CN103102053A - Recycling method of papermaking sludge - Google Patents
Recycling method of papermaking sludge Download PDFInfo
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- CN103102053A CN103102053A CN2013100814274A CN201310081427A CN103102053A CN 103102053 A CN103102053 A CN 103102053A CN 2013100814274 A CN2013100814274 A CN 2013100814274A CN 201310081427 A CN201310081427 A CN 201310081427A CN 103102053 A CN103102053 A CN 103102053A
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Abstract
The invention relates to a treatment method of papermaking sludge, and particularly relates to a recycling method of the papermaking sludge. The recycling method of the papermaking sludge comprises the following main treatment steps of: (1) depositing and concentrating; (2) dewatering; (3) scattering and mixing; and (4) combustion for utilization, wherein waste residues left after full combustion are used as the raw materials of cement or bricks. According to the recycling method, the dewatered papermaking sludge is mixed with coal and then conveyed to the circulating fluid bed boiler of a heat power station as fuel to be combusted, and thus inorganics contained in the papermaking sludge are utilized, and fuel coal is saved, so that certain economic benefit is brought about for an enterprise; and because a stabilizer and a flocculant are added to a hardening and tempering pond, combusted papermaking sludge waste residues have better structural characteristics and can be used for manufacturing the cement and the bricks; and therefore, the sufficient utilization of organics and inorganics which are contained in the papermaking sludge is realized, so that the reduction, stabilization and harmlessness of papermaking sludge treatment are substantially achieved.
Description
Technical field
The present invention relates to the treatment process of paper mill sludge, particularly a kind of Resourceful treatment method of paper-making sludge.
Background technology
The process of pulping and paper-making can produce paper mill sludge, and the heavy demand to paper in society has also just produced a large amount of paper mill sludges.
the method of filling up and combustion method for the ordinary method of processing paper mill sludge, rule is filled up in employing need to take a large amount of soil and can be to the environment around filling up, and adopt the burning rule just that paper mill sludge is pollution-free, reduce the processing of paper mill sludge amount, and paper mill sludge is as the waste residue product of waste paper pulp-making and log slurrying, although its chemical composition is very complicated, but organism can account for 60%～90% in paper mill sludge, other inorganicss and metal species impurity account for 10%～30%, and adopt the above-mentioned method of filling up and combustion method all can not take full advantage of paper mill sludge.
Prior art is for the paper mill sludge recycling, and Chinese patent application number is 200910192533.3 to disclose a kind of Resourceful treatment method of paper-making sludge, comprises the following steps:
(1) paper mill sludge is first carried out mechanical dehydration, then break up granulation, form mud granule;
(2) utilize high-temp waste gas and high temperature furnace slag to carry out secondary drying to mud granule, then burn; High-temp waste gas and high temperature furnace slag recycle that the mud granule burning produces, the low temperature waste gas that the mud granule secondary drying produces is sent into reaction tank, and the low temperature slag that the mud granule secondary drying produces is sent into separate tank;
(3) add water in separate tank, make the solvend dissolving in the low temperature slag, then separate, the recovery solution of generation is delivered to reaction tank, and waste residue is discharged system;
(4) thin up in the reaction tank, low temperature waste gas with reclaim solution reaction, obtain product solution;
(5) product solution is delivered to extraction pond extraction, the product that obtains is sent into post-processing stages, and the waste water of generation is sent reaction tank back to and recycled.
above-mentioned available technology adopting spiral dehydration equipment directly carries out mechanical dehydration to paper mill sludge, then just burn after the paper mill sludge secondary drying after dewatering, burn because the paper mill sludge after just merely drying acts as a fuel in this combustion processes, because its impurity is more, the waste gas that causes combustion processes to produce is too much, can not react with oxygen preferably, make paper mill sludge efficiency of combustion generally lower, namely can not utilize fully the organism in paper mill sludge, further, paper mill sludge after burning becomes waste residue, also fully resource utilization paper mill sludge will just be abandoned directly, or can produce the problem that paper mill sludge takes up an area and pollutes.
Summary of the invention
The object of the invention is to the defective that exists in above-mentioned prior art, the present invention proposes a kind ofly can take full advantage of the organism of paper mill sludge and a kind of Resourceful treatment method of paper-making sludge of inorganics.
Purpose of the present invention is achieved through the following technical solutions:
A kind of Resourceful treatment method of paper-making sludge is provided, has comprised the following steps:
Step (1): precipitation is concentrated: paper mill sludge waste water is put into mud modified pond, and add the stablizer of 5～10mg/L and the flocculation agent of 1.5～3mg/L in mud modified pond, concentrated 1～2 hour of precipitation is 85～90% paper mill sludge until paper mill sludge waste water is isolated water ratio; Wherein, described stablizer is white lime, and described flocculation agent is polymerize aluminum chloride;
Step (2): primary dewatering: paper mill sludge in step (1) is sent into pressure filter, is 40%～55% paper mill sludge to water ratio with dehydration of papermaking sludge by pressure filter;
Step (3): break up mixing: the paper mill sludge after step (2) dehydration is broken up and is uniformly mixed into the mud powder with coal dust, and wherein, the ratio of weight and number of paper mill sludge and coal dust is 1:10～15;
Step (4): burning utilizes: the mud powder in step (3) is sent into circular fluid bed, carry out first drying, continuous heating and three processes of fully burning;
First heating: the first bed material through high temperature of mud powder surrounds and reheats near bed temperature, carries out first drying and forms one-level mud powder;
Continuous heating: the primary sludge powder is carried out continuous heating, so that the paper mill sludge in the primary sludge powder and coal dust decompose and produce a large amount of volatile matters;
Fully burning: begin coke and fully burn in Volatile, clean-burning temperature remains on more than 800 ℃, and fully the rear remaining waste residue of burning is used for the raw material of cement or brick.
Wherein, paper mill sludge is sent into pressure filter and is dewatered and specifically comprise the following steps in step (2):
Step (2.1): paper mill sludge at full speed is delivered to pressure filter by high-pressure pump;
Step (2.2): paper mill sludge under high-speed, the filter plate of Rapid Flow on described pressure filter, and be squeezed on the filter plate of pressure filter and form the sludge cake piece.
Wherein, described step (2.2) also comprises step 2.3 afterwards: paper mill sludge forms the sludge cake piece in described pressure filter after, drop to from the delivery port output of described pressure filter the process that step (3) is continued on ground, wherein, 6m is high at least apart from ground for the delivery port of described pressure filter.
Wherein, add Wingdale in circular fluid bed in the process of the first heating of step (4).
Wherein, also include the step of second dehydration between described step (2) and described step (3), be specially: be that 40%～55% paper mill sludge is sent into pressure filter again with the water ratio in step (2), the secondary press filtration by pressure filter is 45%～50% paper mill sludge to water ratio with dehydration of papermaking sludge.
beneficial effect of the present invention: the paper mill sludge after dehydration burns with the circular fluid bed of delivering to thermoelectric power station that acts as a fuel after coal mixes, utilized like this inorganics in the paper mill sludge, saved fire coal, bring certain economic benefit to enterprise, and owing to having added stablizer and flocculation agent in step (1), make the paper mill sludge waste residue after burning is had structural performance preferably, can be used for making cement and brick, so just realized taking full advantage of paper mill sludge organism and inorganics, accomplished in fact the minimizing that paper mill sludge is processed, stabilization and innoxious.
Description of drawings
The invention will be further described to utilize accompanying drawing, but the embodiment in accompanying drawing does not consist of any limitation of the invention, for those of ordinary skill in the art, under the prerequisite of not paying creative work, can also obtain according to the following drawings other accompanying drawing.
Fig. 1 is schematic flow sheet of the present invention.
Embodiment
The invention will be further described with the following Examples.
The embodiment of a kind of Resourceful treatment method of paper-making sludge of the present invention as shown in the schematic flow sheet of Fig. 1, comprises the following steps:
Step (1): precipitation is concentrated: paper mill sludge waste water is put into mud modified pond, and add the stablizer of 5～10mg/L and the flocculation agent of 1.5～3mg/L in mud modified pond, concentrated 1～2 hour of precipitation is 85～90% paper mill sludge until paper mill sludge waste water is isolated water ratio; Wherein, described stablizer is white lime, and described flocculation agent is polymerize aluminum chloride; And isolated water recoverable; The flocculation agent that is incorporated as polymerize aluminum chloride in this step produces throwing out to paper mill sludge, make dehydration of papermaking sludge, and be the stable rising in the modified pond that makes of the interpolation of the stablizer of white lime, can be to the paper mill sludge deodorization and sterilization, simultaneously, the rising of temperature can be accelerated separating of paper mill sludge and water, improves the dehydrating effect of paper mill sludge.
Step (2): primary dewatering: paper mill sludge in step (1) is sent into pressure filter, is 40%～55% paper mill sludge to water ratio with dehydration of papermaking sludge by pressure filter; And paper mill sludge is sent into pressure filter and is dewatered and specifically comprise the following steps in step (2):
Step (2.1): paper mill sludge at full speed is delivered to pressure filter by high-pressure pump;
Step (2.2): paper mill sludge under high-speed, the filter plate of Rapid Flow on described pressure filter, and be squeezed on the filter plate of pressure filter and form the sludge cake piece.。
Step (3): break up mixing: the paper mill sludge after step (2) dehydration is broken up and is uniformly mixed into the mud powder with coal dust, and wherein, the ratio of weight and number of paper mill sludge and coal dust is 1:10～15.
Step (4): burning utilizes: the mud powder in step (3) is sent into circular fluid bed, carry out first drying, continuous heating and three processes of fully burning;
First heating: the first bed material through high temperature of mud powder surrounds and reheats near bed temperature, carries out first drying and forms one-level mud powder;
Continuous heating: the primary sludge powder is carried out continuous heating, so that the paper mill sludge in the primary sludge powder and coal dust decompose and produce a large amount of volatile matters;
Fully burning: begin coke and fully burn in Volatile, clean-burning temperature remains on more than 800 ℃, and fully the rear remaining waste residue of burning is used for the raw material of cement or brick.
concrete, described step (2.2) also comprises step 2.3 afterwards: paper mill sludge forms the sludge cake piece in described pressure filter after, drop to from the delivery port output of described pressure filter the process that step (3) is continued on ground, wherein, 6m is high at least apart from ground for the delivery port of described pressure filter, paper mill sludge becomes the sludge cake piece delivery port of laying equal stress on and drops to ground after completing steps (2), by breaing up dewatered sludge in the gravity performing step (3) of sludge cake piece self, and do not need to adopt the special equipment of breaing up or device, extremely convenient and efficient, effectively saved cost for enterprise.
Concrete, add Wingdale in circular fluid bed in the process of the first heating of step (4).
the even mixed mud powder of paper mill sludge after dehydration and the coal dust circular fluid bed of delivering to thermoelectric power station that acts as a fuel burns, utilized like this inorganics in the paper mill sludge, saved fire coal, bring certain economic benefit to enterprise, and owing to having added stablizer and flocculation agent in step (1), make and paper mill sludge waste residue after burning has structural performance preferably, can make the raw material of cement or brick, so just realized taking full advantage of paper mill sludge organism and inorganics, accomplished in fact the minimizing that paper mill sludge is processed, stabilization and innoxious.
Paper mill sludge in the scale circular fluid bed with coal mixed firing, its benefit: 1, after the paper mill sludge mummification in the circulating fluidized bed internal combustion, burn highly stable, operation is very simple; 2, Pollutant emission concentration is less than the prescribed value in national Air–pollution From Combustion control criterion; 3, paper mill sludge increases Wingdale in order to desulfurization in circular fluid bed, make sulfur dioxide removal efficient high, can save smoke evacuation afterbody desulfurizer, adopt the cloth bag division to get final product, be conducive to the processing to flying dust after the paper mill sludge burning, guarantee minimizing, stabilization and innoxious that paper mill sludge is processed; 4, the mixed firing of paper mill sludge and coal dust can suppress the generation of Dioxins.
Affecting paper mill sludge produces Dioxins in combustion processes factor comprises: the composition of paper mill sludge and characteristic, the condition of burning, the composition of flue gas, the quantity of particle, the temperature of flue gas, the control method of particulate emission equipment and sour gas, and when temperature of combustion reaches more than 800 ℃, also can suppress the generation of Dioxins, further, reduce the generation of Dioxins.
In this concrete enforcement, also include the step of second dehydration between described step (2) and described step (3), be specially: be that 40%～55% paper mill sludge is sent into pressure filter again with the water ratio in step (2), secondary press filtration by pressure filter is 45%～50% paper mill sludge to water ratio with dehydration of papermaking sludge, dehydration can improve the effect of breaing up of ground sludge cake piece in step (3) further, simultaneously, also can make the middle mud powder of step (4) that good combustion efficacy is arranged.
Should be noted that at last; above embodiment is only in order to illustrate technical scheme of the present invention; but not limiting the scope of the invention; although with reference to preferred embodiment, the present invention has been done to explain; those of ordinary skill in the art is to be understood that; can modify or be equal to replacement technical scheme of the present invention, and not break away from essence and the scope of technical solution of the present invention.
Claims (5)
1. Resourceful treatment method of paper-making sludge comprises the following steps:
Step (1): precipitation is concentrated: paper mill sludge waste water is put into mud modified pond, and add the stablizer of 5～10mg/L and the flocculation agent of 1.5～3mg/L in mud modified pond, concentrated 1～2 hour of precipitation is 85～90% paper mill sludge until paper mill sludge waste water is isolated water ratio; Wherein, described stablizer is white lime, and described flocculation agent is polymerize aluminum chloride;
Step (2): primary dewatering: paper mill sludge in step (1) is sent into pressure filter, is 40%～55% paper mill sludge to water ratio with dehydration of papermaking sludge by pressure filter;
Step (3): break up mixing: the paper mill sludge after step (2) dehydration is broken up and is uniformly mixed into the mud powder with coal dust, and wherein, the ratio of weight and number of paper mill sludge and coal dust is 1:10～15;
Step (4): burning utilizes: the mud powder in step (3) is sent into circular fluid bed, carry out first drying, continuous heating and three processes of fully burning;
First heating: the first bed material through high temperature of mud powder surrounds and reheats near bed temperature, carries out first drying and forms one-level mud powder;
Continuous heating: the primary sludge powder is carried out continuous heating, so that the paper mill sludge in the primary sludge powder and coal dust decompose and produce a large amount of volatile matters;
Fully burning: begin coke and fully burn in Volatile, clean-burning temperature remains on more than 800 ℃, and fully the rear remaining waste residue of burning is used for the raw material of cement or brick.
2. a kind of Resourceful treatment method of paper-making sludge according to claim 1 is characterized in that: paper mill sludge is sent into pressure filter and is dewatered and specifically comprise the following steps in step (2):
Step (2.1): paper mill sludge at full speed is delivered to pressure filter by high-pressure pump;
Step (2.2): paper mill sludge under high-speed, the filter plate of Rapid Flow on described pressure filter, and be squeezed on the filter plate of pressure filter and form the sludge cake piece.
3. a kind of Resourceful treatment method of paper-making sludge according to claim 2, it is characterized in that: described step (2.2) also comprises step 2.3 afterwards: paper mill sludge forms the sludge cake piece in described pressure filter after, drop to from the delivery port output of described pressure filter the process that step (3) is continued on ground, wherein, 6m is high at least apart from ground for the delivery port of described pressure filter.
4. a kind of Resourceful treatment method of paper-making sludge according to claim 1, is characterized in that: add Wingdale in circular fluid bed in the process of the first heating of step (4).
5. a kind of Resourceful treatment method of paper-making sludge according to claim 1, it is characterized in that: the step that also includes second dehydration between described step (2) and described step (3), be specially: be that 40%～55% paper mill sludge is sent into pressure filter again with the water ratio in step (2), the secondary press filtration by pressure filter is 45%～50% paper mill sludge to water ratio with dehydration of papermaking sludge.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104556621A (en) * | 2015-01-16 | 2015-04-29 | 光大环保技术研究院（深圳）有限公司 | Sludge treatment method |
| CN105716088A (en) * | 2016-04-19 | 2016-06-29 | 周伟初 | Squeezing and extruding treatment method for soaked materials |
| CN106045270A (en) * | 2016-05-22 | 2016-10-26 | 中国轻工业长沙工程有限公司 | Mixing and drying process for sludge and waste residue of wastepaper pulping and papermaking mill |
| CN106348567A (en) * | 2016-08-31 | 2017-01-25 | 河南永威安防股份有限公司 | Comprehensive treatment process for paper-making sludge and biomass waste |
| CN107473564A (en) * | 2017-09-26 | 2017-12-15 | 重庆盎瑞悦科技有限公司 | The method for innocent treatment and system of a kind of domestic sludge |
| CN107601795A (en) * | 2017-10-29 | 2018-01-19 | 重庆盎瑞悦科技有限公司 | A kind of method and system using garden waste harmless treatment domestic sludge |
| CN110482825A (en) * | 2019-08-29 | 2019-11-22 | 万黛 | A kind of resource utilization method and paper mill production system of paper mill paper mill sludge |
| CN113402151A (en) * | 2021-05-26 | 2021-09-17 | 江苏安可捷环保科技有限公司 | Efficient treatment process for municipal domestic sludge |
| CN113651521A (en) * | 2021-07-21 | 2021-11-16 | 中交第二公路勘察设计研究院有限公司 | Artificial freeze-thaw sludge dewatering and coal blending incineration treatment method |
| CN114230122A (en) * | 2021-12-15 | 2022-03-25 | 山东尚科环境工程有限公司 | High-temperature and low-temperature drying comprehensive treatment method for papermaking sludge |
| CN114716127A (en) * | 2022-02-21 | 2022-07-08 | 江苏理文造纸有限公司 | Solid biological treatment equipment of using is carried to mud |
| CN114804538A (en) * | 2022-05-19 | 2022-07-29 | 山东合创新材料有限公司 | Sludge recycling process of primary sedimentation tank for manufacturing bobbin paper |
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Cited By (14)
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| CN104556621A (en) * | 2015-01-16 | 2015-04-29 | 光大环保技术研究院（深圳）有限公司 | Sludge treatment method |
| CN105716088A (en) * | 2016-04-19 | 2016-06-29 | 周伟初 | Squeezing and extruding treatment method for soaked materials |
| CN105716088B (en) * | 2016-04-19 | 2017-10-20 | 周伟初 | A kind of squeezing extrusion process method for soaking material |
| CN106045270A (en) * | 2016-05-22 | 2016-10-26 | 中国轻工业长沙工程有限公司 | Mixing and drying process for sludge and waste residue of wastepaper pulping and papermaking mill |
| CN106348567A (en) * | 2016-08-31 | 2017-01-25 | 河南永威安防股份有限公司 | Comprehensive treatment process for paper-making sludge and biomass waste |
| CN107473564B (en) * | 2017-09-26 | 2023-08-29 | 重庆盎瑞悦科技有限公司 | Harmless treatment method and system for domestic sludge |
| CN107473564A (en) * | 2017-09-26 | 2017-12-15 | 重庆盎瑞悦科技有限公司 | The method for innocent treatment and system of a kind of domestic sludge |
| CN107601795A (en) * | 2017-10-29 | 2018-01-19 | 重庆盎瑞悦科技有限公司 | A kind of method and system using garden waste harmless treatment domestic sludge |
| CN110482825A (en) * | 2019-08-29 | 2019-11-22 | 万黛 | A kind of resource utilization method and paper mill production system of paper mill paper mill sludge |
| CN113402151A (en) * | 2021-05-26 | 2021-09-17 | 江苏安可捷环保科技有限公司 | Efficient treatment process for municipal domestic sludge |
| CN113651521A (en) * | 2021-07-21 | 2021-11-16 | 中交第二公路勘察设计研究院有限公司 | Artificial freeze-thaw sludge dewatering and coal blending incineration treatment method |
| CN114230122A (en) * | 2021-12-15 | 2022-03-25 | 山东尚科环境工程有限公司 | High-temperature and low-temperature drying comprehensive treatment method for papermaking sludge |
| CN114716127A (en) * | 2022-02-21 | 2022-07-08 | 江苏理文造纸有限公司 | Solid biological treatment equipment of using is carried to mud |
| CN114804538A (en) * | 2022-05-19 | 2022-07-29 | 山东合创新材料有限公司 | Sludge recycling process of primary sedimentation tank for manufacturing bobbin paper |
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