Purification treatment method for recycling stem washing water in paper-making reconstituted tobacco production process

Abstract

The invention discloses a purification treatment method for recycling stem washing water in a paper-making reconstituted tobacco production process. The stem washing water after washing a tobacco stem raw material in the paper-making reconstituted tobacco production process is purified by a membrane separation technology to meet technical requirements on the stem washing water. The method is characterized by comprising the steps of filtering the stem washing water with a rectangular screen, importing filtrate into a ceramic membrane separation system to remove macromolecular substances such as pectin and sugar, obtaining dialysate and trapped fluid, importing the dialysate into a reverse osmosis membrane system to remove pigments and salt substances, and obtaining purified water and concentrated water. The purified water can directly enter a stem washing water system for recycling. The method solves the problems that massive emission of the stem washing water pollutes an environment, a utilization rate of production water is low, and the new water consumption is high in the prior art.

Description

Technical field

[0001] The present invention disclosed the purification treatment method used by the circulation of sink water during the production of papermaking. In particular, the purification treatment method of cycling used in the water washing water during the production of papermaking was involved.It belongs to the field of paper production technology technology. Background technique

[0002] At present, the production of cigarettes is different from traditional production methods. It is characterized by a certain percentage of tobacco -cigarette leaves added to natural tobacco to improve the chemical composition of tobacco. It has a good role in reducing coke and consumption.It is suitable for the development of various types of cigarette products.The production of cigarette leaves includes rolling method, thick pulp and papermaking method. Among them, the papermaking reconstruction of tobacco leaf production technology is currently the latest and most commonly used prod...

Examples

Embodiment 1

[0025] 1. Randomly take stem washing water from the reconstituted tobacco leaf production line of papermaking method, and send samples to determine the color, conductivity, pH, and chemical oxygen demand (COD) of the washing water. cr ), biochemical oxygen demand (BOD 5 ), suspended solids (SS) and other physical and chemical indicators.

[0026] 2. Introduce the stem-washing water into a 60-80 mesh rectangular sieve device for preliminary filtration to obtain a preliminary filtrate, and collect the retained substances of the filtrate.

[0027] 3. Import 20kg of the filtrate in 2 into the ceramic membrane separation system for separation. The membrane element-tubular membrane core is used with a membrane core with a pore size of 200nm. The working pressure is 0.2-0.5MPa and the working flow rate is 5-10m / s. Membrane separation was carried out under the working parameters of the solution temperature not higher than 80°C, and 18.51kg of dialysate and 1.52kg of retentate (concen...

Embodiment 2

[0032] 1. Randomly take the stem washing water from the reconstituted tobacco leaf production line of papermaking method, and send the sample to determine the color, conductivity, pH, and COD of the stem washing water cr 、BOD 5 , SS and other physical and chemical indicators.

[0033] 2. Introduce the stem-washing water into a 60-80 mesh rectangular sieve device for preliminary filtration to obtain a preliminary filtrate, and collect the retained substances of the filtrate.

[0034]3. Import 20kg of the filtrate in 2 into the ceramic membrane separation system for separation. The membrane element-tubular membrane core is used with a membrane core with a pore size of 50nm. The working pressure is 0.2-0.5MPa and the working flow rate is 5-10m / s. Membrane separation was carried out under the operating parameters where the liquid temperature was not higher than 80°C, and 18.62K of dialysate and 1.4kg of retentate (concentrated water) containing solid insolubles, pectin, wind glue...

Embodiment 3

[0039] 1. Randomly take the stem washing water from the reconstituted tobacco leaf production line of papermaking method, and send the sample to determine the color, conductivity, pH, and COD of the stem washing water cr 、BOD 5 , SS and other physical and chemical indicators.

[0040] 2. Introduce the stem-washing water into a 60-80 mesh rectangular sieve device for preliminary filtration to obtain a preliminary filtrate, and collect the retained substances of the filtrate.

[0041] 3. Import 20kg of the filtrate in 2 into the ceramic membrane separation system for separation. The membrane element-tubular membrane core is used with a membrane core with a pore size of 25nm. The working pressure is 0.2-0.5MPa and the working flow rate is 5-10m / s. Membrane separation was carried out under the working parameters of the liquid temperature not higher than 80°C, and 18.85kg of dialysate and 1.2kg of retentate (concentrated water) containing solid insolubles, pectin, wind glue, sugar...

Technical field

[0001] The present invention disclosed the purification treatment method used by the circulation of sink water during the production of papermaking. In particular, the purification treatment method of cycling used in the water washing water during the production of papermaking was involved.It belongs to the field of paper production technology technology. Background technique

[0002] At present, the production of cigarettes is different from traditional production methods. It is characterized by a certain percentage of tobacco -cigarette leaves added to natural tobacco to improve the chemical composition of tobacco. It has a good role in reducing coke and consumption.It is suitable for the development of various types of cigarette products.The production of cigarette leaves includes rolling method, thick pulp and papermaking method. Among them, the papermaking reconstruction of tobacco leaf production technology is currently the latest and most commonly used prod...

Examples

Embodiment 1

[0025] 1. Randomly take stem washing water from the reconstituted tobacco leaf production line of papermaking method, and send samples to determine the color, conductivity, pH, and chemical oxygen demand (COD) of the washing water. cr ), biochemical oxygen demand (BOD 5 ), suspended solids (SS) and other physical and chemical indicators.

[0026] 2. Introduce the stem-washing water into a 60-80 mesh rectangular sieve device for preliminary filtration to obtain a preliminary filtrate, and collect the retained substances of the filtrate.

[0027] 3. Import 20kg of the filtrate in 2 into the ceramic membrane separation system for separation. The membrane element-tubular membrane core is used with a membrane core with a pore size of 200nm. The working pressure is 0.2-0.5MPa and the working flow rate is 5-10m / s. Membrane separation was carried out under the working parameters of the solution temperature not higher than 80°C, and 18.51kg of dialysate and 1.52kg of retentate (concen...

Embodiment 2

[0032] 1. Randomly take the stem washing water from the reconstituted tobacco leaf production line of papermaking method, and send the sample to determine the color, conductivity, pH, and COD of the stem washing water cr 、BOD 5 , SS and other physical and chemical indicators.

[0033] 2. Introduce the stem-washing water into a 60-80 mesh rectangular sieve device for preliminary filtration to obtain a preliminary filtrate, and collect the retained substances of the filtrate.

[0034]3. Import 20kg of the filtrate in 2 into the ceramic membrane separation system for separation. The membrane element-tubular membrane core is used with a membrane core with a pore size of 50nm. The working pressure is 0.2-0.5MPa and the working flow rate is 5-10m / s. Membrane separation was carried out under the operating parameters where the liquid temperature was not higher than 80°C, and 18.62K of dialysate and 1.4kg of retentate (concentrated water) containing solid insolubles, pectin, wind glue...

Embodiment 3

[0039] 1. Randomly take the stem washing water from the reconstituted tobacco leaf production line of papermaking method, and send the sample to determine the color, conductivity, pH, and COD of the stem washing water cr 、BOD 5 , SS and other physical and chemical indicators.

[0040] 2. Introduce the stem-washing water into a 60-80 mesh rectangular sieve device for preliminary filtration to obtain a preliminary filtrate, and collect the retained substances of the filtrate.

[0041] 3. Import 20kg of the filtrate in 2 into the ceramic membrane separation system for separation. The membrane element-tubular membrane core is used with a membrane core with a pore size of 25nm. The working pressure is 0.2-0.5MPa and the working flow rate is 5-10m / s. Membrane separation was carried out under the working parameters of the liquid temperature not higher than 80°C, and 18.85kg of dialysate and 1.2kg of retentate (concentrated water) containing solid insolubles, pectin, wind glue, sugar...

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