CN111821758A - A kind of earth pressure shield mud water treatment device and its treatment process - Google Patents

Abstract

The invention belongs to the field of muddy water treatment of tunnel underground tunneling matching equipment, and particularly discloses a muddy water treatment device for an earth pressure shield and a treatment process thereof, wherein the muddy water treatment device comprises a vibrating grid machine, a dewatering screen, a slurry pool and a filter pressing device, the vibrating grid machine is used for screening large particles of a material to be treated conveyed to the vibrating grid machine by a conveyor, the vibrating grid machine is connected with a sand outlet chute and two material guide chutes, the sand outlet chute and the material guide chutes are respectively communicated with a primary stock dump and a dewatering screen, and the vibrating grid machine screens the material of the material to be treated into primary screening mud and leads the primary screening mud to the dewatering screen by the material guide chutes; the dewatering screen is used for carrying out sand removing and screening on the primary screened slurry and is provided with a slurry discharge port and a fine sand discharge port. The invention reduces the processed planar land, fully compresses the occupied area and increases the stability and safety of the project by the three-dimensional design, and simultaneously adopts a novel muddy water processing technology, and the processing technology is simple and efficient.

Description

A kind of earth pressure shield mud water treatment device and its treatment process

technical field

The invention relates to the field of mud water treatment of supporting equipment for underground tunnel excavation, in particular to an earth pressure shield mud water treatment device and a treatment process thereof.

Background technique

The urbanization process is advancing in a geometric form, and more and more cities are constantly excavating underground space, followed by the construction of various subway tunnel projects. The available space in the city has been greatly tested. Shield construction is a commonly used construction method for urban underground rail transit—subway, and has been widely used in subway construction in major cities at home and abroad. Earth pressure balance shield boring machine is the main equipment for subway shield construction. Its working principle is to use the electric motor (or hydraulic motor) in the shield boring machine to drive the cutter head to rotate to cut the soil on the underground excavation surface.

Although the earth pressure shield construction is beneficial to control the stratum displacement, due to the influence of engineering geology, hydrological conditions and the surrounding environment, there are still a lot of construction risks, and the earth pressure shield slag and treatment methods are very simple. The treatment will directly cause pollution to the surrounding environment, so an earth pressure shield mud water treatment device and its treatment process are required.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an earth pressure shield mud water treatment device and a treatment process thereof, so as to solve the problems raised in the above background technology.

In order to achieve the above purpose, the present invention provides the following technical solutions: an earth pressure shield mud water treatment device and a treatment process thereof, including a vibrating grid machine, a dewatering screen, a slurry tank and a filter press equipment, and the vibrating grid machine is used for The material to be processed that is conveyed to it by the conveyor is screened for large particles. The vibrating grid machine is connected with a sand outlet chute and two material guide chutes, and the sand outlet chute and the material guide chute are respectively connected with a primary stack Field, dewatering screen, and vibrating grid machine screen the materials to be treated into primary screening mud and guide it to the dewatering screen through the material guide chute; the dewatering screen is used for sand removal and screening of the primary screening mud, and the dewatering screen has The mud discharge port and the powder fine sand discharge port, the mud discharge port and the powder fine sand discharge port are respectively connected with a slurry pool and a secondary storage yard; the slurry pool is provided with a submersible mixer for stirring the mud. The lower part of the slurry tank is connected with the main circulation pipeline and the two sand and mud discharge pipelines. The main circulation pipeline is provided with a manual knife gate valve, a first pneumatic knife gate valve and a circulating pump. The output end of the main circulation pipeline is connected to the internal circulation of the slurry tank. The pipeline and the feeding end of the vibrating grid machine; the two sand slurry discharge pipelines are connected to the discharge output end of the lower part of the slurry pool, and the two sand slurry discharge pipelines are distributed with a slurry pump and a manual knife gate valve, The second pneumatic knife gate valve, the output ends of the two sand and mud discharge pipelines are connected to the filter press equipment.

Preferably, the vibrating grid machine is used for sieving sand and gravel particles with a particle size larger than 5 mm, and the dewatering screen is used for screening fine sand particles with a particle size larger than 0.074 mm and less than 5 mm.

Preferably, the internal circulation pipeline of the pulp tank is connected between the output end of the main circulation pipeline and the pulp tank, and a manual knife gate valve is distributed on the internal circulation pipeline of the pulp tank.

Preferably, the filter press equipment includes two box-type filter presses, the two box-type filter presses are respectively connected with the output ends of the two sand and mud discharge pipelines, and the box-type filter press has a filtrate discharge end and a mud cake discharge end. , the filtrate discharge end is connected with a recovery tank.

Preferably, the recovery tank has a sewage treatment tank and a clean water tank, and the sewage treatment tank is used to perform sewage treatment on the filtrate output by the box filter press, and output it to the clean water tank after treatment.

Preferably, the bottom of the sewage treatment tank is connected to the feed end of the vibrating grid machine through a recovery pipeline, and the recovery pipeline is used to recycle and treat the sediment at the bottom of the sewage treatment tank.

The present invention also provides a treatment process of the above-mentioned earth pressure shield muddy water treatment device, comprising the following steps:

S1: The material to be processed is transported by the conveyor to the vibrating grid machine for large particle screening. During the material feeding period, it can be selectively washed to make the material liquefied into a slurry shape. The vibrating grid machine makes the particle size of the material larger than 5mm. The stone particles are screened out and dropped to the first-level storage yard;

S2: The mud screened by S1 becomes the primary screen mud, which is transported to the dewatering screen through the material guide chute for sand removal and screening, and the screened mud falls into the mud pool below the equipment, with a particle size greater than 0.074mm , the powder and fine sand particles smaller than 5mm are screened out and dropped to the secondary storage yard;

S3: Through the action of the submersible mixer, the treated slurry is continuously stirred in the slurry tank, which plays a role in preventing the sedimentation of the slurry, and at the same time, the internal circulation of the slurry tank is carried out through the internal circulation pipeline and circulating pump of the slurry tank;

S4: When it is necessary to dispose of the slurry, turn on the slurry pump, and pump the slurry into the box-type filter press. The box-type filter press converts the liquefied slurry into solidified mud cake for transportation. The filtrate output by the box-type filter press The water is returned to the recovery tank and used repeatedly.

Compared with the prior art, the beneficial effects of the present invention are:

Through the three-dimensional design, the invention reduces the plane land for treatment, fully compresses the floor space, and increases the stability and safety of the project. At the same time, a new type of mud water treatment process is adopted, that is, the material is screened by large particles and a sand removal screen. The processing technology is simple and efficient. The slag screened by this process is non-polluting and harmless to the environment. It can be used as backfill soil, garden soil, and non-burning bricks. Played the effect of resource recycling.

Description of drawings

Fig. 1 is the three-dimensional design drawing of the present invention;

FIG. 2 is an enlarged structural schematic diagram of A in FIG. 1 of the present invention.

In the picture: 1. Vibrating grid machine; 101. Sand outlet chute; 102. Material guide chute; 2. Primary storage yard; 3. Dewatering screen; 31. Mud outlet; 4. Secondary storage yard; 5. Slurry pool; 51. Main circulation pipeline; 511. The first pneumatic knife gate valve; 512. Circulating pump; 522. Second pneumatic knife gate valve; 6. Submersible mixer; 7. Internal circulation pipeline of pulp tank; 8. Box filter press; 9. Recovery tank; 91. Sewage treatment tank; 92. Clear water tank; 10. Recovery pipeline.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "vertical", "upper", "lower", "horizontal", etc. are based on the orientations or positional relationships shown in the drawings, only In order to facilitate the description of the present invention and simplify the description, it is not indicated or implied that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise expressly specified and limited, the terms "arranged", "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, It can also be a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or the internal communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

1-2, the present invention provides a technical solution: an earth pressure shield mud water treatment device and its treatment process, including a vibrating grid machine 1, a dewatering screen 3, a slurry tank 5 and a filter press equipment, the said The vibrating grid machine 1 is used to screen the large particles of the materials to be processed by the conveyor. 101. The material guide chute 102 is respectively connected with the first-level storage yard 2 and the dewatering screen 3, and the vibrating grid machine 1 screens the material of the material to be processed into the primary screening mud and is guided by the material guide chute 102 to the dewatering screen 3; the said The dewatering screen 3 is used to de-sand and screen the primary screening mud. The dewatering screen 3 has a mud discharge port 31 and a powder fine sand discharge port 32. The mud discharge port 31 and the powder fine sand discharge port 32 are respectively connected with slurry Pool 5 and secondary yard 4; the slurry pool 5 is provided with a submersible mixer 6 for stirring the mud, and the lower part of the slurry pool 5 is connected with a main circulation pipeline 51 and a two-out sand slurry discharge pipeline 52. The main circulation pipeline 51 is provided with a manual knife gate valve, a first pneumatic knife gate valve 511 and a circulating pump 512, and the output end of the main circulation pipeline 51 is connected to the internal circulation pipeline 7 of the slurry pool and the feed end of the vibrating grill machine 1; The two sand-discharging mud discharge pipelines 52 are connected to the discharge output end at the lower part of the slurry pool 5, and the two sand-discharging mud discharge pipelines 52 are distributed with a slurry pump 521, a manual knife gate valve, and a second pneumatic knife gate valve 522. The output ends of the two sand and mud discharge pipes 52 are connected to the filter press equipment.

In this embodiment, the vibrating grid machine 1 is used for screening sand particles with a particle size larger than 5 mm, and the dewatering screen 3 is used for screening fine powder sand particles with a particle size larger than 0.074 mm and smaller than 5 mm.

In this embodiment, the internal circulation pipeline 7 of the pulp pool is connected between the output end of the main circulation pipeline 51 and the pulp pool 5, and a manual knife gate valve is distributed on the internal circulation pipeline 7 of the pulp pool.

In this embodiment, the filter press equipment includes two box-type filter presses 8, which are respectively connected with the output ends of the two sand and mud discharge pipelines 52, and the box-type filter press 8 has a filtrate discharge The end 81 is connected with the mud cake discharge end 82, and the filtrate discharge end 81 is connected with the recovery tank 9.

In this embodiment, the recovery tank 9 has a sewage treatment tank 91 and a clean water tank 92. The sewage treatment tank 91 is used for sewage treatment of the filtrate output by the box filter press 8, and after the treatment, it is output to the clean water tank 92. .

In this embodiment, the bottom of the sewage treatment tank 91 is connected to the feed end of the vibrating grid machine 1 through the recovery pipeline 10 , and the recovery pipeline 10 is used to recycle the sediment at the bottom of the sewage treatment tank 91 .

In this embodiment, a treatment process of an earth pressure shield mud water treatment device includes the following steps:

S1: The material to be processed is transported by the conveyor to the vibrating grid machine 1 for large particle screening. During the feeding of the material, it can be selectively washed to make the material liquefied into a slurry shape, and the vibrating grid machine 1 can make the material particle size Stone particles larger than 5mm are screened out and dropped to the first-level storage yard 2;

S2: The mud screened by S1 becomes the primary screen mud, which is transported to the dewatering screen 3 through the material guide chute 102 for sand removal and screening, and the screened mud falls into the mud pool 5 below the equipment. The powder and fine sand particles larger than 0.074mm and smaller than 5mm are screened out and dropped to the secondary storage yard 4;

S3: Through the action of the submersible mixer 6, the treated mud is continuously stirred in the slurry tank 5, which plays a role in preventing the sedimentation of the mud. cycle;

S4: When it is necessary to carry out the slurry disposal, the slurry pump 521 is turned on, and the slurry is pumped into the box-type filter press. The box-type filter press 8 converts the liquefied slurry into solidified mud cake for transportation. The output filtrate water is returned to the recovery tank 9 and used repeatedly.

Through the three-dimensional design, the invention reduces the plane land for treatment, fully compresses the floor space, and increases the stability and safety of the project. At the same time, a new type of mud water treatment process is adopted, that is, the material is screened by large particles and a sand removal screen. The processing technology is simple and efficient. The slag screened by this process is non-polluting and harmless to the environment. It can be used as backfill soil, garden soil, and non-burning bricks. Played the effect of resource recycling.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, and substitutions can be made in these embodiments without departing from the principle and spirit of the invention and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (7)

1. The soil pressure shield muddy water treatment device is characterized by comprising a vibration grating machine (1), a dewatering screen (3), a slurry pool (5) and a filter pressing device, wherein the vibration grating machine (1) is used for screening large particles of a material to be treated conveyed to the vibration grating machine through a conveyor, the vibration grating machine (1) is connected with a sand outlet chute (101) and two material guide chutes (102), the sand outlet chute (101) and the material guide chutes (102) are respectively communicated with a primary stock yard (2) and the dewatering screen (3), and the vibration grating machine (1) screens the material to be treated into primary screening mud and leads the primary screening mud to the dewatering screen (3) through the material guide chutes (102); the dewatering screen (3) is used for desanding and screening the primary screened slurry, the dewatering screen (3) is provided with a slurry discharge port (31) and a fine sand discharge port (32), and the slurry discharge port (31) and the fine sand discharge port (32) are respectively connected with a slurry pond (5) and a secondary yard (4); a submersible mixer (6) for mixing the slurry is arranged in the slurry tank (5), the lower part of the slurry tank (5) is connected with a main circulation pipeline (51) and two mortar discharge pipelines (52), a manual knife gate valve, a first pneumatic knife gate valve (511) and a circulating pump (512) are arranged on the main circulation pipeline (51), and the output end of the main circulation pipeline (51) is communicated with the internal circulation pipeline (7) of the slurry tank and the feed end of the vibrating grid machine (1); the two sand slurry discharging pipelines (52) are connected to the discharging output end at the lower part of the slurry pool (5), a slurry pump (521), a manual knife gate valve and a second pneumatic knife gate valve (522) are distributed on the two sand slurry discharging pipelines (52), and the output ends of the two sand slurry discharging pipelines (52) are connected with a filter pressing device.

2. The earth pressure shield muddy water treatment device as claimed in claim 1, wherein the vibrating screen machine (1) is used for screening sand particles with the particle size larger than 5mm, and the dewatering screen (3) is used for screening fine sand particles with the particle size larger than 0.074mm and smaller than 5 mm.

3. The earth pressure shield muddy water treatment device according to claim 1, wherein the internal circulation pipeline (7) of the slurry tank is connected between the output end of the main circulation pipeline (51) and the slurry tank (5), and manual knife gate valves are distributed on the internal circulation pipeline (7) of the slurry tank.

4. The earth pressure shield muddy water treatment device as claimed in claim 1, wherein the filter pressing equipment comprises two box-type filter presses (8), the two box-type filter presses (8) are respectively communicated with the output ends of the two sand slurry discharging pipelines (52), the box-type filter presses (8) are provided with a filtrate discharging end (81) and a mud cake discharging end (82), and the filtrate discharging end (81) is connected with the recovery tank (9).

5. The earth pressure shield muddy water treatment device as claimed in claim 4, wherein said recovery tank (9) has a sewage treatment tank (91) and a clean water tank (92), and the sewage treatment tank (91) is used for performing sewage treatment on the filtrate output from the box filter press (8) and outputting the treated filtrate to the clean water tank (92).

6. The earth pressure shield muddy water treatment device as claimed in claim 5, wherein the bottom of the sewage treatment tank (91) is connected with the feeding end of the vibration grating machine (1) through a recovery pipeline (10), and the recovery pipeline (10) is used for recovering and treating sediments at the bottom of the sewage treatment tank (91).

7. The treatment process of the earth pressure shield muddy water treatment device according to any one of claims 1 to 6, characterized by comprising the steps of:

s1: the material to be treated is conveyed to a vibration grating machine (1) through a conveyor for large particle screening, the material can be selectively washed during the material loading period, so that the material is liquefied into slurry, and stone particles with the particle size of more than 5mm are screened out by the vibration grating machine (1) and fall to a primary storage yard (2);

s2: the slurry after being screened by the S1 becomes primary screening slurry, the primary screening slurry is conveyed to a dewatering screen (3) through a material guide chute (102) for sand removal screening, the screening slurry falls into a slurry pool (5) below the equipment, fine sand particles with the particle size larger than 0.074mm and smaller than 5mm are screened out and fall into a secondary storage yard (4);

s3: the treated slurry is continuously stirred in the slurry tank (5) under the action of the submersible stirrer (6), so that the effect of preventing the slurry from settling is achieved, and meanwhile, the circulation in the slurry tank (5) is carried out through a circulation pipeline (7) and a circulation pump (512) in the slurry tank;

s4: when the slurry discarding treatment is needed, a slurry pump (521) is started, slurry is pumped into a box-type filter press, liquefied slurry is converted into solidified mud cakes by the box-type filter press (8) for transportation, and filtrate water output by the box-type filter press (8) flows back to a recovery pool (9) and is repeatedly used.

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