阅读说明：本技术 一种富水渣土絮凝脱水剂及其脱水方法 (Water-rich muck flocculation dehydrating agent and dehydrating method thereof ) 是由 王文华 于 2019-10-30 设计创作，主要内容包括：本发明涉及一种絮凝脱水剂,具体为一种富水渣土絮凝脱水剂及其脱水方法,包括以下原料：聚丙烯酰胺、纤维素、改性硅藻土、活性炭、重金属离子捕集剂、微生物絮凝剂、促凝剂、氯及其化合物、高锰酸钾和甲壳素；采用的原料来源广泛、价格低廉,大大降低了污泥脱水处理的运行成本；针对富水渣土,在减少脱水时间的同时又进行了深度脱水,脱水效果好；只需要使用压滤机械,无需使用离心机等设置,进一步降低富水渣土脱水处理成本；有净水功效,排出的水符合环保要求,不会造成二次污染。(The invention relates to a flocculation dehydrating agent, in particular to a water-rich muck flocculation dehydrating agent and a dehydrating method thereof, which comprises the following raw materials: polyacrylamide, cellulose, modified diatomite, active carbon, a heavy metal ion trapping agent, a microbial flocculant, a coagulant, chlorine and compounds thereof, potassium permanganate and chitin; the adopted raw materials have wide sources and low price, and the operation cost of sludge dehydration treatment is greatly reduced; aiming at the water-rich slag soil, the deep dehydration is carried out while the dehydration time is reduced, and the dehydration effect is good; only a filter pressing machine is needed, and a centrifugal machine and the like are not needed, so that the dehydration treatment cost of the water-rich slag soil is further reduced; has the effect of purifying water, and the discharged water meets the environmental protection requirement and does not cause secondary pollution.)

1. A water-rich muck flocculation dehydrating agent is characterized in that: the method comprises the following raw materials: polyacrylamide, cellulose, modified diatomite, activated carbon, a heavy metal ion trapping agent, a microbial flocculant, a coagulant, chlorine and compounds thereof, potassium permanganate and chitin.

2. The water-rich muck flocculating and dewatering agent as claimed in claim 1, wherein: the modification method of the modified diatomite comprises the following steps: the surface modification of diatomaceous earth was carried out with cetyltrimethylammonium bromide and tetramethylammonium bromide.

3. The water-rich muck flocculating and dewatering agent as claimed in claim 1, wherein: the coagulant is one or a mixture of triethanolamine, formate and acetate.

4. The water-rich muck flocculating and dewatering agent as claimed in claim 1, wherein: the microbial flocculant is NOC-1 or PF 101.

5. The water-rich muck flocculating and dewatering agent as claimed in claim 1, wherein: the chlorine and the compound thereof are a mixture of sodium chloride and ferric chloride in a weight ratio of 3: 1.

6. The water-rich muck flocculating and dewatering agent as claimed in claim 1, wherein: the composite material comprises the following raw materials in parts by weight: 20-30 parts of polyacrylamide, 10-15 parts of cellulose, 2-6 parts of modified diatomite, 1-5 parts of activated carbon, 1-3 parts of heavy metal ion trapping agent, 1-2 parts of microbial flocculant, 1-2 parts of coagulant, 1-2 parts of chlorine and chlorine compound, 1-3 parts of potassium permanganate and 1-5 parts of chitin.

7. The water-rich muck flocculating and dewatering agent according to claim 6, wherein: the composite material comprises the following raw materials in parts by weight: 25 parts of polyacrylamide, 18 parts of cellulose, 4 parts of modified diatomite, 3 parts of activated carbon, 2 parts of heavy metal ion trapping agent, 1.5 parts of microbial flocculant, 1.5 parts of coagulant, 1.5 parts of chlorine and compounds thereof, 2 parts of potassium permanganate and 3 parts of chitin.

8. The method for dewatering a water-rich muck flocculating and dewatering agent according to any one of claims 1 to 7, characterised in that: the method comprises the following steps:

s1, preparing a flocculation dehydrating agent, namely uniformly mixing polyacrylamide, cellulose, modified diatomite, activated carbon, a heavy metal ion trapping agent, a coagulant, chlorine and a compound thereof, potassium permanganate and chitin according to a weight part ratio, grinding into powder, sieving with a 300-plus-500-mesh sieve for later use as a material A, and separately placing a microbial flocculant for later use as a material B;

s2, adding the material A into the water-rich slag soil to be treated, uniformly stirring, standing for 10-20min, adding the material B into the sludge, continuously uniformly stirring, and standing for 30-60 min;

s3, carrying out mechanical filter pressing on the water-rich slag soil added with the flocculating and dehydrating agent to separate water;

and S4, filtering the separated water again, and discharging after the detection is qualified.

9. The dewatering method of the water-rich muck flocculating and dewatering agent according to claim 8, characterized in that: in S2, the weight ratio of the flocculation dewatering agent to the water-rich residue soil is (1-5): 100.

Technical Field

The invention relates to a flocculation dehydrating agent, in particular to a water-rich muck flocculation dehydrating agent and a dehydrating method thereof.

Background

The urban transformation generates a large amount of waste residue soil, wherein part of the waste residue soil has high water content, so the waste residue soil can be used as a building material filler after being treated by stacking, airing or centrifugal dehydration, but the stacking, airing pollutes the environment and has a long treatment period; the centrifugal dewatering needs to spend a large amount of time cost and money cost, the centrifugal dewatering machine has large investment and consumes a large amount of electric energy, a long operating line is needed, the produced sewage needs to be further treated, the treatment links are too many, particularly for muddy water, the water is difficult to throw out even if the imported centrifugal dewatering machine is used due to the large viscosity ratio of the muddy water.

Therefore, no matter the natural airing is carried out for a long time, or the centrifugal dehydration is carried out for a short time, the method is not suitable for treating the water-rich muck, a new treatment process is needed, the rapid treatment can be realized, the cold reaction is environment-friendly and energy-saving, the investment is low, and the environment is not polluted, so the chemical flocculation is considered to be adopted, the water is tightly locked in the soil, the soil is flocculated under the cold reaction, the water cannot be absorbed again on the surface, the water has hydrophobic and hydrophobic characteristics, and the water is automatically cleaned and purified after the filtration, thereby reaching the national direct discharge standard.

Disclosure of Invention

The invention aims to provide a water-rich muck flocculating and dehydrating agent and a dehydrating method thereof.

In order to achieve the purpose, the invention adopts the following technical scheme:

a water-rich muck flocculating and dehydrating agent comprises the following raw materials: polyacrylamide, cellulose, modified diatomite, activated carbon, a heavy metal ion trapping agent, a microbial flocculant, a coagulant, chlorine and compounds thereof, potassium permanganate and chitin.

Preferably, the modification method of the modified diatomite comprises the following steps: the surface modification of diatomaceous earth was carried out with cetyltrimethylammonium bromide and tetramethylammonium bromide.

Preferably, the coagulant is one or a mixture of triethanolamine, formate and acetate.

Preferably, the microbial flocculant is NOC-1 or PF 101.

In 1985, Takagi H et al studied a flocculant PF101 produced by a microorganism of penicillin mimetic (Paecilomyces sp.l-1), which has a good flocculation effect on Bacillus subtilis, Escherichia coli, beer yeast, red blood cells, activated sludge, cellulose powder, activated carbon, diatomaceous earth, alumina, etc. In 1986, Kurane et al developed successfully microbial flocculant NOC-1 from Rhodococcus erythropolis (Rhodococcus erythropolis), which has excellent flocculation and decoloration effects on Escherichia coli, yeast, muddy water, river water, fly ash water, activated carbon powder water, expanded sludge, pulp wastewater and the like, and is the best microbial flocculant discovered at present.

Preferably, the chlorine and its compounds are a 3:1 mixture of sodium chloride and ferric chloride.

Preferably, the water-rich muck flocculating and dehydrating agent comprises the following raw materials in parts by weight: 20-30 parts of polyacrylamide, 10-15 parts of cellulose, 2-6 parts of modified diatomite, 1-5 parts of activated carbon, 1-3 parts of heavy metal ion trapping agent, 1-2 parts of microbial flocculant, 1-2 parts of coagulant, 1-2 parts of chlorine and chlorine compound, 1-3 parts of potassium permanganate and 1-5 parts of chitin.

Preferably, the water-rich muck flocculating and dehydrating agent comprises the following raw materials in parts by weight: 25 parts of polyacrylamide, 18 parts of cellulose, 4 parts of modified diatomite, 3 parts of activated carbon, 2 parts of heavy metal ion trapping agent, 1.5 parts of microbial flocculant, 1.5 parts of coagulant, 1.5 parts of chlorine and compounds thereof, 2 parts of potassium permanganate and 3 parts of chitin.

The polyacrylamide in the invention is a water-soluble linear high molecular polymer which is formed by polymerizing acrylamide monomers through free radical initiation, has good flocculation property, can reduce the friction resistance between liquids, and can be divided into four types of non-ionic, anionic, cationic and amphoteric types according to the ionic characteristics.

The cellulose in the invention is macromolecular polysaccharide consisting of glucose. The cellulose is a polysaccharide which is widely distributed and has the maximum content in the nature, accounts for more than 50 percent of the carbon content in the plant, and can be modified with polyacrylamide to improve the flocculation capability.

The chemical components of the modified diatomite of the invention are mainly SiO²Containing a small amount of Al²O³、Fe²O³CaO, MgO, etc. and organic matter, the density of diatomite is 1.9-2.3 g/cm³Bulk density of 0.34-0.65 g/cm³The specific surface area is 40-65 square meters per gram, the pore volume is 0.45-0.98 cm3 per gram, the water absorption is 2-4 times of the self volume, and a special porous structure can be observed under an electron microscope; the surface of the diatomite is modified, so that the charge property of the surface of the diatomite can be changed, and the adsorption performance of the diatomite to negatively charged organic matters is improved.

The amorphous carbon obtained by processing the activated carbon has large specific surface area and good adsorption capacity on gas, inorganic or organic substances in solution, colloidal particles and the like.

The invention relates to a dehydration method of a water-rich muck flocculating and dehydrating agent, which comprises the following steps:

s1, preparing a flocculation dehydrating agent, namely uniformly mixing polyacrylamide, cellulose, modified diatomite, activated carbon, a heavy metal ion trapping agent, a coagulant, chlorine and a compound thereof, potassium permanganate and chitin according to a weight part ratio, grinding into powder, sieving with a 300-plus-500-mesh sieve for later use as a material A, and separately placing a microbial flocculant for later use as a material B;

s2, adding the material A into the water-rich slag soil to be treated, uniformly stirring, and standing for 10-20 min; adding the material B into the sludge, continuously stirring uniformly, and standing for 30-60 min;

s3, carrying out mechanical filter pressing on the water-rich slag soil added with the flocculating and dehydrating agent to separate water;

and S4, filtering the separated water again, detecting, and discharging after the detection is qualified.

Preferably, in S2, the weight ratio of the flocculation dewatering agent to the water-rich residue soil is (1-5): 100.

The invention has the beneficial effects that:

1. the adopted raw materials have wide sources and low price, and the operation cost of sludge dehydration treatment is greatly reduced.

2. Aiming at the water-rich slag soil, the deep dehydration is carried out while the dehydration time is reduced, and the dehydration effect is good.

3. Only a filter pressing machine is needed, and a centrifugal machine and the like are not needed, so that the dehydration treatment cost of the water-rich slag soil is further reduced.

4. Has the effect of purifying water, and the discharged water meets the environmental protection requirement and does not cause secondary pollution.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.