provided with slag discharge ports, the first reaction tank and the second reaction tank are connected to the plate and frame filter press through the slag discharge port, the water storage tank is connected to the plate and frame filter press through a flushing pipe, and a reflux device is installed on the flushing pipe.

[0013] The utility model has the following beneficial effects:

[0014] 1. Soil crushing and stirring: Through the stirring action of the soil crushing device and the first stirring tank, the large particles in the contaminated soil are crushed and fully mixed with the mixed solution, which promotes the uniform dispersion of pollutants and is beneficial to the subsequent purification treatment;

[0015] 2. Screening and sand removal: The muddy soil is transported to the vibrating screen through the second conveying device, and then the sand is removed through the sand settling device, which can effectively screen and remove large particles of sand and small particles of soil in the soil, thereby improving the soil purification effect;

[0016] 3. Application of sprinkler: The sprinkler is connected to the clean water tank and sprays high-pressure water to improve the stirring efficiency of the soil, make the mixed solution more uniform, help promote the dissolution and reaction of pollutants, and further improve the purification effect;

[0017] 4. Chemical dosing system: flocculants and coagulants are added through the first chemical tank, the second chemical tank and the third chemical tank. The chemical system can have a good removal effect on pollutants and effectively promote soil purification and solidification of pollutants;

[0018] 5. Wastewater treatment and recycling: The sediment in the wastewater is pressed by the filter press to form a cake-like body, realizing solid-liquid separation and reducing wastewater discharge. The setting of flushing pipes and reflux devices can realize the flushing of the filter press and waste liquid recovery, reducing resource waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural schematic diagram of a new type of pollutant treatment device proposed by the utility model.

[0020] In the figure: soil storage tank 1, first conveying device 2, first stirring tank 3, clean water tank 4, second conveying device 5, vibrating screen 6, mixed liquid collecting device 7, third conveying device 8, second stirring tank 9, purification agent delivery system 10, fourth conveying device 11, sludge concentration device 12, sand settling device 13, fifth conveying device 14, filter press 15, first agent tank 16, second agent tank 17, third agent tank 18, fourth agent tank 19, first reaction tank 20, second reaction tank 21, pH adjustment tank 22, plate and frame filter press 23, flushing pipeline 24, water storage tank 25. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] Reference Figure 1 , a novel pollutant treatment device, comprising a soil screening component, the soil screening component is used to remove large particles of sand and gravel in the contaminated soil;

[0023] A soil purification component, the soil purification component is used to purify the soil screened by the soil screening component;

[0024] Waste liquid treatment component, the waste liquid treatment component is used to treat the waste liquid generated during soil screening and purification.

[0025] Reference Figure 1The soil screening assembly includes a soil storage tank 1, a first conveying device 2, a first stirring tank 3, a clean water tank 4, a second conveying device 5, a vibrating screen 6 and a mixed liquid collecting device 7. The input end of the first conveying device 2 is connected to the soil storage tank 1, the output end of the first conveying device 2 is aligned with the feed port position of the first stirring tank 3, the input end of the second conveying device 5 is connected to the discharge end of the first stirring tank 3, the output end of the second conveying device 5 is aligned with the vibrating screen 6, and the mixed liquid collecting device 7 is located below the vibrating screen 6.

[0026] Reference Figure 1 The soil purification component includes a third conveying device 8, a second stirring tank 9, a purification agent delivery system 10, a fourth conveying device 11, a sludge concentrating device 12, a sand settling device 13, a fifth conveying device 14 and a filter press 15. The input end of the third conveying device 8 is connected to the discharge end of the vibrating screen 6, and the output end of the third conveying device 8 is aligned with the feed port of the second stirring tank 9. The purification agent delivery system 10 is connected to the second stirring tank 9. The input end of the fourth conveying device 11 is connected to the discharge end of the second stirring tank 9, and the output end of the fourth conveying device 11 is connected to the sludge concentrating device 12. The sludge concentrating device 12 is connected to the sand settling device 13. The input end of the fifth conveying device 14 is connected to the sludge concentrating device 12 and the sand settling device 13, and the output end of the fifth conveying device 14 is connected to the filter press 15.

[0027] Reference Figure 1 The waste liquid treatment component includes a first reagent tank 16, a second reagent tank 17, a third reagent tank 18, a fourth reagent tank 19, a first reaction tank 20, a second reaction tank 21, a pH regulating tank 22, a plate and frame filter press 23, a flushing pipe 24 and a water storage tank 25. The first reagent tank 16 and the second reagent tank 17 are connected to the first reaction tank 20, the third reagent tank 18 is connected to the second reaction tank 21, and the fourth reagent tank 19 is connected to the pH regulating tank 22. The bottoms of the first reaction tank 20 and the second reaction tank 21 are provided with a slag discharge port, the first reaction tank 20 and the second reaction tank 21 are connected to the plate and frame filter press 23 through the slag discharge port, the water storage tank 25 is connected to the plate and frame filter press 23 through the flushing pipe 24, and a reflux device is installed on the flushing pipe 24.

[0028] The specific working principle of the utility model is as follows:

[0029] After the contaminated soil is dug out from the contaminated site, it is first sent to a soil crushing device for crushing, and the large particles in the contaminated soil are crushed, and then sent to the first mixing tank 3 by the first conveying device 2. The first conveying device 2 is an engine and a conveyor belt, which can directly convey the crushed soil to the first mixing tank 3 for stirring and dispersion. The second conveying device 5 is a screw conveyor, which can convey the muddy soil to the vibrating screen 6 to further screen the large particles of sand and gravel, so as to achieve a good soil purification effect. A sprinkler is arranged above the first mixing tank 3 and is connected to the clean water tank 4. The sprinkler sprays high-pressure water flow, thereby improving the mixing efficiency of the soil. The mixed liquid collecting device 7 includes a flushing device and a mud collecting device. The flushing device is used to flush the large particles of sand and gravel after screening, and the mixed liquid collecting device 7 is used to collect the mixed solution after stirring;

[0030] The mixed solution after stirring is transported to the second stirring tank 9 through the third conveying device 8 for soil purification. The purification agent delivery system is connected to the second stirring tank 9. The agent is preferably oxalic acid, citric acid, EDTA, surfactant, etc., alone or in combination, which can achieve the best removal effect on pollutants in the soil. The mixed solution of the second stirring tank 9 is transported to the sludge concentration device 12 through the fourth conveying device 11. The mixed solution containing a small amount of soil in the upper layer after concentration is transported to the sand settling device 13 for sand removal to remove small particles of soil. The filter press 15 receives the soil from the sludge concentration device 12 and the sand settling device 13, and the soil purification is completed after compression;

[0031] The first reagent tank 16, the second reagent tank 17, and the third reagent tank 18 are used to add flocculants and coagulants, preferably PAC, NaOH, and PAM, wherein the first reagent tank 16 and the second reagent tank 17 are connected to the first reaction tank 20, and the third reagent tank 18 is connected to the second reaction tank 21. A slag discharge port is set at the bottom of the first reaction tank 16 and the second reaction tank 17. Since the pH of the treated wastewater may be too high or too low and does not meet the emission standards, a pH regulating tank 22 is set. The fourth reagent tank 19 is used to add pH adjusting agents and is connected to the pH regulating tank 22. The plate and frame filter press 23 is connected to the slag discharge port to press the precipitate into a cake-like body. The flushing pipe 24 connects the water storage tank 25 and the plate and frame filter press 23 to flush the plate and frame filter press 23, and a reflux device is installed to send the flushed waste liquid to the first reaction tank 20.

[0032] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A new type of pollutant treatment device, characterized in that: include: A soil screening assembly, the soil screening assembly is used to remove large particles of sand and gravel in contaminated soil; A soil purification component, the soil purification component is used to purify the soil screened by the soil screening component; A waste liquid treatment component, wherein the waste liquid treatment component is used to treat waste liquid generated during soil screening and purification; The waste liquid treatment component comprises a first reagent tank (16), a second reagent tank (17), a third reagent tank (18), a fourth reagent tank (19), a first reaction tank (20), a second reaction tank (21), a pH regulating tank (22), a plate-frame filter press (23), a flushing pipeline (24) and a water storage tank (25); the first reagent tank (16), the second reagent tank (17) are connected to the first reaction tank (20); the third reagent tank (18) is connected to the second reaction tank (21); the fourth reagent tank (19) is connected to the pH regulating tank (22); a slag discharge port is provided at the bottom of the first reaction tank (20) and the second reaction tank (21); the first reaction tank (20) and the second reaction tank (21) are connected to the plate-frame filter press (23) through the slag discharge port; the water storage tank (25) is connected to the plate-frame filter press (23) through the flushing pipeline (24); and a reflux device is installed on the flushing pipeline (24).

2. A novel pollutant treatment device according to claim 1, characterized in that: The soil screening assembly comprises a soil storage tank (1), a first conveying device (2), a first stirring tank (3), a clean water tank (4), a second conveying device (5), a vibrating screen (6) and a mixed liquid collecting device (7); the input end of the first conveying device (2) is connected to the soil storage tank (1); the output end of the first conveying device (2) is aligned with the feed inlet position of the first stirring tank (3); the input end of the second conveying device (5) is connected to the discharge end of the first stirring tank (3); the output end of the second conveying device (5) is aligned with the vibrating screen (6); and the mixed liquid collecting device (7) is located below the vibrating screen (6).

3. A novel pollutant treatment device according to claim 2, characterized in that: The soil purification component comprises a third conveying device (8), a second stirring tank (9), a purification agent delivery system (10), a fourth conveying device (11), a sludge concentration device (12), a sand settling device (13), a fifth conveying device (14) and a filter press (15); the input end of the third conveying device (8) is connected to the discharge end of the vibrating screen (6); the output end of the third conveying device (8) is aligned with the feed port of the second stirring tank (9); the purification agent delivery system (10) is connected to the second stirring tank (9); the input end of the fourth conveying device (11) is connected to the discharge end of the second stirring tank (9); the output end of the fourth conveying device (11) is connected to the sludge concentration device (12); the sludge concentration device (12) is connected to the sand settling device (13); the input end of the fifth conveying device (14) is connected to the sludge concentration device (12) and the sand settling device (13); the output end of the fifth conveying device (14) is connected to the filter press (15).

Images