阅读说明：本技术 一种纸浆和饲养联产的清洁生产工艺 (Clean production process for pulp and feeding co-production ) 是由 马新功 马明蔚 张萌 曹光春 万乔 魏福康 武长安 闫成宝 巩莉 刘道广 徐世利 于 2021-01-21 设计创作，主要内容包括：本发明涉及造纸技术领域,具体是一种纸浆和饲养联产的清洁生产工艺,包括原料处理、蒸煮、洗浆、黑液制肥、磨浆和成浆六个步骤。本发明设计新颖,工艺考究,环保、清洁,利用麦草粉吸附黑液中的有机物和灰分,同时残余的亚铵、N、P、K等在扩散和毛细管作用下,也会部分转移至麦草粉中,进而达到净化黑液的效果,处理成本低,同时吸附后的麦草粉搭配配料和微量元素可以制成蛋白饲料,起到废物重新利用的效果,避免了材料浪费,降低了加工成本,且增加了整体的经济收益。(The invention relates to the technical field of papermaking, in particular to a clean production process for pulp and feeding co-production, which comprises six steps of raw material treatment, cooking, pulp washing, black liquor fertilizer making, pulp grinding and pulp forming. The method has the advantages of novel design, exquisite process, environmental protection and cleanness, the wheat straw powder is used for adsorbing organic matters and ash in the black liquor, meanwhile, the residual ammonium sulfite, N, P, K and the like can be partially transferred into the wheat straw powder under the action of diffusion and capillaries, so that the effect of purifying the black liquor is achieved, the treatment cost is low, meanwhile, the adsorbed wheat straw powder can be prepared into protein feed by matching ingredients and trace elements, the effect of recycling wastes is achieved, the material waste is avoided, the processing cost is reduced, and the overall economic benefit is increased.)

1. A clean production process for pulp and feeding co-production is characterized by comprising the following steps:

step 1, raw material treatment: wheat straw growing in a pollution-free area is extruded and dehydrated and then cut into grass particles with the same size through a grass cutter, and meanwhile, impurities in the grass particles are removed through air separation equipment, so that the overall quality of the raw materials is ensured;

step 2, cooking: putting the cooking liquor and the grass particles into a digester according to the size of the digester for cooking at normal pressure to obtain coarse slurry;

step 3, washing pulp: performing multi-section pulp washing on the coarse pulp by a drum type displacement pulp washer, and separating wheat straw fiber semi-finished pulp and black liquor by extrusion;

step 4, preparing fertilizer from black liquor: grinding leftover materials generated during wheat straw cutting into wheat straw powder, putting the wheat straw powder into a container, adding black liquor into the container, stirring for 5min at normal temperature, and filtering to obtain adsorbed wheat straw powder and waste liquor;

adding new wheat straw powder into the waste liquid, stirring at normal temperature for 5min, and filtering;

putting the adsorbed wheat straw powder and auxiliary materials into a fermentation tank, mixing and stirring the wheat straw powder and the auxiliary materials with a hot storage feed leavening agent, fermenting for 45 hours at normal temperature in a sealed state to prepare a fermentation material, adding lactic acid bacteria and trace elements into the fermentation material, fully stirring, and preparing into protein pellet feed by a screw puffing device;

step 5, grinding into thick liquid: putting the wheat straw fiber semi-finished product pulp into a high-concentration pulp grinder, dividing and brooming the surface of the wheat straw fiber semi-finished product pulp, and improving the papermaking performance of the wheat straw fiber semi-finished product pulp to obtain high-quality pulp;

step 6, pulping: and (3) subjecting the high-quality pulp to recreation, deslagging and pressure screening to finally obtain the high-quality paper pulp.

2. A clean production process for pulp and feed co-production as claimed in claim 1, wherein the moisture content of the grass particles in step 1 is 45% -60%.

3. The clean production process for pulp and feed co-production according to claim 1, wherein the cooking temperature in the step 2 is 70-90 ℃ and the cooking time is 20-50 min.

4. The clean production process of pulp and feeding co-production according to claim 1, wherein the ingredients are any one of straw, corn and sweet potato, and the ratio of the ingredients to the wheat straw powder is 1: 1.

5. a clean production process for pulp and feed co-production according to claim 1, characterized in that 1L black liquor or waste liquor is added per 50g wheat straw in step 4.

6. The clean production process for pulp and feed co-production according to claim 1, wherein the trace elements in step 4 comprise hemoglobin, zinc and copper, and the ratio of the hemoglobin to the zinc to the copper is 1: 1: 1.

7. the clean production process of pulp and feed co-production according to claim 1, wherein the waste liquid in the step 4 can be reused for 3-5 times until the organic matter and ash in the waste liquid are completely absorbed.

Technical Field

The invention relates to the technical field of papermaking, in particular to a clean production process for pulp and feeding co-production.

Background

Paper making is an important invention for ancient Chinese workers. The method is divided into a mechanism mode and a manual mode. The mechanism is continuously carried out on a paper machine, pulp suitable for paper quality is diluted to certain concentration by water, and is primarily dewatered at a wire part of the paper machine to form a wet paper sheet, and then the wet paper sheet is pressed for dewatering and then dried to form paper.

The black liquor separated after pulp washing in the prior papermaking technology cannot be directly discharged due to the fact that the black liquor contains more organic matters and inorganic matters, the black liquor can be appointed to be discharged only when the black liquor reaches a discharge standard after being purified, manpower, financial resources and time need to be consumed in the purification process, labor cost and financial cost are increased invisibly, and in addition, the organic matters and part of the inorganic matters in the black liquor are directly treated, so that material waste can be caused. Accordingly, one skilled in the art provides a clean production process for pulp and feed co-production to solve the problems set forth in the background art described above.

Disclosure of Invention

The invention aims to provide a clean production process for pulp and feed co-production, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a clean production process for pulp and feeding co-production comprises the following steps:

step 1, raw material treatment: wheat straw growing in a pollution-free area is extruded and dehydrated and then cut into grass particles with the same size through a grass cutter, and meanwhile, impurities in the grass particles are removed through air separation equipment, so that the overall quality of the raw materials is ensured;

step 2, cooking: putting the cooking liquor and the grass particles into a digester according to the size of the digester for cooking at normal pressure to obtain coarse slurry;

step 3, washing pulp: performing multi-section pulp washing on the coarse pulp by a drum type displacement pulp washer, and separating wheat straw fiber semi-finished pulp and black liquor by extrusion;

step 4, preparing fertilizer from black liquor: grinding leftover materials generated during wheat straw cutting into wheat straw powder, putting the wheat straw powder into a container, adding black liquor into the container, stirring for 5min at normal temperature, and filtering to obtain adsorbed wheat straw powder and waste liquor;

adding new wheat straw powder into the waste liquid, stirring at normal temperature for 5min, and filtering;

putting the adsorbed wheat straw powder and auxiliary materials into a fermentation tank, mixing and stirring the wheat straw powder and the auxiliary materials with a hot storage feed leavening agent, fermenting for 45 hours at normal temperature in a sealed state to prepare a fermentation material, adding lactic acid bacteria and trace elements into the fermentation material, fully stirring, and preparing into protein pellet feed by a screw puffing device;

step 5, grinding into thick liquid: putting the wheat straw fiber semi-finished product pulp into a high-concentration pulp grinder, dividing and brooming the surface of the wheat straw fiber semi-finished product pulp, and improving the papermaking performance of the wheat straw fiber semi-finished product pulp to obtain high-quality pulp;

step 6, pulping: and (3) subjecting the high-quality pulp to recreation, deslagging and pressure screening to finally obtain the high-quality paper pulp.

As a further aspect of the invention: the water content of the grass particles in the step 1 is 45-60%.

As a further aspect of the invention: in the step 2, the cooking temperature is 70-90 ℃, and the cooking time is 20-50 min.

As a further aspect of the invention: the batching adopts any one of straw, corn and sweet potato, and the proportion of batching and wheat straw powder is 1: 1.

as a further aspect of the invention: in the step 4, 1L of black liquor or waste liquor is prepared for every 50g of wheat straw powder.

As a further aspect of the invention: in the step 4, the trace elements comprise hemoglobin, zinc and copper, and the proportion of the hemoglobin, the zinc and the copper is 1: 1: 1.

as a further aspect of the invention: and the waste liquid in the step 4 can be reused for 3-5 times until organic matters and ash in the waste liquid are completely absorbed.

Compared with the prior art, the invention has the beneficial effects that: the method has the advantages of novel design, exquisite process, environmental protection and cleanness, the wheat straw powder is used for adsorbing organic matters and ash in the black liquor, meanwhile, the residual ammonium sulfite, N, P, K and the like can be partially transferred into the wheat straw powder under the action of diffusion and capillaries, so that the effect of purifying the black liquor is achieved, the treatment cost is low, meanwhile, the adsorbed wheat straw powder can be prepared into protein feed by matching ingredients and trace elements, the effect of recycling wastes is achieved, the material waste is avoided, the processing cost is reduced, and the overall economic benefit is increased.

Detailed Description

In the embodiment of the invention, the clean production process for pulp and feeding co-production comprises the following steps:

step 1, raw material treatment: wheat straw growing in a pollution-free area is extruded and dehydrated and then cut into grass particles with the same size through a grass cutter, and meanwhile, impurities in the grass particles are removed through air separation equipment, so that the overall quality of the raw materials is ensured;

step 2, cooking: putting the cooking liquor and the grass particles into a digester according to the size of the digester for cooking at normal pressure to obtain coarse slurry;

step 3, washing pulp: performing multi-section pulp washing on the coarse pulp by a drum type displacement pulp washer, and separating wheat straw fiber semi-finished pulp and black liquor by extrusion;

step 4, preparing fertilizer from black liquor: grinding leftover materials generated during wheat straw cutting into wheat straw powder, putting the wheat straw powder into a container, adding black liquor into the container, stirring for 5min at normal temperature, and filtering to obtain adsorbed wheat straw powder and waste liquor;

adding new wheat straw powder into the waste liquid, stirring at normal temperature for 5min, and filtering;

putting the adsorbed wheat straw powder and auxiliary materials into a fermentation tank, mixing and stirring the wheat straw powder and the auxiliary materials with a hot storage feed leavening agent, fermenting for 45 hours at normal temperature in a sealed state to prepare a fermentation material, adding lactic acid bacteria and trace elements into the fermentation material, fully stirring, and preparing into protein pellet feed by a screw puffing device;

step 5, grinding into thick liquid: putting the wheat straw fiber semi-finished product pulp into a high-concentration pulp grinder, dividing and brooming the surface of the wheat straw fiber semi-finished product pulp, and improving the papermaking performance of the wheat straw fiber semi-finished product pulp to obtain high-quality pulp;

step 6, pulping: and (3) subjecting the high-quality pulp to recreation, deslagging and pressure screening to finally obtain the high-quality paper pulp.

Further, the water content of the grass particles in the step 1 is 45% -60%.

Further, in the step 2, the cooking temperature is 70-90 ℃, and the cooking time is 20-50 min.

Further, the ingredients adopt any one of straws, corns and sweet potatoes, and the proportion of the ingredients to the wheat straw powder is 1: 1.

further, in step 4, 1L of black liquor or waste liquor is added to every 50g of wheat straw powder.

Further, in the step 4, the trace elements comprise hemoglobin, zinc and copper, and the proportion of the hemoglobin, the zinc and the copper is 1: 1: 1.

further, the waste liquid in the step 4 can be reused for 3-5 times until the organic matters and ash in the waste liquid are completely absorbed.

Test example:

the treatment with the black liquor treatment method (reference example) and the process of the present application (comparative example) common to the paper industry were used to measure the reduction rates of COD and BOD in the final black liquor:

the test results were as follows:

group of	COD removal reduction (%)	BOD removal reduction (%)
			Reference example	13.2	10.5
Comparative example	22.6	18.7

The COD removal reduction rate of the scheme is 22.6 percent and the BOD removal reduction rate of the scheme is 18.7 percent by combining the data, compared with the treatment method of the reference example, the method has the advantage of larger degree, meanwhile, the method does not need to be washed by water, has lower cost and is cleaner, adopts wheat straw powder as a purification adsorption material, can purify black liquor, can also be used for preparing feed, reduces the material waste, increases the overall economic benefit and has wider market prospect.

In summary, the following steps: the method has the advantages of novel design, exquisite process, environmental protection and cleanness, the wheat straw powder is used for adsorbing organic matters and ash in the black liquor, meanwhile, the residual ammonium sulfite, N, P, K and the like can be partially transferred into the wheat straw powder under the action of diffusion and capillaries, so that the effect of purifying the black liquor is achieved, the treatment cost is low, meanwhile, the adsorbed wheat straw powder can be prepared into protein feed by matching ingredients and trace elements, the effect of recycling wastes is achieved, the material waste is avoided, the processing cost is reduced, and the overall economic benefit is increased.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.