CN112978977A

CN112978977A - Elution wastewater treatment device after organo-chlorine pesticide contaminated soil synergism elution restoration

Info

Publication number: CN112978977A
Application number: CN202110117024.5A
Authority: CN
Inventors: 邓绍坡; 周艳; 姜登登; 李旭伟; 赵远超; 王祥; 靳德成
Original assignee: Nanjing Institute of Environmental Sciences MEE
Current assignee: Nanjing Institute of Environmental Sciences MEE
Priority date: 2021-01-28
Filing date: 2021-01-28
Publication date: 2021-06-18
Anticipated expiration: 2041-01-28
Also published as: CN112978977B; JP2022115772A; JP6990347B1

Abstract

The invention discloses an elution wastewater treatment device after the synergistic elution remediation of organochlorine pesticide contaminated soil, which comprises a mud removal tank and a purification tank which are arranged side by side, wherein a mud removal module is arranged in the mud removal tank, the mud removal module comprises three groups of rotating shafts which are horizontally arranged and a tooth rake grating which rotates around the outer sides of the three groups of rotating shafts and is positioned on the second, the rake grating between the third rotating shafts is clamped by the rolling brushes vertically positioned on the two sides of the rake grating, so that the rake grating moving to the position gradually changes to be vertical to the first partition plate, the purification module is arranged in the purification tank and comprises a plurality of sections of zigzag infusion tubes and a filtering mechanism which is penetrated through the middle parts of the infusion tubes and fixedly sleeved with the infusion tubes.

Description

Elution wastewater treatment device after organo-chlorine pesticide contaminated soil synergism elution restoration

Technical Field

The invention relates to the technical field of organochlorine pesticide contaminated soil treatment, in particular to an elution wastewater treatment device after synergistic elution remediation of organochlorine pesticide contaminated soil.

Background

The organic chlorine pesticide has stable structure, high toxicity and difficult decomposition in soil, has natural degradation time of several years to dozens of years, and has long persistence, great pollution hazard, high risk to human health and ecology compared with common chemical polluted sites; at present, the technical and technological requirements for the remediation of organochlorine pesticide-polluted sites are high, the difficulty is high, the polluted soil in the sites becomes a chemical timed bomb which seriously threatens the human health and the environmental safety, and the problem of the soil environment which is urgently needed to be solved at present is solved. The synergistic chemical elution has obvious technical and economic advantages in the aspect of realizing the rapid and efficient remediation of the soil in the high-concentration and high-toxicity organochlorine polluted site. However, the problem of treatment and discharge of elution wastewater after elution restoration is a new problem which needs to be solved urgently.

According to preliminary estimation, the market for soil remediation and wastewater treatment in the coming years of China can reach billions of dollars, many foreign companies are seeking markets in China, foreign technologies and equipment introduction have the problems of high cost and high cost, and the practical feasibility of the foreign prior art applied in China needs to be verified through engineering practice because the national conditions of the national remediation of polluted sites are different (such as the types of pollutants polluted by the sites, the pollution intensity and the like are greatly different from those of foreign sites), so that the research and development of remediation technologies and equipment with independent intellectual property rights in China are accelerated, and the method is very urgent to meet the market demand for site remediation in China and improve the technical level of the national soil remediation and wastewater treatment.

Patent CN204529540U discloses a methane chloride organochlorine effluent disposal system, including sewage reation kettle, its feed end pours into sulphuric acid, hydrogen peroxide solution and waste water into and carries out the motor stirring, introduces it into the reaction wastewater disposal basin after the reaction finishes to carry out secondary treatment through the swash plate settler to waste water, prevent that it from causing secondary pollution. The methane chloride organochlorine wastewater is treated by a hydrogen peroxide catalytic oxidation-flocculation method, so that the organochlorine wastewater is discharged up to the standard, and secondary pollution is not generated after the hydrogen peroxide is used. But the treatment effect is stable and single, and the treatment effect on the elution wastewater containing multiple impurities and difficult to decompose is not high.

Therefore, need provide one kind and can carry out the device of effective processing to the elution waste water after the soil synergism elution restoration that organochlorine pesticide pollutes, prevent that elution waste water from taking place secondary pollution, properly handle harmful sludge and organochlorine pesticide residue in the elution waste water to can reach the standard of direct emission, avoid causing the pollution to the environment.

Disclosure of Invention

The invention provides an elution wastewater treatment device after the synergistic elution remediation of organochlorine pesticide contaminated soil, aiming at the existing problems.

The technical scheme of the invention is as follows:

the utility model provides an elution effluent treatment plant after organochlorine pesticide pollutes soil synergism elution restoration, includes: the sludge removing tank and the purifying tank are arranged side by side and are mutually connected through a connecting pipe,

the mud removing tank is internally provided with a mud removing module, the mud removing module is arranged on a first clapboard at the middle part in the mud removing tank in a penetrating way and comprises three groups of rotating shafts which are horizontally arranged and a toothed rake grating which rotates around the outer sides of the three groups of rotating shafts, wherein the first rotating shaft is positioned at the bottom of a water through tank below the first clapboard, the second rotating shaft and the third rotating shaft are respectively positioned at two sides above the first clapboard, the toothed rake grating positioned between the second rotating shaft and the third rotating shaft is clamped by rolling brushes which are vertically positioned at two sides of the toothed rake grating, so that the toothed rake grating moving to the position gradually changes into the shape vertical to the first clapboard, the lower part of the rolling brushes is connected with a first stirring paddle positioned in the water through a first rotating rod which penetrates through the first clapboard, the upper surface of the first clapboard is provided with a rotatable annular recycling tank in a sliding way, and the first clapboard positioned below the toothed rake grating at the position of the, a compression mechanism for pressing mud cakes is connected above the annular recovery groove and the straight recovery groove,

the purification tank is internally provided with a purification module, the purification module comprises a plurality of sections of zigzag infusion tubes and a filter mechanism, the fixed sleeves are arranged in the middle of the infusion tubes and vertically penetrated by the infusion tubes, one end of the infusion tubes is connected with the connecting tube, the other end of the infusion tubes is communicated with a purification tank below a second baffle plate in the middle of the purification tank, the filter mechanism comprises an outer shell fixedly connected with the infusion tubes and an inner rotary disc positioned in the outer shell and rotationally connected with the outer shell, the connecting part of the outer shell and each section of infusion tube is provided with a through hole, a plurality of groups of filter hole groups are circumferentially arranged on the inner rotary disc at equal intervals, each group of filter hole groups is the same as the through hole in size, each group of filter hole groups can vertically correspond to the through hole positioned on the same side through the rotation of the inner rotary disc, each group of filter hole group is internally provided with, the rotary disk block is driven to rotate by a rotating motor positioned in the rotary disk block.

Further, all be equipped with first tooth on the outside outer wall of annular accumulator and the inboard outer wall, first rotation pole outer wall with annular accumulator correspond the department be equipped with first tooth intermeshing's second tooth, the outer bottom surface of annular accumulator is equipped with the annular wheel, the annular wheel with the ring channel sliding connection that first baffle upper surface was equipped with, the rotation of annular accumulator is accomplished through the intermeshing of tooth, and prevents through the setting of annular wheel and annular groove that annular accumulator from taking place the dislocation at the rotation in-process.

Further, straight recovery tank is the slope setting and its lower one end is for the end that is used for retrieving the waste material, makes the mud and the waste material of rake grid recovery can fall into and discharge.

Furthermore, a water suction pump is arranged on the connecting pipe, a water inlet and a water outlet are respectively arranged at two ends of the water through groove, and the water outlet is connected with the connecting pipe to complete continuous and uninterrupted wastewater treatment.

Further, compressing mechanism establishes including being located annular accumulator and straight recovery tank end blade wheel and the cover that is used for striking off the waste material respectively two sets of keep away from the feed back groove of desilt module one side on the blade takes turns to, and the equidistant four blade groups that are equipped with of blade wheel, bottom and lateral wall all are equipped with the fluting that is used for making the blade to rotate in the feed back groove, and feed back groove rear end outer wall is equipped with the push rod motor, the output of push rod motor is connected with the clamp plate through the telescopic link that runs through the feed back groove outer wall, clamp plate and feed back groove sliding connection, clamp plate upper portion are equipped with the roof, and the feed back groove front end is equipped with movable baffle, can carry out compression treatment to mud and waste material, saves and places the space and arranges unnecessary moisture away.

Furthermore, the adjustable fender slides through the driving motor drive that is located first baffle upper surface, and two sets of blade wheels all rotate through the blade wheel motor drive that is located first baffle upper surface between the two in step, the bottom that feed back groove front end is close to adjustable fender department is equipped with a plurality of drainage holes, and the first baffle upper surface of drainage hole below is equipped with the wastewater disposal basin, clamp plate upper portion is equipped with the lug, the roof bottom is equipped with the spring groove, the lug with spring coupling that the spring inslot was equipped with can slide in the spring groove, can all compress the recovery to mud and waste material of different volume sizes.

Furthermore, be equipped with on the outer wall that the purification tank corresponds second baffle below and throw the medicine mouth, make waste water treatment more thorough through putting into medicine cooperation second stirring rake.

Further, the filtration pore group divide into and is close to the inboard interior filtration pore of crossing of inner rotary disk and the outer filtration pore of crossing that is close to the inner rotary disk outside, and interior filtration pore and outer filtration pore are equipped with the spout that extends to the inner rotary disk outside between crossing, and the filter screen that is equipped with on interior filtration pore and the outer filtration pore is connected through a set of dead lever, further retrieves the waste water that obtains with the compression and avoids causing the pollution.

Furthermore, the filter screen rear end of outer filtration pore is equipped with bellied thread groove, and the filter screen front end of interior filtration pore is equipped with the fixture block with the inner rotary disk joint, and shell body outer wall one side is equipped with a set of opening that just is used for changing the filter screen with the inner rotary disk intercommunication, the change of more convenient filtration pore group.

Further, shell body lower part center department is connected with the second stirring rake that is located the purification inslot through the second dwang that runs through the second baffle, and the shell body upper surface is equipped with and is used for making connecting rod pivoted swivelling chute, can not receive the hindrance when making the connecting rod rotate.

The invention has the beneficial effects that:

(1) the elution wastewater treatment device can effectively treat elution wastewater after the synergistic elution and restoration of the organochlorine pesticide contaminated soil, and the treated wastewater reaches the standard of direct discharge by removing sludge and solid wastes and purifying and filtering medicines, and is reasonable in structure, convenient to operate, high in automation degree and beneficial to further popularization.

(2) The elution wastewater treatment device can effectively recycle sludge and solid wastes and press the sludge and the solid wastes into mud cakes through the compression mechanism, saves the placing space, simultaneously discharges redundant moisture, and is more favorable for recycling.

(3) According to the elution wastewater treatment device, the wastewater after impurity removal can be filtered through the filtering mechanism, and the wastewater can be filtered for multiple times through the multiple groups of filtering hole groups, so that the filtering effect is further improved, the filtering hole groups can be replaced at any time, and the filtering effect is prevented from being influenced by the blockage of the filtering hole groups.

Drawings

FIG. 1 is a schematic view of the overall structure of a sludge removing tank and a purification tank of the present invention;

FIG. 2 is a schematic view of the internal structure of the desilting tank of the present invention;

FIG. 3 is a schematic structural view of a desilting module of the present invention;

FIG. 4 is a schematic view of the transition structure from the horizontal section to the vertical section of the rake grid of the present invention;

FIG. 5 is a schematic view of the compression mechanism of the present invention;

FIG. 6 is a schematic view of the construction of the platen and top plate of the compression mechanism of the present invention;

FIG. 7 is a schematic view of the internal structure of the purification tank of the present invention;

FIG. 8 is a schematic view of the purification module of the present invention;

fig. 9 is a schematic view of the internal structure of the purification module of the present invention.

Wherein, 1-a mud removing tank, 11-a first clapboard, 111-an annular groove, 12-a rotating shaft, 121-a first rotating shaft, 122-a second rotating shaft, 123-a third rotating shaft, 13-a toothed harrow grating, 14-a water through groove, 15-a rolling brush, 16-an annular recycling groove, 161-a first tooth, 162-an annular wheel, 17-a straight recycling groove, 18-a first rotating rod, 181-a second tooth, 19-a first stirring paddle, 2-a purifying tank, 21-a liquid conveying pipe, 22-a second clapboard, 23-a purifying groove, 24-a rotating disc block, 25-a medicine feeding port, 26-a second rotating rod, 27-a second stirring paddle, a 3-a compressing mechanism, 31-a blade wheel, 311-a blade, 32-a recycling groove and 321-a groove, 33-push rod motor, 34-telescopic rod, 35-pressing plate, 351-lug, 36-top plate, 361-spring groove, 362-spring, 37-movable baffle, 38-water filtering hole, 39-waste water groove, 4-filtering mechanism, 41-outer shell, 411-opening, 412-rotating groove, 42-inner rotary disc, 421-sliding groove, 43-through hole, 44-filtering hole group, 441-inner filtering hole, 442-outer filtering hole, 45-filtering net, 451-thread groove, 452-clamping block, 46-connecting rod, 47-fixing rod and 5-connecting pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the terms "front, back", "left, and right" used in the embodiments of the present invention are only used for descriptive purposes, and are not to be construed as indicating or implying relative importance or implicitly indicating the location of the indicated technical features.

Example 1

As shown in fig. 1, an elution wastewater treatment device after the organo-chlorine pesticide contaminated soil is synergically eluted and repaired comprises: the sludge removing tank 1 and the purifying tank 2 are arranged side by side, the sludge removing tank 1 and the purifying tank 2 are connected with each other through a connecting pipe 5, and a water pump is arranged on the connecting pipe 5;

as shown in fig. 2-4, the two ends of the water trough 14 are respectively provided with a water inlet and a water outlet, the water outlet is connected with the connecting pipe 5, the inside of the mud removing tank 1 is provided with a mud removing module, the mud removing module penetrates through the first partition plate 11 arranged in the middle of the mud removing tank 1, the mud removing module comprises three groups of horizontally arranged rotating shafts 12 and a rake rack 13 rotating around the outer sides of the three groups of rotating shafts 12, the rake rack 13 is a commercially available GSHP140cm rake-shaped rack, the shape and structure of the rake rack are adjusted, the rake rack is gradually changed into a vertical section in the horizontal section by changing the directions of the two sides of the rake rack, so as to adapt to the device, wherein the first rotating shaft 121 is positioned at the bottom of the water trough 14 below the first partition plate 11, the second rotating shaft 122 and the third rotating shaft 123 are respectively positioned at the two sides above the first partition plate 11, the rake rack 13 positioned between the second rotating shaft 122 and the third rotating shaft 123 is clamped by the rolling brushes 15 vertically positioned at the two, the lower part of the rolling brush 15 is connected with a first stirring paddle 19 positioned in a water through groove 14 through a first rotating rod 18 penetrating through a first partition plate 11, the upper surface of the first partition plate 11 is provided with a rotatable annular recovery groove 16 in a sliding manner, the outer side wall and the inner side wall of the annular recovery groove 16 are both provided with first teeth 161, the outer wall of the first rotating rod 18 corresponding to the annular recovery groove 16 is provided with second teeth 181 meshed with the first teeth 161, the outer bottom surface of the annular recovery groove 16 is provided with an annular wheel 162, the annular wheel 162 is in sliding connection with an annular groove 111 arranged on the upper surface of the first partition plate 11, the first partition plate 11 positioned below a toothed rake grating 13 at a second rotating shaft 122 is provided with a straight recovery groove 17, the straight recovery groove 17 is obliquely arranged, the lower end of the straight recovery groove is used for recovering waste materials, and a compression mechanism 3 used for pressing mud cakes is connected above the annular recovery groove 16 and the straight recovery groove 17;

as shown in fig. 3-6, the compressing mechanism 3 includes a vane wheel 31 respectively located in the annular recycling groove 16 and the end of the straight recycling groove 17 for scraping waste material, and a material returning groove 32 sleeved on one side of the two sets of vane wheels 31 far from the mud removing module, four sets of vanes 311 are equidistantly arranged on the vane wheel 31, slots 321 for allowing the vanes 311 to rotate are respectively arranged on the bottom and the side wall of the material returning groove 32, a push rod motor 33 is arranged on the outer wall of the rear end of the material returning groove 32, the push rod motor 33 is a commercially available electric push rod, the output end of the push rod motor 33 is connected with a pressing plate 35 through an expansion link 34 penetrating through the outer wall of the material returning groove 32, the pressing plate 35 is connected with the material returning groove 32 in a sliding manner, a top plate 36 is arranged on the upper portion of the pressing plate 35, a movable baffle 37 is arranged at the front end of the material returning groove 32, the movable baffle 37 is driven to slide by a driving motor located on the upper surface of The movable vane wheel motor is a commercial double-head direct current motor, the bottom of the front end of the feed back groove 32, which is close to the movable baffle 37, is provided with a plurality of water filtering holes 38, the upper surface of the first partition plate 11 below the water filtering holes 38 is provided with a waste water groove 39, the upper part of the pressing plate 35 is provided with a convex block 351, the bottom of the top plate 36 is provided with a spring groove 361, and the convex block 351 is connected with a spring 362 arranged in the spring groove 361 and can slide in the spring groove 361;

as shown in fig. 7-9, a purification module is disposed inside the purification tank 2, the purification module comprises a plurality of segments of folded infusion tubes 21 and a filtering mechanism 4 fixedly sleeved in the middle of the infusion tube 21 and vertically penetrated by the infusion tube 21, one end of the infusion tube 21 is connected with a connecting tube 5, the other end of the infusion tube 21 is communicated with a purification tank 23 below a second partition 22 in the middle of the purification tank 2, the purification tank 2 is provided with a drug feeding port 25 on the outer wall corresponding to the lower part of the second partition 22, the filtering mechanism 4 comprises an outer shell 41 fixedly connected with the infusion tube 21 and an inner rotary disk 42 positioned inside the outer shell 41 and rotatably connected with the outer shell 41, the joint of the outer shell 41 and each segment of the infusion tubes 21 is provided with through holes 43, the through holes 43 are totally provided with 4 groups, 8 groups of filtering hole groups 44 are circumferentially arranged on the inner rotary disk 42 at equal intervals, each group of filtering hole groups 44 has the same size as the through holes 43, each group of filtering, the filter hole group 44 is divided into an inner filter hole 441 close to the inner side of the inner rotary disk 42 and an outer filter hole 442 close to the outer side of the inner rotary disk 42, a sliding groove 421 extending to the outer side of the inner rotary disk 42 is arranged between the inner filter hole 441 and the outer filter hole 442, a raised thread groove 451 is arranged at the rear end of the filter screen 45 of the outer filter hole 442, a clamping block 452 clamped with the inner rotary disk 42 is arranged at the front end of the filter screen 45 of the inner filter hole 441, one group of openings 411 communicated with the inner rotary disk 42 and used for replacing the filter screen 45 are arranged at one side of the outer wall of the outer shell 41, the filter screens 45 arranged on the inner filter hole 441 and the outer filter hole 442 are connected through a group of fixing rods 47, a detachable filter screen 45 is arranged in each group of filter holes 44, the filter screen 45 is a commercially available high-quality stainless steel filter screen, the shape structure of the filter screen is adjusted to the, the turntable block 24 is driven to rotate by a rotating motor inside the turntable block, the rotating motor is a commercially available industrial gear reduction motor, the center of the lower part of the outer shell 41 is connected with a second stirring paddle 27 inside the purifying tank 23 through a second rotating rod 26 penetrating through the second partition plate 22, and the upper surface of the outer shell 41 is provided with a rotating groove 412 for rotating the connecting rod 46.

The working principle of applying the elution wastewater treatment device after the organic chlorine pesticide contaminated soil synergistic elution restoration to perform wastewater treatment is as follows:

injecting elution wastewater obtained after elution and remediation of the polluted soil containing DDT into a desilting tank 1 from a water inlet, and performing sludge removal and solid waste treatment by a sludge removal module;

the working principle of the desilting module is as follows:

after the wastewater is subjected to secondary desilting through the tooth rake grids 13 between the first rotating shaft 121 and the third rotating shaft 123 and between the first rotating shaft 121 and the second rotating shaft 122, most of the sludge and solid waste are extruded and discharged when passing through the second rotating shaft 122, and fall into the straight recovery tank 17, and when a small part of the attached sludge and solid waste continue to move forward along with the rake grating 13 to the position of the rolling brush 15, the friction force between the toothed harrow grating 13 and the rolling brush 15 and the mutual movement scrape the small part of the attached sludge and solid waste of the toothed harrow grating 13 and fall into an annular recovery tank 16, meanwhile, the rolling brush 15 drives the first rotating rod 18 to rotate when rolling, thereby driving the first stirring paddle 19 to rotate, the waste water in the water passing tank is stirred to be fully mixed with the tooth rake grating 13, the removal efficiency is improved, and the second tooth 181 on the first rotating rod 18 is meshed with the first tooth 161 on the annular recovery tank 16 to rotate the annular recovery tank 16.

The operating principle of the compression mechanism 3 is as follows:

the straight recovery tank 17 conveys the collected sludge and solid waste to the bottom vane wheel 31 under the action of gravity, the annular recovery tank 16 conveys the collected sludge and solid waste to the vane wheel 31 in the rotation process, the vane wheel motor is started to drive the two sets of vane wheels 31 to synchronously rotate, the sludge and solid waste are transferred into the return trough, the vanes on the two sides of the sludge and solid waste are respectively attached to the slots 321 on the bottom and the side of the return trough, the push rod motor 33 is started to control the telescopic rod 34 to move along the return trough 32, the pressing plate 35 pushes the sludge and solid waste accumulated in the slots 321 to the movable baffle 37 at the tail end of the return trough 32 and extrudes the sludge and solid waste, meanwhile, the lug 351 extrudes the spring 362 to enable the lug 351 to move in the spring groove 361 until the sludge and solid waste are extruded into a mud cake, and the moisture in the mud and solid waste is discharged into the waste water tank 39 through the water filtering holes 38, the driving motor is started to push the movable baffle 37 to the outside, and then the pressing plate 35 is pushed to the tail end of the feed-back groove 32 through the telescopic rod 34 to discharge and uniformly recover the pressed mud cakes.

The wastewater after the sludge removal is pressurized by a water pump from a water outlet of the sludge removal tank 1, pumped by a connecting pipe and conveyed into a purification tank 2;

the working principle of the purification module is as follows:

after the wastewater enters the infusion tube 21, the wastewater is filtered by the filtering mechanism 4, the filtered wastewater is discharged into the purifying tank 23, then the motor for controlling the rotation of the second rotating rod 26 is started to drive the second stirring paddle 27 to rotate and stir, and the purifying agent is put into the dosing port 25 for purification for 24 hours.

The working principle of the filtering mechanism 4 is as follows:

when wastewater enters the filter hole groups 44 in the through holes 43 through the infusion tube 21, the wastewater is filtered through the filter screen 45, then the wastewater is sequentially filtered through the other three sections of infusion tubes 21 to complete filtering, and then the rotating motor is started during filtering to drive the rotating disc block 24 to rotate and drive the connecting rod 46 to rotate in the rotating groove 412, so that the inner rotating disc 42 rotates in the outer shell 41 to switch different filter hole groups 44, and the wastewater stops when the next filter hole group 44 moves to a position corresponding to the through holes 43, so that the same filter hole group 44 is prevented from being blocked when the filtering time is too long and rotates once every 3 min; if it needs it to change filter screen 45 on filtering hole group 44, use special sampler to go deep into in thread groove 451 by opening 411 department, special sampler is the long round bar that the end department was equipped with the screw thread, it can with thread groove 451 cooperation after the rotation with two sets of filter screens 45 that the internal fixation pole 47 of filtering hole group 44 is connected take out the change, put into new filter screen 45 when likewise, use sampler to put into filtering hole group 44 by opening 411 with two sets of filter screens 45 that the fixation pole 47 is connected, fixture block 452 and inner rotary disk 42 block are fixed, the reverse rotation sampler breaks away from with thread groove 451 and takes out.

Example 2

This embodiment is substantially the same as embodiment 1 except that: the number of sets of filter openings 44 is different.

Wherein, 12 groups of filtering hole groups 44 are arranged on the inner rotary disk 42 at equal intervals in the circumferential direction.

Example 3

Wherein, inner rotating disk 42 is provided with 4 groups of filter hole groups 44 at equal intervals in the circumferential direction.

Example 4

This embodiment is substantially the same as embodiment 1 except that: the components of the pollutants eluted from the polluted soil are different,

injecting elution wastewater containing HCH after the polluted soil is eluted and repaired into a desilting tank 1 from a water inlet, performing sludge removal and solid waste treatment through a sludge removal module, pressurizing the wastewater subjected to sludge removal through a water outlet of the desilting tank 1 through a water pump, pumping the wastewater through a connecting pipe, conveying the wastewater into a purification tank 2, and performing filtration and purification treatment;

examples of the experiments

The harmful substance component detection was carried out for the above four groups of examples, and the detection standard (method) was gas chromatography GB/T14550-2003 based on hexachloro cyclohexane and dichlorodiphenyl trichloroethane in soil, and the detection results are shown in the following table:

TABLE 1 detection results of harmful substance components in wastewater

It can be seen that the contents of DDT and HCH in the treated wastewater are both greatly reduced, and the elution wastewater treatment apparatus after the synergistic elution remediation of the organochlorine pesticide-contaminated soil of the invention can effectively treat the wastewater containing organochlorine pesticide, wherein the decrease of the DDT content in the treated wastewater in the embodiment 1 is most obvious, and the decrease of the DDT content in the treated wastewater in the embodiment 3 is less, which may be caused by the fact that the harmful substances in the wastewater cannot be effectively filtered due to the small number of the filtering hole groups 44; in contrast, in example 2, the DDT content in the treated wastewater was similar to that in example 1, but the use of a large number of filter hole groups 44 inevitably increased the production cost, and the frequency of failure during use was likely to increase due to the excessive number of filter hole groups 44, and therefore, the number of filter hole groups 44 selected in example 1 was most appropriate for 8 groups.

Claims

1. The utility model provides an organic chlorine pesticide pollutes elution effluent treatment plant after soil synergism elution restoration which characterized in that includes: the sludge removing tank (1) and the purifying tank (2) are arranged side by side, the sludge removing tank (1) and the purifying tank (2) are connected with each other through a connecting pipe (5),

the mud removing tank (1) is internally provided with a mud removing module, the mud removing module is arranged on a first partition plate (11) in the middle of the mud removing tank (1) in a penetrating way and comprises three groups of horizontally arranged rotating shafts (12) and three groups of rotating shaft (12) outer side rotating rake grids (13), wherein the first rotating shaft (121) is positioned at the bottom of a water trough (14) below the first partition plate (11), the second rotating shaft (122) and the third rotating shaft (123) are respectively positioned at two sides above the first partition plate (11), the rake grids (13) between the second rotating shaft and the third rotating shaft (122) and the third rotating shaft (123) are clamped by rolling brushes (15) vertically positioned at two sides of the rake grids, the rake grids (13) moving to the position gradually change into the first partition plate (11) vertical to the rotating rod, the lower part of the rolling brushes (15) is connected with a first stirring paddle (19) positioned in the water trough (14) through the first rotating rod (18) penetrating through the first partition plate (11), the upper surface of the first clapboard (11) is provided with a rotatable annular recovery groove (16) in a sliding way, the first clapboard (11) which is positioned below the rake grating (13) at the second rotating shaft (122) is provided with a straight recovery groove (17), a compression mechanism (3) for pressing mud cakes is connected and arranged above the annular recovery groove (16) and the straight recovery groove (17),

the inside purification module that is equipped with of purification jar (2), purification module includes infusion tube (21) and the fixed cover of a plurality of sections inflection types and locates infusion tube (21) middle part and by filter mechanism (4) that infusion tube (21) run through perpendicularly, infusion tube (21) one end with connecting pipe (5) are connected, and purification groove (23) intercommunication of middle part second baffle (22) below in the other end and purification jar (2), filter mechanism (4) include with infusion tube (21) fixed connection's shell body (41) and be located shell body (41) inside and with shell body (41) rotation connection's inner rotating disc (42), shell body (41) all are equipped with through-hole (43) with the junction of each section infusion tube (21), a plurality of groups filter punch combination (44) have been seted up to the equidistant circumference on inner rotating disc (42), every group filter punch combination (44) all with through-hole (43) size is the same, every filter hole group (44) of group all can correspond to each other from top to bottom with through-hole (43) that lie in same one side through the rotation of inner rotating disc (42), all is equipped with detachable filter screen (45) in every filter hole group (44) of group, and inner rotating disc (42) are connected with carousel piece (24) that lie in the interior top surface of purifying tank (2) through two sets of connecting rods (46), carousel piece (24) are rotated by the rotation motor drive that lies in its inside.

2. The device for treating the elution wastewater after the synergistic elution and restoration of the organochlorine pesticide-polluted soil according to claim 1, wherein first teeth (161) are arranged on both the outer wall and the inner wall of the annular recovery groove (16), second teeth (181) meshed with the first teeth (161) are arranged at the positions, corresponding to the annular recovery groove (16), of the outer wall of the first rotating rod (18), an annular wheel (162) is arranged on the outer bottom surface of the annular recovery groove (16), and the annular wheel (162) is in sliding connection with an annular groove (111) formed in the upper surface of the first partition plate (11).

3. The device for treating elution wastewater after the synergistic elution and remediation of organochlorine pesticide-contaminated soil as claimed in claim 1, wherein the straight recovery tank (17) is inclined and the lower end thereof is a tail end for recovering waste materials.

4. The device for treating elution wastewater after the synergistic elution and remediation of organochlorine pesticide-contaminated soil according to claim 1, wherein a water suction pump is arranged on the connecting pipe (5), a water inlet and a water outlet are respectively arranged at two ends of the water trough (14), and the water outlet is connected with the connecting pipe (5).

5. The device for treating the elution wastewater after the synergistic elution and restoration of the organochlorine pesticide-polluted soil, according to claim 1, wherein the compression mechanism (3) comprises blade wheels (31) which are respectively positioned in the annular recovery groove (16) and at the tail end of the straight recovery groove (17) and used for scraping the waste materials, and a feed-back groove (32) which is sleeved on two groups of the blade wheels (31) and is far away from one side of the desilting module, four groups of blades (311) are arranged on the blade wheels (31) at equal intervals, slots (321) which are used for enabling the blades (311) to rotate are respectively arranged at the bottom and the side walls in the feed-back groove (32), a push rod motor (33) is arranged on the outer wall of the rear end of the feed-back groove (32), the output end of the push rod motor (33) is connected with a pressing plate (35) through a telescopic rod (34) which penetrates through the outer wall of the feed-, the upper part of the pressure plate (35) is provided with a top plate (36), and the front end of the feed back groove (32) is provided with a movable baffle (37).

6. The elution wastewater treatment device after the organo-chlorine pesticide contaminated soil synergism elution restoration according to claim 5, it is characterized in that the movable baffle (37) is driven to slide by a driving motor positioned on the upper surface of the first partition plate (11), two groups of blade wheels (31) are driven to synchronously rotate by the blade wheel motor positioned on the upper surface of the first partition plate (11) between the two groups of blade wheels, a plurality of water filtering holes (38) are arranged at the bottom of the front end of the feed back tank (32) close to the movable baffle (37), a waste water tank (39) is arranged on the upper surface of the first clapboard (11) below the water filtering holes (38), a convex block (351) is arranged at the upper part of the pressure plate (35), a spring groove (361) is arranged at the bottom of the top plate (36), the projection (351) is connected with a spring (362) arranged in the spring groove (361) and can slide in the spring groove (361).

7. The device for treating elution wastewater after the synergistic elution and restoration of the organochlorine pesticide-contaminated soil according to claim 1, wherein a drug feeding port (25) is formed in the outer wall of the purification tank (2) corresponding to the lower part of the second partition plate (22).

8. The device for treating elution wastewater after the synergistic elution restoration of the organochlorine pesticide-contaminated soil as claimed in claim 1, wherein the filtering hole group (44) is divided into an inner filtering hole (441) near the inner side of the inner rotary disk (42) and an outer filtering hole (442) near the outer side of the inner rotary disk (42), a chute (421) extending to the outer side of the inner rotary disk (42) is arranged between the inner filtering hole (441) and the outer filtering hole (442), and the filtering nets (45) arranged on the inner filtering hole (441) and the outer filtering hole (442) are connected through a set of fixing rods (47).

9. The device for treating the elution wastewater after the synergistic elution and restoration of the organochlorine pesticide-contaminated soil as claimed in claim 8, wherein a raised thread groove (451) is formed in the rear end of the filter screen (45) of the outer filter hole (442), a clamping block (452) clamped with the inner rotary disc (42) is formed in the front end of the filter screen (45) of the inner filter hole (441), and a group of openings (411) communicated with the inner rotary disc (42) and used for replacing the filter screen (45) are formed in one side of the outer wall of the outer shell (41).

10. The device for treating elution wastewater after the synergistic elution remediation of organochlorine pesticide-contaminated soil according to claim 1, wherein the center of the lower part of the outer shell (41) is connected to a second stirring paddle (27) located in the purification tank (23) through a second rotating rod (26) penetrating through the second partition plate (22), and the upper surface of the outer shell (41) is provided with a rotating groove (412) for rotating the connecting rod (46).