CN210945205U - A acid waste water recovery system for titanium white powder production process - Google Patents
A acid waste water recovery system for titanium white powder production process Download PDFInfo
- Publication number
- CN210945205U CN210945205U CN201921868419.3U CN201921868419U CN210945205U CN 210945205 U CN210945205 U CN 210945205U CN 201921868419 U CN201921868419 U CN 201921868419U CN 210945205 U CN210945205 U CN 210945205U
- Authority
- CN
- China
- Prior art keywords
- pipeline
- nanofiltration
- tank
- acid
- inlet
- 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.)
- Active
Links
Images
Abstract
An acid wastewater recovery system for a titanium dioxide production process comprises a microporous filtration system, a clear solution tank, a security filter, a nanofiltration membrane system, a nanofiltration concentrated water tank, a post-nanofiltration sulfuric acid tank, an MVR evaporation concentration system, a concentrated acid tank and a condensate water tank. The utility model discloses in, titanium dioxide acid waste water is through the millipore filtration system, the separation of small solid particle has been realized, the steady operation of receiving the filter membrane has been guaranteed, useless waste water has realized the separation of divalent ion and univalent ion more than divalent and after receiving the filter membrane, ferric separation has been realized, MVR evaporation concentration system is through preheating, evaporation, concentrated sulphuric acid that makes the low concentration returns production system from concentration 5~10% to 35~55%, millipore filtration system has realized the recovery of titanium and the purification of waste water, receive the filter membrane system and realized the separation of iron, the purification of sulphuric acid, MVR evaporation concentration system has realized the improvement of sulphuric acid concentration, the retrieval and utilization of evaporation condensate water. The whole wastewater recovery degree is high, and the environment is friendly.
Description
Technical Field
The utility model belongs to titanium white powder production facility field, concretely relates to an acid waste water recovery system for titanium white powder production process.
Background
Titanium dioxide, commonly known as titanium dioxide, is a white inorganic pigment. Titanium dioxide has strong adhesion and is not easy to change chemically, and is widely applied to the industrial fields of paint, plastics, paper making, printing ink, chemical fiber, rubber, cosmetics and the like.
In the production process of industrial sulfuric acid method titanium dioxide, a large amount of acidic wastewater, particularly acidic wastewater with the acid concentration of 5-10%, is produced, the output of each ton of titanium dioxide is 10-20 tons, the acidic wastewater contains a large amount of ferrous sulfate due to low acid concentration, the ferrous sulfate content is 0.25-0.5% calculated by elementary substance iron, each ton of titanium dioxide can produce 0.3-0.4 ton of ferrous sulfate and finally precipitate along with the wastewater, and iron resources are not reasonably utilized.
In the current acidic wastewater treatment, the acidic wastewater is neutralized by lime or carbide slag, although the problem of acidity of the acidic wastewater is solved by the neutralization treatment, a large amount of gypsum is generated in the neutralization process, and 3-5 tons of gypsum with 50% of water are generated in each ton of titanium dioxide finished products. The gypsum is red in appearance due to the fact that the gypsum contains a large amount of iron ions, cannot be used industrially due to high impurity content and high water content, can be only treated in a landfill mode, occupies a large amount of land cultivated land resources, not only is a large amount of land waste caused, but also a large amount of sulfur, calcium and iron resources are wasted, particularly, a part of heavy metals in titanium gypsum neutralized by carbide slag exist, hidden dangers of polluting underground water sources exist, the stacked red gypsum becomes an environmental protection department along with tightening of national environmental protection policies, and is a key point of attention of people, and meanwhile, the health continuous development of people industry and enterprises is restricted.
Therefore, based on the problems, the application further researches and improves the acid wastewater recovery system in the titanium dioxide production process in the prior art, and has the advantages of environmental friendliness and high quality of recovered products.
SUMMERY OF THE UTILITY MODEL
To not enough among the prior art, the utility model provides an acid waste water recovery system for titanium white powder production process adopts microporous filtration system, receives and strains membrane system, MVR evaporative concentration system, wholly carries out segmentation treatment, organic combination, and waste water recovery degree is high, and environment-friendly.
In order to solve the above technical problem, the present invention solves the above technical problems.
An acid wastewater recovery system for the production process of titanium dioxide comprises a microporous filtration system, a clear solution tank, a security filter, a nanofiltration membrane system, a nanofiltration concentrated water tank, a post-nanofiltration sulfuric acid tank, an MVR evaporation concentration system, a concentrated acid tank and a condensed water tank; the inlet of the microporous filtering system is used for receiving wastewater, the liquid outlet of the microporous filtering system is connected to the inlet of the clear liquid tank through a pipeline, and the thick pulp generated by the microporous filtering system returns to the titanium dioxide production system through a pipeline; the outlet of the clear liquid tank is connected to the inlet of the security filter through a pipeline, and an intermediate pump is arranged on the pipeline; the outlet of the security filter is connected to the inlet of the nanofiltration membrane system through a pipeline, and a nanofiltration high-pressure pump is arranged on the pipeline; a concentrated water outlet of the nanofiltration membrane system is connected to an inlet of a nanofiltration concentrated water tank through a pipeline, and a clear liquid outlet of the nanofiltration membrane system is connected to an inlet of a post-nanofiltration sulfuric acid tank through a pipeline; an outlet of the nanofiltration sulfuric acid tank is connected to an inlet of an MVR evaporation concentration system through a pipeline, and an MVR concentration feed pump is arranged on the pipeline; a discharge port of the MVR evaporation concentration system is connected to an inlet of the concentrated acid tank through a pipeline, and an MVR concentration discharge pump is arranged on the pipeline; and a condensation water port of the MVR evaporation concentration system is connected to an inlet of the condensation water tank through a pipeline.
In the acid waste water recovery system in this application, the combined system of the concentrated waste water recovery processing of system + nanofiltration membrane system + MVR evaporation has been crossed to the micropore, the drawback of the unable steady operation of conventional milipore filter easy jam has not only been solved, nanofiltration membrane treatment process only separates bivalent and more than bivalent sulfate plasma simultaneously, monovalent sulfate gets into clear liquid side (clear sulphuric acid side) and returns production system after the concentration, be used for titanium white powder production acidolysis process to use. Because of getting rid of divalent ion, the sulphuric acid after receiving the filtration can not appear the problem of structure jam at MVR evaporation concentration in-process, has guaranteed MVR evaporation concentration system's even running, and current nanofiltration membrane system + RO membrane processing system's processing technology is because of receiving the filtration in-process iron ion and is got rid of totally basically, leads to RO membrane processing system equipment under the condition that does not have iron ion protection, and equipment corrodes seriously, unable normal operating, and recovery system in this application has overcome this drawback.
In a preferred embodiment, the inlet of the micro-filtration system is connected with the wastewater tank of the production system through a pipeline, a micro-filtration feeding pump is arranged on the pipeline, and automatic and stable feeding can be realized after the micro-filtration feeding pump is started.
In a preferred embodiment, the outlet of the nanofiltration concentrated water tank is connected to a nanofiltration concentrated water recycling pump through a pipeline, and the nanofiltration concentrated water recycling pump is used for conveying materials and returning the materials to production, so that the cost is saved, and the environment is protected.
In a preferred embodiment, the outlet of the concentrated acid tank is connected to a concentrated acid recycling pump through a pipeline, and the concentrated acid recycling pump is used for conveying materials to an acidolysis system for acidolysis process.
In a preferred embodiment, the outlet of the condensed water tank is connected to a condensed water recycling pump through a pipeline, and the condensed water recycling pump is used for returning water to the titanium dioxide production system for washing.
Compared with the prior art, the utility model discloses following beneficial effect has: the acid wastewater recovery system for the titanium dioxide production process is provided, and adopts a microporous filtration system, a nanofiltration membrane system and an MVR evaporation concentration system to perform sectional treatment, organic combination and integral operation. Titanium dioxide acid waste water passes through the millipore filtration system, the separation of tiny solid particle has been realized, the steady operation of nanofiltration membrane has been guaranteed, the separation of bivalent and above bivalent ion and monovalent ion has been realized to useless waste water after the nanofiltration membrane, ferric separation has been realized, MVR evaporation concentration system is through preheating, the evaporation, concentration makes the sulphuric acid of low concentration return production system from concentration 5~10% concentration to 35~55%, millipore filtration system has realized the recovery of titanium and the purification of waste water, nanofiltration membrane system has realized the separation of iron, the purification of sulphuric acid, MVR evaporation concentration system has realized the improvement of sulphuric acid concentration, the retrieval and utilization of evaporation comdenstion water. The whole wastewater recovery degree is high, and the environment is friendly.
Drawings
FIG. 1 is a schematic diagram of the equipment and piping connections of the acid wastewater recovery system of the present application.
Fig. 2 is a partially enlarged view of the area a in fig. 1.
Fig. 3 is a partially enlarged view of the region B in fig. 1.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The embodiments described below by referring to the drawings are exemplary only for explaining the present invention and are not construed as limiting the present invention, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.
In the description of the present invention, it is to be understood that the term: the center, vertically, transversely, length, width, thickness, upper and lower, preceding, back, left and right, vertical, level, top, end, inside and outside, clockwise, anticlockwise etc. indicate position or positional relationship for based on the position or positional relationship that the drawing shows, just for the convenience of description the utility model discloses and simplified description, consequently can not be understood as the restriction of the utility model. Furthermore, the terms: first, second, etc. 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 shown. In the description of the present invention, unless explicitly stated or limited otherwise, the terms: mounting, connecting, etc. are to be understood broadly and those skilled in the art will understand the specific meaning of the terms in this application as they pertain to the particular situation.
Referring to fig. 1 to 3, the acidic wastewater recovery system for titanium dioxide production process, which is related in the present application, includes a microporous filtration system 2, a clear liquid tank 3, a cartridge filter 5, a nanofiltration membrane system 7, a nanofiltration concentrated water tank 8, a post-nanofiltration sulfuric acid tank 10, an MVR evaporation concentration system 12, a concentrated acid tank 14, and a condensed water tank 16; the inlet of the microporous filtering system 2 is used for receiving wastewater, the liquid outlet of the microporous filtering system 2 is connected to the inlet of the clear liquid tank 3 through a pipeline, and the thick pulp generated by the microporous filtering system 2 returns to the titanium dioxide production system through a pipeline; the outlet of the clear liquid tank 3 is connected to the inlet of a security filter 5 through a pipeline, and an intermediate pump 4 is arranged on the pipeline; the outlet of the security filter 5 is connected to the inlet of a nanofiltration membrane system 7 through a pipeline, and a nanofiltration high-pressure pump 6 is arranged on the pipeline; a concentrated water outlet of the nanofiltration membrane system 7 is connected to an inlet of a nanofiltration concentrated water tank 8 through a pipeline, and a clear liquid outlet of the nanofiltration membrane system 7 is connected to an inlet of a post-nanofiltration sulfuric acid tank 10 through a pipeline; an outlet of the nanofiltration sulfuric acid tank 10 is connected to an inlet of an MVR evaporation concentration system 12 through a pipeline, and an MVR concentration feed pump 11 is arranged on the pipeline; a discharge port of the MVR evaporation concentration system 12 is connected to an inlet of a concentrated acid tank 14 through a pipeline, and an MVR concentration discharge pump 13 is arranged on the pipeline; the condensation water port of the MVR evaporation concentration system 12 is connected to the inlet of the condensation water tank 16 through a pipeline.
In addition, can see from the drawing that in this application, the import of microfiltration system 2 passes through the pipe connection production system wastewater disposal basin, is equipped with micro-filtration charge pump 1 on this pipeline, can realize automatic stable feed after micro-filtration charge pump 1 opens. The outlet of the nanofiltration concentrated water tank 8 is connected to a nanofiltration concentrated water recycling pump 9 through a pipeline, and the nanofiltration concentrated water recycling pump 9 is used for conveying materials and returning the materials to production, so that the cost is saved, and the environment is protected. The outlet of the concentrated acid tank 14 is connected to a concentrated acid recycling pump 15 through a pipeline, and the concentrated acid recycling pump 15 is used for conveying materials to an acidolysis system for acidolysis. The outlet of the condensed water tank 16 is connected to a condensed water recycling pump 17 through a pipeline, and the condensed water recycling pump 17 is used for returning water to the titanium dioxide production system for washing.
In the acid waste water recovery system in this application, the combined technology of the concentrated waste water recovery processing of system + nanofiltration membrane system + MVR evaporation is crossed to the micropore, the drawback of the unable steady operation of conventional milipore filter easy jam has not only been solved, nanofiltration membrane treatment process only separates bivalent and more than bivalent sulfate plasma simultaneously, monovalent sulfate gets into clear solution side (clear sulphuric acid side) and returns production system after the concentration, is used for titanium white powder production acidolysis process to use. Due to the removal of divalent ions, the problem of structural blockage of the nanofiltration sulfuric acid in the MVR evaporation concentration process can be avoided, and the stable operation of the MVR evaporation concentration system is ensured.
The operation principle of each component of the acid wastewater recovery system in the application is as follows.
Microporous filtration system 2: titanium white waste water (washing waste water) is through micropore charge-in pump 1, micropore charge-in pump 1 export links to each other with 2 imports of micropore filtration system, micropore filtration system 2 includes the millipore filter, the blowback pressure empty can, the regeneration tank, the feed control valve, discharge control valve, dense thick liquid discharge valve etc, the inside many polymer filter cores that are provided with of millipore filter, waste water is discharged through filter upper portion liquid outlet behind the filter core, the millipore filtration system adopts DCS control, have automatic filtration, wash, the washing function, can realize filtering capability automatically, get rid of the separation through the solid particle in the millipore filtration system 2 with titanium white acid waste water, acid waste water passes through millipore filtration system 2, dirty stifled index SDI reduces to less than or equal to below 4ppm, the index requirement of receiving the filter membrane feeding has been reached, avoid causing the jam of receiving the filter membrane.
And a nanofiltration membrane system 7: the nanofiltration membrane system comprises a nanofiltration high-pressure pump 6, a security filter 5 and an automatic DCS (distributed control System) control system, a pressure transmitter is arranged at the outlet of the nanofiltration high-pressure pump, a pressure transmitter is arranged at the outlet of a nanofiltration membrane system 7, the DCS automatically operates according to the pressure of a membrane group, flowmeters are respectively arranged at the water inlet, the thick water inlet and the clear liquid outlet of the nanofiltration membrane system, the change of the system flow can reflect the operation condition of the system in real time, the flow of the thick water outlet is 10% of the liquid inlet flow, and the flow of.
MVR evaporative concentration system 12: the MVR evaporation concentration system comprises an MVR concentration feeding pump 10, a condensed water heat exchanger, a heater and a separation tank, the system comprises a compressor, a washing tower, a vacuum pump and other parts, sulfuric acid after nanofiltration enters an MVR concentration system through an MVR concentration feed pump 10, the MVR concentration system automatically operates, the sulfuric acid after nanofiltration is preheated to 90 ℃ through a condensed water heat exchanger according to set parameters, the preheated sulfuric acid enters a steam preheater, the sulfuric acid is preheated to 120 ℃ through the steam preheater and then enters an evaporator falling film circulation, the system is concentrated in a three-stage circulation mode, the sulfuric acid after the nanofiltration of the feed is concentrated to 35-50% from 5-10% through an MVR discharge pump 13 and then enters a concentrated acid tank 14, materials in the concentrated acid tank 14 return to a production system through a concentrated acid recycling pump 15, condensed water of the MVR evaporation concentration system is preheated through the condensed water to preheat the sulfuric acid, then enters a condensed water tank 16, and returns to a titanium white production system through a condensed water recycling pump.
More than, the utility model provides an acid waste water recovery system for titanium white powder production process through adopting microporous filtration system, receiving and filtering membrane system, MVR evaporative concentration system, and the segmentation is handled, organic combination, whole operation. Titanium dioxide acid waste water passes through the millipore filtration system, the separation of tiny solid particle has been realized, the steady operation of nanofiltration membrane has been guaranteed, the separation of bivalent and above bivalent ion and monovalent ion has been realized to useless waste water after the nanofiltration membrane, ferric separation has been realized, MVR evaporation concentration system is through preheating, the evaporation, concentration makes the sulphuric acid of low concentration return production system from concentration 5~10% concentration to 35~55%, millipore filtration system has realized the recovery of titanium and the purification of waste water, nanofiltration membrane system has realized the separation of iron, the purification of sulphuric acid, MVR evaporation concentration system has realized the improvement of sulphuric acid concentration, the retrieval and utilization of evaporation comdenstion water. The whole wastewater recovery degree is high, and the environment is friendly.
The protection scope of the present invention includes but is not limited to the above embodiments, the protection scope of the present invention is subject to the claims, and any replacement, deformation, and improvement that can be easily conceived by those skilled in the art made by the present technology all fall into the protection scope of the present invention.
Claims (5)
1. An acid wastewater recovery system for a titanium dioxide production process is characterized by comprising a microporous filtration system (2), a clear liquid tank (3), a security filter (5), a nanofiltration membrane system (7), a nanofiltration concentrated water tank (8), a post-nanofiltration sulfuric acid tank (10), an MVR evaporation concentration system (12), a concentrated acid tank (14) and a condensed water tank (16);
an inlet of the microporous filtering system (2) is used for receiving wastewater, a liquid outlet of the microporous filtering system (2) is connected to an inlet of the clear liquid tank (3) through a pipeline, and thick pulp generated by the microporous filtering system (2) returns to the titanium dioxide production system through a pipeline;
the outlet of the clear liquid tank (3) is connected to the inlet of the security filter (5) through a pipeline, and an intermediate pump (4) is arranged on the pipeline;
the outlet of the security filter (5) is connected to the inlet of a nanofiltration membrane system (7) through a pipeline, and a nanofiltration high-pressure pump (6) is arranged on the pipeline;
a concentrated water outlet of the nanofiltration membrane system (7) is connected to an inlet of a nanofiltration concentrated water tank (8) through a pipeline, and a clear liquid outlet of the nanofiltration membrane system (7) is connected to an inlet of a post-nanofiltration sulfuric acid tank (10) through a pipeline;
an outlet of the nanofiltration sulfuric acid tank (10) is connected to an inlet of an MVR evaporation concentration system (12) through a pipeline, and an MVR concentration feed pump (11) is arranged on the pipeline;
a discharge hole of the MVR evaporation concentration system (12) is connected to an inlet of a concentrated acid tank (14) through a pipeline, and an MVR concentration discharge pump (13) is arranged on the pipeline; the condensation water port of the MVR evaporation concentration system (12) is connected to the inlet of a condensation water tank (16) through a pipeline.
2. The acid wastewater recovery system for the titanium dioxide production process according to claim 1, wherein the inlet of the microporous filtration system (2) is connected with a production system wastewater pool through a pipeline, and a microfiltration feed pump (1) is arranged on the pipeline.
3. The acid wastewater recovery system for the titanium dioxide production process according to claim 1, wherein the outlet of the nanofiltration concentrated water tank (8) is connected to a nanofiltration concentrated water recycling pump (9) through a pipeline, and the nanofiltration concentrated water recycling pump (9) is used for conveying materials and returning the materials to production.
4. The acid wastewater recovery system for the titanium dioxide production process as recited in claim 1, wherein the outlet of the concentrated acid tank (14) is connected to a concentrated acid recycling pump (15) through a pipeline, and the concentrated acid recycling pump (15) is used for conveying materials to the acidolysis system.
5. The acid wastewater recovery system for the titanium dioxide production process according to claim 1, wherein the outlet of the condensed water tank (16) is connected to a condensed water recycling pump (17) through a pipeline, and the condensed water recycling pump (17) is used for returning water to the titanium dioxide production system for washing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921868419.3U CN210945205U (en) | 2019-11-01 | 2019-11-01 | A acid waste water recovery system for titanium white powder production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921868419.3U CN210945205U (en) | 2019-11-01 | 2019-11-01 | A acid waste water recovery system for titanium white powder production process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210945205U true CN210945205U (en) | 2020-07-07 |
Family
ID=71395607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921868419.3U Active CN210945205U (en) | 2019-11-01 | 2019-11-01 | A acid waste water recovery system for titanium white powder production process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210945205U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112624267A (en) * | 2020-12-17 | 2021-04-09 | 襄阳龙蟒钛业有限公司 | Titanium dioxide production reclaimed water recycling treatment method and treatment system thereof |
| CN114249479A (en) * | 2021-12-23 | 2022-03-29 | 宁波新福钛白粉有限公司 | Dilute alkali liquor recovery system and method in sulfuric acid method titanium dioxide production process |
-
2019
- 2019-11-01 CN CN201921868419.3U patent/CN210945205U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112624267A (en) * | 2020-12-17 | 2021-04-09 | 襄阳龙蟒钛业有限公司 | Titanium dioxide production reclaimed water recycling treatment method and treatment system thereof |
| CN114249479A (en) * | 2021-12-23 | 2022-03-29 | 宁波新福钛白粉有限公司 | Dilute alkali liquor recovery system and method in sulfuric acid method titanium dioxide production process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105254106A (en) | High-salt waste water zero emission and salt separation processing method and device | |
| CN105540960B (en) | The processing method and system of limestone/lime-gypsum method flue gas desulfurization waste-water | |
| CN100450592C (en) | Metal smelting factory sewage reclaiming method based on membrane filtering technique | |
| CN105565573A (en) | Device and method for desulfurization waste water zero discharge treatment | |
| CN104176857B (en) | The treatment process of Mn-bearing waste water in wet method electrolysis manganese production process | |
| CN102807296A (en) | Process for deeply treating and recycling high-salinity industrial waste water | |
| CN205088051U (en) | Processing apparatus of zero release of high salt waste water and salt separation | |
| CN210945205U (en) | A acid waste water recovery system for titanium white powder production process | |
| CN103482809A (en) | Technology for realizing zero discharge of waste water caused by white carbon black production | |
| CN101172724A (en) | Method for processing sewage from industrial cycle water | |
| CN210117307U (en) | Waste incineration fly ash washing water resource treatment system | |
| CN201746400U (en) | Depth treatment system for reclaimed water recycling | |
| CN205653287U (en) | Device that zero release of desulfurization waste water was handled | |
| CN212025040U (en) | Electrodialysis desalination treatment system for circulating water and sewage of thermal power plant | |
| CN105347592A (en) | Recycling zero-emission treatment process for desulfurization wastewater | |
| CN204569574U (en) | The treatment system of Titanium White Production By Sulfuric Acid Process discharge acid waste water | |
| CN102153218A (en) | Device and process for treating chromate waste water | |
| CN212198888U (en) | Desulfurization waste water concentration decrement device based on film evaporation technique | |
| CN211688666U (en) | Phosphorite wastewater recycling system based on chemical precipitation method and membrane distillation | |
| CN112679025A (en) | Treatment system and method for recycling reduction solidification resources of electrolytic aluminum slag leachate | |
| CN104086011A (en) | Zero discharge process suitable for waste water of viscose fiber industrial acid station | |
| CN108409050B (en) | Zero-emission treatment process for high-salinity wastewater | |
| CN110171893A (en) | A kind of full factory waste water zero discharge system and method for water resource of reclaimed water plant gas | |
| CN103073143B (en) | Strong brine zero emission treatment process for iron and steel plant | |
| CN215102628U (en) | Processing system of concentrated water resourceization of high salt |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |