CN202193629U - Filter device for brine denitration and purification - Google Patents
Filter device for brine denitration and purification Download PDFInfo
- Publication number
- CN202193629U CN202193629U CN2011204012029U CN201120401202U CN202193629U CN 202193629 U CN202193629 U CN 202193629U CN 2011204012029 U CN2011204012029 U CN 2011204012029U CN 201120401202 U CN201120401202 U CN 201120401202U CN 202193629 U CN202193629 U CN 202193629U
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- CN
- China
- Prior art keywords
- filter device
- ceramic membrane
- brine
- denitration
- membrane filter
- Prior art date
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Abstract
The utility model relates to the technical field of salt manufacturing, in particular to a filter device for brine denitration and purification, which comprises pipelines, an original brine bank, a baffling groove, a retort, a ceramic membrane filter, a salt pond and a refined brine bank. The original brine bank, the baffling groove, the retort, the ceramic membrane filter, the salt pond and the refined brine tank are connected sequentially through the pipelines, a nanofiltration membrane denitration device is further arranged on a liquid outlet of the ceramic membrane filter, a light salt brine tank is communicated with a liquid inlet of the nanofiltration membrane denitration device, and the liquid outlet of the nanofiltration membrane denitration device is communicated with the salt pond. The ceramic membrane filter and the nanofiltration membrane denitration device are matched to be used, and a physical method is utilized to filter. Compared with the traditional chemical method, the filter device effectively saves cost, is good in economy efficiency, and does not cause pollution to environment.
Description
Technical field
The utility model relates to the salt making technology field, particularly a kind of filtration unit that is used for bittern denitration purification.
Background technology
Along with the continual renovation of two alkali production technique upgrading, its requirement to liquid salt is also increasingly high, and influencing bigger is Ca
2+, Mg
2+And SO
4 2-SO
4 2-If most critical is SO
4 2-Content is high, can make electrolytic decrease in efficiency, increases voltage, even influences the life-span of ionic membrane, secondly is Ca
2+, influence life-span of ionic membrane equally.Soda ash requires lower to salt matter, but the expense of processing impurity also is higher.Brine quality is the key that guarantees that electric groove moves and prolong membrane life under high current efficiency and low voltage.As adopt advanced metal trough, and to brine quality higher requirement will be arranged, simple mining brine can not adapt to the demand in two alkali markets.This just needs to be refined into refining halogen through purifying treatment by former halogen, supplies two alkali to use.According to the difference of each former halogen composition, can take corresponding purification process: as only containing in the former halogen: Ca
2+, Mg
2+, only need just can remove, if contain SO simultaneously through two alkaline process
4 2-Content is higher, can be through adding BaCl
2To remove.
Traditional denitration technology is the method that adopts chemical reagent, like BaCl
2Method, CaCl
2Method and BaCO
3Method, the sulfate radical that the method for employing chemical reagent removes in the bittern has following characteristics: 1) the chemical reagent expense is high, uses can produce a large amount of waste residues later; 2) BaCl
2And BaCO
3All belong to highly toxic substance, big for environment pollution; 3) working cost is high, and every cubic metre of bittern purifying expense is embrane method and resin filter three times.In denitration technology; It is the cold method denitration that the method for employing physics is also arranged, different according to the saturation ratio of sodium sulfate under differing temps, with extremely subzero 5 to 7 ℃ of brine freezings; Separate out sulfate radical contained in the salt solution is freezing; This method energy consumption is higher, and investment cost and running cost are all higher, SO in the salt solution
4 2-Content then has no advantage and can say if is lower than 10g/l, and is all high than the chemical process expense.
For the Ca in the bittern
2+, Mg
2+Treatment process, usually in the baffling groove with 30% caustic soda (NaOH) and 98% soda ash (Na
2CO
3) reaction, to remove the Ca in the former halogen
2+And Mg
2+, will react back bittern then, add ZX-I (or SEPIGEL 305) flocculation agent, after the CN strainer filters; Bucket got into smart halogen bucket, the method for this employing CN strainer again in the middle of clear liquor pumped into; The requirement that its filtering accuracy SS turbidity does not reach the chlor-alkali industry primary brine, the SS index is about 5mg/l, simultaneously; The CN strainer, filtering the main body jar all is open type, environment has certain influence to brine quality.
The utility model content
The technical problem that the utility model will solve is: a kind of filtration unit that the bittern denitration is purified that is used for is provided, and it is simple and economical inadequately to solve existing denitrification apparatus, the technical problem of poor filtration effect.
The utility model solves the technical scheme that its technical problem adopted: a kind of filtration unit that is used for bittern denitration purification; Comprise pipeline, former halogen bucket, baffling groove, retort, ceramic membrane filter device, change salt pond and smart halogen bucket; Former halogen bucket, baffling groove, retort, ceramic membrane filter device, change salt pond link to each other through pipeline with smart halogen bucket successively; Said ceramic membrane filter device liquid outlet also is provided with the nf membrane denitrification apparatus; The fluid inlet of said nf membrane denitrification apparatus is communicated with the light salt brine jar, and the liquid outlet of nf membrane denitrification apparatus is communicated with the change salt pond.
For filter effect is strengthened; Said ceramic membrane filter device comprises first step assembly, second stage assembly and third stage assembly; Said first step assembly, second stage assembly and third stage assembly pass through pipeline connection successively; First step assembly links to each other with retort, and third stage assembly is communicated with change salt pond and nf membrane denitrification apparatus respectively.
In order to guarantee that crude brine has essentially identical flow velocity at ceramic membrane surface, the membrane area of the first step assembly of said ceramic membrane filter device, second stage assembly and third stage assembly reduces successively.
The beneficial effect of the utility model is; The filtration unit that is used for bittern denitration purification of the utility model through ceramic membrane filter device and nf membrane denitrification apparatus are used, adopts the method for physics to filter; Compare traditional chemical process; Effectively provide cost savings good economy performance, and environmentally safe.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Fig. 1 is the schema of the filtration unit that is used for bittern denitration purification of the utility model;
Fig. 2 is the structural representation of the ceramic membrane filter device that is used for the filtration unit that the bittern denitration purifies of the utility model.
Among the figure: 1. first step assembly, 2. second stage assembly, 3. third stage assembly, 4. pipeline, solid arrow is represented bittern.
Embodiment
Combine accompanying drawing that the utility model is done further detailed explanation now.These accompanying drawings are the synoptic diagram of simplification, the substruction of the utility model only is described in a schematic way, so it only show the formation relevant with the utility model.
The specific embodiment that is used for the filtration unit that the bittern denitration purifies like Fig. 1 the utility model shown in Figure 2; Comprise pipeline 4, former halogen bucket, baffling groove, retort, ceramic membrane filter device, change salt pond and smart halogen bucket; Former halogen bucket, baffling groove, retort, ceramic membrane filter device, change salt pond link to each other through pipeline 4 with smart halogen bucket successively; Ceramic membrane filter device liquid outlet also is provided with the nf membrane denitrification apparatus; The fluid inlet of nf membrane denitrification apparatus is communicated with the light salt brine jar, and the liquid outlet of nf membrane denitrification apparatus is communicated with the change salt pond.For effective impurity screening; The ceramic membrane filter device comprises first step assembly 1, second stage assembly 2 and third stage assembly 3; First step assembly 1, second stage assembly 2 and third stage assembly 3 are communicated with through pipeline 4 successively; First step assembly 1 links to each other with retort, and third stage assembly 3 is communicated with change salt pond and nf membrane denitrification apparatus respectively.The membrane area of the first step assembly 1 of ceramic membrane filter device, second stage assembly 2 and third stage assembly 3 reduces successively, and such design can guarantee that crude brine has essentially identical flow velocity at ceramic membrane surface.
Raw brine in the former halogen bucket through the baffling groove with get into the retort reaction after caustic soda and soda ash mix, then filter out CaCO through the ceramic membrane filter device
3And Mg (OH)
2Deng solid; A part of bittern entering nf membrane denitrification apparatus is handled with the light salt brine mixing denitration in the light salt brine jar in the bittern after the filtration; Another part bittern with the bittern entering salt pond after the nf membrane denitrification apparatus is handled and with the saturated processing of diffusing wet salt, and then in smart halogen bucket, can obtain purified bittern.
It is as shown in the table that refining bittern filters contrast:
| Project | The CN strainer | The ceramic membrane filter device |
| Ca 2++Mg 2+(mg/L) | ≤10 | ≤5 |
| SS(mg/L) | ≤5 | ≤1 |
The filtration unit that is used for bittern denitration purification of the utility model is introduced the supporting use of ceramic membrane filter device, and filtering accuracy is higher, and brine quality improves greatly.
With above-mentioned desirable embodiment according to the utility model is enlightenment, and through above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this utility model technological thought.The technical scope of this utility model is not limited to the content on the specification sheets, must confirm its technical scope according to the claim scope.
Claims (3)
1. one kind is used for the filtration unit that the bittern denitration is purified; It is characterized in that: comprise pipeline (4), former halogen bucket, baffling groove, retort, ceramic membrane filter device, change salt pond and smart halogen bucket; Former halogen bucket, baffling groove, retort, ceramic membrane filter device, change salt pond link to each other through pipeline with smart halogen bucket successively; Said ceramic membrane filter device liquid outlet also is provided with the nf membrane denitrification apparatus; The fluid inlet of said nf membrane denitrification apparatus is communicated with the light salt brine jar, and the liquid outlet of nf membrane denitrification apparatus is communicated with the change salt pond.
2. the filtration unit that is used for bittern denitration purification as claimed in claim 1; It is characterized in that: said ceramic membrane filter device comprises first step assembly (1), second stage assembly (2) and third stage assembly (3); Said first step assembly (1), second stage assembly (2) and third stage assembly (3) are communicated with through pipeline (4) successively; First step assembly (1) links to each other with retort, and third stage assembly (3) is communicated with change salt pond and nf membrane denitrification apparatus respectively.
According to claim 1 or claim 2 be used for the filtration unit that the bittern denitration is purified, it is characterized in that: the membrane area of the first step assembly (1) of said ceramic membrane filter device, second stage assembly (2) and third stage assembly (3) reduces successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204012029U CN202193629U (en) | 2011-10-20 | 2011-10-20 | Filter device for brine denitration and purification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204012029U CN202193629U (en) | 2011-10-20 | 2011-10-20 | Filter device for brine denitration and purification |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202193629U true CN202193629U (en) | 2012-04-18 |
Family
ID=45948550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204012029U Expired - Lifetime CN202193629U (en) | 2011-10-20 | 2011-10-20 | Filter device for brine denitration and purification |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202193629U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103738980A (en) * | 2013-12-11 | 2014-04-23 | 张水明 | Method for preparing high-purity water salt and serial products by using well and rock salt raw material brine |
| CN105905927A (en) * | 2016-06-20 | 2016-08-31 | 中盐金坛盐化有限责任公司 | Brine purification device and method for removing strontium element from sodium sulfate type brine |
| CN107572554A (en) * | 2017-09-26 | 2018-01-12 | 中盐金坛盐化有限责任公司 | A kind of clean energy-saving type produces salt producing craft |
-
2011
- 2011-10-20 CN CN2011204012029U patent/CN202193629U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103738980A (en) * | 2013-12-11 | 2014-04-23 | 张水明 | Method for preparing high-purity water salt and serial products by using well and rock salt raw material brine |
| CN105905927A (en) * | 2016-06-20 | 2016-08-31 | 中盐金坛盐化有限责任公司 | Brine purification device and method for removing strontium element from sodium sulfate type brine |
| CN107572554A (en) * | 2017-09-26 | 2018-01-12 | 中盐金坛盐化有限责任公司 | A kind of clean energy-saving type produces salt producing craft |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120418 |