CN106044822A - Device and production method for producing light calcium carbonate by using secondary salt slurry - Google Patents
Device and production method for producing light calcium carbonate by using secondary salt slurry Download PDFInfo
- Publication number
- CN106044822A CN106044822A CN201610610455.4A CN201610610455A CN106044822A CN 106044822 A CN106044822 A CN 106044822A CN 201610610455 A CN201610610455 A CN 201610610455A CN 106044822 A CN106044822 A CN 106044822A
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- China
- Prior art keywords
- calcium carbonate
- brine sludge
- outlet
- thickener
- centrifuge
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/18—Carbonates
- C01F11/185—After-treatment, e.g. grinding, purification, conversion of crystal morphology
Abstract
The invention relates to production device and production method for calcium carbonate and particularly relates to a device and production method for producing light calcium carbonate by using secondary salt slurry. The device comprises a dechlorinating barrel, a thickener, a winnower and a sedimentation tank, wherein a secondary salt slurry outlet of the dechlorinating barrel is connected with a secondary salt slurry liquid inlet of the thickener, a secondary salt slurry thickened slurry outlet of the thickener is connected with a liquid inlet of a centrifuge, a light calcium carbonate wet stock discharge opening of the centrifuge is connected with a charging opening of a dryer, and a dry powder outlet of the dryer is connected with a material inlet of a grinding machine and/or the winnower. The device has the following advantages that the dechlorination of the secondary salt slurry is achieved by adopting the dechlorinating barrel and the thickener, so that the employing of high-energy-consumption centrifugal dechlorinating equipment is avoided; the secondary salt slurry is subjected to thickening treatment firstly by adopting the dechlorinating barrel and the thickener, so that the treating capacity of secondary salt slurry dehydration equipment is increased; by replacing a press filter with the centrifuge, the phenomenon of agglomerating of wet stock is lowered, and the dispersity of the wet stock can be improved.
Description
Technical field
The present invention relates to process units and the production method of a kind of calcium carbonate, particularly one utilizes secondary brine sludge to produce gently
The device of matter calcium carbonate and production method.
Background technology
A large amount of brine sludge is produced during ammonia-soda process soda manufacture.Brine sludge is directly drained as solid waste, on the one hand causes solid
Shape thing solid accumulation at discharge, affects surrounding enviroment, also makes mass efficient resource be wasted simultaneously, is not inconsistent joint
Source recycles this national policy.Recycling for realizing the maximum resource of brine sludge garbage, minority enterprise is to change
Salt refining technique is improved, and crude brine carries out demagging, deliming step-by-step processing, makes brine sludge be categorized into containing magnesium hydroxide, sulfur
Brine sludge of the acid multiple solid content such as calcium, biological sludge in industrial and composition are the secondary brine sludge of calcium carbonate the most entirely, and as front
Carry, utilize secondary brine sludge to produce precipitated calcium carbonate.
Secondary brine sludge is pasty material at the beginning of being formed, and utilizes secondary brine sludge to produce precipitated calcium carbonate, need to enter secondary brine sludge
Row dehydration, drying and processing, and the light calcium carbonate product meeting user's request is formed through granularity process.In ammonia-soda process soda industry
In utilize secondary brine sludge produce precipitated calcium carbonate technology applied, the many employings of its production technology " brine sludge filter pressing-centrifugal rinsing-
Drying-pulverizing-screening-surface-active-treatment " method, produce special carbonate of lime, plastic filler precipitated calcium carbonate.Although
Technological process is relatively reasonable, but in device functions of the equipments take the most reasonable: the brine sludge after filter pressing becomes bulk, is unfavorable for brine sludge
Washing fall chlorine and follow-up drying, sorting, and filter pressing, centrifugal rinsing plant running cost are the highest；Use " pulverizing-screening " technique
Flow process, for processing thin material, effect is got half the result with twice the effort, and Task-size Controlling difficulty is very big；The lightweight carbon that screening granularity is extremely low
During acid calcium powder material, the phenomenon that mesh blocks easily occurs, affects screening effect.
Summary of the invention
It is an object of the invention to provide the secondary brine sludge that utilizes that a kind of system energy consumption is low, wet stock particle dispersion is good to give birth to
Produce device and the production method of precipitated calcium carbonate.
The present invention adopts the following technical scheme that
A kind of device utilizing secondary brine sludge to produce precipitated calcium carbonate, including fall chlorine bucket, thickener, winnower, sedimentation tank, drops chlorine
The secondary brine sludge outlet of bucket is connected with the secondary brine sludge inlet of thickener, the secondary brine sludge thick slurry of thickener export and from
The inlet of scheming connects, and the precipitated calcium carbonate wet stock outlet of centrifuge is connected with the charging aperture of drying machine, drying machine
Dry powder outlet is connected with the feeding mouth of flour mill and/or winnower.
This device compared with prior art, has the advantage that, 1) static device (fall chlorine bucket, thickener), is used to realize
Secondary brine sludge fall chlorine, it is to avoid high energy consumption is centrifuged the use of fall chlorine equipment；2) static device (fall chlorine bucket, thickener), is used first
Secondary brine sludge is carried out stiff process, improves secondary brine sludge dehydration equipment disposal ability；3) centrifuge, is utilized to replace filter pressing
Machine, reduces wet stock and connects a phenomenon, makes wet stock dispersibility improve；4), use flour mill, winnower coordinated production, make product
Product granularity and distribution controllability thereof improve.
The preferred version that this device is used is:
The offgas outlet of drying machine is connected with the air inlet of scrubbing tower；The filtrate (liquid of centrifuge and the scrubbing tower feed liquor of scrubbing tower
Mouth connects；The cleaning mixture outlet of scrubbing tower is connected with the import of sedimentation tank.
The underflow outlet of sedimentation tank is connected with the inlet from the machine of receipts, the purified liquor outlet of sedimentation tank respectively with the washing of chlorine bucket is dropped
Wash wastewater outlet to connect with the purified liquor outlet of thickener.
It is provided with fresh water import on fall chlorine bucket, centrifuge is provided with steam inlet and condensation-water drain.
The production method of the present invention adopts the following technical scheme that
Production method, is carried out as follows:
, be delivered to secondary brine sludge raw slurry to drop in chlorine bucket, utilize fresh water that it is carried out drop chlorine remove impurity and process, drop chlorine remove impurity
After secondary salt slurry liquid be used as subsequent sedimentation stiff process raw material, washing process formed washes return production system；
, fall chlorine remove impurity after secondary salt slurry liquid enter thickener carry out settle stiff process, it is achieved secondary brine sludge fall increasing
Dense, thick slurry is used as the raw material producing precipitated calcium carbonate wet stock, and clear liquid returns production system；
, secondary salt mud after enrichment enter centrifuge and carry out solid-liquid separation, the centrifugal wet stock formed is used as production lightweight
The raw material of calcium carbonate dry powder, the filtrate of formation is used as the washings of subsequent handling scrubbing tower；
, secondary salt mud centrifugation formed wet mash enter drying machine dry, formed dry mash；Drying course
Thermal source is steam, and the condensed water formed after steam heat-exchanging returns boiler, for again preparing steam；Precipitated calcium carbonate dry mash goes
Next procedure, the dust that dry run is formed enters scrubbing tower, with the centrifugal filtrate formed, it is carried out cleaning dust, formation
Cleaning mixture returns in centrifuge through sedimentation tank precipitation process, underflow material, and washes, stiff that clear liquid is formed with fall chlorine are formed
Clear liquid together return production system；
, secondary brine sludge dry mash enter winnower system, carry out cracking and sorting；Or entrance flour mill, carry out grinding process；Or
The aidr bells blast system that is partially in secondary brine sludge carries out cracking and sorting, and another part enters flour mill and carries out grinding process；
, the finished product after broken and after grinding is packed.
This production method, first carries out dropping chlorine remove impurity, stiff, solid-liquid separation process, and solve in prior art after filter pressing
Brine sludge becomes bulk, brine sludge filter pressing and centrifugal rinsing process operation high in cost of production problem；Use selecting crude drugs with winnower, two kinds of technology of grinding simultaneously,
Solve the problems such as " pulverizing-screening " weak effect, the control of granularity difficulty, easy network blocking of screening installation.Compared with prior art, this method
There is the advantages such as system energy consumption is low, production cost is low, particle size range is controlled, good product quality.
The preferred version of the inventive method is:
Described stepIn, the thermal source of drying machine drying course is steam, and the condensed water formed after steam heat-exchanging returns boiler, uses
In again preparing steam.
Finished product after Po Sui and the finished product after grinding are packed respectively, or broken after finished product and finished product mixing bag after grinding
Dress.
StepIn, regulation separator and the treating capacity of flour mill respectively, it is achieved the adjustment of product granularity scope.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings and embodiment describe in detail the present invention:
A kind of device utilizing secondary brine sludge to produce precipitated calcium carbonate, sees accompanying drawing 1, in figure: drops chlorine bucket 1, thickener 2, be centrifuged
Machine 3, drying machine 4, flour mill 5, winnower 5, scrubbing tower 7, sedimentation tank 8.
2 two salt mud inlets of secondary salt slurry outlet and thickener of fall chlorine bucket 1 are corresponding to be connected；The two of thickener 2
The outlet of secondary brine sludge thick slurry uses hydrocone type blade construction with centrifuge 3(centrifuge) the corresponding connection of inlet；Centrifuge 3
Precipitated calcium carbonate wet stock outlet is corresponding with the charging aperture of drying machine 4 to be connected, the filtrate (liquid of centrifuge 3 and scrubbing tower 8
Cleaning mixture import correspondence connects；Dry mash outlet (dry mash export equipped with three-way valve structure) of drying machine 4 respectively with flour mill 5
And/or the feeding mouth correspondence of winnower 6 connects, the offgas outlet of drying machine 4 is corresponding with the air inlet of scrubbing tower 7 to be connected, and is dried
Machine also has steam inlet, condensation-water drain, is respectively used to introduce heat source stream and discharge steam condensate (SC)；The washing of scrubbing tower 7
Liquid outlet is corresponding with the import of sedimentation tank 8 to be connected；The underflow outlet of sedimentation tank 8 is corresponding with the inlet of centrifuge 3 to be connected, heavy
The purified liquor outlet in pond, shallow lake 8 is interconnected with washes outlet, the purified liquor outlet of thickener 2 of fall chlorine bucket 1.
Fall chlorine bucket 1 processes for secondary salt mud carries out fall chlorine；Thickener 2 is for entering the secondary salt mud after fall chlorine
Row stiff processes, and secondary salt mud is divided into the secondary brine sludge enrichment serosity that can be used for producing precipitated calcium carbonate and is used for reclaiming
The clear liquid produced；Centrifuge 3, for secondary brine sludge enrichment serosity is carried out solid-liquid separation process, is split into precipitated calcium carbonate wet
Material and the filtrate need to reclaimed for producing；Drying machine 4 is for being dried process to precipitated calcium carbonate wet stock；Scrubbing tower 7
Use countercurrent washing method (scrubbing tower 7 uses the structure of bottom feed, top spray, and countercurrently efficiency is high) to wet stock dry run
The dust-containing tail gas of middle formation carries out dust removal process；Sedimentation tank 8 is used for scrubbing-and-drying unit being that its cleaning mixture formed carries out solid-liquid
Separating treatment；Flour mill 5 and winnower 6, be used for adjusting precipitated calcium carbonate dry material and carry out granularity and distribution thereof, formed and meet visitor
The light calcium carbonate product of family demand.
A kind of method utilizing said apparatus system to produce precipitated calcium carbonate, is carried out as follows:
(flow is approximately 12m to secondary brine sludge raw slurry3/ h, sedimentation rate about 95%, CaCO3Mass content about 23%, NaCl content
About 103tt) enter in fall chlorine bucket 1, it carries out dropping chlorine remove impurity process, the secondary salt slurry liquid after fall chlorine remove impurity to utilize fresh water
(flow is 35m3/ h, sedimentation rate about about 40%, CaCO3Mass content about 10%, NaCl content 14.5tt) it is used as subsequent sedimentation
Stiff processes raw material, and the washes that washing process is formed returns production system.
Secondary salt slurry liquid after fall chlorine remove impurity enters thickener 2 and carries out settling stiff process, it is achieved secondary brine sludge fall
Enrichment, (flow is 12m to thick slurry3/ h, sedimentation rate 88%, CaCO3Mass content 26%, NaCl content 14.5tt) it is used as production
The raw material of precipitated calcium carbonate wet stock, clear liquid returns production system.
Secondary salt mud after enrichment enters siphon scraper centrifugal machine 3 and carries out solid-liquid separation, and the centrifugal wet stock formed is (wet
Inventory is 6t/h, aqueous 15%, NaCl content 14.5tt) it is used as the raw material producing precipitated calcium carbonate dry mash, the filtrate of formation
Washings as subsequent handling scrubbing tower.
The wet mash that secondary salt mud centrifugation is formed enters drying machine 4 and dries, and forms dry mash (dry doses
It is 5t/h, NaCl mass content 0.3%, other impurity contents 2.5%)；The thermal source of drying course is that (flow is 3t/h to steam, pressure
Power is 0.65MPa, and temperature is 225 DEG C) (flow is 3t/h, and pressure is 0.65MPa, temperature for the condensed water that formed after steam heat-exchanging
It is 225 DEG C) return boiler, for again preparing steam；Precipitated calcium carbonate dry mash goes next procedure, the powder that dry run is formed
Dirt enters scrubbing tower 7, with the centrifugal filtrate formed, it is carried out cleaning dust, the cleaning mixture of formation through sedimentation tank 8 precipitation process,
Underflow material returns in siphon scraper centrifugal machine 3, and washes, the clear liquid of stiff formation that clear liquid is formed with fall chlorine together return
Production system.
According to the needs of production product, secondary brine sludge dry mash is partly into winnower system, and it is carried out broken wind
Choosing, forms selecting crude drugs with winnower product；Another part enters flour mill system, and it is carried out grinding process, forms mill product.Or, two
Secondary salt mud dry powder only enters aidr bells blast system, and it is carried out broken selecting crude drugs with winnower, or, secondary salt mud dry powder only enters powder flour mill system
System, carries out grinding process.
Can be according to customer demand two winnower 6 of regulation and/or the treating capacity of flour mill 5, it is achieved product granularity scope
Adjust, the product formed is packed.
Claims (8)
1. utilize secondary brine sludge to produce a device for precipitated calcium carbonate, including dropping chlorine bucket, thickener, winnower, sedimentation tank, its
It is characterised by: the secondary brine sludge outlet of fall chlorine bucket is connected with the secondary brine sludge inlet of thickener, and the secondary brine sludge of thickener is thick
Thick serum outlet is connected with the inlet of centrifuge, the precipitated calcium carbonate wet stock outlet of centrifuge and the charging aperture of drying machine
Connecting, the dry powder outlet of drying machine is connected with the feeding mouth of flour mill and/or winnower.
The device utilizing secondary brine sludge to produce precipitated calcium carbonate the most according to claim 1, it is characterised in that: drying machine
Offgas outlet with
The air inlet of scrubbing tower connects；The filtrate (liquid of centrifuge is connected with the scrubbing tower inlet of scrubbing tower；Washing of scrubbing tower
Wash liquid outlet to be connected with the import of sedimentation tank.
The device utilizing secondary brine sludge to produce precipitated calcium carbonate the most according to claim 1, it is characterised in that: sedimentation tank
Underflow outlet is connected with the inlet from the machine of receipts, and the purified liquor outlet of sedimentation tank exports and stiff with the washes dropping chlorine bucket respectively
The purified liquor outlet connection of device.
The device utilizing secondary brine sludge to produce precipitated calcium carbonate the most according to claim 1, it is characterised in that: on fall chlorine bucket
It is provided with fresh water import, centrifuge is provided with steam inlet and condensation-water drain.
5. the life of the device utilizing secondary brine sludge to produce precipitated calcium carbonate as described in any one in Claims 1-4
Product method, is carried out as follows:
, be delivered to secondary brine sludge raw slurry to drop in chlorine bucket, utilize fresh water that it is carried out drop chlorine remove impurity and process, drop chlorine remove impurity
After secondary salt slurry liquid be used as subsequent sedimentation stiff process raw material, washing process formed washes return production system；
, fall chlorine remove impurity after secondary salt slurry liquid enter thickener carry out settle stiff process, it is achieved secondary brine sludge fall increasing
Dense, thick slurry is used as the raw material producing precipitated calcium carbonate wet stock, and clear liquid returns production system；
, secondary salt mud after enrichment enter centrifuge and carry out solid-liquid separation, the centrifugal wet stock formed is used as production lightweight carbon
The raw material of acid calcium dry mash, the filtrate of formation is used as the washings of subsequent handling scrubbing tower；
, secondary salt mud centrifugation formed wet mash enter drying machine dry, formed dry mash；Drying course
Thermal source is steam, and the condensed water formed after steam heat-exchanging returns boiler, for again preparing steam；Precipitated calcium carbonate dry mash goes
Next procedure, the dust that dry run is formed enters scrubbing tower, with the centrifugal filtrate formed, it is carried out cleaning dust, formation
Cleaning mixture returns in centrifuge through sedimentation tank precipitation process, underflow material, and washes, stiff that clear liquid is formed with fall chlorine are formed
Clear liquid together return production system；
, secondary brine sludge dry mash enter winnower system, carry out cracking and sorting；Or entrance flour mill, carry out grinding process；Or
The aidr bells blast system that is partially in secondary brine sludge carries out cracking and sorting, and another part enters flour mill and carries out grinding process；
F, the finished product after broken and after grinding is packed.
Production method the most according to claim 5, it is characterised in that: described stepIn, the thermal source of drying machine drying course
For steam, the condensed water formed after steam heat-exchanging returns boiler, for again preparing steam.
Production method the most according to claim 1, it is characterised in that: the finished product after Po Sui and the finished product after grinding wrap respectively
Dress, or broken after finished product and finished product after grinding hybrid packed.
Production method the most according to claim 1, it is characterised in that: stepIn, regulation separator and flour mill respectively
Treating capacity, it is achieved the adjustment of product granularity scope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610610455.4A CN106044822A (en) | 2016-07-29 | 2016-07-29 | Device and production method for producing light calcium carbonate by using secondary salt slurry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610610455.4A CN106044822A (en) | 2016-07-29 | 2016-07-29 | Device and production method for producing light calcium carbonate by using secondary salt slurry |
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| CN106044822A true CN106044822A (en) | 2016-10-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610610455.4A Pending CN106044822A (en) | 2016-07-29 | 2016-07-29 | Device and production method for producing light calcium carbonate by using secondary salt slurry |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109292806A (en) * | 2018-11-09 | 2019-02-01 | 长沙万荣粉体设备科技有限公司 | A kind of calcium carbonate slurry process and treat system and method |
| CN112456832A (en) * | 2020-12-09 | 2021-03-09 | 泰安燊豪化工有限公司 | Treatment method of salt mud containing high calcium sulfate |
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| CN101837997A (en) * | 2010-04-30 | 2010-09-22 | 汪晋强 | Method for preparing magnesium carbonate and co-producing sodium carbonate and calcium sulfate from soda ash salt mud |
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2016
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| CN101837997A (en) * | 2010-04-30 | 2010-09-22 | 汪晋强 | Method for preparing magnesium carbonate and co-producing sodium carbonate and calcium sulfate from soda ash salt mud |
| CN102070163A (en) * | 2010-04-30 | 2011-05-25 | 汪晋强 | Method for preparing magnesium carbonate to co-produce calcium carbonate and sodium sulfate by using pure alkali waste salt sludge |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109292806A (en) * | 2018-11-09 | 2019-02-01 | 长沙万荣粉体设备科技有限公司 | A kind of calcium carbonate slurry process and treat system and method |
| CN112456832A (en) * | 2020-12-09 | 2021-03-09 | 泰安燊豪化工有限公司 | Treatment method of salt mud containing high calcium sulfate |
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Application publication date: 20161026 |