CN222035157U

CN222035157U - Fine sand recovery system

Info

Publication number: CN222035157U
Application number: CN202323284908.3U
Authority: CN
Inventors: 陈泽鑫; 李炀; 陈火城
Original assignee: Xiamen Zhongsha Technology Co ltd
Current assignee: Xiamen Zhongsha Technology Co ltd
Priority date: 2023-11-10
Filing date: 2023-12-04
Publication date: 2024-11-22
Anticipated expiration: 2033-12-04
Also published as: CN221513593U

Abstract

The utility model discloses a fine sand recovery system, which belongs to the field of sand washing equipment, and comprises a plurality of sand washers which are sequentially arranged, wherein the discharge side of the former sand washer is connected with the feed side of the latter sand washer, and each sand washer with wastewater discharge is provided with at least one fine sand sedimentation separator; the fine sand sedimentation separator comprises a sedimentation separation box body, wherein a wastewater inlet and a wastewater outlet are arranged on the sedimentation separation box body, and the wastewater inlet is connected with a wastewater discharge port of a corresponding sand washer with wastewater discharge; the lower part of the sedimentation separation box body is a fine sand sedimentation collection area, a fine sand outlet is arranged on the sedimentation separation box body at the bottom of the fine sand sedimentation collection area, the fine sand outlet is connected with the feeding side of the sand washer or the next sand washer corresponding to the fine sand sedimentation separator through a conveying pipeline, and a sand pump is arranged on the conveying pipeline. The utility model effectively prevents fine sand from losing along with the discharge of wastewater, ensures the quality, reduces the equipment investment and reduces the operation cost.

Description

Fine sand recovery system

Technical Field

The utility model relates to the field of sand washing equipment, in particular to a fine sand recovery system.

Background

Natural sand (namely river sand and sea sand) in the nature generally contains more impurities, machine-made sand also contains impurities such as mud, stone powder and the like, and the impurities can be used only by purifying and removing the impurities to ensure the construction engineering quality. The common method is that sand is added with water and is mechanically elutriated, impurities are dissolved into the water and discharged along with wastewater to obtain qualified sand for construction.

The current method for purifying and washing sea sand, river sand and machine-made sand generally adopts a method for washing sand and water mechanically, and the washing and purifying process generally comprises the following steps: the screening machine, the sand washer and the conveying equipment are combined according to different forms and numbers. The technological process is as follows: coarse particles are removed through screening, water is added into a sand washer (such as a chain bucket type sand washer, a spiral sand washer and a wheel bucket type sand washer for cleaning), sand-water separation is carried out after washing, wastewater is discharged, and sand enters the next cleaning.

As the production line is generally flow production, after sand water enters the sand washer, sand enters the next working procedure along with the rotation of sand washing equipment, and harmful substances are dissolved in the water and discharged along with wastewater. However, due to the agitation of the sand washer, the water can shake vigorously, fine sand can not settle quickly when suspended in the water, and can be discharged along with the wastewater. The discharged wastewater contains a large amount of fine sand, and generally accounts for about 5% -30% of the total sand. After the fine sand is lost, the grading of the sand is discontinuous and unreasonable, and the workability and durability of the concrete can be seriously affected.

In order to solve the problem of fine sand loss in the sand cleaning process, the conventional method is that a unified wastewater collection tank is arranged in a production line, wastewater discharged by each production line is collected in a unified manner, then a silt pump is arranged in the wastewater tank, the silt pump pumps the wastewater containing fine sand and mud into a special cyclone, the wastewater is dehydrated and then is sent to a dewatering screen, the dehydrated fine sand is sent to a finished product sand outlet of the production line and is mixed with the finished product sand, and then the mixed product sand is sent to a finished product storage yard by a conveying belt. Although the fine sand discharged from each process is recovered by this method, the following problems are involved:

1. The dehydrated fine sand is generally mixed at the final product sand outlet of the purification process, so that the recycled fine sand and the product sand are difficult to mix uniformly, and if more mixing equipment and processes are required to be added uniformly, waste and cost increase are caused.

2. The sand cleaning needs multiple times of repeated cleaning to ensure the quality, and the existing process method is to recover the fine sand of multiple processes together, wherein the fine sand of the wastewater collection tank is the mixed sand collected by the wastewater of each cleaning. Some fine sand is cleaned by one step and two or more steps, harmful substances contained on the surface of the fine sand are different in cleanliness and quality, sand grains with different cleanliness are mixed together for dehydration and then mixed with finished sand, and a part of quality of the fine sand is not guaranteed. Particularly in the sea sand cleaning process, a plurality of water elutriation is generally carried out, the cleanliness of sand in each process is greatly different, the process of recovering fine sand by concentrated wastewater is adopted, the finished sand contains fine sand which is not cleaned, and in practice, the product cannot meet the qualified quality requirement, thus hidden danger is left for engineering safety and durability.

3. Because the mixture of fine sand and mud is settled in the wastewater collection tank, the mud and the fine sand are pumped to the fine sand recycling machine together when the sand pump pumps, and the mud and the sand cannot be separated, the fine sand obtained by the fine sand recycling process has higher mud content.

4. The wastewater collection tank needs to be built, equipment and facilities such as a sand pump, a pipeline, a cyclone, a dewatering screen and the like are additionally arranged, so that the investment is large, the operation cost is high, and the investment and the operation cost are increased.

Disclosure of utility model

The utility model provides a fine sand recovery system, which effectively prevents fine sand from losing along with wastewater discharge, ensures quality, reduces equipment investment, reduces investment and reduces operation cost.

The technical scheme provided by the utility model is as follows:

The utility model provides a fine sand recovery system, includes the multichannel sand washer that sets gradually in proper order, and the ejection of compact side of preceding sand washer is connected with the feed side of following sand washer, and the sand after the washing of preceding sand washer gets into following sand washer, and every sand washer that has waste water discharge all is equipped with at least one fine sand sedimentation separator, wherein:

The fine sand sedimentation separator comprises a sedimentation separation box body, wherein a wastewater inlet and a wastewater outlet are arranged on the sedimentation separation box body, and the wastewater inlet of the fine sand sedimentation separator is connected with a wastewater discharge port of a corresponding sand washer with wastewater discharge; the sedimentation separation box is characterized in that the lower part of the sedimentation separation box is a fine sand sedimentation collection area, a fine sand outlet is arranged on the sedimentation separation box at the bottom of the fine sand sedimentation collection area, the fine sand outlet is connected with the feeding side of the sand washer or the next sand washer corresponding to the fine sand sedimentation separator through a conveying pipeline, and a sand pump is arranged on the conveying pipeline.

Further, a baffle plate for increasing the flow passage of the wastewater from the wastewater inlet to the wastewater outlet and/or a blocking device for reducing the flow kinetic energy of the wastewater are arranged in the sedimentation separation box body.

Further, the number of the partition plates is plural, the partition plates and the sedimentation separation box body form a circulation channel from the wastewater inlet to the wastewater outlet, the circulation channel is positioned above the fine sand sedimentation collection area, and the bottom of the circulation channel is communicated with the fine sand sedimentation collection area.

Further, the flow channel extends in a meandering manner in a horizontal direction, or in a meandering manner in a vertical direction, or in a spiral manner in a horizontal direction from the wastewater inlet to the wastewater outlet.

Further, the partition plate is a closed partition plate or an incompletely closed partition plate, the blocking device is a grid or a net sheet, and the blocking device is arranged in the sedimentation separation box body or the circulation channel.

Further, the sand washer includes sand water tank body, reducing gear box body, fine sand subsides recovery box body, rotatory sand impeller and drive arrangement of getting, wherein:

The reduction box body and the sand water tank body are of shell structures with open top ends, the reduction box body is arranged at the front end of the sand water tank body, and the reduction box body is separated from the sand water tank body at the upper part and communicated with the sand water tank body at the lower part;

The rotary sand taking impeller is arranged in the sand water tank body, and a plurality of sand taking water filtering hoppers are circumferentially arranged on the periphery of the rotary sand taking impeller; the rotary sand taking impeller is connected with the driving device and rotates under the driving of the driving device, and the rotary sand taking impeller rotates to the position where the reduction gearbox body is communicated with the lower part of the sand water box body, and the bucket opening of the sand taking water filtering bucket faces the communicated position;

the fine sand sedimentation recovery box body is arranged at the left side and/or the right side of the sand water box body, and is separated from the sand water box body at the upper part and communicated with the sand water box body at the lower part;

The sand water tank body left side and/or right side are provided with the guiding gutter, the guiding gutter with fine sand subsides the recovery box and is linked together at the top, the waste water discharge port sets up on the guiding gutter.

Further, the diversion trench is arranged in a downward inclined way from one end far away from the wastewater discharge port to the wastewater discharge port.

Further, the diversion trench and the fine sand sedimentation recovery box share the same side wall.

Further, the reduction box body is provided with a first slope structure inclined to the lower part of the sand water box body, and the fine sand sedimentation recovery box body is provided with a second slope structure inclined to the lower part of the sand water box body.

Further, the bottom of the side wall of the sand water tank body or the fine sand sedimentation recovery tank body is provided with a water draining and sand discharging opening which can be opened and closed.

Further, the side plate of the reduction box body is higher than the top end of the sand water box body.

Further, an extension section is arranged on the front side of the reduction gearbox body.

Further, a deceleration interference object is arranged in the deceleration box body and/or the extension section.

Further, the rotatory sand impeller of getting is cylindrical structure, get sand filter bowl including the curb plate of left and right sides, be located get sand hopper plate between the curb plate of left and right sides and be located the radial inboard of cylindrical structure filters the water screen, the curb plate of left and right sides, get sand hopper plate and filter screen enclose into the bucket mouth orientation the radial outside of cylindrical structure gets sand filter bowl.

Further, the sand taking hopper plate is inclined towards the front of the rotating direction of the rotating sand taking impeller;

and/or the sand taking hopper plate is bent towards the front of the rotating direction of the rotating sand taking impeller.

Further, overflow ports are formed in the radial outer sides of the cylindrical structures on the side plates on the left side and the right side.

Further, the sand taking water filtering bucket is arranged on the periphery of the rotary sand taking impeller along the circumferential direction in a plurality of circles, the sand taking water filtering buckets of two adjacent circles share one side plate, and a plurality of drain holes are formed in the shared side plate.

Further, the sand-taking water-filtering hoppers of two adjacent circles are aligned or staggered.

Further, the sand taking hopper plate is not provided with holes or provided with a plurality of water filtering holes.

The utility model has the following beneficial effects:

According to the utility model, a fine sand sedimentation separator is arranged for each sand washer, wastewater is introduced into the fine sand sedimentation separator, fine sand discharged along with the wastewater of the sand washer is subjected to sedimentation recovery, the recovered fine sand returns to the sand washer or is mixed with coarse sand in the process, and enters the next sand washer, and wastewater without fine sand is discharged outwards. The utility model can realize fine sand recovery in each process of the sand washer, solves the problem that the wastewater discharged by each process of the sand purification process contains a large amount of fine sand, and effectively prevents the fine sand from losing along with the discharge of the wastewater.

The utility model also changes the prior art that the waste water containing fine sand is uniformly collected, sand-water separation is carried out, the fine sand is sent to the fine sand recovery method of the last step and the finished sand mixing, a special fine sand centralized recovery system is not needed to be arranged, fine sand of each step enters the next step together with coarse sand of the step in the step, the mixing uniformity of coarse and fine sand is good, the existing fine sand centralized recovery of the brought harmful substances and mud is avoided, the quality is ensured, the equipment investment is reduced, the investment is reduced, and the running cost is reduced.

The fine sand sedimentation separator has the advantages of simple structure, small volume, small installed capacity and low operation cost, and can be matched with the existing sand washer. The fine sand sedimentation separator of the utility model replaces the existing concentrated fine sand recovery scheme, and can achieve the effects of investment saving, low operation cost and guaranteeing the quality of sand.

Compared with the existing concentrated fine sand recovery scheme, the fine sand recovery system has the advantages that all sand grains are cleaned identically, the cleanliness of all sand grains can be guaranteed to be identical, the quality of all sand grains is guaranteed to be identical, meanwhile, the investment is low, the operation cost is low, and the system is simple, convenient and has few faults.

Drawings

FIG. 1 is a schematic diagram of an example of a fine sand recovery system of the present utility model;

FIG. 2 is a schematic diagram of another example of a fine sand recovery system of the present utility model;

FIG. 3 is an exemplary illustration of a sand washer of the present utility model;

FIG. 4 is an illustration of an axial side of the sand washer of the present utility model;

FIG. 5 is an exemplary diagram of a reduction box with extension for a sand washer of the present utility model;

FIG. 6 is an exemplary illustration of a reduction box with another type of extension for a sand washer of the present utility model;

FIG. 7 is a left side view of the sand washer of the present utility model;

FIG. 8 is a rear side view of the sand washer of the present utility model;

FIG. 9 is a full cross-sectional view of FIG. 7;

FIG. 10 is a partial cross-sectional view of an outboard sand extraction filter bucket of the rotary sand extraction impeller;

FIG. 11 is a partial cross-sectional view of a central sand extraction filter bucket of the rotary sand extraction impeller;

FIG. 12 is an exemplary diagram of a rotary sand extraction impeller of the sand washer of the present utility model;

FIG. 13 is a diagram of an example of the upper and lower parts of a rotary sand extraction impeller of a sand washer according to the present utility model;

FIG. 14 is an exemplary view of a perforated sand scoop plate of a rotary sand extraction impeller of a sand washer of the present utility model;

FIG. 15 is an exemplary view of a non-porous sand scoop plate of a rotary sand extraction impeller of a sand washer of the present utility model;

Fig. 16 is a side view of fig. 14 and 15;

FIG. 17 is a diagram showing an example of a combined structure of a reduction box, a sand water box, a fine sand sedimentation recovery box, and a diversion trench of the sand washer of the present utility model;

FIG. 18 is another view illustration of the view of FIG. 17;

FIG. 19 is an exemplary diagram of a reduction box with extension combined with the structure of FIG. 17 for a sand washer of the present utility model;

FIG. 20 is an exemplary view of a reduction box with another type of extension combined with the structure of FIG. 17 for a sand washer of the present utility model;

FIG. 21 is an exemplary diagram of a box skeleton of a sand washer of the present utility model;

FIG. 22 is a diagram of an exemplary combination of a reduction box, a matrix support, and a drive connection of the sand washer of the present utility model;

FIG. 23 is an exemplary view of a substrate holder of the sand washer of the present utility model;

FIG. 24 is a diagram of an example grid of a fine sand settling tank of the sand washer of the present utility model;

FIG. 25 is an isometric view of a fine sand sedimentation separator;

FIG. 26 is a schematic top view of FIG. 25;

FIG. 27 is a front view of FIG. 25;

FIG. 28 is an isometric view of a second fine sand sedimentation separator;

FIG. 29 is a top view of FIG. 28;

FIG. 30 is a full cross-sectional view of the front view of FIG. 28;

FIG. 31 is a front view of a third fine sand sedimentation separator;

FIG. 32 is a top view of FIG. 31;

FIG. 33 is an isometric view of a sedimentation separation tank of the fine sand sedimentation separator of FIG. 33;

FIG. 34 is a front view of FIG. 33;

Fig. 35 is an isometric view of fig. 31.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.

The embodiment of the utility model provides a fine sand recovery system which can be suitable for purifying sea sand, river sand and machine-made sand. As shown in fig. 1 to 35, the sand washer 100 comprises a plurality of sand washers 100 which are sequentially arranged in sequence, wherein the sand washer 100 comprises a sand washer with sand washing function and wastewater discharge and a sand washer with sand washing function and no wastewater discharge, and the front sand washer and the rear sand washer are directly connected or connected through a feed channel. The discharge side of the former sand washer is connected with the feed side of the latter sand washer, sand washed by the former sand washer enters the latter sand washer, and each sand washer 100 with wastewater discharge is provided with at least one fine sand sedimentation separator 200, wherein:

The fine sand sedimentation separator 200 comprises a sedimentation separation box 201, wherein the sedimentation separation box 201 is of a shell structure with a closed bottom end and four sides and an open top. The upper part of the box body can be square, rectangular, round or other box bodies, and the lower part of the box body can be a conical structure formed by inclined plates. The sedimentation separation box 201 is provided with a wastewater inlet 202 and a wastewater outlet 203, and the wastewater inlet 202 of the fine sand sedimentation separator 200 is connected with the wastewater discharge port 8 of the corresponding sand washer 100. The wastewater inlet 202 is provided at the front end of the settling separation tank 201 according to the flow direction of wastewater in the settling separation tank 201, and the wastewater outlet 203 is provided at the rear end of the settling separation tank 201, and generally, the wastewater outlet 203 is lower in height than the wastewater inlet 202.

The lower part of the sedimentation separation box body 201 is provided with a fine sand sedimentation collection area 204, a fine sand outlet 205 is arranged on the sedimentation separation box body 201 at the bottom of the fine sand sedimentation collection area 204, and the fine sand outlet 205 can be arranged at the bottommost end of the sedimentation separation box body 201.

The fine sand outlet 205 is connected with the feeding side of the present sand washer or the next sand washer corresponding to the fine sand sedimentation separator 200 through a conveying pipeline 206, and a sand pump 207 is arranged on the conveying pipeline 206.

In the continuous sand washing of the multi-channel sand washer 100, the waste water after each sand washing is discharged from the waste water discharge port 8 of the sand washer 100, and the discharged waste water contains a large amount of fine sand. To achieve this recovery of fine sand, the present utility model provides at least one fine sand settling separator 200 for each sand washer 100. The fine sand-containing wastewater discharged from the sand washer 100 enters the settling separation tank 201 through the wastewater inlet 202 of the fine sand settling separator 200.

After the fine sand-containing wastewater enters the sedimentation separation box body 201 from the wastewater inlet 202, the speed is reduced, sand water slowly flows to the wastewater outlet 203, the sand speed is reduced, the sedimentation speed is accelerated, fine sand is deposited to the bottom, sedimentation separation of fine sand is realized, the wastewater continues to move to the wastewater outlet 203, and finally the wastewater without fine sand is discharged from the wastewater outlet 203. The settled fine sand falls into a fine sand settlement collecting area 204 at the lower part of the settlement separation box 201, is pumped out from a fine sand outlet 205 under the action of a sand pump, is conveyed into the feeding side of the next sand washer through a conveying pipeline 206, and is mixed with sand at the discharging side of the sand washer to enter the next sand washer. Or fed into the feed side of the sand washer through feed line 206 for further cleaning.

In some examples, the settling separation tank 201 may be an entire tank without other separation structures inside. In other examples, to enhance the settling effect of fine sand, a baffle 208 that increases the flow path of wastewater from wastewater inlet 202 to wastewater outlet 203 and/or a blocking device 209 that reduces the kinetic energy of wastewater flow are provided within settling separation tank 201.

Specifically, the number of the partition plates 208 is plural, and the plurality of partition plates 208 and the sedimentation tank 201 form a flow passage 210 from the wastewater inlet to the wastewater outlet, and the flow passage 210 has a meandering, spiral, or the like structure, increasing the length of the flow passage of wastewater from the wastewater inlet 202 to the wastewater outlet 203. The flow-through channel 210 can increase the residence time of wastewater in the settling separation tank 201, which is beneficial for settling separation of fine sand. The flow channel 210 is located above the fine sand sedimentation collection zone 204, and the bottom of the flow channel 210 is communicated with the fine sand sedimentation collection zone 204, ensuring that settled fine sand falls into the fine sand sedimentation collection zone 204.

The blocking device 209 may be a structure such as a grid or mesh, or other shape, a structure in a fixable form or a passive movement form, and when the partition 208 is not included, the blocking device 209 may be directly disposed in the settling separation tank 201, and when the partition 208 is included, the blocking device 209 may be disposed in the circulation channel 210. The blocking device 209 can increase fine sand to be impacted and blocked when wastewater flows, and when moving sand meets the blocking device 209, the kinetic energy is suddenly reduced, so that the effect of accelerating sedimentation separation is achieved.

After the wastewater containing fine sand enters the sedimentation separation box 201, the kinetic energy is reduced and the speed is reduced by the interference of the blocking device 209. Because the density of sand grains is 2.6 tons/cubic meter generally, the density of water is 1 ton/cubic meter, fine sand grains can be quickly settled to the bottom under the condition of low enough flow rate, meanwhile, the sedimentation of sand grains is facilitated under the impact of a baffle and the blocking effect of other blocking matters in the process of moving along with the wastewater from an inlet to an outlet, finally, wastewater without sand grains flows into a discharge port to be discharged outwards, sand grains and part of mud are settled at the bottom, and are conveyed to a sand washer by a sand pump and conveyed to a next stage cleaning process together with other sand, so that the discharged wastewater does not contain fine sand, and the fine sand and other middle coarse fine sand in the sand are conveyed to the next stage process together, thereby achieving the aim of separating the fine sand from the wastewater.

In one example, the flow channel 210 meanders in a horizontal direction from the wastewater inlet 202 to the wastewater outlet 203. Specifically, as shown in fig. 25 to 27, the plurality of partition plates 208 are formed to have the same height, alternately staggered in the front-rear direction (or the left-right direction), and form a horizontal S-like reflux-type flow channel 210, i.e., extending in a meandering manner in the horizontal direction, along which flow channel 210 the wastewater flows from the wastewater inlet 202 to the wastewater outlet 203, and the blocking means 209 is provided in the flow channel 210.

In another example, the flow channel 210 extends helically in a horizontal direction from the wastewater inlet 202 to the wastewater outlet 203. In particular, as shown in FIGS. 28-30, the baffle 208 is spiral-shaped, forming a spiral flow channel 210 from the center outwardly. The waste water inlet 202 is positioned at the center of the spiral flow channel 210, waste water is added from above, the waste water outlet 203 is positioned at the periphery of the spiral flow channel 210, and the waste water flows from the center of the tank body to the outside through the spiral flow channel, and the blocking device 209 is arranged in the flow channel 210. Alternatively, the waste water inlet 202 and waste water outlet 203 may be reversed, with the waste water flowing from the side of the tank through the spiral channel to the central region, and being discharged from the central region channel conduit.

In yet another example, the flow channel 210 meanders in a vertical direction from the wastewater inlet 202 to the wastewater outlet 203. Specifically, as shown in fig. 31-35, the heights of the plurality of baffles 208 are different, the upper parts of the baffles 208 are respectively higher than the liquid level or lower than the liquid level, when the first baffle is higher than the liquid level, the wastewater flows in from the inlet, flows into the area behind the first baffle from the lower part of the first baffle, the upper part of the second baffle is lower than the liquid level, the wastewater enters the area behind the second baffle from the upper part of the second baffle, enters the area behind the third baffle from the lower part of the third baffle, and the like, so as to form a vertical S-shaped like backflow type circulation channel, namely, the backflow type circulation channel extends in a meandering manner in the vertical direction until the last area is formed, and the wastewater outlet 203 is arranged at the side of the tank body of the last area, so as to discharge the wastewater.

In the utility model, the partition board can be a closed partition board, or can be an incompletely closed partition board, such as a grid, a net sheet or other incompletely closed boards, the height of the partition board is not limited, and the partition board can be arranged at will.

The bottom end of the sedimentation separation box 201 can be further provided with a bottom end cleaning opening 211, which is convenient for cleaning and maintenance.

For general sand, the fine sand sedimentation separator 200 of the utility model can be used for cleaning sand and recovering fine sand by matching with a sand washer (such as a chain bucket type sand washer, a spiral sand washer, a wheel bucket type sand washer and the like) in the prior art.

For sand with high mud content or small fineness modulus, the fine sand sedimentation separator 200 of the utility model is matched with a chain bucket type sand washer, a spiral sand washer, a wheel bucket type sand washer and the like in the prior art, so that the fine sand can not be completely recovered, and the sand washer 100 with the fine sand recovery function is matched with the fine sand sedimentation separator 200 for use, and one fine sand sedimentation separator 200 is arranged for each sand washer 100.

For sea sand having a particularly high mud content, such as dredging sea sand, the fine sand settling separator 200 and the sand washer 100 having a fine sand recovery function of the present utility model may be employed, and a plurality of fine sand settling separators 200 may be provided for each sand washer 100 and used in series.

When the sand washing machine in the prior art washes sand, sand and water directly enter the sand washing machine, the sand and water enter the sand washing machine in production practice, the sand washing machine has high speed, the sand water inlet has certain height, the sand water quickly falls into the sand washing equipment, the high-speed sand water and the height difference of the inlet enable the sand water to enter the sand washing equipment, the sand water is in a state with large kinetic energy, coarse sand can settle to the bottom under the action of self gravity, fine sand can float in the water, and particularly when the mud content of raw sand is high, the settlement of the fine sand is slower, even middle sand cannot settle, and the fine sand is discharged outwards. On a continuous production line, sand water of the last step continuously enters, and is mechanically stirred by the equipment, the sand water is in a state of intense fluctuation all the time in a sand water tank body, a large amount of fine sand, sand grains with the diameter of less than 1mm, particularly with the particle size of less than 0.315mm, are in a state of being suspended in water all the time, and sand sediment with the large particle size is taken out by the equipment and sent to the next step, and the fine sand suspended in the water is discharged together with wastewater to run off.

According to the sand sedimentation principle, on one hand, the sand sedimentation is related to the particle size of the sand, coarse particles are easy to sediment, fine particles are not easy to sediment, meanwhile, the sand sedimentation speed is also related to the stability of water, and the sand sedimentation speed is faster in a static state. The grain size of fine sand is small, the weight is light, and the disturbance of water can change the direction of motion of fine sand, so in the water of fluctuation, fine sand can not effectively subside, can discharge along with waste water. The sedimentation rate of sand is also related to the viscosity of water, the raw sand generally contains mud, the mud content of the raw sand is generally between 3% and 20%, during the cleaning process, the water and mechanical stirring function, the mud is dissolved in the water, the viscosity of the mud-containing water is increased, the sedimentation rate of sand is hindered, and particularly fine sand is more difficult to sediment in wastewater with higher viscosity, so the fine sand is easy to discharge together with the wastewater. If the fine sand cannot be effectively recovered, the washed sand grain composition can cause fault phenomenon due to the lack of the fine sand, and the lack of the fine sand finished sand can cause poor workability of concrete, bleeding easily, unreasonable sand composition, failure in realizing the closest packing, and larger influence on the strength and durability of the concrete.

Based on the above problems, the sand washer of the present utility model, as shown in fig. 1-22, comprises a sand water tank 1, a reduction box 2, a fine sand sedimentation recovery box 6, a rotary sand taking impeller 3 and a driving device 4, all of which are arranged on a machine body bracket 19, wherein:

The reduction gearbox body 2 and the sand water box body 1 are shell structures with open tops. The sand tank 1 may be square, rectangular or other alternative shapes, or may be provided with reference to a sand washer of the prior art, and the present utility model is not limited thereto. The reduction box 2 has a square or rectangular or other shaped opening as an inlet for sand and water, and has a four-sided closed shape.

The reduction box body 2 is arranged at the front end of the sand water tank body 1, and the reduction box body 2 is separated from the upper part of the sand water tank body 1 and is not communicated with the upper part of the sand water tank body, but is communicated with the lower part of the sand water tank body.

When sand washing, when sand water gets into the sand washer, wash into reduction box 2 from the eminence down, sand water kinetic energy is big when getting into reduction box 2, fine sand suspension is in waste water, mix with a large amount of fine sand in the water, through the separation closure of reduction box 2 lateral wall all around, reduce kinetic energy rapidly, become quiet, sand after reducing kinetic energy piles up in reduction box 2's lower part, when reaching certain height, slide entering sand water tank 1 from the lower part more gently with the state of low kinetic energy. The water with the kinetic energy reduced also smoothly enters the sand water tank body 1, so that the sand water in the sand water tank body 1 is in a stable state, and the sedimentation of fine sand is facilitated. Moreover, as the reduction box body 2 is communicated with the sand water tank body 1 only at the lower part, the disturbance of the sand water in the reduction box body 2 to the sand water in the sand water tank body 1 is reduced.

The rotary sand taking impeller 3 is arranged in the sand water tank body 1, and a plurality of sand taking water filtering hoppers 5 are circumferentially arranged on the periphery of the rotary sand taking impeller 3. The rotary sand taking impeller 3 is connected with the driving device 4 and is driven by the driving device 4 to rotate. The driving device 4 consists of a speed reducer, a transmission connecting device, a motor and a control system.

When the rotary sand taking impeller 3 rotates, the rotary sand taking impeller rotates to the position where the mouth of the sand taking water filter bucket 5 at the position where the reduction box body 2 is communicated with the lower part of the sand water tank body 1 faces to the communication position, sand (together with water) which enters the sand water tank body 1 and sinks to the bottom is taken into the sand taking water filter bucket 5, water is filtered, the rear end of the sand water tank body 1 is the sand unloading position of the rotary impeller, and after the sand taking water filter bucket 5 rotates to the rear end, the filtered sand in the sand taking water filter bucket 5 automatically falls into the next procedure.

The rotation speed of the rotating sand taking impeller 3 in the sand water tank body 1 is generally about 0.7-2 revolutions per minute, so that the water in the sand water tank body 1 is slightly disturbed, the sedimentation of fine sand is influenced to a certain extent, and part of fine sand is mixed in the waste water.

In order to solve the problems, the utility model is provided with the fine sand sedimentation recovery box body 6 at the left side and/or the right side of the sand water box body 1, the fine sand sedimentation recovery box body 6 is separated from the sand water box body 1 at the upper part by a partition plate, sand water is not communicated, a part of the middle area can use a closed partition plate or a part of the middle area can use a grid 22 to be communicated at the lower part, thus stirring when the sand water box body 1 rotates an impeller to take sand can be very effectively limited in the sand water box body 1. The left side and/or the right side of the sand water tank body 1 are/is provided with a diversion trench 7, and the diversion trench 7 is communicated with the fine sand sedimentation recovery tank body 6 at the top.

The waste water containing less fine sand flows into the fine sand sedimentation recovery box body 6 from the lower part of the sand water box body 1 quietly, the waste water rises from the bottom, the density of the water is small and is easy to rise, the waste water is discharged into the diversion trench 7 from the upper part of the fine sand sedimentation recovery box body 6, the diversion trench 7 is provided with a waste water discharge port 8, and the waste water is discharged from the waste water discharge port 8. The density of the fine sand is greater than that of water, the fine sand can be settled only when the fine sand rises to a certain height, the settled fine sand slides into the sand water tank body 1 from the bottom and is mixed with the sand at the bottom of the sand water tank body 1, and the fine sand is taken out and sent to the next passage by the rotary sand taking impeller.

The sand washing machine can quickly reduce the kinetic energy of sand water through the reduction box body, so that the sand water can keep a stable and quiet state in the sand water box body, a space in which fine sand can fully settle is created, and the fine sand is settled and recovered through the fine sand settlement recovery box body. The device can separate sand from water of coarse sand, can also enable fine sand to be fully settled and separated from wastewater, wastewater is discharged outwards, fine sand and coarse sand are taken out together and sent to the next stage, the coarse sand and the fine sand can be cleaned in the same sand washer, the discharged wastewater does not contain fine sand, and the fine sand self-recovery function is realized. The sand purifying and cleaning process system composed of the utility model can effectively prevent fine sand from losing along with wastewater discharge, does not cause fine sand loss, does not need to be provided with a special fine sand centralized recovery system, ensures that fine sand of each process enters the next process together with coarse sand of the process, has good mixing uniformity of coarse and fine sand, avoids the problem that fine sand is concentratedly brought back into harmful substances and mud, ensures quality, reduces equipment investment, reduces investment and reduces operation cost.

Further, the upper partition plate between the fine sand sedimentation recovery box body 6 and the sand water box body 1 is a totally-enclosed plate, the totally-enclosed part must go deep below the liquid surface of the sand water box body 1 and can be adjusted according to the impurity condition of sand, and the lower enclosed plate of the partition plate can also partially use grid.

The utility model divides the whole box body of the sand washer into three areas with the upper parts not communicated with each other and the lower parts communicated with each other, namely a sand water box body 1, a reduction box body 2 and a fine sand sedimentation recovery box body 6. Through the setting in three region, accomplish the rapid and effective reduction to entry sand kinetic energy by reducing gear box 2, get sand by sand water tank 1, the waste water rethread fine sand that contains a small amount of fine sand subsides the subsidence collection of retrieving box 6, fine sand subsidence is retrieved box 6 top exhaust water and is not contained fine sand basically, guaranteed this novel sand washer effectively and realized the self-recovery of fine sand for fine sand is not discharged outward, and fine sand and coarse sand are all accomplished the washing in same way.

The fine sand sedimentation recovery box body 6 and the diversion trench 7 share the same side wall, and the upper end of the shared side wall is provided with an overflow opening 9. The overflow opening 9 may be an opening, or may be a top slot, etc., and the waste water flows into the diversion trench 7 from the overflow opening 9. The overflow opening 9 keeps the water level of the sand tank body stable at a certain height, and the overflow opening 9 can be provided with a grid to further prevent small amounts of fine sand from being discharged occasionally. Of course, the overflow opening 9 may not be provided, and the waste water directly enters the diversion trench 7 beyond the top end of the shared side wall.

The fine sand sedimentation recovery box body 6 can be a shell structure with an open upper end or a shell structure with a closed upper end, and when the upper end is closed, an overflow opening 9 is required to be arranged on the side surface.

The diversion trench 7 is arranged from one end far away from the wastewater discharge opening 8 to the wastewater discharge opening 8 in a downward inclined way, so that the mud in the wastewater is prevented from precipitating in the diversion trench 7.

The reduction box body 2 is provided with a first slope structure 10 which inclines towards the lower part of the sand water tank body 1, so that sand water can conveniently slide into the sand water tank body 1. The fine sand sedimentation recovery box body 6 is provided with a second slope structure 11 which inclines towards the lower part of the sand water box body 1, so that fine sand can conveniently sediment into the sand water box body 1. The outer side plate of the fine sand sedimentation recovery box body 6 is arranged vertically or obliquely or partially arranged vertically or partially obliquely. When in an inclined or partially inclined arrangement, the inclined outer side forms the second ramp structure 11.

The bottom of the side wall of the sand water tank body 1 or the fine sand sedimentation recovery tank body 6 is provided with a water draining and sand discharging opening which can be opened and closed. The device is used for thorough emptying, overhauling and the like. The water and sand draining port may be one water draining flange and one water draining gate valve.

The side plate of the reduction box body 2 is higher than the top end of the sand water tank body 1, so that the sand water at the inlet can be effectively prevented from splashing outwards, and the sand water with large kinetic energy is restrained in the reduction box body. The upper end of the side plate of the reduction box body 2 is closed, the lower end of the side plate of the reduction box body 2 is communicated with the sand water tank body 1, and the closed part of the side plate of the reduction box body 2 is deep below the liquid level of the sand water tank body 1. The three sides of the inlet are sealed to the bottom of the sand water tank body, one side communicated with the sand water tank body 1, the upper part is of a sealed structure, sand water of the sand water tank body 1 and the reduction box body 2 is isolated, but the lower part is communicated, the sand water enters from the inlet of the reduction box body 2, and enters the bottom of the sand water tank body 1 from the lower part of the reduction box body 2.

The front side of the reduction box 2 may be provided with an extension 20 for providing a longer space for sand water reduction. A reduction interference 21 can be arranged in the reduction gearbox body 2 and/or the extension section 20 to reduce the sand water kinetic energy. The obstacle can be a steel bar grating or various shapes or various obstacles made of other materials, which can reduce the kinetic energy of sand water, and the obstacle is preferably arranged at the upper part of the inlet of the reduction gearbox 2.

The kinetic energy of sand water when entering the reduction gearbox body 2 is very big, and through the effect of interference thing, the kinetic energy of sand water reduces by a wide margin, and the high kinetic energy sand water of violent fluctuation is restrained in reduction gearbox body 2 within range to the structure of closed all around, does not influence sand water tank body 1 and fine sand sedimentation recovery box body 6, and after the effect of interference, the kinetic energy of entry sand water reduces rapidly, changes low kinetic energy state, gets into sand water tank body 1 from the lower part of reduction gearbox body 2. The upper parts of the speed reduction box body 2 and the sand water tank body 1 are separated and not communicated, so that the sand water of the sand water tank body 1 cannot be disturbed by the sand water kinetic energy of the speed reduction box body 2, the sand water entering the sand water tank body 1 is low in kinetic energy and slow and quiet, the quiet state is favorable for settling of fine sand, conditions are created for settling of the fine sand and separation of wastewater, and the fine sand content in the wastewater is greatly reduced.

The sand water tank body 1, the reduction box body 2 and the fine sand sedimentation recovery box body 6 are of an integral structure and are formed by welding steel plates. The integral structure is arranged on a box body framework, and the box body framework is formed by combining steel materials such as channel steel, I-steel and the like. The sand water tank body is formed by splicing steel plates.

The rotary sand taking impeller 3 is of a cylindrical structure, the sand taking water filter bucket 5 comprises side plates 12 and 13 on the left side and the right side, a sand taking bucket plate 14 positioned between the side plates 12 and 13 on the left side and the right side, and a water filtering screen 15 positioned between the side plates 12 and 13 on the left side and the right side and positioned on the radial inner side of the cylindrical structure, and the side plates 12 and 13 on the left side and the right side, the sand taking bucket plate 14 and the water filtering screen 15 form the sand taking water filter bucket 5 with bucket openings facing the radial outer side of the cylindrical structure. The sand-taking water filtering bucket is used for excavating sand in the sand-taking water tank body, and the excavated sand is sent out of the sand-taking water tank body to enter the next passage through rotation.

The rotary sand-taking impeller 3 can be manufactured integrally. In order to increase the time from the sand hopper to sand unloading when the sand hopper leaves the water surface, the rotating speed of the rotating impeller is low, the diameter of the impeller is large, and the diameter of the rotating sand taking impeller is generally between 4 meters and 6 meters. The long-distance transportation is inconvenient, so that the impeller can be manufactured by being divided into an upper part and a lower part. When in installation, the upper and lower impellers are spliced into a whole on site. The problem of ultrahigh road transportation can be solved, and the transportation cost from a manufacturer to an installation site is reduced.

The side plates 12, 13 on the left and right sides are arc-shaped, and the water filtering screen 15 is arranged on one side of the inner diameter of the rotary impeller, and can be integrally or multi-piece or single-piece. The sand taking plate 14 may be rectangular, and the sand taking plate 14 may be inclined toward the front of the rotation direction of the rotary sand taking impeller 3, i.e., the sand facing surface of the sand taking plate 14 is inclined toward the front.

And/or the sand scoop plate 14 may be bent toward the front of the direction of rotation of the rotary sand take-out impeller 3. The sand facing surface can be bent at a certain angle, which is beneficial to increasing the overall rigidity of the sand taking hopper, and is also beneficial to digging sand in the box body, and the blanking angle can be increased during sand discharging, so that the blanking is more smooth.

Overflow ports 16 are formed in the left and right side plates 12, 13 on the radial outer side of the cylindrical structure. After the sand in the sand taking water tank body is excavated by the sand taking hopper, the water in the part, which is not full of the sand, in the sand taking hopper is rapidly discharged from the circular arc openings on the two sides when the water leaves the liquid surface of the sand water tank body along with the rotation of the impeller, and the water on the sand surface is not required to be discharged to the filter screen through the sand in the sand taking hopper, but rapidly flows out of the circular arc openings directly and rapidly, so that the water content of the sand entering the next stage is reduced. Namely, water higher than the sand surface in the sand taking hopper is rapidly discharged from the overflow port 16 on the side surface, and the rest of water is discharged from the bottom water filtering screen, so that the water content of the sand is effectively reduced. The overflow port 16 may be circular arc-shaped, may be in other shapes, and may be additionally provided with a mesh grid.

The sand taking plate 14 can be a non-porous flat plate or a plurality of water filtering holes 17 are distributed, and the water filtering holes 17 are round or long-strip-shaped.

The sand taking water filtering hoppers 5 can be arranged along the circumference of the rotary sand taking impeller 3 in a plurality of circles, namely, one group, two groups, three groups, four groups or more groups can be arranged in the radial direction of the main shaft, the sand taking water filtering hoppers 5 of two adjacent circles share one side plate, a plurality of water draining holes 18 are formed in the shared side plate, and the water in the middle sand taking hoppers is discharged. The sand-taking water-filtering hoppers 5 of two adjacent circles are aligned or staggered.

The water screen 15 may be an integral one-piece water screen or may be mounted in a plurality of pieces or one per bucket. When the integral screen is installed, through the through holes formed in the side plates, the integral screen is fixedly installed by means of steel bar positioning, or the integral screen is fixedly installed by means of Q235 through long bolts and nuts, or stainless steel through long bolts and nuts positioning.

While the foregoing is directed to the preferred embodiments of the present utility model, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present utility model, and such modifications and adaptations are intended to be comprehended within the scope of the present utility model.

Claims

1. The utility model provides a fine sand recovery system, its characterized in that, includes the multichannel sand washer that sets gradually in proper order, and the ejection of compact side of preceding sand washer is connected with the feeding side of following sand washer, and the sand after the washing of preceding sand washer gets into following sand washer, and every sand washer that has waste water emission all is equipped with at least one fine sand sedimentation separator, wherein:

2. The fine sand recovery system according to claim 1, wherein a partition plate for increasing a flow passage of wastewater from the wastewater inlet to the wastewater outlet and/or a blocking device for reducing a flow kinetic energy of wastewater are provided in the sedimentation separation tank.

3. The fine sand recovery system of claim 2 wherein the number of baffles is a plurality, the plurality of baffles and the sedimentation tank form a flow channel from the wastewater inlet to the wastewater outlet, the flow channel is above the fine sand sedimentation collection zone, and the flow channel bottom is in communication with the fine sand sedimentation collection zone.

4. A fine sand recovery system according to claim 3, wherein the flow channel meanders in a horizontal direction, or meanders in a vertical direction, or spirals in a horizontal direction from the waste water inlet to the waste water outlet.

5. The fine sand recovery system of claim 4, wherein the partition is a closed partition or an incompletely closed partition, the blocking device is a grid or mesh, and the blocking device is disposed in the sedimentation separation tank or the flow channel.

6. The fine sand recovery system of any one of claims 1-5, wherein the sand washer comprises a sand tank, a reduction box, a fine sand sedimentation recovery box, a rotary sand taking impeller, and a drive device, wherein:

7. The fine sand recovery system of claim 6, wherein the diversion trench is disposed at a downward incline from an end remote from the wastewater discharge port to the wastewater discharge port.

8. The fine sand recovery system of claim 6, wherein the diversion trench and the fine sand settling recovery tank share a common sidewall.

9. The fine sand recovery system of claim 6, wherein the reduction box is provided with a first slope structure inclined to a lower portion of the sand water box, and the fine sand settling recovery box is provided with a second slope structure inclined to a lower portion of the sand water box.

10. The fine sand recovery system according to claim 6, wherein an openable and closable water and sand draining port is provided on the bottom of the side wall of the sand tank body or the fine sand sedimentation recovery tank body.

11. The fine sand recovery system of claim 6, wherein the side panels of the reduction box are higher than the top end of the sand tank.

12. The fine sand recovery system of claim 6, wherein the reduction box body front side is provided with an extension section.

13. The fine sand recovery system of claim 12, wherein a deceleration obstruction is disposed within the deceleration tank and/or the extension.

14. The fine sand recovery system of claim 6, wherein the rotary sand taking impeller is of a cylindrical structure, the sand taking water filter bucket comprises a side plate on the left side and the right side, a sand taking bucket plate positioned between the side plates on the left side and the right side, and a water filtering screen positioned between the side plates on the left side and the right side and positioned on the radial inner side of the cylindrical structure, and the side plates on the left side and the right side, the sand taking bucket plate and the water filtering screen enclose a bucket opening towards the radial outer side of the cylindrical structure.

15. The fine sand recovery system of claim 14 wherein the sand scoop plate is inclined forward of the direction of rotation of the rotating sand scoop wheel;

16. The fine sand recovery system of claim 14, wherein the left and right side plates are provided with overflow ports radially outward of the cylindrical structure.

17. The fine sand recovery system according to claim 16, wherein the sand taking and filtering water hoppers are circumferentially arranged on the periphery of the rotary sand taking impeller in a plurality of circles, the sand taking and filtering water hoppers of two adjacent circles share a side plate, and a plurality of water drainage holes are formed in the shared side plate.

18. The fine sand recovery system of claim 17 wherein the sand removal filter hoppers of adjacent turns are aligned or staggered.

19. The fine sand recovery system of claim 14 wherein the sand scoop plate is free of openings or is provided with a plurality of drainage holes.