CN107670635B - Sewage treatment filler, preparation method and application - Google Patents

Sewage treatment filler, preparation method and application Download PDF

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Publication number
CN107670635B
CN107670635B CN201711176392.7A CN201711176392A CN107670635B CN 107670635 B CN107670635 B CN 107670635B CN 201711176392 A CN201711176392 A CN 201711176392A CN 107670635 B CN107670635 B CN 107670635B
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filler
sewage treatment
foaming agent
blank
sewage
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CN107670635A (en
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不公告发明人
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Guangdong Runjin Environmental Protection Industry Co ltd
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Guangdong Runjin Environmental Protection Industry Co ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/10Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
    • B01J20/103Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate comprising silica
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/04Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
    • B01J20/041Oxides or hydroxides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/10Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/10Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
    • B01J20/14Diatomaceous earth
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28002Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
    • B01J20/28004Sorbent size or size distribution, e.g. particle size
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/28016Particle form
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/28016Particle form
    • B01J20/28019Spherical, ellipsoidal or cylindrical
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28054Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
    • B01J20/28057Surface area, e.g. B.E.T specific surface area
    • B01J20/28064Surface area, e.g. B.E.T specific surface area being in the range 500-1000 m2/g
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/28Treatment of water, waste water, or sewage by sorption
    • C02F1/281Treatment of water, waste water, or sewage by sorption using inorganic sorbents

Abstract

The invention provides a filler for sewage treatment and a preparation method of the filler; in addition, the filler prepared by the invention can be used for carrying out high-efficiency dephosphorization treatment on sewage; meanwhile, the filler can be cut into particles, blocks or columns or spheres with corresponding sizes as required in the preparation process, so that the filler is directly matched with sewage treatment equipment or phosphorus removal equipment for use, namely the filler is directly filled into an adsorption column of the sewage treatment equipment or phosphorus removal equipment or a corresponding adsorbent container.

Description

Sewage treatment filler, preparation method and application
Technical Field
The invention relates to the field of sewage treatment, in particular to a sewage treatment filler, a preparation method and a related application.
Background
Sewage treatment is one of the important issues facing current environmental protection. With the continuous enhancement of human activities, nitrogen and phosphorus pollution of water bodies becomes more serious, for example, eutrophication of water bodies has caused serious water body pollution of rivers and lakes; among the most important influencing and controlling factors are phosphorus and nitrogen; nitrogen and phosphorus elements enter a water body to directly cause water body eutrophication, and phosphorus is a more deep reason for the water body eutrophication. In addition, the development of the urban industry can discharge a large amount of sewage, and the current situation of extensive breeding in rural areas can also lead to the generation of a large amount of domestic sewage.
At present, common technologies such as a biological filter, an artificial wetland and the like are mainly adopted for sewage treatment, and most of the technologies adopt fillers of biological membrane carriers. The filler is added, nitrogen and phosphorus and other elements in the sewage are removed by a chemical method, the effect is good, and no sludge is generated. However, the existing common sewage filler has the defects of complex composition, poor fixation, poor phosphorus removal effect and the like.
In addition, the inventor finds that in practical application, the existing various fillers cannot be directly matched with corresponding sewage treatment equipment or phosphorus/nitrogen removal equipment for use, and further cutting or treatment is needed, so that the filler is wasted; furthermore, the components of some existing phosphorus removal fillers comprise aluminum powder, the aluminum powder used in the preparation process is easy to generate secondary pollution and even explode, and the aluminum powder is high in cost and not easy to popularize on a large scale.
Disclosure of Invention
In order to solve the problems, the invention provides a filler for sewage treatment and a preparation method of the filler; in addition, the filler prepared by the invention can be used for carrying out high-efficiency dephosphorization treatment on sewage; meanwhile, the filler can be cut into particles, blocks or columns or spheres with corresponding sizes as required in the preparation process, so that the filler is directly matched with sewage treatment equipment or phosphorus removal equipment for use, namely the filler is directly filled into an adsorption column of the sewage treatment equipment or phosphorus removal equipment or a corresponding adsorbent container.
In a first aspect of the invention, there is provided a packing for use in a wastewater treatment process.
Specifically, the filler comprises the following components in parts by weight:
50-60% of fly ash, 10-15% of cement, 5% of foaming agent, quicklime, water and diatomite;
wherein the particle size of the filler is 10-50 mm, and the specific surface area of the filler is (50-60) × 104cm 2/g;
the phosphorus adsorption capacity of the filler is 6-6.5mgP/g, and the compressive strength is 4.0-4.5 Mpa;
the filler has a density of 1.0-1.2 g/cm3 and a bulk density of 0.6-0.75 g/cm 3.
Preferably, the weight component of the diatomaceous earth varies with the weight of the moisture component.
Preferably, the weight component of the diatomite is not less than 10%.
As another preference, wherein the diatomaceous earth has a weight component of not less than 5%.
The invention abandons the common aluminum powder component of the filler in the prior art, adopts the conventional foaming agent to form, reduces the cost and avoids secondary pollution.
In a second aspect of the invention, there is provided a process for the preparation of a filler,
specifically, a specific preparation method of the filler is provided, which comprises the following steps:
(1) weighing the fly ash, the diatomite, the quicklime, the cement, the foaming agent and the water according to a formula ratio, uniformly stirring to prepare slurry, introducing steam into the slurry, heating to 45 ℃, and then carrying out die casting;
(2) the gas generation initial setting is carried out on the cast blank at the room temperature of 60-70 ℃, and the time is 1.5-2 h;
(3) cutting the blank body, preparing uniform particles according to the requirement,
(4) curing for more than 6-12 h at the temperature of 175-180 ℃ to form the phosphorus removal filler containing a large amount of uniform and fine pores.
In order to achieve better effects compared with the filler containing aluminum powder in the prior art, before the step (2), the method further comprises the following steps: adding the foaming agent suspension 0.5-1.5 min before casting; the foaming agent suspension with the weight percentage concentration of 5% is prepared by quantitatively adding water into a foaming agent and stirring for 1-2 min.
In addition, in order to directly apply the filler to the existing sewage treatment equipment or phosphorus removal equipment, the method further comprises the following steps after the step (2): and air-drying the blank at normal temperature to prepare a spherical, blocky or columnar blank.
At this time, the size of the blank body which is made into a spherical shape, a block shape or a columnar shape can be determined according to the size of a packing container of the sewage treatment equipment or the dephosphorization equipment which is practically applied.
In order to realize better preparation effect, the blocky raw materials of the fly ash, the diatomite and the quicklime are crushed and ground for use; the cement powder raw material is directly used, and the foaming agent is prepared into a solution with the weight percentage concentration of 5-6%.
In addition, the inventor researches and discovers that the existing filler preparation method generally only comprises one roasting or one steam heating step, the density/discrimination of the obtained green body is not high, and the adsorption effect is to be improved. The inventors have made repeated studies and have also made the following improvements to the preparation: and roasting the fly ash, the diatomite, the quick lime, the cement and the foaming agent, adding gypsum for screening, mixing and stirring with water to obtain a green body, roasting the green body for the second time, and cooling to obtain the poured green body.
In other aspects of the present invention, there is also provided a method for treating sewage using the filler, the method comprising: the sewage is pretreated to remove obvious suspended matters, and then flows through the sewage treatment equipment filled with the filler.
After the filler is adopted to treat the sewage, the phosphorus content of the sewage in the treated water is lower than 0.04 mg/L.
The filler provided by the invention can be used in cooperation with sewage treatment equipment. The general sewage treatment equipment can comprise a hollow adsorption column, and the filler is directly filled in the adsorption column, so that the filler can be fully utilized, and resources are not wasted.
Compared with the prior art, the invention improves the sewage treatment efficiency, improves the resource utilization rate and reduces the decontamination cost. Mainly characterized by
(1) Avoiding the adoption of aluminum powder adsorbent or aluminum powder foaming agent. The filler component of the invention does not need to adopt aluminum powder, and the preparation process does not need to utilize the aluminum powder, so the preparation cost is reduced, and the secondary pollution is avoided;
(2) the filler provided by the invention is simple in composition, and can be prepared by adopting conventional raw materials, so that the purposes of environmental protection and energy conservation are really achieved;
(3) in the preparation process of the filler, secondary baking and treatment are adopted, so that the filler has better adsorption performance, larger contact area with sewage and obviously improved phosphorus removal effect;
(4) the prepared filler can be directly matched with the existing sewage treatment equipment or phosphorus removal equipment for use, the filling is easy, the use cost is greatly reduced, and the resource waste is avoided.
Detailed Description
In practical implementation, the fly ash, the diatomite, the cement and the foaming agent can be mixed according to the weight ratio of 55:10:10:5, and the quicklime and the water are added at the same time.
During the specific preparation, as another preferable mode, the blocky raw materials of the fly ash, the diatomite and the quicklime are crushed and ground into powder for use; the cement powder raw material is directly used, and the foaming agent is prepared into a solution with the weight percentage concentration of 5-6%.
Preferably, the particle size of the filler is 10-50 mm; specific surface area of the fillerIs (50-60) × 104cm2/g;
The phosphorus adsorption capacity of the filler is 6-6.5mgP/g, and the compressive strength is 4.0-4.5 Mpa;
the density of the filler is 1.0-1.2 g/cm3The bulk density is 0.6 to 0.75g/cm3
The specific preparation method comprises the following steps:
(1) weighing the fly ash, the diatomite, the quicklime, the cement, the foaming agent and the water according to a formula ratio, uniformly stirring to prepare slurry, introducing steam into the slurry, heating to 45 ℃, and then carrying out die casting;
(2) the gas generation initial setting is carried out on the cast blank at the room temperature of 60-70 ℃, and the time is 1.5-2 h;
(3) cutting the blank body, preparing uniform particles according to the requirement,
(4) curing for more than 6-12 h at the temperature of 175-180 ℃ to form the phosphorus removal filler containing a large amount of uniform and fine pores.
Preferably, before the step (2), further comprising: adding the foaming agent suspension 0.5-1.5 min before casting;
after the step (2), the following steps are also included:
and air-drying the blank at normal temperature to prepare a spherical, blocky or columnar blank.
Preferably, the foaming agent suspension with the weight percentage concentration of 5% is prepared by quantitatively adding water into a foaming agent and stirring for 1-2 min.
For better effect, before the green body is obtained, the following more preferable scheme is provided: and roasting the fly ash, the diatomite, the quick lime, the cement and the foaming agent, adding gypsum for screening, mixing and stirring with water to obtain a green body, roasting the green body for the second time, and cooling to obtain the poured green body.
In summary, the present invention provides a filler for sewage treatment, and a method for preparing the filler; in addition, the filler prepared by the invention can be used for carrying out high-efficiency dephosphorization treatment on sewage; meanwhile, the filler can be cut into particles, blocks or columns or spheres with corresponding sizes as required in the preparation process, so that the filler is directly matched with sewage treatment equipment or phosphorus removal equipment for use, namely the filler is directly filled into an adsorption column of the sewage treatment equipment or phosphorus removal equipment or a corresponding adsorbent container.
What is not specifically disclosed herein, e.g., blowing agents and the like, is within the skill of those in the art.

Claims (5)

1. A filler is used in a sewage treatment process and is characterized in that: the filler comprises the following components in parts by weight: 50-60% of fly ash, 10-15% of cement, 5% of foaming agent, quicklime, water and diatomite;
the foaming agent does not contain aluminum powder;
wherein the particle size of the filler is 10-50 mm, and the specific surface area of the filler is (50-60) × 104cm2/g;
The phosphorus adsorption capacity of the filler is 6-6.5mgP/g, and the compressive strength is 4.0-4.5 Mpa;
the density of the filler is 1.0-1.2 g/cm3The bulk density is 0.6 to 0.75g/cm3
The filler is prepared according to the following method:
roasting the fly ash, the diatomite, the quick lime, the cement and the foaming agent, adding gypsum for screening, mixing and stirring with water to obtain a blank, roasting the blank obtained after stirring for the second time, and cooling to obtain a poured blank;
air-drying the poured blank at normal temperature to prepare a spherical, blocky or columnar shape;
wherein the cement powdery raw material is directly used.
2. The filler of claim 1, wherein the weight component of the diatomaceous earth varies as a function of the weight of the moisture component.
3. The filler according to claim 1 or 2, wherein the diatomaceous earth has a composition by weight of not less than 5%.
4. A method of treating contaminated water using the filler material of claim 1, said method comprising: the sewage is pretreated to remove obvious suspended matters, and then flows through the sewage treatment equipment filled with the filler.
5. A sewage treatment apparatus comprising a hollow adsorption column, wherein the filler of claim 1 is packed in the adsorption column.
CN201711176392.7A 2017-11-23 2017-11-23 Sewage treatment filler, preparation method and application Active CN107670635B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711176392.7A CN107670635B (en) 2017-11-23 2017-11-23 Sewage treatment filler, preparation method and application

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Application Number Priority Date Filing Date Title
CN201711176392.7A CN107670635B (en) 2017-11-23 2017-11-23 Sewage treatment filler, preparation method and application

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CN107670635B true CN107670635B (en) 2020-07-28

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109225126A (en) * 2018-10-29 2019-01-18 云南兆泓环境工程有限公司 A kind of porous phosphorus removing filtrate and preparation method thereof based on diatomite and tripoli

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101623619A (en) * 2009-07-29 2010-01-13 东南大学 Foaming-type industrial waste residue base compound dephosphorization material
CN101863646A (en) * 2010-06-21 2010-10-20 南京工业大学 Filler special for artificial wetland and preparation method thereof
CN103739058A (en) * 2014-01-06 2014-04-23 上海交通大学 Sewage reinforced phosphorous removal packing and preparation method thereof
CN104909460A (en) * 2015-05-18 2015-09-16 上海交通大学 Porous nitrogen and phosphorus removal filler for artificial wetland and preparation method of porous nitrogen and phosphorus removal filler
CN105152340A (en) * 2015-06-23 2015-12-16 西安建筑科技大学 Red mud phosphate-removing filling material for constructed wetland and preparation method thereof
CN106824049A (en) * 2017-01-22 2017-06-13 西安建筑科技大学 A kind of dephosphorization filler and preparation method thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101623619A (en) * 2009-07-29 2010-01-13 东南大学 Foaming-type industrial waste residue base compound dephosphorization material
CN101863646A (en) * 2010-06-21 2010-10-20 南京工业大学 Filler special for artificial wetland and preparation method thereof
CN103739058A (en) * 2014-01-06 2014-04-23 上海交通大学 Sewage reinforced phosphorous removal packing and preparation method thereof
CN104909460A (en) * 2015-05-18 2015-09-16 上海交通大学 Porous nitrogen and phosphorus removal filler for artificial wetland and preparation method of porous nitrogen and phosphorus removal filler
CN105152340A (en) * 2015-06-23 2015-12-16 西安建筑科技大学 Red mud phosphate-removing filling material for constructed wetland and preparation method thereof
CN106824049A (en) * 2017-01-22 2017-06-13 西安建筑科技大学 A kind of dephosphorization filler and preparation method thereof

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