CN112759145A - Sterilization process for treating PVC centrifugal mother liquor by ozone - Google Patents
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Abstract
The invention discloses a sterilization process for treating PVC centrifugal mother liquor by ozone, which comprises the following steps: A. uniformly mixing the settled and filtered PVC centrifugal mother liquor with ozone generated by an ozone generator (11) through an ejector (2), and then sending the mixture into a bubbling cyclone oxidation tower for sterilization treatment; B. after ozone sterilization treatment, the PVC centrifugal mother liquor containing ozone overflows into an ultrafiltration water inlet buffer tank (6) to be broken and the ozone is discharged; C. the PVC centrifugal mother liquor with the ozone discharged is sequentially sent into an activated carbon filter (14), an ultrafiltration system (15) and an ultrafiltration effluent buffer tank (9), and finally sent into a reverse osmosis device (16) to be used as fresh water which can enter a PVC centrifugal process again. The sterilization process of the invention removes COD in the PVC centrifugal mother liquor by using the strong oxidizing property of ozone, thereby recycling the centrifugal mother liquor generated in the centrifugal process production, and having the advantages of safety, high efficiency and low operation cost.
Description
Technical Field
The invention belongs to the technical field of environmental protection, particularly relates to a water resource recycling technology in the PVC industry, and particularly relates to a sterilization process for treating PVC centrifugal mother liquor by ozone, which can safely and efficiently recycle the centrifugal mother liquor generated in PVC production.
Background
The environmental protection requirement is increasingly strict, the PVC industry can generate centrifugal mother liquor containing a large amount of COD (chemical oxygen demand) in the production process, the COD not only contains organic matters, but also contains polymers, and the COD is difficult to remove or degrade by a common sterilization process.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a sterilization process for treating PVC centrifugal mother liquor by using ozone, and the sterilization process can safely and efficiently recycle the centrifugal mother liquor generated in PVC production.
The invention aims to solve the problems by the following technical scheme:
a sterilization process for treating PVC centrifugal mother liquor by ozone is characterized in that: the sterilization process comprises the following steps:
A. uniformly mixing the settled and filtered PVC centrifugal mother liquor with ozone generated by an ozone generator through an ejector, and then sending the mixture into a bubbling cyclone oxidation tower for sterilization treatment;
B. after ozone sterilization treatment, the PVC centrifugal mother liquor containing ozone overflows into an ultrafiltration water inlet buffer tank to remove and purify the ozone;
C. the PVC centrifugal mother liquor with the ozone discharged is sequentially sent into an activated carbon filter, an ultrafiltration system and an ultrafiltration water outlet buffer tank, and finally sent into a reverse osmosis device to be used as fresh water which can enter a PVC centrifugal process again.
The bubbling cyclone oxidation tower in the step A is at least divided into two stages, the multistage bubbling cyclone oxidation towers are connected in series, the primary bubbling cyclone oxidation tower is connected with an outlet pipeline of the ejector, and the later stage bubbling cyclone oxidation tower is connected with the primary bubbling cyclone oxidation tower through an overflow pipe and is connected with an ozone generator through an ozone output pipeline with a valve.
And D, the COD in the PVC centrifugal mother liquor subjected to the sterilization treatment of the bubbling cyclone oxidation tower in the step A is lower than 10 mg/L.
The bubbling cyclone oxidation tower in the step A comprises a first-stage bubbling cyclone oxidation tower and a second-stage bubbling cyclone oxidation tower which are connected in series, the inlet end of an ejector is connected with a PVC centrifugal mother liquor input pipe after sedimentation and filtration and is connected with an ozone generator through an ozone output pipeline with a valve, and the outlet pipe of the ejector extends into a cavity below a first-stage catalytic bed of the first-stage bubbling cyclone oxidation tower; the upper part of the first-stage bubbling cyclone oxidation tower is communicated with the second-stage bubbling cyclone oxidation tower through an overflow pipe, and a microporous aeration device positioned below a second-stage catalytic bed in the second-stage bubbling cyclone oxidation tower is connected with an ozone generator through an ozone output pipeline with a valve.
COD in the PVC centrifugal mother liquor subjected to sterilization treatment in the first-stage bubbling cyclone oxidation tower is lower than 15 mg/L; COD in the PVC centrifugal mother liquor subjected to sterilization treatment by the secondary bubbling cyclone oxidation tower is lower than 10 mg/L.
COD in the PVC centrifugal mother liquor subjected to the sterilization treatment of the secondary bubbling cyclone oxidation tower is lower than 5 mg/L.
The first-stage catalytic bed and the second-stage catalytic bed are both provided with metal oxide catalysts, the metal oxide catalysts take aluminum oxide and copper oxide as substrates, and the mass content of the aluminum oxide and the copper oxide in the metal oxide catalysts is not less than 70%.
And a first-stage tower side stirrer is arranged on the first-stage bubbling cyclone oxidation tower plate below the first-stage catalytic bed, and a second-stage tower side stirrer is arranged on the second-stage bubbling cyclone oxidation tower plate below the second-stage catalytic bed.
The gas-liquid ratio of the mixture of the ozone and the PVC centrifugal mother liquor input into the first-stage bubbling cyclone oxidation tower by the ejector is 0.5-1.3m3/m3(ii) a The gas-liquid ratio of the ozone supplied by the ozone generator to the second-stage bubbling cyclone oxidation tower and the ozone-containing PVC centrifugal mother liquor input by the first-stage bubbling cyclone oxidation tower to the second-stage bubbling cyclone oxidation tower is 0.2-0.6m3/m3。
And an oxidation degassing reaction tower is arranged at the top of the second-stage bubbling cyclone oxidation tower, the oxidation degassing reaction tower is communicated with the bottom of the second-stage bubbling cyclone oxidation tower through a mother liquor circulating pipe with an oxidation tower circulating pump, the oxidation tower circulating pump conveys PVC centrifugal mother liquor containing ozone to the oxidation degassing reaction tower to remove redundant ozone, the oxidation degassing reaction tower is connected with an ozone tail gas removing device through a pipeline with a tail gas removing draught fan, or is connected with an ultrafiltration degassing reaction tower arranged on an ultrafiltration water inlet buffer tank in the step B in series through a pipeline to output redundant ozone, and the liquid phase of the oxidation degassing reaction tower returns to the second-stage bubbling cyclone oxidation tower.
And B, a multi-point airflow distribution mechanism connected with a degassing blower through a pipeline is arranged at the bottom of the ultrafiltration water inlet buffer tank in the step B, a degassing overflow tank with the top higher than that of the multi-point airflow distribution mechanism is arranged beside the multi-point airflow distribution mechanism, the degassing overflow tank for blocking the entry of ozone gas is connected with an ultrafiltration degassing reaction tower arranged at the top of the ultrafiltration water inlet buffer tank through a pipeline with an ultrafiltration circulating pump, the liquid phase of the ultrafiltration degassing reaction tower returns to the ultrafiltration water inlet buffer tank, and the gas phase of the ultrafiltration degassing reaction tower is connected with an ozone tail gas breaking device through a pipeline with a tail gas breaking draught fan.
And the activated carbon filter in the step C is communicated with a degassing overflow groove which is arranged at the bottom of the ultrafiltration water inlet buffer groove in the step B and used for isolating the entry of ozone gas through a pipeline with an ultrafiltration liquid inlet pump.
And C, connecting the ultrafiltration effluent buffer tank in the step C with a reverse osmosis device through a pipeline with a reverse osmosis delivery pump, and delivering the treated liquid into the reverse osmosis device through the reverse osmosis delivery pump.
Compared with the prior art, the invention has the following advantages:
the sterilization process removes COD in the PVC centrifugal mother liquor by utilizing the strong oxidizing property of ozone, thereby recycling the centrifugal mother liquor generated in the production of the centrifugal process and achieving the purposes of meeting the environmental protection requirement and reasonably utilizing resources; the sterilization process can safely and efficiently recycle the centrifugal mother liquor generated in the production, and has low operation cost; redundant ozone in the process can be discharged into the ozone tail gas breaking device, and the subsequent processes cannot be influenced.
Drawings
FIG. 1 is a flow chart of the sterilization process for treating the PVC centrifugal mother liquor by ozone.
Wherein: 1-first stage bubbling cyclone oxidation tower; 101-first-stage tower side stirrer; 102-first-stage catalytic bed; 2-ejector; 3-two-stage bubbling cyclone oxidation tower; 301-second stage tower side stirrer; 302-secondary catalyst bed; 303-microporous aeration means; 4-circulating pump of oxidation tower; 5-oxidation degassing reaction tower; 6-ultrafiltration water inlet buffer tank; 601-multipoint airflow distribution mechanism; 602-degassing overflow launder; 7-degassing blower; 8-ultrafiltration liquid inlet pump; 9-an ultrafiltration effluent buffer tank; 10-reverse osmosis delivery pump; 11-an ozone generator; 12-ozone tail gas breaking device; 13-breaking the induced draft fan by tail gas; 14-an activated carbon filter; 15-ultrafiltration system; 16-a reverse osmosis unit; 17-ultrafiltration degassing reaction tower; and 18-ultrafiltration circulating pump.
Detailed Description
The invention is further described with reference to the following figures and examples.
As shown in fig. 1: a sterilization process for treating PVC centrifugal mother liquor by ozone comprises the following steps:
A. in the sterilization process of the centrifugal mother liquor, the PVC centrifugal mother liquor subjected to sedimentation filtration and ozone generated by an ozone generator 11 are uniformly mixed by an ejector 2, the pressure of the ejector 2 is controlled at 0.1MPa, the mixed gas and liquid are sent to a first-stage bubbling cyclone oxidation tower 1, and the gas-liquid ratio in the first-stage bubbling cyclone oxidation tower is 0.5-1.3m3/m3In the first-stage bubbling cyclone oxidation tower 1, a metal oxide catalyst is added on the first-stage catalytic bed 102, the catalyst takes aluminum oxide and copper oxide as matrixes, and is formed by adding palladium, titanium and platinum, wherein the mass content of the aluminum oxide and the copper oxide is not less than 70%, the metal oxide catalyst can further enhance the sterilization effect of ozone, improve the sterilization efficiency and effectively reduce COD in the PVC centrifugal mother liquor; considering that part of organic matters and polymers can be attached to the surface of the metal oxide catalyst in the sterilization process to influence the activity of the metal oxide catalyst, a first-stage tower side stirrer 101 is arranged on a tower plate of a first-stage bubbling cyclone oxidation tower 1, the first-stage tower side stirrer 101 can stir the metal oxide catalyst on a first-stage catalyst bed 102 at a low speed, and the organic matters and the polymers attached to the surface of the metal oxide catalyst are removed by utilizing free friction and impact among the metal oxide catalysts to realize the online activation function in the tower;
B. the PVC centrifugal mother liquor enters a second-stage bubbling cyclone oxidation tower 3 after first-stage sterilization treatmentPerforming secondary sterilization treatment, wherein part of the sterilization ozone in the second-stage bubbling cyclone oxidation tower 3 is redundant ozone in the first-stage bubbling cyclone oxidation tower 1, the redundant ozone is introduced into the second-stage bubbling cyclone oxidation tower 3 through the tower top, the other part of the sterilization ozone enters the second-stage bubbling cyclone oxidation tower 3 through the ozone reactor 11 and the micropore aeration device 303, and the gas-liquid ratio in the second-stage bubbling cyclone oxidation tower 3 is 0.2-0.6m3/m3(ii) a A second-stage tower side stirrer 301 is also arranged on the tower plate of the second-stage bubbling cyclone oxidation tower 3, the second-stage tower side stirrer 301 can stir the metal oxide catalyst on the second-stage catalyst bed 302 at a low speed, and organic matters and polymers attached to the surface of the metal oxide catalyst are removed by utilizing free friction and impact among the metal oxide catalysts;
C. mother liquor subjected to two-stage sterilization treatment flows into an ultrafiltration water inlet buffer tank 6, air is introduced through a multi-point airflow distribution mechanism 601 by using a degassing blower 7, redundant ozone is discharged, and the redundant ozone is discharged into an ozone tail gas breaking device 12 through a tail gas breaking draught fan 13, so that gas ozone finally discharged to the atmosphere is not overproof; an oxidation degassing reaction tower 5 is specially arranged at the top of the second-stage bubbling cyclone oxidation tower 3, an ultrafiltration degassing reaction tower 17 is specially arranged at the top of the ultrafiltration water inlet buffer tank 6, an oxidation tower circulating pump 4 is arranged to extract a certain amount of liquid from the second-stage bubbling cyclone oxidation tower 3 and spray the liquid into the oxidation degassing reaction tower 5 continuously, an ultrafiltration water inlet circulating pump 18 is arranged to extract a certain amount of liquid from the ultrafiltration water inlet buffer tank 6 and spray the liquid into the ultrafiltration degassing reaction tower 17 continuously so as to strengthen the removal effect of ozone in water, the liquid in the degassing reaction tower returns to the corresponding second-stage bubbling cyclone oxidation tower 3 and the ultrafiltration water inlet buffer tank 6, and the gas phase enters an ozone tail gas removal device 12 under the action of a tail gas removal induced draft fan 13;
D. the mother liquor with the ozone removed enters an activated carbon filter 14 through an ultrafiltration liquid inlet pump 8, then enters an ultrafiltration system 15, then flows into an ultrafiltration water outlet buffer tank 9, and finally the treated liquid is sent to a reverse osmosis device 16 through a reverse osmosis delivery pump 10 to be used as fresh water which can enter a PVC centrifugal process again.
Example one
With reference to FIG. 1, in Gansu, a certain PVC raw materialThe centrifugal mother liquid of PVC produced by the production company is about 180m3The COD content is about 30mg/L, the PVC centrifugal mother liquor is subjected to sedimentation filtration and then is uniformly mixed with 15kg/h of ozone generated by two 10kg/h ozone generators 11 through an ejector 2, the mixture enters a first-stage bubbling cyclone oxidation tower 1, a metal oxide catalyst is paved on a first-stage catalytic bed 102 in the first-stage bubbling cyclone oxidation tower 1, the catalyst is formed by taking aluminum oxide and copper oxide as substrates and adding palladium, titanium and platinum, and the mass content of the aluminum oxide and the copper oxide is not less than 70%, the metal oxide catalyst can further enhance the sterilization effect of the ozone, improve the sterilization efficiency and effectively reduce the COD in the centrifugal mother liquor, and the COD in the PVC centrifugal mother liquor subjected to sterilization treatment in the first-stage bubbling cyclone oxidation tower 1 is reduced to below 15 mg/L; considering that part of organic matters and polymers are attached to the surface of the metal oxide catalyst in the sterilization process to influence the activity of the metal oxide catalyst, a primary tower side stirrer 101 positioned below a primary catalytic bed 102 is arranged on the tower wall of the primary bubbling cyclone oxidation tower 1, the primary tower side stirrer 101 can stir the metal oxide catalyst at a low speed, and the organic matters and the polymers attached to the surface of the metal oxide catalyst are removed by utilizing free friction and impact among the metal oxide catalysts.
After primary sterilization treatment, the PVC centrifugal mother liquor enters a secondary bubbling cyclone oxidation tower 3 for secondary sterilization treatment, the amount of ozone added into the secondary bubbling cyclone oxidation tower 3 is 5kg/h, and the secondary bubbling cyclone oxidation tower 3 comprises a secondary tower side stirrer 301, a secondary catalytic bed 302 and a microporous aeration device 303; one part of the sterilizing ozone of the second-stage bubbling cyclone oxidation tower 3 is redundant ozone in the first-stage bubbling cyclone oxidation tower 1 and is introduced into the second-stage bubbling cyclone oxidation tower 3 through the tower top, the other part of the ozone with the ozone amount of 5kg/h is sent into the second-stage bubbling cyclone oxidation tower 3 through the ozone reactor 11 and the microporous aeration device 303, after the sterilization is carried out by the second-stage bubbling cyclone oxidation tower 3, the COD in the centrifugal mother liquor is reduced to be below 10mg/L, and the monitoring data can be reduced to be below 5mg/L in the specific implementation process.
The centrifugal mother liquor after two-stage sterilization treatment flows into an ultrafiltration water inlet buffer tank 6 and is degassed by a degassing drumThe fan 7 introduces air 550m through the multi-point airflow distribution mechanism 6013Discharging redundant ozone, and discharging the redundant ozone into an ozone tail gas breaking device 12 through a tail gas breaking draught fan 13; an oxidation degassing reaction tower 5 is specially arranged at the top of the second-stage bubbling cyclone oxidation tower 3, an ultrafiltration degassing reaction tower 17 is specially arranged at the top of the ultrafiltration water inlet buffer tank 6, and the flow is set to be 50m3The oxidation tower circulating pump 4 extracts a certain amount of liquid from the second-stage bubbling cyclone oxidation tower 3 and continuously sprays the liquid into the oxidation degassing reaction tower 5 with the flow rate set to be 50m3The/h ultrafiltration water inlet circulating pump 18 extracts a certain amount of liquid from the ultrafiltration water inlet buffer tank 6 and continuously sprays the liquid into the ultrafiltration degassing reaction tower 17 to strengthen the effect of removing ozone in water, the liquid in the degassing reaction tower returns to the tower and the tank, and the gas phase enters the ozone tail gas removing device 12.
The centrifugal mother liquor with the ozone discharged completely enters an activated carbon filter 14 through an ultrafiltration liquid inlet pump 8, then enters an ultrafiltration system 15 (the COD content in the centrifugal mother liquor entering the ultrafiltration system 15 is required to be lower than 10 mg/L), then flows into an ultrafiltration water outlet buffer tank 9, and finally the treated liquid is sent to a reverse osmosis device 16 through a reverse osmosis delivery pump 10 to be used as fresh water which can enter the PVC centrifugation process again.
The sterilization process adopts ozone to sterilize the PVC centrifugal mother liquor, and utilizes the ejector 2 to mix gas and liquid and then send the mixture into the bubbling cyclone oxidation tower, the PVC centrifugal mother liquor and the ozone are mixed in the ejector 2 and fully react in the bubbling cyclone oxidation tower, and a metal oxide catalyst is also arranged in the bubbling cyclone oxidation tower, so that the sterilization effect of the ozone can be further enhanced and the sterilization efficiency can be improved; the two-stage sterilization treatment process can increase the contact time and times of the PVC centrifugal mother liquor and ozone, and plays a role in enhancing the sterilization effect.
According to the sterilization process, an ultrafiltration water inlet buffer tank 6 is arranged behind a secondary bubbling cyclone oxidation tower 3, and redundant unreacted ozone in the ultrafiltration water inlet buffer tank 6 is brought out of a tank body through air blown in by a degassing blower 7, so that mother liquor after sterilization treatment is prevented from carrying ozone; and the top of the second-stage bubbling cyclone oxidation tower 3 and the top of the ultrafiltration water inlet buffer tank 6 are specially provided with an oxidation degassing reaction tower, a circulating pump is respectively arranged to extract a certain amount of liquid from the tower and the tank to be sprayed into the corresponding degassing reaction tower continuously, the liquid of the degassing reaction tower returns to the tower tank, and the gas phase enters an ozone tail gas breaking device 12 to strengthen the effect of removing ozone in water.
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby, and any modification made on the basis of the technical scheme according to the technical idea proposed by the present invention falls within the protection scope of the present invention; the technology not related to the invention can be realized by the prior art.
Claims (10)
1. A sterilization process for treating PVC centrifugal mother liquor by ozone is characterized in that: the sterilization process comprises the following steps:
A. uniformly mixing the settled and filtered PVC centrifugal mother liquor with ozone generated by an ozone generator (11) through an ejector (2), and then sending the mixture into a bubbling cyclone oxidation tower for sterilization treatment;
B. after ozone sterilization treatment, the PVC centrifugal mother liquor containing ozone overflows into an ultrafiltration water inlet buffer tank (6) to be broken and the ozone is discharged;
C. the PVC centrifugal mother liquor with the ozone discharged is sequentially sent into an activated carbon filter (14), an ultrafiltration system (15) and an ultrafiltration effluent buffer tank (9), and finally sent into a reverse osmosis device (16) to be used as fresh water which can enter a PVC centrifugal process again.
2. The sterilization process for treating PVC centrifugal mother liquor by ozone according to claim 1, is characterized in that: the bubbling cyclone oxidation tower in the step A is at least divided into two stages, the multistage bubbling cyclone oxidation towers are connected in series, the primary bubbling cyclone oxidation tower is connected with an outlet pipeline of the ejector (2), and the later stage bubbling cyclone oxidation tower is connected with the primary bubbling cyclone oxidation tower through an overflow pipe and is connected with an ozone generator (11) through an ozone output pipeline with a valve.
3. The sterilization process for treating PVC centrifugal mother liquor by ozone according to claim 1, is characterized in that: the bubbling cyclone oxidation tower in the step A comprises a first-stage bubbling cyclone oxidation tower (1) and a second-stage bubbling cyclone oxidation tower (3) which are connected in series, the inlet end of an ejector (2) is connected with a PVC centrifugal mother liquor input pipe after sedimentation and filtration and is connected with an ozone generator (11) through an ozone output pipeline with a valve, and the outlet pipe of the ejector (2) extends into a cavity below a first-stage catalytic bed (102) of the first-stage bubbling cyclone oxidation tower (1); the upper part of the first-stage bubbling cyclone oxidation tower (1) is communicated with the second-stage bubbling cyclone oxidation tower (3) through an overflow pipe, and a microporous aeration device (303) positioned below a second-stage catalytic bed (302) in the second-stage bubbling cyclone oxidation tower (3) is connected with an ozone generator (11) through an ozone output pipeline with a valve.
4. The sterilization process for treating PVC centrifugal mother liquor by ozone according to claim 3, is characterized in that: the first-stage catalytic bed (102) and the second-stage catalytic bed (302) are both provided with metal oxide catalysts, the metal oxide catalysts take aluminum oxide and copper oxide as matrixes, and the mass content of the aluminum oxide and the copper oxide in the metal oxide catalysts is not less than 70%.
5. The sterilization process for treating PVC centrifugal mother liquor by ozone according to claim 3, is characterized in that: a first-stage tower side stirrer (101) is arranged on the tower plate of the first-stage bubbling cyclone oxidation tower (1) on the lower side of the first-stage catalyst bed (102), and a second-stage tower side stirrer (301) is arranged on the tower plate of the second-stage bubbling cyclone oxidation tower (3) on the lower side of the second-stage catalyst bed (302).
6. The sterilization process for treating PVC centrifugal mother liquor by ozone according to claim 3, is characterized in that: the gas-liquid ratio of the mixture of the ozone and the PVC centrifugal mother liquor input into the first-stage bubbling cyclone oxidation tower (1) by the ejector (2) is 0.5-1.3m3/m3(ii) a Ozone generatorThe ratio of gas to liquid in the mixture of the ozone supplied by the generator (11) to the second-stage bubbling cyclone oxidation tower (3) and the PVC centrifugal mother liquor containing the ozone input by the first-stage bubbling cyclone oxidation tower (1) to the second-stage bubbling cyclone oxidation tower (3) is 0.2-0.6m3/m3。
7. The sterilization process for treating PVC centrifugal mother liquor by ozone according to claim 3, is characterized in that: the top of second grade tympanic bulla whirl oxidation tower (3) is equipped with oxidation degassing reaction tower (5), this oxidation degassing reaction tower (5) is linked together through the bottom that has mother liquor circulating pipe and second grade tympanic bulla whirl oxidation tower (3) of oxidation tower circulating pump (4), oxidation tower circulating pump (4) carry the PVC centrifugation mother liquor that contains ozone to oxidation degassing reaction tower (5) in order to get rid of unnecessary ozone, oxidation degassing reaction tower (5) are connected with ozone tail gas removal device (12) through the pipeline that has tail gas removal draught fan (13), or connect in series through pipeline and ultrafiltration degassing reaction tower (17) that set up on ultrafiltration intake buffer tank (6) in step B in order to output unnecessary ozone mutually, the liquid phase of oxidation degassing reaction tower (5) returns second grade tympanic bulla whirl oxidation tower (3).
8. The sterilization process for treating PVC centrifugal mother liquor by ozone according to claim 1, is characterized in that: and a multi-point airflow distribution mechanism (601) connected with a degassing blower (7) through a pipeline is arranged at the bottom of the ultrafiltration water inlet buffer tank (6) in the step B, a degassing overflow tank (602) with the top higher than that of the multi-point airflow distribution mechanism (601) is arranged beside the multi-point airflow distribution mechanism (601), the degassing overflow tank (602) for isolating ozone gas from entering is connected with an ultrafiltration degassing reaction tower (17) arranged at the top of the ultrafiltration water inlet buffer tank (6) through a pipeline with an ultrafiltration circulating pump (18), a liquid phase of the ultrafiltration degassing reaction tower (17) returns to the ultrafiltration water inlet buffer tank (6), and a gas phase of the ultrafiltration degassing reaction tower (17) is connected with an ozone tail gas breaking device (12) through a pipeline with a tail gas breaking draught fan (13).
9. The sterilization process for treating PVC centrifugal mother liquor with ozone according to claim 1 or 8, is characterized in that: the activated carbon filter (14) in the step C is communicated with a degassing overflow groove (602) which is arranged at the bottom of the ultrafiltration water inlet buffer groove (6) in the step B and used for blocking the entry of ozone gas through a pipeline with an ultrafiltration liquid inlet pump (8).
10. The sterilization process for treating PVC centrifugal mother liquor by ozone according to claim 1, is characterized in that: and the ultrafiltration effluent buffer tank (9) in the step C is connected with a reverse osmosis device (16) through a pipeline with a reverse osmosis delivery pump (10), and the reverse osmosis delivery pump (10) sends the treated liquid to the reverse osmosis device (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110197525.9A CN112759145A (en) | 2021-02-22 | 2021-02-22 | Sterilization process for treating PVC centrifugal mother liquor by ozone |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110197525.9A CN112759145A (en) | 2021-02-22 | 2021-02-22 | Sterilization process for treating PVC centrifugal mother liquor by ozone |
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Inventor after: Song Xiaoliang Inventor after: Su Wenguo Inventor after: Jia Xiaojun Inventor after: Feng Yongjun Inventor after: Zhu Hao Inventor after: Li Hongkui Inventor before: Song Xiaoliang Inventor before: Su Wenguo |
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