CN111018235A - Process for improving papermaking sewage treatment efficiency - Google Patents
Process for improving papermaking sewage treatment efficiency Download PDFInfo
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- CN111018235A CN111018235A CN201911147862.6A CN201911147862A CN111018235A CN 111018235 A CN111018235 A CN 111018235A CN 201911147862 A CN201911147862 A CN 201911147862A CN 111018235 A CN111018235 A CN 111018235A
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- scale inhibition
- papermaking
- anaerobic tower
- anaerobic
- sewage treatment
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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
- 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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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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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
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/14—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Paper (AREA)
Abstract
The invention belongs to the technical field of waste water treatment, and particularly relates to a process for improving the treatment efficiency of papermaking waste water. The scale inhibition regulator is added in front of the anaerobic tower of the conventional papermaking sewage treatment process, and after the papermaking sewage treatment process is improved by using the scale inhibition regulator, the flow rate of the sewage entering the anaerobic tower is increased by 43m3More than h; the water body of the aeration tank of the papermaking sewage treatment system is uniformly stirred, and the blockage phenomenon of an aeration head is obviously reduced; can reduce the interception of calcium and magnesium ions in the pipeline, reduce the phenomenon of pipeline blockage, improve the throughput of each process section of papermaking sewage, enhance the sewage treatment capacity and reduce the operation cost.
Description
Technical Field
The invention belongs to the technical field of waste water treatment, and particularly relates to a process for improving the treatment efficiency of papermaking waste water.
Background
Under the guidance of the policy of encouraging the upgrading of consumption in China, the demands of people on cultural paper, household paper and the like are rapidly increased, and the return of the paper industry is the main basic call. With the continuous development of the paper making industry, the sewage discharge amount of a paper mill is continuously increased, the COD concentration is high, and the biodegradability is poor. The papermaking process comprises the working procedures of pulping, washing, bleaching, papermaking and the like. Because the prior basic pulping process is mostly adopted, the produced paper-making sewage (waste water) contains a large amount of Ca2+、Mg2+When entering the anaerobic tower for anaerobic treatment, the carbon dioxide is easy to react with CO in the anaerobic tower3 2-Combined to form CaCO3And MgCO3Precipitation, which causes the scaling and blockage of the pipeline of the effluent of the anaerobic tower during the transportation process, even CaCO3And MgCO3The sediment can wrap the anaerobic bacteria to lead the anaerobic bacteria to lose activity in advance, seriously influences the sewage treatment efficiency and improves the cost. The traditional biochemical method for treating the papermaking wastewater has the disadvantages of high investment, high operation cost and low removal rate, and the problems of scaling and blockage of the pipeline of the papermaking wastewater treatment system cannot be solved. Therefore, a new technical solution is needed to solve the above problems.
Disclosure of Invention
In view of the above technical problems in the prior art, there is a need to provide a process for improving the efficiency of papermaking wastewater treatment, which aims to reduce the percentage of calcium and magnesium ions contained in the inlet water of an anaerobic tower that are precipitated and retained in the papermaking wastewater treatment process, thereby reducing the scaling and blockage of pipelines caused by the generation of calcium carbonate and magnesium carbonate in the outlet water of the anaerobic tower in the subsequent wastewater treatment conveying process; meanwhile, the calcification inactivation of anaerobic bacteria can be prevented, and the anaerobic treatment effect is effectively improved.
In order to achieve the aim, the inventor provides a process for improving the treatment efficiency of papermaking sewage, which comprises the step of adding a scale inhibition regulator to the inlet of an anaerobic tower, wherein the addition amount of the scale inhibition regulator is 8-10 ppm.
Further, the scale inhibition regulator consists of 15-55 wt% of organic phosphonic acid, 6-18 wt% of sodium polyacrylate, 15-25 wt% of sodium dodecyl benzene sulfonate, 9-16 wt% of polyaspartic acid and the balance of water.
The organic phosphonic acid is selected from more than one of hydroxyethylidene diphosphonic acid, amino trimethylene phosphonic acid, diethylenetriamine pentamethylene phosphonic acid and ethylenediamine tetramethylene phosphonic acid.
The preferable process of the invention also comprises the step of measuring and adjusting the temperature of the papermaking sewage at 28-30 ℃ before adding the scale inhibition regulator to the inlet of the anaerobic tower.
The preferable process of the invention also comprises the step of measuring and adjusting the pH value of the papermaking sewage to 5-6.5 before adding the scale inhibition regulator to the inlet of the anaerobic tower.
Different from the prior art, the technical scheme at least has the following beneficial effects:
1. after the scale inhibition regulator is used for improving the papermaking sewage treatment process, the flow rate of the sewage entering the anaerobic tower is increased by 43m3More than h;
2. the water body of the aeration tank of the papermaking sewage treatment system is uniformly stirred, and the blockage phenomenon of an aeration head is obviously reduced;
3. and observing the running condition, and avoiding the phenomenon that the blockage of the aeration head is increased.
Therefore, the technical scheme provided by the invention can reduce the interception of calcium and magnesium ions in the pipeline, reduce the phenomenon of pipeline blockage, improve the throughput of each process section of papermaking sewage, enhance the sewage treatment capacity and reduce the operation cost.
Detailed Description
The process for improving the efficiency of treating paper-making wastewater according to the present invention will be described in detail below.
A process for improving the treatment efficiency of papermaking sewage comprises the step of adding a scale inhibition regulator to an inlet of an anaerobic tower, wherein the addition amount of the scale inhibition regulator is 8-10 ppm.
Generally, the treatment process of the papermaking wastewater in the invention is the same as the conventional papermaking wastewater treatment process, and basically comprises the following steps: the papermaking wastewater effluent-adjusting tank A-filtering tank-sedimentation tank-adjusting tank B-anaerobic tower-SBR biochemical tank-biochemical tank. The method is characterized in that a scale inhibition regulator is added in front of the anaerobic tower, a sampling valve is additionally arranged on an inlet pipeline and an outlet pipeline of the anaerobic tower, and the flow calibration is carried out on the addition of the scale inhibition regulator.
In order to facilitate detection analysis and comparison, the scale inhibition regulator is added to the inlet of the anaerobic tower, and in order to adapt to the technical scheme provided by the invention and facilitate sampling, a sampling valve is additionally arranged on the original pipeline, and water samples entering and exiting the anaerobic tower are taken for data detection. And when the scale inhibition regulator is added, a flow meter control panel is arranged to calibrate and control the flow of the scale inhibition regulator.
Further, the scale inhibition regulator consists of 15-55 wt% of organic phosphonic acid, 6-18 wt% of sodium polyacrylate, 15-25 wt% of sodium dodecyl benzene sulfonate, 9-16 wt% of polyaspartic acid and the balance of water.
The organic phosphonic acid scale and corrosion inhibitor has low concentration scale inhibiting effect, can perform complex reaction with iron, copper, zinc and other metals to form stable complex with metal ions, can dissolve oxides on the metal surface, and is commonly used as scale and corrosion inhibitor and electroplating complexing agent for boiler water, circulating water and oil field water injection.
Sodium polyacrylate is a surfactant with various special properties, is a solution when the amount of divalent metal ions is small, and is one of the raw materials of retention and drainage aids commonly used in the papermaking process.
Sodium dodecyl benzene sulfonate is a common anionic surfactant, has low biodegradation rate, and is mainly used for spinning, metal plating, deinking and the like.
The polyaspartic acid is an amino acid polymer, is easy to biodegrade, is used as a scale inhibitor, and is particularly suitable for inhibiting calcium carbonate scale and calcium sulfate scale in cooling water, boiler water and reverse osmosis treatment.
In exemplary embodiments, the organophosphonic acid is selected from one or more of hydroxyethylidene diphosphonic acid, aminotrimethylidene phosphonic acid, diethylenetriamine pentamethylene phosphonic acid, and ethylenediamine tetramethylene phosphonic acid.
In an exemplary embodiment of the present invention, the preferred process further comprises the step of measuring and adjusting the temperature of the papermaking wastewater to 28-30 ℃ before adding the scale inhibition regulator to the inlet of the anaerobic tower.
In an exemplary embodiment of the present invention, the preferred process further comprises the step of measuring and adjusting the pH of the papermaking wastewater to 5-6.5 before adding the scale inhibitor into the inlet of the anaerobic tower.
The measurement of calcium and magnesium ions, the measurement of pH value and the like in the invention are conventional methods.
In order to explain technical contents, structural features, and objects and effects of the technical means in detail, the following detailed description is given with reference to specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present application.
Example 1
Anaerobic tower inlet and outlet water for treating papermaking sewage without adding scale inhibitor regulator
The conventional papermaking sewage treatment process is adopted, namely papermaking wastewater effluent, a regulating tank A, a filtering tank, a sedimentation tank, a regulating tank B, an anaerobic tower, an SBR biochemical tank and a biochemical tank are adopted, wherein the anaerobic towers are connected in parallel, and a scale inhibition regulator is not added in front of the two anaerobic towers. The calcium ion content of inlet water of the No. 1 and No. 2 anaerobic towers is 465mg/l, the magnesium ion content is 247mg/l, the calcium ion content of outlet water of the No. 1 anaerobic tower is 355mg/l, the magnesium ion content is 203mg/l, and the rejection rate of calcium ions and the rejection rate of magnesium ions in the No. 1 anaerobic tower are calculated to be 23.66% and 17.81% respectively; the calcium ion content of the effluent of the No. 2 anaerobic tower is 385mg/l, the magnesium ion content is 212mg/l, the calcium ion rejection rate in the No. 2 anaerobic tower is 17.20%, and the magnesium ion rejection rate is 14.17%, so that a large amount of calcium ions and magnesium ions are intercepted in the anaerobic tower without adding the scale inhibition regulator.
Example 2
The invention relates to a papermaking sewage treatment process by adding a scale inhibition regulator and the water inlet and outlet conditions of an anaerobic tower thereof
On the basis of the papermaking sewage treatment process in the embodiment 1, a scale inhibition regulator is added into a front inlet pipeline of the double anaerobic tower, the addition amount of the scale inhibition regulator is 8ppm, the scale inhibition regulator consists of 15% of organic phosphonic acid (a mixture of amino trimethylene phosphonic acid and diethylene triamine pentamethylene phosphonic acid in a mass ratio of 1: 1), 10% of sodium polyacrylate, 15% of sodium dodecyl benzene sulfonate, 12% of polyaspartic acid and the balance of water, and the added scale inhibition regulator is addedAnd (3) measuring before the scale regulator, regulating the temperature of the papermaking wastewater to 30 ℃ by using cooling water, and regulating the pH value of the papermaking wastewater to 5 by using dilute hydrochloric acid. According to the determination, the calcium ion content of inlet water of the No. 1 and No. 2 anaerobic towers is 560mg/l, the magnesium ion content is 286mg/l, the calcium ion content of outlet water of the No. 1 anaerobic tower is 540mg/l, the magnesium ion content is 279mg/l, the rejection rate of calcium ions in the anaerobic towers is 3.57%, and the rejection rate of magnesium ions is 2.45%; the calcium ion content of the effluent of the No. 2 anaerobic tower is 530mg/l, the magnesium ion content is 272mg/l, the rejection rate of calcium ions in the anaerobic tower is 5.36 percent, the rejection rate of magnesium ions in the anaerobic tower is 4.90 percent, and the rejection rate of calcium ions and magnesium ions is obviously reduced. After the scale inhibition regulator is used for improving the papermaking sewage treatment process, the flow rate of the sewage entering the anaerobic tower is increased by 46m3/h。
Example 3
The invention relates to a papermaking sewage treatment process by adding a scale inhibition regulator and the water inlet and outlet conditions of an anaerobic tower thereof
On the basis of the papermaking sewage treatment process in the embodiment 1, a scale inhibition regulator is added into a front inlet pipeline of a double anaerobic tower, the addition amount of the scale inhibition regulator is 10ppm, the scale inhibition regulator consists of 20% of organic phosphonic acid (a mixture of amino trimethylene phosphonic acid, hydroxyethylidene diphosphonic acid and ethylene diamine tetramethylene phosphonic acid in a mass ratio of 2:4: 4), 8% of sodium polyacrylate, 23% of sodium dodecyl benzene sulfonate, 9% of polyaspartic acid and the balance of water, the temperature of the papermaking sewage is measured and adjusted to 28 ℃ by cooling water before the scale inhibition regulator is added, and the pH value of the papermaking sewage is measured and adjusted to 6 by dilute hydrochloric acid. Through determination, the calcium ion content of inlet water of the No. 1 and No. 2 anaerobic towers is 475mg/l, the magnesium ion content is 238mg/l, the calcium ion content of outlet water of the No. 1 anaerobic tower is 465mg/l, the magnesium ion content is 231mg/l, the rejection rate of calcium ions in the anaerobic towers is 2.10%, and the rejection rate of magnesium ions is 2.94%; the calcium ion content of the effluent of the No. 2 anaerobic tower is 460mg/l, the magnesium ion content is 229mg/l, the rejection rate of calcium ions in the anaerobic tower is 3.16%, the rejection rate of magnesium ions in the anaerobic tower is 3.78%, and the rejection rate of calcium ions and magnesium ions is obviously reduced. After the scale inhibition regulator is used for improving the papermaking sewage treatment process, the flow rate of the sewage entering the anaerobic tower is increased by 43m 3/h.
Example 4
The invention relates to a papermaking sewage treatment process by adding a scale inhibition regulator and the water inlet and outlet conditions of an anaerobic tower thereof
On the basis of the papermaking sewage treatment process in the embodiment 1, a scale inhibition regulator is added into a front inlet pipeline of the double anaerobic tower, the addition amount of the scale inhibition regulator is 9ppm, the scale inhibition regulator consists of 54% of organic phosphonic acid (a mixture of diethylenetriamine pentamethylene phosphonic acid and ethylenediamine tetramethylene phosphonic acid in a mass ratio of 3: 7), 18% of sodium polyacrylate, 24.8% of sodium dodecyl benzene sulfonate, 16% of polyaspartic acid and the balance of water, the temperature of the papermaking sewage is regulated to 30 ℃ by using cooling water before the scale inhibition regulator is added, and the pH value of the papermaking sewage is regulated to 6.5 by using dilute hydrochloric acid. According to the determination, the calcium ion content of inlet water of the No. 1 and No. 2 anaerobic towers is 453mg/l, the magnesium ion content is 296mg/l, the calcium ion content of outlet water of the No. 1 anaerobic tower is 445mg/l, the magnesium ion content is 287mg/l, the rejection rate of calcium ions in the anaerobic towers is 1.77%, and the rejection rate of magnesium ions is 3.04%; the calcium ion content of the effluent of the No. 2 anaerobic tower is 440mg/l, the magnesium ion content is 285mg/l, the rejection rate of calcium ions in the anaerobic tower is 2.87%, the rejection rate of magnesium ions in the anaerobic tower is 3.72%, and the rejection rate of calcium ions and magnesium ions is obviously reduced. After the scale inhibition regulator is used for improving the papermaking sewage treatment process, the flow rate of the sewage entering the anaerobic tower is increased by 46m 3/h.
It should be noted that, although the above embodiments have been described herein, the invention is not limited thereto. Therefore, based on the innovative concepts of the present invention, the technical solutions of the present invention can be directly or indirectly applied to other related technical fields by making changes and modifications to the embodiments described herein or by using equivalent structures or equivalent processes performed in the present specification, and are included in the scope of the present invention.
Claims (5)
1. A process for improving the treatment efficiency of papermaking sewage is characterized by comprising the step of adding a scale inhibition regulator to an inlet of an anaerobic tower, wherein the addition amount of the scale inhibition regulator is 8-10 ppm.
2. The process of claim 1, wherein the scale inhibition and adjustment agent comprises 15-55 wt% of organic phosphonic acid, 6-18 wt% of sodium polyacrylate, 15-25 wt% of sodium dodecyl benzene sulfonate, 9-16 wt% of polyaspartic acid and the balance of water.
3. The process of claim 2, wherein the organophosphonic acid is selected from one or more of hydroxyethylidene diphosphonic acid, aminotrimethylidene phosphonic acid, diethylenetriamine pentamethylene phosphonic acid, and ethylenediamine tetramethylene phosphonic acid.
4. The process as claimed in claim 1, further comprising the step of measuring and adjusting the temperature of the papermaking wastewater to 28-30 ℃ before adding the scale inhibition regulator to the inlet of the anaerobic tower.
5. The process as claimed in claim 1, further comprising the step of measuring and adjusting the pH value of the papermaking wastewater to 5-6.5 before adding the scale inhibition adjusting agent to the inlet of the anaerobic tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911147862.6A CN111018235A (en) | 2019-11-21 | 2019-11-21 | Process for improving papermaking sewage treatment efficiency |
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| CN201911147862.6A CN111018235A (en) | 2019-11-21 | 2019-11-21 | Process for improving papermaking sewage treatment efficiency |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116377751A (en) * | 2022-11-25 | 2023-07-04 | 上海昶法新材料有限公司 | Preparation method of pulping auxiliary |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000212888A (en) * | 1998-12-08 | 2000-08-02 | Korea Res Inst Of Chem Technol | Regulation of calcium concentration in reused process water for papermaking |
| CN108726803A (en) * | 2018-06-12 | 2018-11-02 | 浙江荣晟环保纸业股份有限公司 | A kind of paper waste control calcium technique for anaerobic tower |
-
2019
- 2019-11-21 CN CN201911147862.6A patent/CN111018235A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000212888A (en) * | 1998-12-08 | 2000-08-02 | Korea Res Inst Of Chem Technol | Regulation of calcium concentration in reused process water for papermaking |
| CN108726803A (en) * | 2018-06-12 | 2018-11-02 | 浙江荣晟环保纸业股份有限公司 | A kind of paper waste control calcium technique for anaerobic tower |
Non-Patent Citations (1)
| Title |
|---|
| 薛守庆等: "《缓蚀剂的应用》", 30 June 2019, 哈尔滨工程大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116377751A (en) * | 2022-11-25 | 2023-07-04 | 上海昶法新材料有限公司 | Preparation method of pulping auxiliary |
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