阅读说明：本技术 一种胎牛手套皮革制作方法 (Method for manufacturing fetal calf glove leather ) 是由 柯坎 于 2021-09-30 设计创作，主要内容包括：一种胎牛手套皮革制作方法,它涉及皮革技术领域。它包含回湿处理、中和处理、填充处理、加脂处理、固色处理、搭马静置过夜、次日伸展、晾干、回潮、摔软、绷板与烫光。各工序水的添加量和其它添加原料重量的依据均以裸皮重量的100％计,回湿处理中各个原料与裸皮裸皮重量的百分比：水100％、酸性酶3％、1％油脂分散剂、0.5％脱脂剂与0.5甲酸。采用上述技术方案回湿处理步骤之前通过含酶助剂、复合脱毛酶制剂及脂肪酶对裸皮处理,保证脱毛洁净生产、提高质量,减低废水中的中CODcr、氨氮、硫化物的浓度,减轻环境治理的压力的效果,回湿处理中的酸性酶使得皮革软化,本发明制作方法制得的手套皮革的透气性、柔软性、颜色丰满性以及贴肤性效果好的效果。(A method for manufacturing fetal calf glove leather relates to the technical field of leather. The method comprises the steps of moisture regain treatment, neutralization treatment, filling treatment, fatting treatment, color fixation treatment, setting up and standing overnight, stretching the next day, airing, moisture regain, softening, toggling and lustring. The addition amount of water in each process and the weight of other added raw materials are calculated according to 100 percent of the weight of the naked hide, and the weight percentage of each raw material to the weight of the naked hide in the rewetting treatment is as follows: 100% of water, 3% of acid enzyme, 1% of grease dispersing agent, 0.5% of degreasing agent and 0.5% of formic acid. According to the technical scheme, before the step of rewetting treatment, the pelts are treated by the aid of the enzyme-containing auxiliary agent, the compound unhairing enzyme preparation and the lipase, so that the unhairing clean production is guaranteed, the quality is improved, the concentration of CODcr, ammonia nitrogen and sulfide in wastewater is reduced, the pressure of environmental treatment is relieved, and the leather is softened by the aid of acid enzyme in the rewetting treatment.)

1. The method for manufacturing the fetal bovine glove leather is characterized by comprising the following steps: the addition amount of water and the weight of other added raw materials in each process are calculated by 100 percent of the weight of the naked hide,

and (3) rewetting treatment: placing the naked skin into a rotary drum, adding 85-110% of water into the rotary drum, wherein the temperature of the water is 45-50 degrees, adding 2.5-3.5% of acid enzyme, 0.9-1.1% of grease dispersant, 0.4-0.6% of degreasing agent and 0.4-0.6% of formic acid into the rotary drum, rotating the rotary drum for 110-130 minutes to ensure that the pH value reaches 3.0-3.2, and then draining and washing;

retanning treatment: putting the pelts after the rewetting treatment into a rotary drum, adding 160% of water into the rotary drum at the temperature of 30-35 degrees, adding 1.8-2.2% of fatty aldehyde and 1.4-1.6% of light-resistant synthetic fat liquor into the rotary drum, rotating the rotary drum for 20-25 minutes, then adding 4.5-5.5% of chromium tannin and 0.3-0.7% of electrolyte-resistant fat liquor into the rotary drum, rotating the rotary drum for 60-65 minutes, supplementing 140% of water into the rotary drum at the temperature of 30-35 degrees and 1.8-2.2% of sodium formate, rotating the rotary drum for 20-25 minutes, adding 0.4-0.6% of baking soda into the rotary drum, rotating the rotary drum for 40-45 minutes to ensure that the pH value reaches 4.0-4.2, rotating the rotary drum for 30-35 minutes for the next time, and then draining and washing the water;

and (3) neutralization treatment: putting the pelts after the retanning treatment into a rotary drum, adding 160% of 140-160% of water into the rotary drum, wherein the temperature of the water is 35-40 degrees, adding 2.5-3.5% of neutralizing agent and 1.8-2.2% of sodium formate into the rotary drum, rotating the rotary drum for 20-25 minutes, adding 0.4-0.6% of baking soda and 0.2-0.4% of ammonium bicarbonate into the rotary drum, rotating the rotary drum for 60-65 minutes to ensure that the pH value reaches 5.4-5.5, and then draining and washing;

filling treatment: adding the neutralized pelts into a rotary drum, adding 45-55% of water into the rotary drum, wherein the temperature of the water is 35-40 degrees, adding 4.5-5.5% of melamine resin, 3.5-4.5% of amino resin, 3.5-4.5% of acid synthetic tannin, 3.5-4.5% of collagen, 1.8-2.2% of dispersing agent, 3-4% of plant tanning agent and 3-4% of dye into the rotary drum, rotating the rotary drum for 90-95 minutes, adding 140-160% of water into the rotary drum, wherein the temperature of the water is 50-55 degrees, rotating the rotary drum for 10-20 minutes, adding 0.9-1.1% of formic acid into the rotary drum, rotating the rotary drum for 20-25 minutes, and then draining and washing with water;

fat liquoring treatment: putting the filled pelts into a rotary drum, adding 180-220% of water into the rotary drum, wherein the temperature of the water is 55-60 ℃, adding 2-3% of light-resistant synthetic fatting agent, 4-6% of phosphate fatting agent, 5.5-6.5% of waterproof oil, 1.2-1.7% of softening agent, 0.4-0.6% of humectant and 1.1-1.3% of formic acid, rotating the rotary drum for 15-20 minutes, adding 1.1-1.3% of formic acid into the rotary drum, rotating the rotary drum for 15-20 minutes to ensure that the pH value reaches 3.8-3.9, and then draining and washing;

and (3) fixation treatment: putting the greased pelts into a rotary drum, adding 110% of 100-110% of water into the rotary drum, wherein the temperature of the water is 55-60 ℃, adding 0.9-1.1% of formic acid, rotating the rotary drum for 20-25 minutes, adding 0.4-0.6% of cationic color fixing agent and 0.4-0.6% of nonionic oil, rotating the rotary drum for 20-25 minutes, draining, washing with water, and taking out the pelts from the drum;

setting up and standing overnight, stretching the next day, airing, dampening, softening, toggling and polishing.

2. The method for manufacturing the fetal bovine glove leather as claimed in claim 1, wherein the draining and washing in the rewetting treatment is specifically that after the rotary drum stops rotating, the liquid in the rotary drum is drained, then 180-200% of water is added into the rotary drum, the temperature of the water is 30-40 degrees, the rotary drum rotates for 10-15 minutes, and the draining and washing are carried out twice.

3. The method for manufacturing the fetal bovine glove leather as claimed in claim 1, wherein the draining and washing in the retanning treatment is specifically that after the rotary drum stops rotating, the liquid in the rotary drum is drained, then 280-300% of water is added into the rotary drum, the temperature of the water is 30-40 degrees, the rotary drum rotates for 10-15 minutes, and the draining and washing are carried out twice.

4. The method for manufacturing the fetal bovine glove leather as claimed in claim 1, wherein the water draining and washing in the neutralization treatment is specifically that after the rotary drum stops rotating, the liquid in the rotary drum is drained, then 180-200% of water is added into the rotary drum, the temperature of the water is 30-40 degrees, the rotary drum rotates for 10-15 minutes, and the water draining and washing are carried out once.

5. The method for manufacturing the fetal bovine glove leather as claimed in claim 1, wherein the draining and washing in the filling process comprises draining off the liquid of the rotary drum after the rotary drum stops rotating, then adding 280-300% of water into the rotary drum, wherein the temperature of the water is 30-40 degrees, the rotary drum rotates for 10-15 minutes, and the draining and washing are performed once.

6. The method for manufacturing the fetal bovine glove leather as claimed in claim 1, wherein the draining and washing in the greasing treatment comprises draining the liquid of the drum after the drum stops rotating, then adding 180-200% water into the drum, wherein the temperature of the water is 30-40 degrees, the drum rotates for 10-15 minutes, and the draining and washing is performed once.

Technical Field

The invention relates to the technical field of leather, in particular to a method for manufacturing fetal calf glove leather.

Background

Along with the sustainable development of economy in China, the living standard of people is improved, the safety production consciousness is enhanced, the demand on labor protection products is larger and larger, the quality requirement on products is higher and higher, and the method provides infinite vitality for the development of the industry of the labor protection products and also provides new challenges. Leather is used as a material with excellent performance, and has been applied to various fields of production and life for long time because of excellent comprehensive performances of air permeability, heat insulation, wear resistance, puncture resistance and the like.

The hand feeling of the traditional glove leather is usually hard, the hand feeling is granular, the softness is not enough, and the requirements of users cannot be met, so that improvement is needed.

Disclosure of Invention

The invention aims to provide a method for manufacturing fetal calf glove leather aiming at the defects and shortcomings of the prior art, and the fetal calf glove leather has the advantages of improving the air permeability, the flexibility, the plumpness and the skin adhesion of the leather.

In order to achieve the purpose, the invention adopts the technical scheme that: a method for manufacturing fetal calf glove leather comprises the following steps: the addition amount of water and the weight of other added raw materials in each process are calculated according to 100 percent of the weight of the naked hide, and the rewetting treatment comprises the following steps: placing the naked skin into a rotary drum, adding 85-110% of water into the rotary drum, wherein the temperature of the water is 45-50 degrees, adding 2.5-3.5% of acid enzyme, 0.9-1.1% of grease dispersant, 0.4-0.6% of degreasing agent and 0.4-0.6% of formic acid into the rotary drum, rotating the rotary drum for 110-130 minutes to ensure that the pH value reaches 3.0-3.2, and then draining and washing; retanning treatment: putting the dewetted bare skin into a rotary drum, adding 160% of water into the rotary drum at the temperature of 30-35 degrees, adding 1.8-2.2% of fatty aldehyde and 1.4-1.6% of light-resistant synthetic fat liquor into the rotary drum, rotating the rotary drum for 20-25 minutes, then adding 4.5-5.5% of chromium tannin and 0.3-0.7% of electrolyte-resistant fat liquor into the rotary drum, rotating the rotary drum for 60-65 minutes, adding 140% of 160% of water into the rotary drum, adding 30-35 degrees of water and 1.8-2.2% of sodium formate into the rotary drum, rotating the rotary drum for 20-25 minutes, adding 0.4-0.6% of Stachy butter into the rotary drum, rotating the rotary drum for 40-45 minutes to ensure that the pH value reaches 4.0-4.2, rotating the rotary drum for 30-35 minutes next day, and then draining and washing; and (3) neutralization treatment: putting the pelts after the retanning treatment into a rotary drum, adding 160% of 140-160% of water into the rotary drum, wherein the temperature of the water is 35-40 degrees, adding 2.5-3.5% of neutralizing agent and 1.8-2.2% of sodium formate into the rotary drum, rotating the rotary drum for 20-25 minutes, adding 0.4-0.6% of Stachys sieboldii and 0.2-0.4% of ammonium bicarbonate into the rotary drum, rotating the rotary drum for 60-65 minutes to ensure that the pH value reaches 5.4-5.5, and then draining and washing; filling treatment: adding the neutralized pelts into a rotary drum, adding 45-55% of water into the rotary drum, wherein the temperature of the water is 35-40 degrees, adding 4.5-5.5% of melamine resin, 3.5-4.5% of amino resin, 3.5-4.5% of acid synthetic tannin, 3.5-4.5% of collagen, 1.8-2.2% of dispersing agent, 3-4% of plant tanning agent and 3-4% of dye into the rotary drum, rotating the rotary drum for 90-95 minutes, adding 140-160% of water into the rotary drum, wherein the temperature of the water is 50-55 degrees, rotating the rotary drum for 10-20 minutes, adding 0.9-1.1% of formic acid into the rotary drum, rotating the rotary drum for 20-25 minutes, and then draining and washing with water; fat liquoring treatment: putting the filled pelts into a rotary drum, adding 180-220% of water into the rotary drum, wherein the temperature of the water is 55-60 ℃, adding 2-3% of light-resistant synthetic fat liquor, 4-6% of phosphate fat liquor, 5.5-6.5% of waterproof oil, 1.2-1.7% of softening agent, 0.4-0.6% of humectant and 1.1-1.3% of formic acid, rotating the rotary drum for 15-20 minutes, adding 1.1-1.3% of formic acid into the rotary drum, rotating the rotary drum for 15-20 minutes to ensure that the pH value reaches 3.8-3.9, and then draining and washing; and (3) fixation treatment: putting the greased pelts into a rotary drum, adding 110% of 100-110% of water into the rotary drum, wherein the temperature of the water is 55-60 ℃, adding 0.9-1.1% of formic acid, rotating the rotary drum for 20-25 minutes, adding 0.4-0.6% of cationic color fixing agent and 0.4-0.6% of nonionic oil, rotating the rotary drum for 20-25 minutes, draining, washing with water, and taking out the pelts from the drum; setting up and standing overnight, stretching the next day, airing, dampening, softening, toggling and polishing.

The water draining and washing in the rewetting treatment specifically comprises draining the liquid of the rotary drum after the rotary drum stops rotating, then adding 180-200% of water into the rotary drum, wherein the temperature of the water is 30-40 degrees, the rotary drum rotates for 10-15 minutes, and the water draining and washing are carried out twice.

The water draining and washing in the retanning treatment is specifically that after the rotary drum stops rotating, liquid in the rotary drum is drained, then 280 plus 300 percent of water is added into the rotary drum, the temperature of the water is 30-40 degrees, the rotary drum rotates for 10-15 minutes, and the water draining and washing are carried out twice.

The water draining and washing in the neutralization treatment is specifically that after the rotary drum stops rotating, the liquid in the rotary drum is drained, then 180 plus 200 percent of water is added into the rotary drum, the temperature of the water is 30-40 degrees, the rotary drum rotates for 10-15 minutes, and the water is drained and washed once.

The water draining and washing in the filling treatment specifically comprises the steps of draining liquid of the rotary drum after the rotary drum stops rotating, then adding 280 plus 300 percent of water into the rotary drum, wherein the temperature of the water is 30-40 degrees, the rotary drum rotates for 10-15 minutes, draining and washing once.

The draining and washing in the greasing treatment specifically comprises draining liquid of the rotary drum after the rotary drum stops rotating, then adding 180-200% of water into the rotary drum, wherein the temperature of the water is 30-40 degrees, the rotary drum rotates for 10-15 minutes, and the draining and washing are carried out once.

After the technical scheme is adopted, the invention has the beneficial effects that: the method has the advantages that the naked skin is treated by the aid of the enzyme-containing auxiliary agent, the compound unhairing enzyme preparation and the lipase before the rewetting treatment step, unhairing clean production is guaranteed, product quality is improved, the concentration of CODcr, ammonia nitrogen and sulfide in wastewater is greatly reduced, and the pressure of environmental management is relieved.

Detailed Description

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 as necessary without making a contribution thereto after reading the present specification, but all are protected by the patent law within the scope of the claims of the present invention.

The embodiment relates to a method for manufacturing fetal calf glove leather, which comprises the following steps: the addition amount of water and the weight of other added raw materials in each process are calculated according to 100 percent of the weight of the naked hide, and the rewetting treatment comprises the following steps: putting the bare skin into a rotary drum, adding 85-110% of water into the rotary drum, wherein the temperature of the water is 45-50 degrees, adding 2.5-3.5% of acid enzyme, 0.9-1.1% of grease dispersant, 0.4-0.6% of degreasing agent and 0.4-0.6% of formic acid into the rotary drum, rotating the rotary drum for 110-130 minutes to ensure that the pH value reaches 3.0-3.2, checking the air permeability of the leather, and then draining and washing the leather; preferably, the weight percentage of each raw material to the weight of the naked hide in the rewetting treatment is as follows: 100% of water, 3% of acid enzyme, 1% of grease dispersing agent, 0.5% of degreasing agent and 0.5% of formic acid. In other embodiments, the weight percentage of each raw material to the weight of the pelts in the rewetting treatment is as follows: 110% of water, 3.5% of acid enzyme, 1.1% of grease dispersant, 0.6% of degreasing agent and 0.6% of formic acid.

Retanning treatment: putting the pelts after the rewetting treatment into a rotary drum, adding 160% of water into the rotary drum at the temperature of 30-35 degrees, adding 1.8-2.2% of fatty aldehyde and 1.4-1.6% of light-resistant synthetic fatting agent into the rotary drum, rotating the rotary drum for 20-25 minutes, then adding 4.5-5.5% of chrome tannin and 0.3-0.7% of electrolyte-resistant fatting agent into the rotary drum, rotating the rotary drum for 60-65 minutes, supplementing 140% of 160% of water into the rotary drum, wherein the temperature of the water is 30-35 degrees and 1.8-2.2% of sodium formate, rotating the rotary drum for 20-25 minutes, adding 0.4-0.6% of baking soda into the rotary drum, rotating the rotary drum for 40-45 minutes to ensure that the pH value reaches 4.0-4.2, rotating the rotary drum for 30-35 minutes for the next time, and then draining and washing; preferably, the weight percentage of each raw material to the weight of the naked hide in the retanning treatment is as follows: 150% of water, 2% of fatty aldehyde, 1.5% of light-resistant synthetic fat liquor, 5% of chromium tannin, 0.5% of electrolyte-resistant fat liquor, 150% of supplementary water, 2% of sodium formate and 0.5% of Stachys sieboldii. In other examples, the percentage of each raw material to weight of the pelt in the retanning treatment is: 160% of water, 2.2% of fatty aldehyde, 1.6% of light-resistant synthetic fat liquor, 5.5% of chrome tannin, 0.7% of electrolyte-resistant fat liquor, supplement 140% of water, 1.8% of sodium formate and 0.4% of baking soda.

And (3) neutralization treatment: putting the pelts after the retanning treatment into a rotary drum, adding 160% of 140-160% of water into the rotary drum, wherein the temperature of the water is 35-40 degrees, adding 2.5-3.5% of neutralizing agent and 1.8-2.2% of sodium formate into the rotary drum, rotating the rotary drum for 20-25 minutes, adding 0.4-0.6% of baking soda and 0.2-0.4% of ammonium bicarbonate into the rotary drum, rotating the rotary drum for 60-65 minutes to ensure that the pH value reaches 5.4-5.5, and then draining and washing; preferably, the weight percentage of each raw material to the weight of the naked hide in the neutralization treatment is as follows: 150% of water, 3% of neutralizing agent, 2% of sodium formate, 0.5% of baking soda and 0.5% of ammonium bicarbonate. In other embodiments, 160% water, 3.5% neutralizer, 2.2% sodium formate, 0.6% baking soda, 0.6% ammonium bicarbonate.

Filling treatment: adding the neutralized pelts into a rotary drum, adding 45-55% of water into the rotary drum, wherein the temperature of the water is 35-40 degrees, adding 4.5-5.5% of melamine resin, 3.5-4.5% of amino resin, 3.5-4.5% of acid synthetic tannin, 3.5-4.5% of collagen, 1.8-2.2% of dispersing agent, 3-4% of plant tanning agent and 3-4% of dye into the rotary drum, rotating the rotary drum for 90-95 minutes, adding 140-160% of water into the rotary drum, wherein the temperature of the water is 50-55 degrees, rotating the rotary drum for 10-20 minutes, adding 0.9-1.1% of formic acid into the rotary drum, rotating the rotary drum for 20-25 minutes, and then draining and washing with water; preferably, the percentage of each raw material to the weight of the naked hide in the filling treatment is as follows: 50% of water, 5% of melamine resin, 4% of amino resin, 4% of acid synthetic tannin, 4% of collagen, 2% of dispersing agent, 150% of supplementary water and 1% of formic acid. In other examples, 45% water, 4.5% melamine resin, 3.5% amine-based resin, 3.5% acid synthetic tannin, 3.5% collagen, 1.8% dispersant, make-up 160% water, 1.1% formic acid.

Fat liquoring treatment: putting the filled pelts into a rotary drum, adding 180-220% of water into the rotary drum, wherein the temperature of the water is 55-60 ℃, adding 2-3% of light-resistant synthetic fat liquor, 4-6% of phosphate ester fat liquor, 5.5-6.5% of waterproof oil, 1.2-1.7% of softening agent, 0.4-0.6% of humectant and 1.1-1.3% of formic acid, rotating the rotary drum for 15-20 minutes, adding 1.1-1.3% of formic acid into the rotary drum, rotating the rotary drum for 15-20 minutes to ensure that the pH value reaches 3.8-3.9, and then draining and washing; preferably, the weight percentage of each raw material to the weight of the naked hide in the fat liquoring treatment is as follows: 200% of water, 6% of waterproof oil, 1.5% of softening agent, 0.5% of humectant and 2.5% of formic acid. In this example, 220% water, 6.5% waterproof oil, 1.7% softener, 0.6% humectant, 2.6% formic acid.

And (3) fixation treatment: putting the fatliquoring-treated pelts into a rotary drum, adding 110% of 100-110% of water into the rotary drum, wherein the temperature of the water is 55-60 ℃, adding 0.9-1.1% of formic acid, rotating the rotary drum for 20-25 minutes, adding 0.4-0.6% of cationic color fixing agent and 0.4-0.6% of non-ionic oil, rotating the rotary drum for 20-25 minutes, draining, washing with water, and taking out the pelts from the drum; preferably, the weight percentage of each raw material to the weight of the naked hide in the color fixing treatment is as follows: 105% of water, 1% of formic acid, 0.5% of cationic fixing agent and 0.5% of nonionic oil. In other embodiments, 100% water, 0.9% formic acid, 0.4% cationic fixing agent, and 0.4% nonionic oil.

Setting aside overnight, stretching, drying in air, remoistening, beating, stretching and scalding. Before the rewetting treatment step, the fleshed cowhide is put into a rotary drum, then 100 percent and 150 percent of water temperature of the tare weight is added, the water temperature is 30-35 degrees, 0.8-1.0 percent of enzyme-containing auxiliary agent is added, alkali is added into the rotary drum to ensure that the pH value reaches 9.6-9.7, the rotary drum stops rotating and combining for 65-85 minutes, 1.6-1.7 percent of lime is added into the rotary drum, and the rotary drum rotates for 60-65 minutes. Adding 0.2-2.0% of compound depilatory enzyme preparation and 1-3% of lipase into the rotary drum, simultaneously keeping the bath temperature of the rotary drum at 30-35 ℃, rotating the rotary drum for 80-100 minutes, adding soda powder into the rotary drum to make the pH value reach 10-11, and rotating the rotary drum for 40-60 minutes.

The drum-out building is specifically leather drum-out, horse-beating and standing for more than 12 hours. Stretching is a three-knife method, without returning the knife, stretching the back. The airing body is used for stretching and drying the leather on a stretching machine. The moisture regaining is to carry out moisture regaining on the bottom and the surface of the leather and to stand for 2.5 to 3 hours. The tumbling is carried out by hot tumbling for 4-8 h in a tumbling drum (temperature 45-60 ℃), and then tumbling for 6-15 h at normal temperature, and then out of the drum. And (5) airing the toggling plate. The natural luster finishing method specifically comprises the step of putting the leather on a tumbling mill with the temperature of 90-110 ℃ and the pressure of a press roll of 6-8 kilograms per square centimeter for natural luster finishing.

In this embodiment, the draining and washing in the rewetting treatment is specifically that after the rotation of the drum is stopped, the liquid in the drum is drained, then 180-200% of water is added into the drum, the temperature of the water is 30-40 °, the drum rotates for 10-15 minutes, and the draining and washing are performed twice.

The water draining and washing in the retanning treatment is specifically that after the rotary drum stops rotating, liquid in the rotary drum is drained, then 280 plus 300 percent of water is added into the rotary drum, the temperature of the water is 30-40 degrees, the rotary drum rotates for 10-15 minutes, and the water draining and washing are carried out twice.

The water draining and washing in the neutralization treatment is specifically that after the rotary drum stops rotating, the liquid in the rotary drum is drained, then 180 plus 200 percent of water is added into the rotary drum, the temperature of the water is 30-40 degrees, the rotary drum rotates for 10-15 minutes, and the water is drained and washed once.

The water draining and washing in the filling treatment specifically comprises the steps of draining liquid of the rotary drum after the rotary drum stops rotating, then adding 280 plus 300 percent of water into the rotary drum, wherein the temperature of the water is 30-40 degrees, the rotary drum rotates for 10-15 minutes, draining and washing once.

The draining and washing in the greasing treatment specifically comprises draining liquid of the rotary drum after the rotary drum stops rotating, then adding 180-200% of water into the rotary drum, wherein the temperature of the water is 30-40 degrees, the rotary drum rotates for 10-15 minutes, and the draining and washing are carried out once.

The working principle of the invention is roughly as follows: the method has the advantages that the naked leather is treated by the aid of the enzyme-containing auxiliary agent, the compound unhairing enzyme preparation and the lipase before the rewetting treatment step, unhairing clean production is guaranteed, product quality is improved, the concentration of CODcr, ammonia nitrogen and sulfide in wastewater is greatly reduced, and the pressure of environmental management is relieved.

The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention should be covered by the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.