CN112387110A - Cover plate for removing volatile organic compounds in wastewater storage and treatment facility and manufacturing method thereof - Google Patents

Cover plate for removing volatile organic compounds in wastewater storage and treatment facility and manufacturing method thereof Download PDF

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Publication number
CN112387110A
CN112387110A CN202011176729.6A CN202011176729A CN112387110A CN 112387110 A CN112387110 A CN 112387110A CN 202011176729 A CN202011176729 A CN 202011176729A CN 112387110 A CN112387110 A CN 112387110A
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layer framework
cover plate
treatment facility
organic compounds
volatile organic
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CN112387110B (en
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张海玲
穆谦益
冀忠伦
赵敏
李岩
杨琴
任鹏
蒋继辉
刘沛华
范婧
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Petrochina Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8678—Removing components of undefined structure
    • B01D53/8687—Organic components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20707—Titanium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/80—Type of catalytic reaction
    • B01D2255/802—Photocatalytic
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Catalysts (AREA)
  • Physical Water Treatments (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)

Abstract

The invention discloses a cover plate for removing volatile organic compounds in a wastewater storage and treatment facility and a manufacturing method thereof. Experimental application shows that the amount of organic waste gas escaping to the atmosphere is reduced by more than 75% by adding the waste gas treatment module in a waste water storage and treatment facility system.

Description

Cover plate for removing volatile organic compounds in wastewater storage and treatment facility and manufacturing method thereof
[ technical field ] A method for producing a semiconductor device
The invention belongs to the field of environmental protection, and particularly relates to a cover plate for removing volatile organic compounds in a wastewater storage and treatment facility and a manufacturing method thereof.
[ background of the invention ]
Organic wastewater generally refers to wastewater with higher concentration of organic matters in the wastewater, and Chemical Oxygen Demand (COD) is an important index for measuring the content of the organic matters in the wastewater. Typical high-concentration organic wastewater such as coking wastewater, pharmaceutical wastewater, textile/printing and dyeing wastewater, petroleum/chemical wastewater and the like has COD concentration of more than 3000-5000 mg/L, and even tens of thousands to hundreds of thousands of mg/L. The industrially produced ultrahigh-concentration organic wastewater mainly has the following characteristics: firstly, the oxygen demand hazard is caused, the COD in the wastewater is high, and the high-concentration organic wastewater can cause the oxygen deficiency and even the anaerobism of the receiving water body due to the biodegradation effect, so that the aquatic organisms die, and the stink is generated; secondly, organic matter components in the wastewater are complex and highly dissolved, the organic matter components are difficult to effectively remove by a simple physical and chemical method, and some wastewater also contains polycyclic aromatic hydrocarbon, heterocyclic organic compounds, sulfides, nitrides and the like; thirdly, the color is high and the odor is generated. Some waste water emits pungent and foul odor, which causes adverse effects on the surrounding environment.
Because the waste water has great harm to water and ecological environment, different waste water treatment technologies and methods are intensively researched and tested aiming at different types of waste water, so that a good effect is achieved, and the waste water can be recycled or discharged after reaching the standard after being treated. However, most of the organic matters are volatile, and since the wastewater storage and treatment facility is directly communicated with the atmosphere, the volatile organic matters can escape into the air and pollute the atmospheric environment and the operating environment of the wastewater treatment station, so that sufficient attention and research have not been paid to the pollution emission at present, and therefore, a technical method for removing the volatile organic matters in the wastewater storage and treatment facility needs to be provided through research and experiments.
[ summary of the invention ]
The present invention is directed to overcoming the above-mentioned disadvantages of the prior art and providing a cover plate for removing volatile organic compounds in a wastewater storage and treatment facility and a method for manufacturing the same. The problem that volatile organic compounds are easily discharged into the air in waste water storage and treatment in the prior art is solved.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
a cover plate for removing volatile organic compounds in a wastewater storage and treatment facility comprises an upper layer framework and a lower layer framework which are connected, wherein the upper layer framework is arranged above the lower layer framework; a steel wire mesh is laid on the lower framework, and oleophylic materials are laid on the steel wire mesh; photocatalyst is filled in the upper layer framework and the oleophylic material;
the oleophylic material is modified polyurethane porous foam nickel, and ferric hydroxide colloid is attached to the pores of the modified polyurethane porous foam nickel; the photocatalyst is shell activated carbon loaded with nano titanium dioxide, and the nano titanium dioxide contains iron ions and tungsten ions.
The invention is further improved in that:
preferably, the upper layer framework and the lower layer framework are both framework structures, each framework structure is composed of unit grids in longitudinal array and transverse array, and the size of each unit grid is 60cm multiplied by 60 cm; the distance between the upper layer framework and the lower layer framework is 10-12 cm.
Preferably, the surface of the upper skeleton is covered with a transparent PVC sheet.
Preferably, an ultraviolet lamp is installed at one corner of the lower surface of the upper framework.
A method for manufacturing a cover plate for removing volatile organic compounds in a wastewater storage and treatment facility comprises the following steps: the upper layer framework and the lower layer framework are connected by welding, a steel wire mesh is laid on the lower layer framework, oleophylic materials are laid on the steel wire mesh, and photocatalysis materials are filled in gaps of the oleophylic materials and the upper layer framework.
Preferably, the preparation method of the oleophilic material comprises the following steps:
step 1, punching polyurethane porous foamed nickel to prepare a screen plate, and cutting the screen plate into a plurality of rectangular block-shaped polyurethane porous foamed nickel;
step 2, adding ferric chloride into an ammonia water solution with the mass concentration of 3-5% to prepare an ammonia water solution with the ferric chloride concentration of 10-15 mmol/L;
and 3, soaking the rectangular block-shaped polyurethane porous foam nickel in the solution obtained in the step 2, stirring after soaking, taking out, airing, drying the aired rectangular block-shaped polyurethane porous foam nickel until the surface is blackened, and continuously heating for 45-60min under the blackened state to prepare the oleophylic material.
Preferably, in the step 1, the hole diameter of the punched hole is 0.85mm-1.18 mm; in the step 3, the soaking time is 15-25min, the stirring speed after soaking is 60-90r/min, and the stirring time is 20 min.
Preferably, in the step 3, the drying temperature is 105 ℃ and the drying time is 2-3 h.
Preferably, the preparation process of the photocatalyst is as follows:
step 1, adding ferric trichloride and tungsten oxide into a hydrochloric acid solution with the concentration of 0.5-1% to prepare a mixed solution, wherein the concentration of the added ferric trichloride in the mixed solution is 0.02-0.03mol/L, and the concentration of the tungsten oxide is 0.01-0.015 mol/L;
step 2, mixing the nano titanium dioxide and the alcohol glue, uniformly stirring, soaking the shell activated carbon in the mixture for 2-3 hours, taking out the mixture, and airing the mixture to obtain the shell activated carbon attached with the nano titanium dioxide;
step 3, putting the shell activated carbon attached with the nano titanium dioxide obtained in the step 2 into the mixed solution obtained in the step 1, adding sodium hydroxide to adjust the whole solution to be neutral, and stirring for 40-50min to obtain a suspension;
and 4, filtering the suspension obtained in the step 3, putting filter residues in a drying box, heating and drying, taking out and cooling to obtain the photocatalyst.
Preferably, in the step 4, the drying temperature of the filter residue is 105 ℃, and the drying time is 2-3 h.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses a cover plate for removing volatile organic compounds in a wastewater storage and treatment facility, which is provided with a multilayer structure, oleophylic materials are arranged on the lower layer, and a photocatalyst is arranged on the upper layer, so that organic waste gas emitted from the wastewater treatment facility is enriched and intercepted by the oleophylic materials, and the intercepted and enriched organic gas is quickly degraded by adopting a photocatalytic technology, so that the organic gas dissipated to the air in a wastewater treatment system is removed, and the emission of the organic waste gas to the air in the wastewater treatment process is reduced. The test application shows that the waste gas treatment module is added in a waste water storage and treatment facility system, the amount of organic waste gas dissipated to the atmosphere is reduced by over 75 percent, the content of the organic waste gas in the dissipated gas accounts for less than 0.3 percent of the total gas amount, and the emission amount of the organic waste gas is greatly reduced.
The invention also discloses a manufacturing method of the cover plate for removing the volatile organic compounds in the wastewater storage and treatment facility, the method comprises the steps of paving a steel wire mesh on a lower layer framework of the cover plate, paving oleophylic materials on the steel wire mesh, and filling photocatalyst in gaps of the oleophylic materials and an upper layer framework, the method is a method for removing the volatile organic compounds in the high-concentration organic wastewater storage and treatment facility of petroleum and petrochemical enterprises, and the method adopts a foam material which is subjected to modification treatment and has super-hydrophobicity and super-oleophylic to enrich and intercept organic gas volatilized by the wastewater treatment facility; the adopted photocatalysis material is prepared by loading modified nano titanium dioxide on shell activated carbon, and efficiently degrading organic gas.
[ description of the drawings ]
FIG. 1 is a block diagram of the apparatus of the present invention;
wherein, 1-upper layer framework; 2-lower layer skeleton; 3-steel wire mesh; 4-a lipophilic material; 5-photocatalyst.
[ detailed description ] embodiments
The present invention is described in further detail below with reference to specific examples:
in the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and encompass, for example, both fixed and removable connections; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The invention discloses a cover plate for removing volatile organic compounds in a wastewater storage and treatment facility and a manufacturing method thereof, and the cover plate is a wastewater treatment tank cover plate and comprises an upper layer framework 1 and a lower layer framework 2, wherein the upper layer framework 1 and the lower layer framework 2 are both made of angle iron made of carbon steel materials, the upper layer framework 1 and the lower layer framework 2 which comprise a plurality of unit cells of 60cm multiplied by 60cm are welded according to the size of a wastewater storage and treatment tank, and the height between the upper layer framework 1 and the lower layer framework 2 is 10-12 cm. A steel wire mesh 3 is laid on the lower layer framework 2, and the prepared block-shaped oleophylic material 4 is loosely laid on the steel wire mesh 3; the photo-catalytic material 5 is filled in the framework of the upper layer framework 1 and the lower layer framework 2 and the gap of the block oleophylic material 4, and the surface of the upper layer framework 1 is covered or opened by a transparent PVC plate. An ultraviolet lamp 3 is arranged on the inner side of the angle iron of the lower layer framework 2, and the ultraviolet lamp 3 is turned on to provide a light source in rainy days or at night.
The manufacturing process of the structure comprises the following steps:
step 1, preparing oleophilic material
Step 1.1, a commercially available polyurethane porous nickel foam composite material plate is punched by using a needle type punching machine, and a screen plate (standard mesh number: 16 meshes-20 meshes) with the aperture of 0.85mm-1.18mm is divided into a plurality of blocks with the side length of 3cm and 5 cm.
Step 1.2, adding a certain amount of ferric chloride into the ammonia water solution with the concentration of 3-5%, stirring and dissolving to prepare the ammonia water solution with the ferric chloride concentration of 10-15 mmol/L.
Step 1.3, putting the composite foamed nickel prepared in the step 1.1 into the solution prepared in the step 1.2, soaking for 15-25min, then slowly stirring at a speed of 60-90r/min for 20min, taking out the foamed nickel, airing, putting into a heating furnace, heating to 105 ℃, keeping for 2-3h, and drying the foamed nickel; and continuously heating at the temperature until the surface of the foamed nickel begins to turn black, keeping for 45-60min, and taking out to obtain the lipophilic material required by the invention. In the step, the reaction product of ferric chloride and ammonia water, namely ferric hydroxide colloid, is uniformly covered and permeated in gaps of the foamed nickel material, the blackening of the surface of the foamed nickel indicates that unstable ferric hydroxide generates stable ferroferric oxide after dehydration, and the modified material has stable performance.
In the step, the polyurethane porous foam nickel composite material is modified to prepare the oleophylic material, so that the adsorption capacity of the oleophylic material on organic waste gas volatilized from wastewater is improved, the organic gas volatilized from the oily organic wastewater is fully enriched and intercepted, the adsorption area and the adsorption capacity are increased, and the treatment efficiency is improved.
Step 2, preparing a photocatalyst;
step 2.1, adding ferric trichloride (FeCl) into hydrochloric acid solution with concentration of 0.5-1%3) And tungsten oxide (WO)3) The addition amount is according to FeCl3The concentration is 0.02-0.03mol/L, WO3Measuring the concentration of 0.01-0.015mol/L, uniformly stirring the solution to prepare the Fe-containing material simultaneously3+、W6+The solution of (4) to prepare titanium dioxide containing metal ions such as iron, tungsten and the like according to the following steps.
And 2.2, adding commercially available nano titanium dioxide into the alcohol glue, uniformly stirring, preferably, the volume ratio is 1:1, soaking the shell activated carbon in the alcohol glue solution containing the nano titanium dioxide for 2-3 hours, taking out and airing.
And 2.3, putting the shell activated carbon obtained in the step 2.2 into the solution obtained in the step 1, adding sodium hydroxide with the mass concentration of 0.5-1.0% into the solution to adjust the whole solution to be neutral (pH is 7), and stirring for 40-50 min.
And 2.4, filtering the product obtained in the step 2.3, putting filter residues in a drying oven, heating to 105 ℃, keeping for 2-3 hours, and cooling to room temperature to obtain the photocatalyst required by the invention.
In the step, the shell activated carbon which can respond to ultraviolet light and visible light is loaded with nano titanium dioxide containing metal ions such as iron and tungsten, and the organic gases such as petroleum hydrocarbon and the like which are enriched and intercepted are subjected to a photocatalytic degradation technology, so that the shell activated carbon is loaded with the nano titanium dioxide containing the metal ions such as iron and tungsten.
And 3, placing the oleophylic material and the photocatalyst in the upper layer framework 1 and the lower layer framework 2.
The cover plate is covered on the wastewater treatment tank, overflowed gas is enriched and intercepted through oleophilic materials by means of natural force, and the gas is degraded under the catalytic action of a photocatalyst in the cover plate under the irradiation of ultraviolet light or visible light.
The structure mainly has two forms for removing organic matters:
(1) the waste gas dissipated in the waste water treatment facility passes through the oleophilic material and the photocatalytic material in turn at 5-45 ℃ under the irradiation of light (ultraviolet light or visible light);
(2) the waste gas dissipated from the waste water treatment facility passes through the mixed stack body of oleophilic material and photocatalytic material at 5-45 ℃ under the irradiation of light (ultraviolet light or visible light).
According to the principle of 'similar compatibility', after the modified lipophilic material, the gas of inorganic components in the volatile gas can freely pass through, and the organic gas is intercepted and adsorbed, thereby improving the efficiency of treating the organic waste gas. The oleophylic material plays a role in enriching and does not degrade the organic waste gas; photocatalysis is the decomposition and treatment of organic waste gas to change the organic waste gas into harmless components.
The cover plate is covered on the wastewater treatment tank, overflowed gas is enriched and intercepted through oleophilic materials by means of natural force, and the gas is degraded under the catalytic action of a photocatalyst in the cover plate under the irradiation of ultraviolet light or visible light.
Example (b):
in 2017, the technology is adopted to treat the waste gas of 4 waste water treatment stations aiming at the measure waste liquid containing petroleum and high molecular organic matters in an oil field operation station, the amount of the organic waste gas dissipated into the atmosphere is reduced by over 75 percent by detecting at the outlet of a treatment pool, the content of the organic waste gas in the dissipated gas accounts for less than 0.3 percent of the total gas amount, and the whole treatment station has no peculiar smell.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. The cover plate for removing volatile organic compounds in the wastewater storage and treatment facility is characterized by comprising an upper layer framework (1) and a lower layer framework (2) which are connected, wherein the upper layer framework (1) is arranged above the lower layer framework (2); a steel wire mesh (3) is laid on the lower layer framework (2), and oleophylic materials (4) are laid on the steel wire mesh (3); photocatalyst (5) is filled in the upper layer framework (1) and the oleophylic material (4);
the oleophylic material (4) is modified polyurethane porous foam nickel, and ferric hydroxide colloid is attached to the pores of the modified polyurethane porous foam nickel; the photocatalyst (5) is shell activated carbon loaded with nano titanium dioxide, and the nano titanium dioxide contains iron ions and tungsten ions.
2. The cover plate for removing volatile organic compounds in a wastewater storage and treatment facility according to claim 1, wherein the upper layer framework (1) and the lower layer framework (2) are both frame structures, the frame structures are composed of unit cells in longitudinal arrays and transverse arrays, and the size of the unit cell is 60cm x 60 cm; the distance between the upper layer framework (1) and the lower layer framework (2) is 10-12 cm.
3. The cover plate for removing volatile organic compounds in a wastewater storage and treatment facility according to claim 1, wherein the surface of the upper frame (1) is covered with a transparent PVC plate.
4. The cover plate for removing volatile organic compounds in a wastewater storage and treatment facility according to claim 1, wherein a uv lamp is installed at one corner of the lower surface of the upper frame (1).
5. A manufacturing method of a cover plate for removing volatile organic compounds in a wastewater storage and treatment facility is characterized by comprising the following steps: the upper layer framework (1) and the lower layer framework (2) are connected by welding, a steel wire mesh (3) is laid on the lower layer framework (2), oleophylic materials (4) are laid on the steel wire mesh (3), and photocatalysis materials (5) are filled in gaps of the oleophylic materials (4) and the upper layer framework (2).
6. A method for manufacturing a cover plate for removing volatile organic compounds in a wastewater storage and treatment facility according to claim 5, wherein the oleophilic material (4) is manufactured by the following method:
step 1, punching polyurethane porous foamed nickel to prepare a screen plate, and cutting the screen plate into a plurality of rectangular block-shaped polyurethane porous foamed nickel;
step 2, adding ferric chloride into an ammonia water solution with the mass concentration of 3-5% to prepare an ammonia water solution with the ferric chloride concentration of 10-15 mmol/L;
and 3, soaking the rectangular block-shaped polyurethane porous foam nickel in the solution obtained in the step 2, stirring after soaking, taking out, airing, drying the aired rectangular block-shaped polyurethane porous foam nickel until the surface is blackened, and continuously heating for 45-60min under the blackened state to prepare the oleophylic material.
7. The method of claim 6, wherein in step 1, the holes have a diameter of 0.85mm to 1.18 mm; in the step 3, the soaking time is 15-25min, the stirring speed after soaking is 60-90r/min, and the stirring time is 20 min.
8. The method as claimed in claim 6, wherein the drying temperature is 105 ℃ and the drying time is 2-3h in step 3.
9. The method for manufacturing a cover plate for removing volatile organic compounds in a wastewater storage and treatment facility according to claim 5, wherein the photocatalyst (5) is prepared by:
step 1, adding ferric trichloride and tungsten oxide into a hydrochloric acid solution with the concentration of 0.5-1% to prepare a mixed solution, wherein the concentration of the added ferric trichloride in the mixed solution is 0.02-0.03mol/L, and the concentration of the tungsten oxide is 0.01-0.015 mol/L;
step 2, mixing the nano titanium dioxide and the alcohol glue, uniformly stirring, soaking the shell activated carbon in the mixture for 2-3 hours, taking out the mixture, and airing the mixture to obtain the shell activated carbon attached with the nano titanium dioxide;
step 3, putting the shell activated carbon attached with the nano titanium dioxide obtained in the step 2 into the mixed solution obtained in the step 1, adding sodium hydroxide to adjust the whole solution to be neutral, and stirring for 40-50min to obtain a suspension;
and 4, filtering the suspension obtained in the step 3, putting filter residues in a drying box, heating and drying, taking out and cooling to obtain the photocatalyst (5).
10. The method as claimed in claim 9, wherein the step 4 is carried out at a drying temperature of 105 ℃ for 2-3 h.
CN202011176729.6A 2020-10-28 2020-10-28 Cover plate for removing volatile organic compounds in wastewater storage and treatment facility and manufacturing method thereof Active CN112387110B (en)

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WO2023047147A1 (en) * 2021-09-21 2023-03-30 Ignasi Clotet S.L.U. A method for treating gases emitted by wastewater and corresponding method for treating wastewater

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CN105854414A (en) * 2016-03-31 2016-08-17 上海市凌桥环保设备厂有限公司 Composite filter material for air purifier and a preparation method thereof
CN106423299A (en) * 2016-11-18 2017-02-22 陕西盛迈石油有限公司 Preparation method for functional foam carbon for photo-catalytically degrading formaldehyde
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CN104815483A (en) * 2015-04-20 2015-08-05 上海洁晟环保科技有限公司 Composite anti-microbial air filtration material, preparation method and application
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023047147A1 (en) * 2021-09-21 2023-03-30 Ignasi Clotet S.L.U. A method for treating gases emitted by wastewater and corresponding method for treating wastewater

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