CN112452048A - Multistage edulcoration of engineering mud and resourceful system - Google Patents
Multistage edulcoration of engineering mud and resourceful system Download PDFInfo
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- CN112452048A CN112452048A CN202011067335.7A CN202011067335A CN112452048A CN 112452048 A CN112452048 A CN 112452048A CN 202011067335 A CN202011067335 A CN 202011067335A CN 112452048 A CN112452048 A CN 112452048A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
- B01D36/04—Combinations of filters with settling tanks
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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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- 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
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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
- C02F2001/007—Processes including a sedimentation step
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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Abstract
The invention relates to a multistage impurity removal and recycling system for engineering slurry, which comprises an impurity removal tank, a coarse grid, a grit chamber and a fine grid, wherein a water outlet of the impurity removal tank is communicated with a water inlet of the grit chamber through a grid channel; the impurity removal pool comprises a slope-shaped water distribution area at a water inlet and a settling area behind the water distribution area, the flow rate of the settling area is controlled to be 1-1.5 m/s, and the retention time of slurry is controlled to be 10-20 s; the distance between the grid strips of the coarse grid is 15-30 mm, and the distance between the grid strips of the fine grid is 5-10 mm. The mud-water separation can be efficiently carried out on the slurry by the inventor, sand, stone, garbage and mud are separated out through the four-stage impurity removal system, the recycling is convenient to be respectively carried out, and the extremely high economic benefit is achieved.
Description
Technical Field
The invention relates to the technical field of environmental protection engineering, in particular to a multistage impurity removal and recycling system for engineering slurry.
Background
The engineering slurry refers to various high-water-content solid wastes generated in the process of building urban infrastructure, including foundation pile construction slurry, rail traffic slurry, shield slurry, underground wall construction slurry and the like, and has the characteristics of large quantity, high water content, low organic matter content, complex and variable components and the like, and if the engineering slurry is not properly treated, serious consequences such as pipe network blockage, river channel siltation, water pollution and the like can be caused.
At present, the engineering mud treatment industry is still in a new stage, the technical maturity is not high, the pretreatment of the engineering mud is not taken into consideration, and the following modes are generally adopted: (1) no treatment is carried out; (2) fishing out visible garbage with larger size by manual work; (3) arranging a simple steel bar grid mesh, and filtering larger garbage in the simple steel bar grid mesh; (4) and arranging a front-end pre-settling tank to perform standing and settling treatment on the engineering slurry.
The existing treatment method has the following defects: (1) generally, only large-sized impurities in the waste water can be removed; (2) the efficiency of removing the sundries is low, particularly the manual cleaning and fishing mode; (3) the impurities such as small gravel, broken stone and the like are not removed basically; (4) the dependence on manpower is high, the working strength is very high, and the field environment is poor.
Due to the defects, the operation failure rate of the engineering slurry treatment plant in the existing pretreatment mode is high, the shutdown phenomenon frequently occurs, and the following main characteristics are achieved: (1) the sundries cause frequent blockage of the machine and the pump; (2) the sand content is high, the pipeline system is seriously abraded, and the service life is short; (3) the sedimentation of sand and stone causes serious silting of each treated structure and equipment, the available volume is quickly attenuated, the cleaning is frequent, the cleaning difficulty is very high, and the cleaning time is long; (4) the sand resource contained in the engineering slurry is not recycled, so that the resource waste is caused.
Summary of the invention
The invention provides a multistage edulcoration of engineering mud and resource system to at least a technical problem that exists among the prior art, can carry out mud-water separation to mud by the high efficiency, separates out sand, stone, rubbish and mud through level four edulcoration system, is convenient for carry out the resource respectively and recycles, has high economic benefits.
The technical scheme of the inventor for solving the technical problems is as follows: a multi-stage impurity removal and recycling system for engineering slurry comprises an impurity removal tank, a coarse grid, a grit chamber and a fine grid, wherein a water outlet of the impurity removal tank is communicated with a water inlet of the grit chamber through a grid channel, the coarse grid is arranged on the grid channel, and the fine grid is arranged at a water outlet of the grit chamber; the impurity removal pool comprises a slope-shaped water distribution area at a water inlet and a settling area behind the water distribution area, the flow rate of the settling area is controlled to be 1-1.5 m/s, and the retention time of slurry is controlled to be 10-20 s; the distance between the grid strips of the coarse grid is 15-30 mm, and the distance between the grid strips of the fine grid is 5-10 mm.
On the basis of the technical scheme, the inventor can also make the following improvement.
Further, the slope in cloth water district is 10 ~ 20.
Preferably, the impurity removing pool further comprises a sundries treatment mechanism, and the sundries treatment mechanism comprises a track arranged above the impurity removing pool, a movable grab bucket running on the track and a sundries receiving pool.
Preferably, the debris pond is the waterlogging caused by excessive rainfall pond, the debris pond still is provided with the return water pipe, return water pipe one end intercommunication debris pond's outlet, the other end sets up in the cloth water district.
Furthermore, a rotary mechanical coarse grid dirt remover is arranged on the water channel for mounting the coarse grid; and a conveying assembly for conveying the garbage is further arranged on the side edge of the water channel, one end of the conveying assembly is positioned at a feed opening of the rotary mechanical coarse grid dirt separator, and the other end of the conveying assembly is positioned at a garbage storage yard.
Furthermore, the grit chamber comprises a grit chamber water distribution area arranged at the water inlet and a plurality of grit areas positioned behind the grit chamber water distribution area, the horizontal flow rate of the grit areas is controlled to be 0.1-0.3 m/s, and the slurry residence time is controlled to be 30-60 s.
Preferably, a sand washing device is further arranged beside the grit chamber, the grit chamber further comprises a sand conveying mechanism for conveying settled sand to the sand washing device, and the sand conveying mechanism comprises a sand suction pump which reciprocates longitudinally along a grit zone and a soft pipeline for communicating the sand suction pump with the sand washing device.
Preferably, the bottom of each sand settling zone is provided with symmetrically arranged V-shaped grooves, and the included angle between the wall of the V-shaped groove and the horizontal plane is set to be 50-60 degrees; the sand setting area is also provided with a linear driving mechanism for driving the sand suction pump to reciprocate longitudinally along the sand setting area.
Further, a grid channel is arranged at a water outlet of the grit chamber, and the fine grid is arranged on the grid channel.
Preferably, a rotary mechanical fine grid dirt separator is installed in the grid channel, and a screw press conveyor is installed at a feed opening of the rotary mechanical fine grid dirt separator.
The beneficial effects of the inventor are as follows: the invention adopts a four-stage impurity removal system, which can ensure that various types and sizes of impurities in the engineering slurry are removed in a classified manner, realize classified disposal and greatly improve the resource utilization rate; the grading impurity removal system can obviously improve the removal efficiency of various impurities; the invention is provided with a separate sand removing and recycling device, realizes the recycling of resources from the engineering slurry, changes waste into valuable, is also provided with a garbage removing and recycling device, separates garbage for subsequent resource utilization, can dehydrate the residual slurry, can backfill and process the residual slurry into building materials, and has considerable economic benefit through classification disposal; the system of the invention can realize automatic operation and has less labor.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of the structure of the trash removal tank of the present invention;
FIG. 3 is a schematic diagram of the structure of the coarse grid of the present invention;
FIG. 4 is a schematic structural view of a desanding pool according to the invention;
FIG. 5 is a schematic view of the construction of the fine grid of the present invention;
in the drawings, the components represented by the respective reference numerals are listed below:
1. an impurity removal tank; 101 a water distribution area; 102. a settling zone; 103. a water outlet area; 104. a track; 105. a grab bucket; 106. a sundry pool; 107. draining pump; 108. a water return pipe; 2. coarse grating; 201. a grid channel; 202. a coarse grating machine; 203. a belt conveyor; 204. a refuse dump; 3. a sand removal tank; 301. a water distribution area; 302. a sand setting zone; 303. a sand suction pump; 304. a water outlet area; 305. a flexible pipeline; 4. a sand washing device; 5. fine grids; 501. a grid channel; 502. a fine grid machine; 503. a bolt conveyor; 504. a garbage trolley is provided.
Detailed Description
The principles and features of the present inventors are described below in conjunction with the following drawings, which are set forth by way of illustration only and not by way of limitation.
As shown in fig. 1, the present invention provides a multistage impurity removal and resource utilization system for engineering sludge, which is characterized in that: the impurity removal and resource utilization system comprises an impurity removal tank 1, a coarse grid 2, a grit chamber 3 and a fine grid 5, wherein a water outlet 103 of the impurity removal tank 1 is communicated with a water inlet of the grit chamber 3 through a grid channel, the coarse grid 2 is arranged on the grid channel, and the fine grid is arranged at a water outlet of the grit chamber 3.
The impurity removal pond 1 comprises a slope-shaped water distribution area 101 at a water inlet and a settling area 102 behind the water distribution area 101, the flow rate of the settling area 102 is controlled to be 1-1.5 m/s, and the retention time of slurry is controlled to be 10-20 s.
The distance between the grid strips of the coarse grid 2 is 15-30 mm, and the distance between the grid strips of the fine grid 5 is 5-10 mm.
The inventor designs a four-stage impurity removal system, wherein a heavy large impurity is removed by a settling tank 1, a large floating garbage is removed by a coarse grating 2 by intercepting, sand is removed by a grit chamber 3 by settling, and a fine floating garbage is removed by a fine grating 5 by intercepting. The obtained pure slurry can be subjected to subsequent dehydration treatment and then recycled, such as being used as backfill or building materials.
The impurity removal core of the inventor lies in two-stage sedimentation impurity removal, wherein the first-stage sedimentation is particularly critical, and in order to ensure the recovery utilization rate of sand, large heavy impurities such as stones, bricks, concrete blocks, mud blocks, broken stones and gravel need to be removed when the first-stage sedimentation impurity removal is carried out, so that only mud and sand remain in the heavy impurities in the slurry. The inventor finally designs the separation of large heavy impurities such as stones, bricks, concrete blocks, mud blocks, broken stones, gravel and the like and sand through the control of flow speed and residence time through long-time experimental research for achieving the purpose. In the impurity removal pool 1, the flow velocity of the settling zone 102 is controlled to be 1-1.5 m/s, the slurry residence time is controlled to be 10-20 s, the settling of large heavy impurities such as stones, bricks, concrete blocks, mud blocks, broken stones and gravel can be realized, and fine impurities such as sand and mud are driven by the rapidly flowing slurry to be suspended in the slurry due to the high flow velocity and are carried to subsequent treatment.
The impurity removal pool 1 can adopt the following specific structure to realize the collection of large heavy impurities such as stones, bricks, concrete blocks, mud blocks, broken stones, gravels and the like, and facilitate subsequent resource utilization.
The front end of the impurity removal tank is provided with a uniform water distribution area 101 which is in a triangular expansion shape, so that slurry fluid is kept uniform on the whole sedimentation section as much as possible, the bottom of the water distribution area 101 is in a slope shape, the slope can be controlled to be 10-20 degrees, and the slope is towards the sedimentation area 102, so that sundries are prevented from being accumulated. The control of the flow velocity of the settling zone 102 is realized through the reasonable setting of the flow and the water cross section, and the length of the settling zone 102 can be determined according to the retention time. In the settling zone 102, large-size and heavy impurities which are easy to settle, such as stones, bricks, concrete blocks, mud blocks, broken stones, gravel and the like, are settled and separated under the action of gravity, and enter a mud storage zone at the lower part, the horizontal flow rate of mud in the settling zone 102 is controlled within the range of 1-1.5 m/s, the retention time is controlled within the range of 10 s-20 s, so that the impurities with the particle size of more than 5mm are settled and removed in a pool, and the sand grains with the particle size of less than 5mm are prevented from being settled as little as possible. A track 104 can be arranged above the impurity removing pool 1 and penetrates from the settling area 102 to the outer side of the impurity pool 106, a movable grab bucket 105 is arranged on the track 104, the grab bucket 105 grabs out sediments from the bottom of the settling area 102 at a certain frequency and then moves into the impurity pool 106 through the track 104 to fall down, and the operating frequency of the grab bucket 105 can be adjusted on site at any time according to the actual amount of impurities. A plurality of sundries tanks 106 can be arranged, have a draining function and alternately operate, sundries from the grab bucket 105 are put into the sundries tanks for standing and draining treatment, and the bottom of the tank body is provided with a permeable layer and a ponding collecting and discharging device; the drainage pump 107 can be automatically started and stopped according to the water level of the accumulated water, and is conveyed back to the impurity removal tank 1 through the water return pipeline 108 for treatment. And large-size heavy easily-deposited sundries such as stones, bricks, concrete blocks, mud blocks, broken stones, gravels and the like can be transported outside to be used as backfill materials for various construction projects for recycling after the water content reaches the requirement.
After long-term summary research on slurry treatment, the inventor of the invention finds that impurities such as stones, bricks, concrete blocks, mud blocks, broken stones, gravels, sands and the like are main components in the engineering slurry, but impurities such as twigs, leaves, plastics, fabrics and the like are mixed in the process of transportation. The blockage of the current engineering slurry treatment system is mainly caused by the fact that designers do not consider the mixing of the impurities in the conveying process, so that the impurities are difficult to remove and mixed in the slurry, and the system blockage accident is caused.
The inventor designs a two-stage grating to realize the effective separation and removal of the mixed impurities.
In a more preferred embodiment of the present invention, a rotary mechanical coarse grid sewage disposal machine 202 is installed on the water channel on which the coarse grid 2 is installed; and a conveying assembly 203 for conveying the garbage is further arranged on the side edge of the water channel, one end of the conveying assembly 203 is positioned at a feed opening of the rotary mechanical coarse grid dirt separator 202, and the other end of the conveying assembly 203 is positioned at a garbage storage yard 204. The inventor's conveyor assembly 203 may be a belt conveyor.
The grid system with the structure can remove suspended or floating light impurities such as branches, leaves, plastics, fabrics and the like with larger sizes, send the light impurities to the garbage storage 204, and then send the light impurities to the urban domestic garbage treatment system for disposal at regular intervals.
In a preferred embodiment of the present invention, a grid channel 501 is arranged at the water outlet of the water outlet area 304 of the grit chamber 3, and the fine grid 5 is installed on the grid channel 501.
In a preferred embodiment of the present invention, a rotary mechanical fine grate cleaner 502 is installed in the grate channel 501, and a screw press conveyor 503 is installed at a discharge port of the rotary mechanical fine grate cleaner 502.
The grid system with the structure can remove suspended or floating light impurities such as small-sized branches, leaves, plastics, fabrics and the like. The waste cart 504 may be configured to periodically transport the debris to the municipal solid waste treatment system for disposal.
Another core point of the present inventors is the recycling of sand.
In a preferred embodiment of the present invention, the grit chamber 3 includes a grit chamber water distribution area 301 disposed at the water inlet and a plurality of grit zones 302 located behind the grit chamber water distribution area 301, the horizontal flow rate of the grit zones 302 is controlled to be 0.1-0.3 m/s, and the slurry residence time is controlled to be 30-60 s.
Through long-time experimental study, the horizontal flow rate of the sand setting area 302 is controlled to be 0.1-0.3 m/s, the retention time of slurry is controlled to be 30-60 s, the sand can be settled, and mud and other fine particles are driven by flowing slurry to be suspended in the slurry and are brought to subsequent treatment.
The present inventors have the following preferred embodiments in order to realize resource recycling of sand.
In a preferred embodiment, a sand washing device 4 is further disposed beside the grit chamber 3, and the grit chamber 3 further includes a sand feeding mechanism for conveying settled sand to the sand washing device 4, where the sand feeding mechanism includes a sand suction pump 303 that reciprocates longitudinally along the grit zone 302 and a flexible pipeline 305 that communicates the sand suction pump 303 with the sand washing device 4. The sand washing device 4 can adopt a circulating water washing type sand washing device.
Preferably, the bottom of each sand settling zone 302 is provided with symmetrically arranged V-shaped grooves, and the included angle between the wall of the V-shaped groove and the horizontal plane is set to be 50-60 degrees; the sand setting area 302 is also provided with a linear driving mechanism for driving the sand suction pump 303 to reciprocate along the longitudinal direction of the sand setting area 302. The linear driving mechanism can be a winch, and the sand suction pump 303 can be connected to a steel wire rope of the winch to realize movement.
The V-shaped groove is adopted, and the included angle between the tank wall of the V-shaped groove and the horizontal plane is set to be 50-60 degrees based on research and design of the inventor. The sand quick-settling sand pump has the advantages that the sand quick-settling sand can be conveniently settled through the structure and the angle, meanwhile, the sand can be effectively concentrated, and the sand can be efficiently discharged through the sand suction pump 304.
The working principle of the inventor is as follows:
the slurry firstly enters the impurity removing pool 1, and after passing through the water distribution area 101, the slurry is settled in the settling area 102, large-size and heavy easily settled impurities such as stones, bricks, concrete blocks, mud blocks, broken stones, gravel and the like are settled due to the accurate control of the flow rate and the retention time, and sand, mud and other fine particles and light floating impurities are sent to the subsequent treatment. The heavy and heavy impurities which are easy to sink and have large sizes such as settled stones, bricks, concrete blocks, mud blocks, broken stones and gravels are grabbed to the impurity pool 106 by the grab bucket 105 for draining, and then are recovered as building backfill materials.
The slurry after impurity removal enters a water channel, suspended or floating light impurities such as intercepted branches, leaves, plastics, fabrics and the like with larger sizes are conveyed to a belt conveyor through a coarse grating 2 and a rotary mechanical coarse grating dirt separator 202, then conveyed to a garbage yard 204, and then the impurities are conveyed to an urban household garbage disposal system for disposal at regular intervals.
The mud that flows through coarse grid 2 gets into grit chamber 3, through grit chamber water distribution area 301 back, subsides in grit chamber 302, because flow rate and dwell time's accurate control, the sand can be subsided, mud and other tiny particulate matters to and the light floats debris and can send to subsequent processing. The sand suction pump 304 in the sand setting area 302 continuously pumps and conveys the settled sand to a sand washing device for cleaning, and finally, the obtained clean sand is reused.
The slurry after sand setting treatment enters a grid channel 501, passes through a fine grid 5 and is sent to a subsequent treatment unit for further treatment. The rotary mechanical fine grid cleaner 502 can intercept suspended or floating light impurities such as small-sized branches, leaves, plastics, fabrics and the like, discharge the light impurities from the screw press conveyor 503 through the feed opening, and can be provided with a garbage trolley 504 to convey the impurities to the municipal solid waste treatment system for disposal at regular intervals.
A certain engineering slurry treatment plant is provided with 12 sets of dehydration and consolidation integrated systems, 1 set of entering slurry multi-stage impurity removal system and 1 ten thousand meters of daily treatment capacity3(about 80% water content), 300 days of working per year and 300 ten thousand meters of engineering mud treatment capacity per year3(about 80% moisture content, density about 1.14t/m3)。
After the inlet slurry is pretreated by the grading and impurity removing system, the yield and economic analysis of the separated product are as follows:
(1) the impurity removal pool sundries such as stones, bricks, concrete blocks, mud blocks, broken stones, gravel and the like have the average content of about 2 percent and the annual production amount of about 6.84 ten thousand tons, and the impurities do not contain organic garbage such as plastics, branches and the like, so the impurities can be directly sold as engineering backfill, the average unit price is about 30 yuan/ton and the annual income is about 205.2 ten thousand yuan.
(2) The sundries produced by the coarse grids and the fine grids are mainly organic garbage such as plastics, branches and the like, the average total content is about 0.8%, the annual output is about 2.74 ten thousand tons, the sundries are directly transported to an urban domestic garbage incineration power plant for treatment, the average treatment cost is about 50 yuan/t and the annual cost is about 137 thousand yuan due to high calorific value of the separated garbage.
(3) The average content of the sand recovered by the sand washing device is about 5 percent, the annual output is about 17.1 ten thousand tons, the sand can be directly sold as building materials, the average unit price is about 100 yuan/ton, and the annual income is about 1710 ten thousand yuan.
The annual total yield of the separated products reaches 1778.2 ten thousand yuan (205.2-137+ 1710).
If the traditional pretreatment mode is adopted, the separated impurities are in a mixed state, cannot be recycled and can only be transported to a residue soil field. The total annual sundry yield is about 26.68 ten thousand tons, the unit price of outward transportation and disposal is about 35 yuan/ton, and the total treatment cost is 933.7 ten thousand yuan.
Compared with the traditional pretreatment mode, the total investment of the multi-stage impurity removal and resource utilization system is increased by about 150 ten thousand yuan, the annual depreciation cost is about 30 ten thousand yuan, and the annual operation cost is increased by about 50 ten thousand.
Through the analysis, compared with the traditional mode, the yield value can be increased by 2631.9 ten thousand yuan each year in the operation process after the multi-stage impurity removal and resource utilization system is adopted.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides a multistage edulcoration of engineering mud and resourceful system which characterized in that: the impurity removal and resource utilization system comprises an impurity removal tank (1), a coarse grid (2), a grit chamber (3) and a fine grid (5), wherein a water outlet (103) of the impurity removal tank (1) is communicated with a water inlet of the grit chamber (3) through a grid channel, the coarse grid (2) is arranged on the grid channel, and the fine grid is arranged at a water outlet of the grit chamber (3); the impurity removal pool (1) comprises a slope-shaped water distribution area (101) at a water inlet and a settling area (102) behind the water distribution area (101), the flow rate of the settling area (102) is controlled to be 1-1.5 m/s, and the retention time of slurry is controlled to be 10-20 s; the distance between the grid strips of the coarse grid (2) is 15-30 mm, and the distance between the grid strips of the fine grid (5) is 5-10 mm.
2. The multistage impurity removal and resource utilization system for engineering mud as claimed in claim 1, wherein: the slope of water distribution area (101) is 10 ~ 20.
3. The multistage impurity removal and resource utilization system for engineering mud as claimed in claim 2, wherein: the impurity removing pool (1) further comprises a impurity treatment mechanism, and the impurity treatment mechanism comprises a track (104) arranged above the impurity removing pool (1), a movable grab bucket (105) running on the track (104) and an impurity pool (106) for receiving impurities.
4. The multistage impurity removal and resource utilization system for engineering mud as claimed in claim 3, wherein: the sundries pool (106) is a draining pool, a water return pipe (108) is further arranged in the sundries pool (106), one end of the water return pipe (108) is communicated with a water outlet of the sundries pool (106), and the other end of the water return pipe is arranged in the water distribution area (101).
5. The multistage impurity removal and resource utilization system for engineering mud as claimed in claim 1, wherein: a rotary mechanical coarse grid cleaner (202) is arranged on the water channel for mounting the coarse grid (2); and a conveying assembly (203) for conveying garbage is further arranged on the side edge of the water channel, one end of the conveying assembly (203) is positioned at a feed opening of the rotary mechanical coarse grid dirt separator (202), and the other end of the conveying assembly (203) is positioned at a garbage storage yard (204).
6. The multistage impurity removal and resource utilization system for engineering mud as claimed in claim 1, wherein: the grit chamber (3) is including arranging grit chamber water distribution area (301) and a plurality of grit zone (302) that are located grit chamber water distribution area (301) back at water inlet department, the horizontal velocity of flow in grit zone (302) is controlled at 0.1 ~ 0.3m/s, and mud dwell time is controlled at 30 ~ 60 s.
7. The multistage impurity removal and resource utilization system for engineering mud as claimed in claim 6, wherein: sand washing device (4) have still been arranged to grit chamber (3) side, grit chamber (3) still including carry the sand that subsides to sand washing device (4) send sand mechanism, send sand mechanism to include along sand setting district (302) vertical reciprocating motion inhale sand pump (303) and intercommunication inhale sand pump (303) and soft pipeline (305) of sand washing device (4).
8. The multistage impurity removal and resource utilization system for engineering mud of claim 7, wherein: the bottom of each sand settling zone (302) is provided with V-shaped grooves which are symmetrically arranged, and the included angle between the wall of the V-shaped groove and the horizontal plane is set to be 50-60 degrees; the sand setting area (302) is also provided with a linear driving mechanism for driving the sand suction pump (303) to do reciprocating motion along the longitudinal direction of the sand setting area (302).
9. The multistage impurity removal and resource utilization system for engineering mud as claimed in claim 1, wherein: a water outlet of the grit chamber (3) is provided with a grid channel (501), and the rotary mechanical fine grid dirt separator (502) is arranged on the grid channel (501).
10. The multistage impurity removal and resource utilization system for engineering mud according to claim 9, characterized in that: a rotary mechanical fine grid dirt removing machine (502) is installed in the grid channel (501), and a screw press conveyor (503) is installed at a feed opening of the rotary mechanical fine grid dirt removing machine (502).
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| CN113620470A (en) * | 2021-08-25 | 2021-11-09 | 产学研(广州)环境服务有限公司 | Novel mud water purification equipment handles device |
| CN115448557A (en) * | 2022-10-14 | 2022-12-09 | 上海交通建设总承包有限公司 | Treatment system and method for sediment of dredging river channel |
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| CN115448557A (en) * | 2022-10-14 | 2022-12-09 | 上海交通建设总承包有限公司 | Treatment system and method for sediment of dredging river channel |
| CN115448557B (en) * | 2022-10-14 | 2023-07-04 | 上海交通建设总承包有限公司 | System and method for treating sediment of dredging river channel |
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Application publication date: 20210309 |