A non-wood fiber biochemical mechanical pulp production process using pulping black liquor to produce fulvic acid fertilizer

Abstract

The invention provides a non-wood fiber biochemical mechanical pulp production process using pulping black liquor to produce fulvic acid fertilizer. The multi-stage process of the process is to extract the fulvic acid, extract the pulping black liquor, collect the black liquor rich in fulvic acid, and extract it twice to obtain it. The existing use of pulping black liquor to produce fulvic acid fertilizer only involves the use of chemical pulping black liquor to produce fulvic acid fertilizer and does not involve the use of chemical pulping technology to produce fulvic acid from pulping black liquor, which greatly limits The utilization and development of straw resources by non-wood fiberized mechanical pulp requires beneficial development and breakthroughs in both technology and practice. The steps are simple, the operation is convenient, the practicability is strong, and the economic, ecological and social value is high.

Description

technical field

[0001] The invention discloses a non-wood fiber biochemical mechanical pulp production process for producing fulvic acid fertilizer by using pulping black liquor, and relates to the technical field of preparing and producing fulvic acid fertilizer by using non-wood fiberized mechanical pulp pulping black liquor. Specifically, it relates to the field of pulping and papermaking, and relates to the field of biological fertilizer production. Background technique

[0002] Pulping and papermaking is faced with two basic issues, one is environmental issues and the other is resource issues. The environment, especially the pulping black liquor must be under strict environmental control, and the second is how to make full and effective use of papermaking resources.

[0003] The basic situation of my country's papermaking resources is the shortage of wood resources rather than the abundance of wood fiber resources. In addition to wheat straw, cotton stalks, corn stalks...

Examples

Embodiment 1

[0042] 1. Raw material preparation: After the cotton stalks are crushed and dedusted, the raw materials enter the washing process.

[0043] 2. Washing material: Circulating water washing material, use 16 pulping post-processing links to enrich water, or make up clean water;

[0044] 3. Dehydration: Dehydration through the dehydration spiral washing material;

[0045] 4. One-time extraction (alkaline hydrolysis extraction of fulvic acid): generally add 0-5% potassium hydroxide according to different raw materials. The raw material reaches saturated moisture at the end of cooking, generally at a moisture content of 75-80%. Here, the first source of replenishment water comes from the black liquor extraction link, or supplements from the post-processing link of 16 pulping;

[0046] 5. Extrusion and thread rolling (extrusion vermicelli black liquor collection): specifically: the twin-screw thread rolling machine is used to complete three functions in sequence: the first is extrus...

Embodiment 2

[0059] Using cotton straw as raw material to produce chemical-mechanical pulp to prepare fulvic acid fertilizer:

[0060] 1. Raw material preparation: Cotton stalks are crushed to 2-5cm by a pulverizer and dedusted, and the raw materials enter the washing process.

[0061] 2. Washing material: Circulating water washing material, use 14 pulping post-processing links to enrich water, or make up clean water;

[0062] 3. Dehydration: Dehydration through the dehydration spiral washing material;

[0063] 4. Cooking: adding 3% potassium hydroxide by weight of raw materials. The raw material reaches saturated moisture at the end of cooking, generally at a moisture content of 75-80%. The source of replenishment water here comes from the 10 pulping link, or supplements from the 14 pulping post-processing link. Soften the raw material by steaming and soaking.

[0064] 5. Extrusion and thread rolling (extrusion vermicelli black liquor collection): The twin-screw thread rolling machine...

Embodiment 3

[0078] Other conditions are identical with embodiment 2, and difference is: take peroxide method extraction for three extractions. That is, the peroxide method of fulvic acid: add hydrogen peroxide, the concentration is 2-5% of the absolute dry weight of the pulp, the pulp concentration is 10-15%, the temperature is 60-90°C, and the pH value is adjusted to 7-10.5 with KOH. Time 60-150min.

technical field

[0001] The invention discloses a non-wood fiber biochemical mechanical pulp production process for producing fulvic acid fertilizer by using pulping black liquor, and relates to the technical field of preparing and producing fulvic acid fertilizer by using non-wood fiberized mechanical pulp pulping black liquor. Specifically, it relates to the field of pulping and papermaking, and relates to the field of biological fertilizer production. Background technique

[0002] Pulping and papermaking is faced with two basic issues, one is environmental issues and the other is resource issues. The environment, especially the pulping black liquor must be under strict environmental control, and the second is how to make full and effective use of papermaking resources.

[0003] The basic situation of my country's papermaking resources is the shortage of wood resources rather than the abundance of wood fiber resources. In addition to wheat straw, cotton stalks, corn stalks...

Examples

Embodiment 1

[0042] 1. Raw material preparation: After the cotton stalks are crushed and dedusted, the raw materials enter the washing process.

[0043] 2. Washing material: Circulating water washing material, use 16 pulping post-processing links to enrich water, or make up clean water;

[0044] 3. Dehydration: Dehydration through the dehydration spiral washing material;

[0045] 4. One-time extraction (alkaline hydrolysis extraction of fulvic acid): generally add 0-5% potassium hydroxide according to different raw materials. The raw material reaches saturated moisture at the end of cooking, generally at a moisture content of 75-80%. Here, the first source of replenishment water comes from the black liquor extraction link, or supplements from the post-processing link of 16 pulping;

[0046] 5. Extrusion and thread rolling (extrusion vermicelli black liquor collection): specifically: the twin-screw thread rolling machine is used to complete three functions in sequence: the first is extrus...

Embodiment 2

[0059] Using cotton straw as raw material to produce chemical-mechanical pulp to prepare fulvic acid fertilizer:

[0060] 1. Raw material preparation: Cotton stalks are crushed to 2-5cm by a pulverizer and dedusted, and the raw materials enter the washing process.

[0061] 2. Washing material: Circulating water washing material, use 14 pulping post-processing links to enrich water, or make up clean water;

[0062] 3. Dehydration: Dehydration through the dehydration spiral washing material;

[0063] 4. Cooking: adding 3% potassium hydroxide by weight of raw materials. The raw material reaches saturated moisture at the end of cooking, generally at a moisture content of 75-80%. The source of replenishment water here comes from the 10 pulping link, or supplements from the 14 pulping post-processing link. Soften the raw material by steaming and soaking.

[0064] 5. Extrusion and thread rolling (extrusion vermicelli black liquor collection): The twin-screw thread rolling machine...

Embodiment 3

[0078] Other conditions are identical with embodiment 2, and difference is: take peroxide method extraction for three extractions. That is, the peroxide method of fulvic acid: add hydrogen peroxide, the concentration is 2-5% of the absolute dry weight of the pulp, the pulp concentration is 10-15%, the temperature is 60-90°C, and the pH value is adjusted to 7-10.5 with KOH. Time 60-150min.