CN219469887U - Screening device for dredging sludge recovery - Google Patents

Abstract

A sieving device for dredging sludge recovery comprises a pretreatment separation box, a spiral tube sieve, a spray box and a sieving box; the pretreatment separating box comprises an outer cylinder, a base, an inner cylinder, a screening module and a spraying module; the spiral screen feeding pipe, the horizontal cylinder body and the spiral pushing plate are arranged at the upper end of the horizontal cylinder body, and the horizontal cylinder body is provided with a filter screen; the spray box comprises a box body and a spray header; the screening box comprises a body and a screen. According to the utility model, through arranging the pretreatment separation box, the spiral screen, the spray box and the screening box and further carrying out structural optimization on the pretreatment separation box, the effects of screening and pre-cleaning large-amount and viscous dredging sludge in the pretreatment separation box are realized, the working efficiency of the whole system is improved, the load of the sludge on device parts is reduced, and the device has the advantages of strong practicability and wide application range.

Description

Screening device for dredging sludge recovery

Technical Field

The utility model belongs to the technical field of resource utilization of available dredging sludge, and particularly relates to a screening device for dredging sludge recovery.

Background

The natural river bed is commonly deposited with a gravel layer, and dredging sludge generated in the river channel during the dredging process contains a large amount of sand and stone. The sand and mud generated by the early channel dredging operation is basically discarded, and a large amount of land is required to be occupied for stacking, so that land resource waste is caused. In recent years, along with economic development, the demand of the construction industry for sand and stone is increasing, and the application prospect of channel dredging sand and stone as a construction material is wide. The main problems faced by recycling the dredged sand as building materials are as follows: due to the complex components of the dredging sludge, the dredging sludge contains organic matters and clay minerals, and sand and stone are difficult to separate from the dredging sludge; part of river channels are seriously polluted and receive a large amount of pollutant deposition, so that the dredging sand and stone is required to be subjected to purification treatment to remove the pollutants attached to the surface, and the pollution such as heavy metal, high-concentration sulfate and the like is not dissolved out; as building materials, the requirements of certain granularity and mud content are met, the particle size range of common pebbles and gravels for building is 5-90mm, and the mud content is lower than 10%.

The document entitled to bulletin number CN213967995U discloses a dredging sand recycling disposal system comprising: the separation pretreatment module comprises a total feed inlet, a base bracket, a spiral drum screen and a high-pressure water spraying device; the deep cleaning module comprises a screening feed port, a conveying device, a deep spraying device and a screening discharge port; the screening module comprises a power device, a vibrating box, an upper screen and a lower screen; the cleaning agent adding module comprises a high-flow spraying device, a cleaning agent pipeline, a cleaning agent storage barrel, a booster pump and a flow control valve; the device also comprises a cleaning wastewater recycling module which comprises a wastewater collecting pipeline, a water supply pipeline, a sedimentation tank, a sedimentation agent storage barrel and a mud discharging pipeline. When the dredging device is used, dredging slurry is directly conveyed to a total feed port through a cutter suction dredging ship, impurities such as garbage and stones in the sludge are firstly filtered and removed through a rough filter grid with the surface aperture of 90mm of the total feed port, and then the filtered sludge sequentially passes through a spiral drum screen, a deep cleaning module and a screening module to finish cleaning separation and collection of dredging sand and stones.

However, due to the characteristics of large quantity and viscosity of the dredging sludge, the problem that the first process is easy to cause grid blockage and grid deformation only by filtering through the coarse filtration grid, and when the dredging sludge is used, a large quantity of dredging sludge cannot be input for treatment, the quantity of the dredging sludge needs to be controlled, and the efficiency is low.

Disclosure of Invention

Aiming at the problems, the utility model aims to provide the screening device for dredging sludge recovery, which realizes the effects of screening and pre-cleaning large-volume and viscous dredging sludge in the pretreatment separation box by arranging the pretreatment separation box, the spiral screen, the spray box and the screening box and further carrying out structural optimization on the pretreatment separation box, improves the working efficiency of the whole system, reduces the load of the sludge on device parts, and has the advantages of strong practicability and wide application range.

In order to achieve the above object, the technical scheme of the present utility model is as follows:

a sieving device for dredging sludge recovery comprises a pretreatment separation box, a spiral tube sieve, a spray box and a sieving box; the pretreatment separating box comprises an outer barrel, a base arranged on the bottom surface of the outer barrel, an inner barrel arranged on the base, a screening module arranged at the upper end of the inner barrel and a spraying module arranged on the inner wall of the outer barrel; the spiral cylinder screen comprises a feeding pipe for receiving the discharging of the inner cylinder, a horizontal cylinder body connected with the feeding pipe and a spiral pushing plate arranged in the horizontal cylinder body, a spray pipe is arranged at the upper end of the horizontal cylinder body, and a filter screen is arranged on the horizontal cylinder body; the spray box comprises a box body connected with the discharge port of the horizontal cylinder body and a spray header arranged at the upper end of the box body; the screening box comprises a body connected with the outlet of the box body and a screen arranged in the body.

As a further preferred aspect of the present utility model, the outer cylinder includes an outer cylinder body, a feed inlet provided at an upper end of the outer cylinder body, a discharge outlet provided at a lower end of the outer cylinder body, and an annular opening provided on a side wall of the outer cylinder body.

As a further preferred aspect of the present utility model, the base includes a first leg provided on an inner bottom surface of the outer cylinder body, a cylindrical base provided on the first leg, a circular hole provided on a bottom surface of the cylindrical base, and an annular guide plate provided on an upper end of the cylindrical base; the annular guide plate is obliquely arranged, and the lower side of the annular guide plate extends to the outer side of the annular opening to be used for guiding out screening materials.

As a further preferable mode of the utility model, the inner cylinder body comprises an inner cylinder body with an open upper end, a discharging pipe which is arranged at the lower end of the inner cylinder body and penetrates through the round hole to extend out of the discharging hole, an outer toothed ring which is arranged on the discharging pipe, a gear which is rotationally connected to the inner bottom surface of the outer cylinder body and meshed with the outer toothed ring, and a motor which is arranged on the outer cylinder body and drives the gear to rotate.

As a further preferred aspect of the present utility model, the screening module includes a truncated cone-shaped screening body formed of a second leg and a screening net; the screening net is arranged obliquely for guiding screening material onto the annular guide plate.

As a further preferable mode of the utility model, the screening module further comprises a positioning column arranged at the upper end of the inner cylinder body and a positioning groove which is arranged at the lower end of the second supporting leg and matched with the positioning column.

As a further preferable mode of the utility model, the spraying module comprises an annular pipe arranged at the upper end of the outer cylinder body, a water inlet pipe and a water outlet pipe which are respectively arranged at two sides of the annular pipe, a water diversion pipe uniformly distributed at the upper end of the annular pipe, and a spraying nozzle which is arranged on the inner wall of the upper end of the outer cylinder body and connected with the water diversion pipe.

As a further preferred aspect of the present utility model, the inner cylinder further includes an annular baffle plate provided on an outer circumferential surface of the inner cylinder body and located at an upper end of a higher side of the annular guide plate.

As a further preferred aspect of the present utility model, the base further includes a groove provided on the bottom surface of the cylindrical base, and a ball rotatably coupled in the groove.

As a further preferred aspect of the present utility model, the screening module further includes a lifting column disposed at an upper end of the truncated cone-shaped screening body.

In summary, the utility model has the following beneficial effects:

according to the utility model, through the optimization mode of the pretreatment separation box, large-quantity and viscous dredging sludge enters different spaces to be synchronously diluted under the screening of the pretreatment separation box, the screening and pre-cleaning effects are achieved in the pretreatment separation box, and the working efficiency of the whole system is improved.

The pretreatment separation box reduces the load of the silt on the parts of the device through separation and dilution of the inner barrel and the outer barrel, accelerates the circulation rate of the silt while avoiding the occurrence of the condition that the parts are pressed and deformed, and improves the efficiency of the device.

The pretreatment separation box does not need to control the size of the inlet amount, is simple and convenient to operate, and has the advantages of strong practicability and wide application range.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a schematic diagram of the structure of the spiral screen, the spray box and the screening box of the utility model.

FIG. 3 is a schematic view of the position distribution of the pretreatment separator tank of the present utility model.

FIG. 4 is a schematic diagram of the pretreatment separator tank of the present utility model.

Fig. 5 is a schematic top view of a portion of the outer cylinder and the inner cylinder of the present utility model.

Fig. 6 is a schematic view of a partial top view of the base of the present utility model.

FIG. 7 is a schematic top view of a portion of an inner barrel of the present utility model.

Fig. 8 is a schematic view of a part of the structure of the base of the present utility model.

Fig. 9 is a schematic top view of a screening module according to the present utility model.

Fig. 10 is a schematic view of a portion of the structure of a screening module according to the present utility model.

Fig. 11 is a schematic view of a partial top view of a spray module of the present utility model.

Description of the drawings: pretreatment separator tank 1, spiral screen 2, feed pipe 21, switching valve 211, horizontal cylinder 22, spiral pushing plate 23, shower pipe 24, filter screen 25, housing 26, driving motor 261, water collection bucket 262, water tank 263, pump body 264, water addition tank 265, water addition pipe 266, shower tank 3, tank 31, shower head 32, screening tank 4, body 41, screen 42, first discharge pipe 43, second discharge pipe 44, outer cylinder 11, outer cylinder body 111, feed inlet 112, discharge outlet 113, annular opening 114, base 12, first leg 121, cylindrical base 122, circular hole 123, annular guide 124, groove 125, ball 126, inner cylinder 13, inner cylinder body 131, discharge pipe 132, outer tooth ring 133, gear 134, motor 135, annular baffle 136, screening module 14, second leg 141, screening net 142, positioning column 143, positioning groove 144, lifting column 145, spray module 15, annular pipe 151, feed inlet 152, outlet 153, water diversion pipe 154, spray nozzle 155.

Detailed Description

Examples

The screening device for dredging sludge recovery provided by the embodiment, as shown in figure 1, comprises a pretreatment separation box 1, a spiral tube screen 2, a spray box 3 and a screening box 4 which are connected in sequence.

As shown in fig. 3, the pretreatment separator tank 1 comprises an outer cylinder 11, a base 12 arranged on the bottom surface of the outer cylinder 11, an inner cylinder 13 arranged on the base 12, a screening module 14 arranged at the upper end of the inner cylinder 13, and a spraying module 15 arranged on the inner wall of the outer cylinder 11.

As shown in fig. 2, the spiral screen 2 includes a housing 26, a feed pipe 21 disposed in the housing 26 and used for receiving the discharged material of the inner cylinder 13, an on-off valve 211 disposed on the feed pipe 21, a horizontal cylinder 22 disposed in the housing 26 and connected with the feed pipe 21, a spiral pushing plate 23 disposed in the horizontal cylinder 22, a driving motor 261 disposed in the housing 26 and located at one side of the horizontal cylinder 22 and connected with the spiral pushing plate 23, and a spray pipe 24 disposed at the upper end of the horizontal cylinder 22, wherein the horizontal cylinder 22 is provided with a filter screen 25, a water collecting bucket 262 is disposed at the lower end of the housing 26, and a vertical projection of the water collecting bucket 262 covers a vertical projection area of the whole filter screen 25. Further, a water tank 263 is disposed at the other side of the housing 26, a water pipe connected to the shower pipe 24 is disposed on the water tank 263, and a pump body 264 is disposed on the water pipe.

The spray box 3 comprises a box body 31 arranged in the shell 26 and connected with a discharge hole of the horizontal cylinder 22, a spray header 32 arranged at the upper end of the box body 31, a liquid adding tank 265 arranged at the upper end of the shell 26, and a liquid adding pipe 266 arranged at the lower end of the liquid adding tank 265, wherein the liquid adding pipe 266 is directly connected with the spray header 32.

The screening box 4 comprises a body 41 connected with the outlet of the box body 31 and a screen 42 arranged in the body 41, wherein the screen 42 is obliquely arranged, the lowest part of the screen 42 is directly connected with a first discharging pipe 43 arranged on the body 41 for discharging screening sand, and a second discharging pipe 44 for discharging cleaning water is further arranged under the screen 42 of the body 41.

The workflow of this embodiment is: (1) When the system operates, dredging mud is directly conveyed to the outer cylinder 11 through a cutter suction dredger, the mud directly falls to a screening module 14 positioned at a feed inlet of the outer cylinder 11 for screening, sundries with the size larger than 90mm in the mud are directly led into the outer cylinder 11 and wait for further discharge, and qualified materials enter an inner cylinder 13 to finish primary screening; while the process is being carried out, the switch valve 211 can be closed, so that the spray module 15 can dilute the sludge on the screening module 14, the sludge in the outer cylinder 11 and the sludge in the inner cylinder 13 simultaneously, thereby reducing the viscosity of the sludge, facilitating the further circulation of the sludge, and avoiding the problem of blockage during primary screening; (2) Qualified materials enter the horizontal cylinder 22 through the feed pipe 21, the spiral pushing plate 23 rotates under the drive of the drive motor 261 to transport sand and stone to the spray box 3, the aperture of the filter screen 25 is 5mm, and under the condition that high-pressure water spray heads distributed on the upper spray pipe 24 wash sludge in the horizontal cylinder 22, a large amount of sludge is washed out to be discharged into a water collecting bucket 262 at the lower end, so that preliminary cleaning is completed; (3) After the cleaning material is sent into the box body 31, the cleaning agent sprayed by the spray header 32 is further used for cleaning, the cleaning agent can be mixed solution formed by mixing disodium ethylenediamine tetraacetate and sodium hydroxide solution, the adding amount is controlled to be 150-200L/h, and the deep cleaning is completed; (4) The cleaning material is fed into the main body 41, is sieved by a sieve 42 (the aperture is 50 mm), is discharged by a first discharging pipe 43 of more than 50mm, is discharged by a second discharging pipe 44 of less than 50mm, and is sieved.

The structure of the pretreatment separator tank 1 is mainly optimized in the embodiment, as shown in fig. 4-11:

the outer cylinder 11 includes an outer cylinder body 111, a feed inlet 112 provided at an upper end of the outer cylinder body 111, a discharge outlet 113 provided at a lower end of the outer cylinder body 111, and an annular opening 114 provided on a side wall of the outer cylinder body 111.

The base 12 comprises a first leg 121 provided on the inner bottom surface of the outer cylindrical body 111, a cylindrical base 122 provided on the first leg 121, a circular hole 123 provided on the bottom surface of the cylindrical base 122, an annular guide plate 124 provided on the upper end of the cylindrical base 122, a groove 125 provided on the bottom surface of the cylindrical base 122, and a ball 126 rotatably connected in the groove 125; the annular guide plate 124 is arranged obliquely and the lower side extends outside the annular opening 114 for guiding out the screened material. The purpose of the annular ring plate 124 is to guide the unqualified materials of screening out of the outer cylinder body 111 by using gravity, recycle the unqualified materials, and after the unqualified materials fall onto the annular guide plate 124, the unqualified materials are not only accelerated to be guided out by flushing of a spraying module, but also have a certain cleaning effect, so that the unqualified materials are convenient to be recycled and re-input into the feed inlet 112; the height of the first leg 121 is greater than the height required for rotation of the outer ring gear 133 and the gear 134, and the size of the circular hole 123 is required to be greater than the outer diameter of the outer ring gear 133 described below, so that sufficient space is ensured for rotation of the outer ring gear 133 and the gear 134; the balls 126 are provided to reduce friction between the bottom surface of the base 12 and the bottom surface of the inner cylinder 13.

The inner cylinder 13 comprises an inner cylinder body 131 with an open upper end, a discharging pipe 132 arranged at the lower end of the inner cylinder body 131 and penetrating through the round hole 123 until extending out of the discharging hole 113, an outer tooth ring 133 arranged on the discharging pipe 132, a gear 134 rotatably connected to the inner bottom surface of the outer cylinder body 111 and meshed with the outer tooth ring 133, a motor 135 arranged on the outer cylinder body 111 and driving the gear 134 to rotate, and an annular baffle 136 arranged on the outer ring surface of the inner cylinder body 131 and positioned at the upper end of the upper side of the annular guide plate 124. The outer gear ring 133 is meshed with the gear 134 and is driven to rotate by the motor 135, so that the inner cylinder 13 can drive the screening module 14 to rotate relative to the base 12 and the outer cylinder 11; the provision of the annular baffle 136 is considered to prevent material and water from entering the base 12, protecting the safe working environment of the lower drive structure.

The screening module 14 comprises a truncated cone-shaped screening body consisting of a second leg 141 and a screening wire 142; the screen mesh 142 is inclined for guiding the screen material onto the annular guide plate 124. The screening module 14 further comprises a positioning column 143 arranged at the upper end of the inner cylinder body 131, a positioning groove 144 arranged at the lower end of the second supporting leg 141 and matched with the positioning column 143, and a lifting column 145 arranged at the upper end of the truncated cone-shaped screening body. As a preferable way of this embodiment, the truncated cone-shaped screening body includes a cylinder, four right-angle triangular plates uniformly distributed on the outer ring surface of the cylinder, and the right-angle sides of the right-angle triangular plates are connected with the cylinder, the inclined sides face the feeding hole 112, and the screening net 142 is fixed on two inclined sides of each adjacent right-angle triangular plate, so that the slope of the screening net 112 is the same as that of the inclined sides of the right-angle triangular plates, and the reject is introduced onto the annular ring plate 124 more quickly, the second supporting leg 141 is composed of the right-angle triangular plates, and the lifting column 145 is a part of the cylinder higher than the right-angle triangular plates, which is provided for improving the installation and disassembly efficiency of the screening module 14 and facilitating maintenance and periodic cleaning.

The spray module 15 comprises an annular pipe 151 arranged at the upper end of the outer cylinder body 111, a water inlet pipe 152 and a water outlet pipe 153 respectively arranged at two sides of the annular pipe 151, a water diversion pipe 154 uniformly distributed at the upper end of the annular pipe 151, and a spray nozzle 155 arranged on the inner wall of the upper end of the outer cylinder body 111 and connected with the water diversion pipe 154.

The embodiment optimizes the structure of the pretreatment separation box, and compared with the prior art, the pretreatment separation box has the advantages that: firstly, the pretreatment separation box can synchronously dilute large-quantity and viscous dredging sludge in different spaces under the screening of the pretreatment separation box, the screening and pre-cleaning effects are achieved in the pretreatment separation box, and the efficiency of the device is improved. Secondly, the pretreatment separation box reduces the load of the silt on the parts of the device through separation and dilution of the inner barrel and the outer barrel, accelerates the circulation rate of the silt while avoiding the occurrence of the compression deformation of the parts, and improves the efficiency of the device. Thirdly, the pretreatment separation box of the device does not need to control the size of the inlet amount, is simple and convenient to operate, and has the advantages of strong practicability and wide application range.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Claims (10)

1. The screening device for dredging sludge recovery is characterized by comprising a pretreatment separation box (1), a spiral tube screen (2), a spray box (3) and a screening box (4); wherein,,

the pretreatment separation box (1) comprises an outer cylinder (11), a base (12) arranged on the bottom surface of the outer cylinder (11), an inner cylinder (13) arranged on the base (12), a screening module (14) arranged at the upper end of the inner cylinder (13), and a spraying module (15) arranged on the inner wall of the outer cylinder (11);

the spiral cylinder screen (2) comprises a feeding pipe (21) for receiving the discharge of the inner cylinder (13), a horizontal cylinder (22) connected with the feeding pipe (21) and a spiral pushing plate (23) arranged in the horizontal cylinder (22), wherein a spray pipe (24) is arranged at the upper end of the horizontal cylinder (22), and a filter screen (25) is arranged on the cylinder of the horizontal cylinder (22);

the spray box (3) comprises a box body (31) connected with the discharge port of the horizontal cylinder body (22) and a spray header (32) arranged at the upper end of the box body (31);

the screening box (4) comprises a body (41) connected with the outlet of the box body (31), and a screen (42) arranged in the body (41).

2. Screening device for dredging sludge recovery according to claim 1, wherein the outer cylinder (11) comprises an outer cylinder body (111), a feed inlet (112) arranged at the upper end of the outer cylinder body (111), a discharge outlet (113) arranged at the lower end of the outer cylinder body (111), and an annular opening (114) arranged on the side wall of the outer cylinder body (111).

3. A dredging sludge recovery screening apparatus according to claim 2, wherein the base (12) comprises a first leg (121) provided on an inner bottom surface of the outer cylindrical body (111), a cylindrical base (122) provided on the first leg (121), a circular hole (123) provided on a bottom surface of the cylindrical base (122), and a ring-shaped guide plate (124) provided on an upper end of the cylindrical base (122); the annular guide plate (124) is arranged obliquely, and the lower side extends to the outer side of the annular opening (114) for guiding out screening materials.

4. A dredging sludge recovery screening apparatus according to claim 3, wherein the inner cylinder (13) comprises an inner cylinder body (131) with an open upper end, a discharging pipe (132) arranged at the lower end of the inner cylinder body (131) and penetrating through the circular hole (123) until extending out of the discharging hole (113), an outer tooth ring (133) arranged on the discharging pipe (132), a gear (134) rotatably connected to the inner bottom surface of the outer cylinder body (111) and meshed with the outer tooth ring (133), and a motor (135) arranged on the outer cylinder body (111) and driving the gear (134) to rotate.

5. Screening device for dredging sludge recovery according to claim 4, wherein the screening module (14) comprises a truncated cone-shaped screening body consisting of a second leg (141) and a screening mesh (142); the screen (142) is arranged obliquely for guiding the screen material onto the annular guide plate (124).

6. Screening device for dredging sludge recovery according to claim 5, wherein the screening module (14) further comprises a positioning column (143) arranged at the upper end of the inner cylinder body (131), and a positioning groove (144) arranged at the lower end of the second leg (141) and matching the positioning column (143).

7. Screening device for dredging sludge recovery according to claim 2, characterized in that the spray module (15) comprises an annular pipe (151) arranged at the upper end of the outer cylinder body (111), a water inlet pipe (152) and a water outlet pipe (153) respectively arranged at two sides of the annular pipe (151), water diversion pipes (154) evenly distributed at the upper end of the annular pipe (151), and spray nozzles (155) arranged on the inner wall of the upper end of the outer cylinder body (111) and connected with the water diversion pipes (154).

8. Screening device for dredging sludge recovery according to claim 4, wherein the inner cylinder (13) further comprises an annular baffle (136) arranged on the outer annular surface of the inner cylinder body (131) at the upper end of the upper side of the annular guide plate (124).

9. Screening device for dredging sludge recovery according to claim 4, wherein the base (12) further comprises a recess (125) provided in the bottom surface of the cylindrical base (122), and balls (126) rotatably connected in the recess (125).

10. Screening device for dredging sludge recovery according to claim 5, wherein the screening module (14) further comprises a lifting column (145) arranged at the upper end of the truncated cone-shaped screening body.