CN111410337A - One-stop treatment system and method for foundation pit soil - Google Patents
One-stop treatment system and method for foundation pit soil Download PDFInfo
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- CN111410337A CN111410337A CN202010286734.6A CN202010286734A CN111410337A CN 111410337 A CN111410337 A CN 111410337A CN 202010286734 A CN202010286734 A CN 202010286734A CN 111410337 A CN111410337 A CN 111410337A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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Abstract
The invention discloses a one-stop treatment system and a one-stop treatment method for foundation pit soil, which belong to the field of treatment of waste residue soil in foundation pit earthwork excavation and comprise a washing and filtering system and a squeezing system, wherein the washing and filtering system is used for separating the foundation pit soil to form clean sand and slurry, and the squeezing system is used for separating the 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
Technical Field
The invention relates to the field of treatment of waste residue soil in foundation pit earthwork excavation, in particular to a one-stop treatment system and a one-stop treatment method for foundation pit soil.
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 the defects of the prior art, the invention provides a one-stop foundation pit soil treatment system and a treatment method, and aims to solve the problems of waste of soil resources, limited occupied area, poor economy, environmental pollution and the like in the conventional foundation pit earthwork treatment mode.
The technical scheme adopted by the invention for solving the technical problems is as follows:
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.
A one-stop foundation pit soil treatment method comprises a washing and filtering process and a squeezing process, wherein the washing and filtering process comprises the following steps:
s11, conveying the foundation pit soil to a drum screen for primary screening, and screening to form coarse materials and fine materials;
s12, transporting the coarse material to a designated place, transporting the fine material to a sand washer for washing and screening, and washing and screening the fine material by the sand washer to form clean sand and slurry with water;
s13, vibrating and dewatering the clean sand with water through a dewatering screen to form clean sand, outputting the clean sand to a sand piling field through a conveyor belt, and storing slurry formed after washing and screening through a sand washer in a slurry tank;
the pressing process comprises the following steps:
s21, conveying the slurry in the slurry box to a slurry storage barrel, adding a flocculating agent into the slurry storage barrel, and performing coagulation reaction on the flocculating agent and the slurry;
and S22, conveying the slurry after coagulation reaction to a presser, and pressing to form clear water and a mud cake.
Preferably, in step S21, before the slurry in the slurry tank is conveyed to the slurry storage barrel, the slurry is separated by a cyclone for screening a separated material with a particle size of not less than 4mm in the slurry, the screened separated material is conveyed back to the sand washing machine again for cleaning, and the separated slurry is conveyed to the slurry storage barrel through a pipeline.
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.
Preferably, the sand washers are bucket wheel type sand washers, two sets of the sand washers are provided, the two sets of the sand washers are respectively a first sand washer and a second sand washer, in the step S12, the fine materials are firstly conveyed into the first sand washer to be washed and sieved, and then the fine materials are washed and sieved by the second sand washer after the fine materials are washed and sieved.
Preferably, in step S11, the coarse material has a particle size of greater than 10mm, and the fine material has a particle size of less than or equal to 10 mm.
The invention has the beneficial effects that:
1. one-stop treatment of washing, filtering and squeezing
The invention adopts two sets of treatment systems of washing and filtering and squeezing, the washing and filtering system washes and filters foundation pit soil to generate clean sand and slurry, and then adopts the squeezing system to convert the slurry into clean water and mud cakes, and the one-stop treatment technology has the advantages of thorough integral treatment process, high harmless degree and good effect;
2. high processing capacity
The washing and filtering system and the squeezing system can set corresponding matching quantity according to factors such as the area size of a field, the excavation capacity, the construction period requirement and the like, and can set a plurality of treatment production lines simultaneously; the system can continuously work after being started and has strong processing capacity.
3. Simple processing operation
The processing equipment utilized by the invention adopts streamlined operation, the mechanical automation degree is high, the operation is simple and convenient, the circulating processing time is short, and the requirement can be met by 2-3 field operators;
4. the economic benefit is remarkable
The foundation pit soil is subjected to washing, filtering and squeezing treatment and then is converted into clean sand, mud cakes and purified water, the clean sand and the purified water can be fully reused, and the renewable resources create remarkable economic benefits;
5. significant resource saving effect
The method treats the foundation pit soil on site, avoids occupying a large area of foundation pit soil yard, and saves a large amount of planning land for the 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 treatment technology disclosed by the invention has the advantages that the foundation pit soil is treated into the sand, mud cakes and water which can be recycled on site in a construction site, the whole process is one-stop harmless treatment, the amount of outward transported waste is greatly reduced, the transportation amount of a mud head vehicle is reduced, the environment pollution and the occupation of municipal roads caused by vehicles are avoided, and the treatment technology is green, environment-friendly and pollution-free.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic structural view of a one-stop foundation pit soil treatment system according to the present invention;
fig. 2 is a flow chart of the foundation pit soil one-stop treatment method in the 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. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within 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. All technical characteristics in the invention can be interactively combined on the premise of not conflicting with 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 invention provides a treatment system and a treatment method for treating foundation pit soil through washing, filtering and squeezing, wherein the foundation pit excavated earthwork is subjected to washing, filtering and squeezing, solid-liquid separation and harmless treatment are realized, and waste residue soil is converted into clean sand, colorless water and plastic mud cakes, so that the treatment system and the treatment method are green and environment-friendly.
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 order to solve the problem that the separated material with the grain size of 4mm or more damages the filter cloth of the presser 11 in the pressing process, the invention is further configured 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.
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 the foundation pit soil 1 is not convenient to be placed into the drum screen 4 because the foundation pit soil is already formed into large blocks before entering the drum screen 4, the invention is further arranged 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.
In addition, the invention also provides a one-stop foundation pit soil treatment method, which comprises a washing and filtering process and a squeezing process corresponding to the washing and filtering system and the squeezing system as shown in fig. 1 and fig. 2.
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 a certain amount of foundation pit soil 1 is treated by the squeezer 11, the one-stop foundation pit soil treatment method further comprises the squeezing process and the filter cake unloading process of the squeezer 11, and the method specifically comprises the following steps:
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 illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
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.
6. The one-stop foundation pit soil treatment method is characterized by comprising a washing and filtering process and a squeezing process, wherein 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 and fine materials;
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 dehydrating 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 and screening through a sand washing machine (5) into 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 clear water and a mud cake (3).
7. The foundation pit soil one-stop processing method according to claim 6, wherein in the step S21, the slurry in the slurry box (8) is separated by the cyclone (9) before being conveyed to the slurry storage barrel (10) for screening the separated material with the particle size not less than 4mm in the slurry, the screened separated material is conveyed back to the sand washing machine (5) for washing again, and the separated slurry is conveyed to the slurry storage barrel (10) through a pipeline.
8. The foundation pit soil one-stop treatment method according to claim 6, 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.
9. The foundation pit soil one-stop treatment method according to claim 6, wherein the sand washers (5) are bucket wheel type sand washers, and two sets of the sand washers are provided, namely a first sand washer and a second sand washer, in the step S12, the fine materials are 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.
10. The foundation pit soil one-stop processing method according to claim 6, wherein in the step S11, the particle size of the coarse material is larger than 10mm, and the particle size of the fine material is smaller than or equal to 10 mm.
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| CN202010286734.6A CN111410337A (en) | 2020-04-13 | 2020-04-13 | One-stop treatment system and method for foundation pit soil |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112844809A (en) * | 2020-12-31 | 2021-05-28 | 中铁工程服务有限公司 | Integrated shield muck environment-friendly treatment system |
| CN113427620A (en) * | 2021-06-04 | 2021-09-24 | 深圳市工勘岩土集团有限公司 | Automatic curing brick-making production line equipment based on foundation pit soil washing, filtering and squeezing residual sludge |
| CN114797240A (en) * | 2022-04-13 | 2022-07-29 | 湖南绿川环保科技有限公司 | Reduction, harmless and recycling treatment process for shield slag and mud |
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2020
- 2020-04-13 CN CN202010286734.6A patent/CN111410337A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112844809A (en) * | 2020-12-31 | 2021-05-28 | 中铁工程服务有限公司 | Integrated shield muck environment-friendly treatment system |
| CN112844809B (en) * | 2020-12-31 | 2022-07-29 | 中铁工程服务有限公司 | Integrated shield muck environment-friendly treatment system |
| CN113427620A (en) * | 2021-06-04 | 2021-09-24 | 深圳市工勘岩土集团有限公司 | Automatic curing brick-making production line equipment based on foundation pit soil washing, filtering and squeezing residual sludge |
| CN114797240A (en) * | 2022-04-13 | 2022-07-29 | 湖南绿川环保科技有限公司 | Reduction, harmless and recycling treatment process for shield slag and mud |
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