CN111573767B - A carousel extraction tower for containing phenol sewage treatment - Google Patents
A carousel extraction tower for containing phenol sewage treatment Download PDFInfo
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- CN111573767B CN111573767B CN202010477569.2A CN202010477569A CN111573767B CN 111573767 B CN111573767 B CN 111573767B CN 202010477569 A CN202010477569 A CN 202010477569A CN 111573767 B CN111573767 B CN 111573767B
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- phenol
- tower
- heavy phase
- line monitor
- rotating
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/26—Treatment of water, waste water, or sewage by extraction
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/34—Organic compounds containing oxygen
- C02F2101/345—Phenols
Abstract
The invention discloses a rotary disc extraction tower, wherein a tower body heavy phase feeding hole is connected with a first phenol on-line monitor; the tower body heavy phase discharge port is connected with a second phenol on-line monitor; the motor in the rotary disc extraction tower is a variable speed motor, and the variable speed motor, the first phenol on-line monitor and the second phenol on-line monitor are electrically connected with the frequency converter. Aiming at the problem of large fluctuation of the quality of the fed water in the industrial sewage treatment process in the field of environmental protection, the turntable extraction tower provided by the invention adopts the frequency converter to control the variable speed motor to change the speed, so that the optimum rotating speed which is suitable for the concentration of phenol in heavy-phase fed materials is selected to operate, the maximum extraction efficiency is obtained under the condition of lowest energy consumption, and the operation cost is further reduced.
Description
Technical Field
The invention relates to the technical field of environmental-friendly chemical equipment, in particular to a rotary disc extraction tower for treating phenol-containing sewage.
Background
The sewage after steam stripping treatment in the sewage treatment plant of the coal liquefaction project mainly comprises purified water containing ammonia and phenol discharged by devices such as coal liquefaction, hydrofining, hydrocracking, sulfur recovery and the like, wherein the phenol content is very high, and the purified water exceeds the scope of general biochemical treatment and needs to be subjected to phenol removal before the biochemical treatment process.
Since the 50 s of the last century, the rotary disc extraction tower is an important chemical device and has wide application in the fields of chemical industry, petroleum, environmental protection, pharmacy and the like. The structure of the existing rotating disc extraction tower comprises a tower body and a fixed ring arranged on the inner wall of the tower body, wherein the inner cavity of the tower body is divided into a plurality of small chambers, a plurality of rotating shafts connected with a rotating motor are inserted into the center of the tower body from the top of the tower, rotating discs are arranged on the rotating shafts, and the rotating discs in each tower chamber are arranged in a staggered mode at different heights. The working process is that heavy-phase materials and light-phase materials are respectively added to the upper end and the lower end of the tower body, the materials are mixed and extracted and separated through shearing force brought by the rotation of the rotating disc driven by the rotating shaft, the light-phase materials after extraction and separation are led out from the clarification area, and the heavy-phase materials after extraction and separation are led out from the precipitation area, so that the effect of extraction and separation is achieved.
However, the above-mentioned rotating disc extraction tower still has some problems for the sewage treatment process, for example, the inflow water in the device belongs to industrial sewage, wherein the fluctuation of phenol content is large, in order to meet the effluent standard, and the device considers a certain design margin at the same time, so that the rotating disc extraction tower needs to be maintained at a high rotation speed for a long time, which causes the operation cost in the actual engineering to be too large.
Disclosure of Invention
The invention aims to provide a rotary disc extraction tower which can be applied to the treatment process of industrial phenol-containing sewage so as to solve the defects of the prior art in the background technology. The rotating speed of the rotating disc extraction tower is controlled according to the concentration change of the phenol in the inlet water, so that the aim of reducing the operation cost in the industrial phenol-containing sewage treatment process is fulfilled.
In order to achieve the above purpose, the invention provides the following technical scheme:
a rotary disc extraction tower comprises a tower body, a fixed ring, a rotating shaft, a motor and a rotary disc; a light phase clarification area is arranged above the tower body, a heavy phase feed inlet is arranged at the lower part of the light phase clarification area, a heavy phase clarification area is arranged below the tower body, and a heavy phase discharge outlet is arranged at the lower part of the heavy phase clarification area; the heavy phase feed inlet is connected with a first phenol on-line monitor; the heavy phase discharge port is connected with a second phenol on-line monitor; the motor is a variable speed motor, and the variable speed motor, the first phenol on-line monitor and the second phenol on-line monitor are electrically connected with the frequency converter.
Further, the heavy phase feed inlet is connected with a first sampling branch pipe, and the first sampling branch pipe is connected with the first phenol on-line monitor.
Further, the heavy phase discharge hole is connected with a second sampling branch pipe, and the second sampling branch pipe is connected with the second phenol on-line monitor.
Furthermore, the rotating shafts are multiple and extend into the tower body, a plurality of rotating discs are axially arranged on each rotating shaft, and each rotating shaft is in transmission connection with a motor shaft of a variable speed motor.
Further, the axial direction of each rotating shaft is perpendicular to the bottom surface of the tower body.
Furthermore, a plurality of fixing rings are arranged in the tower body from top to bottom, a tower chamber is formed between two adjacent fixing rings, and a plurality of turntables are arranged in each tower chamber.
Furthermore, a plurality of turntables in each tower chamber are arranged in a staggered mode at different heights.
Further, a light phase discharge hole is formed in the upper portion of the light phase clarification area.
Further, a light phase feeding hole is formed in the upper portion of the heavy phase clarification area.
Aiming at the problem of large fluctuation of the quality of the fed water in the industrial sewage treatment process in the field of environmental protection, the turntable extraction tower provided by the invention adopts the frequency converter to control the variable speed motor to change the speed, so that the optimum rotating speed which is suitable for the concentration of phenol in heavy-phase fed materials is selected to operate, the maximum extraction efficiency is obtained under the condition of lowest energy consumption, and the operation cost is further reduced.
Drawings
In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.
FIG. 1 is a schematic structural diagram of a rotating disk extraction column according to an embodiment of the present invention;
fig. 2 is a sectional view of a rotating disk extraction column according to an embodiment of the present invention.
Description of reference numerals:
1. a tower body; 2. a fixing ring; 3. a rotating shaft; 4. a motor; 5. a turntable; 61. a first phenol on-line monitor; 62. (ii) a 7. A light phase clarification zone; 8. a heavy phase clarification zone; 9. a heavy phase feed inlet; 10. a light phase discharge port; 11. a light phase feed inlet; 12. a heavy phase discharge port; 13. a frequency converter; 91. a first sampling branch pipe; 121. a second sampling branch.
Detailed Description
In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.
Referring to fig. 1-2, a rotating disc extraction tower comprises a tower body 1, a fixed ring 2, a rotating shaft 3, a motor 4 and a rotating disc 5. The upper part of the tower body 1 is a light phase clarification area 7, the lower part of the light phase clarification area 7 is provided with a heavy phase feed inlet 9, the lower part of the tower body 1 is a heavy phase clarification area 8, and the lower part of the heavy phase clarification area 8 is provided with a heavy phase discharge outlet 12.
The heavy phase feed port 9 is connected with a first phenol on-line monitor 61.
The heavy phase discharge port 12 is connected with a second phenol on-line monitor 62.
The motor 4 is a variable speed motor, and the variable speed motor, the first phenol on-line monitor 61 and the second phenol on-line monitor 62 are electrically connected with the frequency converter 13.
The first phenol on-line monitor 61 and the second phenol on-line monitor 62 may be commercially available mature products.
The improved heavy phase feeding hole is connected with a first sampling branch pipe 91, and the first sampling branch pipe 91 is connected with the first phenol on-line monitor 61. The heavy phase discharge port is connected with a second sampling branch pipe 121, and the second sampling branch pipe 121 is connected with the second phenol on-line monitor 62. The phenol on-line monitor is convenient for sampling and monitoring after the sampling branch pipe is arranged.
The improved structure is characterized in that the rotating shafts 3 are multiple, the rotating shafts 3 extend into the tower body 1, a plurality of rotating discs 5 are axially arranged on each rotating shaft 3, each rotating shaft 3 is in transmission connection with a motor shaft of a variable speed motor (motor 4), and each variable speed motor (motor 4) is arranged outside the tower body 1. A plurality of rotating discs 5 are axially arranged on each rotating shaft 3, so that the problem of up-and-down oscillation when a large rotating disc rotates in the prior art can be solved, the energy utilization efficiency is higher,
in a further improvement, the axial direction of each rotating shaft 3 is perpendicular to the bottom surface of the tower body 1, so that the rotating shafts 3 can be conveniently installed in the tower body 1.
Still further improved, be provided with a plurality of solid fixed rings 2 from top to bottom in the tower body 1, the outward flange of each solid fixed ring 2 is connected with the inner wall of tower body 1. A tower chamber is formed between two adjacent fixing rings 2, and a plurality of turntables 3 are arranged in each tower chamber, so that light-heavy phase substances are mixed more uniformly in each tower chamber. In addition, a plurality of turntables 3 in each tower chamber are arranged in a staggered mode at different heights, axial back mixing is reduced, and the mass transfer efficiency is improved to a great extent.
Preferably, a light phase discharge port 10 is arranged at the upper part of the light phase clarification zone 7. And a light phase feed inlet 11 is formed in the upper part of the heavy phase clarification zone 8.
Specifically, the rotating disc extraction tower comprises a tower body 1, a fixing ring 2, a rotating shaft 3, a motor 4 and a rotating disc 5. The upper part of the tower body 1 is a light phase clarification area 7, the upper part of the light phase clarification area 7 is provided with a light phase discharge hole 10, the lower part of the light phase clarification area 7 is provided with a heavy phase feed inlet 9, and the heavy phase feed inlet 9 is connected with a first phenol online monitor 61. The lower part of the tower body 1 is a heavy phase clarification area 8, the upper part of the heavy phase clarification area 8 is provided with a light phase feed inlet 11, the lower part of the heavy phase clarification area 8 is provided with a heavy phase discharge outlet 12, and the heavy phase discharge outlet 12 is connected with a second phenol online monitor 62.
The motor 4 is a variable speed motor, and the variable speed motor, the first phenol on-line monitor 61 and the second phenol on-line monitor 62 are electrically connected with the frequency converter 13. The first phenol on-line monitor 61 is used to monitor the phenol content at the heavy phase feed inlet 9. The second phenol on-line monitor 62 is used for monitoring the phenol content at the heavy phase discharge port 12. Thereby come control converter according to the phenol content of survey to control variable speed motor with the variable speed, make it keep optimum rotational speed under the feeding of this concentration, when the phenol content in the feeding changes, in time adjust 5 rotational speeds of carousel in order to satisfy extraction efficiency under the minimum energy consumption condition, reach the water requirement, be convenient for carry out follow-up biochemical treatment, realize satisfying the purpose that reduces the running cost under the prerequisite of dephenolization requirement in the sewage treatment system.
The heavy phase feed inlet is connected with a first sampling branch pipe 91, and the first sampling branch pipe 91 is connected with the first phenol on-line monitor 61. The heavy phase discharge port is connected with a second sampling branch pipe 121, and the second sampling branch pipe 121 is connected with the second phenol on-line monitor 62. The phenol on-line monitor is convenient for sampling and monitoring after the sampling branch pipe is arranged.
In order to solve the problem of vertical oscillation when a large turntable rotates in the prior art, a plurality of rotating shafts 3 are arranged, the rotating shafts 3 extend into the tower body 1, a plurality of rotating discs 5 are axially arranged on each rotating shaft 3, each rotating shaft 3 is in transmission connection with a motor shaft of a variable speed motor (motor 4), and each variable speed motor (motor 4) is arranged outside the tower body 1. Each rotating shaft 3 is provided with a plurality of rotating discs 5 along the axial direction. In addition, the axial direction of each rotating shaft 3 is perpendicular to the bottom surface of the tower body 1, so that the rotating shafts 3 can be conveniently installed in the tower body 1.
As shown in fig. 1, a plurality of fixing rings 2 are arranged in the tower body 1 from top to bottom, and the outer edge of each fixing ring 2 is connected with the inner wall of the tower body 1. A tower chamber is formed between two adjacent fixing rings 2, and a plurality of turntables 3 are arranged in each tower chamber, so that light-heavy phase substances are mixed more uniformly in each tower chamber. In addition, a plurality of turntables 3 in each tower chamber are arranged in a staggered mode at different heights, axial back mixing is reduced, and the mass transfer efficiency is improved to a great extent.
The first and second phenol on-line monitors 61 and 62 can be 3S-CLC6H5OH type phenol on-line analyzer, which is an on-line continuous analyzer and uses LED light source to perform colorimetric analysis to measure phenol concentration.
A typical analysis program of the model 3S-CLC6H5OH phenol on-line analyzer is set up inside the system, such as: the optical reaction cell is flushed with the sample while a portion of the sample is extracted, one or more agents (e.g., buffers or masking agents) are added, and then a first measurement is taken as a reference measurement. The reference measurements can eliminate interference factors such as sample color and turbidity, as well as a wide variety of colors resulting from the agent and refracted light.
After obtaining the reference value, the color of the medicament is increased to produce a change. The sample was mixed and allowed to stand for a certain time to allow the colour to fully stabilise and a second measurement was made to obtain a second reading. The reference measurement and the second measurement are used to calculate the concentration value under a certain process coefficient. The reaction cell is then emptied and washed several times before the next cycle of measurement is taken.
Present research shows that in a liquid-liquid system, the density difference between two phases is small, and the interfacial tension is not large, so from the fluid mechanics condition of the process, in the liquid-liquid contact process, the inertial force which can be used for strengthening the process is not large, and meanwhile, the layering separation capability of the dispersed two phases is not high. Therefore, in order to improve the efficiency of the liquid-liquid mass transfer apparatus, it is often necessary to supplement energy by means of stirring, pulsation, vibration, and the like. For the two phases to separate, a layering stage is required to ensure sufficient residence time for the dispersed phases to coalesce.
The external energy is introduced in the liquid-liquid mass transfer separation process, so that the liquid dispersion can be promoted, the two-phase flow contact condition is improved, the mass transfer in the process is facilitated, the mass transfer efficiency is improved, and the height of extraction equipment is reduced. However, it should be noted that if the external energy is too large, the axial back-mixing of the two-phase liquid in the equipment is intensified, and the driving force of the mass transfer in the process is reduced, so that the mass transfer efficiency is reduced. Also, if the droplets are too dispersed and too small in size, the intra-droplet circulation will disappear and the mass transfer efficiency will also be affected. Therefore, both the advantages and disadvantages should be considered in determining the applied energy. For a particular extraction process, the appropriate input energy, i.e., the number of revolutions of the turret motor 4 that must be adjusted in operation based on the phenol content of the feed water being treated, should generally be determined experimentally.
For example: in a phenol recovery section of a phenol-containing sewage treatment plant with a design scale of 93t/h, when the phenol content of inlet water is 486.8Kg/h, according to a design empirical formula and the research on the actual operation treatment effect of the plant, the total height of a turntable extraction tower is 22.094m, the total number of 48 layers is 48, the inner diameter is 2.4m, and the phenol content in sewage is reduced to 2.87Kg/h after passing through the turntable extraction tower under the condition that the operation rotating speed of a motor of the turntable tower is 27 r/min.
Due to the size of the liquid drops, the mass transfer coefficient and the flux of the extraction tower are influenced, and the mass transfer area is not only related to the interphase mass transfer area. These two factors must be considered sufficiently in dispersing the dispersed phase liquid into droplets. In addition, when the stirring speed is high, the corresponding mass transfer area is large, the extraction efficiency is high, but the layering is slow, the phenomena of failure under a heavy phase and failure on a light phase occur, the energy consumption is large, and the extraction efficiency is low.
The carousel extraction tower in this embodiment, thereby it controls variable speed motor (motor 4) with the variable speed according to the phenol content of survey control converter, make it keep optimum rotational speed under the feeding of this concentration, when the phenol content in the feeding changes, in time adjust 5 rotational speeds of carousel in order to satisfy extraction efficiency under the minimum energy consumption condition, reach the water requirement, be convenient for carry out follow-up biochemical treatment, reach the purpose of reducing running cost under the prerequisite that the realization satisfied dephenolization requirement in the sewage treatment system. Thus, the optimum turntable speed for different phenol contents in the feed water was determined experimentally. In actual work, the rotating speed range of the extraction tower is selected to be 0-50 r/min according to experimental results. The phenol content is measured by the first and second phenol on-line monitors 61 and 62, the treatment capacity is 100 percent as a boundary, the revolution of the motor 4 is adjusted downwards by the frequency converter 13 which is larger than the boundary, and the revolution of the motor 4 is adjusted upwards by the frequency converter 13 which is smaller than the boundary, so that the rotating disc 5 is always controlled at the most suitable rotating speed, and the actual effluent water quality requirement of a sewage treatment plant is met.
The carousel extraction tower that this embodiment provided, it carries out the survey of industry sewage phenol content through adopting phenol on-line monitoring appearance, thereby control the converter according to the measured value with the variable speed motor, make it keep optimum rotational speed under the feeding of this concentration, when the phenol content in the feeding changes, in time adjust the carousel rotational speed in order to satisfy extraction efficiency under minimum energy consumption condition, reach the water requirement, be convenient for carry out follow-up biochemical treatment, realize satisfying the mesh that reaches reduction running cost under the prerequisite that takes off the phenol requirement in the sewage treatment system.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.
Claims (7)
1. A rotary disc extraction tower for treating phenol-containing sewage comprises a tower body, a fixed ring, a rotating shaft, a motor and a rotary disc; a light phase clarification area is arranged above the tower body, a heavy phase feed inlet is arranged at the lower part of the light phase clarification area, a heavy phase clarification area is arranged below the tower body, and a heavy phase discharge outlet is arranged at the lower part of the heavy phase clarification area; the system is characterized in that the heavy phase feed inlet is connected with a first phenol on-line monitor; the heavy phase discharge port is connected with a second phenol on-line monitor; the motor is a variable speed motor, and the variable speed motor, the first phenol on-line monitor and the second phenol on-line monitor are electrically connected with the frequency converter; controlling a frequency converter according to the measured phenol content so as to control a variable speed motor to change speed; the heavy phase feed inlet is connected with a first sampling branch pipe, and the first sampling branch pipe is connected with the first phenol on-line monitor; and the heavy phase discharge port is connected with a second sampling branch pipe, and the second sampling branch pipe is connected with the second phenol on-line monitor.
2. The rotating disc extraction tower for phenolic wastewater treatment as claimed in claim 1, wherein the rotating shaft is plural, the rotating shafts extend into the tower body, each rotating shaft is provided with plural rotating discs along the axial direction, and each rotating shaft is in transmission connection with a motor shaft of a variable speed motor.
3. The rotating disc extraction tower for phenolic wastewater treatment as claimed in claim 2, wherein the axial direction of each rotating shaft is perpendicular to the bottom surface of the tower body.
4. The rotating disc extraction tower for phenolic wastewater treatment as claimed in claim 3, wherein a plurality of fixing rings are arranged in the tower body from top to bottom, a tower chamber is formed between two adjacent fixing rings, and a plurality of rotating discs are arranged in each tower chamber.
5. The rotating disc extraction tower for phenolic wastewater treatment as claimed in claim 4, wherein the plurality of rotating discs in each chamber are staggered at different heights.
6. The rotating disc extraction tower for phenolic wastewater treatment as claimed in claim 1, wherein the upper part of the light phase clarification zone is provided with a light phase discharge hole.
7. The rotating disc extraction tower for phenolic wastewater treatment as claimed in claim 1, wherein the upper part of the heavy phase clarification zone is provided with a light phase feed inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010477569.2A CN111573767B (en) | 2020-05-29 | 2020-05-29 | A carousel extraction tower for containing phenol sewage treatment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010477569.2A CN111573767B (en) | 2020-05-29 | 2020-05-29 | A carousel extraction tower for containing phenol sewage treatment |
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| Publication Number | Publication Date |
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| CN111573767A CN111573767A (en) | 2020-08-25 |
| CN111573767B true CN111573767B (en) | 2021-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010477569.2A Active CN111573767B (en) | 2020-05-29 | 2020-05-29 | A carousel extraction tower for containing phenol sewage treatment |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU755289A1 (en) * | 1978-05-10 | 1980-08-15 | Rubezhanskij Vorosh Mashinostr | Rotor-disc extractor |
| CN101104620A (en) * | 2006-07-14 | 2008-01-16 | 中国科学院过程工程研究所 | Device and method for continuously back extracting penicillin |
| CN201572541U (en) * | 2009-12-31 | 2010-09-08 | 温州市东亚制药装备制造有限公司 | Rotating disc type extraction tower |
| CN202751836U (en) * | 2012-08-21 | 2013-02-27 | 江苏天目建设集团溧阳市常兴环保工程有限公司 | Turnplate extraction tower |
| CN106799064A (en) * | 2017-02-27 | 2017-06-06 | 中国科学院过程工程研究所 | A kind of combination dials extraction tower |
| CN207614404U (en) * | 2017-11-22 | 2018-07-17 | 河南莱帕克化工设备制造有限公司 | Rotating disc type extraction tower experimental provision |
| CN109078359A (en) * | 2018-08-30 | 2018-12-25 | 山东亚邦化工科技有限公司 | A kind of technique and device for acesulfame potassium sulfonation hydrolysis liquid continuous extration |
-
2020
- 2020-05-29 CN CN202010477569.2A patent/CN111573767B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU755289A1 (en) * | 1978-05-10 | 1980-08-15 | Rubezhanskij Vorosh Mashinostr | Rotor-disc extractor |
| CN101104620A (en) * | 2006-07-14 | 2008-01-16 | 中国科学院过程工程研究所 | Device and method for continuously back extracting penicillin |
| CN201572541U (en) * | 2009-12-31 | 2010-09-08 | 温州市东亚制药装备制造有限公司 | Rotating disc type extraction tower |
| CN202751836U (en) * | 2012-08-21 | 2013-02-27 | 江苏天目建设集团溧阳市常兴环保工程有限公司 | Turnplate extraction tower |
| CN106799064A (en) * | 2017-02-27 | 2017-06-06 | 中国科学院过程工程研究所 | A kind of combination dials extraction tower |
| CN207614404U (en) * | 2017-11-22 | 2018-07-17 | 河南莱帕克化工设备制造有限公司 | Rotating disc type extraction tower experimental provision |
| CN109078359A (en) * | 2018-08-30 | 2018-12-25 | 山东亚邦化工科技有限公司 | A kind of technique and device for acesulfame potassium sulfonation hydrolysis liquid continuous extration |
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