CN214348606U

CN214348606U - Soil catalysis leaching device with multistage rotary screen

Info

Publication number: CN214348606U
Application number: CN202021904337.2U
Authority: CN
Inventors: 丁莹
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-03
Filing date: 2020-09-03
Publication date: 2021-10-08
Anticipated expiration: 2030-09-03

Abstract

The embodiment of the utility model relates to the technical field of soil remediation, in particular to a soil catalytic leaching device with a multi-stage rotary screen, which comprises an upper hood and a lower box body; a feeding screw is rotationally arranged in the upper hood, and a first driving mechanism is correspondingly arranged on the feeding screw; the feeding screw comprises a transmission shaft and a helical blade which are of a hollow structure, and a plurality of through holes are formed in the transmission shaft and the helical blade; the other end of the transmission shaft is rotatably connected with a sealing water jacket; a leaching cavity is arranged in the lower box body, at least one layer of rotating screen is arranged in the leaching cavity from top to bottom, and a sludge discharge chute is arranged at the lower part of the lower box body and corresponds to the transfer screen; one side of the lower box body is correspondingly connected with a reciprocating driving mechanism with the rotary screen. The utility model discloses reasonable novelty, compact structure, strong adaptability, the productivity is big, and the treatment effeciency is high, can the efficient drip washing, screening processing to polluting soil, realizes polluting the minimizing of soil and handles, promotes drip washing and catalytic effect.

Description

Soil catalysis leaching device with multistage rotary screen

Technical Field

The utility model relates to a soil restoration technical field, concretely relates to soil catalysis drip washing device with multistage rotary screen.

Background

With the continuous acceleration of urbanization and industrialization, the overall situation of soil pollution in China is severe. Causes soil pollution, such as industrial sludge, domestic garbage, sewage irrigation, pollutant sedimentation in the atmosphere, and a large amount of heavy metal-containing fertilizers and pesticides. According to preliminary statistics, nearly 1/5 cultivated lands in China are polluted in different degrees, the polluted soil can cause crop yield reduction, even pollutants in agricultural products exceed standards, particularly heavy metals exceed standards, so that the harmful effects on human bodies are caused, and the human health is not facilitated. In addition, site pollution caused by industrial and mining enterprises is also very serious, and particularly, the area of the polluted site is increased continuously due to the relocation of the polluted enterprises of chemical engineering, metallurgy and the like. "all-things soil grows", and the quality of soil determines the quality of all things, so in order to guarantee food safety and health of human beings, high attention must be paid to prevention of soil pollution and remediation of polluted soil.

At present, some soil remediation methods which are already implemented are available at home and abroad, such as a contaminated soil bioremediation technology, a contaminated soil physical remediation technology, a contaminated soil chemical remediation technology and a contaminated soil combined remediation technology. The bioremediation technology comprises phytoremediation, microbial remediation, biological combined remediation and the like, but the bioremediation technology is low in pertinence and low in efficiency, and pollutants such as heavy metal ions cannot be removed. Physical remediation techniques are techniques for removing or separating contaminants from soil by various physical processes, which are costly and cumbersome to handle. Compared with physical remediation, the chemical remediation technology of the polluted soil is developed earlier, and mainly comprises a leaching technology, a solvent leaching technology, an oxidation-reduction technology, electrodynamics remediation and the like. The chemical leaching technology is one of the common methods for repairing the polluted soil in the prior art, but based on the huge amount of the polluted soil in the prior art, the problems of low productivity, low treatment efficiency, large subsequent treatment capacity and the like of the device for repairing the polluted soil by chemical leaching cannot be effectively solved. Therefore, there is a need for a contaminated soil remediation device that overcomes the above problems.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the embodiment of the utility model provides a soil catalysis drip washing device with multistage rotary screen, the utility model discloses a realize through following technical scheme:

a soil catalytic leaching device with a multi-stage rotary screen comprises an upper hood and a lower box body matched with the upper hood;

a feeding screw is rotatably arranged in the upper hood along the length direction, a first driving mechanism is arranged at one end of the upper hood corresponding to the feeding screw, and the first driving mechanism drives the feeding screw to rotate along the axial direction; a fixed screen is arranged on the lower side of the upper machine cover in parallel with the feeding screw;

the feeding screw comprises a transmission shaft and a screw blade fixedly wound on the circumference of the transmission shaft; the transmission shaft and the spiral blades are of hollow structures, and a plurality of through holes are formed in the transmission shaft and the spiral blades; the other end of the transmission shaft is rotatably connected with a sealing water jacket, and gas or liquid medium with catalysis or leaching function can be injected into the feeding screw through the sealing water jacket and released into the inner cavity of the soil catalysis leaching device;

a leaching cavity is arranged in the lower box body, at least one layer of rotating screen is arranged in the leaching cavity from top to bottom, and a sludge discharge chute is arranged at the lower part of the lower box body and corresponds to the transfer screen;

and one side of the lower box body is correspondingly connected with a reciprocating driving mechanism with the rotary screen, and the reciprocating driving mechanism can drive the rotary screen to rotate in a reciprocating manner along the central axis.

Further, fixed screen cloth, rotation screen cloth and row's mud chute parallel arrangement, and fixed screen cloth, rotation screen cloth, row's mud chute and horizontal contained angle are 3-8 degrees.

Furthermore, the rotating screens comprise a first rotating screen, a second rotating screen and a third rotating screen which are arranged in the leaching cavity in parallel from top to bottom; the first rotary screen, the second rotary screen and the third rotary screen have the same structure.

Further, the first rotating screen comprises an arc-shaped screen plate and side end plates arranged at two ends of the arc-shaped screen plate; a plurality of sieve pores are uniformly arranged on the arc-shaped sieve plate; the side end plates on the two sides are respectively provided with a first supporting shaft and a second supporting shaft.

Furthermore, one side of the tail of the lower box body corresponds to the first rotary screen, the second rotary screen and the third rotary screen and is provided with a discharging mechanism.

Further, the material discharging mechanism comprises a material receiving dustpan and a material discharging pipe arranged at the tail end of the material receiving dustpan.

Furthermore, the reciprocating driving mechanism comprises a first reciprocating driving mechanism, a second reciprocating driving mechanism and a third reciprocating driving mechanism which are connected with the same structure on one side of the lower box body machine head and are correspondingly connected with the first rotary screen, the second rotary screen and the third rotary screen.

Furthermore, first reciprocating drive mechanism includes the waist type drive block that second driving motor and second driving motor driving shaft tip set up, waist type drive block one end is connected with drive connecting rod one end hinge through first fixed pivot, the drive connecting rod other end is connected with the second fixed pivot hinge that rotates screen cloth one end setting.

Furthermore, an arc-shaped sliding groove for sliding and clamping the second fixed pivot is formed in the side end face of the lower box body.

Further, the first driving mechanism comprises a transmission belt pulley fixedly sleeved at one end of the feeding screw and a first driving motor connected through a transmission belt.

Compared with the prior art the utility model discloses beneficial effect does:

1. the utility model has reasonable and novel design and compact structure, can efficiently drip and screen the polluted soil, realize the reduction treatment of the polluted soil, enrich the pollutants, and greatly reduce the pressure of the subsequent harmless treatment;

2. the utility model has strong adaptability, is suitable for the catalytic leaching of polluted soil of different types, has large yield and high treatment efficiency, and meets the requirement of industrial production process;

3. the utility model discloses a sealed water jacket that pay-off spiral and cooperation set up, can the efficient realize catalyzing, drip washing and intensive mixing to polluting soil thick liquid, promote drip washing and catalytic effect greatly.

Drawings

FIG. 1 is a front view of an embodiment of the soil leaching catalytic system of the present invention;

FIG. 2 is a schematic view of the internal structure of an embodiment of the soil leaching catalytic system of the present invention;

FIG. 3 is a left side view of an embodiment of the soil leaching catalytic system of the present invention;

FIG. 4 is a right side view of an embodiment of the soil leaching catalytic system of the present invention;

fig. 5 is a schematic view of a first viewing angle structure of the rotary screen of the present invention;

fig. 6 is a second view structural diagram of the rotary screen of the present invention;

FIG. 7 is an enlarged view of the structure at A in FIG. 1;

FIG. 8 is an enlarged view of the structure at B in FIG. 3;

FIG. 9 is a schematic view of the structure of the feed screw and the sealing water jacket of the present invention;

fig. 10 is a schematic view of a transmission shaft of the feeding screw according to the present invention;

FIG. 11 is a schematic cross-sectional view of the feed screw and the water jacket of FIG. 9;

fig. 12 is an enlarged schematic cross-sectional view of the drive shaft and the water jacket of fig. 11.

In the figure:

100. a soil catalytic leaching device; 110. feeding a hopper; 120. an upper hood; 130. sealing the water jacket; 131. A first bearing gland; 132. a bearing housing; 133. an access pipe; 134. a first seal ring; 135. a set screw; 136. a second bearing cap; 137. an annular water jacket; 138. an annular boss; 139. a pressure bearing; 1310. a second seal ring; 140. a discharge mechanism; 141. a material receiving dustpan; 142. a discharge pipe; 150. A sludge discharge outlet; 160. a lower box body; 170. a first drive mechanism; 171. a drive pulley; 172. a transfer belt; 173. a first drive motor; 180. a first reciprocating drive mechanism; 181. a second drive motor; 182. a waist-shaped driving block; 183. a first fixed pivot; 184. a drive link; 190. a support frame; 200. A second reciprocating drive mechanism; 210. a third reciprocating drive mechanism; 220. a feed screw; 221. a drive shaft; 222. a helical blade; 223. a first via hole; 224. a spiral wire groove; 225. a second via hole; 226. A first cavity; 227. a second cavity; 228. a third via hole; 230. fixing the screen; 240. a first rotating screen; 241. an arc-shaped sieve plate; 242. screening holes; 243. a side end plate; 244. a sludge discharge groove; 245. a first support shaft; 246. a second fixed pivot; 247. a second support shaft; 250. a second rotating screen; 260. A third rotary screen; 270. a sludge discharge chute; 280. a bearing; 290. an arc chute.

Detailed Description

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.

Example (b):

referring to fig. 1 to 12, the present invention discloses a soil catalytic leaching apparatus with a multi-stage rotary screen, wherein the soil catalytic leaching apparatus 100 includes an upper hood 120 and a lower box 160 disposed in cooperation with the upper hood 120;

a feeding screw 220 is rotatably arranged in the upper hood 120 along the length direction, a first driving mechanism 170 is arranged at one end of the upper hood 120 corresponding to the feeding screw 220, and the feeding screw 220 is driven to rotate along the axial direction by the first driving mechanism 170; a fixed screen 230 is arranged on the lower side of the upper hood 120 in parallel with the feeding screw 220; the fixed screen 230 has a larger mesh diameter, and has the main function of delaying the soil to be polluted from entering the leaching cavity of the lower box 160, and the catalytic liquid or gas gradually released by the feeding screw 220 in the cavity enclosed by the fixed screen 230 and the upper housing 120 fully acts; in this embodiment, the preferable feeding method is to mix the contaminated soil with water to form a viscous slurry with certain fluidity and feed the slurry into the discharge hopper 110.

Referring to fig. 8 to 12, in the present embodiment, the feeding screw 220 includes a driving shaft 221 and a screw blade 222 fixedly wound around the circumference of the driving shaft 221; the feeding screw 220 is fixedly connected with the upper cover 120 through bearings 280 sleeved at two ends of the feeding screw; the transmission shaft 221 and the helical blade 222 are hollow structures, and a plurality of through holes are formed in the transmission shaft 221 and the helical blade 222; the other end of the transmission shaft 221 is rotatably connected with a sealing water jacket 130, and a gas or liquid medium with a catalytic or leaching effect can be injected into the feeding screw 220 through the sealing water jacket 130 and released into the inner cavity of the soil catalytic leaching device 100.

Specifically, the feeding screw 220 is used for carrying out efficient powder or slurry conveying and is accompanied by a strong stirring effect, so that the catalytic effect is improved by injecting a catalytic gas or liquid medium into the polluted soil through the sealing water jacket 130 and the transmission shaft 221 to combine with the polluted soil.

More specifically, a first cavity 226 is arranged inside the transmission shaft 221, and a plurality of open structures communicated with the first cavity 226 are arranged on the circumference of the transmission shaft 221 along the spiral line of the spiral blade 222; in this embodiment, the open structure is a spiral slot 224 in communication with a first cavity 226; the structure can conveniently and rapidly lead the liquid or gas medium with catalytic action in the first cavity 226 to enter the second cavity 227 of the helical blade 222 through the helical groove 224 and be discharged through the first through hole 223 on the helical blade 222; in another embodiment, the open structure may also be a second via 225 in communication with the first cavity 226; this structure is also capable of performing its function.

More specifically, the helical blade 222 is internally provided with a second cavity 227, the inner edge of the helical blade 222 is provided with an opening, the opening of the inner edge of the helical blade 222 corresponds to the open structure of the transmission shaft 221, the plate body of the helical blade 222 is provided with a plurality of first through holes 223 communicated with the second cavity 227, and the second cavity 227 is communicated with the first cavity 226 through the open structure; namely, the leaching agent such as water or gas or liquid medium with catalytic function can be injected into the inner cavity of the soil catalytic leaching device 100 through the water sealing sleeve 130 and the feeding screw 220;

referring to fig. 11 and 12, a plurality of third through holes 228 are formed in the circumference of one end of the driving shaft 221, and the sealing water jacket 130 is arranged corresponding to the third through holes 228 and passes through the third through holes 228 and the first cavity 226 in the driving shaft 221; a gas or liquid medium having a catalytic or cleaning function may be injected into the feed screw 220 through the sealing water jacket 130. It should be noted that the sealing water jacket 130 in the present embodiment may be a conventionally arranged sealing water jacket, which also has a function of injecting a liquid or gaseous medium into the relatively rotating member.

In this embodiment, the water jacket 130 includes a first bearing cover 131, a second bearing cover 136, and a bearing sleeve 132 disposed between the first bearing cover 131 and the second bearing cover 136, which are disposed oppositely, two bearing bearings 139 are disposed at two ends of an inner ring of the bearing sleeve 132, an annular water jacket 137 is disposed between the two bearing bearings 139, and an access pipe 133 communicated with the annular water jacket 137 is disposed on the bearing sleeve 132; the first bearing cover 131 and the second bearing cover 136 are fixedly connected with the bearing sleeve 132 through a fixing screw 135; a gas or liquid medium with a catalytic or purifying function can be injected into the annular water jacket 137 through the access pipe 133, and the gas or liquid medium with the catalytic or purifying function in the annular water jacket 137 enters the first cavity 226 in the transmission shaft 221 through the third through hole 228; the sealing water jacket 130 with the structure can meet the relative rotation of the feeding screw 220 and the sealing water jacket 130.

Preferably, the inner sides of the first bearing cover 131 and the second bearing cover 136 protrude to form an annular boss 138, the outer edge of the annular boss 138 is clamped at the inner edge of the bearing sleeve 132, and the end face of the annular boss 138 abuts against the outer bearing shell side face of the bearing 139; the sealing water jacket 130 with the structure is more compact and firm in structure.

Preferably, a second sealing ring 1310 is arranged between the first bearing cover 131 or the second bearing cover 136 and the bearing 139; a first sealing ring 134 is arranged between the pressure bearing 139 and the annular water jacket 137, and the sealing performance of the sealing water jacket 130 is further improved by the first sealing ring 134 and the second sealing ring 1310.

Referring to fig. 2 to 4, a leaching cavity is arranged in the lower box 160, at least one layer of rotating screen is arranged in the leaching cavity from top to bottom, a sludge discharge chute 270 is arranged at the lower part of the lower box 160 corresponding to the transfer screen, and a sludge discharge outlet 150 is arranged at the tail end of the sludge discharge chute 270; the contaminated soil slurry dripped from the fixed screen 230 can be screened through a multi-stage rotating screen, so that the contaminated soil with different particles can be separated, the large-particle soil is grabbed from the upper layer to the screen discharge system, and fine particle slurry containing more pollutants gradually descends and is enriched and then discharged from the system through the sludge discharge chute 270 to be subjected to subsequent purification treatment.

Specifically, a reciprocating driving mechanism is connected to one side of the lower box 160 corresponding to the rotary screen, and the reciprocating driving mechanism can drive the rotary screen to rotate back and forth along the central axis; a screening process of polluted soil slurry through continuous small-angle rotation of the rotating screen; in this embodiment, the reciprocating driving mechanism and the first driving mechanism 170 are fixedly disposed on the supporting frame 190 disposed at the left side of the soil catalytic leaching apparatus 100.

Referring to fig. 2, the fixed screen 230, the rotary screen and the sludge discharge chute 270 are arranged in parallel, and the included angle between the fixed screen 230, the rotary screen and the sludge discharge chute 270 and the horizontal plane is 3-8 degrees; the fixed screen 230, the rotary screen and the mud discharging chute 270 with the structure can conveniently and efficiently discharge granular soil with corresponding grain sizes out of the system.

Referring to fig. 5 and 6, the rotary screens include a first rotary screen 240, a second rotary screen 250, and a third rotary screen 260, which are arranged in parallel from top to bottom in the washing chamber; the first rotary screen 240, the second rotary screen 250 and the third rotary screen 260 have the same structure; the difference is that the width of the rotary screen in the next stage and the arc length of the arc-shaped screen plate are larger.

Specifically, the first rotary screen 240 includes an arc-shaped screen panel 241 and side end panels 243 disposed at both ends of the arc-shaped screen panel 241; a plurality of sieve holes 242 are uniformly arranged on the arc-shaped sieve plate 241; a first supporting shaft 245 and a second supporting shaft 247 are respectively arranged on the side end plates 243 at the two sides, and a sludge discharge groove 244 is formed in the side end plate 243 at the tail; preferably, the first rotating screen 240 has a larger diameter than the second rotating screen 250, and the second rotating screen 250 has a larger diameter than the third rotating screen 260.

Specifically, the discharging mechanism 140 is respectively arranged on one side of the tail of the lower box 160 corresponding to the first rotary screen 240, the second rotary screen 250 and the third rotary screen 260; the discharge mechanism 140 comprises a material receiving dustpan 141 and a discharge pipe 142 arranged at the tail end of the material receiving dustpan 141; it should be noted that the material receiving dustpan 141 has the same radian as the rotating screen, and the arc length of the material receiving dustpan 141 is proportional to the width of the corresponding rotating screen.

Referring to fig. 7 and 8, the reciprocating driving mechanism includes a first reciprocating driving mechanism 180, a second reciprocating driving mechanism 200, and a third reciprocating driving mechanism 210, which have the same structure, and are connected to one side of the head of the lower casing 160 corresponding to the first rotary screen 240, the second rotary screen 250, and the third rotary screen 260.

The first reciprocating driving mechanism 180 comprises a second driving motor 181 and a waist-shaped driving block 182 arranged at the end of a driving shaft of the second driving motor 181, wherein one end of the waist-shaped driving block 182 is hinged with one end of a driving link 184 through a first fixed pivot 183, and the other end of the driving link 184 is hinged with a second fixed pivot 246 arranged at one end of a rotary screen; an arc-shaped sliding chute 290 for the sliding clamping of the second fixed pivot 246 is formed on the end face of the lower box body 160; one end of the second fixed pivot 246 is fixedly connected with the side end plate 243 of the rotary screen, the other end of the second fixed pivot penetrates out of the lower box 160 through the arc chute 290 to be hinged with the driving connecting rod 184, the rotary screen can be periodically driven through the reciprocating driving mechanism, the rotary screen can be periodically and reciprocally rotated along the connecting axis of the first supporting shaft 245 and the second supporting shaft 247, the rotating angle of the rotary screen is +/-30 degrees, the rotating speed of the second driving motor 181 can be adjusted, the rotating frequency of the rotary screen can be adjusted, and the screening process is accelerated.

Referring to fig. 1 and 3, the first driving mechanism 170 includes a driving pulley 171 fixedly sleeved at one end of the feeding screw 220 and a first driving motor 173 connected by a transmission belt 172, and the feeding screw 220 can be driven by the first driving mechanism 170.

It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicating the directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The terms "comprises," "comprising," or any other similar term are intended to cover a non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, article, or apparatus.

So far, the technical solution of the present invention has been described with reference to the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, a person skilled in the art can make equivalent changes or substitutions to the related technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. The soil catalytic leaching device with the multi-stage rotary screen is characterized in that the soil catalytic leaching device (100) comprises an upper hood (120) and a lower box body (160) matched with the upper hood (120);

a feeding screw (220) is rotatably arranged in the upper hood (120) along the length direction, a first driving mechanism (170) is arranged at one end of the upper hood (120) and corresponds to the feeding screw (220), and the feeding screw (220) is driven to rotate along the axial direction by the first driving mechanism (170); a fixed screen (230) is arranged on the lower side of the upper hood (120) and in parallel with the feeding screw (220);

the feeding screw (220) comprises a transmission shaft (221) and a screw blade (222) fixedly wound on the circumference of the transmission shaft (221); the transmission shaft (221) and the helical blade (222) are of hollow structures, and a plurality of through holes are formed in the transmission shaft (221) and the helical blade (222); the other end of the transmission shaft (221) is rotatably connected with a sealing water jacket (130), and gas or liquid medium with catalysis or leaching action can be injected into the feeding screw (220) through the sealing water jacket (130) and released into the inner cavity of the soil catalysis leaching device (100);

a leaching cavity is arranged in the lower box body (160), at least one layer of rotating screen is arranged in the leaching cavity from top to bottom, and a sludge discharge chute (270) is arranged at the lower part of the lower box body (160) corresponding to the transfer screen;

one side of the lower box body (160) is correspondingly connected with a reciprocating driving mechanism with the rotary screen, and the reciprocating driving mechanism can drive the rotary screen to rotate in a reciprocating mode along the central axis.

2. The catalytic soil washing apparatus with multi-stage rotary screens of claim 1, wherein the fixed screen (230), the rotary screen and the sludge discharge chute (270) are arranged in parallel, and the fixed screen (230), the rotary screen and the sludge discharge chute (270) are at an angle of 3-8 degrees with the horizontal.

3. The catalytic soil washing apparatus with multi-stage rotary screens of claim 2, wherein the rotary screens comprise a first rotary screen (240), a second rotary screen (250) and a third rotary screen (260) arranged in parallel from top to bottom in the washing chamber; the first rotary screen (240), the second rotary screen (250) and the third rotary screen (260) have the same structure.

4. A catalytic soil washing arrangement with multi-stage rotary screens according to claim 3, wherein the first rotary screen (240) comprises a curved screen deck (241) and side end plates (243) arranged at both ends of the curved screen deck (241); a plurality of sieve holes (242) are uniformly arranged on the arc-shaped sieve plate (241); the side end plates (243) on the two sides are respectively provided with a first supporting shaft (245) and a second supporting shaft (247).

5. The soil catalytic washing device with the multi-stage rotary screens as claimed in claim 4, wherein the discharge mechanism (140) is arranged on the tail side of the lower box body (160) corresponding to the first rotary screen (240), the second rotary screen (250) and the third rotary screen (260).

6. The soil catalytic washing apparatus with multi-stage rotary screen as claimed in claim 5, wherein the discharging mechanism (140) comprises a receiving dustpan (141) and a discharging pipe (142) arranged at the end of the receiving dustpan (141).

7. The soil catalytic washing apparatus with multi-stage rotary screen as claimed in any one of claims 1 to 6, wherein the reciprocating driving mechanism comprises a first reciprocating driving mechanism (180), a second reciprocating driving mechanism (200) and a third reciprocating driving mechanism (210) which are connected with the same structure on one side of the head of the lower box (160) and are correspondingly connected with the first rotary screen (240), the second rotary screen (250) and the third rotary screen (260).

8. The soil catalytic washing apparatus with multi-stage rotary screen as claimed in claim 7, wherein the first reciprocating driving mechanism (180) comprises a second driving motor (181) and a waist-shaped driving block (182) arranged at the end of the driving shaft of the second driving motor (181), one end of the waist-shaped driving block (182) is hinged with one end of a driving link (184) through a first fixed pivot (183), and the other end of the driving link (184) is hinged with a second fixed pivot (246) arranged at one end of the rotary screen.

9. The soil catalytic washing apparatus with multi-stage rotary screen as claimed in claim 8, wherein the side end face of the lower box (160) is provided with an arc chute (290) for slidably clamping the second fixed pivot (246).

10. The catalytic soil washing apparatus with multi-stage rotary screen according to claim 1, wherein the first driving mechanism (170) comprises a driving pulley (171) fixedly sleeved at one end of the feeding screw (220) and a first driving motor (173) connected by a transmission belt (172).