CN212845370U - Contaminated soil restoration test device - Google Patents
Contaminated soil restoration test device Download PDFInfo
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- CN212845370U CN212845370U CN202021750073.XU CN202021750073U CN212845370U CN 212845370 U CN212845370 U CN 212845370U CN 202021750073 U CN202021750073 U CN 202021750073U CN 212845370 U CN212845370 U CN 212845370U
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Abstract
The utility model discloses a pollute soil restoration test device, including the agitator tank, seted up the discharge opening on the bottom inner wall of agitator tank, the equal fixedly connected with landing leg in bottom four corners of agitator tank, top one side intercommunication of agitator tank is fixed with repair liquid and advances the pipe, the rectangular channel has been seted up to the right side bottom of agitator tank, and rectangular channel and discharge opening cross intercommunication, sliding sleeve are equipped with L shape baffle in the rectangular channel, and the right side of L shape baffle extends to the agitator tank outside and fixedly connected with U-shaped handle. The utility model relates to a rationally, convenient to use is convenient for carry out broken filtration to knot block-shaped soil, and is convenient for to filter off the not complete broken caking soil of crossing and upwards get rid of to broken sword department and continue smashing, reaches to possess before mixing and carries out the function of lasting even breakage to soil, improves mixed effect to avoid satisfying the user demand because of mixing inhomogeneous influence the phenomenon of experimental result, be favorable to using.
Description
Technical Field
The utility model relates to a soil restoration technical field especially relates to a pollute soil restoration test device.
Background
The soil remediation is a technical measure for restoring the normal function of the polluted soil, and the soil remediation refers to transferring, absorbing, degrading and converting pollutants in the soil by using physical, chemical and biological methods to reduce the concentration of the pollutants to an acceptable level, and the soil remediation needs to be demonstrated through experiments; mixing the prepared repairing liquid with the polluted soil for reaction, and then detecting the repairing degree of the soil by personnel; current contaminated soil restoration test device utilizes the mixing box to stir soil and repair liquid more and mixes.
Present pollute soil restoration test device, its feed inlet department does not mostly possess carries out the function of lasting even breakage to the soil of caking, (soil agglomerates easily, great harder caking form soil directly gets into the mixing box and mixes with soil repair liquid, cause soil repair liquid and the inhomogeneous phenomenon of soil mixing easily), the mixed effect is relatively poor, and then the result inaccuracy that leads to the experiment, thereby the repair work of later stage soil has been influenced greatly, can not satisfy the user demand, to this phenomenon, therefore we have proposed a pollute soil restoration test device and are used for solving above-mentioned problem.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects existing in the prior art and providing a contaminated soil remediation test device.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a contaminated soil remediation test device comprises a stirring box, wherein discharge holes are formed in the inner wall of the bottom of the stirring box, supporting legs are fixedly connected to four corners of the bottom of the stirring box, one side of the top of the stirring box is communicated and fixed with a remediation liquid inlet pipe, a rectangular groove is formed in the bottom of the right side of the stirring box and is communicated with the discharge holes in a crossed mode, an L-shaped baffle is sleeved in the rectangular groove in a sliding mode, the right side of the L-shaped baffle extends out of the stirring box and is fixedly connected with a U-shaped handle, the L-shaped baffle is fixed with the right side of the stirring box in a magnetic absorption mode, a stirring rod is arranged in the stirring box, the top end of the stirring rod extends to the upper portion of the stirring box, the stirring box is rotatably sleeved on the stirring rod, and a plurality of;
the other side of the top of the stirring box is communicated and fixed with a rectangular feeding pipe, the top end of the rectangular feeding pipe is arranged to be a hopper-shaped structure, the bottom end of the rectangular feeding pipe extends into the stirring box, a first rotating shaft is rotatably arranged between the inner walls of the two sides of the rectangular feeding pipe, the right end of the first rotating shaft extends out of the rectangular feeding pipe, a second rotating shaft positioned below the rectangular feeding pipe is rotatably arranged on the inner wall of the top of the stirring box, and the right ends of the first rotating shaft and the second rotating shaft are fixedly connected with a first bevel gear, a second bevel gear fixedly sleeved on the stirring rod is meshed with the right side of the first bevel gear, a third bevel gear is meshed with the right side of the second bevel gear positioned above the first bevel gear, a driving motor is fixedly installed at the top of the stirring box, an output shaft of the driving motor is fixedly connected with the right side of the third bevel gear, and the outer side of the first rotating shaft is fixedly connected with a plurality of crushing cutters positioned in the rectangular feeding pipe;
the utility model discloses a crushing sword, including rectangle inlet tube, filter, sliding sleeve, spring movable sleeve, the intraductal movable sleeve of rectangle inlet tube is equipped with the filter that is located broken sword below, and the equal fixedly connected with guide bar in bottom both sides of filter, equal fixedly connected with sliding sleeve on the both sides inner wall of rectangle inlet tube, and sliding sleeve establishes on the guide bar that corresponds, fixedly connected with spring between the top of sliding sleeve and the bottom of filter, and spring movable sleeve establishes on the guide bar that corresponds, fixed cover is equipped with two eccentric wheels in the second pivot, the bottom nestification of guide bar has the ball, and the ball is located the.
Preferably, the distance between the bottom of the second rotating shaft and the bottom of the eccentric wheel is larger than the distance between the top of the second rotating shaft and the bottom of the ball.
Preferably, the outside cladding of L shape baffle has the rubber seal, and the outside of rubber seal and the inner wall sliding connection of rectangular channel, and the distance between the front side of L shape baffle and the rear side is greater than the distance between the front side of discharge opening and the rear side, L shape baffle is the iron material, and the right side bottom of agitator tank is seted up flutedly, and the recess internal bonding is fixed with the magnet piece, and the right side of magnet piece adsorbs mutually with the right side inner wall of L shape baffle.
Preferably, a first round hole is formed in the inner wall of the top of the stirring box, two first bearings are fixedly sleeved in the first round hole, and inner rings of the first bearings are welded and sleeved with the outer side of the stirring rod.
Preferably, a second round hole is formed in the inner walls of the two sides of the rectangular feeding pipe, a second bearing is fixedly sleeved in the second round hole, and the inner ring of the second bearing is welded and sleeved with the outer side of the first rotating shaft.
Preferably, the inner wall of the top of the stirring box is fixedly connected with two third bearings, and the inner ring of each third bearing is fixedly sleeved with the outer side of the second rotating shaft.
Preferably, the equal fixedly connected with stopper in one side bottom that two guide bars kept away from each other, and the distance between the top of stopper and the sliding sleeve that corresponds is less than the distance between the top of filter and the bottom of broken sword.
Compared with the prior art, the beneficial effects of the utility model are that:
through a stirring box, a discharge hole, an L-shaped baffle, a repair liquid inlet pipe, a rectangular feed pipe, a stirring rod, a first rotating shaft, a crushing cutter, a second rotating shaft, a first bevel gear, a second bevel gear, a driving motor, a third bevel gear, a filter plate, a sliding sleeve, a guide rod, a spring, an eccentric wheel and balls, the driving motor is started to drive the third bevel gear to rotate, the third bevel gear drives the stirring rod and the second bevel gear below through the second bevel gear above the third bevel gear to rotate, the stirring rod drives a plurality of stirring blades to rotate, the two second bevel gears respectively drive the first rotating shaft and the second rotating shaft to rotate through the two first bevel gears, the first rotating shaft drives a plurality of crushing cutters to rotate, the second rotating shaft drives the two eccentric wheels to rotate, the eccentric wheel rotates in the first half circle, the corresponding balls are upwards collided and extruded, so that the balls jump upwards and drive the filter plate to upwards stretch the springs through the corresponding guide rod, the eccentric wheel rotates the back half-turn gradually with the ball separation that corresponds, the spring that is in tensile state at this moment resets and drives the filter downstream, the eccentric wheel lasts the rotation and can drives the filter circulation and beat from top to bottom, pour soil into the rectangle inlet pipe this moment, a plurality of broken swoves in the rotation can carry out the breakage to the caking form soil that gets into, broken qualified soil passes the filter and flows into the agitator tank downwards, and the bold caking soil of complete breakage not, the filter that is beated from top to bottom by the circulation lasts upwards to get rid of to broken sword department and continues the breakage, realize the purpose that can evenly break gradually, advance the pipe injection into with soil repair liquid through repair liquid, soil repair liquid and the soil of even broken back whereabouts are stirred by a plurality of stirring leaves in the rotation and are mixed this moment.
The utility model relates to a rationally, convenient to use is convenient for carry out broken filtration to knot block-shaped soil, and is convenient for to filter off the not complete broken caking soil of crossing and upwards get rid of to broken sword department and continue smashing, reaches to possess before mixing and carries out the function of lasting even breakage to soil, improves mixed effect to avoid satisfying the user demand because of mixing inhomogeneous influence the phenomenon of experimental result, be favorable to using.
Drawings
Fig. 1 is a schematic structural view of a contaminated soil remediation test device provided by the present invention;
fig. 2 is a schematic sectional structural view of a contaminated soil remediation test apparatus provided by the present invention;
fig. 3 is an enlarged schematic view of a portion a in fig. 2.
In the figure: 100 stirring boxes, 101 discharge holes, 102L-shaped baffles, 103 repair liquid inlet pipes, 1 rectangular feed pipe, 2 stirring rods, 3 first rotating shafts, 4 crushing cutters, 5 second rotating shafts, 6 first bevel gears, 7 second bevel gears, 8 driving motors, 9 third bevel gears, 10 filter plates, 11 sliding sleeves, 12 guide rods, 13 springs, 14 eccentric wheels, 15 balls and 16 third bearings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Referring to fig. 1-3, a contaminated soil remediation test device comprises a stirring box 100, wherein discharge holes 101 are formed in the inner wall of the bottom of the stirring box 100, four corners of the bottom of the stirring box 100 are fixedly connected with support legs, one side of the top of the stirring box 100 is communicated and fixed with a remediation liquid inlet pipe 103, a rectangular groove is formed in the bottom of the right side of the stirring box 100 and is communicated with the discharge holes 101 in a crossed manner, an L-shaped baffle 102 is sleeved in the rectangular groove in a sliding manner, the right side of the L-shaped baffle 102 extends out of the stirring box 100 and is fixedly connected with a U-shaped handle, the L-shaped baffle 102 is fixed with the right side of the stirring box 100 in a magnetic attraction manner, a stirring rod 2 is arranged in the stirring box 100, the top end of the stirring rod 2 extends to the upper side of the stirring box 100, the stirring box 100 is rotatably sleeved on the stirring rod 2, and;
the other side of the top of the stirring box 100 is communicated and fixed with a rectangular feeding pipe 1, the top end of the rectangular feeding pipe 1 is arranged to be a hopper-shaped structure, the bottom end of the rectangular feeding pipe 1 extends into the stirring box 100, a first rotating shaft 3 is rotatably arranged between the inner walls of two sides of the rectangular feeding pipe 1, the right end of the first rotating shaft 3 extends out of the rectangular feeding pipe 1, a second rotating shaft 5 positioned below the rectangular feeding pipe 1 is rotatably arranged on the inner wall of the top of the stirring box 100, the right ends of the first rotating shaft 3 and the second rotating shaft 5 are both fixedly connected with a first bevel gear 6, the right side of the first bevel gear 6 is meshed with a second bevel gear 7 fixedly sleeved on the stirring rod 2, the right side of the second bevel gear 7 positioned above the two second bevel gears 7 is meshed with a third bevel gear 9, the top of the stirring box 100 is fixedly provided with a driving motor 8, and the output shaft of the driving motor 8 is fixedly, the outer side of the first rotating shaft 3 is fixedly connected with a plurality of crushing knives 4 positioned in the rectangular feeding pipe 1;
the rectangular inlet pipe 1 is movably sleeved with a filter plate 10 positioned below the crushing knife 4, both sides of the bottom of the filter plate 10 are fixedly connected with guide rods 12, both inner walls of both sides of the rectangular inlet pipe 1 are fixedly connected with sliding sleeves 11, the sliding sleeves 11 are slidably sleeved on the corresponding guide rods 12, springs 13 are fixedly connected between the tops of the sliding sleeves 11 and the bottoms of the filter plates 10, the springs 13 are movably sleeved on the corresponding guide rods 12, two eccentric wheels 14 are fixedly sleeved on the second rotating shaft 5, balls 15 are nested at the bottom ends of the guide rods 12, the balls 15 are positioned above the corresponding eccentric wheels 14 and matched with the eccentric wheels 14, the utility model has the advantages of reasonable design and convenient use, is convenient for crushing and filtering lumpy soil, and is convenient for continuously and upwards swinging the filtered lumpy soil which is not completely crushed to the crushing knife 4 for continuous crushing, and achieves the function of continuously and uniformly crushing the soil before mixing, the mixing effect is improved, so that the phenomenon that the experimental result is influenced due to uneven mixing is avoided, the use requirement is met, and the use is facilitated.
In the utility model, the distance between the bottom of the second rotating shaft 5 and the bottom of the eccentric wheel 14 is larger than the distance between the top of the second rotating shaft 5 and the bottom of the ball 15, the outside of the L-shaped baffle plate 102 is coated with the sealing rubber sheet, and the outside of the sealing rubber sheet is connected with the inner wall of the rectangular groove in a sliding way, the distance between the front side and the rear side of the L-shaped baffle plate 102 is larger than the distance between the front side and the rear side of the discharge hole 101, the L-shaped baffle plate 102 is made of iron material, the right bottom of the stirring box 100 is provided with a groove, and the groove is internally bonded and fixed with a magnet block, the right side of the magnet block is adsorbed with the right inner wall of the L-shaped baffle plate 102, the inner wall of the top of the stirring box 100 is provided with a first round hole, and the first round hole is internally fixed and sleeved with two first bearings, the inner ring of the first bearing is welded and sleeved, the second round hole is fixedly sleeved with a second bearing, the inner ring of the second bearing is welded and sleeved with the outer side of the first rotating shaft 3, the inner wall of the top part of the stirring box 100 is fixedly connected with two third bearings 16, the inner ring of the third bearings 16 is fixedly sleeved with the outer side of the second rotating shaft 5, the bottoms of the sides, far away from each other, of the two guide rods 12 are fixedly connected with limit blocks, and the distance between the tops of the limit blocks and the corresponding sliding sleeves 11 is smaller than the distance between the tops of the filter plates 10 and the bottoms of the crushing knives 4, so that the utility model has the advantages of reasonable design and convenient use, is convenient for crushing and filtering lumpy caking soil, is convenient for continuously throwing the filtered caking soil which is not completely crushed upwards to the crushing knives 4 for continuous crushing, has the function of continuously and uniformly crushing the soil before mixing, improves the mixing effect, thereby avoiding the phenomenon of influencing the experimental result due to, the use requirement is met, and the use is facilitated.
The working principle is as follows: when the crushing device is used, the driving motor 8 is started to drive the third bevel gear 9 to rotate, the third bevel gear 9 drives the second bevel gear 7 positioned above to rotate, the second bevel gear 7 positioned above drives the second bevel gear 7 positioned below to rotate through the stirring rod 2, the stirring rod 2 drives the stirring blades to rotate, the second bevel gear 7 drives the first bevel gear 6 meshed with the second bevel gear to rotate, the first bevel gear 6 positioned above drives the crushing knives 4 to rotate through the first rotating shaft 3, the first bevel gear 6 positioned below drives the two eccentric wheels 14 to rotate through the second rotating shaft 5, the eccentric wheels 14 upwards collide and extrude the corresponding balls 15 when rotating in the front half circle, under the collision extrusion force, the balls 15 upwards bounce and drive the corresponding guide rods 12 to slide in the sliding sleeves 11, the guide rods 12 drive the filter plates 10 to bounce upwards and stretch the springs 13, the eccentric wheel 14 gradually separates from the corresponding ball 15 when rotating for the second half circle, the spring 13 in the stretching state resets and drives the filter plate 10 to move downwards, and the eccentric wheel 14 continuously rotates, so that the filter plate 10 can be driven to circularly bounce up and down;
at the moment, soil is poured into the rectangular feeding pipe 1, the multiple crushing knives 4 in rotation can crush the entering caking soil, the crushed soil falls into the filter plate 10, the qualified soil after crushing passes through filter holes on the filter plate 10 and flows downwards into the stirring box 100, large caking soil which is not completely crushed is filtered at the top of the filter plate 10, the filter plate 10 which can run up and down circularly at the moment can throw up the caking soil to the crushing knives 4 to continue crushing when the caking soil runs up, the filter plate 10 runs up and down circularly to continuously throw up the caking soil to continue crushing, the aim of gradually and uniformly crushing is fulfilled under the continuous crushing of the circulation, soil repair liquid is injected through the repair liquid inlet pipe 103, the soil repair liquid and the soil falling after uniform crushing are stirred and mixed by the multiple stirring blades in rotation, so that the feeding pipe 1 in the rectangle has the function of continuously and uniformly crushing the soil before mixing, the mixing effect is improved.
In the description of the present application, it should be further noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, a connection through an intermediate medium, and a connection between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to specific circumstances.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (7)
1. The contaminated soil remediation test device comprises a stirring box (100), wherein discharge holes (101) are formed in the inner wall of the bottom of the stirring box (100), supporting legs are fixedly connected to four corners of the bottom of the stirring box (100), and a remediation liquid inlet pipe (103) is communicated and fixed to one side of the top of the stirring box (100), and is characterized in that a rectangular groove is formed in the bottom of the right side of the stirring box (100) and is communicated with the discharge holes (101) in a crossed manner, an L-shaped baffle (102) is sleeved in the rectangular groove in a sliding manner, the right side of the L-shaped baffle (102) extends out of the stirring box (100) and is fixedly connected with a U-shaped handle, the L-shaped baffle (102) and the right side of the stirring box (100) are fixed in a magnetic attraction manner, a stirring rod (2) is arranged in the stirring box (100), the top end of the stirring rod (2) extends to the upper side of the stirring box (100), and the stirring box, the outer side of the stirring rod (2) is fixedly connected with a plurality of stirring blades positioned in the stirring box (100);
the top opposite side of agitator tank (100) communicates and is fixed with rectangle inlet pipe (1), the top of rectangle inlet pipe (1) sets up to hopper-shaped structure, the bottom of rectangle inlet pipe (1) extends to in agitator tank (100), rotate between the both sides inner wall of rectangle inlet pipe (1) and install first pivot (3), the right-hand member of first pivot (3) extends outside rectangle inlet pipe (1), rotate on the top inner wall of agitator tank (100) and install second pivot (5) that are located rectangle inlet pipe (1) below, the right-hand member of first pivot (3) and second pivot (5) all is fixedly connected with first bevel gear (6), and the right side meshing of first bevel gear (6) has fixed cover to establish second bevel gear (7) on puddler (2), the right side meshing of the second bevel gear (7) that is located the top in two second bevel gear (7) has third bevel gear (9), a driving motor (8) is fixedly installed at the top of the stirring box (100), an output shaft of the driving motor (8) is fixedly connected with the right side of a third bevel gear (9), and the outer side of the first rotating shaft (3) is fixedly connected with a plurality of crushing knives (4) positioned in the rectangular feeding pipe (1);
the utility model discloses a crushing cutter, including rectangle inlet pipe (1), rectangle inlet pipe (1) internalization cover is equipped with filter (10) that is located broken sword (4) below, and the equal fixedly connected with guide bar (12) in bottom both sides of filter (10), equal fixedly connected with sliding sleeve (11) on the both sides inner wall of rectangle inlet pipe (1), and sliding sleeve (11) slip cap is established on corresponding guide bar (12), fixedly connected with spring (13) between the top of sliding sleeve (11) and the bottom of filter (10), and spring (13) activity cover is established on corresponding guide bar (12), fixed cover is equipped with two eccentric wheels (14) on second pivot (5), the bottom nestification of guide bar (12) has ball (15), and ball (15) are located the top of corresponding eccentric wheel (14) and cooperate with eccentric wheel (14).
2. A contaminated soil remediation test apparatus according to claim 1, wherein the distance between the bottom of the second shaft (5) and the bottom of the eccentric (14) is greater than the distance between the top of the second shaft (5) and the bottom of the ball (15).
3. The contaminated soil remediation test device according to claim 1, wherein the outer side of the L-shaped baffle (102) is coated with a sealing rubber sheet, the outer side of the sealing rubber sheet is slidably connected with the inner wall of the rectangular groove, the distance between the front side and the rear side of the L-shaped baffle (102) is larger than the distance between the front side and the rear side of the discharge hole (101), the L-shaped baffle (102) is made of iron material, a groove is formed in the bottom of the right side of the stirring box (100), a magnet block is fixedly bonded in the groove, and the right side of the magnet block is adsorbed to the inner wall of the right side of the L-shaped baffle (102).
4. The contaminated soil remediation test device according to claim 1, wherein a first circular hole is formed in the inner wall of the top of the stirring box (100), two first bearings are fixedly sleeved in the first circular hole, and inner rings of the first bearings are welded and sleeved with the outer side of the stirring rod (2).
5. The contaminated soil remediation test device according to claim 1, wherein second round holes are formed in the inner walls of the two sides of the rectangular feeding pipe (1), a second bearing is fixedly sleeved in each second round hole, and an inner ring of each second bearing is welded and sleeved on the outer side of the first rotating shaft (3).
6. The contaminated soil remediation test device according to claim 1, wherein two third bearings (16) are fixedly connected to the inner wall of the top of the stirring tank (100), and the inner rings of the third bearings (16) are fixedly sleeved with the outer side of the second rotating shaft (5).
7. A contaminated soil remediation test device according to claim 1, wherein a limiting block is fixedly connected to the bottom of the side of each of the two guide rods (12) away from each other, and the distance between the top of the limiting block and the corresponding sliding sleeve (11) is smaller than the distance between the top of the filter plate (10) and the bottom of the crushing knife (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021750073.XU CN212845370U (en) | 2020-08-20 | 2020-08-20 | Contaminated soil restoration test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021750073.XU CN212845370U (en) | 2020-08-20 | 2020-08-20 | Contaminated soil restoration test device |
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| CN212845370U true CN212845370U (en) | 2021-03-30 |
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| CN202021750073.XU Active CN212845370U (en) | 2020-08-20 | 2020-08-20 | Contaminated soil restoration test device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113102070A (en) * | 2021-05-20 | 2021-07-13 | 上海园林绿化建设有限公司 | Pollute soil restoration processing apparatus |
| CN113145637A (en) * | 2021-04-02 | 2021-07-23 | 赵文灏 | Microbial degradation's soil prosthetic devices |
| CN113731280A (en) * | 2021-09-02 | 2021-12-03 | 江西省地质工程(集团)公司 | Mixing device for preparing heavy metal contaminated soil composite passivator and use method |
| CN114307361A (en) * | 2021-12-16 | 2022-04-12 | 崔亚岐 | A equipment for acetic acid decoloration is handled |
-
2020
- 2020-08-20 CN CN202021750073.XU patent/CN212845370U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113145637A (en) * | 2021-04-02 | 2021-07-23 | 赵文灏 | Microbial degradation's soil prosthetic devices |
| CN113102070A (en) * | 2021-05-20 | 2021-07-13 | 上海园林绿化建设有限公司 | Pollute soil restoration processing apparatus |
| CN113731280A (en) * | 2021-09-02 | 2021-12-03 | 江西省地质工程(集团)公司 | Mixing device for preparing heavy metal contaminated soil composite passivator and use method |
| CN113731280B (en) * | 2021-09-02 | 2024-04-30 | 江西省地质工程(集团)公司 | Mixing device for preparing heavy metal contaminated soil composite passivating agent and use method |
| CN114307361A (en) * | 2021-12-16 | 2022-04-12 | 崔亚岐 | A equipment for acetic acid decoloration is handled |
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