CN114506996B - Engineering slurry rapid dehydration system and dehydration method - Google Patents
Engineering slurry rapid dehydration system and dehydration method Download PDFInfo
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- CN114506996B CN114506996B CN202210132975.4A CN202210132975A CN114506996B CN 114506996 B CN114506996 B CN 114506996B CN 202210132975 A CN202210132975 A CN 202210132975A CN 114506996 B CN114506996 B CN 114506996B
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- 239000002002 slurry Substances 0.000 title claims abstract description 239
- 238000006297 dehydration reaction Methods 0.000 title claims abstract description 60
- 230000018044 dehydration Effects 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000007788 liquid Substances 0.000 claims abstract description 118
- 238000009826 distribution Methods 0.000 claims abstract description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000001914 filtration Methods 0.000 claims abstract description 26
- 239000002699 waste material Substances 0.000 claims description 56
- 238000011049 filling Methods 0.000 claims description 39
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 22
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 22
- 241001330002 Bambuseae Species 0.000 claims description 22
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 22
- 239000011425 bamboo Substances 0.000 claims description 22
- 238000007599 discharging Methods 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 9
- 239000000706 filtrate Substances 0.000 claims description 8
- 238000005189 flocculation Methods 0.000 claims description 8
- 230000016615 flocculation Effects 0.000 claims description 8
- 239000008394 flocculating agent Substances 0.000 claims description 7
- 238000004140 cleaning Methods 0.000 claims description 6
- 238000005304 joining Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 238000005381 potential energy Methods 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 239000010802 sludge Substances 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000012466 permeate Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000007306 turnover Effects 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 9
- 208000005156 Dehydration Diseases 0.000 description 50
- 230000008569 process Effects 0.000 description 11
- 238000007596 consolidation process Methods 0.000 description 5
- 239000004746 geotextile Substances 0.000 description 3
- 230000002706 hydrostatic effect Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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 rapid engineering slurry dehydration system and a rapid engineering slurry dehydration method, wherein the rapid engineering slurry dehydration system comprises a slurry conveying pipeline, a high-level slurry cylinder, a slurry distribution pipeline and a water filtering system, wherein the top of the high-level slurry cylinder is opened, the high-level slurry cylinder is supported at a high position through a support, the output end of the slurry conveying pipeline is communicated with the high-level slurry cylinder, the input end of the slurry distribution pipeline is communicated with the bottom of the high-level slurry cylinder, the output end of the slurry distribution pipeline is communicated with the water filtering system, and the slurry distribution pipeline further comprises a gate valve. The principle that the pressure of liquid increases along with the increase of the liquid depth is utilized, and the high-level slurry cylinder is combined with the water filtering system, so that the liquid level depth of the whole slurry dewatering system is obviously improved, the pressure of slurry 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 condition, and the mud dewatering 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 rapid engineering slurry dehydration method.
Background
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 piling and utilization and the like. The geotechnical pipe bag dehydration is a mud dehydration treatment technology combining mud flocculation precipitation with geotechnical pipe bag dehydration filtration, and the basic principle is as follows: the mud subjected to flocculation pretreatment is poured into a geotextile bag sewn by geotextiles, and water in the mud is oozed out from gaps of the geotextiles under the action of external forces such as the dead weight of the mud, the tension of the bag wall, external loading and the like, so that the aims of rapid dehydration, volume reduction and drying are fulfilled. The geotechnical pipe bag used for the dehydration and consolidation of the slurry has the advantages of simple and convenient operation, low manufacturing cost, flexibility, large treatment capacity and the like, and is widely applied to the dehydration and consolidation reduction treatment of the engineering slurry with high water content.
The conventional slurry dehydration and consolidation by using the geotechnical pipe bag has the following problems: filling mud into the geotechnical pipe bags, wherein the whole process needs to be filled for multiple times to ensure that the filling degree reaches more than 80%; under the action of gravity and bag wall tension, the water in the slurry is filtered out, and the water filtering rate is slower and slower as the dehydration process is continued; as the water content of the slurry in the geotechnical pipe bag is reduced, the slurry is changed from a saturated state to a non-saturated state, the pore pressure is not continuous any more, and the slurry in the pipe bag is solidified only under the self-weight stress. The traditional geotechnical pipe bag dehydration and consolidation method has the defects of low dehydration speed, long treatment period and greatly influenced treatment efficiency. The existing technology for improving the traditional geotechnical pipe bag comprises the steps of vacuumizing, pressurizing, externally loading and the like in the geotechnical pipe bag, and the problems that the device structure is complex, the operation is complex, the internal drainage structure is easy to block and the like are solved in the modes, although the speed of slurry dehydration and consolidation can be improved to a certain extent.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the engineering slurry rapid dehydration system and the dehydration method which have the advantages of simple structure, simple and convenient operation and low maintenance, and can flexibly adjust the scheme according to the treatment capacity and the site condition, improve the slurry dehydration efficiency, save time and save labor.
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 line, high-order thick liquid section of thick bamboo, joins in marriage thick liquid pipeline and drainage system, high-order thick liquid section of thick bamboo includes open-top, high-order thick liquid section of thick bamboo passes through the support and supports in the high position, high-order thick liquid section of thick bamboo is higher than drainage system in the space, the output and the high-order thick liquid section of thick bamboo intercommunication of mud conveying line, the input intercommunication high-order thick liquid section of thick bamboo bottom of joining in marriage thick bamboo pipeline, the output intercommunication drainage system of joining in marriage thick liquid pipeline, join in marriage the thick liquid pipeline still to contain the gate valve.
Further, the high-level slurry cylinder comprises a liquid level sensor, the high-level slurry cylinder further comprises a high liquid level point H1 and a low liquid level point H2, and the slurry conveying pipeline comprises an automatic control valve electrically connected with the liquid level sensor. The automatic control valve is controlled to be opened and closed through the liquid level sensor, when the liquid level in the high-level slurry barrel is at a high liquid site H1, the automatic control valve is closed, waste slurry is stopped being injected into the high-level slurry barrel, when the liquid level reaches a low liquid site H2, the automatic control valve is opened, and the waste slurry is continuously injected into the high-level slurry barrel, so that labor can be saved.
Further, the water filtering system comprises a filter bag and a flow guide box, the high-position slurry cylinder is arranged at the top of the flow guide box, the flow guide box is a hollow box body with a cover plate capable of being opened and closed in a movable connection mode, one side, away from the cover plate, of the inner bottom of the flow guide box comprises a groove, and the filter bag is arranged in the flow guide box, and the top of the filter bag comprises a connecting port which penetrates through the flow guide box and is communicated with the output end of the slurry distribution pipeline. The guide box is used for placing the filter bag so as to carry out grouting operation of waste slurry, the high-position slurry barrel is erected at the top of the guide box, grouting can be carried out in the high-position slurry barrel through the slurry conveying pipeline, when the designed filling degree is achieved in the filter bag and the liquid level in the high-position slurry barrel reaches a high liquid position point H1, the pressure of the slurry on the inner wall of the filter bag reaches an extreme value because the size of hydrostatic pressure depends on the height of the liquid, the pressure difference between the inner wall and the outer wall of the filter bag is high, the filtration process of the slurry is promoted, in addition, the filter bag can be supplemented in real time in the process of continuously discharging the filtrate, the higher filling degree of the filter bag is maintained, the filtrate which is conveniently filtered by the groove is collected and discharged, the openable cover plate is convenient to take out the filter bag so as to facilitate subsequent transportation or further processing, meanwhile, the filter bag which is convenient to replace is convenient to operate, the dehydration efficiency of the slurry can be improved, and the filter box is simple and practical.
Further, the baffle box is internally provided with a limiting frame for limiting the position of the filter bag, the top of the limiting frame is open, the bottom of the limiting frame can slide along a sliding rail arranged at the bottom in the baffle box, the cover plate baffle box is hinged, and the cover plate can be folded and opened along the hinged position. The limit frame is used for limiting the maximum filling volume of the filter bag, avoiding the filter bag from displacement and rolling in the expansion process, further fitting the inner wall of the diversion box, blocking the groove and the like to possibly influence the filtering condition, the slide rail is convenient to take out or replace the filter bag, and the limit frame is simple in structure, convenient and practical to operate, time-saving and labor-saving.
Further, still include dehydration place and filling pipeline, the drainage system includes a plurality of filter bags, and a plurality of the filter bag is arranged in dehydration place surface, join in marriage thick liquid pipeline still including the joining in marriage thick liquid dry pipe and a plurality of joining in marriage thick liquid branch pipe of intercommunication each other, join in marriage thick liquid dry pipe's input intercommunication high-order mud section of thick bamboo bottom, every join in marriage the output of thick bamboo branch pipe and all communicate a filter bag, filling pipeline in proper order with each the filter bag intercommunication, the support supports the high-order mud section of thick bamboo in the position that is higher than the filter bag, the dehydration place is still including setting up in the nearby water conservancy diversion ditch of 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 filling pipeline is utilized to carry out slurry transportation on the filter bags, the slurry transportation pipeline is utilized to carry out slurry transportation on the high-position slurry cylinder, when the two reach the maximum value, the gate valve is opened, the tower frame is used for supporting the high-position slurry cylinder to enable the bottom of the high-position slurry cylinder to be higher than the filter bags, the self weight effect of the high-position slurry cylinder is utilized to enable waste slurry in the high-position slurry cylinder to be communicated with the waste slurry in the filter bags through the slurry distribution main pipe and the slurry distribution branch pipe, at the moment, the liquid level of the whole system reaches the maximum value, the slurry pressure in the filter bags is further strengthened, the effect of promoting the slurry filtering process is achieved, the dehydration efficiency can be greatly improved, the structure of the slurry distribution pipeline is combined with a plurality of filter bags, and a large amount of waste slurry can be dehydrated at one time, time and labor and time are saved.
Further, the bottom of the high-level mud cylinder is bucket-shaped. The bucket-shaped structure can avoid the generation of sludge at the bottom of large-particle flocs in the slurry.
The invention also provides a dehydration method of the engineering slurry rapid dehydration system, which comprises the following steps:
s1, lifting potential energy of waste slurry through a slurry pump, fully completing mixing flocculation with a flocculating agent, injecting the waste slurry into a high-level slurry cylinder through a slurry conveying pipeline, keeping a gate valve in a normally open state, enabling the waste slurry entering the high-level slurry cylinder to enter a filter bag positioned in a limiting frame through a slurry distribution pipeline, intercepting slurry particles and flocs into the filter bag along with filtration, enabling redundant moisture to permeate through pores of the filter bag, and collecting and discharging the permeated liquid at a groove at the bottom of a guide box;
s2, continuously filling the waste slurry until the filter bag reaches the maximum fullness, and continuously conveying the waste slurry into the high-level slurry cylinder to enable the liquid level to rise to a high liquid level point H1;
s3, the liquid level sensor sends a closing signal to the automatic control valve to stop grouting;
s4, along with the filtration, when the liquid level in the high-level slurry cylinder is reduced to a low-level site H2, the liquid level sensor sends an opening signal to the automatic control valve, and the waste slurry is continuously conveyed through the slurry conveying pipeline until reaching the high-level site H1, and the step S3 is repeated;
s5, when the water content of the sludge in the filter bag is reduced to a preset dewatering effect, closing the gate valve, closing and taking down the input port of the filter bag, opening the cover plate, integrally extracting the limit frame together with 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 residues, replacing a new filter bag, resetting the limit frame, connecting the filter bag with the output end of the slurry distribution pipeline, and repeating the steps S1-S4.
The invention also provides a dehydration method of the engineering slurry rapid dehydration system, which comprises the following steps:
s1, lifting potential energy of waste mud through a mud pump, fully completing mixing flocculation with a flocculating agent, directly filling the waste mud into a plurality of filter bags through a filling pipeline, and collecting and discharging mud filtrate through a diversion trench on a dehydration field;
s2, injecting part of waste slurry into a high-level slurry cylinder through a slurry conveying pipeline, wherein the high-level slurry cylinder is communicated with a filter bag through a slurry distribution pipeline, the gate valve is in a closed state at the moment, and when the liquid level reaches a high liquid site H1, a liquid level sensor sends a closing signal to an 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 interfaces of the gate valve and the slurry distribution branch pipe, and communicating the waste slurry in the high-level slurry cylinder with the waste slurry in the filter bag through the slurry distribution main pipe and the slurry distribution branch pipe under the action of dead weight;
s5, when the liquid level of the high-level slurry cylinder is lowered to a low liquid level point H2, the liquid level sensor sends an opening signal to the automatic control valve, waste slurry is continuously conveyed through the slurry conveying pipeline until reaching the high liquid level point H1, at the moment, the liquid level sensor sends a closing signal to the automatic control valve, waste slurry injection is stopped, the automatic control valve is circularly controlled along with liquid level change, and the filling degree in the filter bag is ensured;
and S6, when the water content of the slurry in the filter bag is reduced to a preset dehydration effect, closing the gate valve, cleaning filter residues in the filter bag, and carrying out subsequent treatment.
Compared with the prior art, the invention has the beneficial effects that:
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 condition, the mud dewatering efficiency is improved, and the time and the labor are saved. The principle that the pressure of liquid increases along with the increase of the liquid depth is utilized, the high-level slurry cylinder is combined with the water filtering system, so that the liquid level depth of the whole slurry dehydration system is obviously improved, the pressure of slurry in the bag body is greatly increased, meanwhile, in the whole dehydration process, the higher pressure in the filter bag is maintained, the dehydration efficiency is improved, and meanwhile, the whole device can be respectively replaced and maintained, and the maintenance cost is low; the high-level mud cylinder, the liquid level sensor and the automatic control valve are matched, so that the mud volume in the filter bag can be always maintained at a higher level, the large pressure difference between the inside and the outside of the bag body is maintained, the labor intensity of field workers is reduced, and time and labor are saved; the method can be flexibly adjusted according to different field operation conditions, and the method adopts different embodiments to carry out dehydration treatment according to local conditions in projects with limited space, smaller and more dispersed project slurry yield and under the conditions of large treatment capacity, more concentrated slurry and available nearby open fields, thereby having stronger popularization.
Drawings
FIG. 1 is a schematic diagram of an overall structure of an embodiment of the present invention.
Fig. 2 is a schematic diagram of the overall structure of a second embodiment of the present invention.
The device comprises a 1-slurry conveying pipeline, an 11-automatic control valve, a 2-high-position slurry cylinder, a 21-liquid level sensor, a 22-support, a 3-slurry distribution pipeline, a 31-gate valve, a 32-slurry distribution main pipe, a 33-slurry distribution branch pipe, a 4-filter bag, a 5-flow guide box, a 51-limiting frame, a 52-sliding rail, a 53-cover plate, a 54-groove, a 6-filling pipeline, a 7-dehydration site and a 71-flow guide groove.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described in the following in conjunction with the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
The invention will be further illustrated, but is not limited, by the following examples.
The engineering mud rapid dehydration system shown in the figure comprises a mud conveying pipeline 1, a high-level mud cylinder 2, a mud distribution pipeline 3 and a water filtering system, wherein the top of the high-level mud cylinder 2 is opened, the high-level mud cylinder 2 is supported at a high position through a support 22, the high-level mud cylinder 2 is higher than the water filtering system in space, the output end of the mud conveying pipeline 1 is communicated with the high-level mud cylinder 2, the input end of the mud distribution pipeline 3 is communicated with the bottom of the high-level mud cylinder 2, the output end of the mud distribution pipeline 3 is communicated with the water filtering system, and the mud distribution pipeline 3 further comprises a gate valve 31. The principle that the pressure of liquid increases along with the increase of the liquid depth is utilized, the high-level slurry cylinder is combined with the water filtering system, so that the liquid level depth of the whole slurry dehydration system is obviously improved, the pressure of slurry in the bag body is greatly increased, meanwhile, in the whole dehydration process, the higher pressure in the filter bag is maintained, the dehydration efficiency is improved, and meanwhile, the whole device can be respectively replaced and maintained, and the maintenance cost is low; the high-level mud cylinder, the liquid level sensor and the automatic control valve are matched, so that the mud volume in the filter bag can be always maintained at a higher level, the large pressure difference between the inside and the outside of the bag body is maintained, the labor intensity of field workers is reduced, and time and labor are saved; the method can be flexibly adjusted according to different field operation conditions, and the method adopts different embodiments to carry out dehydration treatment according to local conditions in projects with limited space, smaller and more dispersed project slurry yield and under the conditions of large treatment capacity, more concentrated slurry and available nearby open fields, thereby having stronger popularization. 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 condition, the mud dewatering 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 automatic control valve is controlled to be opened and closed through the liquid level sensor, when the liquid level in the high-level slurry barrel is at a high liquid site H1, the automatic control valve is closed, waste slurry is stopped being injected into the high-level slurry barrel, when the liquid level reaches a low liquid site H2, the automatic control valve is opened, and the waste slurry is continuously injected into the high-level slurry barrel, so that labor can be saved.
Preferably, the water filtering system comprises a filter bag 4 and a guide box 5, the high-level slurry cylinder 2 is arranged at the top of the guide box 5, the guide box 5 is a hollow box body with a cover plate 53 which can be opened and closed in a movable connection manner, one side, away from the cover plate 53, of the inner bottom of the guide box 5 comprises a groove 54, the filter bag 4 is arranged in the guide box 5, and the top of the filter bag is provided with a connecting port which penetrates through the guide box 5 and is communicated with the output end of the slurry distribution pipeline 3. In the first embodiment of the present invention, as shown in fig. 1, the guide box is used for placing the filter bag so as to perform grouting operation of waste slurry, the high-level slurry cylinder is erected at the top of the guide box, grouting can be performed into the high-level slurry cylinder through the 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 the high-level liquid site H1, the pressure of the slurry to the inner wall of the filter bag reaches the extremum because the magnitude of the hydrostatic pressure depends on the height of the liquid, the higher pressure difference between the inside and the outside promotes the filtration process of the slurry, in addition, because the high-level slurry cylinder stores a certain amount of waste slurry, the filter bag can be replenished in real time in the process of continuously discharging the filtrate, the higher filling degree of the filter bag is maintained, the filtrate filtered by the groove is conveniently collected and discharged, the openable cover plate conveniently takes out the filter bag so as to facilitate the subsequent transportation or further treatment, and simultaneously, the filter bag is convenient to replace, the operation is simple and practical.
Preferably, the baffle 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 sliding rail 52 arranged at the bottom in the baffle box 5, the cover plate 53 is hinged with the baffle box 5, and the cover plate 53 can be folded and unfolded along the hinged position. The limit frame is used for limiting the maximum filling volume of the filter bag, avoiding the filter bag from displacement and rolling in the expansion process, further fitting the inner wall of the diversion box, blocking the groove and the like to possibly influence the filtering condition, the slide rail is convenient to take out or replace the filter bag, and the limit frame is simple in structure, convenient and practical to operate, time-saving and labor-saving.
Preferably, the dewatering device further 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 slurry distribution main pipes 32 and a plurality of slurry distribution branch pipes 33 which are mutually communicated, the input ends of the slurry distribution main pipes 32 are communicated with the bottom of the high-level slurry cylinder 2, the output ends of the slurry distribution branch pipes 33 are communicated with one filter bag 4, the filling pipeline 6 is sequentially communicated with each filter bag 4, the support 22 supports the high-level slurry cylinder 2 at a position higher than the filter bags 4, and the dewatering field 7 further comprises a diversion trench 71 which is arranged near the filter bags 4. As shown in FIG. 2, when the treatment capacity is large or the site condition is sufficient, the structure of the dewatering system is adjusted according to the need, the structure of the second embodiment is adopted to carry out the dewatering operation, the filling pipeline is utilized to carry out the slurry conveying on the filter bags, the slurry conveying pipeline is utilized to carry out the slurry conveying on the high-position slurry cylinder, the gate valve is opened when the two reach the maximum value, the tower frame is used for erecting the high-position slurry cylinder to enable the bottom of the high-position slurry cylinder to be higher than the filter bags, the self gravity combined with the principle that the liquid pressure is increased along with the increase of the liquid depth is utilized, the dead weight of the high-position slurry cylinder is utilized to enable the waste slurry in the high-position slurry cylinder to be communicated with the waste slurry in the filter bags through the slurry distribution main pipe and the slurry distribution branch pipe, the liquid level of the whole system reaches the maximum value at the moment, the slurry pressure inside the filter bags is further strengthened, the effect of promoting the slurry filtering process is achieved, the dewatering efficiency can be greatly improved, the structure of the slurry distribution pipeline is combined with a plurality of filter bags, the dewatering treatment can be carried out on a large amount of waste slurry at one time, and time is saved, and labor and time, because the slurry filling and slurry distribution are mutually independent, the whole device is small, practical, light, and convenient, and easy to operate.
Preferably, the bottom of the high-level mud drum 2 is bucket-shaped. The bucket-shaped structure can avoid the generation of sludge at the bottom of large-particle flocs in the slurry.
Preferably, the high-level mud drum 2 is not limited to a cylindrical shape, and may be a container with an opening at the upper part 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 needs to ensure that the high-level mud cylinder has enough liquid level difference with the filter bag; the first embodiment can also be combined to a vehicle carrier to realize more flexible operation; in the second embodiment, a plurality of waste mud quick dewatering systems can be connected in series or in parallel to promote the dewatering operation of a larger amount of mud.
Preferably, the filter bag 4 is a geotechnical pipe bag or recyclable filter cloth, and has sufficient material strength and good permeability.
The invention also designs a dehydration method of the engineering slurry rapid dehydration system, which comprises the following steps of:
s1, lifting potential energy of waste slurry through a slurry pump, fully completing mixing flocculation with a flocculating agent, injecting the waste slurry into a high-level slurry cylinder 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 cylinder 2 to enter a filter bag 4 positioned in a limit frame 51 through a slurry distribution pipeline 3, intercepting slurry particle flocs into the filter bag 4 along with filtering, enabling 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 guide 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 cylinder 2, slowly accumulating the slurry in the high-level slurry cylinder 2 after the slurry passes through the slurry distribution pipeline 3, and raising the liquid level to a high liquid level point H1;
s3, a liquid level sensor 21 sends a closing signal to an automatic control valve 11 to stop grouting, at the moment, the liquid level in a high-level slurry cylinder 2 reaches a high liquid level point H1, the liquid level in the whole system reaches the maximum value at the moment because the size of hydrostatic pressure depends on the height of the liquid, the volume of a filter bag 4 reaches the maximum value, the pressure of slurry on the inner wall of the filter bag 4 also reaches the extreme value, the higher pressure difference between the inside and the outside of the pipe bag promotes the filtration process of the slurry, and in addition, the filter bag 4 can be replenished in real time in the process of continuously discharging the filtrate because the high-level slurry cylinder 2 stores a certain amount of slurry, and the higher fullness of the filter bag 4 is maintained;
s4, along with the filtration, when the liquid level in the high-level slurry cylinder 2 drops to a low liquid level point H2, the liquid level sensor 21 sends an opening signal to the automatic control valve 11, and the waste slurry is continuously conveyed through the slurry conveying pipeline 1 until reaching the 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 the percolate in the groove 54 or the liquid level descending speed of the high-level slurry cylinder 2, closing the gate valve 31, closing and taking down the input port of the filter bag 4 when the water content of the slurry in the filter bag 4 is reduced to a preset dehydration effect, opening the cover plate 53, integrally extracting the limit frame 51 and 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 limit 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 a dehydration method of another engineering slurry rapid dehydration system, which comprises the following steps:
s1, lifting potential energy of waste mud through a mud pump, fully completing mixing flocculation with a flocculating agent, directly injecting the waste mud into a plurality of filter bags 4 through a filling pipeline 6 for filling, and collecting and discharging mud filtrate through a diversion trench 71 on a dewatering site 7;
s2, injecting part of waste slurry into the high-level slurry cylinder 2 through the slurry conveying pipeline 1, wherein the high-level slurry cylinder 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 site H1, the liquid level sensor 21 sends a closing signal to the automatic control valve 11 to stop grouting;
s3, stopping conveying 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 interfaces of the gate valve 31 and the slurry distribution branch pipe 33, and communicating the waste slurry in the high-level slurry cylinder 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 dead weight;
s5, when the liquid level of the high-level mud cylinder 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 reaching the high liquid level point H1, at the moment, the liquid level sensor 21 sends a closing signal to the automatic control valve 11 to stop waste mud injection, the automatic control valve 11 is circularly controlled along with liquid level change, and the filling degree in the filter bag 4 is ensured;
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 descending speed of the high-level slurry cylinder 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 filter residues in the filter bag 4, and carrying out subsequent treatment.
The invention can be flexibly adjusted according to different field operation conditions, and can be used for carrying out quick preliminary dehydration and transportation on waste slurry in the mode of the first embodiment in projects with limited space, smaller and more dispersed engineering slurry yield in urban areas and the like; under the conditions of large treatment capacity, concentrated mud and available open sites nearby, the mud dehydration in the sites can be continuously promoted by adopting the mode of the second embodiment; aiming at different field conditions, the invention can be applied to local conditions and has stronger popularization.
The foregoing is merely illustrative of the preferred embodiments of the present invention and is not intended to limit the embodiments and scope of the present invention, and it should be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the teachings of the present invention, which are intended to be included within the scope of the present invention.
Claims (8)
1. An engineering mud rapid dehydration system, which is characterized in that: including mud conveying line (1), high-order mud section of thick bamboo (2), join in marriage thick bamboo pipeline (3) and drainage system, high-order mud section of thick bamboo (2) open-top, high-order mud section of thick bamboo (2) are supported in the high position through support (22), high-order mud section of thick bamboo (2) are higher than drainage system in space, the output and the high-order mud section of thick bamboo (2) of mud conveying line (1) communicate, the input intercommunication high-order mud section of thick bamboo (2) bottom of join in marriage thick bamboo pipeline (3), the output intercommunication drainage system of joining in marriage thick bamboo pipeline (3), join in marriage thick bamboo pipeline (3) still contain gate valve (31).
2. The engineering mud rapid dewatering system of claim 1, wherein: the high-level slurry cylinder (2) comprises a liquid level sensor (21), the high-level slurry cylinder (2) further comprises a high liquid level point H1 and a low liquid level point H2, and the slurry 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, wherein: the water filtering system comprises a filter bag (4) and a flow guide box (5), the high-position slurry cylinder (2) is arranged at the top of the flow guide box (5), the flow guide box (5) is a hollow box body with a cover plate (53) capable of being opened and closed in a movable mode, one side, away from the cover plate (53), of the inner bottom of the flow guide box (5) comprises a groove (54), and 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. A rapid engineering mud dewatering system according to claim 3, wherein: still including being used for limiting limit frame (51) of filter bag (4) position in baffle box (5), limit frame (51) open-top, bottom can slide along slide rail (52) that set up in baffle box (5) inner bottom, apron (53) are articulated with baffle box (5), apron (53) can turn over the book along articulated department and open.
5. The engineering mud rapid dewatering system of claim 2, wherein: still include dehydration place (7) and filling pipeline (6), drainage system includes a plurality of filter bags (4), a plurality of filter bags (4) are arranged in dehydration place (7) surface, join in marriage thick liquid main pipe (32) and a plurality of thick liquid branch pipe (33) of joining in marriage of thick liquid pipeline (3) still including intercommunication each other, join in marriage the input intercommunication high-order thick liquid section of thick bamboo (2) bottom of thick liquid main pipe (32), every join in marriage the output of thick liquid branch pipe (33) all communicates a filter bag (4), filling 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 guide way (71) near filter bag (4).
6. The rapid engineering slurry dewatering system according to any one of claims 1-5, wherein: the bottom of the high-level slurry cylinder (2) is bucket-shaped.
7. A dewatering method of an engineering mud rapid dewatering system according to claim 4, comprising the steps of:
s1, lifting potential energy by a slurry pump, fully completing mixing flocculation with a flocculating agent, injecting the flocculating agent into a high-level slurry cylinder (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 cylinder (2) to enter a filter bag (4) positioned in a limit frame (51) through a slurry distribution pipeline (3), intercepting slurry particles in the filter bag (4) along with filtration, enabling 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 guide 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 cylinder (2) to enable the liquid level to rise to a high liquid level point H1;
s3, a liquid level sensor (21) sends a closing signal to an automatic control valve (11) to stop grouting;
s4, when the liquid level in the high-level slurry cylinder (2) is lowered to a low-level position H2, the liquid level sensor (21) sends an opening signal to the automatic control valve (11), and waste slurry is continuously conveyed through the slurry conveying pipeline (1) until reaching the high-level position H1, and the step S3 is repeated;
s5, when the water content of sludge in the filter bag (4) is reduced to a preset dewatering effect, closing the gate valve (31), closing and taking down the input port of the filter bag (4), opening the cover plate (53), integrally extracting the limit frame (51) together with the filter bag (4) from the guide box (5) through the sliding 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 limit frame (51), connecting the filter bag (4) with the output end of the slurry distribution pipeline (3), and repeating the steps S1-S4.
8. A dewatering method of an engineering mud rapid dewatering system according to claim 5, comprising the steps of:
s1, lifting potential energy of waste mud through a mud pump, fully completing mixing flocculation with a flocculating agent, directly injecting the waste mud into a plurality of filter bags (4) through a filling pipeline (6) for filling, and collecting and discharging mud filtrate through a diversion trench (71) on a dewatering site (7);
s2, injecting part of waste slurry into a high-level slurry cylinder (2) through a slurry conveying pipeline (1), wherein the high-level slurry cylinder (2) is communicated with a filter bag (4) through a slurry distribution pipeline (3), a gate valve (31) is in a closed state at the moment, and a liquid level sensor (21) sends a closing signal to an automatic control valve (11) to stop grouting when the liquid level reaches a high liquid site H1;
s3, stopping conveying waste mud 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 interfaces of the gate valve (31) and the slurry distribution branch pipe (33), and communicating the waste slurry in the high-level slurry cylinder (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 dead 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 reaching the high liquid level point H1, at the moment, the liquid level sensor (21) sends a closing signal to the automatic control valve (11) to stop waste mud injection, the automatic control valve (11) is circularly controlled along with liquid level change, and the filling degree in the filter bag (4) is ensured;
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 filter residues in the filter bag (4), and carrying out subsequent treatment.
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