CN111087142A - Recovery process for papermaking sludge - Google Patents
Recovery process for papermaking sludge Download PDFInfo
- Publication number
- CN111087142A CN111087142A CN201911146202.6A CN201911146202A CN111087142A CN 111087142 A CN111087142 A CN 111087142A CN 201911146202 A CN201911146202 A CN 201911146202A CN 111087142 A CN111087142 A CN 111087142A
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- CN
- China
- Prior art keywords
- sludge
- paper
- water body
- product
- recycling process
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Classifications
-
- 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
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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
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/01—Waste products, e.g. sludge
-
- 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
- C02F2103/26—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof
- C02F2103/28—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof from the paper or cellulose industry
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Sludge (AREA)
- Paper (AREA)
Abstract
The invention discloses a recovery process for papermaking sludge, which is applied to the field of papermaking and solves the technical problem of environmental pollution caused by sludge wastewater generated in the existing papermaking process, and the technical scheme is characterized by comprising the following steps of S1: standing and precipitating, namely placing sludge generated in the production process in a precipitation tank part to realize the primary layering of the water body and the precipitated sludge; s2: water body treatment, namely performing suction operation on the upper water body generated in the step S1, and performing water body detection; s3: modifying sludge, namely adding a modifying substance into the precipitated sludge; s4; recycling, detecting the product S3, and adding the product into paper pulp according to a certain proportion to mix and make paper; s5: the paper product detection has the technical effects of effectively recycling the paper-making sludge and reducing pollution.
Description
Technical Field
The invention relates to the field of papermaking, in particular to a recovery process for papermaking sludge.
Background
For a long time, the paper making industry is always a high-pollution production mode, and the produced production waste generally brings great harm to the environment.
Because a large amount of additional chemical reagents are needed to optimize and improve paper products in the papermaking process, only a small part of the chemical positions are fully absorbed and utilized finally, most other substances are required to be discharged along with discharged waste water and waste materials, and although the waste materials are transferred to brick factories and the like to be sintered into bricks at present, the pollution can not be eradicated, the burden of enterprises is increased, and a large amount of recyclable resources are wasted.
Disclosure of Invention
The invention aims to provide a recovery process for papermaking sludge, which has the advantages of realizing the recovery and reutilization of the papermaking sludge and reducing the environmental pollution.
The technical purpose of the invention is realized by the following technical scheme: a recovery process for papermaking sludge is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
s1: standing and precipitating, namely placing sludge generated in the production process in a precipitation tank part to realize the primary layering of the water body and the precipitated sludge;
s2: water body treatment, namely performing suction operation on the upper water body generated in the step S1, and performing water body detection;
s3: modifying sludge, namely adding a modifying substance into the precipitated sludge in proportion;
s4; recycling, detecting the product S3, and adding the product into paper pulp according to a certain proportion to mix and make paper;
s5: detecting a paper product;
preferably, the standing and precipitating time in the S1 is 20-30 h.
Preferably, the water body detection parameters extracted in S2 include ph and heavy metal degree.
Preferably, the modifying substance in S3 is a cationic modified starch.
Preferably, the S3 is added according to the mass fraction ratio of the modified substance to the precipitated sludge of 20-40%.
Preferably, the main parameters of product detection in S4 are acidity-basicity and odor.
Preferably, the sludge in the S4 and the pulp to be mixed are mixed into the pulp in a mass ratio of 1: 20-1: 30.
Preferably, the paper quality detection includes a paper uniformity parameter.
In conclusion, the invention has the following beneficial effects:
1. the separation of the main treatment components of the sludge is realized through the preliminary separation of water and sludge in the sludge, the neutralization effect of the acidic quality of the sludge is realized by utilizing the mixing of the modified substances, so that the sludge modification is kept in a relatively stable state, the subsequent recycling is convenient, and the environmental pollution possibly brought by the acidic quality is reduced.
Detailed Description
The present invention will be described in further detail below.
The first embodiment is as follows:
a recovery process for papermaking sludge comprises the following procedures,
s1: standing and precipitating, namely placing sludge generated in the production process in a precipitation tank part to realize the primary layering of a water body and precipitated sludge, wherein the standing and precipitating time is 20 hours;
s2: water body treatment, wherein the upper water body generated in S1 is sucked out and is subjected to water body detection, and the measured pH value is 6.8 and the heavy metal degree is 0.02 mg/L;
s3: modifying sludge, namely adding cation modified starch into the precipitated sludge, wherein the mass fraction ratio of the cation modified starch to the precipitated sludge is 20%;
s4; recycling, detecting an S3 product, detecting that the pH value is 7, and adding the product into paper pulp according to the mass fraction of 1: 20 of sludge and the paper pulp to be mixed for mixed papermaking, wherein the pH value is no peculiar smell;
s5: and (5) detecting the paper, wherein the uniformity parameter of the paper is uniform.
Example two:
a recovery process for papermaking sludge comprises the following procedures,
s1: standing and precipitating, namely placing sludge generated in the production process in a precipitation tank part to realize the primary layering of a water body and precipitated sludge, wherein the standing and precipitating time is 25 hours;
s2: water body treatment, wherein the upper water body generated in S1 is sucked out and is subjected to water body detection, and the measured pH value is 7 and the heavy metal degree is 0.005 mg/L;
s3: modifying sludge, namely adding cation modified starch into the precipitated sludge, wherein the mass fraction ratio of the cation modified starch to the precipitated sludge is 30%;
s4; recycling, detecting an S3 product, detecting that the pH value is 7.1, and adding the product into paper pulp according to the mass fraction of 1: 24 of sludge and the paper pulp to be mixed for mixed papermaking, wherein the pH value is no peculiar smell;
s5: and the paper uniformity parameter is better in paper product detection.
Example three:
a recovery process for papermaking sludge comprises the following procedures,
s1: standing and precipitating, namely placing sludge generated in the production process in a precipitation tank part to realize the primary layering of a water body and precipitated sludge, wherein the standing and precipitating time is 30 hours;
s2: water body treatment, wherein the upper water body generated in S1 is sucked out and is subjected to water body detection, and the measured pH value is 6.9 and the heavy metal degree is 0.04 mg/L;
s3: modifying sludge, namely adding cation modified starch into the precipitated sludge, wherein the mass fraction ratio of the cation modified starch to the precipitated sludge is 40%;
s4; recycling, detecting an S3 product, detecting that the pH value is 7.5, and adding the product into paper pulp according to the mass fraction of 1: 30 of sludge and the paper pulp to be mixed for mixed papermaking, wherein the pH value is no peculiar smell;
s5: and the uniformity parameter of the paper is relatively uniform in paper product detection.
Comparative example:
a recovery process for papermaking sludge comprises the following procedures,
s1: standing and precipitating, namely placing sludge generated in the production process in a precipitation tank part to realize the primary layering of a water body and precipitated sludge, wherein the standing and precipitating time is 30 hours;
s2: water body treatment, namely performing suction operation on the upper water body generated in the step S1;
s3: recovering sludge, namely separately isolating the precipitated sludge, mixing the sludge with the pulp raw material and stirring the mixture;
s4: and (5) detecting the paper, wherein the uniformity parameter of the paper is rough.
Specific analysis is carried out on the paper making processing technology products in the first embodiment, the second embodiment, the third embodiment and the comparative example, and the recovery technology disclosed by the invention can effectively realize the stable utilization of the recycled sludge, so that the sludge can be effectively mixed into the paper pulp raw material, and the guarantee of the final paper product is met; compared with the processing technology in the comparative example, the untreated sludge is directly mixed into the paper pulp, which not only directly affects the paper product, but also causes the phenomena of paper odor and pulp blocking.
| Example one | Example two | EXAMPLE III | Comparative example | |
| Standing for separation | 20h | 25h | 30h | 30h |
| Water ph value | 6.8 | 7 | 6.9 | / |
| Degree of heavy metal | 0.02mg/L | 0.005mg/L | 0.04mg/L | / |
| Modified starch | Is provided with | Is provided with | Is provided with | Is free of |
| pH value of sludge | 7 | 7.1 | 7.5 | / |
| Sludge smell | Has no peculiar smell | Has no peculiar smell | Has no peculiar smell | Acid odor |
| Mass fraction ratio | 20％ | 30％ | 40％ | / |
| Uniformity of paper | Uniformity | Is preferably used | Uniformity | Difference (D) |
The actual parameters can further show that the sludge processed by the recovery process disclosed by the invention can be stably mixed with the paper pulp after being processed, and the sludge and the paper pulp can realize good paper product guarantee.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (8)
1. A recovery process for papermaking sludge is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
s1: standing and precipitating, namely placing sludge generated in the production process in a precipitation tank part to realize the primary layering of the water body and the precipitated sludge;
s2: water body treatment, namely performing suction operation on the upper water body generated in the step S1, and performing water body detection;
s3: modifying sludge, namely adding a modifying substance into the precipitated sludge in proportion;
s4; recycling, detecting the product S3, and adding the product into paper pulp according to a certain proportion to mix and make paper;
s5: and (6) detecting the paper product.
2. The recycling process for paper sludge according to claim 1, which is characterized in that: and standing and precipitating for 20-30h in the S1.
3. The recycling process for paper sludge according to claim 1, which is characterized in that: and the water body detection parameters sucked out in the step S2 comprise a ph value and a heavy metal degree.
4. The recycling process for paper sludge according to claim 1, which is characterized in that: the modified substance in S3 is cationic modified starch.
5. The recycling process for paper sludge according to claim 1, which is characterized in that: the S3 is added according to the mass fraction ratio of the modified substance to the precipitated sludge of 20-40%.
6. The recycling process for paper sludge according to claim 1, which is characterized in that: the main parameters of the product detection in the S4 are acidity and alkalinity and odor.
7. The recycling process for paper sludge according to claim 1, which is characterized in that: and mixing the sludge in the S4 and the paper pulp to be mixed into the paper pulp according to the mass fraction of 1: 20-1: 30.
8. The recycling process for paper sludge according to claim 1, which is characterized in that: the paper quality detection comprises a paper uniformity parameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911146202.6A CN111087142A (en) | 2019-11-13 | 2019-11-13 | Recovery process for papermaking sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911146202.6A CN111087142A (en) | 2019-11-13 | 2019-11-13 | Recovery process for papermaking sludge |
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| Publication Number | Publication Date |
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| CN111087142A true CN111087142A (en) | 2020-05-01 |
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| CN201911146202.6A Pending CN111087142A (en) | 2019-11-13 | 2019-11-13 | Recovery process for papermaking sludge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2019
- 2019-11-13 CN CN201911146202.6A patent/CN111087142A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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Application publication date: 20200501 |