CN212375056U - One-stop foundation pit soil treatment system - Google Patents

One-stop foundation pit soil treatment system Download PDF

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Publication number
CN212375056U
CN212375056U CN202020540609.9U CN202020540609U CN212375056U CN 212375056 U CN212375056 U CN 212375056U CN 202020540609 U CN202020540609 U CN 202020540609U CN 212375056 U CN212375056 U CN 212375056U
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Prior art keywords
slurry
sand
foundation pit
washing
screen
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CN202020540609.9U
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Inventor
梁淇垵
雷斌
谢思可
季婷婷
沙桢晖
胡长强
陈小慧
王志权
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Shenzhen Gongkan Geotechnical Group Co Ltd
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Shenzhen Gongkan Geotechnical Group Co Ltd
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Abstract

The utility model discloses a foundation pit soil one-stop processing system, which belongs to the field of waste residue soil processing of foundation pit earthwork excavation and comprises a washing and filtering system and a squeezing system, wherein the washing and filtering system is used for separating foundation pit soil to form clean sand and slurry, and the squeezing system is used for separating slurry to form mud cakes and clean water; the washing and filtering system comprises a rotary screen, a plurality of groups of sand washers for receiving fine materials screened by the rotary screen, a dewatering screen for separating clean sand with water, and a mud box for storing mud generated by the sand washers; the squeezing system comprises a slurry storage barrel which is connected with the pipeline of the slurry tank and is used for separating slurry, and a squeezer which squeezes the slurry separated by the slurry storage barrel into a mud cake and water; the problems that municipal pipe network blockage and environmental pollution often occur due to the fact that foundation pit soil generated in the construction process occupies a large amount of land resources and is discharged in a mess are solved.

Description

One-stop foundation pit soil treatment system
Technical Field
The utility model relates to a foundation ditch earthwork excavation abandonment dregs field of handling especially relates to a foundation ditch soil one-stop formula processing system.
Background
At present, in the excavation process of a building foundation pit, a large amount of waste earthwork needs to be transported and treated. As for the disposal method of the waste earthwork, a commonly used disposal method at present is to use a mud-headed vehicle to transport the waste earthwork to a designated waste earthwork storage site outside the site for stacking.
However, as the earth volume of the storage yard increases, a large amount of land resources are occupied, and if the storage yard is not operated properly, a series of environmental and safety problems are caused; in addition, because appointed storage area is few, and the transportation team is not standard, the indiscriminate discharge phenomenon of ubiquitous discarded earthwork leads to taking place municipal pipe network jam and environmental pollution scheduling problem often.
Disclosure of Invention
In order to overcome prior art not enough, the utility model provides a foundation ditch soil one-stop type processing system aims at solving extravagant soil resources in the foundation ditch earthwork treatment methods commonly used at present, area is limited, economic nature is poor, polluted environment scheduling problem.
The utility model provides a technical scheme that its technical problem adopted is:
a one-stop foundation pit soil treatment system comprises a washing and filtering system and a squeezing system, wherein the washing and filtering system is used for separating foundation pit soil into clean sand and slurry, and the squeezing system is used for separating the slurry into a slurry cake and clean water;
the washing and filtering system comprises a rotary screen, a plurality of groups of sand washers for receiving fine materials screened by the rotary screen, a dewatering screen for separating clean sand with water, and a mud box for storing mud generated by the sand washers;
the squeezing system comprises a slurry storage barrel which is connected with a slurry tank pipeline and is used for separating slurry, and a squeezer which squeezes the slurry separated by the slurry storage barrel into a mud cake and water.
By adopting the technical scheme, firstly, the drum screen is utilized to primarily screen the foundation pit soil, coarse materials with the particle size larger than 10mm and fine materials with the particle size smaller than or equal to 10mm are formed by screening, the coarse materials are transported to a designated place for further processing, and the fine materials are screened into a sand washer for washing and screening; washing the fine materials by a sand washer to form water-carrying clean sand and slurry, vibrating and dehydrating the water-carrying clean sand by a dehydration sieve, and finally conveying the water-carrying clean sand to a sand piling field by a conveying belt; the slurry is stored in a slurry storage barrel, a flocculating agent is added into the slurry storage barrel, large granular solid matters in the slurry are adsorbed together under the action of the flocculating agent and are separated from the solvent water to form a solid-liquid mixed phase; and then, the separated mud in the mud storage barrel is pumped to a squeezer through a mud pump and other devices for squeezing treatment to form mud cakes and purified water, the purified water can be recycled on site, for example, for sand washing of a sand washer, the water content of the mud cakes after the squeezing treatment is about 20%, the grains of the mud cakes are fine, the mud cakes can be directly transported to a processing plant by a special vehicle to be pressed into environment-friendly bricks and the like, and the harmless recycling treatment of the waste mud is completely realized.
Preferably, the washing and filtering system further comprises a cyclone arranged on a connecting pipeline between the slurry tank and the slurry storage barrel, and the slurry is separated into separated materials with the particle size not smaller than 4mm by the cyclone before being sent to the slurry storage barrel, and the separated materials are conveyed back to the sand washer.
By adopting the technical scheme, before the slurry in the slurry tank is pumped into the slurry storage barrel, the slurry is firstly separated by the cyclone, the cyclone screens the separated material with the particle size larger than or equal to 4mm in the slurry mixed liquid by utilizing the centrifugal sedimentation principle, the separated material is prevented from damaging the filter cloth of the squeezer in the subsequent squeezing process operation, and the screened separated material enters the sand washer again to be cleaned and discharged.
Preferably, the dewatering screen comprises a screen box, a vibration exciter, a supporting system and a motor, wherein a base bottom groove is formed in the bottom of the screen box and is connected with the rotary screen through a pipeline.
Through adopting above-mentioned technical scheme, the dewatering screen will take water net sand vibrations to separate and form water and net sand, rivers advance in the frame kerve and net sand is carried to the sand piling yard by the drive belt, and the water of frame kerve can pass through the pipeline transport to the drum sieve in, handles the water resource after the dehydration on the one hand, and on the other hand handles the granule that still exists in the aquatic.
Preferably, the drum screen comprises a screen drum and a feeding hopper, and the screen drum and the feeding hopper are both obliquely arranged; the feeding hopper is provided with at least two high-pressure water guns with outward pipe orifices; spray sets are all installed to the both sides of a sieve section of thick bamboo, spray sets spray water towards a sieve section of thick bamboo is inside.
Through adopting above-mentioned technical scheme, a sieve section of thick bamboo and the equal slope setting of income hopper are for the convenience of unloading, locate to install high-pressure squirt at going into the hopper, can tentatively moisten and break up large-scale cubic foundation ditch soil, and the spray set of both sides is used for moistening and breaking up large-scale cubic foundation ditch soil at the rotatory in-process of a sieve section of thick bamboo.
Preferably, the number of the pulp storage barrels is two, and the two pulp storage barrels are communicated through a pipeline.
Through adopting above-mentioned technical scheme, increaseed the storage capacity of mud, reduced the frequency that adds the flocculating agent and carry out the coagulation reaction from this, improve the mud volume of handling each time to when mud volume is too much in a mud storage bucket, can flow into in another mud storage bucket.
The utility model has the advantages that:
1. one-stop treatment of washing, filtering and squeezing
The utility model adopts two sets of treatment systems of washing and filtering and squeezing, the washing and filtering system generates clean sand and mud through washing and filtering the foundation pit soil, and then adopts the squeezing system to convert the mud into clean water and mud cakes, the one-stop treatment technology has the advantages of thorough integral treatment process, high degree of harmlessness and good effect;
2. high processing capacity
The washing and filtering system and the squeezing system of the utility model can set corresponding matching quantity according to factors such as the area size of the site, the excavation capacity, the construction period requirement and the like, and can set a plurality of processing assembly lines simultaneously; the system can continuously work after being started and has strong processing capacity.
3. Simple processing operation
The utility model utilizes the processing equipment which adopts streamlined operation, the mechanical automation degree is high, the operation is simple and convenient, the cycle processing time is short, and the number of field operators is 2-3, thus meeting the requirements;
4. the economic benefit is remarkable
The utility model converts the foundation pit soil into clean sand, mud cake and purified water after washing, filtering and squeezing treatment, the clean sand and the purified water can be fully reused, and the renewable resources create remarkable economic benefit;
5. significant resource saving effect
The utility model treats foundation pit soil on site, avoids occupying large area of foundation pit soil yard, saves a large amount of planning land for city; the formed clean sand can effectively make up for the shortage of sand materials in the building market and reduce the unregulated exploitation; the mud cakes can be transported to a processing plant to be pressed into environment-friendly bricks, so that land excavation can be reduced; the purified water can be used for construction, cleaning, car washing and the like on site, a large amount of water resources are saved, and social benefits of the resource-saving treatment technology are remarkable;
6. green environmental protection pollution-free
The utility model discloses a processing technology handles foundation ditch soil for renewable cyclic utilization's sand, mud cake, water on the spot of construction, and overall process one-stop innocent treatment has significantly reduced the outward transport waste volume, has reduced the mud head car transportation volume, has avoided the vehicle polluted environment and has occupied the town road, and green is pollution-free.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic structural view of a one-stop treatment system for foundation pit soil of the present invention;
fig. 2 is a flow chart of the one-stop treatment method for the medium foundation pit soil of the present invention.
The reference numerals in the figures are explained below:
1. foundation pit soil; 2. cleaning sand; 3. mud cakes; 4. a drum screen; 5. washing a sand machine; 6. dewatering screen; 601. a base bottom groove; 7. a conveyor belt; 8. a mud tank; 9. a swirler; 10. a pulp storage barrel; 11. a press; 12. and (7) a water reservoir.
Detailed Description
The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention. In addition, all the connection/connection relations referred to in the patent do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection auxiliary components according to specific implementation conditions. The utility model discloses each technical feature in the creation can the interactive combination under the prerequisite that does not contradict conflict each other.
The method aims to solve the problems of municipal pipe network blockage and environmental pollution caused by 'occupation of a large amount of land resources' and 'waste earthwork random discharge' generated in the existing construction process.
The utility model provides a through washing the processing system who strains, squeeze the processing foundation ditch soil and processing method, wash the foundation ditch excavation earthwork and strain, squeeze, realize solid-liquid separation innocent treatment, convert abandonment dregs into the green of clean sand, colourless water, plastic mud cake.
A one-stop foundation pit soil treatment system is shown in figures 1 and 2 and comprises a washing and filtering system and a squeezing system, wherein the washing and filtering system is used for separating foundation pit soil 1 into clean sand 2 and slurry, and the squeezing system is used for separating the slurry into a mud cake 3 and clean water.
The washing and filtering system comprises a rotary screen 4, a plurality of groups of sand washers 5 for receiving fine materials screened by the rotary screen 4, a dewatering screen 6 for separating water-bearing clean sand, and a mud tank 8 for storing mud generated by the sand washers 5; the pressing system comprises a slurry storage barrel 10 which is connected with the slurry tank 8 through a pipeline and is used for separating slurry, and a presser 11 which presses the slurry separated by the slurry storage barrel 10 into a mud cake 3 and water.
The specific working principle is as follows: firstly, primarily screening foundation pit soil 1 by using a drum screen 4, screening to form coarse materials with the particle size of more than 10mm and fine materials with the particle size of less than or equal to 10mm, transporting the coarse materials to a specified place for further processing, and screening the fine materials into a sand washer 5 for washing and screening; washing and screening the fine materials by a sand washer 5 to form water-carrying clean sand and slurry, vibrating and dehydrating the water-carrying clean sand by a dehydration screen 6 to form clean sand 2, and finally conveying the clean sand 2 to a sand piling field by a conveying belt 7; the slurry is stored in a slurry storage barrel 10, a flocculating agent is added into the slurry storage barrel 10, large-particle solid matters in the slurry are adsorbed together under the action of the flocculating agent and are separated from the solvent water to form a solid-liquid mixed phase; then, the separated mud in the mud storage barrel 10 is pumped to a squeezer 11 through devices such as a mud pump and the like for squeezing treatment to form a mud cake 3 and purified water, the purified water can be recycled on site, for example, used for sand washing of a sand washer 5, the water content of the mud cake 3 after squeezing treatment is about 20%, the grains of the mud cake are fine, the mud cake can be directly transported to a processing plant by a special vehicle and pressed into environment-friendly bricks and the like, and harmless recycling of the waste mud is completely realized.
In squeezing the process for solving the separation material that the particle diameter is greater than or equal to 4mm, can damage the problem of squeezer 11's filter cloth, the utility model discloses further set up as follows.
The washing and filtering system also comprises a cyclone 9 arranged on a connecting pipeline of the slurry tank 8 and the slurry storage barrel 10, and the slurry is separated into separated materials with the particle size larger than or equal to 4mm through the cyclone 9 before being sent to the slurry storage barrel 10, and the separated materials are conveyed back to the sand washer 5.
Before being pumped into a slurry storage barrel 10, slurry in the slurry box 8 is firstly separated by a cyclone 9, the cyclone 9 screens a separation material with the particle size larger than or equal to 4mm in slurry mixed liquid by utilizing a centrifugal sedimentation principle, the separation material is prevented from damaging filter cloth of a presser 11 in the subsequent squeezing process operation, and the screened separation material enters a sand washer 5 again to be cleaned and sand is discharged.
Further, the dewatering screen 6 comprises a screen box, a vibration exciter, a supporting system and a motor, a base bottom groove 601 is formed in the bottom of the screen box, and the base bottom groove 601 is connected with the rotary screen 4 through a pipeline.
Dewatering screen 6 will take water net sand shock separation to form water and net sand 2, rivers advance in frame kerve 601 and net sand 2 is carried to the sand piling yard by the drive belt, and the water in frame kerve 601 can pass through the pipeline and carry to drum sieve 4 in, handles the water resource after the dehydration on the one hand, and on the other hand handles the granule that still exists in the aquatic.
The drum screen 4 comprises a screen drum and a feeding hopper, and the screen drum and the feeding hopper are both obliquely arranged; the sieve cylinder and the feeding hopper are obliquely arranged to facilitate blanking.
In order to solve the problem that some foundation pit soil 1 is already agglomerated into a large block before entering the drum screen 4 and is inconvenient to be put into the drum screen 4, the utility model discloses further set up as follows.
The feeding hopper is provided with at least two high-pressure water guns with outward pipe orifices; spray devices are installed on two sides of the screen cylinder and spray water towards the inside of the screen cylinder. The high-pressure water gun is arranged at the feeding hopper, large massive foundation pit soil 1 can be preliminarily moistened and scattered, and the spraying devices on the two sides are used for moistening and scattering the large massive foundation pit soil 1 in the rotating process of the screen drum.
Further, two pulp storage barrels 10 are arranged, and the two pulp storage barrels 10 are communicated through a pipeline; the storage amount of the slurry is increased, thereby reducing the frequency of coagulation reaction by adding the flocculant, increasing the amount of slurry per treatment, and when the amount of slurry in one slurry tank 10 is excessive, the slurry can flow into another slurry tank 10.
Furthermore, the utility model discloses still provide a foundation ditch soil one-stop formula processing method, as shown in fig. 1 and fig. 2, including washing and straining the process and squeeze the process, correspond foretell washing and strain the system and squeeze the system.
The washing and filtering process comprises the following steps:
s11, conveying the foundation pit soil 1 to a drum screen 4 for primary screening, and screening to form coarse materials with the particle size larger than 10mm and fine materials with the particle size smaller than or equal to 10 mm;
s12, transporting the coarse materials to a designated place, transporting the fine materials to a sand washer 5 for washing and screening, and washing and screening the fine materials by the sand washer 5 to form water-bearing clean sand and slurry;
s13, vibrating and dehydrating the clean sand with water through a dehydration screen 6 to form clean sand 2, outputting the clean sand 2 to a sand piling field through a conveyor belt 7, and storing slurry formed after washing through a sand washer 5 in a slurry box 8.
The pressing process comprises the following steps:
s21, conveying the slurry in the slurry box 8 to a slurry storage barrel 10, adding a flocculating agent into the slurry storage barrel 10, and performing coagulation reaction on the flocculating agent and the slurry;
s22, conveying the slurry after coagulation reaction to a presser 11, and pressing to form purified water and a mud cake 3.
The sand washers 5 are bucket wheel type sand washers, and two sets of sand washers are provided, which are respectively a first sand washer and a second sand washer (which are sequentially arranged from left to right in fig. 1), in the step S12, the fine materials are firstly conveyed into the first sand washer to be washed and sieved, and then are washed and sieved by the second sand washer after the washing and sieving are finished.
In step S21, before the slurry in the slurry tank 8 is conveyed to the slurry storage barrel 10, the slurry is separated by the cyclone 9 for screening a separated material having a particle size of not less than 4mm in the slurry, the screened separated material is conveyed to the backwashing sand machine 5 again for cleaning, and the separated slurry is conveyed to the slurry storage barrel 10 through a pipeline.
In step S22, the slurry pumped into the press 11 under high pressure is filtered by 118 regularly arranged filter plates having a diameter of 1200mm and filter cloth sandwiched between the filter plates; meanwhile, when the filtration is started, the filtered slurry enters each filtration chamber for solid-liquid separation under the driving of the feeding pump by virtue of the pressure generated by the feeding pump, and the filtrate is continuously discharged from the liquid outlet valve through the drainage plate, is available clean water and is stored in the water storage tank for on-site recycling.
The press 11 mainly comprises a frame, a filtering device, a feeding device, a hydraulic device, a filter cloth and an operation control.
The frame includes pressure strip, thrust plate, hydro-cylinder seat, pressure filter girder, and filter equipment includes rectangle bag pressure formula filter plate, spring, sealed glue, water injection well choke, and hydraulic means includes hydraulic cylinder, hydraulic motor and manometer.
In the squeezing process, the slurry continuously penetrates through the filter cloth and falls into the drainage tank, then is discharged into the reservoir 12 through the drainage tank and the liquid outlet valve, the reservoir 12 is temporarily dug in a field, the shape and the size are determined according to the field condition, and the capacity is considered to be 1.5-2.0 times of the clean water produced on the construction field daily.
After having handled an amount of foundation ditch soil 1 with squeezer 11, the utility model discloses a single-stop processing method of foundation ditch soil still includes squeezer 11 and stops to squeeze and the filter cake unloads the process, and it specifically includes following step:
s31, stopping feeding when the pressure filter pump reaches 2 MPa;
s32, opening an emptying valve of the squeezer 11, pressing a button for releasing the filter plate after preventing and controlling fluid squeezing, pressing a stop button after the pressing plate retreats to a proper position, automatically retreating to a set travel switch, and automatically stopping the pressing plate;
s33, after the mud is squeezed and filtered, the drainage plate is rotated, and the filter plates are pulled away one by the pull plate trolley, so that the mud cake 3 is automatically unloaded.
While the preferred embodiments of the present invention have been described, the present invention is not limited to the embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention as defined by the appended claims.

Claims (5)

1. The one-stop foundation pit soil treatment system is characterized by comprising a washing and filtering system and a squeezing system, wherein the washing and filtering system is used for separating foundation pit soil (1) to form clean sand (2) and slurry, and the squeezing system is used for separating the slurry to form a mud cake (3) and clean water;
the washing and filtering system comprises a rotary screen (4), a plurality of groups of sand washing machines (5) for receiving fine materials screened by the rotary screen (4), a dewatering screen (6) for separating water-carrying clean sand, and a mud tank (8) for storing mud generated by the sand washing machines (5);
the squeezing system comprises a slurry storage barrel (10) which is connected with a slurry tank (8) through a pipeline and is used for separating slurry, and a squeezing machine (11) which is used for squeezing the slurry separated by the slurry storage barrel (10) to form a mud cake (3) and water.
2. The foundation pit soil one-stop treatment system according to claim 1, wherein the washing and filtering system further comprises a cyclone (9) arranged in a connecting pipeline of the slurry tank (8) and the slurry storage barrel (10), and the slurry is separated into separated materials with the particle size not less than 4mm through the cyclone (9) before being sent to the slurry storage barrel (10) and is conveyed back to the sand washer (5).
3. The foundation pit soil one-stop treatment system according to claim 1, wherein the dewatering screen (6) comprises a screen box, a vibration exciter, a support system and a motor, and the bottom of the screen box is provided with a base bottom groove (601), and the base bottom groove (601) is in pipeline connection with the rotary screen (4).
4. The foundation pit soil one-stop treatment system according to claim 1, wherein the drum screen (4) comprises a screen drum and an inlet hopper, and the screen drum and the inlet hopper are both obliquely arranged; the feeding hopper is provided with at least two high-pressure water guns with outward pipe orifices; spray sets are all installed to the both sides of a sieve section of thick bamboo, spray sets spray water towards a sieve section of thick bamboo is inside.
5. The foundation pit soil one-stop treatment system according to claim 1, wherein two slurry storage tanks (10) are provided, and the two slurry storage tanks (10) are communicated through a pipeline.
CN202020540609.9U 2020-04-13 2020-04-13 One-stop foundation pit soil treatment system Active CN212375056U (en)

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Application Number Priority Date Filing Date Title
CN202020540609.9U CN212375056U (en) 2020-04-13 2020-04-13 One-stop foundation pit soil treatment system

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113042193A (en) * 2021-03-10 2021-06-29 中铁十六局集团北京轨道交通工程建设有限公司 Sand-stone separation and cleaning equipment suitable for recycling of muck and construction method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113042193A (en) * 2021-03-10 2021-06-29 中铁十六局集团北京轨道交通工程建设有限公司 Sand-stone separation and cleaning equipment suitable for recycling of muck and construction method

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