CN113105010A - Method for cleaning sludge in mine sedimentation tank - Google Patents
Method for cleaning sludge in mine sedimentation tank Download PDFInfo
- Publication number
- CN113105010A CN113105010A CN202110438990.7A CN202110438990A CN113105010A CN 113105010 A CN113105010 A CN 113105010A CN 202110438990 A CN202110438990 A CN 202110438990A CN 113105010 A CN113105010 A CN 113105010A
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- China
- Prior art keywords
- sedimentation tank
- sludge
- slurry
- mine
- hydrocyclone
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
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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
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
Abstract
The invention discloses a method for cleaning sludge in a mine sedimentation tank, which relates to the technical field of underground mining.A slurry pump in the sedimentation tank pumps out the sludge after slurry making and feeds the sludge into a feed inlet of a hydrocyclone through a slurry pipe; the mud is acted by a hydrocyclone to obtain settled sand and overflow, the settled sand is fed into a filter press by the hydrocyclone for dehydration, the overflow is returned to a sedimentation tank by a return pipe for sedimentation or slurry making, the sedimentation tank is connected with a first water sump, and the first water sump is connected with a first clean water pump; and dewatering the settled sand by a filter press to obtain a filter cake and filtrate, directly loading and transporting the filter cake, and discharging the filtrate from the clean water pump II after the filtrate flows into the sump II. The slurry pump is adopted to pump the sludge, and the hydrocyclone is used for concentration and the filter press is used for dehydration, so that the whole process mechanized operation can be realized, the conveying cost and the pipeline abrasion can be reduced, and the comprehensive utilization of the sludge and the water resource can be realized.
Description
Technical Field
The invention relates to the technical field of underground mining, in particular to a method for cleaning sludge in a mine sedimentation tank.
Background
In order to guarantee continuous safe production of mines adopting an underground mining mode, a series of roadways reaching an ore body need to be dug from the ground surface to the underground to form a system of lifting, transportation, ventilation, power supply, air supply, water supply, drainage, communication and the like, a central pump house (comprising a sedimentation tank, a water sump and a clean water pump) is a main facility for mine drainage, and the function of the central pump house in the flood prevention and flood fighting work of mines is very important.
The water burst of an underground mining mountain usually enters a transportation level from a stope through a raise, a drop shaft, a crack and the like, and is gathered into a sedimentation tank through a drainage ditch of the transportation level, silt in the sedimentation tank is precipitated, clear water enters a water sump, and the silt in the sedimentation tank needs to be cleaned regularly due to the sedimentation of the silt (the silt in the coal mine and the metal non-metal mine in China is required by safety regulations, and the silt in the mine water sump, the sedimentation tank and a ditch needs to be cleaned in time). At present, two methods, namely manual cleaning and slurry pump cleaning, are mainly adopted for cleaning sludge in a sedimentation tank of a mine. Manual cleaning adopts tools such as spades, ladles, trolleys and the like to take out silt from the sedimentation tank, and the silt is transported and lifted to the ground after being loaded into a mine car, so that the problems of high labor intensity, low cleaning efficiency, poor production environment and the like exist. The mud pump is used for cleaning and stirring the sludge in the sedimentation tank by wind power or machinery to make slurry, the diluted slurry is discharged out of the mine from the sedimentation tank by the mud pump, and the slurry is concentrated and dehydrated on the ground, so that the problems of large pipeline abrasion, high power consumption, more ground facilities and the like exist.
Disclosure of Invention
The invention aims at the technical problems and overcomes the defects of the prior art, and provides a method for cleaning sludge in a mine sedimentation tank, which comprises the sedimentation tank and a slurry pump, wherein the slurry pump is arranged in the sedimentation tank, and further comprises a hydrocyclone, a filter press, a first water sump, a second water sump, a first clean water pump and a second clean water pump, and the sludge cleaning process comprises the following steps: sedimentation tank sludge → slurry pump conveying → hydrocyclone concentration → filter press dehydration → loading, specifically:
a slurry pump in the sedimentation tank pumps out the slurry which is made into slurry, and the slurry is fed into a feed inlet of the hydrocyclone through a slurry pipe; the mud is acted by a hydrocyclone to obtain settled sand and overflow, the settled sand is fed into a filter press by the hydrocyclone for dehydration, the overflow is returned to a sedimentation tank by a return pipe for sedimentation or slurry making, the sedimentation tank is connected with a first water sump, and the first water sump is connected with a first clean water pump; and dewatering the settled sand by a filter press to obtain a filter cake and filtrate, directly loading and transporting the filter cake, and discharging the filtrate from the clean water pump II after the filtrate flows into the sump II.
The technical effects are as follows: the sludge cleaning method for the mine sedimentation tank adopts the slurry pump to extract sludge, and the sludge is concentrated through the hydrocyclone and dehydrated through the filter press to finally obtain two products of filter cake and filtrate, so that the whole process mechanized operation can be realized, the transportation or the transportation of the two products can be facilitated, the transportation cost and the pipeline abrasion can be reduced, and the comprehensive utilization of the sludge and the water resource can be realized.
The technical scheme of the invention is further defined as follows:
according to the method for cleaning the sludge in the mine sedimentation tank, the flocculating agent is added to the water outlet of the water return pipe, so that the sedimentation speed of overflowing and returning to the sedimentation tank is increased.
In the method for cleaning sludge in the mine sedimentation tank, the flocculating agent is polyacrylamide or polyaluminium chloride.
In the method for cleaning the sludge in the mine sedimentation tank, the hydrocyclone is used for separating two fluids by using a centrifugal force field, and the concentration of settled sand is more than or equal to 40 percent.
According to the method for cleaning the sludge in the mine sedimentation tank, solid-liquid separation is carried out by the filter press, the water content of a filter cake is controlled within 15%, and the concentration of filtrate is controlled within 0.5%.
The method for cleaning the sludge in the mine sedimentation tank is characterized in that the filter press is one of a plate-and-frame filter press, a box-type filter press, a vertical filter press and a belt filter press.
In the method for cleaning sludge in the mine sedimentation tank, the water content of the filter cake directly loaded and transported is less than or equal to 15 percent.
According to the method for cleaning the sludge in the mine sedimentation tank, when the sludge in the sedimentation tank comes from mineral powder in the mine lifting process, the filter cake is an ore-containing filter cake, and the filter cake is transported to a mine belt way after being loaded with an ore and lifted to the ground along with the ore.
The invention has the beneficial effects that:
(1) the hydrocyclone of the invention utilizes the centrifugal force field to separate two fluids, mainly has the concentration function, and obtains two products of settled sand and overflow by concentrating the pumped slurry, wherein the concentration of the settled sand can exceed 40 percent, so the volume of the slurry fed into the filter press is greatly reduced, and the hydrocyclone has the advantages of compact structure, simple and convenient operation, high separation efficiency, large production capacity and the like;
(2) the filter press can extract solids in the slurry, mainly plays a role in dehydration, and dehydrates the settled sand fed by the hydrocyclone to obtain two products, namely a filter cake and filtrate, so as to realize solid-liquid separation;
(3) according to the invention, the filter press is used for dewatering the settled sand of the hydrocyclone before feeding, so that the concentration of slurry fed into the filter press can be improved, and the dewatering efficiency of the filter press is improved;
(4) the overflow of the hydrocyclone returns to the sedimentation tank for sedimentation or slurry making, thereby realizing closed cycle of sludge treatment in the sedimentation tank, being beneficial to protecting the field environment and realizing clean production;
(5) the filtrate of the filter press flows into the sump and is discharged to various water-requiring points through the clean water pump, so that the filtrate can be used as water for mine production, the cyclic utilization of water resources is realized, and the pipeline abrasion and the drainage cost are reduced.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
The flow of the method for cleaning sludge in the mine sedimentation tank provided by the embodiment is shown in fig. 1.
A large iron mine for converting certain surface mining into underground mining adopts a construction idea of total planning and staged construction and is provided with transportation levels of four stages of 0m, -120 m, -240 m and-360 m. At present, water gushing from a stope is horizontally collected to a drainage ditch of-120 m through an air inlet raise shaft, a crack structure and the like by each section, then enters a drainage tunnel of-360 m stage transportation level through a drainage well, flows into a water sump of a central water pump room, and is precipitated by 6 sedimentation tanks before entering the water sump. According to the safety regulations of metal and nonmetal mines, the mine needs to clean sludge in a sump, a sedimentation tank and a ditch every year so as to ensure the normal operation of drainage equipment.
The method is applied, the sludge in the sedimentation tank is cleaned at the transportation level of-360 m, the sludge is slurried by a wind power or mechanical stirring device arranged in the sedimentation tank, a slurry pump is adopted to pump out the slurried sludge, the slurry is fed into a feed inlet of a hydrocyclone through a slurry pipeline, the slurry is acted by the hydrocyclone to obtain settled sand and overflow, the settled sand is fed into a filter press by the hydrocyclone for dehydration, the overflow returns to the sedimentation tank through a water return pipe for settlement or slurrying, the settled sand is dehydrated by the filter press to obtain filter cake and filtrate, the filter cake can be directly loaded and transported (when the filter cake is an ore-containing filter cake, the filter cake can be unloaded into a transportation belt and lifted to the ground), and the filtrate flows into a second water sump and then is discharged by a second clear water pump.
Sludge in the sedimentation tank is stirred and made into slurry and then is conveyed by a slurry pump, so that mechanical cleaning operation is realized, the labor intensity of workers is reduced, and the working efficiency is improved; the filter cake has low water content and can be directly loaded and transported, compared with long-distance and high-concentration slurry transportation, the pipeline abrasion in the slurry transportation process is avoided, and when the ore content grade of the filter cake is higher, the filter cake can be lifted to the ground along with the ore for processing; the filtrate can be recycled as mine production water after entering the water sump, so that water resources and mine drainage cost are saved.
In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.
Claims (8)
1. The mine sedimentation tank sludge cleaning method comprises a sedimentation tank and a slurry pump, wherein the slurry pump is arranged in the sedimentation tank, and the mine sedimentation tank sludge cleaning method is characterized in that: still include hydrocyclone, pressure filter, sump one, sump two, clean water pump one and clean water pump two, the silt clearance flow is: sedimentation tank sludge → slurry pump conveying → hydrocyclone concentration → filter press dehydration → loading, specifically:
the slurry pump in the sedimentation tank pumps out the slurry which is made into slurry, and the slurry is fed into a feed port of the hydrocyclone through a slurry pipe; the slurry is acted by the hydrocyclone to obtain settled sand and overflow, the settled sand is fed into the filter press by the hydrocyclone for dehydration, the overflow is returned to the sedimentation tank by a water return pipe for sedimentation or slurry making, the sedimentation tank is connected with the first water sump, and the first water sump is connected with the first clean water pump; and dewatering the settled sand by the filter press to obtain a filter cake and filtrate, directly loading and transporting the filter cake, and discharging the filtrate from the clean water pump II after the filtrate flows into the water sump II.
2. The method for cleaning sludge in the mine sedimentation tank as claimed in claim 1, wherein: and a flocculating agent is added to a water outlet of the water return pipe, so that the sedimentation speed of overflowing and returning to the sedimentation tank is increased.
3. The method for cleaning sludge in the mine sedimentation tank as claimed in claim 1, wherein: the flocculant is polyacrylamide or polyaluminium chloride.
4. The method for cleaning sludge in the mine sedimentation tank as claimed in claim 1, wherein: the hydrocyclone utilizes a centrifugal force field to separate two fluids, and the concentration of settled sand is more than or equal to 40%.
5. The method for cleaning sludge in the mine sedimentation tank as claimed in claim 1, wherein: and the filter press performs solid-liquid separation, the water content of a filter cake is controlled within 15%, and the concentration of filtrate is controlled within 0.5%.
6. The method for cleaning sludge in the mine sedimentation tank as claimed in claim 5, wherein: the filter press is one of a plate-and-frame filter press, a box-type filter press, a vertical filter press and a belt filter press.
7. The method for cleaning sludge in the mine sedimentation tank as claimed in claim 1, wherein: the water content of the filter cake directly loaded and transported is less than or equal to 15 percent.
8. The method for cleaning sludge in the mine sedimentation tank as claimed in claim 1, wherein: when the sludge in the sedimentation tank comes from mineral powder in the mine lifting process, the filter cake is an ore-containing filter cake, and the filter cake is transported to a mine belt channel after being loaded with the truck and lifted to the ground along with the ore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110438990.7A CN113105010A (en) | 2021-04-23 | 2021-04-23 | Method for cleaning sludge in mine sedimentation tank |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110438990.7A CN113105010A (en) | 2021-04-23 | 2021-04-23 | Method for cleaning sludge in mine sedimentation tank |
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| CN113105010A true CN113105010A (en) | 2021-07-13 |
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| CN202110438990.7A Pending CN113105010A (en) | 2021-04-23 | 2021-04-23 | Method for cleaning sludge in mine sedimentation tank |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115445320A (en) * | 2022-08-31 | 2022-12-09 | 晋能控股装备制造集团有限公司寺河煤矿 | Mine water underground treatment process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115445320A (en) * | 2022-08-31 | 2022-12-09 | 晋能控股装备制造集团有限公司寺河煤矿 | Mine water underground treatment process |
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Application publication date: 20210713 |
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