阅读说明：本技术 一种塑料颗粒生产线中污泥的处理方法 (Method for treating sludge in plastic particle production line ) 是由 于欠喜 于 2019-11-29 设计创作，主要内容包括：本发明公开了一种塑料颗粒生产线中所产生的污泥处理方法,包括预处理、生物降解、干燥、催化燃烧、调Ph、压制砖等步骤。本发明不仅为再生塑料颗粒生产企业的污泥处理找到一条合适的处理途径,实现达标处理,利于环保,而且增加了企业的附加值。(The invention discloses a method for treating sludge generated in a plastic particle production line, which comprises the steps of pretreatment, biodegradation, drying, catalytic combustion, Ph regulation, brick pressing and the like. The invention not only finds a proper treatment way for the sludge treatment of the regenerated plastic particle production enterprises, realizes the standard treatment, is beneficial to environmental protection, but also increases the added value of the enterprises.)

1. A method for treating sludge generated in a plastic particle production line is characterized in that,

(1) pretreatment: collecting sludge generated by a regenerated plastic particle production line, intensively and batched putting the sludge into a treatment pool, and adjusting the pH value of the sludge to be more than 4 and less than 6;

(2) biodegradation: adding rhamnolipid, phosphate and nitrate into a treatment pool, uniformly stirring, inoculating bacillus, pseudomonas, flavobacterium, photosynthetic bacteria and actinomycetes, wherein the inoculation amounts of the bacillus, the pseudomonas, the flavobacterium, the photosynthetic bacteria and the actinomycetes are respectively 3-5%, 1-2% and 1%, uniformly stirring after inoculation, slowly and continuously stirring substances in the treatment pool, and continuing for 12-14 hours after inoculation to obtain degraded sludge;

(3) and (3) drying: drying the degraded sludge treated in the step (2) in a conventional dehydration mode or a sun drying mode or an air drying mode until the water content is lower than 7%;

(4) catalytic combustion: uniformly stirring the dry sludge obtained in the step (3) with coal and an alkali metal catalyst in advance, and then feeding the mixture into a high-temperature furnace for combustion at the temperature of 200 ℃ and 800 ℃ for 3-5h, wherein the addition of the coal is 3-8% of the dry sludge, and the addition of the catalyst is 1.5-3%;

(5) adding lime into the combustion ash obtained by the treatment in the step (4), and adjusting the pH value to 7-8;

(6) pressing the bricks: and (4) uniformly mixing the combustion product obtained by the treatment in the step (4), fly ash, crushed construction waste and cement, and making the brick in an environment-friendly light brick mode.

2. The method as claimed in claim 1, wherein the rhamnolipid, nitrate and phosphate are added in an amount of 1%, 8-15% and 0.5-1% of the total amount of sludge, respectively.

3. The method for treating the sludge generated in the plastic particle production line according to claim 1 or 2, wherein the catalyst added in the catalytic combustion is one or two of potassium carbonate and sodium chloride which are mixed according to any proportion.

4. The method as claimed in claim 3, wherein the catalytic combustion is divided into four stages, wherein the first stage is combustion at 300 ℃ for 0.5-0.8h, the second stage is combustion at 500 ℃ for 1-2h, the third stage is combustion at 700 ℃ for 0.8-1.5h, and the fourth stage is combustion at 800 ℃ for 0.3-0.7 h.

5. The method for treating sludge generated in the plastic pellet production line as claimed in claim 1, wherein in the brick pressing step, the weight ratio of the comburent, the fly ash, the crushed construction waste and the cement is: 20-30:3-5:10-20:5-8.

6. The method as claimed in claim 1, wherein the particle size of the combustion products, fly ash and construction waste is 100-500 mesh in the brick pressing step.

Technical Field

The invention relates to the technical field of regenerated plastic particle production technology and environmental protection, in particular to a method for treating sludge generated in a plastic particle production line.

Background

The recycled plastic granules are plastic granules obtained by recycling used new materials or waste plastics, extruding the new materials or the waste plastics by a screw machine and then cutting the waste plastics into granules by a granulator. In the production process of the regenerated plastic particles, especially the raw materials of waste woven bags (polypropylene is used as a main component), waste plastic bottles (polyethylene, polypropylene and the like are used as main components) and the like can generate a large amount of waste water and harmful gases, and the waste water and the harmful gases can meet the standard and can be discharged after reaching the standard after being treated. During the treatment of the waste water and harmful gas, a lot of sludge is generated, and the sludge contains grease, ink and a small amount of harmful oil stains, wherein the oil stains are mainly particles coated by light hydrocarbon like gasoline or kerosene generated during the decomposition of the vinyl polymer. At present, the sludge is only simply calcified and then transported to a fixed place for piling, because the treatment capacity is very large, according to incomplete statistics, the amount of the sludge produced by an enterprise every day reaches dozens of tons, and if no proper treatment mode exists, the environment can be suffered later.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a reasonably designed method for treating sludge generated in a plastic particle production line.

In order to achieve the purpose, the invention adopts the technical scheme that: a method for treating sludge generated in a plastic particle production line is characterized in that,

(1) pretreatment: collecting sludge generated by a regenerated plastic particle production line, intensively and batched putting the sludge into a treatment pool, and adjusting the pH value of the sludge to be more than 4 and less than 6;

(2) biodegradation: adding rhamnolipid, phosphate and nitrate into a treatment pool, uniformly stirring, inoculating bacillus, pseudomonas, flavobacterium, photosynthetic bacteria and actinomycetes, wherein the inoculation amounts of the bacillus, the pseudomonas, the flavobacterium, the photosynthetic bacteria and the actinomycetes are respectively 3-5%, 1-2% and 1%, uniformly stirring after inoculation, slowly and continuously stirring substances in the treatment pool, and continuing for 12-14 hours after inoculation to obtain degraded sludge;

(3) and (3) drying: drying the degraded sludge treated in the step (2) in a conventional dehydration mode or a sun drying mode or an air drying mode until the water content is lower than 7%;

(4) catalytic combustion: uniformly stirring the dry sludge obtained in the step (3) with coal and an alkali metal catalyst in advance, and then feeding the mixture into a high-temperature furnace for combustion at the temperature of 200 ℃ and 800 ℃ for 3-5h, wherein the addition of the coal is 3-8% of the dry sludge, and the addition of the catalyst is 1.5-3%;

(5) adding lime into the combustion ash obtained by the treatment in the step (4), and adjusting the pH value to 7-8;

(6) pressing the bricks: and (4) uniformly mixing the combustion product obtained by the treatment in the step (4), fly ash, crushed construction waste and cement, and making the brick in an environment-friendly light brick mode.

Preferably, the rhamnolipid, nitrate and phosphate are added in an amount of 1%, 8-15% and 0.5-1% of the total amount of sludge, respectively.

Preferably, the catalyst added in the catalytic combustion is one or two of potassium carbonate and sodium chloride which are mixed according to any proportion.

Preferably, the catalytic combustion is divided into four stages, wherein the first stage is combustion at 200-.

Preferably, in the step of pressing bricks, the weight ratio of the comburent, the fly ash, the crushed construction waste and the cement is as follows: 20-30:3-5:10-20:5-8.

Preferably, in the step of pressing bricks, the comburent, the fly ash and the construction waste need to meet the requirement that the granularity is 100-500 meshes respectively.

Compared with the prior art, the invention has the beneficial effects that:

the invention carries out biodegradation on sludge, decomposes most harmful organic matters (the removal rate of harmful oil stains reaches more than 92%) carried in the sludge into carbon dioxide and water, further removes harmful substances such as toluene and the like through catalytic combustion, thereby obtaining standard-reaching combustion products, and finally, after the combustion products replace most of fly ash (the replacement rate reaches more than 80%), the combustion products are made into light bricks together with construction wastes, cement and the like, and the light bricks can be used in the field of buildings; not only finds a suitable treatment way for the sludge treatment of the recycled plastic particle production enterprises, realizes the standard treatment, is beneficial to environmental protection, but also increases the added value of the enterprises. In addition, the invention adopts a proper catalyst and burns with coal in four stages, thus relatively improving the comprehensive combustion characteristic of the sludge and having good combustion effect of the sludge.

Detailed Description

The invention will now be further elucidated with reference to specific embodiments. The following are merely preferred embodiments of the present invention, which are not intended to limit the scope of the present invention. Any equivalent or similar substitutes should fall within the scope of protection of the invention without departing from the concept thereof.