CN105833580A - Box type filter press filtering process of sodium sulfate - Google Patents
Box type filter press filtering process of sodium sulfate Download PDFInfo
- Publication number
- CN105833580A CN105833580A CN201610266279.7A CN201610266279A CN105833580A CN 105833580 A CN105833580 A CN 105833580A CN 201610266279 A CN201610266279 A CN 201610266279A CN 105833580 A CN105833580 A CN 105833580A
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- CN
- China
- Prior art keywords
- chamber
- type press
- filter press
- filter
- press filter
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
- B01D25/12—Filter presses, i.e. of the plate or plate and frame type
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
- C01D5/16—Purification
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention relates to a box type filter press filtering process of sodium sulfate, which can be adaptive to a strong corrosion solution and can also prevent large-area salt from hardening. The box type filter press filtering process comprises the following steps: (1) blending a salt-water mixture to be treated in a material tank; (2) pumping the salt-water mixture to be treated into a box type filter press through a material pump, and filtering and separating impurity components in the salt-water mixture and a sodium sulfate solution by adopting an intercepting effect of filter cloth in the box type filter press; (3) after filtering the salt-water mixture, blowing compressed air into the box type filter press through a back-blowing hole of the box type filter press, and blowing the residual salt-water mixture in a feeding main pipeline of the filter press back into the material tank through the compressed air; and (4) after back-flowing, performing decompressing and returning of the box type filter press, and automatically pulling a membrane plate by a pull plate mechanism of the box type filter press to unload a filter cake. When the salt-water mixture is filtered and separated through the box type filter press, hot water is introduced into the box type filter press so that the water temperature in the membrane plate in the box type filter press is kept to be 50 DEG C and above.
Description
Technical field
The present invention relates to a kind of sodium sulfate chamber-type press filter filtering technique not only having adapted to deep-etching solution but also having prevented large area salinity from hardening, belong to sodium sulfate industrial producing field.
Background technology
Natrii Sulfas coal reduction method production technology more ripe in existing sodium sulfate industrial producing method, use flow process: converter is burnt, full-boiled process leaches, chamber-type press filter filters, waste heat boiler reclaims flue residue heat, and H2S absorption tower absorbs material waste gas, two sections of external-heating forced circulations of single-action, vacuum evaporation alkali liquor, finished product pelletize.In chamber-type press filter filtering technique, there is salt in pending saline mixture be divided into brine sludge (Na2 SO4 and NaCl etc.), there is crystallization and harden tendency, the complex working conditions such as chlorine ion concentration is high, have a strong impact on the filter effect of chamber-type press filter.
Summary of the invention
Purpose of design: for avoiding the deficiency in background technology, designs a kind of sodium sulfate chamber-type press filter filtering technique not only having adapted to deep-etching solution but also having prevented large area salinity from hardening.
Design: for realizing above-mentioned purpose of design.1, the water temperature in diaphragm plate is maintained at 50 DEG C and above design, is one of the technical characteristic of the present invention.So purpose of design is: be about 42-45g/100ml owing to sodium sulfate dissolubility is relatively stable between the water temperature of 50 DEG C-100 DEG C, when water temperature is less than 50 DEG C, metabisulfite solution easily separates out sodium sulfate crystal, and separate out sodium sulfate crystal can harden cause at diaphragm plate edge diaphragm plate filter time occur that Seepage makes partial impurities be mixed in metabisulfite solution, have a strong impact on the chamber-type press filter filter effect to sodium sulfate, it is incubated (water temperature is maintained at more than 50 DEG C) with hot water heating in diaphragm plate, saline mixture can be effectively stoped to separate out sodium sulfate crystal in filter process and occur that salinity hardens phenomenon.2, compressed-air actuated temperature is more than or equal to the design of 50 DEG C, be the present invention technical characteristic two.So purpose of design is: one is that in chamber-type press filter can be fed main pipeline by the compressed air during blowback, salt residue aqueous mixtures blows back to batch can, it is ensured that the cleanliness factor of filter cake so that filter cloth and diaphragm plate are more easy to cleaned；Two is that compressed air is the hot blast that temperature is not less than 50 DEG C during blowback, hot blast can purge the liquid of filter cake remained on surface, to reduce filter cake surface moisture content, thus reduce the incidence rate of crystalline polamer, thus reduce further filter cloth and the possibility that salinity hardens occurs in diaphragm plate.3, the sealing ring of described filter cloth carries out the design that gluing process and filter cloth use rectangle filter cloth chip architecture to straddle on diaphragm plate, be the present invention technical characteristic three.So purpose of design is: filter cloth mounting structure is readily accessible, and beneficially filter effect cleans filter cloth after declining in time.
Technical scheme: a kind of sodium sulfate chamber-type press filter filtering technique, comprises the following steps: (1) is conditioned pending saline mixture in batch can；(2) pending saline mixture materials pump is squeezed into chamber-type press filter, separate relying on the crown_interception of filter cloth in chamber-type press filter that with metabisulfite solution, the impurity composition in saline mixture is carried out filtration；(3) after saline mixture has filtered, compressed air being blown in chamber-type press filter by the back blow port of chamber-type press filter, in pressure filter is fed main pipeline by compressed air, salt residue aqueous mixtures blows back to batch can；(4), after blowback terminates, chamber-type press filter pressure release backhaul, chamber-type press filter drawing-plate mechanism automatically pulls open diaphragm plate and draws off filter cake.When saline mixture is carried out filtering and separates by chamber-type press filter, be passed through in chamber-type press filter hot water make the water temperature in chamber-type press filter septation plate be maintained at 50 DEG C and more than.
The present invention is compared with background technology, and sodium sulfate chamber-type press filter filtering technique is prevented from chamber-type press filter occurring that large-area salinity hardens phenomenon, thus improves filter efficiency and the effect of chamber-type press filter.
Accompanying drawing explanation
Fig. 1 is sodium sulfate chamber-type press filter filtering technique figure.
Fig. 2 is sodium sulfate chamber-type press filter filtering technique flow chart.
Fig. 3 is the structural representation that filter cloth horseback riding type is arranged on filter plate.
Detailed description of the invention
Embodiment 1: 1 to Fig. 3 referring to the drawings.A kind of sodium sulfate chamber-type press filter filtering technique, comprises the following steps: (1) is conditioned pending saline mixture in batch can 1；(2) pending saline mixture materials pump 2 is squeezed into chamber-type press filter 3, separate relying on the crown_interception of filter cloth 6 in chamber-type press filter 3 that with metabisulfite solution, the impurity composition in saline mixture is carried out filtration；(3) after saline mixture has filtered, by the back blow port of chamber-type press filter 3, compressed air is blown in chamber-type press filter 3, described blast heater blowout 4, in pressure filter is fed main pipeline by compressed air, salt residue aqueous mixtures blows back to batch can, i.e. the saline mixture of residual in charging main pipeline is carried out blowback backflow；(4), after blowback terminates, chamber-type press filter 3 pressure release backhaul, chamber-type press filter 3 drawing-plate mechanism automatically pulls open diaphragm plate 7 and draws off filter cake.When saline mixture is carried out filtering and separates by chamber-type press filter 3, hot-water heating system 5 be passed through in chamber-type press filter hot water make the water temperature in chamber-type press filter septation plate 7 be maintained at 50 DEG C and more than.Described carry out the compressed-air actuated temperature of blowback more than or equal to 50 DEG C to chamber-type press filter.The sealing ring of described filter cloth 6 carries out gluing process and filter cloth 6 uses rectangle filter cloth chip architecture to straddle on diaphragm plate 7.Described pending saline mixture is the brine sludge mixed liquor containing Na2 SO4 and NaCl.Increasing the flow passage aperture of diaphragm plate 7, prevent from as far as possible avoiding runner blocking occur, the liquid outlet of diaphragm plate 7 is arranged to inclined hole, and such diaphragm plate 7 runner is beneficial to filtrate and carries tiny salt crystalline substance to discharge, thus enhances filter efficiency.Filter cake after filtration uses belt conveyor conveying, and belt surface is smooth and is made up of PVC material, is provided with salt material scraper in belt conveyor, and such conveying mechanism is prevented from the accumulation of salt grain and hardens, thus improves transfer efficiency and mud extraction rate.
It is to be understood that: although the word that the mentality of designing of the present invention is contrasted detailed by above-described embodiment describes; but these words describe; simply the simple text of mentality of designing of the present invention is described; rather than the restriction to mentality of designing of the present invention; any combination without departing from mentality of designing of the present invention, increase or revise, each falling within protection scope of the present invention.
Claims (4)
1. a sodium sulfate chamber-type press filter filtering technique, comprises the following steps:
(1) conditioned pending saline mixture in batch can；
(2) pending saline mixture materials pump is squeezed into chamber-type press filter, separate relying on the crown_interception of filter cloth in chamber-type press filter that with metabisulfite solution, the impurity composition in saline mixture is carried out filtration；
(3) after saline mixture has filtered, compressed air being blown in chamber-type press filter by the back blow port of chamber-type press filter, in pressure filter is fed main pipeline by compressed air, salt residue aqueous mixtures blows back to batch can；
(4), after blowback terminates, chamber-type press filter pressure release backhaul, chamber-type press filter drawing-plate mechanism automatically pulls open diaphragm plate and draws off filter cake；
It is characterized in that: when saline mixture is carried out filtering and separates by chamber-type press filter, be passed through in chamber-type press filter hot water make the water temperature in chamber-type press filter septation plate be maintained at 50 DEG C and more than.
Sodium sulfate chamber-type press filter filtering technique the most according to claim 1, is characterized in that: described carry out the compressed-air actuated temperature of blowback more than or equal to 50 DEG C to chamber-type press filter.
Sodium sulfate chamber-type press filter filtering technique the most according to claim 1, is characterized in that: the sealing ring of described filter cloth carries out gluing process and filter cloth uses rectangle filter cloth chip architecture to straddle on diaphragm plate.
Sodium sulfate chamber-type press filter filtering technique the most according to claim 1, is characterized in that: described pending saline mixture is for containing Na2
The brine sludge mixed liquor of SO4 and NaCl.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610266279.7A CN105833580A (en) | 2016-04-27 | 2016-04-27 | Box type filter press filtering process of sodium sulfate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610266279.7A CN105833580A (en) | 2016-04-27 | 2016-04-27 | Box type filter press filtering process of sodium sulfate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105833580A true CN105833580A (en) | 2016-08-10 |
Family
ID=56589184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610266279.7A Pending CN105833580A (en) | 2016-04-27 | 2016-04-27 | Box type filter press filtering process of sodium sulfate |
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| Country | Link |
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| CN (1) | CN105833580A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107126736A (en) * | 2017-07-05 | 2017-09-05 | 陕西省石油化工研究设计院 | Crystal salt equipment for separating liquid from solid and its method are hydrated in a kind of coal chemical industrial waste water |
| CN109331521A (en) * | 2018-12-06 | 2019-02-15 | 河钢股份有限公司承德分公司 | A kind of device and method of Full-automatic filter vanadic acid sodium crystal |
Citations (5)
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| CN102091453A (en) * | 2010-12-29 | 2011-06-15 | 日照金禾博源生化有限公司 | Plate-and-frame filter press used in citric acid production process and solid-liquid separating method thereof |
| JP2014094319A (en) * | 2012-11-07 | 2014-05-22 | Ito seisakusho co ltd | Filter cloth washing device for filter press |
| CN203648165U (en) * | 2013-12-16 | 2014-06-18 | 中节能六合天融环保科技有限公司 | Plate-and-frame filter press for filtering magnesium sulphate saturated solution at high temperature |
| CN204246923U (en) * | 2014-11-27 | 2015-04-08 | 中国铝业股份有限公司 | A kind of horizontal vacuum belt filter with filter plate dredger |
| CN104784994A (en) * | 2015-04-16 | 2015-07-22 | 佛山市金凯地过滤设备有限公司 | Pneumatic water filtering-type press filter with backblowing air drying structure |
-
2016
- 2016-04-27 CN CN201610266279.7A patent/CN105833580A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102091453A (en) * | 2010-12-29 | 2011-06-15 | 日照金禾博源生化有限公司 | Plate-and-frame filter press used in citric acid production process and solid-liquid separating method thereof |
| JP2014094319A (en) * | 2012-11-07 | 2014-05-22 | Ito seisakusho co ltd | Filter cloth washing device for filter press |
| CN203648165U (en) * | 2013-12-16 | 2014-06-18 | 中节能六合天融环保科技有限公司 | Plate-and-frame filter press for filtering magnesium sulphate saturated solution at high temperature |
| CN204246923U (en) * | 2014-11-27 | 2015-04-08 | 中国铝业股份有限公司 | A kind of horizontal vacuum belt filter with filter plate dredger |
| CN104784994A (en) * | 2015-04-16 | 2015-07-22 | 佛山市金凯地过滤设备有限公司 | Pneumatic water filtering-type press filter with backblowing air drying structure |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107126736A (en) * | 2017-07-05 | 2017-09-05 | 陕西省石油化工研究设计院 | Crystal salt equipment for separating liquid from solid and its method are hydrated in a kind of coal chemical industrial waste water |
| CN109331521A (en) * | 2018-12-06 | 2019-02-15 | 河钢股份有限公司承德分公司 | A kind of device and method of Full-automatic filter vanadic acid sodium crystal |
| CN109331521B (en) * | 2018-12-06 | 2024-05-14 | 河钢股份有限公司承德分公司 | Device and method for fully automatically filtering sodium vanadate crystals |
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Application publication date: 20160810 |
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