CN113787088A - CVD dust treatment method - Google Patents
CVD dust treatment method Download PDFInfo
- Publication number
- CN113787088A CN113787088A CN202111269251.6A CN202111269251A CN113787088A CN 113787088 A CN113787088 A CN 113787088A CN 202111269251 A CN202111269251 A CN 202111269251A CN 113787088 A CN113787088 A CN 113787088A
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- Prior art keywords
- cvd
- dust
- mother liquor
- content
- mixed liquid
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- 239000000428 dust Substances 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 30
- 239000012452 mother liquor Substances 0.000 claims abstract description 25
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 16
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 16
- 239000004571 lime Substances 0.000 claims abstract description 16
- 239000000706 filtrate Substances 0.000 claims abstract description 11
- 239000002910 solid waste Substances 0.000 claims abstract description 5
- 239000000126 substance Substances 0.000 claims abstract description 5
- 238000000926 separation method Methods 0.000 claims abstract description 4
- 238000003672 processing method Methods 0.000 claims description 11
- 229910052731 fluorine Inorganic materials 0.000 claims description 8
- 239000011737 fluorine Substances 0.000 claims description 8
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 6
- -1 fluorine ions Chemical class 0.000 claims description 5
- 239000011259 mixed solution Substances 0.000 claims description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 3
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 3
- 239000011575 calcium Substances 0.000 claims description 3
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- 238000002386 leaching Methods 0.000 claims description 3
- 239000011591 potassium Substances 0.000 claims description 3
- 229910052700 potassium Inorganic materials 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 239000011734 sodium Substances 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 claims description 3
- 230000001988 toxicity Effects 0.000 claims description 3
- 231100000419 toxicity Toxicity 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 2
- 238000001704 evaporation Methods 0.000 claims description 2
- 239000007787 solid Substances 0.000 abstract description 6
- 239000002699 waste material Substances 0.000 abstract description 6
- 239000002245 particle Substances 0.000 abstract description 3
- 239000002440 industrial waste Substances 0.000 abstract description 2
- 238000011085 pressure filtration Methods 0.000 abstract description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 27
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 3
- 229910001424 calcium ion Inorganic materials 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
Abstract
The invention relates to the technical field of industrial waste treatment, in particular to a CVD dust treatment method, which has the technical scheme key points that: comprises the following steps; step 1, obtaining mother liquor, lime and CVD dust. And 2, adding the lime into the mother liquor to form primary mixed liquor. And 3, adding the CVD dust into the primary mixed liquid to form a secondary mixed liquid. And 4, carrying out pressure filtration and separation on the secondary mixed liquid to obtain filtrate and filter residue. And 5, carrying out physical and chemical treatment on the filtrate, and burying the filter residue. The mother liquor is prepared from leachate of industrial solid waste safe landfill, so that waste is treated by waste, the utilization rate of resources is improved, the CVD dust is converted from a particle state into a harmless liquid state and a harmless solid state, subsequent harmless treatment is facilitated, the pollution of a traditional mode to the environment is avoided, and the cost for treating waste is reduced.
Description
Technical Field
The invention relates to the technical field of industrial waste treatment, in particular to a CVD dust treatment method.
Background
CVD (chemical vapor deposition) is a technique in which a chemical substance in a gaseous or vapor state is chemically reacted at a gas-phase or gas-solid interface in a reactor by means of a chemical reaction using various energy sources such as heating, plasma excitation, or light irradiation to form a solid deposit. The form of solids precipitated from the gas phase is mainly the following: thin films, whiskers and grains are formed on the surface of a solid body, and particles are formed in a gas.
CVD can produce a large amount of dust, and at present, the treatment of CVD dust is mainly buried, but CVD dust can produce a large amount of raise dust in the process of burying, causing pollution to air, and CVD dust can react with substances in soil, and causing deterioration to local environment.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a CVD dust treatment method, which can carry out harmless treatment on CVD dust and has the advantages of reducing cost and protecting environment.
The technical purpose of the invention is realized by the following technical scheme: a CVD dust processing method includes the following steps;
step 1, obtaining mother liquor, lime and CVD dust;
step 2, adding the lime into the mother liquor to form primary mixed liquor;
step 3, adding the CVD dust into the primary mixed solution to form a secondary mixed solution;
step 4, performing filter pressing and separation on the secondary mixed liquid to obtain filtrate and filter residue;
and 5, carrying out physical and chemical treatment on the filtrate, and burying the filter residue.
In one embodiment, the step 1 comprises the following steps;
and (3) pretreating and evaporating leachate of the industrial solid waste safe landfill to obtain the mother liquor.
In one embodiment, the COD content in the mother liquor is 2.98X 103mg/L, ammonia nitrogen content of 194mg/L, potassium content of 6.42 multiplied by 103mg/L, sodium content 2.92X 104mg/L, calcium content 6.58X 104mg/L。
In one embodiment, the content of fluorine in the CVD dust is 40%, and the content of fluorine ions detected by leaching toxicity is 5.88 x 104mg/L, ammonia nitrogen content of 1.14 multiplied by 104mg/L。
In one embodiment, the mass ratio of the mother liquor to the lime in the step 2 is 10: 1.
In one embodiment, the pH value of the primary mixed liquor is more than 10.
In one embodiment, the mass ratio of the primary mixed liquid to the CVD dust in step 3 is 10: 1.
In one embodiment, the pH value of the secondary mixed liquid is more than 7.
In one embodiment, the fluoride content in the secondary mixed liquid is less than 20 mg/L.
The CVD dust treatment method has the following beneficial effects:
in the invention, the mother liquor is prepared from leachate of an industrial solid waste safe landfill, so that waste is treated by waste, the utilization rate of resources is improved, CVD dust is converted from a particle state into a harmless liquid state and a harmless solid state, the subsequent harmless treatment is facilitated, the pollution of the traditional mode to the environment is avoided, and the cost for treating waste is reduced.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
A CVD dust processing method, as shown in FIG. 1, includes the following steps;
step 1, obtaining mother liquor, lime and CVD dust;
the leachate of the industrial solid waste safety landfill is pretreated and evaporated to obtain the mother liquor; the COD content in the mother liquor is 2.98 multiplied by 103mg/L, ammonia nitrogen content of 194mg/L, potassium content of 6.42 multiplied by 103mg/L, sodium content 2.92X 104mg/L, calcium content 6.58X 104mg/L. The content of fluorine in the CVD dust is 40%, and the content of fluorine ions in the CVD dust is 5.88 multiplied by 10 in the detection of leaching toxicity4mg/L, ammonia nitrogen content of 1.14 multiplied by 104mg/L。
And 2, adding the lime into the mother liquor to form primary mixed liquor. Wherein the mass ratio of the mother liquor to the lime is 10: 1. The pH value of the primary mixed liquid is more than 10.
Pouring a certain amount of mother liquor into the dispensing pool, slowly adding lime into the mother liquor according to the mass ratio of 10:1, fully dissolving the lime into the mother liquor, fully mixing the lime and the mother liquor to form primary mixed liquor, wherein the pH value of the primary mixed liquor is greater than 10 and the primary mixed liquor is alkaline liquid.
And 3, adding the CVD dust into the primary mixed liquid to form a secondary mixed liquid. The mass ratio of the primary mixed liquid to the CVD dust in the step 3 is 10: 1. The pH value of the secondary mixed liquid is more than 7. The fluoride content in the secondary mixed liquid is less than 20 mg/L.
Slowly adding the CVD dust into the primary mixed liquid and stirring, specifically, fully mixing and stirring the mixture at the rotating speed: 33.5r/min, at the moment, the CVD dust can be added only when the pH value of the primary mixed solution is more than 7, so that the CVD dust is prevented from being acidic when meeting water, generating corrosive hydrofluoric acid mist easily and being blocked and settled, and not being beneficial to full reaction treatment; meanwhile, ammonia is easy to volatilize under the alkaline condition, and the ammonia can be treated by using a gas treatment system.
The mass ratio of the mother liquor amount to the lime amount to the CVD dust in the secondary mixed liquor is approximately 10:1: 1. And detecting the pH value of the secondary mixed liquid, adding lime slurry if the secondary mixed liquid is acidic or neutral, quickly detecting the content of fluorine ions in the secondary mixed liquid if the secondary mixed liquid is alkaline, and transferring the secondary mixed liquid to the next procedure for treatment if the content of the fluorine ions is lower than 20 mg/L.
And 4, carrying out pressure filtration and separation on the secondary mixed liquid to obtain filtrate and filter residue.
And pouring the secondary mixed liquid into a filter press, carrying out filter pressing on the secondary mixed liquid by the filter press to obtain filtrate and filter residues, and carrying out landfill treatment on the filter residues.
Detecting the concentration of calcium ion in the filtrate, if the concentration of calcium ion is lower than 4.34 × 103At mg/L, performing physicochemical treatment on the filtrate; if the concentration of calcium ion is higher than or equal to 4.34X 103At mg/L, the filtrate is poured into a medicine preparation pool and used as mother liquor for repeated use
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A CVD dust processing method is characterized in that: comprises the following steps;
step 1, obtaining mother liquor, lime and CVD dust;
step 2, adding the lime into the mother liquor to form primary mixed liquor;
step 3, adding the CVD dust into the primary mixed solution to form a secondary mixed solution;
step 4, performing filter pressing and separation on the secondary mixed liquid to obtain filtrate and filter residue;
and 5, carrying out physical and chemical treatment on the filtrate, and burying the filter residue.
2. A CVD dust processing method according to claim 1, characterized in that: the step 1 comprises the following steps;
and (3) pretreating and evaporating leachate of the industrial solid waste safe landfill to obtain the mother liquor.
3. According toA CVD dust processing method according to claim 1, wherein: the COD content in the mother liquor is 2.98 multiplied by 103mg/L, ammonia nitrogen content of 194mg/L, potassium content of 6.42 multiplied by 103mg/L, sodium content 2.92X 104mg/L, calcium content 6.58X 104mg/L。
4. A CVD dust processing method according to claim 1, characterized in that: the content of fluorine in the CVD dust is 40%, and the content of fluorine ions in the CVD dust is 5.88 multiplied by 10 in the detection of leaching toxicity4mg/L, ammonia nitrogen content of 1.14 multiplied by 104mg/L。
5. A CVD dust processing method according to claim 1, characterized in that: the mass ratio of the mother liquor to the lime in the step 2 is 10: 1.
6. A CVD dust processing method according to claim 1, characterized in that: the pH value of the primary mixed liquid is more than 10.
7. A CVD dust processing method according to claim 1, characterized in that: the mass ratio of the primary mixed liquid to the CVD dust in the step 3 is 10: 1.
8. A CVD dust processing method according to claim 1, characterized in that: the pH value of the secondary mixed liquid is more than 7.
9. A CVD dust processing method according to claim 1, characterized in that: the fluoride content in the secondary mixed liquid is less than 20 mg/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111269251.6A CN113787088A (en) | 2021-10-29 | 2021-10-29 | CVD dust treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111269251.6A CN113787088A (en) | 2021-10-29 | 2021-10-29 | CVD dust treatment method |
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| Publication Number | Publication Date |
|---|---|
| CN113787088A true CN113787088A (en) | 2021-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111269251.6A Pending CN113787088A (en) | 2021-10-29 | 2021-10-29 | CVD dust treatment method |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000135480A (en) * | 1998-10-30 | 2000-05-16 | Mitsui Mining & Smelting Co Ltd | Treatment of residue |
| CN1404529A (en) * | 2000-02-23 | 2003-03-19 | 李库帕克公司 | Method for upgrading steel plant dust |
| CN1817518A (en) * | 2006-03-10 | 2006-08-16 | 同济大学 | Production of metal zinc powder from zinc dust and zinc dross |
| CN101186408A (en) * | 2007-12-11 | 2008-05-28 | 南京大学 | Method for removing ammonia and nitrogen in garbage percolate |
| CN105293564A (en) * | 2015-10-05 | 2016-02-03 | 李果 | Method for recycling zinc-containing dust ash in steel plant |
| CN106268643A (en) * | 2016-09-09 | 2017-01-04 | 北京神雾环境能源科技集团股份有限公司 | The Application way of calcium carbide furnace gas dust |
| CN211848090U (en) * | 2020-04-02 | 2020-11-03 | 上海环境工程设计研究院有限公司 | Zinc-containing dust wet recovery system |
| CN112830496A (en) * | 2020-12-30 | 2021-05-25 | 惠州Tcl环境科技有限公司 | Method for co-processing and recycling waste FCC catalyst and CVD dust |
-
2021
- 2021-10-29 CN CN202111269251.6A patent/CN113787088A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000135480A (en) * | 1998-10-30 | 2000-05-16 | Mitsui Mining & Smelting Co Ltd | Treatment of residue |
| CN1404529A (en) * | 2000-02-23 | 2003-03-19 | 李库帕克公司 | Method for upgrading steel plant dust |
| CN1817518A (en) * | 2006-03-10 | 2006-08-16 | 同济大学 | Production of metal zinc powder from zinc dust and zinc dross |
| CN101186408A (en) * | 2007-12-11 | 2008-05-28 | 南京大学 | Method for removing ammonia and nitrogen in garbage percolate |
| CN105293564A (en) * | 2015-10-05 | 2016-02-03 | 李果 | Method for recycling zinc-containing dust ash in steel plant |
| CN106268643A (en) * | 2016-09-09 | 2017-01-04 | 北京神雾环境能源科技集团股份有限公司 | The Application way of calcium carbide furnace gas dust |
| CN211848090U (en) * | 2020-04-02 | 2020-11-03 | 上海环境工程设计研究院有限公司 | Zinc-containing dust wet recovery system |
| CN112830496A (en) * | 2020-12-30 | 2021-05-25 | 惠州Tcl环境科技有限公司 | Method for co-processing and recycling waste FCC catalyst and CVD dust |
Non-Patent Citations (1)
| Title |
|---|
| 曾郴林, 中国环境出版社, pages: 954 * |
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