CN216039108U - Cellulose ether evaporation centrifugation mother liquor salt residue separation and cellulose ether remove device - Google Patents
Cellulose ether evaporation centrifugation mother liquor salt residue separation and cellulose ether remove device Download PDFInfo
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- CN216039108U CN216039108U CN202122230067.2U CN202122230067U CN216039108U CN 216039108 U CN216039108 U CN 216039108U CN 202122230067 U CN202122230067 U CN 202122230067U CN 216039108 U CN216039108 U CN 216039108U
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Abstract
The utility model discloses a cellulose ether evaporation and centrifugation mother liquor salt residue separation and cellulose ether removal device, which particularly relates to the field of wastewater treatment and comprises a residue extraction machine, wherein an overflow port at the upper part of the residue extraction machine is connected with a mother liquor tank, an overflow port of the mother liquor tank is connected with a mother liquor sedimentation tank, the mother liquor sedimentation tank is connected with a liquid inlet of a self-draining tank, a liquid outlet of the self-draining tank is connected with an inlet of a mother liquor pump, an outlet of the mother liquor pump is connected with a liquid inlet of a mother liquor flocculation tank, a liquid outlet at the lower part of the mother liquor flocculation tank is connected with an inlet of a mother liquor intermediate pump, an outlet of the mother liquor pump is connected with an inlet of a mother liquor filter press, a liquid outlet of the mother liquor filter press is respectively connected with a mother liquor flocculation tank and a mother liquor treatment clear liquor tank, a liquid outlet of the mother liquor treatment clear liquor tank is connected with an inlet of the mother liquor clear liquor pump, and an outlet of the mother liquor clear liquor pump is connected with an evaporation system.
Description
Technical Field
The utility model relates to the field of wastewater treatment, in particular to a device for separating salt residues of cellulose ether evaporation centrifugal mother liquor and removing cellulose ether.
Background
The waste water produced in cellulose ether production causes great pollution to the environment, so that the waste water needs to be effectively treated, and the multi-effect evaporation operation is one of the cellulose ether waste water treatment methods which are commonly used at home and abroad.
After the cellulose ether wastewater is subjected to multi-effect evaporation concentration, sodium chloride salt can be separated out from the concentrated solution, the granularity of the separated salt is not uniform, and after centrifugal separation by a centrifugal machine, the mother solution still contains small-particle sodium chloride salt and cellulose ether. The mother liquor is returned to the evaporator to be evaporated, and the solid salt and the cellulose ether in the mother liquor are removed as much as possible to reduce the accumulation of the solid salt and the cellulose ether in the evaporator.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model provides a device for separating salt residues of a multi-effect evaporation centrifugal mother liquor of cellulose ether and removing the cellulose ether. The main process steps are as follows: extracting residue, settling, flocculating, filter-pressing, and returning the treated mother liquor to the evaporator for continuous evaporation.
In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a cellulose ether multiple-effect evaporation centrifugation mother liquor salt sediment separation and cellulose ether remove device, centrifugation mother liquor pass through slag extractor, mother liquor cistern, mother liquor sedimentation tank, mother liquor flocculation tank, mother liquor treatment clear liquid jar in proper order, accomplish the getting rid of salt sediment and cellulose ether through four steps of slag extraction, subside, flocculation, filter-pressing respectively, then return evaporation system.
Slag extraction: the centrifugal mother liquor flows into the slag extractor from the outlet of the centrifugal machine, the salt particles which are not centrifuged sink to the bottom of the slag extractor under the action of gravity, are lifted and scraped by the scraper at the bottom, and the liquid flows out from the overflow port at the upper part of the liquid storage hopper.
Wherein, adopt chain connection between each scraper blade, be the fretwork between two adjacent scraper blades, the salt grain can fall into and carry sediment machine bottom to be scraped.
And (3) settling: the overflow port on the upper part of the slag extractor is connected with the mother liquid tank, mother liquid flows into the mother liquid tank to be settled to remove partial salt particles, the overflow port of the mother liquid tank is connected with the mother liquid settling tank, and the mother liquid in the mother liquid tank flows into the mother liquid settling tank to further settle and separate solid salt.
The mother liquor tank is divided into three compartments, and mother liquor overflows from a first compartment to a next compartment in sequence. The mother liquor sedimentation tank is divided into two compartments, and the mother liquor sedimentation tank is an underground tank.
Flocculation: the mother liquor sedimentation tank is connected with the self-draining tank liquid inlet, the self-draining tank liquid outlet is connected with the mother liquor pump inlet, the mother liquor pump outlet is connected with the mother liquor flocculation tank liquid inlet, and the flocculating agent is connected with the mother liquor flocculation tank liquid inlet through a pipeline. And (3) feeding the mother liquor in the mother liquor sedimentation tank into a mother liquor flocculation tank through a self-guiding tank and a mother liquor pump, starting stirring, heating the mother liquor to 60-70 ℃, adding a certain amount of flocculant while stirring, and flocculating the cellulose ether which cannot be settled so as to facilitate subsequent filter pressing.
Wherein, mother liquor flocculation tank jacket connects steam conduit, controls the temperature of liquid through the thermometer in the mother liquor flocculation tank, and mother liquor flocculation tank sets up the agitator, mixes flocculating agent and mother liquor through the stirring.
And (3) filter pressing: mother liquor flocculation tank lower part liquid outlet links to each other with the import of mother liquor intermediate pump, and the export of mother liquor intermediate pump links to each other with the import of mother liquor pressure filter, and mother liquor pressure filter liquid outlet links to each other with mother liquor flocculation tank and mother liquor treatment clear solution jar respectively, and mother liquor treatment clear solution jar liquid outlet links to each other with the import of mother liquor clear solution pump, and mother liquor clear solution pump export links to each other with evaporation system. The liquid flocculated in the mother liquid flocculation tank is pumped into a mother liquid filter press by a mother liquid intermediate pump to filter press and remove flocculates, and the filtrate flows into a mother liquid treatment clear liquid tank and then is pumped back to a multi-effect evaporation system by a mother liquid clear liquid pump to continue evaporation.
And when the filtrate is clear, the filtrate is discharged into a mother liquor treatment clear liquor tank for further treatment.
The beneficial effects produced by the utility model are as follows: the device for separating the salt residues of the multi-effect evaporation centrifugal mother liquor of cellulose ether and removing the cellulose ether is provided, the centrifugal mother liquor is treated by adopting a method for removing salt by sedimentation and removing the cellulose ether by flocculation, most of the salt residues and the cellulose ether are separated, and the accumulation of solid salt and the cellulose ether in an evaporator is reduced.
Drawings
Fig. 1 is a schematic view of the main body of the present invention.
In the figure: 1. a slag extractor; 2. a mother liquor tank; 3. a mother liquor sedimentation tank; 4. a self-priming tank; 5. a mother liquor pump; 6. A mother liquor flocculation tank; 7. a mother liquor intermediate pump; 8. a mother liquor filter press; 9. a mother liquor treatment clear liquid tank; 10. mother liquor clear liquid pump; 11. a flow meter; 12. a steam regulating valve.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, and it should be understood that the embodiments described herein are merely for the purpose of illustrating and explaining the present invention and are not intended to limit the present invention.
Example (b):
as shown in fig. 1, centrifugal mother liquor flows into slag extractor 1 from the centrifuge outlet, slag extractor 1 upper portion overflow mouth links to each other with mother liquor tank 2, mother liquor tank 2 overflow mouth links to each other with mother liquor sedimentation tank 3, mother liquor sedimentation tank 3 with link to each other from leading jar 4 inlet, from leading jar 4 liquid outlet and mother liquor pump 5 import and linking to each other, mother liquor pump 5 export links to each other with mother liquor flocculation jar 6 inlet, the flocculating agent passes through the pipeline and links to each other with mother liquor flocculation jar 6 inlet, 6 lower part liquid outlets of mother liquor flocculation jar link to each other with 7 imports of mother liquor intermediate pump, 7 exports of mother liquor intermediate pump link to each other with 8 imports of mother liquor pressure filter, 8 liquid outlets of mother liquor pressure filter link to each other with mother liquor flocculation jar 6 and mother liquor treatment clear liquor jar 9 respectively, 9 liquid outlets of mother liquor treatment clear liquor pump 10 imports and links to each other, 10 exports of mother liquor clear liquor pump link to each other with the vaporization system.
The mother liquor flocculation tank 6 is connected with a steam pipeline in a jacket manner, a steam regulating valve 12 is arranged on the pipeline, and the temperature of the liquid is controlled by a thermometer in the mother liquor flocculation tank 6; the mother liquor flocculation tank 6 is provided with a stirrer, and the flocculant and the mother liquor are mixed by stirring.
Wherein a flow meter 11 is arranged on the flocculant adding pipeline to record the adding amount of the flocculant in each batch.
The utility model is illustrated below with reference to specific examples:
the cellulose ether wastewater is evaporated and centrifuged to obtain mother liquor, wherein the flow rate is 12000kg/h, the temperature is 55 ℃, the salt content is 28 percent, and the cellulose ether content is 2.2 percent. Firstly, the cellulose ether wastewater enters a residue extraction machine 1, large-particle salt sinks to the bottom of the residue extraction machine, the large-particle salt is lifted and scraped by a scraper at the bottom, and liquid flows out from an upper overflow port of a liquid storage hopper.
Wherein, the width of the scraper of the slag extractor 1 is 490mm, the height is 50mm, and the lifting height is 1.6 m.
Mother liquor flowing out of an overflow port at the upper part of the slag extractor 1 flows into a mother liquor tank 2 to be settled to remove partial salt particles, and the mother liquor flows out of the overflow port at the upper part and enters a mother liquor settling pond 3 to be further settled.
Wherein, the size of the mother liquid tank 2 is 3000 multiplied by 1500(mm, length multiplied by width multiplied by height), and the spacing of the partition boards is 1 m; the size of the mother liquor sedimentation tank 3 is 2760X 1000X 1500(mm, length X width X height).
And (3) conveying the mother liquor in the mother liquor sedimentation tank 3 into a mother liquor flocculation tank 6 through a self-guiding tank 4 and a mother liquor pump 5, starting stirring, heating the mother liquor to 70 ℃, adding 200L of 20% polyacrylamide solution serving as a flocculating agent while stirring, and keeping the temperature for 15 min.
Wherein the volume of the self-guiding tank 4 is 0.23m3The flow rate of the mother liquor pump 5 is 12.5m3H, head 32 m. The diameter of the mother liquor flocculation tank 6 is
The volume is 6.3m3。
The flocculated liquid in the mother liquor flocculation tank 6 is pumped into a mother liquor filter press 8 through a mother liquor intermediate pump 7 to be filter-pressed to remove flocculates, the filtrate flows into a mother liquor treatment clear liquid tank 9, and the content of cellulose ether is reduced to 0.12 percent. The mother liquor is then sent to the evaporation system via a mother liquor clear liquor pump 10.
Wherein, the flow of the mother liquor intermediate pump 7 is 25m3H, the lift is 70 m; the model of the mother liquor filter press is XAZ50/800-UI, and the specification of the filter cloth is 400 meshes; the size of the mother liquor treatment clear liquid tank 9 is
The lower part is a conical bottom; the flow of the mother liquor clear liquid pump 10 is 12.5m3H, head 50 m.
Claims (7)
1. The utility model provides a cellulose ether evaporation centrifugation mother liquor salt sediment separation and cellulose ether remove device, its characterized in that, including carrying sediment machine (1), carry sediment machine (1) upper portion overflow mouth and mother liquor groove (2) and link to each other, mother liquor groove (2) overflow mouth links to each other with mother liquor sedimentation tank (3), mother liquor sedimentation tank (3) with link to each other from drawing jar (4) inlet, draw jar (4) liquid outlet and mother liquor pump (5) import and link to each other, mother liquor pump (5) export links to each other with mother liquor flocculation tank (6) inlet, mother liquor flocculation tank (6) lower part liquid outlet links to each other with mother liquor intermediate pump (7) import, mother liquor intermediate pump (7) export links to each other with mother liquor pressure filter (8) import, mother liquor pressure filter (8) liquid outlet links to each other with mother liquor flocculation tank (6) and mother liquor treatment clear liquor tank (9) respectively, mother liquor treatment clear liquor tank (9) links to each other with mother liquor pump (10) import, and the outlet of the mother liquid clear liquid pump (10) is connected with an evaporation system.
2. The cellulose ether evaporation and centrifugation mother liquor salt residue separation and cellulose ether removal device as claimed in claim 1, wherein scrapers are arranged at the bottom of the residue extraction machine (1), each scraper is connected with each other by a chain, and each two adjacent scrapers are hollowed out.
3. A cellulose ether evaporation-centrifugation mother liquor salt residue separation and cellulose ether removal device as claimed in claim 1, characterized in that the mother liquor tank (2) is divided into three compartments, and mother liquor overflows from the first compartment to the next compartment in sequence.
4. The cellulose ether evaporation and centrifugation mother liquor salt residue separation and cellulose ether removal device as claimed in claim 1, wherein the mother liquor settling tank (3) is divided into two compartments, and the mother liquor settling tank (3) is an underground tank.
5. The cellulose ether evaporation and centrifugation mother liquor salt residue separation and cellulose ether removal device as claimed in claim 1, characterized in that the mother liquor flocculation tank (6) is provided with a stirrer.
6. The cellulose ether evaporation and centrifugation mother liquor salt residue separation and cellulose ether removal device as claimed in claim 1, wherein the mother liquor flocculation tank (6) is connected with a flocculant through a pipeline, and the flocculant is provided with a flow meter (11) through the pipeline.
7. The cellulose ether evaporation and centrifugation mother liquor salt residue separation and cellulose ether removal device as claimed in claim 1, wherein a thermometer is arranged in the mother liquor flocculation tank (6), the mother liquor flocculation tank (6) is jacketed with a steam pipeline, and a steam regulating valve (12) is arranged on the steam pipeline.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122230067.2U CN216039108U (en) | 2021-09-15 | 2021-09-15 | Cellulose ether evaporation centrifugation mother liquor salt residue separation and cellulose ether remove device |
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| CN202122230067.2U CN216039108U (en) | 2021-09-15 | 2021-09-15 | Cellulose ether evaporation centrifugation mother liquor salt residue separation and cellulose ether remove device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115947470A (en) * | 2022-10-08 | 2023-04-11 | 浙江省海洋水产研究所 | Minced fillet rinsing wastewater treatment system |
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2021
- 2021-09-15 CN CN202122230067.2U patent/CN216039108U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115947470A (en) * | 2022-10-08 | 2023-04-11 | 浙江省海洋水产研究所 | Minced fillet rinsing wastewater treatment system |
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