CN109279758B - Efficient green mud washing method - Google Patents
Efficient green mud washing method Download PDFInfo
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- CN109279758B CN109279758B CN201811390422.9A CN201811390422A CN109279758B CN 109279758 B CN109279758 B CN 109279758B CN 201811390422 A CN201811390422 A CN 201811390422A CN 109279758 B CN109279758 B CN 109279758B
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- mud
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
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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
- C02F11/127—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering by centrifugation
Abstract
The invention discloses a method for efficiently washing green mud, which comprises the following steps of collecting, pretreating, first-stage centrifugal dealkalization and thickening, second-stage centrifugal dealkalization and washing, and third-stage centrifugal dealkalization and dehydration; the invention adopts a multi-stage centrifugal filtration-washing integrated process technology, realizes the independent treatment of the green mud and the white mud on the premise of not increasing the amount of the dilute white liquid, the pH value of the treated green mud can be reduced to 9.0, the dryness of the materials can reach more than 45 percent, and the green mud can be used for boiler blended combustion desulfurization, building materials and the like; the saved white mud can be used for flue gas desulfurization, papermaking fillers, building materials and the like.
Description
Technical Field
The invention relates to a method for efficiently washing green mud.
Background
The green mud generated in the alkali recovery section of a pulping enterprise is residual waste slag generated after waste liquid generated in the pulping process is diluted, dissolved and filtered by molten inorganic salt after being calcined at high temperature in an alkali furnace, the main components of the green mud are inorganic salts such as calcium, magnesium, iron, sodium, potassium and the like of carbonic acid, silicic acid and sulfuric acid, the particles are fine and smooth, the hand feeling is smooth, and the green mud contains silicon dioxide, magnesium oxide, carbon black and the like which are difficult to filter, so the filtering performance of the green mud is poor. The alkali recovery causticized white mud and green mud have no corrosive and leaching toxicity dangerous characteristics and are listed in a dangerous waste removal management list (environmental soil content No. [2017] 367), but are still treated as dangerous wastes when the pH value exceeds 12.5. At present, most of green mud generated by pulping enterprises at home and abroad is used for landfill, and a small amount of green mud is used for cement blending and proportioning, coal-fired boiler blending and desulphurization or used for brick making.
Common green mud pre-hanging filter generally adopts the slightly bigger white mud of granule as the bed course to wash the green mud and filter, nevertheless will reduce green mud pH value, needs a large amount of shower water, and this has not only increased rare white liquid volume, needs many series connection washings moreover, and equipment investment and area are big. Because the green mud has mixed components, fine particles and difficult filtration, the pH value of the green mud reaches 11.0-14.0, and the mud discharge dryness is generally below 40%, if the green mud is directly buried, not only needs to reinforce and prevent seepage of a stockyard, but also needs to pump the leachate back to a sewage system for treatment, and when the pH value of the green mud exceeds 12.5, the green mud needs to be treated according to dangerous waste. Therefore, the green mud landfill cost and the environmental protection operation cost are high, and the environmental risk is large. With the increasing environmental protection standard, the environmental risk of direct green mud landfill is increasing, and it is a trend to develop an economic and applicable efficient green mud washing and thickening process technology and realize the value-added utilization of green mud.
Disclosure of Invention
Aiming at the problems, the invention adopts a multi-stage centrifugal filtration-washing integrated process technology, realizes the independent treatment of green mud and white mud on the premise of not increasing the amount of dilute white liquid, reduces the pH value of the treated green mud to 9.0, ensures that the dryness of the materials reaches more than 45 percent, and can be used for boiler blending desulfurization, building materials and the like; the saved white mud can be used for flue gas desulfurization, papermaking fillers, building materials and the like.
In order to realize the purpose, the invention adopts the technical scheme that: a method for efficiently washing green mud comprises the following steps:
(1) collecting: collecting raw green mud from a green mud clarifier or (and) a green liquor filtering device into a tank, wherein the SS concentration of the raw green mud is 6000-20000 ppm, the pH value is 12.0-14.0, and the temperature is 60-90 ℃;
(2) pretreatment: adding a flocculating agent into the collecting tank, uniformly stirring and standing; pumping the turbid liquid under the collecting tank into a primary green mud tank, and pumping the supernatant liquid of the collecting tank back to a dilute white liquid tank or a green liquid clarifier; the preparation concentration of the flocculating agent is 1 per mill, and the addition amount of the flocculating agent is 1 per mill-4 per mill of the amount of the treated mud;
(3) first-stage centrifugal dealkalization thickening: adding a flocculating agent into an outlet pipeline of a mud conveying pump of the primary green mud tank, wherein the preparation concentration of the flocculating agent is 5 per mill, and the adding amount of the flocculating agent is 1 per mill-4 per mill of the amount of treated mud; discharging mud from the primary centrifugal machine into a secondary green mud tank;
(4) secondary centrifugal dealkalization washing: adding a flocculating agent into an outlet pipeline of the mud conveying pump of the secondary green mud tank, wherein the preparation concentration of the flocculating agent is 5 per mill, and the adding amount of the flocculating agent is 1 per mill-4 per mill of the amount of the treated mud; the mud discharged by the secondary centrifugal machine enters a tertiary green mud groove;
(5) three-stage centrifugal dealkalization dehydration: and adding a flocculating agent into an outlet pipeline of the mud conveying pump of the third-level green mud tank, wherein the preparation concentration of the flocculating agent is 5 per mill, and the adding amount of the flocculating agent is 1 per mill-4 per mill of the amount of the treated mud.
Further, adding a flocculating agent into the collecting tank, uniformly stirring, stopping stirring after 5-15 minutes, and standing for 10-30 minutes.
Further, the flocculating agent is nonionic polyacrylamide.
Further, the second stage green mud tank dilution water comes from the third stage centrifuge filtrate.
Furthermore, a flocculant adding point is arranged on an outlet pipeline of the pump so as to form a large floc group for facilitating solid-liquid separation.
And further, mixing the filtrates discharged by the primary and secondary centrifuges, feeding the mixed filtrates into a filtrate tank, flocculating and clarifying, returning the supernatant to a large system, and feeding the lower turbid liquid into a primary green sludge tank.
And further, discharging mud by a three-stage centrifugal machine, and allowing the discharged mud to enter a green mud bin for comprehensive utilization.
Further, the dilution water of the third-stage green mud tank comes from evaporating the B-type water or other surplus condensed water.
Further, the characteristics of the green mud discharged after washing: the pH value of the green mud is less than or equal to 9.0, the solid content of the green mud is more than or equal to 45%, the mud yield is 50t/d, the SS of the clarified green liquor is less than or equal to 100mg/L, the hot water supplement amount is less than or equal to 250m3/d, and the flocculant dosage is less than or equal to 1-3 kg/t (for the absolutely dry green mud).
The invention has the beneficial effects that:
1. the invention adopts a multistage centrifugal filtration-washing integrated process technology, does not need white mud as a cushion layer on the premise of not increasing the amount of dilute white liquid, realizes the independent treatment of green mud and white mud, simultaneously reduces the discharge amount of the green mud, reduces the pH value of the treated green mud to 9.0, ensures that the dryness of the materials reaches more than 45 percent, and can be used for boiler blending combustion desulfurization, building materials and the like; the saved white mud can be used for flue gas desulfurization, papermaking fillers, building materials and the like.
2. The technology of the invention can separately treat the green mud, can realize 100% comprehensive utilization of the white mud and the green mud, and is beneficial to saving resources, protecting the environment and reducing the cost.
3. The invention does not increase the dosage of washing water, recycles the filtrate and reduces the alkali loss.
4. The invention improves the dryness of the discharged mud and is convenient for comprehensive utilization.
Detailed Description
The present invention is described in detail below for the purpose of better understanding technical solutions of the present invention by those skilled in the art, and the description of the present invention is only exemplary and explanatory and should not be construed as limiting the scope of the present invention in any way.
Example 1: a method for efficiently washing green mud comprises the following steps:
(1) collecting: collecting raw green mud from a green mud clarifier or (and) a green liquor filtering device into a tank, wherein the SS concentration of the raw green mud is 6000ppm, the pH value is 12.0, and the temperature is 60 ℃;
(2) pretreatment: adding a flocculating agent into the collecting tank, uniformly stirring and standing; pumping the turbid liquid under the collecting tank into a primary green mud tank, and pumping the supernatant liquid of the collecting tank back to a dilute white liquid tank or a green liquid clarifier; the preparation concentration of the flocculating agent is 1 per mill, and the addition amount is 2 per mill of the amount of the treated mud;
(3) first-stage centrifugal dealkalization thickening: adding a flocculating agent into an outlet pipeline of a mud conveying pump of the primary green mud tank, wherein the preparation concentration of the flocculating agent is 5 per mill, and the addition amount of the flocculating agent is 2 per mill of the amount of treated mud; discharging mud from the primary centrifugal machine into a secondary green mud tank;
(4) secondary centrifugal dealkalization washing: adding a flocculating agent into an outlet pipeline of the mud conveying pump of the secondary green mud tank, wherein the preparation concentration of the flocculating agent is 5 per mill, and the addition amount of the flocculating agent is 2 per mill of the amount of the treated mud; the mud discharged by the secondary centrifugal machine enters a tertiary green mud groove;
(5) three-stage centrifugal dealkalization dehydration: and (3) adding a flocculating agent into an outlet pipeline of the mud conveying pump of the third-level green mud tank, wherein the preparation concentration of the flocculating agent is 5 per mill, and the adding amount of the flocculating agent is 2 per mill of the amount of the treated mud.
Preferably, the flocculant is a nonionic polyacrylamide.
Preferably, the flocculating agent is added into the collecting tank and stirred uniformly, stirring is stopped after 5 minutes, and the collecting tank is kept still for 10 minutes.
Preferably, the secondary green mud tank dilution water is from a tertiary centrifuge filtrate.
Preferably, the flocculant is added at a point on the outlet pipeline of the pump to form large flocs for facilitating solid-liquid separation.
Preferably, the filtrates discharged by the primary and secondary centrifuges are mixed and enter a filtrate tank, the supernatant returns to a large system after flocculation and clarification, and the lower turbid liquid enters a primary green sludge tank.
Preferably, the sludge discharged by the three-stage centrifuge enters a green sludge bin for comprehensive utilization.
Preferably, the tertiary green mud tank dilution water is derived from evaporating class B water or other surplus condensate.
Preferably, the characteristics of the green mud discharged after washing: the pH value of the green mud is less than or equal to 9.0, the solid content of the green mud is more than or equal to 45 percent, the mud yield is 50t/d, the SS of the clarified green liquor is less than or equal to 100mg/L, the hot water supplement amount is less than or equal to 250m3/d, and the flocculant dosage is less than or equal to 1.5kg/t (for the absolutely dry green mud).
Example 2: a method for efficiently washing green mud comprises the following steps:
(1) collecting: collecting raw green mud from a green mud clarifier or (and) a green liquor filtering device into a tank, wherein the SS concentration of the raw green mud is 8000ppm, the pH value is 14.0, and the temperature is 80 ℃;
(2) pretreatment: adding a flocculating agent into the collecting tank, uniformly stirring and standing; pumping the turbid liquid under the collecting tank into a primary green mud tank, and pumping the supernatant liquid of the collecting tank back to a dilute white liquid tank or a green liquid clarifier; the preparation concentration of the flocculating agent is 1 per mill, and the addition amount of the flocculating agent is 4 per mill of the amount of the treated mud;
(3) first-stage centrifugal dealkalization thickening: adding a flocculating agent into an outlet pipeline of a mud conveying pump of the primary green mud tank, wherein the preparation concentration of the flocculating agent is 5 per mill, and the addition amount of the flocculating agent is 4 per mill of the amount of treated mud; discharging mud from the primary centrifugal machine into a secondary green mud tank;
(4) secondary centrifugal dealkalization washing: adding a flocculating agent into an outlet pipeline of the mud conveying pump of the secondary green mud tank, wherein the preparation concentration of the flocculating agent is 5 per mill, and the addition amount of the flocculating agent is 4 per mill of the amount of the treated mud; the mud discharged by the secondary centrifugal machine enters a tertiary green mud groove;
(5) three-stage centrifugal dealkalization dehydration: and (3) adding a flocculating agent into an outlet pipeline of the mud conveying pump of the third-level green mud tank, wherein the preparation concentration of the flocculating agent is 5 per mill, and the adding amount of the flocculating agent is 4 per mill of the amount of treated mud.
Preferably, the flocculant is a nonionic polyacrylamide.
Preferably, a flocculating agent is added into the collecting tank and uniformly stirred, stirring is stopped after 5-15 minutes, and standing is carried out for 20 minutes.
Preferably, the secondary green mud tank dilution water is from a tertiary centrifuge filtrate.
Preferably, the flocculant is added at a point on the outlet pipeline of the pump to form large flocs for facilitating solid-liquid separation.
Preferably, the filtrates discharged by the primary and secondary centrifuges are mixed and enter a filtrate tank, the supernatant returns to a large system after flocculation and clarification, and the lower turbid liquid enters a primary green sludge tank.
Preferably, the sludge discharged by the three-stage centrifuge enters a green sludge bin for comprehensive utilization.
Preferably, the tertiary green mud tank dilution water is derived from evaporating class B water or other surplus condensate.
Preferably, the characteristics of the green mud discharged after washing: the pH value of the green mud is less than or equal to 9.0, the solid content of the green mud is more than or equal to 45 percent, the mud yield is 50t/d, the SS of the clarified green liquor is less than or equal to 100mg/L, the hot water supplement amount is less than or equal to 250m3/d, and the flocculant dosage is less than or equal to 2.0 kg/t.
Example 3: a method for efficiently washing green mud comprises the following steps:
(1) collecting: collecting raw green mud from a green mud clarifier or (and) a green liquor filtering device into a tank, wherein the SS concentration of the raw green mud is 15000ppm, the pH value is 14.0, and the temperature is 90 ℃;
(2) pretreatment: adding a flocculating agent into the collecting tank, uniformly stirring and standing; pumping the turbid liquid under the collecting tank into a primary green mud tank, and pumping the supernatant liquid of the collecting tank back to a dilute white liquid tank or a green liquid clarifier; the preparation concentration of the flocculating agent is 1 per mill, and the addition amount of the flocculating agent is 4 per mill of the amount of the treated mud;
(3) first-stage centrifugal dealkalization thickening: adding a flocculating agent into an outlet pipeline of a mud conveying pump of the primary green mud tank, wherein the preparation concentration of the flocculating agent is 5 per mill, and the addition amount of the flocculating agent is 4 per mill of the amount of treated mud; discharging mud from the primary centrifugal machine into a secondary green mud tank;
(4) secondary centrifugal dealkalization washing: adding a flocculating agent into an outlet pipeline of the mud conveying pump of the secondary green mud tank, wherein the preparation concentration of the flocculating agent is 5 per mill, and the addition amount of the flocculating agent is 4 per mill of the amount of the treated mud; the mud discharged by the secondary centrifugal machine enters a tertiary green mud groove;
(5) three-stage centrifugal dealkalization dehydration: and (3) adding a flocculating agent into an outlet pipeline of the mud conveying pump of the third-level green mud tank, wherein the preparation concentration of the flocculating agent is 5 per mill, and the adding amount of the flocculating agent is 4 per mill of the amount of treated mud.
Preferably, the flocculant is a nonionic polyacrylamide.
Preferably, the flocculating agent is added into the collecting tank and stirred uniformly, stirring is stopped after 15 minutes, and the collecting tank is kept still for 30 minutes.
Preferably, the secondary green mud tank dilution water is from a tertiary centrifuge filtrate.
Preferably, the flocculant is added at a point on the outlet pipeline of the pump to form large flocs for facilitating solid-liquid separation.
Preferably, the filtrates discharged by the primary and secondary centrifuges are mixed and enter a filtrate tank, the supernatant returns to a large system after flocculation and clarification, and the lower turbid liquid enters a primary green sludge tank.
Preferably, the sludge discharged by the three-stage centrifuge enters a green sludge bin for comprehensive utilization.
Preferably, the tertiary green mud tank dilution water is derived from evaporating class B water or other surplus condensate.
Preferably, the characteristics of the green mud discharged after washing: the pH value of the green mud is less than or equal to 9.0, the solid content of the green mud is more than or equal to 45 percent, the mud yield is 50t/d, the SS of the clarified green liquor is less than or equal to 100mg/L, the hot water supplement amount is less than or equal to 250m3/d, and the flocculant dosage is less than or equal to 3 kg/t.
The parameters of example 1, example 2 and example 3 are shown in the following table:
it should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes may be made without departing from the principle of the present invention, and the technical features described above may be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.
Claims (7)
1. A method for efficiently washing green mud is characterized by comprising the following steps: the method comprises the following steps:
(1) collecting: collecting raw green mud from a green mud clarifier or/and a green liquor filtering device into a collecting tank, wherein the SS concentration of the raw green mud is 6000-20000 ppm, the pH value is 12.0-14.0, and the temperature is 60-90 ℃;
(2) pretreatment: adding a flocculating agent into the collecting tank, uniformly stirring, stopping stirring after 5-15 minutes, and standing for 10-30 minutes; pumping the turbid liquid under the collecting tank into a primary green mud tank, and pumping the supernatant liquid of the collecting tank back to a dilute white liquid tank or a green liquid clarifier; the preparation concentration of the flocculating agent is 1 per mill, and the addition amount is 1 per mill-4 per mill of the amount of the treated mud;
(3) first-stage centrifugal dealkalization thickening: adding a flocculating agent into an outlet pipeline of a mud conveying pump of the primary green mud tank, wherein the preparation concentration of the flocculating agent is 5 per mill, and the adding amount of the flocculating agent is 1 per mill-4 per mill of the amount of the treated mud; discharging mud from the primary centrifugal machine into a secondary green mud tank;
(4) secondary centrifugal dealkalization washing: adding a flocculating agent into an outlet pipeline of the mud conveying pump of the secondary green mud tank, wherein the preparation concentration of the flocculating agent is 5 per mill, and the adding amount of the flocculating agent is 1 per mill-4 per mill of the amount of the treated mud; the mud discharged by the secondary centrifugal machine enters a tertiary green mud groove;
(5) three-stage centrifugal dealkalization dehydration: adding a flocculating agent into an outlet pipeline of a mud conveying pump of the third-level green mud tank, wherein the preparation concentration of the flocculating agent is 5 per mill, and the adding amount of the flocculating agent is 1 per mill-4 per mill of the amount of the treated mud; this step is processed in a three-stage centrifuge;
wherein the flocculating agent is nonionic polyacrylamide.
2. The method for washing high-efficiency green mud according to claim 1, wherein the secondary green mud tank dilution water is obtained from a tertiary centrifuge filtrate.
3. The efficient green mud washing method as recited in claim 1, wherein the flocculant is added to the outlet pipe of the pump to form large flocs for solid-liquid separation.
4. The efficient green mud washing method according to claim 1, wherein the filtrates from the primary and secondary centrifuges are mixed and fed into a filtrate tank, the supernatant is returned to the large system after flocculation and clarification, and the lower turbid liquid is fed into the primary green mud tank.
5. The efficient green mud washing method according to claim 1, wherein the three-stage centrifuge discharges mud into a green mud bin for comprehensive utilization.
6. The method for washing high-efficiency green mud according to claim 1, wherein the dilution water of the tertiary green mud tank is obtained by evaporating the B-type water or other surplus condensed water.
7. The efficient green mud washing method according to claim 1, wherein the characteristics of the green mud discharged after washing are as follows: the pH value of the green mud is less than or equal to 9.0, the solid content of the green mud is more than or equal to 45 percent, the mud yield is 50t/d, the SS of clear green liquor is less than or equal to 100mg/L, and the hot water supplement amount is less than or equal to 250m3And/d, the dosage of the flocculating agent relative to the absolute dry sludge is less than or equal to 3 kg/t.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005220228A (en) * | 2004-02-05 | 2005-08-18 | Mitsui Eng & Shipbuild Co Ltd | Manufacturing process and manufacturing equipment for combustion improver which uses organic sludge as raw material |
| CN102372409A (en) * | 2011-09-27 | 2012-03-14 | 山东亚太森博浆纸有限公司 | Treatment method of paper pulp biological sludge |
| JP2013158749A (en) * | 2012-02-08 | 2013-08-19 | Yanagawa Engineering Co Ltd | Concentration/dehydration device |
| WO2018057325A1 (en) * | 2016-09-23 | 2018-03-29 | Dow Global Technologies Llc | Process for tailings remediation |
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| CA1024274A (en) * | 1973-11-28 | 1978-01-10 | Pulp And Paper Research Institute Of Canada | Treatment of pulp mill effluents |
| RU2079454C1 (en) * | 1995-07-18 | 1997-05-20 | Грудинин Владимир Павлович | Method of processing excessive activated sludge |
| CN102838155A (en) * | 2012-09-28 | 2012-12-26 | 湖南文理学院 | Causticizing method and process device for preparing precipitated calcium carbonate by recycling papermaking alkali |
| FI127442B (en) * | 2014-03-31 | 2018-06-15 | Upm Kymmene Corp | Method and system for reducing phosphorus in effluent or filtrate |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005220228A (en) * | 2004-02-05 | 2005-08-18 | Mitsui Eng & Shipbuild Co Ltd | Manufacturing process and manufacturing equipment for combustion improver which uses organic sludge as raw material |
| CN102372409A (en) * | 2011-09-27 | 2012-03-14 | 山东亚太森博浆纸有限公司 | Treatment method of paper pulp biological sludge |
| JP2013158749A (en) * | 2012-02-08 | 2013-08-19 | Yanagawa Engineering Co Ltd | Concentration/dehydration device |
| WO2018057325A1 (en) * | 2016-09-23 | 2018-03-29 | Dow Global Technologies Llc | Process for tailings remediation |
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