CN115636398A - Waste phosphoric acid treatment process - Google Patents
Waste phosphoric acid treatment process Download PDFInfo
- Publication number
- CN115636398A CN115636398A CN202211121254.XA CN202211121254A CN115636398A CN 115636398 A CN115636398 A CN 115636398A CN 202211121254 A CN202211121254 A CN 202211121254A CN 115636398 A CN115636398 A CN 115636398A
- Authority
- CN
- China
- Prior art keywords
- waste liquid
- phosphoric acid
- storage tank
- pressure pump
- waste
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention discloses a waste phosphoric acid treatment process, which comprises a precision filter, a micro-filtration tank, a resin filtration tank and a nanofiltration membrane, wherein phosphoric acid waste liquid is subjected to filtration with different functions in batches through the precision filter, the micro-filtration tank, the resin filtration tank and the nanofiltration membrane, so that the filtration effect is better, the phosphoric acid waste liquid is heated in a first stainless steel heat exchanger and a second stainless steel heat exchanger, and an ultraviolet sterilizer is used for sterilization treatment while heating, so that the filtration effect of the waste liquid is improved in the filtration process of the resin filtration tank and the nanofiltration membrane, and the recovery rate and the recovery efficiency of the waste phosphoric acid are improved.
Description
Technical Field
The invention relates to the technical field of chemical waste recovery treatment, in particular to a waste phosphoric acid treatment process.
Background
Phosphoric acid, also known as orthophosphoric acid, is a common inorganic acid, is not easily volatilized, is not easily decomposed, has almost no oxidation, is mainly used in the industries of pharmacy, food, fertilizer and the like, and comprises the raw materials of antirust agents, food additives, dentistry and orthopedic surgery, EDIC corrosive agents, electrolytes, soldering fluxes, dispersing agents, industrial corrosive agents, fertilizers and component household cleaning products, and can also be used as chemical agents.
Phosphoric acid is widely used as a chemical raw material in various industries, but the residual phosphoric acid waste liquid after normal use or the phosphoric acid waste liquid obtained after other reactions is subjected to harmless treatment, the most common phosphoric acid treatment is an acid concentration and purification process at present, for example, CN202020386288.1 discloses a clean and efficient phosphoric acid recovery system, although the equipment investment and the personnel expenditure can be reduced, the recovery efficiency is not high, most of the recovery is performed by adopting a chemical neutralization method, and the used medicament can affect the surrounding environment and is not paid.
Disclosure of Invention
In view of the above situation, the present invention provides a waste phosphoric acid treatment process, which has high recovery rate and recovery efficiency and less influence on the surrounding environment.
In order to achieve the purpose, the invention provides the following technical scheme: the invention provides a waste phosphoric acid treatment process, which comprises the following steps:
a. conveying the residual waste phosphoric acid to a waste phosphoric acid mixing tank for storage through a pipeline;
b. then the waste liquid is pressurized by a first pressure pump so that the waste liquid is conveyed into a precision filter through a pipeline for filtering treatment;
c. after being filtered by a precise filter, the waste liquid is conveyed to a first storage tank through a pipeline for storage, then the waste liquid is conveyed to a first stainless steel heat exchanger through the pipeline for heating treatment through the pressurization of a second pressure pump, and an ultraviolet sterilizer is used for sterilizing the waste liquid while heating;
d. after being heated by a first stainless steel heat exchanger, the mixture is conveyed into a pair of microfiltration tanks through a pipeline for microfiltration treatment, and after microfiltration treatment, the mixture enters the microfiltration storage tank for temporary storage;
e. then, the waste liquid enters the three resin filtering tanks from the microfiltration storage tank through pipelines by the pressurization of a third pressure pump and is filtered by resin, and tap water and hydrochloric acid are added in the filtering process of the three resin filtering tanks to increase the filtering effect;
f. after being filtered by the resin filter tank, the waste liquid enters a second storage tank through a pipeline for storage, then a part of the waste liquid enters a second stainless steel heat exchanger through a fourth pressure pump for heating treatment, an ultraviolet sterilizer is used for sterilizing the waste liquid while heating, and the waste liquid after being heated in the second stainless steel heat exchanger returns to the second storage tank for circular heating again;
g. pressurizing the other part of the heated waste liquid in the second storage tank by a fifth pressure pump and a sixth pressure pump, and conveying the waste liquid into the two nanofiltration membranes for filtering again;
h. and the concentrated solution is filtered by two nanofiltration membranes, then is subjected to water permeation and concentrated solution discharge through two pipelines, and is discharged and then enters a phosphoric acid recovery storage tank for collection and storage.
The invention has the beneficial effects that: according to the invention, phosphoric acid waste liquid is filtered in different functions in batches through the precision filter, the microfiltration tank, the resin filtering tank and the nanofiltration membrane, so that the filtering effect is better, the phosphoric acid waste liquid is heated in the first stainless steel heat exchanger and the second stainless steel heat exchanger, and the ultraviolet sterilizer is used for sterilization treatment while heating, so that the filtering effect of the phosphoric acid waste liquid is improved in the filtering process of the resin filtering tank and the nanofiltration membrane, and the recovery rate and the recovery efficiency of the waste phosphoric acid are improved.
Drawings
FIG. 1 is a process flow diagram of the waste phosphoric acid treatment process of the present invention.
In fig. 1: 1-waste phosphoric acid mixing tank, 2-first pressure pump, 3-precision filter, 4-first storage tank, 5-ultraviolet sterilizer, 6-first stainless steel heat exchanger, 7-second pressure pump, 8-micro-filtration tank, 9-micro-filtration storage tank, 10-third pressure pump, 11-resin filtration tank, 12-second storage tank, 13-fourth pressure pump, 14-second stainless steel heat exchanger, 15-fifth pressure pump, 16-sixth pressure pump, 17-nanofiltration membrane, 18-phosphoric acid recovery storage tank.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following embodiments or the description in the prior art will be briefly introduced, and it is obvious that the following descriptions are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other embodiments according to these embodiments without creative efforts.
A waste phosphoric acid treatment process comprises the following steps:
a. conveying the residual waste phosphoric acid to a waste phosphoric acid mixing tank 1 by a pipeline for storage;
b. then the waste liquid is pressurized by the first pressure pump 2 to be conveyed into the precision filter 3 through a pipeline for filtering treatment;
c. the waste liquid is filtered by the precision filter 3 and then is conveyed to a first storage tank 4 through a pipeline for storage, then the waste liquid is conveyed to a first stainless steel heat exchanger 6 through a pipeline for heating treatment through the pressurization of a second pressure pump 7, and the waste liquid is sterilized by an ultraviolet sterilizer 5 while being heated;
d. after being heated by the first stainless steel heat exchanger 6, the mixture is conveyed into a pair of microfiltration tanks 8 through a pipeline for microfiltration treatment, and after the microfiltration treatment, the mixture enters a microfiltration storage tank 9 for temporary storage;
e. then, the waste liquid enters the three resin filter tanks 11 from the microfiltration storage tank 9 through pipelines to be filtered by resin through the pressurization of the third pressure pump 10, and tap water and hydrochloric acid are added in the filtering process of the three resin filter tanks 11 to increase the filtering effect;
f. after being filtered by the resin filter tank 11, the waste liquid enters a second storage tank 12 through a pipeline for storage, then a part of the waste liquid enters a second stainless steel heat exchanger 14 through a fourth pressure pump 13 for heating treatment, the waste liquid is sterilized by using an ultraviolet sterilizer 5 while being heated, and the waste liquid after being heated in the second stainless steel heat exchanger 14 returns to the second storage tank 12 for circular heating again;
g. the other part of the heated waste liquid in the second storage tank 12 is pressurized by a fifth pressure pump 15 and a sixth pressure pump 16 and then is conveyed into two nanofiltration membranes 17 for secondary filtration;
h. and the concentrated solution enters two nanofiltration membranes 17 for filtration, then is subjected to water permeation and concentrated solution discharge through two pipelines, and then enters a phosphoric acid recovery storage tank 18 for collection and storage after being discharged.
The shell of the precision filter cylinder is generally made of stainless steel, tubular filter elements such as PP melt-blown filter elements, wire-fired filter elements, folded filter elements, titanium filter elements, activated carbon filter elements and the like are adopted as filter elements inside the precision filter cylinder, different filter elements are selected according to different filter media and design processes so as to meet the requirements of effluent quality, the precision filter cylinder is used for solid-liquid separation of various suspensions, has higher environmental requirements and higher filtration precision, is wide in application range, and is suitable for the industrial fields of medicines, foods, chemical industry, environmental protection, water treatment and the like.
The ion exchange resin recovers the waste acid liquor; the pickling tank can continuously remove metal ions, supplement concentrated acid, ensure the acid concentration in the pickling tank, improve the pickling speed, ensure the product quality, realize full-automatic control, reduce the workload and the acid consumption, reduce the alkali consumption and the sludge production of pickling wastewater treatment, realize low daily operation cost, and only consume one ton of pure water and one degree of electricity for each ton of waste acid treatment.
The first stainless steel heat exchanger 6 and the second stainless steel heat exchanger 14 heat the waste liquid, wherein the heating mode is that steam is added into the stainless steel heat exchanger, and the second stainless steel heat exchanger 14 is added with the steam and tap water.
The nanofiltration membrane has a pore diameter of 1nm or more, generally 1-2nm. Is a functional semi-permeable membrane that allows the passage of solvent molecules or certain low molecular weight solutes or low valent ions. It is a special and promising separation membrane variety, its name is that it can retain the size of matter about nanometer, its molecular weight for retaining organic matter is about 150-500, and its capacity for retaining soluble salt is 2-98%, and the desalination of monovalent anion salt solution is less than that of high-valence anion salt solution. Is used for removing organic matters and chromaticity of surface water, removing hardness of underground water, partially removing soluble salt, concentrating fruit juice and separating useful substances in medicines.
Other valves and meters are conventional in the art.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (1)
1. The waste phosphoric acid treatment process is characterized by comprising the following steps of:
a. conveying the residual waste phosphoric acid to a waste phosphoric acid mixing tank for storage through a pipeline;
b. then the waste liquid is pressurized by a first pressure pump so that the waste liquid is conveyed into a precision filter through a pipeline for filtering treatment;
c. after being filtered by a precise filter, the waste liquid is conveyed to a first storage tank through a pipeline for storage, then the waste liquid is conveyed to a first stainless steel heat exchanger through the pipeline for heating treatment through the pressurization of a second pressure pump, and an ultraviolet sterilizer is used for sterilizing the waste liquid while heating;
d. after being heated by a first stainless steel heat exchanger, the mixture is conveyed into a pair of microfiltration tanks through a pipeline for microfiltration treatment, and after microfiltration treatment, the mixture enters the microfiltration storage tank for temporary storage;
e. then, the waste liquid enters the three resin filtering tanks from the microfiltration storage tank through pipelines by the pressurization of a third pressure pump and is filtered by resin, and tap water and hydrochloric acid are added in the filtering process of the three resin filtering tanks to increase the filtering effect;
f. after being filtered by the resin filter tank, the waste liquid enters a second storage tank through a pipeline for storage, then a part of the waste liquid enters a second stainless steel heat exchanger through a fourth pressure pump for heating treatment, an ultraviolet sterilizer is used for sterilizing the waste liquid while heating, and the waste liquid after being heated in the second stainless steel heat exchanger returns to the second storage tank for circular heating again;
g. pressurizing the other part of the heated waste liquid in the second storage tank by a fifth pressure pump and a sixth pressure pump, and conveying the waste liquid into the two nanofiltration membranes for filtering again;
h. and after the concentrated solution is filtered by the two nanofiltration membranes, the concentrated solution is respectively subjected to permeation water discharge and concentrated solution discharge through two pipelines, and the concentrated solution is discharged and then enters a phosphoric acid recovery storage tank for collection and storage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211121254.XA CN115636398A (en) | 2022-09-15 | 2022-09-15 | Waste phosphoric acid treatment process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211121254.XA CN115636398A (en) | 2022-09-15 | 2022-09-15 | Waste phosphoric acid treatment process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115636398A true CN115636398A (en) | 2023-01-24 |
Family
ID=84942681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211121254.XA Pending CN115636398A (en) | 2022-09-15 | 2022-09-15 | Waste phosphoric acid treatment process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115636398A (en) |
-
2022
- 2022-09-15 CN CN202211121254.XA patent/CN115636398A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Wenten | Reverse osmosis applications: Prospect and challenges | |
| Huang et al. | Application of membrane technology on semiconductor wastewater reclamation: A pilot-scale study | |
| Juang et al. | Membrane processes for water reuse from the effluent of industrial park wastewater treatment plant: a study on flux and fouling of membrane | |
| Hamid et al. | Comparison of the effects of ozone, biological activated carbon (BAC) filtration and combined ozone-BAC pre-treatments on the microfiltration of secondary effluent | |
| CN105236661B (en) | The system and method for preparing ultra-pure water of no effuent discharge | |
| CN101643284A (en) | Reverse osmosis water treatment method and equipment with high desalination and high water productivity | |
| CN108046482A (en) | A kind of organic concentration wastewater treatment method of high salinity high rigidity difficult degradation and system | |
| CN102815833A (en) | Membrane-process treatment and reusing technique for oxalic production wastewater containing nitric acid | |
| CN103896437A (en) | Zero emission treatment process of high-salinity wastewater | |
| CN101781048A (en) | Low ammonia nitrogen waste water treatment and recycling method | |
| CN205188052U (en) | Former pretreatment of water and demineralizer | |
| CN104291516A (en) | Oil refining and chemical sewage processing and recovering equipment and method thereof | |
| CN112624451A (en) | Photocatalytic multistage membrane separation coupling sewage treatment system | |
| CN115636398A (en) | Waste phosphoric acid treatment process | |
| CN205556296U (en) | Water treatment system | |
| CN207845415U (en) | A kind of pharmaceutical bipolar reverse osmosis equipment | |
| CN208561963U (en) | A kind of processing unit of the reverse osmosis concentrated liquid of low cost | |
| Tharayil et al. | Environmental sustainability of FO membrane separation applications–Bibliometric analysis and state-of-the-art review | |
| CN109205944A (en) | A kind of pharmacy waste water divides salt processing method | |
| CN211394158U (en) | Electroplating effluent zero release sewage treatment plant | |
| CN103127833A (en) | Nanofiltration membrane system applied to fermented liquid purification | |
| CN204625401U (en) | A kind of pure water plenum system for pharmaceutical production | |
| CN113493278A (en) | Membrane reactor system for preparing polyaluminum chloride from aluminum-containing wastewater | |
| JP2011218267A (en) | Water processing method and water processing device | |
| CN112225393A (en) | Reclaimed water recycling system and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |