CN211078673U - PTA refined mother liquor processing apparatus based on membrane filtration technology - Google Patents
PTA refined mother liquor processing apparatus based on membrane filtration technology Download PDFInfo
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- CN211078673U CN211078673U CN201921425846.4U CN201921425846U CN211078673U CN 211078673 U CN211078673 U CN 211078673U CN 201921425846 U CN201921425846 U CN 201921425846U CN 211078673 U CN211078673 U CN 211078673U
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Abstract
The utility model discloses a refined mother liquor processing apparatus of PTA based on membrane filtration technology, include head tank, membrane filter, adsorption column, from handing over post, heat exchanger, wet return and a plurality of pipeline, the delivery outlet of head tank passes through the input port of tube coupling membrane filter, and membrane filter sets up suspended particles and collects mouth, first waste water discharge pipeline and second waste water discharge pipeline, and the water inlet of adsorption column is connected to first waste water discharge pipeline, and second waste water discharge pipeline connects the heat exchanger, and the delivery port of adsorption column and the waste water delivery outlet of heat exchanger all connect the water inlet from handing over the post through the pipeline, connect wet return from the delivery port of handing over the post. The utility model discloses a membrane filter design with two waste water output pipeline, it is as an organic whole to collect suspended particle filtering, adsorb waste water impurity and prevent that the organic matter from appearing the function in the ion exchange resin, has effectively improved the operating efficiency of ion exchange column, need not reverse osmosis design, and it is little to take up an area of, and investment and working costs are low.
Description
Technical Field
The utility model belongs to the technical field of environmental engineering and industrial waste water retrieval and utilization, concretely relates to refined mother liquor processing apparatus of PTA based on membrane filtration technique.
Background
Purified Terephthalic Acid (PTA) is the largest-yielding dicarboxylic Acid, produced primarily from p-xylene, and is the primary feedstock for polyester production. A large amount of waste water can be generated in the PTA production process, and at present, most of organic matters are degraded by adopting a biochemical technology and then discharged after reaching standards, so that the great waste of resources is caused.
Patent CN103896443A describes a method for recycling terephthalic acid refined mother liquor, which adopts flocculation, biochemistry and reverse osmosis combined process, the effluent water meets the requirement of return water of PTA production process, especially the reverse osmosis process can remove all metal ions in the wastewater, and has very good effect. However, due to the addition of the flocculating agent at the early stage, the operation period of the reverse osmosis membrane is greatly influenced, and the flocculating agent is continuously accumulated in a membrane channel due to the fact that the organic membrane cannot be regenerated by strong acid and strong base, and the system cannot continuously and stably operate. Patent CN203429005U provides a set of device of retrieving catalyst and process water in PTA waste water, adopts the combined process of filtration, ion-exchange, reverse osmosis, has certain effect to catalyst recovery, and it is also relatively stable to go out water quality, but the waste water after the filtration directly gets into the ion-exchange system and leads to having a large amount of organic matter crystallization in the ion-exchange bed layer, and the ion-exchange system can't normally operate for a long time. The patent CN102030433A firstly dissolves part of suspended particles by adjusting the PH value, then enters an ion exchange system to remove metal ions, and finally the effluent reaches the requirement of reuse water through reverse osmosis. According to the process, filtration is replaced by a method of dissolving suspended particles by alkali liquor, so that equipment investment is saved, but a large amount of sodium ions cause reduction of reverse osmosis water yield, so that a multi-stage reverse osmosis system needs to be designed, and the system is high in energy consumption and poor in economical efficiency.
SUMMERY OF THE UTILITY MODEL
The technical purpose is as follows: to the technical problem, the utility model provides a refined mother liquor processing apparatus of PTA based on membrane filtration technique, its compact structure, area are little, adopt the membrane filter design that has two waste water output pipelines, collect the suspended particles filtering, adsorb waste water impurity and prevent that the organic matter from appearing the function as an organic whole in the ion exchange resin, effectively improved the operating efficiency from the friendship post, need not the reverse osmosis design, practiced thrift equipment cost, improved the rate of recovery of catalyst and waste water in the refined mother liquor.
The technical scheme is as follows: in order to achieve the technical purpose, the utility model adopts the following technical scheme:
the utility model provides a PTA refining mother liquor processing apparatus based on membrane filtration technique which characterized in that: the device comprises a raw material tank, a membrane filter, an adsorption column, an ion exchange column, a heat exchanger, a water return pipeline and a plurality of pipelines, wherein the raw material tank is used for storing the PTC refined mother liquor, an output port of the raw material tank is connected with an input port of the membrane filter through a pipeline, and the membrane filter is used for separating suspended particles and wastewater in the PTA refined mother liquor; the membrane filter is provided with a suspended particle collecting port, a first wastewater discharge pipeline and a second wastewater discharge pipeline, the first wastewater discharge pipeline is connected with a water inlet of the adsorption column, an adsorption material for adsorbing and separating impurities in wastewater is arranged in the adsorption column, the second wastewater discharge pipeline is connected with a heat exchanger, and the heat exchanger is used for heating wastewater in the second wastewater discharge pipeline; the water outlet of the adsorption column and the wastewater outlet of the heat exchanger are connected with the water inlet of the ion exchange column through pipelines, ion exchange resin used for removing metal ions in wastewater is arranged in the ion exchange column, the water outlet of the ion exchange column is connected with a water return pipeline, and the water return pipeline is used for conveying water obtained after treatment.
Preferably, the first wastewater discharge pipeline and the second wastewater discharge pipeline are both provided with regulating valves for regulating liquid flow.
Preferably, the membrane filter adopts one or more of a ceramic membrane, a silicon carbide membrane or a metal membrane.
Preferably, the membrane filter has a filtration precision of 10 to 500 nm.
Preferably, the membrane filter adopts one or more of cross-flow filtration, dead-end filtration and semi-dead-end filtration.
Preferably, the adsorption material is one or more of activated carbon, macroporous resin or diatomite.
Preferably, the ion-exchange resin is one or more of styrene resin or acrylic resin.
Preferably, the PTA refining mother liquor contains organic suspended particles, soluble organic matters and a plurality of metal ions.
Preferably, the suspended particle collecting port of the membrane filter is connected with the PTA oxidation system.
The technical effects are as follows: due to the adoption of the technical scheme, the utility model discloses following technological effect has:
(1) the utility model discloses a PTA refined mother liquor processing apparatus based on membrane filtration technique area is less, and the adoption all is quiet equipment, and process flow is short, recycles the suspended particles and the water that have the most recovery value in the PTA refined mother liquor in the PTA production system, reduces investment and running cost when reducing discharging, realizes the purpose of waste water cyclic utilization;
(2) the utility model discloses a suspension organic particle is got rid of through the membrane technology, and the clear solution after the suspension particle in the refined waste water is got rid of through membrane filter adopts partial absorption, partial heating, then mixes the mode of inputing in the ion exchange column with preset proportion, becomes the unsaturated state with the dissoluble organic matter in the waste water, has effectively controlled the organic matter and has crystallized and pile up in ion exchange resin, has guaranteed the continuous steady operation of ion exchange column;
(3) and adopt the utility model discloses the device is handled the refined mother liquor of PTA, can realize getting rid of the PTA refining waste water metal ion completely, and water and partial organic matter can directly return to in the production technology, and the metal ion clearance reaches 99%, and the water recovery rate reaches more than 90%, and each item metal index after the waste water treatment is far below the highest content index of cobalt, manganese, iron, nickel and COD in the industry requirement emission standard, goes out the water and can return in the PTA production technology completely.
Drawings
FIG. 1 is a schematic structural diagram of a PTA refining mother liquor treatment device based on membrane filtration technology;
wherein: a raw material tank-1, a membrane filter-2, an adsorption column-3, an ion exchange column-4, a heat exchanger-5, a water return pipeline-6, a suspended particle collecting port-21, a first wastewater discharge pipeline-22 and a second wastewater discharge pipeline-23.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, a PTA refining mother liquor treatment apparatus based on membrane filtration technology comprises a raw material tank 1, a membrane filter 2, an adsorption column 3, an ion exchange column 4, a heat exchanger 5, a water return line 6 and a plurality of pipelines, wherein the raw material tank 1 is used for storing PTC refining mother liquor, an output port of the raw material tank 1 is connected with an input port of the membrane filter 2 through a pipeline, and the membrane filter 2 is used for separating suspended particles and wastewater in the PTA refining mother liquor.
The membrane filter 2 is provided with a suspended particle collecting port 21, a first wastewater discharge pipeline 22 and a second wastewater discharge pipeline 23, the first wastewater discharge pipeline 22 is connected with a water inlet of the adsorption column 3, an adsorption material used for adsorbing and separating impurities in wastewater is arranged in the adsorption column 3, the second wastewater discharge pipeline 23 is connected with the heat exchanger 5, and the heat exchanger 4 is used for heating wastewater in the second wastewater discharge pipeline 23.
The water outlet of the adsorption column 3 and the wastewater outlet of the heat exchanger 5 are both connected with the water inlet of the ion exchange column 4 through pipelines, ion exchange resin for removing metal ions in wastewater is arranged in the ion exchange column 4, the water outlet of the ion exchange column 4 is connected with a water return pipeline 6, and the water return pipeline 6 is used for conveying water obtained after treatment.
Specifically, the first wastewater discharge pipeline 22 and the second wastewater discharge pipeline 23 are both provided with a regulating valve for regulating the flow of liquid, so as to regulate the proportion of wastewater entering the ion exchange column through the two pipelines. The accessible sets up sampling device at the water inlet front end of leaving the intersection post for detect the content of the organic matter in the waste water after mixing, adjust suitable size through the aperture of the governing valve of debugging on with two waste water discharge line, ensure that the resolvable organic matter in the waste water after mixing is unsaturated state.
The utility model discloses generally contain organic suspended particles in the refined mother liquor of well PTA, dissolubility organic matter and multiple metal ion, membrane filter 2 can adopt ceramic membrane, one or several kinds in carborundum film or the metal film, the filtration form that membrane filter 2 adopted is cross-flow filtration, dead end filters and one or several kinds in the filtration of half dead end, the filter fineness of preferred membrane filter 2 is 10-500nm, membrane filter 2's suspended particles collection mouth 21 is connected the PTA oxidation system, realize going in the organic suspended particles recycle to the PTA technology of collecting promptly.
Specifically, the adsorption material can adopt one or more of activated carbon, macroporous resin or diatomite, and the ion-exchange resin adopts one or more of styrene resin or acrylic resin.
Embodiment one to four are adopting the utility model discloses a refined mother liquor processing apparatus of PTA carries out the embodiment of handling to the refined mother liquor of PTA based on membrane filtration technique.
The first embodiment is as follows:
the PTA refining mother liquor firstly passes through a ceramic membrane system with the precision of 50nm, a cross-flow filtration mode is adopted, and the filtered water is obtained according to the weight ratio of 1: 1 proportion respectively enters an adsorption column and a heat exchanger, active carbon is filled in the adsorption column, the temperature of the heat exchanger is set to be 70 ℃, the adsorption column and the heat exchanger effluent are mixed and then enter an ion exchange column, styrene resin is filled in the resin column, and the operation period of the ion exchange resin column under the process condition is 5 days.
Example two:
the PTA refining mother liquor firstly passes through a metal film system with the precision of 500nm, a dead-end filtration mode is adopted, and the filtered water is obtained according to the weight ratio of 1: 2, respectively feeding the mixture into an adsorption column and a heat exchanger, wherein the adsorption column is filled with adsorption resin, the temperature of the heat exchanger is set to be 80 ℃, the adsorption column and the heat exchanger effluent are mixed and then enter an ion exchange column, styrene resin is filled in the resin column, and the operation period of the ion exchange resin column under the process condition is 5 days.
Example three:
the PTA refining mother liquor firstly passes through a silicon carbide film system with the precision of 10nm, adopts a semi-dead-end form, and filtered water is obtained according to the weight ratio of 1: and 3, respectively entering an adsorption column and a heat exchanger in proportion, filling diatomite into the adsorption column, setting the temperature of the heat exchanger to be 90 ℃, mixing the adsorption column with the effluent of the heat exchanger, and then entering an ion exchange column, wherein acrylic resin is filled in the resin column. The operation period of the ion exchange resin column under the process condition is 3 days.
Example four:
the PTA refining mother liquor firstly passes through a silicon carbide film system with the precision of 10nm, a cross-flow filtration mode is adopted, and the filtered water is obtained according to the weight ratio of 1: 1, respectively entering an adsorption column and a heat exchanger, filling adsorption resin in the adsorption column, setting the temperature of the heat exchanger to be 90 ℃, mixing the adsorption and the effluent of the heat exchanger, and then entering an ion exchange column, wherein styrene resin is filled in the resin column. The operation period of the ion exchange resin column under the process condition is 7 days.
The water discharge indexes of the first to fourth examples are shown in the following table 1:
TABLE 1
From last table 1 can see, adopt the utility model discloses a device is handled PTA refined mother liquor, and each item metal index after the PTA waste water treatment can accord with the standard that the industry required emission better, is far below the highest content index of cobalt, manganese, iron, nickel and COD in the standard.
The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.
Claims (9)
1. The utility model provides a PTA refining mother liquor processing apparatus based on membrane filtration technique which characterized in that: the device comprises a raw material tank (1), a membrane filter (2), an adsorption column (3), an ion exchange column (4), a heat exchanger (5), a water return pipeline (6) and a plurality of pipelines, wherein the raw material tank (1) is used for storing the PTC refined mother liquor, an output port of the raw material tank (1) is connected with an input port of the membrane filter (2) through a pipeline, and the membrane filter (2) is used for separating suspended particles and wastewater in the PTA refined mother liquor; the membrane filter (2) is provided with a suspended particle collecting port (21), a first wastewater discharge pipeline (22) and a second wastewater discharge pipeline (23), the first wastewater discharge pipeline (22) is connected with a water inlet of the adsorption column (3), an adsorption material for adsorbing and separating impurities in wastewater is arranged in the adsorption column (3), the second wastewater discharge pipeline (23) is connected with a heat exchanger (5), and the heat exchanger (5) is used for heating wastewater in the second wastewater discharge pipeline (23); the water outlet of the adsorption column (3) and the wastewater outlet of the heat exchanger (5) are connected with the water inlet of the ion exchange column (4) through pipelines, ion exchange resin used for removing metal ions in wastewater is arranged in the ion exchange column (4), the water outlet of the ion exchange column (4) is connected with a water return pipeline (6), and the water return pipeline (6) is used for conveying water obtained after treatment.
2. The apparatus of claim 1, wherein the membrane filtration technology-based PTA refining mother liquor treatment apparatus comprises: and the first wastewater discharge pipeline (22) and the second wastewater discharge pipeline (23) are both provided with regulating valves for regulating the flow of liquid.
3. The apparatus of claim 1, wherein the membrane filtration technology-based PTA refining mother liquor treatment apparatus comprises: the membrane filter (2) adopts one or more of a ceramic membrane, a silicon carbide membrane or a metal membrane.
4. The apparatus of claim 1, wherein the membrane filtration technology-based PTA refining mother liquor treatment apparatus comprises: the filtering precision of the membrane filter (2) is 10-500 nm.
5. The apparatus of claim 1, wherein the membrane filtration technology-based PTA refining mother liquor treatment apparatus comprises: the membrane filter (2) adopts one or more of cross-flow filtration, dead-end filtration and semi-dead-end filtration.
6. The apparatus of claim 1, wherein the membrane filtration technology-based PTA refining mother liquor treatment apparatus comprises: the adsorption material is one or more of active carbon, macroporous resin or diatomite.
7. The apparatus of claim 1, wherein the membrane filtration technology-based PTA refining mother liquor treatment apparatus comprises: the ion-exchange resin is one or more of styrene resin or acrylic resin.
8. The apparatus of claim 1, wherein the membrane filtration technology-based PTA refining mother liquor treatment apparatus comprises: the PTA refining mother liquor contains organic suspended particles, soluble organic matters and a plurality of metal ions.
9. The apparatus of claim 1, wherein the membrane filtration technology-based PTA refining mother liquor treatment apparatus comprises: the suspended particle collecting port (21) of the membrane filter (2) is connected with the PTA oxidation system.
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| CN2019107605243 | 2019-08-17 | ||
| CN201910760524 | 2019-08-17 |
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| CN211078673U true CN211078673U (en) | 2020-07-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115105858A (en) * | 2022-06-22 | 2022-09-27 | 重庆大学 | ITO etching liquid crystallization suppression device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115105858A (en) * | 2022-06-22 | 2022-09-27 | 重庆大学 | ITO etching liquid crystallization suppression device |
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Address after: 211100 room 708, Haitong building, No. 100, Qinhuai Road, Jiangning Economic and Technological Development Zone, Nanjing, Jiangsu Province Patentee after: Nanjing Hanshen Material Technology Co.,Ltd. Address before: 211151 building D01, Jima Industrial Park, No. 669, Jiangjun Avenue, Jiangning District, Nanjing, Jiangsu Province Patentee before: NANJING IKE CARTER EMISSION TECHNOLOGY CO.,LTD. |
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