CN105858964B - A kind of wet coal preparation factory tail coal Slurry treatment method - Google Patents
A kind of wet coal preparation factory tail coal Slurry treatment method Download PDFInfo
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- CN105858964B CN105858964B CN201610326763.4A CN201610326763A CN105858964B CN 105858964 B CN105858964 B CN 105858964B CN 201610326763 A CN201610326763 A CN 201610326763A CN 105858964 B CN105858964 B CN 105858964B
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
-
- 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
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- 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
-
- 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
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
-
- 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
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- 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
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Treatment Of Sludge (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a kind of wet coal preparation factory tail coal Slurry treatment method, this method is related to two sections of tail coal muddy water concentrations, two-stage recovery methods, comprising: obtains the tail coal muddy water hardness number；When the tail coal muddy water hardness number is lower than first threshold, flocculating agent is added into one section of thickener；Obtain one section of thickener overflow concentration value；When one section of thickener overflow concentration value is higher than second threshold, flocculant is added into one section of thickener；When one section of thickener overflow concentration is not higher than second threshold, one section of thickener overflow is multiplexed as recirculated water.The present invention can increase to greatest extent screen-bowl centrifuge feeding, it is corresponding reduce the feeding of tail coal mud filter press and two sections of thickener feedings, reach reduction found the factory investment, improve tail coal mud recovery efficiency, save the purpose of coal, water resource.
Description
Technical field
The invention belongs to wet coal preparation factory tail coal Slurry treatment technical fields, more particularly to a kind of wet coal preparation factory tail coal
Slurry treatment method.
Background technique
Tail coal Slurry treatment is one of long-standing production technology problem of wet coal preparation factory of China, traditional single hop concentration
Single hop recovery process, causes that coal preparation plant's washing wastewater is high, a large amount of tail coal muddy water outlets, causes the tight of coal and water resource
The serious destruction with environment is wasted again；In addition when fine fraction content is high in tail coal mud, tail coal filter press load increases, filters pressing week
Phase is long, and filter cake moisture is high, and capital expenditure is high.
Summary of the invention
In order to solve the above-mentioned problems in the prior art, the present invention provides a kind of wet coal preparation factory tail coal Slurry treatment
Method.
The technical scheme is that a kind of wet coal preparation factory tail coal Slurry treatment method, this method master is to be used to be set
Standby includes that one section of thickener, two sections of thickeners, sieve bend, screen-bowl centrifuge and tail coal filter press, this method relate to
And two sections of tail coal muddy water concentrations, two-stage recovery techniques, comprising:
Obtain the tail coal muddy water hardness number；
When the tail coal muddy water hardness number is lower than first threshold, flocculating agent is added into one section of thickener；
Obtain one section of thickener overflow concentration value；
When one section of thickener overflow concentration value is higher than second threshold, flocculation is added into one section of thickener
Agent；When one section of thickener overflow concentration is not higher than second threshold, one section of thickener overflow is multiplexed as recirculated water.
Preferably, the first threshold is with CaCO3It is calculated as 450mg/L.
Preferably, the second threshold is 2.0g/L.
Preferably, the flocculant includes polyacrylamide.
Preferably, the flocculating agent includes calcium chloride or magnesium chloride.
The advantages and beneficial effects of the present invention are: adding medicament in one section of thickener pan feeding (flocculant is added, or adds
Enter flocculant and flocculating agent), so that tail coal mud is entered underflow to greatest extent, by processing capacity is big, product moisture is low, electrical energy consumption per tonne of raw coal phase
Lower screen-bowl centrifuge is recycled, two sections of thickener feedings are greatly decreased, reduces the work of tail coal filter press
Load reduces press filteration system and two sections of thickener costs of investment.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the flow diagram of an embodiment of the present invention.
Specific embodiment
Further description of the specific embodiments of the present invention with reference to the accompanying drawings and examples, and following embodiment is only used
In clearly illustrating technical solution of the present invention, and not intended to limit the protection scope of the present invention.
As shown in Figure 1, being the flow diagram of an embodiment of the present invention, a kind of wet coal preparation factory tail coal Slurry treatment system
System is mainly made of one section of concentration, one section of recycling, two sections of concentrations, two sections of 4 procedures of recycling.
One section of concentration: wet coal preparation factory tail coal muddy water enters one section of thickener and carries out concentration operation.Obtain the tail coal mud
Hydraulic angle value, when the tail coal muddy water hardness number < 450mg/L is (with CaCO3Meter, i.e. 25.2 Germany's degree) when, it is dense to described one section
Flocculating agent is added in contracting machine (as shown in A in figure)；When the tail coal muddy water hardness number >=450mg/L is (with CaCO3Meter, i.e., 25.2
German degree) when, then it does not need to add.
The flocculating agent of the present embodiment preferably uses the inorganic electrolyte containing calcium and magnesium ion such as calcium chloride, magnesium chloride.
One section of thickener overflow concentration value is obtained, as one section of thickener overflow concentration value > 2.0g/L, to described
Flocculant is added in one section of thickener (as shown in A in figure).Under the action of medicament, tail coal mud accelerated sedimentation completes solid, liquid point
From.Tail coal mud is largely settled down to one section of thickener underflow, to obtain peace and quiet overflow.
Flocculant is high molecular polymer in the present embodiment, can preferably select polyacrylamide, more preferably select
With anionic, degree of hydrolysis 33% or so, polyacrylamide of the molecular weight between 600~10,000,000.
As one section of thickener overflow concentration≤2.0g/L, it can be used as recirculated water and return to system multiplexing (as shown in B in figure)；
As one section of thickener overflow concentration > 2.0g/L, then enter two sections of thickeners (as shown in C in figure).
One section of recycling: one section of thickener underflow enters sieve bend, coal in the incorporation of sieve bend on-the-sieve material, and undersize material enters
Screen-bowl centrifuge carries out dehydration recycling.The dehydration product of screen-bowl centrifuge due to moisture relatively
It is low and loose, can mix in coal, screen-bowl centrifuge centrifugate, filtrate enter two sections of thickeners.
Two sections of concentrations: medicament (flocculant is added, or flocculant and flocculating agent is added) is added in two sections of thickeners, makes tail coal
Mud accelerated sedimentation, two sections of thickener underflows enter tail coal filter press, and the clear overflow of depth returns to system multiplexing as recirculated water.
Two sections of recycling: two sections of thickener underflows are recycled by tail coal filter press, are realized and are separated by solid-liquid separation, and tail coal filter press filtrate is made
System multiplexing is returned to for recirculated water.
The present invention can provide a kind of novel two sections of two sections of concentrations suitable for wet coal preparation factory tail slurry circulating system to return
Knock off skill, it is intended to which the feeding for increasing screen-bowl centrifuge slows down tail coal filter press workload, reduces capital construction and throws
Money；Shorten tail coal mud recovery time, improves working efficiency.
The filter cake moisture of tail coal filter press output is high, and tacky agglomerating, can only be used as cheap low calorie fuels, sell on the spot
It sells.The dehydration product moisture of screen-bowl centrifuge is low and loose, can mix in power cleaned coal (middle coal), as power generation
Station-service coal.Both of the above sale price difference is big, after implementing this patent, can optimize the product structure of coal preparation plant, increase the performance of enterprises.
The above is only preferred embodiments of the invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvements and modifications can also be made, these improvements and modifications
Also it should be regarded as protection scope of the present invention.
Claims (3)
1. a kind of wet coal preparation factory tail coal Slurry treatment method, this method master equipment to be used includes one section of thickener, two sections
Thickener, sieve bend, screen-bowl centrifuge and tail coal filter press, this method is using two sections of tail coal muddy water concentrations, two
Section recovery process characterized by comprising
Wet coal preparation factory tail coal muddy water enters one section of thickener and carries out one section of concentration, obtains tail coal muddy water hardness number, works as institute
When stating tail coal muddy water hardness number lower than first threshold, flocculating agent is added into one section of thickener；When the tail coal muddy water is hard
When angle value is not less than the first threshold, then do not need to add；One section of thickener overflow concentration value is obtained, is concentrated when described one section
When machine effluent concentration value is higher than second threshold, flocculant is added into one section of thickener；When one section of thickener overflow
When concentration is not higher than second threshold, it can be used as recirculated water and return to system multiplexing；
One section of thickener underflow enters the sieve bend, coal in the sieve bend on-the-sieve material incorporation, and undersize material enters
The screen-bowl centrifuge carries out dehydration recycling, carries out one section of recycling；
When one section of thickener overflow concentration value is higher than second threshold, into two sections of thickeners, the sedimentation-filtration dewatering
Centrifugal dehydrator centrifugate, filtrate enter two sections of thickeners, carry out two sections of concentrations；
Two sections of thickener underflows enter the tail coal filter press, and overflow returns to system multiplexing as recirculated water；Described two sections
Thickener underflow is recycled by the tail coal filter press, is carried out two sections of recycling, is realized and be separated by solid-liquid separation, tail coal filter press filtrate is used as and follows
Ring water returns to system multiplexing；
The first threshold is with CaCO3It is calculated as 450mg/L；
The second threshold is 2.0g/L.
2. the wet coal preparation factory tail coal Slurry treatment method described in one of according to claim 1, which is characterized in that the flocculant
Including polyacrylamide.
3. wet coal preparation factory tail coal Slurry treatment method according to claim 2, which is characterized in that the flocculating agent includes
Calcium chloride or magnesium chloride.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610326763.4A CN105858964B (en) | 2016-05-17 | 2016-05-17 | A kind of wet coal preparation factory tail coal Slurry treatment method |
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| CN201610326763.4A CN105858964B (en) | 2016-05-17 | 2016-05-17 | A kind of wet coal preparation factory tail coal Slurry treatment method |
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| CN105858964A CN105858964A (en) | 2016-08-17 |
| CN105858964B true CN105858964B (en) | 2019-01-25 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106237708A (en) * | 2016-09-23 | 2016-12-21 | 苏州三体智能科技有限公司 | A kind of Coal Preparation Plant coal slime dewatering system and method |
| CN106933099B (en) * | 2017-03-06 | 2019-12-10 | 太原理工大学 | Coal preparation plant thickener and filter press medicament adding cooperative control system |
| CN107213982A (en) * | 2017-07-27 | 2017-09-29 | 中国神华能源股份有限公司 | Duff mud treatment system and fine coal slurry processing method |
| CN107597412A (en) * | 2017-09-21 | 2018-01-19 | 淮南矿业(集团)有限责任公司 | One kind drift mud recovery system |
| CN110194516A (en) * | 2019-06-19 | 2019-09-03 | 重庆长能环境科技有限公司 | It is a kind of handle black water flocculant and its application and slime water treatment method |
| CN111635035B (en) * | 2020-06-09 | 2022-04-26 | 欧战备 | Coking coal tailing slurry treatment method and dosing device thereof |
| CN112536159A (en) * | 2020-11-20 | 2021-03-23 | 四川广旺能源发展（集团）有限责任公司唐家河煤矿 | Flotation tailing coal slime secondary concentration recovery process |
| CN113024080A (en) * | 2021-03-05 | 2021-06-25 | 北京科技大学 | Full-tailing slurry two-section type continuous, rapid and deep dewatering system |
| CN115745228A (en) * | 2022-10-25 | 2023-03-07 | 唐山国华科技国际工程有限公司 | System and method for improving feed concentration of sedimentation filtration type centrifugal dehydrator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29716950U1 (en) * | 1997-09-22 | 1997-11-27 | Reiflock-Abwassertechnik GmbH, 76532 Baden-Baden | Device for inoculating sludge with polymers for subsequent dewatering of the sludge |
| CN1792830A (en) * | 2005-10-21 | 2006-06-28 | 赵树彦 | Tech. for treating coal mud water by tow section concentration, tow section recovery |
| CN1948434A (en) * | 2006-11-10 | 2007-04-18 | 张春林 | Two stage dewatering technology of fine coal mud |
-
2016
- 2016-05-17 CN CN201610326763.4A patent/CN105858964B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29716950U1 (en) * | 1997-09-22 | 1997-11-27 | Reiflock-Abwassertechnik GmbH, 76532 Baden-Baden | Device for inoculating sludge with polymers for subsequent dewatering of the sludge |
| CN1792830A (en) * | 2005-10-21 | 2006-06-28 | 赵树彦 | Tech. for treating coal mud water by tow section concentration, tow section recovery |
| CN1948434A (en) * | 2006-11-10 | 2007-04-18 | 张春林 | Two stage dewatering technology of fine coal mud |
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Effective date of registration: 20230602 Address after: 063000 No.8, Beihuan West Road, high tech Zone, Tangshan City, Hebei Province Patentee after: TANGSHAN GUOHUA TECHNOLOGY INTERNATIONAL ENGINEERING Co.,Ltd. Address before: 101300 7 Juyuan West Road, Mapo Town, Shunyi District, Beijing Patentee before: BEIJING GUOHUA TECHNOLOGY Group Ltd. |