CN114017054A - Slurry treatment equipment capable of automatically adapting to slurry balance shield slurry flow - Google Patents
Slurry treatment equipment capable of automatically adapting to slurry balance shield slurry flow Download PDFInfo
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- CN114017054A CN114017054A CN202111204605.9A CN202111204605A CN114017054A CN 114017054 A CN114017054 A CN 114017054A CN 202111204605 A CN202111204605 A CN 202111204605A CN 114017054 A CN114017054 A CN 114017054A
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- slurry
- slurry pump
- mud
- storage tank
- flow
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- 239000002002 slurry Substances 0.000 title claims abstract description 158
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 230000006837 decompression Effects 0.000 claims abstract description 9
- 239000002893 slag Substances 0.000 claims description 18
- 208000005156 Dehydration Diseases 0.000 claims description 17
- 230000018044 dehydration Effects 0.000 claims description 17
- 238000006297 dehydration reaction Methods 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 13
- 238000012216 screening Methods 0.000 claims description 13
- 239000011362 coarse particle Substances 0.000 claims description 12
- 239000010419 fine particle Substances 0.000 claims description 12
- 238000004064 recycling Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 8
- 238000004062 sedimentation Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 description 3
- 230000005641 tunneling Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/12—Devices for removing or hauling away excavated material or spoil; Working or loading platforms
-
- 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
-
- 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
- C02F11/127—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering by centrifugation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
- F04B49/065—Control using electricity and making use of computers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/20—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by changing the driving speed
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Organic Chemistry (AREA)
- Mining & Mineral Resources (AREA)
- General Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Computer Hardware Design (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
In the mud water treatment equipment, the underground slurry pump sucks mud from the shield machine, an electromagnetic flowmeter is connected in series on a pipeline between the underground slurry pump and the ground pressure reduction box, and the collected flow signal of the underground slurry pump is converted into an electric signal and is transmitted to the industrial personal computer. The industrial personal computer automatically adjusts the frequency of the driving motor of the 1# slurry pump and the frequency of the driving motor of the 2# slurry pump according to the electric signal and a preset program, so that the rotating speeds of the driving motor of the 1# slurry pump and the driving motor of the 2# slurry pump are changed, and the purpose of adjusting the flow rate of the slurry pump is achieved. The slurry passing through the electromagnetic flowmeter is conveyed on to a slurry decompression tank at the surface. The invention realizes automatic and intelligent control on the capacity of the ground slurry treatment equipment, reduces the labor intensity and the working difficulty of equipment operators, realizes the timely matching of the slurry treatment capacity of the ground equipment and the underground slurry output quantity, and avoids the occurrence of the idle consumption of the ground equipment or the accidents of slurry overflow and slurry leakage.
Description
Technical Field
The invention relates to a muddy water treatment device capable of automatically adapting to the flow of muddy water balance shield slurry.
Background
In the excavation construction of a subway or other tunnels, slurry (sand, clay and slurry mixture) generated by a slurry balance shield machine is conveyed to the ground by a slurry pump arranged in the tunnel and then is separated. As shown in fig. 1. The underground slurry pump conveys the shield slurry to a ground slurry decompression box; the decompressed slurry enters a coarse screen, oversize materials fall into a slag yard to be stacked, undersize materials enter a No. 1 slurry storage tank and are fed to a first-stage swirler for classification by a No. 1 slurry pump, overflow fine particles enter a No. 2 slurry storage tank to be subjected to next classification dehydration treatment, underflow coarse particles enter a first-stage dehydration screen for screening dehydration, and oversize materials fall into the slag yard to be stacked; the undersize products enter a No. 1 pulp storage tank for recycling; slurry entering the slurry storage tank No. 2 is sent to a secondary cyclone by a slurry pump No. 2 for classification, and overflowing fine particles enter a sedimentation tank for next dehydration treatment; and (3) the underflow coarse particles enter a secondary dewatering screen for screening and dewatering, oversize products fall into a slag yard for stacking, and undersize products enter a No. 2 pulp storage tank for recycling. In the mud separation treatment process, because the construction environment of the shield machine is complex, the stratum hardness and the soil composition are frequently changed, and the tunneling speed of the shield machine is changed along with the change of the stratum hardness and the soil composition, the flow rate of the mud conveyed to the ground decompression tank by the underground slurry pump is continuously fluctuated, and the fluctuation variable quantity is very large sometimes. The productivity of ground mud separation treatment equipment is generally greater than that of mud generated by a shield machine, when the shield machine encounters a hard stratum and the mud yield is greatly reduced, the productivity of the ground equipment is seriously excessive, particularly, a 1# slurry pump and a 2# slurry pump are in a half-empty consumption state of unsaturated flow, so that electric energy is wasted, and the equipment is worn in vain. At the moment, the rotating speed of the slurry pump needs to be adjusted manually, but in the actual production process, the manual adjustment is often not timely, and the adjusted flow is not accurate enough. On the other hand, when the ground slurry pump is operated at a lower flow rate, if the tunneling speed of the shield tunneling machine is increased and the slurry yield is suddenly increased, but ground operators do not find and increase the flow rate of the No. 1 and No. 2 slurry pumps in time, and because a large amount of slurry is not pumped out of the slurry storage tank in time, the accidents of slurry overflow and slurry leakage of the coarse screen and the lower slurry storage tank occur, so that the operation environment is polluted, and the normal operation of slurry treatment operation is seriously influenced.
Disclosure of Invention
According to one aspect of the invention, the invention provides a muddy water treatment device capable of automatically adapting to the flow of muddy water balance shield slurry, which is characterized by comprising:
the electromagnetic flowmeter is connected in series on a pipeline between the underground slurry pump and the slurry decompression tank on the ground and is used for collecting a slurry flow signal of the underground slurry pump, the underground slurry pump is used for sucking slurry from a shield machine,
the mud pressure reduction tank is used for receiving mud passing through the electromagnetic flowmeter,
the mud after being decompressed by the mud decompression box enters a coarse screen, oversize materials of the coarse screen are sent to a slag yard,
a No. 1 pulp storage tank, the undersize of the coarse screen enters the No. 1 pulp storage tank,
the primary cyclone is used for carrying out granularity classification on the slurry,
the No. 1 slurry pump is used for feeding the materials entering the No. 1 slurry storage tank to the primary cyclone for classification,
the overflow fine particles of the first-stage swirler enter the No. 2 pulp storage tank to be subjected to the next step of graded dehydration treatment,
the underflow coarse particles of the first-stage cyclone enter the first-stage dewatering screen for screening and dewatering, the oversize products of the first-stage dewatering screen are sent to a slag yard, the undersize products of the first-stage dewatering screen enter a No. 1 pulp storage tank for recycling,
the secondary cyclone is used for carrying out granularity classification on the slurry,
the No. 2 slurry pump is used for feeding the slurry entering the No. 2 slurry storage tank to the secondary cyclone for classification, the overflow fine particles of the secondary cyclone enter the sedimentation tank for the next dehydration treatment,
the underflow coarse particles of the secondary cyclone enter the secondary dewatering screen for screening and dewatering, the oversize products of the secondary dewatering screen are sent to a slag field, the undersize products of the secondary dewatering screen enter a No. 2 pulp storage tank for recycling,
and the industrial personal computer is used for controlling the mud flow of the 1# slurry pump and controlling the mud flow of the 2# slurry pump according to the mud flow signal.
Drawings
Fig. 1 is a schematic configuration diagram of a conventional muddy water treatment apparatus.
Fig. 2 is a schematic configuration diagram of a muddy water treatment apparatus capable of automatically adapting to the flow rate of muddy water balance shield mud according to an embodiment of the present invention.
Detailed Description
Aiming at the problems in the prior art, the inventor provides a slurry water treatment device capable of automatically adapting to slurry water balance shield slurry flow, wherein an electromagnetic flowmeter is used for collecting a flow signal of a slurry pump in a well, the signal is transmitted to an industrial control computer (hereinafter referred to as an industrial control computer), and the industrial control computer is used for automatically adjusting and controlling the flow of a ground slurry pump.
As shown in fig. 2, in the muddy water treatment apparatus comprising an electromagnetic flowmeter and an industrial personal computer according to one embodiment of the present invention, a down-hole slurry pump sucks in the slurry from a shield machine, and an electromagnetic flowmeter is connected in series to a pipe between the down-hole slurry pump and a ground pressure reduction tank; the electromagnetic flow meter converts the collected flow signal of the underground slurry pump into an electric signal, and the electric signal is transmitted to the industrial personal computer. The industrial personal computer automatically adjusts the frequency of the driving motor of the 1# slurry pump and the frequency of the driving motor of the 2# slurry pump according to a preset program, so that the rotating speeds of the driving motor of the 1# slurry pump and the driving motor of the 2# slurry pump are changed, and the purposes of adjusting the flow rate of the slurry pump and actually adjusting the productivity of the ground slurry treatment equipment are achieved.
The working process of the mud water treatment equipment is that, as mentioned above, mud passing through the electromagnetic flowmeter is continuously conveyed to a mud pressure reduction box on the ground, the mud after pressure reduction enters a coarse screen for screening and dehydration, oversize products fall into a slag yard for stacking, undersize products enter a No. 1 pulp storage tank and are sent to a first-stage swirler for granularity classification by a No. 1 pulp pump, overflow fine particles enter a No. 2 pulp storage tank for next classification and dehydration, the other part of underflow coarse particles enter a first-stage dehydration screen for screening and dehydration, and oversize products fall into the slag yard for stacking; the undersize products enter a No. 1 pulp storage tank for recycling; slurry entering the slurry storage tank No. 2 is sent to a secondary cyclone by a slurry pump No. 2 for particle size classification, and overflowing fine particles enter a sedimentation tank for next dehydration treatment; and the other part of underflow coarse particles enter a secondary dewatering screen for screening and dewatering, oversize products fall into a slag yard for stacking, and undersize products enter a No. 2 pulp storage tank for recycling.
According to another aspect of the invention, a muddy water treatment method capable of automatically adapting to the flow of the muddy water balance shield slurry is provided, and comprises the following steps:
collecting a mud flow signal of an underground slurry pump by using an electromagnetic flowmeter connected in series with a pipeline between the underground slurry pump and a mud pressure reduction box on the ground, wherein the underground slurry pump is used for sucking slurry from a shield machine,
receiving the slurry through the electromagnetic flow meter with the slurry depressurization tank,
the mud decompressed by the mud decompression box enters a coarse screen,
the oversize material of the coarse screen is sent to a slag yard,
the undersize material of the coarse screen enters a No. 1 pulp storage tank,
the material entering the No. 1 pulp storage tank is sent to a first-stage swirler by a No. 1 slurry pump for classification,
the overflow fine particles of the first-stage cyclone enter a No. 2 pulp storage tank to carry out the next stage dehydration treatment,
the underflow coarse particles of the first-stage cyclone enter a first-stage dewatering screen for screening and dewatering, the oversize products of the first-stage dewatering screen are sent to a slag yard, the undersize products of the first-stage dewatering screen enter a No. 1 pulp storage tank for recycling,
the slurry entering the slurry storage tank No. 2 is sent to a secondary cyclone by a slurry pump No. 2 for classification, the overflow fine particles of the secondary cyclone enter a sedimentation tank for the next dehydration treatment,
the underflow coarse particles of the secondary cyclone are fed into a secondary dewatering screen for screening and dewatering, the oversize products of the secondary dewatering screen are fed into a slag yard, the undersize products of the secondary dewatering screen are fed into a No. 2 pulp storage tank for recycling,
and controlling the slurry flow of the 1# slurry pump and the slurry flow of the 2# slurry pump by using a control machine according to the slurry flow signal of the underground slurry pump.
According to a further aspect, the above-mentioned muddy water treatment method further comprises:
the mud flow signal of the underground slurry pump collected by the electromagnetic flowmeter is converted into an electric signal, and the electric signal is transmitted to the industrial personal computer.
According to a further aspect, the above-mentioned muddy water treatment method further comprises:
the industrial personal computer is used for adjusting the frequency of the driving motor of the 1# slurry pump and the frequency of the driving motor of the 2# slurry pump, so that the rotating speeds of the driving motor of the 1# slurry pump and the driving motor of the 2# slurry pump are changed, and the purpose of adjusting the flow of the 1# slurry pump and the 2# slurry pump is achieved.
The scheme of adding the electromagnetic flow meter on the conveying pipeline of the underground slurry pump and adding the industrial personal computer in the electric control system to control the flow of the ground slurry pump has the advantages and/or beneficial effects that:
firstly, the productivity of the ground slurry treatment equipment is automatically and intelligently controlled, and the labor intensity and the working difficulty of equipment operators are reduced;
and secondly, the timely matching of the slurry treatment capacity of the ground equipment and the underground slurry output quantity can be realized. The timely matching can bring good effects in two aspects, on one hand, when the output quantity of the underground slurry is reduced, the idle consumption of equipment caused by 'eating is not full' of ground equipment can be prevented, the unnecessary abrasion of the equipment is reduced, and the energy is saved; on the other hand, when the output quantity of the underground slurry is suddenly increased, the accidents of slurry overflowing and slurry running caused by the fact that ground equipment cannot be swallowed can be prevented, the pollution to the operation environment is avoided, and the normal operation of slurry water treatment operation is ensured.
Claims (6)
1. The utility model provides a can adapt to muddy water treatment facilities of balanced shield mud flow of muddy water automatically which characterized in that includes:
the electromagnetic flowmeter is connected in series on a pipeline between the underground slurry pump and the slurry decompression tank on the ground and is used for collecting a slurry flow signal of the underground slurry pump, the underground slurry pump is used for sucking slurry from a shield machine,
the mud pressure reduction tank is used for receiving mud passing through the electromagnetic flowmeter,
the mud after being decompressed by the mud decompression box enters a coarse screen, oversize materials of the coarse screen are sent to a slag yard,
a No. 1 pulp storage tank, the undersize of the coarse screen enters the No. 1 pulp storage tank,
a first-stage swirler,
the No. 1 slurry pump is used for feeding the materials entering the No. 1 slurry storage tank to the primary cyclone for classification,
the overflow fine particles of the first-stage swirler enter the No. 2 pulp storage tank to be subjected to the next step of graded dehydration treatment,
the underflow coarse particles of the first-stage cyclone enter the first-stage dewatering screen for screening and dewatering, the oversize products of the first-stage dewatering screen are sent to a slag yard, the undersize products of the first-stage dewatering screen enter a No. 1 pulp storage tank for recycling,
a secondary cyclone,
the No. 2 slurry pump is used for feeding the slurry entering the No. 2 slurry storage tank to the secondary cyclone for classification, the overflow fine particles of the secondary cyclone enter the sedimentation tank for the next dehydration treatment,
the underflow coarse particles of the secondary cyclone enter the secondary dewatering screen for screening and dewatering, the oversize products of the secondary dewatering screen are sent to a slag field, the undersize products of the secondary dewatering screen enter a No. 2 pulp storage tank for recycling,
and the industrial personal computer is used for controlling the mud flow of the 1# slurry pump and controlling the mud flow of the 2# slurry pump according to the mud flow signal.
2. The muddy water treatment apparatus as set forth in claim 1, wherein:
the electromagnetic flow meter converts the collected mud flow signal into an electrical signal, which is transmitted to the industrial personal computer.
3. The muddy water treatment apparatus as set forth in claim 1, wherein:
the industrial computer adjusts the frequency of the driving motor of the 1# slurry pump and the driving motor of the 2# slurry pump, so that the rotating speeds of the driving motor of the 1# slurry pump and the driving motor of the 2# slurry pump are changed, and the purpose of adjusting the flow of the 1# slurry pump and the 2# slurry pump is achieved.
4. A muddy water treatment method capable of automatically adapting to the flow of muddy water balance shield slurry is characterized by comprising the following steps:
collecting a mud flow signal of an underground slurry pump by using an electromagnetic flowmeter connected in series with a pipeline between the underground slurry pump and a mud pressure reduction box on the ground, wherein the underground slurry pump is used for sucking slurry from a shield machine,
receiving the slurry through the electromagnetic flow meter with the slurry depressurization tank,
the mud decompressed by the mud decompression box enters a coarse screen,
the oversize material of the coarse screen is sent to a slag yard,
the undersize material of the coarse screen enters a No. 1 pulp storage tank,
the material entering the No. 1 pulp storage tank is sent to a first-stage swirler by a No. 1 slurry pump for classification,
the overflow fine particles of the first-stage cyclone enter a No. 2 pulp storage tank to carry out the next stage dehydration treatment,
the underflow coarse particles of the first-stage cyclone enter a first-stage dewatering screen for screening and dewatering, the oversize products of the first-stage dewatering screen are sent to a slag yard, the undersize products of the first-stage dewatering screen enter a No. 1 pulp storage tank for recycling,
the slurry entering the slurry storage tank No. 2 is sent to a secondary cyclone by a slurry pump No. 2 for classification, the overflow fine particles of the secondary cyclone enter a sedimentation tank for the next dehydration treatment,
the underflow coarse particles of the secondary cyclone are fed into a secondary dewatering screen for screening and dewatering, the oversize products of the secondary dewatering screen are fed into a slag yard, the undersize products of the secondary dewatering screen are fed into a No. 2 pulp storage tank for recycling,
and controlling the slurry flow of the 1# slurry pump and the slurry flow of the 2# slurry pump by using a control machine according to the slurry flow signal.
5. The muddy water treatment method as claimed in claim 4, characterized in that:
the mud flow signal collected by the electromagnetic flowmeter is converted into an electric signal, and the electric signal is transmitted to the industrial personal computer.
6. The muddy water treatment method as claimed in claim 4, characterized in that:
the industrial personal computer is used for adjusting the frequency of the driving motor of the 1# slurry pump and the frequency of the driving motor of the 2# slurry pump, so that the rotating speeds of the driving motor of the 1# slurry pump and the driving motor of the 2# slurry pump are changed, and the purpose of adjusting the flow of the 1# slurry pump and the 2# slurry pump is achieved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111204605.9A CN114017054A (en) | 2021-10-15 | 2021-10-15 | Slurry treatment equipment capable of automatically adapting to slurry balance shield slurry flow |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111204605.9A CN114017054A (en) | 2021-10-15 | 2021-10-15 | Slurry treatment equipment capable of automatically adapting to slurry balance shield slurry flow |
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| CN114017054A true CN114017054A (en) | 2022-02-08 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101201989A (en) * | 2007-12-18 | 2008-06-18 | 徐州工业职业技术学院 | Multifunctional automatization biological sewage treatment composite experimental device |
| CN203264447U (en) * | 2013-05-30 | 2013-11-06 | 中国矿业大学(北京) | Coal slime filter device |
| CN110002711A (en) * | 2019-04-03 | 2019-07-12 | 康明克斯(北京)环保技术有限公司 | A kind of mud separation equipment improving the fine particle rate of recovery |
| CN112250274A (en) * | 2020-09-22 | 2021-01-22 | 中铁隧道集团二处有限公司 | Slurry treatment system and method for performing solid-liquid separation on shield waste slurry |
| CN216406834U (en) * | 2021-10-15 | 2022-04-29 | 康明克斯（北京）机电设备有限公司 | Slurry treatment equipment capable of automatically adapting to slurry balance shield slurry flow |
-
2021
- 2021-10-15 CN CN202111204605.9A patent/CN114017054A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101201989A (en) * | 2007-12-18 | 2008-06-18 | 徐州工业职业技术学院 | Multifunctional automatization biological sewage treatment composite experimental device |
| CN203264447U (en) * | 2013-05-30 | 2013-11-06 | 中国矿业大学(北京) | Coal slime filter device |
| CN110002711A (en) * | 2019-04-03 | 2019-07-12 | 康明克斯(北京)环保技术有限公司 | A kind of mud separation equipment improving the fine particle rate of recovery |
| CN112250274A (en) * | 2020-09-22 | 2021-01-22 | 中铁隧道集团二处有限公司 | Slurry treatment system and method for performing solid-liquid separation on shield waste slurry |
| CN216406834U (en) * | 2021-10-15 | 2022-04-29 | 康明克斯（北京）机电设备有限公司 | Slurry treatment equipment capable of automatically adapting to slurry balance shield slurry flow |
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