CN114506996A - Rapid dewatering system and dewatering method for engineering slurry - Google Patents
Rapid dewatering system and dewatering method for engineering slurry Download PDFInfo
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- CN114506996A CN114506996A CN202210132975.4A CN202210132975A CN114506996A CN 114506996 A CN114506996 A CN 114506996A CN 202210132975 A CN202210132975 A CN 202210132975A CN 114506996 A CN114506996 A CN 114506996A
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000007788 liquid Substances 0.000 claims abstract description 121
- 230000018044 dehydration Effects 0.000 claims abstract description 49
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 49
- 238000009826 distribution Methods 0.000 claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 238000001914 filtration Methods 0.000 claims abstract description 30
- 239000002699 waste material Substances 0.000 claims description 65
- 238000011049 filling Methods 0.000 claims description 37
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 11
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 11
- 241001330002 Bambuseae Species 0.000 claims description 11
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 11
- 239000011425 bamboo Substances 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 11
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- 238000005304 joining Methods 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 6
- 239000008394 flocculating agent Substances 0.000 claims description 6
- 238000005381 potential energy Methods 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 238000005189 flocculation Methods 0.000 claims description 4
- 230000016615 flocculation Effects 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims description 4
- 239000010802 sludge Substances 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 239000012466 permeate Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 9
- 208000005156 Dehydration Diseases 0.000 description 43
- 230000008569 process Effects 0.000 description 13
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Classifications
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/13—Supported filter elements
- B01D29/23—Supported filter elements arranged for outward flow filtration
- B01D29/27—Filter bags
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/60—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration
- B01D29/605—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration by level measuring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
- B01D29/90—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/96—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor in which the filtering elements are moved between filtering operations; Particular measures for removing or replacing the filtering elements; Transport systems for filters
-
- 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
Abstract
The invention provides a quick dewatering system and a quick dewatering method for engineering slurry, which comprise a slurry conveying pipeline, a high-position slurry barrel, a slurry distribution pipeline and a water filtering system, wherein the top of the high-position slurry barrel is provided with an opening, the high-position slurry barrel is supported at a high position through a support, the output end of the slurry conveying pipeline is communicated with the high-position slurry barrel, the input end of the slurry distribution pipeline is communicated with the bottom of the high-position slurry barrel, the output end of the slurry distribution pipeline is communicated with the water filtering system, and the slurry distribution pipeline also comprises a gate valve. The principle that the pressure of liquid is increased along with the increase of the depth of the liquid is utilized, and the high-level mud barrel is combined with the water filtering system, so that the liquid level depth of the whole mud dewatering system is obviously improved, the pressure of mud in the bag body is greatly increased, and the dewatering efficiency is improved. The invention has simple structure, simple and convenient operation and low maintenance, the whole system consists of a plurality of parts which are easy to disassemble and assemble, the replacement and the maintenance are convenient, the scheme can be flexibly adjusted according to the treatment capacity and the site conditions, and the slurry dehydration efficiency is improved.
Description
Technical Field
The invention belongs to the technical field of engineering slurry treatment, and particularly relates to a rapid engineering slurry dehydration system and a dehydration method.
Background
The engineering mud such as river and lake silt, construction waste mud, municipal sludge and the like has the characteristics of large quantity, high water content, difficult direct stockpiling and utilization and the like. The dehydration of the geotube bag is a mud dehydration treatment technology which combines mud flocculation precipitation and the dehydration and filtration of the geotube bag, and the basic principle is as follows: the slurry after flocculation pretreatment is poured into a geotextile tube bag sewn by geotextiles, and water in the slurry seeps out from gaps of the geotextiles under the action of external force such as self weight of the slurry, tension of bag walls, external loading and the like, so that the aim of quickly dewatering, reducing volume and drying is fulfilled. The geotextile tube bag used for dehydration and consolidation of slurry has the advantages of simple and convenient operation, low manufacturing cost, flexibility, large treatment capacity and the like, and is widely applied to dehydration, consolidation and reduction treatment of high-water-content engineering slurry.
The traditional slurry dehydration and consolidation by utilizing the geotextile tube bags has the following problems: filling the slurry into the geotechnical pipe bag, wherein the slurry is required to be filled for multiple times in the whole process so as to ensure that the filling degree reaches more than 80%; under the action of gravity and bag wall tension, water in the slurry is filtered out, and the water filtering rate is slower and slower along with the continuous dehydration process; along with the reduction of the water content of the slurry in the geotechnical pipe bag, the slurry is converted from a saturated state to an unsaturated state, the pore pressure is not continuous any more, and the slurry in the pipe bag is only solidified under the self-weight stress at the moment. The traditional geotechnical pipe bag dehydration consolidation method has the disadvantages of slow dehydration speed, long treatment period and greatly influenced treatment efficiency. The existing technology for improving the traditional geotube bag comprises the modes of vacuumizing, pressurizing, external loading and the like in the geotube bag, and although the speed of slurry dehydration and consolidation can be improved to a certain extent, the modes have the problems of complex device structure, complex operation, easy blockage of an internal drainage structure and the like.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the rapid engineering slurry dewatering system and the rapid engineering slurry dewatering method which have the advantages of simple structure, simple and convenient operation, low maintenance, flexible adjustment scheme according to the treatment capacity and the site conditions, improvement of the slurry dewatering efficiency, time saving and labor saving.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a quick dewatering system of engineering mud, includes mud conveying pipeline, a high-order mud section of thick bamboo, joins in marriage thick liquid pipeline and drainage system, a high-order mud section of thick bamboo includes open-top, a high-order mud section of thick bamboo supports in the high position through the support, a high-order mud section of thick bamboo space is higher than drainage system, mud conveying pipeline's output and a high-order mud section of thick bamboo intercommunication, join in marriage the input intercommunication high-order mud section of thick bamboo bottom of thick bamboo of thick liquid pipeline, join in marriage the output intercommunication drainage system of thick liquid pipeline, it still contains the gate valve to join in marriage the thick liquid pipeline.
Further, including level sensor in the high-order mud section of thick bamboo, high-order mud section of thick bamboo still includes high liquid level point H1 and low liquid level point H2, mud pipeline includes the automatic control valve with level sensor electric connection. The opening and closing of the automatic control valve are controlled by the liquid level sensor, when the liquid level in the high-level mud barrel is located at a high liquid level point H1, the automatic control valve is closed, the waste mud is stopped being injected into the high-level mud barrel, when the liquid level reaches a low liquid level point H2, the automatic control valve is opened, the waste mud is continuously injected into the high-level mud barrel, and therefore the labor can be saved.
Further, the water filtration system includes filter bag and flow guide box, high-order mud drum sets up in flow guide box top, the flow guide box is the cavity box that one side swing joint has the apron that can open and shut, one side that the apron was kept away from to the bottom in the flow guide box includes the slot, the filter bag sets up in the flow guide box and its top including passing the connector of flow guide box and joining in marriage the output intercommunication of thick liquid pipeline. The guide box is used for placing the filter bag so as to facilitate the grouting operation of the waste slurry, the high-level slurry cylinder is erected at the top of the guide box and can be used for grouting into the high-level slurry cylinder through a slurry conveying pipeline, when the designed filling degree is reached in the filter bag and the liquid level in the high-level slurry cylinder reaches a high liquid level point H1, the pressure of the slurry on the inner wall of the filter bag reaches an extreme value at the moment because the hydrostatic pressure is dependent on the height of the liquid, the filtering process of the slurry is promoted by the higher pressure difference between the inside and the outside, in addition, as a certain amount of waste slurry is stored in the high-level slurry cylinder, the filter bag can be supplemented in real time in the continuous discharging process of the filtrate, the higher filling degree of the filter bag is maintained, the filtered filtrate is collected and discharged by the groove, the openable cover plate is convenient for taking out the filter bag for subsequent transportation or further treatment, meanwhile, the filter bag is convenient to replace, the operation is simple and convenient, and the slurry dewatering efficiency can be improved, is simple and practical.
Furthermore, still include the spacing frame that is used for restricting the filter bag position in the flow guide box, spacing frame open-top, the bottom can slide along the slide rail that sets up in the flow guide box bottom, the apron flow guide box is articulated, the apron can be followed the articulated department and rolled over and open. Spacing frame is used for restricting the biggest filling volume of filter bag, avoids the filter bag displacement to appear, rolls in the expansion process, and then laminating water conservancy diversion incasement wall, blocks up probably to influence filterable situation such as slot, and the slide rail conveniently takes out or changes the filter bag, simple structure, and is easy and simple to handle, convenient and practical, labour saving and time saving.
Further, still include dehydration place and fill the pipeline, water filtration system includes a plurality of filter bags, and is a plurality of the filter bag is arranged in dehydration place surface, join in marriage the thick liquid pipeline and still include the confession thick liquid main pipe and a plurality of branch pipes of joining in marriage of mutual intercommunication, the input intercommunication high-order mud thick liquid bobbin base portion of joining in marriage the thick liquid main pipe, every the output of joining in marriage the thick liquid branch pipe all communicates a filter bag, fill the pipeline in proper order with each the filter bag intercommunication, the support supports high-order mud thick liquid bobbin in the position that is higher than the filter bag, the dehydration place still includes the water conservancy diversion ditch that sets up near the filter bag. When the treatment capacity is large or the site condition is sufficient, the structure of the dehydration system is adjusted according to the requirement, the filter bag is used for carrying out slurry transportation by using the filling pipeline, the high-level slurry barrel is used for carrying out slurry transportation by using the slurry transportation pipeline, when the two reach the maximum value, the gate valve is opened, the tower frame is erected to the high-level slurry barrel to ensure that the bottom of the high-level slurry barrel is higher than the filter bag, the liquid level height of the whole system reaches the maximum value by utilizing the principle that the self gravity is combined with the liquid pressure intensity to be increased along with the increase of the liquid depth, the waste slurry in the high-level slurry barrel is communicated with the waste slurry in the filter bag through the slurry distribution main pipe and the slurry distribution branch pipe, the slurry pressure intensity in the filter bag is further strengthened, the effect of promoting the slurry filtration process is further achieved, the dehydration efficiency can be greatly improved, the structure of the slurry distribution pipeline is combined with a plurality of filter bags, and can carry out dehydration treatment on a large amount of waste slurry at one time, time and labor are saved, and the whole device is small in size, light, practical and simple and convenient to operate because the slurry filling and the slurry preparation are mutually independent.
Further, the bottom of the high-position mud cylinder is bucket-shaped. The hopper-shaped structure can prevent large-particle flocs in the slurry from silting at the bottom.
The invention also provides a dehydration method of the engineering slurry rapid dehydration system, which comprises the following steps:
s1, lifting potential energy of the waste slurry through a slurry pump, fully mixing and flocculating the waste slurry with a flocculating agent, injecting the waste slurry into a high-level slurry barrel through a slurry conveying pipeline, keeping a gate valve in a normally open state, allowing the waste slurry entering the high-level slurry barrel to enter a filter bag positioned in a limiting frame through a slurry distribution pipeline, intercepting slurry particle flocs into the filter bag along with the filtering, allowing excessive water to permeate through pores of the filter bag, and collecting and discharging the permeated liquid at a groove at the bottom of a diversion box;
s2, continuously filling the waste slurry until the filter bag reaches the maximum filling degree, and continuously conveying the waste slurry into the high-level slurry barrel to enable the liquid level to rise to a high-level point H1;
s3, the liquid level sensor sends a closing signal to the automatic control valve to stop grouting;
s4, when the liquid level in the high-level mud barrel is lowered to a low liquid level point H2 along with the filtering, the liquid level sensor sends an opening signal to the automatic control valve, the waste mud is continuously conveyed through the mud conveying pipeline until the waste mud reaches a high liquid level point H1, and the step S3 is repeated;
s5, when the water content of the sludge in the filter bag is reduced to a preset dehydration effect, closing the gate valve, closing and taking down the input port of the filter bag, opening the cover plate, integrally drawing out the limiting frame and the filter bag from the flow guide box through the slide rail, cleaning filter residues in the filter bag, carrying out subsequent treatment on the filter bag, replacing the new filter bag and resetting the limiting frame, connecting the filter bag with the output end of the slurry preparation pipeline, and repeating the steps S1-S4.
The invention also provides another dehydration method of the engineering mud rapid dehydration system, which comprises the following steps:
s1, lifting potential energy of the waste slurry through a slurry pump, fully mixing and flocculating the waste slurry with a flocculating agent, directly injecting the waste slurry into a plurality of filter bags through filling pipelines for filling, and collecting and discharging slurry filtrate through a diversion trench on a dewatering site;
s2, injecting part of waste slurry into a high-level slurry barrel through a slurry conveying pipeline, wherein the high-level slurry barrel is communicated with a filter bag through a slurry distribution pipeline, the gate valve is in a closed state, and when the liquid level reaches a high liquid level point H1, the liquid level sensor sends a closing signal to the automatic control valve to stop grouting;
s3, stopping conveying the waste slurry by the filling pipeline when the filter bag reaches the designed filling height, and sealing the interface between the filter bag and the filling pipeline;
s4, opening the ports of the gate valve and the slurry distribution branch pipe, and communicating the waste slurry in the high-level slurry barrel with the waste slurry in the filter bag through the slurry distribution main pipe and the slurry distribution branch pipe under the action of self weight;
s5, when the liquid level of the high-level mud barrel falls to a low liquid level point H2, the liquid level sensor sends an opening signal to the automatic control valve, waste mud is conveyed continuously through the mud conveying pipeline until the liquid level reaches a high liquid level point H1, at the moment, the liquid level sensor sends a closing signal to the automatic control valve, injection of the waste mud is stopped, the automatic control valve is controlled circularly along with liquid level change, and the filling degree in the filter bag is guaranteed;
s6, when the water content of the slurry in the filter bag is reduced to a preset dehydration effect, closing the gate valve, cleaning the filter residue in the filter bag, and carrying out subsequent treatment on the filter residue.
Compared with the prior art, the invention has the beneficial effects that:
the invention has simple structure, simple operation and low maintenance, the whole system consists of a plurality of parts which are easy to disassemble and assemble, the replacement and the maintenance are convenient, the scheme can be flexibly adjusted according to the treatment capacity and the site conditions, the slurry dehydration efficiency is improved, and the time and the labor are saved. The principle that the pressure of liquid is increased along with the increase of the depth of the liquid is utilized, the high-level mud barrel is combined with the water filtering system, so that the liquid level depth of the whole mud dewatering system is obviously improved, the pressure of the mud in the bag body is greatly increased, meanwhile, in the whole dewatering process, higher pressure in the filter bag is maintained, the dewatering efficiency is improved, meanwhile, the whole device can be respectively replaced and maintained, and the maintenance cost is low; the cooperation of the high-level mud barrel, the liquid level sensor and the automatic control valve can ensure that the volume of mud in the filter bag is always kept at a higher level, and the labor intensity of field workers is reduced while a larger pressure difference inside and outside the bag body is maintained, so that time and labor are saved; the device can be flexibly adjusted according to different field operation conditions, and has stronger popularization by adopting different embodiments to carry out dehydration treatment according to local conditions in projects with limited space, smaller and more dispersed engineering slurry yield, urban areas and the like and under the conditions of large treatment capacity, more concentrated slurry and available open sites nearby.
Drawings
Fig. 1 is a schematic overall structure diagram of an embodiment of the present invention.
Fig. 2 is a schematic overall structure diagram of the second embodiment of the present invention.
The device comprises a slurry conveying pipeline 1, an automatic control valve 11, a high-position slurry barrel 2, a liquid level sensor 21, a support 22, a slurry distribution pipeline 3, a gate valve 31, a slurry distribution main pipe 32, a slurry distribution branch pipe 33, a filter bag 4, a flow guide box 5, a limiting frame 51, a slide rail 52, a slide rail 53, a cover plate 54, a groove 6, a filling pipeline 7, a dewatering site 7 and a flow guide groove 71.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention is further illustrated by the following examples, which are not to be construed as limiting the invention.
Engineering mud quick dewatering system shown in the figure, including mud conveying pipeline 1, high-order mud barrel 2, join in marriage thick liquid pipeline 3 and filtration system, 2 open-tops on the high-order mud barrel, high-order mud barrel 2 supports in high-order through support 22, high-order mud barrel 2 is higher than filtration system on the space, the output and the high-order mud barrel 2 intercommunication of mud conveying pipeline 1, join in marriage the input intercommunication high-order mud barrel 2 bottoms of thick liquid pipeline 3, join in marriage the output intercommunication filtration system of thick liquid pipeline 3, it still contains gate valve 31 to join in marriage thick liquid pipeline 3. The principle that the pressure of liquid is increased along with the increase of the depth of the liquid is utilized, the high-level mud barrel is combined with the water filtering system, so that the liquid level depth of the whole mud dewatering system is obviously improved, the pressure of the mud in the bag body is greatly increased, meanwhile, in the whole dewatering process, higher pressure in the filter bag is maintained, the dewatering efficiency is improved, meanwhile, the whole device can be respectively replaced and maintained, and the maintenance cost is low; the cooperation of the high-level mud barrel, the liquid level sensor and the automatic control valve can ensure that the volume of mud in the filter bag is always kept at a higher level, and the labor intensity of field workers is reduced while a larger pressure difference inside and outside the bag body is maintained, so that time and labor are saved; the device can be flexibly adjusted according to different field operation conditions, and has stronger popularization by adopting different embodiments to carry out dehydration treatment according to local conditions in projects with limited space, smaller and more dispersed engineering slurry yield, urban areas and the like and under the conditions of large treatment capacity, more concentrated slurry and available open sites nearby. The invention has simple structure, simple operation and low maintenance, the whole system consists of a plurality of parts which are easy to disassemble and assemble, the replacement and the maintenance are convenient, the scheme can be flexibly adjusted according to the treatment capacity and the site conditions, the slurry dehydration efficiency is improved, and the time and the labor are saved.
Preferably, the high level mud drum 2 comprises a liquid level sensor 21, the high level mud drum 2 further comprises a high liquid level point H1 and a low liquid level point H2, and the mud conveying pipeline 1 comprises an automatic control valve 11 electrically connected with the liquid level sensor 21. The opening and closing of the automatic control valve are controlled through the liquid level sensor, when the liquid level in the high-position mud barrel is at a high liquid level point H1, the automatic control valve is closed, the injection of the waste mud into the high-position mud barrel is stopped, when the liquid level reaches a low liquid level point H2, the automatic control valve is opened, the waste mud continues to be injected into the high-position mud barrel, and therefore labor can be saved.
Preferably, the water filtering system comprises a filter bag 4 and a flow guide box 5, the high-position mud drum 2 is arranged at the top of the flow guide box 5, the flow guide box 5 is a hollow box body, one side of the hollow box body is movably connected with a cover plate 53 which can be opened and closed, one side of the bottom of the flow guide box 5, which is far away from the cover plate 53, comprises a groove 54, the filter bag 4 is arranged in the flow guide box 5, and the top of the filter bag comprises a connecting port which penetrates through the flow guide box 5 and is communicated with the output end of the slurry distribution pipeline 3. As shown in fig. 1, in the first embodiment of the present invention, a guide box is used to place a filter bag for performing a slurry injection operation of waste slurry, a high level mud barrel is erected on the top of the guide box, slurry can be injected into the high level mud barrel through a slurry delivery pipeline, when the designed filling degree is reached in the filter bag and the liquid level in the high level mud barrel reaches a high liquid level H1, the pressure of the slurry on the inner wall of the filter bag reaches an extreme value at this time because the magnitude of the hydrostatic pressure depends on the height of the liquid, the filtering process of the slurry is promoted by the higher pressure difference between the inside and the outside, in addition, since the high level mud barrel stores a certain amount of waste slurry, the filter bag can be supplemented in real time during the continuous discharging process of the filtrate, the higher filling degree of the filter bag is maintained, the filtrate filtered by the trench is conveniently collected and discharged, the filter bag can be conveniently taken out by an openable cover plate for subsequent transportation or further processing, and a new filter bag can be conveniently replaced, simple and convenient operation, can improve the dehydration efficiency of the slurry, and is simple and practical.
Preferably, the guide box 5 further comprises a limiting frame 51 for limiting the position of the filter bag 4, the top of the limiting frame 51 is open, the bottom of the limiting frame can slide along a slide rail 52 arranged at the bottom in the guide box 5, the cover plate 53 is hinged to the guide box 5, and the cover plate 53 can be folded and opened along the hinged position. Spacing frame is used for restricting the biggest filling volume of filter bag, avoids the filter bag displacement to appear, rolls in the expansion process, and then laminating water conservancy diversion incasement wall, blocks up probably to influence filterable situation such as slot, and the slide rail conveniently takes out or changes the filter bag, simple structure, and is easy and simple to handle, convenient and practical, labour saving and time saving.
Preferably, the water filtering system comprises a dewatering field 7 and a filling pipeline 6, the water filtering system comprises a plurality of filter bags 4, the filter bags 4 are arranged on the surface of the dewatering field 7, the slurry distribution pipeline 3 further comprises a slurry distribution main pipe 32 and a plurality of slurry distribution branch pipes 33 which are communicated with each other, the input end of the slurry distribution main pipe 32 is communicated with the bottom of the high-position slurry cylinder 2, the output end of each slurry distribution branch pipe 33 is communicated with one filter bag 4, the filling pipeline 6 is communicated with each filter bag 4 in sequence, the support 22 supports the high-position slurry cylinder 2 at a position higher than the filter bags 4, and the dewatering field 7 further comprises a flow guide groove 71 arranged near the filter bags 4. As shown in fig. 2, when the treatment capacity is large or the site conditions are sufficient, the structure of the dewatering system is adjusted as required, the dewatering operation is performed by adopting the structure of the second embodiment, the filling pipeline is used for conveying the filter bag with the slurry, the slurry conveying pipeline is used for conveying the slurry to the high-level slurry barrel, when the two reach the maximum value, the gate valve is opened, the tower frame is erected on the high-level slurry barrel to enable the bottom of the high-level slurry barrel to be higher than the filter bag, the self gravity is combined with the principle that the liquid pressure is increased along with the increase of the liquid depth, the self-weight action of the high-level slurry barrel enables the waste slurry in the high-level slurry barrel to be communicated with the waste slurry in the filter bag through the slurry distribution main pipe and the slurry distribution branch pipe, at the moment, the liquid level height of the whole system reaches the maximum value, the slurry pressure in the filter bag is further strengthened, the effect of promoting the slurry filtering process is achieved, the dewatering efficiency is greatly improved, the structure of the slurry distribution pipeline is combined with a plurality of the filter bags, can once only carry out dehydration to a large amount of abandonment mud, labour saving and time saving because mud fills and joins in marriage thick liquid mutually independent, whole device is small, light practical, easy and simple to handle.
Preferably, the bottom of the high level mud bucket 2 is bucket-shaped. The hopper-shaped structure can prevent large-particle flocs in the slurry from silting at the bottom.
Preferably, the high level mud bucket 2 is not limited to a cylindrical shape, and can be a container with an upper opening in any shape; the high-level mud cylinder 2 can select the set point position, height and fixing mode according to local conditions, and only enough level difference between the high-level mud cylinder and the filter bag needs to be ensured; the first embodiment can be combined with a vehicle carrier to realize more flexible operation; the second embodiment can be used for connecting a plurality of waste slurry quick dehydration systems in series or in parallel, and facilitates the dehydration operation of larger amount of slurry.
Preferably, the filter bag 4 is a geotextile tube bag or a recyclable filter cloth, and has sufficient material strength and good permeability.
Aiming at the first embodiment, the invention also designs a dehydration method of the engineering mud rapid dehydration system, which comprises the following steps:
s1, lifting potential energy of waste slurry through a slurry pump, fully mixing and flocculating the waste slurry with a flocculating agent, injecting the waste slurry into a high-level slurry barrel 2 through a slurry conveying pipeline 1, keeping a gate valve 31 in a normally open state, allowing the waste slurry entering the high-level slurry barrel 2 to enter a filter bag 4 in a limiting frame 51 through a slurry distribution pipeline 3, intercepting slurry particle flocs into the filter bag 4 along with the filtering, allowing excessive water to permeate through pores of the filter bag 4, and collecting and discharging the permeated liquid at a groove 54 at the bottom of a diversion box 5;
s2, continuously filling the waste slurry until the filter bag 4 reaches the maximum fullness, continuously conveying the waste slurry into the high-level slurry barrel 2, slowly accumulating the slurry in the high-level slurry barrel 2 after the slurry overflows the slurry distribution pipeline 3, and raising the liquid level to a high-level point H1;
s3, the liquid level sensor 21 sends a closing signal to the automatic control valve 11, grouting is stopped, the liquid level in the high-level mud drum 2 reaches a high liquid level point H1, the liquid level in the whole system reaches the maximum value at the moment because the magnitude of hydrostatic pressure depends on the height of liquid, the volume of the filter bag 4 reaches the maximum value, the pressure of mud on the inner wall of the filter bag 4 also reaches an extreme value, the higher pressure difference between the inside and the outside of the pipe bag promotes the filtering process of the mud, in addition, as the high-level mud drum 2 stores a certain amount of mud, the filter bag 4 can be supplemented in real time in the process of continuously discharging filtrate, and the higher fullness of the filter bag 4 is maintained;
s4, when the liquid level in the high-level mud barrel 2 drops to a low liquid level point H2 along with the filtering, the liquid level sensor 21 sends an opening signal to the automatic control valve 11, the waste mud is continuously conveyed through the mud conveying pipeline 1 until the waste mud reaches a high liquid level point H1, and the step S3 is repeated;
s5, judging the dehydration progress of the slurry by observing the discharge speed of percolate in the groove 54 or the liquid level reduction speed of the high-level slurry barrel 2, closing the gate valve 31 when the water content of the sludge in the filter bag 4 is reduced to a preset dehydration effect, closing and taking down the input port of the filter bag 4, opening the cover plate 53, integrally drawing out the limiting frame 51 together with the filter bag 4 from the guide box 5 through the slide rail 52, cleaning filter residues in the filter bag 4, carrying out subsequent treatment on the filter residues, replacing the new filter bag 4, resetting the limiting frame 51, connecting the filter bag 4 with the output end of the slurry distribution pipeline 3, and repeating the steps S1-S4.
Aiming at the second embodiment, the invention also designs another dehydration method of the engineering mud rapid dehydration system, which comprises the following steps:
s1, lifting potential energy of the waste slurry through a slurry pump, fully mixing and flocculating the waste slurry with a flocculating agent, directly injecting the waste slurry into a plurality of filter bags 4 through a filling pipeline 6 for filling, and collecting and discharging slurry filtrate through a diversion trench 71 on a dehydration site 7;
s2, injecting part of waste slurry into the high-level slurry barrel 2 through the slurry conveying pipeline 1, wherein the high-level slurry barrel 2 is communicated with the filter bag 4 through the slurry distribution pipeline 3, the gate valve 31 is in a closed state at the moment, and when the liquid level reaches a high liquid level point H1, the liquid level sensor 21 sends a closing signal to the automatic control valve 11 to stop grouting;
s3, stopping conveying the waste slurry by the filling pipeline 6 when the filter bag 4 reaches the designed filling height, and sealing the interface between the filter bag 4 and the filling pipeline 6;
s4, opening the joints of the gate valve 31 and the slurry distribution branch pipe 33, and communicating the waste slurry in the high-level slurry barrel 2 with the waste slurry in the filter bag 4 through the slurry distribution main pipe 32 and the slurry distribution branch pipe 33 under the action of self weight;
s5, when the liquid level of the high-level mud barrel 2 drops to a low liquid level point H2, the liquid level sensor 21 sends an opening signal to the automatic control valve 11, waste mud is continuously conveyed through the mud conveying pipeline 1 until the high liquid level point H1 is reached, at the moment, the liquid level sensor 21 sends a closing signal to the automatic control valve 11, injection of the waste mud is stopped, the automatic control valve 11 is controlled circularly along with liquid level change, and the filling degree in the filter bag 4 is guaranteed;
s6, judging the dehydration progress of the slurry by observing the discharge speed of the percolate in the diversion trench 71 or the liquid level reduction speed of the high-level slurry barrel 2, closing the gate valve 31 when the water content of the slurry in the filter bag 4 is reduced to a preset dehydration effect, cleaning the filter residue in the filter bag 4, and carrying out subsequent treatment on the filter residue.
The invention can be flexibly adjusted according to different field operation conditions, and can rapidly carry out preliminary dehydration and transportation on the waste slurry by adopting the mode of the first embodiment in the projects with limited space, small engineering slurry yield and more dispersion, such as urban areas and the like; under the conditions of large treatment capacity, concentrated slurry and available open field nearby, the method of the second embodiment can be adopted to continuously promote the dehydration of the slurry in the field; aiming at different field conditions, the invention can be adjusted according to local conditions and has stronger popularization.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (8)
1. The utility model provides a quick dewatering system of engineering mud which characterized in that: the high-position mud slurry mixing device is characterized by comprising a mud slurry conveying pipeline (1), a high-position mud slurry barrel (2), a mud slurry mixing pipeline (3) and a water filtering system, wherein the top of the high-position mud slurry barrel (2) is open, the high-position mud slurry barrel (2) is supported at a high position through a support (22), the high-position mud slurry barrel (2) is spatially higher than the water filtering system, the output end of the mud slurry conveying pipeline (1) is communicated with the high-position mud slurry barrel (2), the input end of the mud slurry mixing pipeline (3) is communicated with the bottom of the high-position mud slurry barrel (2), the output end of the mud slurry mixing pipeline (3) is communicated with the water filtering system, and the mud slurry mixing pipeline (3) further comprises a gate valve (31).
2. The engineering mud rapid dewatering system of claim 1, characterized in that: the high-level mud barrel (2) comprises a liquid level sensor (21), the high-level mud barrel (2) further comprises a high liquid level point H1 and a low liquid level point H2, and the mud conveying pipeline (1) comprises an automatic control valve (11) electrically connected with the liquid level sensor (21).
3. The engineering mud rapid dewatering system of claim 2, characterized in that: the water filtering system comprises a filter bag (4) and a flow guide box (5), the high-position mud cylinder (2) is arranged at the top of the flow guide box (5), the flow guide box (5) is a hollow box body with an openable cover plate (53) movably connected to one side, one side of the cover plate (53) far away from the bottom in the flow guide box (5) comprises a groove (54), the filter bag (4) is arranged in the flow guide box (5) and the top of the filter bag comprises a connecting port which penetrates through the flow guide box (5) and is communicated with the output end of the slurry distribution pipeline (3).
4. The rapid dewatering system for engineering mud according to claim 3, wherein: still include spacing frame (51) that are used for restricting filter bag (4) position in water conservancy diversion case (5), spacing frame (51) open-top, bottom can be followed and set up slide rail (52) the slip of bottom in water conservancy diversion case (5), apron (53) are articulated with water conservancy diversion case (5), apron (53) can be followed articulated department and rolled over and open.
5. The engineering mud rapid dewatering system of claim 2, characterized in that: still including dehydration place (7) and filling pipeline (6), water filtration system includes a plurality of filter bags (4), and is a plurality of filter bag (4) are arranged on dehydration place (7) surface, join in marriage thick liquid pipeline (3) and still include joining in marriage thick liquid main pipe (32) and a plurality of branch pipe (33) of joining in marriage of mutual intercommunication, the input intercommunication high-order thick liquid section of thick bamboo (2) bottom of joining in marriage thick liquid main pipe (32), every the output of joining in marriage thick liquid branch pipe (33) all communicates one filter bag (4), fill pipeline (6) in proper order with each filter bag (4) intercommunication, support (22) support high-order thick liquid section of thick bamboo (2) in the position that is higher than filter bag (4), dehydration place (7) still include set up in near water conservancy diversion ditch (71) of filter bag (4).
6. The rapid dewatering system for engineering mud according to any one of claims 1-5, wherein: the bottom of the high-level mud barrel (2) is bucket-shaped.
7. The dewatering method of the engineering mud rapid dewatering system according to claim 4, characterized by comprising the following steps:
s1, lifting potential energy of waste slurry through a slurry pump, fully finishing mixing flocculation with a flocculating agent, injecting the waste slurry into a high-level slurry barrel (2) through a slurry conveying pipeline (1), keeping a gate valve (31) in a normally open state, enabling the waste slurry entering the high-level slurry barrel (2) to enter a filter bag (4) in a limiting frame (51) through a slurry distribution pipeline (3), intercepting slurry particle flocs into the filter bag (4) along with the filtering, enabling redundant moisture to permeate through pores of the filter bag (4), and collecting and discharging the permeated liquid at a groove (54) at the bottom of a diversion box (5);
s2, continuously filling the waste slurry until the filter bag (4) reaches the maximum fullness, and continuously conveying the waste slurry into the high-level slurry barrel (2) to enable the liquid level to rise to a high-level point H1;
s3, the liquid level sensor (21) sends a closing signal to the automatic control valve (11) to stop grouting;
s4, when the liquid level in the high-level mud barrel (2) is lowered to a low liquid level point H2, the liquid level sensor (21) sends an opening signal to the automatic control valve (11), waste mud is conveyed continuously through the mud conveying pipeline (1) until the waste mud reaches a high liquid level point H1, and the step S3 is repeated;
s5, when the water content of the sludge in the filter bag (4) is reduced to a preset dehydration effect, closing the gate valve (31), closing and taking down the input port of the filter bag (4), opening the cover plate (53), integrally drawing out the limiting frame (51) and the filter bag (4) from the diversion box (5) through the slide rail (52), cleaning filter residues in the filter bag (4), carrying out subsequent treatment on the filter residues, replacing the new filter bag (4) and resetting the limiting frame (51), connecting the filter bag (4) with the output end of the slurry distribution pipeline (3), and repeating the steps S1-S4.
8. The dewatering method of the engineering mud rapid dewatering system according to claim 5, characterized by comprising the following steps:
s1, lifting potential energy of the waste slurry through a slurry pump, fully finishing mixing flocculation with a flocculating agent, directly injecting the waste slurry into a plurality of filter bags (4) through a filling pipeline (6) for filling, and collecting and discharging slurry filtrate through a flow guide groove (71) on a dewatering site (7);
s2, injecting part of waste slurry into a high-level slurry barrel (2) through a slurry conveying pipeline (1), wherein the high-level slurry barrel (2) is communicated with a filter bag (4) through a slurry distribution pipeline (3), the gate valve (31) is in a closed state, and when the liquid level reaches a high liquid level point H1, the liquid level sensor (21) sends a closing signal to the automatic control valve (11) to stop grouting;
s3, stopping conveying the waste slurry by the filling pipeline (6) when the filter bag (4) reaches the designed filling height, and sealing the interface between the filter bag (4) and the filling pipeline (6);
s4, opening the joints of the gate valve (31) and the slurry distribution branch pipe (33), and communicating the waste slurry in the high-level slurry barrel (2) with the waste slurry in the filter bag (4) through the slurry distribution main pipe (32) and the slurry distribution branch pipe (33) under the action of self weight;
s5, when the liquid level of the high-level mud barrel (2) is lowered to a low liquid level point H2, the liquid level sensor (21) sends an opening signal to the automatic control valve (11), waste mud is continuously conveyed through the mud conveying pipeline (1) until the high liquid level point H1 is reached, at the moment, a closing signal is sent to the automatic control valve (11) through the liquid level sensor (21), injection of the waste mud is stopped, the automatic control valve (11) is controlled in a circulating mode along with liquid level change, and the filling degree in the filter bag (4) is guaranteed;
s6, when the water content of the slurry in the filter bag (4) is reduced to a preset dehydration effect, closing the gate valve (31), cleaning the filter residue in the filter bag (4), and carrying out subsequent treatment on the filter residue.
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