CN112759208B - Layered dehydration and solidification treatment device for engineering waste slurry and use method - Google Patents
Layered dehydration and solidification treatment device for engineering waste slurry and use method Download PDFInfo
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- CN112759208B CN112759208B CN202011639503.5A CN202011639503A CN112759208B CN 112759208 B CN112759208 B CN 112759208B CN 202011639503 A CN202011639503 A CN 202011639503A CN 112759208 B CN112759208 B CN 112759208B
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/008—Sludge treatment by fixation or solidification
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
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Abstract
The invention relates to a layered dehydration and solidification treatment device for engineering waste slurry, which comprises a top vacuum drain pipe, a slurry inlet pipe, a layered slurry tank, a transverse drainage steel pipe, a vertical drainage steel pipe and a bottom vacuum drain pipe, wherein the top vacuum drain pipe is connected with the top vacuum drain pipe; flocculating agent injection holes are formed around the slurry inlet pipe; the layered mud box is divided into four layers, and the same side of each layer is connected with two mud inlet pipes and two flocculating agent injection holes; the top plate and the bottom plate of each layer of the layered mud box are provided with drain pipe jacks. The invention has the beneficial effects that: the curing agent and the treated dehydrated slurry are ensured to be uniformly mixed; the vertical drainage steel pipe and the transverse drainage steel pipe in the layered slurry box can be used for pumping water in vacuum and can also be used for injecting a curing agent, so that the dehydration and curing functions are integrated, the treatment time is greatly shortened, and the backfill strength is improved; the vacuum pumps in different pumping directions are adopted for intermittent pumping, so that a compact earth pillar is prevented from being formed prematurely, high vacuum degrees of horizontal and vertical vacuum prepressing are ensured, and the water yield is increased.
Description
Technical Field
The invention belongs to the field of slurry dehydration and solidification, and particularly relates to a layered dehydration and solidification treatment device for engineering waste slurry and a use method.
Background
At present, a large amount of waste mud is often generated during construction of projects such as engineering site underground diaphragm walls, shield tunnels, cast-in-situ bored piles and the like, and the waste mud has the characteristics of high water content, strong dispersibility and difficulty in self-weight consolidation and the like, so the conventional treatment method comprises the steps of outward transportation treatment of the waste mud, site drying treatment and vacuum preloading in a traditional mode, the outward transportation cost of the mud is high, and the environment pollution caused by mud overflow and scattering is easy to occur. The field drying treatment usually needs to excavate a large mud pit near the engineering field, the treatment time is long, and the treatment effect cannot be guaranteed. The traditional vacuum preloading is improved on the basis of on-site drying treatment, so that the treatment efficiency of the waste slurry is improved, but the following three main problems exist in a large number of on-site applications:
1. the large-scale mud pond of job site's unable excavation carries out abandonment mud and handles, and vacuum presents the degressive problem from the top down in traditional vacuum preloading mud pond, leads to abandonment mud treatment effect often to appear degressive condition from last down, can't reach the landfill standard requirement after the processing of partial abandonment mud.
2. The field treatment of the slurry consumes a long time, and if the flocculation is carried out by adopting an external medicament, the flocculation stirring and vacuum dehydration of the waste slurry can not be seamlessly connected.
3. After traditional vacuum preloading is handled, if the treatment effect is relatively poor, still need add the curing agent and just can the landfill after stirring, waste time and energy, economic nature is relatively poor.
In conclusion, the problems to be solved urgently at present are that the vacuum degree is ensured, the treatment effect is improved, and the seamless connection between the flocculation stirring and solidification stirring and the vacuum preloading is realized.
Disclosure of Invention
The invention aims to overcome the defects and provide a device for layered dehydration and solidification of engineering waste slurry.
This kind of engineering waste mud layering dehydration and solidification processing apparatus includes: the device comprises a top vacuum drain pipe, a slurry inlet pipe, a layered slurry tank, a transverse drainage steel pipe, a vertical drainage steel pipe and a bottom vacuum drain pipe; flocculating agent injection holes are formed around the slurry inlet pipe; the layered mud box is divided into four layers, and the same side of each layer is connected with two mud inlet pipes and two flocculating agent injection holes; the top plate and the bottom plate of each layer of the layered mud box are provided with drain pipe jacks; the vertical drainage steel pipe is wrapped with a layer of filter cloth and then passes through the drainage pipe jack, and is connected with the top vacuum drainage pipe and the bottom vacuum drainage pipe through the drainage pipe joint, and the top vacuum drainage pipe and the bottom vacuum drainage pipe are respectively connected with a vacuum pump; after slurry feeding is finished, the transverse drainage steel pipe is wrapped with a layer of filter cloth and transversely inserted into the waste slurry from a flocculant injection hole, the transverse drainage steel pipe is connected with a vacuum drainage pipe through the transverse drainage steel pipe, and all the transverse drainage steel pipes are connected with a vacuum pump; and splicing the layered mud box and the dumping board.
Preferably, a steel bracket with rollers is arranged at the bottom of the layered mud tank, and a bottom vacuum drain pipe is arranged in the steel bracket.
Preferably, the layered slurry box and the dumping plate are spliced by adopting a mortise and tenon splicing process, sealing rubber strips are filled and pressed at the joints of the top and the bottom of the dumping plate and the layered slurry box, and the dumping plate and the layered slurry box are sealed by adopting polyurethane rubber.
Preferably, a ball check valve is installed on the slurry inlet pipe.
Preferably, the layered mud tank is welded from steel plates.
Preferably, vacuum drain holes are uniformly distributed on the pipe walls of the vertical drainage steel pipe and the transverse drainage steel pipe, and the diameter of the vacuum drain holes uniformly distributed on the pipe wall of the vertical drainage steel pipe is 1-3 mm; and curing agent injection pumps are externally connected to the vertical drainage steel pipes and the transverse drainage steel pipes, and matched SAC curing agents are sprayed into soil.
Preferably, the diameter of the flocculant injection hole is the same as that of the transverse drainage steel pipe, and the centers of the flocculant injection hole and the slurry inlet pipe are perpendicular to each other.
The construction and use method of the engineering waste slurry layered dehydration and solidification treatment device comprises the following steps:
11, removing the vacuum pump and all vacuum drain pipes connected with the vertical drainage steel pipe and the horizontal drainage steel pipe, and connecting the horizontal drainage steel pipe and the vertical drainage steel pipe with a curing agent injection pump;
step 13, after curing for a period of time, pulling out the horizontal drainage steel pipe and the vertical drainage steel pipe from the flocculant injection hole and the drainage jack respectively;
step 14, lifting the soil discharging plate from the upper part, discharging the pre-pressed solidified soil, and using the soil as a filler;
step 15, inserting the dumping plate into the bayonet from top to bottom, filling sealing rubber strips at the joints with the top and the bottom of the layered mud box, and sealing by adopting polyurethane glue;
and step 16, repeating the steps 1 to 15, and processing the waste slurry next time.
Preferably, in the step 9, the time period for starting the vacuum pump connected with the vertical drainage steel pipe to work is the first 12 hours, and the working time of the vacuum pump connected with the vertical drainage steel pipe is 2 hours; the working time of a vacuum pump connected with the transverse drainage steel pipe is 2 hours; in the step 10, the specific time period for the vacuum pumps connected with the vertical drainage steel pipes and the horizontal drainage steel pipes to work simultaneously is from 12h to 24 h; the time period for curing in step 13 was 6 hours.
Preferably, the set values of the water output of the two vacuum pumps in the step 10 are both 100ml per hour.
The beneficial effects of the invention are:
1. the slurry tanks are layered to carry out slurry treatment, and when the flocculating agent is mixed, the flocculating agent and the waste slurry in each layer of the slurry tank are fully stirred and mixed in a mode that the central connecting line of the slurry inlet pipe and the flocculating agent injection hole is vertically distributed, so that the flocculation quality is improved. Secondly, water is pumped in a layered mode through the vertical drainage steel pipes and the transverse drainage steel pipes, and the uniformity of the vacuum degree in each layer of the mud box is guaranteed. And finally, the curing agent is injected into the vertical drainage steel pipe and the horizontal drainage steel pipe layer by layer, so that the curing agent and the treated dehydrated slurry are uniformly mixed.
2. The vertical drainage steel pipe and the horizontal drainage steel pipe in the layered slurry box can be used for pumping water in vacuum and can also be used for injecting a curing agent, so that the dehydration and curing functions are integrated, the treatment time is greatly shortened, and the backfill strength is improved.
3. The vacuum pumps in different pumping directions are adopted for intermittent pumping, so that a compact earth pillar is prevented from being formed prematurely, high vacuum degrees of horizontal and vertical vacuum prepressing are ensured, and the water yield is increased.
4. The dumping plates are spliced by adopting a mortise and tenon splicing process, sealing rubber strips are filled and pressed at the joints of the top and the bottom of the layered slurry box, and the layered slurry box is sealed by adopting polyurethane glue.
Drawings
FIG. 1 is a cross-sectional view of a layered mud tank;
FIG. 2 is a left side view of the single layer mud tank;
FIG. 3 is a top view of the layered mud tank;
FIG. 4 is a schematic view of a vertical steel drainage pipe joint;
FIG. 5 is a top view of a rejector plate interface.
Description of reference numerals: the device comprises a top vacuum drain pipe 1, a transverse drain steel pipe 2, a vertical drain steel pipe 3, waste slurry 4, a slurry inlet pipe 5, a flocculant injection hole 6, a drain pipe joint 7, a layered slurry box 8, a bottom vacuum drain pipe 9, a vacuum drain hole 10, filter cloth 11 and a soil discharging plate 12.
Detailed Description
The present invention will be further described with reference to the following examples. The following examples are set forth merely to aid in the understanding of the invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Example 1:
a device for layered dewatering and solidifying engineering waste mud, as shown in fig. 1 to 5, comprising: the device comprises a top vacuum drain pipe 1, a slurry inlet pipe 5, a layered slurry tank 8, a transverse drain steel pipe 2, a vertical drain steel pipe 3 and a bottom vacuum drain pipe 9; flocculating agent injection holes 6 are arranged around the slurry inlet pipe 5; the layered slurry box 8 is divided into four layers (the size of the box body is 4m x 4m, the height of each layer is 1m), and two slurry inlet pipes 5 with the diameter of 15cm and two flocculating agent injection holes 6 with the diameter of 5cm are connected to the same side of each layer; the top plate and the bottom plate of each layer of the layered slurry box 8 are provided with drain pipe jacks, the vertical drain steel pipe 3 is wrapped with a layer of filter cloth 11 and then passes through the drain pipe jacks to be connected with the top vacuum drain pipe 1 and the bottom vacuum drain pipe 9, and the top vacuum drain pipe 1 and the bottom vacuum drain pipe 9 are respectively connected with a vacuum pump; after the slurry feeding is finished, the transverse drainage steel pipes 2 are wrapped with a layer of filter cloth 11, waste slurry 4 is transversely inserted from the flocculant injection hole 6, and all the transverse drainage steel pipes 2 are connected with a vacuum pump; the layered mud box 8 is spliced with the dumping plate 12 on the right side of the layered mud box 8.
The bottom of the layered mud box 8 is provided with a steel bracket with rollers, and a bottom vacuum drain pipe 9 is arranged in the steel bracket. The layered mud box 8 and the dumping plate 12 are spliced by adopting a mortise and tenon splicing process, and the joint parts of the dumping plate 12 and the top and the bottom of the layered mud box 8 are filled with sealing rubber strips and sealed by adopting polyurethane rubber. The slurry inlet pipe 5 is provided with a ball check valve. The layered mud tank 8 is formed by welding 10mm steel plates. Vacuum drain holes 10 are uniformly distributed on the pipe walls of the vertical drainage steel pipe 3 and the transverse drainage steel pipe 2, and the diameter of the vacuum drain holes 10 uniformly distributed on the wall of the vertical drainage steel pipe 3 is 1-3 mm; and a curing agent injection pump is externally connected to the vertical drainage steel pipe 3 and the transverse drainage steel pipe 2, and the matched SAC curing agent is sprayed into soil. The diameter of the flocculant injection hole 6 is the same as that of the transverse drainage steel pipe 2, and the centers of the flocculant injection hole 6 and the slurry inlet pipe 5 are mutually vertical.
Example 2:
a construction and use method of a device for layered dehydration and solidification treatment of engineering waste slurry comprises the following steps:
11, removing the vacuum pump and all vacuum drain pipes connected with the vertical drainage steel pipe 3 and the horizontal drainage steel pipe 2, and connecting the horizontal drainage steel pipe 2 and the vertical drainage steel pipe 3 with a curing agent injection pump;
step 13, after solidification is carried out for 6 hours, the transverse drainage steel pipe 2 and the vertical drainage steel pipe 3 are respectively pulled out from the flocculating agent injection hole 6 and the drainage jack;
step 14, lifting the soil discharging plate 12 from the upper part, discharging the pre-pressed solidified soil, and using the soil as a filler;
step 15, inserting the soil discharging plate 12 into the bayonet from top to bottom, filling sealing rubber strips at the joints with the top and the bottom of the layered mud box 8, and sealing by adopting polyurethane glue;
and step 16, repeating the steps 1 to 15, and processing the waste slurry 4 for the next time.
The invention adopts the engineering waste slurry layered dehydration and solidification treatment device and the use method to carry out the dehydration treatment of the waste slurry, which can greatly shorten the vacuum preloading time, improve the vacuum preloading water yield, enhance the strength of the vacuum preloading solidified soil, meanwhile, the engineering waste slurry layered dehydration and solidification treatment device can be recycled, and improve the treatment efficiency of the waste slurry.
Claims (3)
1. The use method of the device for the layered dehydration and solidification treatment of the engineering waste slurry is characterized by comprising the following steps:
step 1, welding a layered slurry box (8) by adopting a steel plate on an engineering site, wherein the layered slurry box (8) is divided into four layers, and two slurry inlet pipes (5) and two flocculant injection holes (6) are reserved on the same side of each layer of the layered slurry box (8) by the steel plate; pre-casting a mortise and tenon bayonet when the steel plate at the other side of the layered slurry box (8) is cast, and inserting the soil discharging plate (12) into the bayonet from bottom to top after the rest part of the frame is welded; sealing rubber strips are filled and pressed at the joints of the top and the bottom of the layered mud box (8) and are sealed by polyurethane rubber;
step 2, opening a check valve on the slurry inlet pipe (5), inserting a flocculating agent injection pipe into the flocculating agent injection hole (6), and sealing the flocculating agent injection hole (6);
step 3, uniformly fully punching vacuum drain holes (10) on the pipe walls of the vertical drainage steel pipe (3) and the transverse drainage steel pipe (2);
step 4, wrapping a layer of filter cloth (11) outside the vertical drainage steel pipe (3), and inserting the filter cloth from the top drainage pipe jack until the filter cloth penetrates out of the bottom drainage pipe jack;
step 5, connecting two ends of the vertical drainage steel pipe (3) with the top vacuum drainage pipe (1) and the bottom vacuum drainage pipe (9) by using a drainage pipe joint (7), and sealing the joint;
step 6, pumping the on-site waste slurry into a layered slurry box (8) through a slurry inlet pipe (5), injecting a prepared flocculating agent into the layered slurry box (8) from a flocculating agent injection hole (6) through a flocculating agent injection pipe, and stopping after the layered slurry box (8) is filled;
step 7, closing a check valve on the slurry inlet pipe (5), inserting the transverse drainage steel pipe (2) into the layered slurry box (8) from each layer of flocculant injection hole (6), and connecting the transverse drainage steel pipe (2) with a vacuum drainage pipe by using a drainage pipe joint (7);
step 8, connecting a top vacuum drain pipe (1) and a bottom vacuum drain pipe (9) connected with the vertical drainage steel pipe (3) with a vacuum pump respectively, and connecting the top vacuum drain pipe (1) and the bottom vacuum drain pipe (9) connected with the transverse drainage steel pipe (2) with another vacuum pump;
step 9, starting a vacuum pump connected with the vertical drainage steel pipe (3) to work for a period of time and then stopping the pump by adopting an intermittent air pumping mode, starting a vacuum pump connected with the transverse drainage steel pipe (2) to work for a period of time and then stopping the pump, and sequentially and intermittently working;
step 10, simultaneously operating vacuum pumps connected with the vertical drainage steel pipes (3) and the transverse drainage steel pipes (2) within a specific time period, and stopping the pumps until the water yields of the two vacuum pumps are less than a set value;
11, removing the vacuum pump and all vacuum drain pipes connected with the vertical drainage steel pipe (3) and the horizontal drainage steel pipe (2), and connecting the horizontal drainage steel pipe (2) and the vertical drainage steel pipe (3) with a curing agent injection pump;
step 12, starting a curing agent injection pump, spraying the prepared curing agent into soil, and closing the curing agent injection pump after all the curing agent is injected;
step 13, after curing for a period of time, pulling out the transverse drainage steel pipe (2) and the vertical drainage steel pipe (3) from the flocculant injection hole (6) and the drainage jack respectively;
step 14, lifting the soil discharging plate (12) from the upper part, and discharging the pre-pressed solidified soil;
step 15, inserting the soil discharging plate (12) into the bayonet from top to bottom, filling sealing rubber strips at the interface parts of the top and the bottom of the layered mud box (8), and sealing by adopting polyurethane rubber;
and step 16, repeating the steps 1 to 15, and processing the waste slurry (4) next time.
2. The use method of the device for layered dehydration and solidification treatment of engineering waste mud according to claim 1, is characterized in that: in the step 9, the working time period of starting the vacuum pump connected with the vertical drainage steel pipe (3) is 12 hours in the front, and the working time of the vacuum pump connected with the vertical drainage steel pipe (3) is 2 hours; the working time of a vacuum pump connected with the transverse drainage steel pipe (2) is 2 hours; in the step 10, the vacuum pumps connected with the vertical drainage steel pipes (3) and the transverse drainage steel pipes (2) work simultaneously within a specific time period from 12h to 24 h; the time period for curing in step 13 was 6 hours.
3. The use method of the device for layered dehydration and solidification treatment of engineering waste mud according to claim 1, is characterized in that: the set values of the water output of the two vacuum pumps in the step 10 are both 100ml per hour.
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| CN202011639503.5A CN112759208B (en) | 2020-12-31 | 2020-12-31 | Layered dehydration and solidification treatment device for engineering waste slurry and use method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030015095A (en) * | 2001-08-14 | 2003-02-20 | 이정언 | Electro-dewatering system of filter press |
| CN101357817A (en) * | 2008-09-11 | 2009-02-04 | 中国科学院武汉岩土力学研究所 | Stereoscopic network drainage for accelerating water drainage consolidation velocity of hydraulic mud fill sludge |
| CN104961270A (en) * | 2015-06-13 | 2015-10-07 | 武亚军 | Agent vacuum pre-compression method for treating engineering waste slurry |
| CN105645709A (en) * | 2016-03-12 | 2016-06-08 | 上海大学 | Dissolved gas and reagent integrated vacuum preloading method |
| CN110424369A (en) * | 2019-06-25 | 2019-11-08 | 温州大学 | A kind of level-vertical drainage plate-flocculation vacuum preloading process for treating sludge |
-
2020
- 2020-12-31 CN CN202011639503.5A patent/CN112759208B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030015095A (en) * | 2001-08-14 | 2003-02-20 | 이정언 | Electro-dewatering system of filter press |
| CN101357817A (en) * | 2008-09-11 | 2009-02-04 | 中国科学院武汉岩土力学研究所 | Stereoscopic network drainage for accelerating water drainage consolidation velocity of hydraulic mud fill sludge |
| CN104961270A (en) * | 2015-06-13 | 2015-10-07 | 武亚军 | Agent vacuum pre-compression method for treating engineering waste slurry |
| CN105645709A (en) * | 2016-03-12 | 2016-06-08 | 上海大学 | Dissolved gas and reagent integrated vacuum preloading method |
| CN110424369A (en) * | 2019-06-25 | 2019-11-08 | 温州大学 | A kind of level-vertical drainage plate-flocculation vacuum preloading process for treating sludge |
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