CN209968090U - Sulfonated tail gas naphthalene recovery device - Google Patents
Sulfonated tail gas naphthalene recovery device Download PDFInfo
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- CN209968090U CN209968090U CN201920619216.4U CN201920619216U CN209968090U CN 209968090 U CN209968090 U CN 209968090U CN 201920619216 U CN201920619216 U CN 201920619216U CN 209968090 U CN209968090 U CN 209968090U
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- tail gas
- naphthalene
- storage tank
- sodium sulfite
- phase splitting
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Abstract
The utility model relates to the technical field of dinaphthol production, and discloses a sulfonated tail gas naphthalene recovery device; the problems of difficult recovery, high labor intensity and severe environment of the traditional sulfonated tail gas are solved; the tail gas recovery system comprises a tail gas condenser, a tail gas catcher, a phase splitting tower, an induced draft fan, a liquid naphthalene storage tank and a sodium sulfite storage tank, wherein a lower liquid outlet of the tail gas condenser is connected with the phase splitting tower, a lower liquid outlet of the phase splitting tower is connected with the sodium sulfite storage tank, an upper liquid outlet of the phase splitting tower is connected with the liquid naphthalene storage tank, the upper part of the tail gas condenser is connected with the tail gas catcher, and the upper part of the tail gas catcher is; the upper part of the tail gas condenser is provided with a spraying port which is connected with a sodium sulfite liquid inlet pipe; the utility model discloses separate out naphthalene alone from the sulfonated tail gas, use the phase splitting tower can serialization phase splitting, simplified system's equipment, improved smart naphthalene recovery quality simultaneously, whole device leakproofness is good, and degree of automation is high, has reduced artifical working strength.
Description
Technical Field
The utility model relates to a dinaphthol production technical field especially relates to a sulfonated tail gas naphthalene recovery unit.
Background
The traditional dinaphthol production device mainly comprises units such as sulfonation, hydrolysis, naphthalene blowing, neutralization, cooling, filtration, alkali fusion, dilution, acidification, boiling, drying and distillation, wherein in the sulfonation process, the reaction of refined naphthalene and sulfuric acid is a reversible reaction, tail gas contains unreacted naphthalene, water vapor and a very small amount of sulfuric acid, the crystallization point of naphthalene is 80 ℃, the temperature is too low, the naphthalene is easy to solidify and block a pipeline, and the dilute sulfuric acid has very strong corrosivity and brings great challenges to naphthalene recovery work.
The traditional process adopts a sodium naphthalenesulfonate filtrate wastewater cooling and spraying mode for recycling, long-strip lost naphthalene in the sodium naphthalenesulfonate filtrate in the spraying mode is in a large naphthalene pool, naphthalene needs to be fished in a short period of time, the environment is severe, and the potential safety hazard is large.
SUMMERY OF THE UTILITY MODEL
The utility model overcomes prior art exists not enough, provides an degree of automation height, and the continuous sulfonated tail gas naphthalene recovery unit of process has solved the tradition and has been difficult for retrieving sulfonated tail gas, and intensity of labour is big, the abominable problem of environment.
The utility model discloses a realize through following technical scheme.
A sulfonated tail gas naphthalene recovery device comprises a tail gas condenser, a tail gas catcher, a phase splitting tower, an induced draft fan, a liquid naphthalene storage tank and a sodium sulfite storage tank, wherein a lower liquid outlet of the tail gas condenser is connected with the phase splitting tower, a lower liquid outlet of the phase splitting tower is connected with the sodium sulfite storage tank, an upper liquid outlet of the phase splitting tower is connected with the liquid naphthalene storage tank, the upper part of the tail gas condenser is connected with the tail gas catcher, and the upper part of the tail gas catcher is connected with the induced draft fan; the upper part of the tail gas condenser is provided with a spraying port, and the spraying port is connected with a sodium sulfite liquid inlet pipe.
Furthermore, the sodium sulfite liquid inlet pipe is connected with the sodium sulfite storage tank through a first pipeline, and a flow pump is arranged on the first pipeline.
Furthermore, the device also comprises a buffer tank, wherein the buffer tank is connected with the air inlet of the tail gas condenser.
Sulfonated tail gas from a sulfonation reactor firstly enters a buffer tank, then enters a tube nest from the lower part of a tail gas condenser, hot water with the temperature of 50-60 ℃ is introduced between the tubes for cooling, the upper part of the tube nest is sprayed with a sodium sulfite solution, and dilute sulfuric acid in the tail gas is neutralized, so that equipment is prevented from being corroded; and tail gas enters a tail gas catcher and is discharged through a draught fan, and the spraying liquid automatically flows to the phase splitting tower to carry out phase splitting.
The naphthalene-containing spray liquid enters a phase separation tower and is divided into two phases through density difference, the upper layer is liquid naphthalene, the lower layer is a sodium sulfite solution, the liquid naphthalene flows out from the upper part and enters a liquid naphthalene tank, the lower part sodium sulfite solution enters the sodium sulfite tank, and then enters a diluent tank as an alkali fusion diluent, or circularly enters the upper part of a tail gas condenser as the spray liquid to be sprayed.
The utility model discloses produced beneficial effect does for prior art.
The utility model discloses a tail gas condenser, tail gas catcher and the effectual sulphuric acid that has corrosivity in with tail gas of phase separation tower that set up neutralize to separate out naphthalene from the sulfonation tail gas alone. The phase separation tower can be used for continuously separating phases, thereby simplifying system equipment and simultaneously improving the recovery quality of refined naphthalene. The whole device has good sealing performance and high automation degree, and reduces the manual working strength.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein, 1 is the tail gas condenser, 2 is the tail gas catcher, 3 is the phase separation tower, 4 is the draught fan, 5 is the liquid naphthalene storage tank, 6 is the sodium sulfite storage tank, 7 is the sodium sulfite feed liquor pipe, 8 is first pipeline, 9 is the flow pump.
Detailed Description
In order to make the technical problem, technical scheme and beneficial effect that the utility model will solve more clearly understand, combine embodiment and attached drawing, it is right to go on further detailed description the utility model discloses. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solution of the present invention is described in detail below with reference to the embodiments and the drawings, but the scope of protection is not limited thereto.
As shown in fig. 1, the sulfonated tail gas naphthalene recovery device comprises a tail gas condenser 1, a tail gas catcher 2, a phase separation tower 3, an induced draft fan 4, a liquid naphthalene storage tank 5 and a sodium sulfite storage tank 6, wherein a lower liquid outlet of the tail gas condenser 1 is connected with the phase separation tower 3, a lower liquid outlet of the phase separation tower 3 is connected with the sodium sulfite storage tank 6, an upper liquid outlet of the phase separation tower 3 is connected with the liquid naphthalene storage tank 5, the upper part of the tail gas condenser 1 is connected with the tail gas catcher 2, and the upper part of the tail gas catcher 2 is connected with the induced draft fan; the upper part of the tail gas condenser 1 is provided with a spraying port which is connected with a sodium sulfite liquid inlet pipe 7. Sodium sulfite feed liquor pipe 7 is connected through first pipeline 8 with sodium sulfite storage tank 6, is provided with flow pump 9 on the first pipeline 8.
The specific working process of the device is as follows: sulfonated tail gas from a sulfonation reactor enters a tail gas condenser 1 from the lower part of the tail gas condenser 1, hot water with the temperature of 50-60 ℃ is introduced into a condensing tank to cool the sulfonated tail gas, the upper part of the condensing tank is sprayed with sodium sulfite solution, and dilute sulfuric acid in the tail gas is neutralized, so that equipment is prevented from being corroded; the tail gas which is sprayed enters a tail gas catcher 2 and is discharged through a draught fan 4, and the spraying liquid automatically flows to a phase splitting tower 3 for phase splitting. The spray liquid containing naphthalene enters a phase separation tower 3, the naphthalene is divided into two phases through density difference, the upper layer is liquid naphthalene, the lower layer is sodium sulfite solution, the liquid naphthalene flows out from the upper part and enters a liquid naphthalene storage tank 5, the lower part sodium sulfite solution enters a sodium sulfite storage tank 6, and the sodium sulfite solution in the sodium sulfite storage tank 6 is circulated as the spray liquid through a first pipeline 8 and enters the upper part of a tail gas condenser 1 to be sprayed.
Sodium sulfite solution is used as spray water, so that dilute sulfuric acid in tail gas can be neutralized, and equipment is prevented from being corroded; hot water with the temperature of 50-60 ℃ is used as cooling water, so that the solidification of naphthalene can be effectively avoided, and the pipeline blockage is avoided; the utility model discloses a tail gas condenser 1, tail gas catcher 2 and the effectual sulphuric acid that has corrosivity in with tail gas of phase separation tower 3 that set up neutralize to separate out naphthalene alone from the sulfonated tail gas. The phase separation tower 3 can be used for continuous phase separation, thereby simplifying system equipment and simultaneously improving the recovery quality of refined naphthalene. The whole device has good sealing performance and high automation degree, and reduces the manual working strength.
The above description is for further details of the present invention with reference to specific preferred embodiments, and it should not be understood that the embodiments of the present invention are limited thereto, and it will be apparent to those skilled in the art that the present invention can be implemented in a plurality of simple deductions or substitutions without departing from the scope of the present invention, and all such alterations and substitutions should be considered as belonging to the present invention, which is defined by the appended claims.
Claims (3)
1. The sulfonated tail gas naphthalene recovery device is characterized by comprising a tail gas condenser (1), a tail gas catcher (2), a phase separation tower (3), an induced draft fan (4), a liquid naphthalene storage tank (5) and a sodium sulfite storage tank (6), wherein a lower liquid outlet of the tail gas condenser (1) is connected with the phase separation tower (3), a lower liquid outlet of the phase separation tower (3) is connected with the sodium sulfite storage tank (6), an upper liquid outlet of the phase separation tower (3) is connected with the liquid naphthalene storage tank (5), the upper part of the tail gas condenser (1) is connected with the tail gas catcher (2), and the upper part of the tail gas catcher (2) is connected with the induced draft fan (4); the upper part of the tail gas condenser (1) is provided with a spraying port, and the spraying port is connected with a sodium sulfite liquid inlet pipe (7).
2. The sulfonated tail gas naphthalene recovery device according to claim 1, wherein the sodium sulfite inlet pipe (7) is connected with the sodium sulfite storage tank (6) through a first pipeline (8), and a flow pump (9) is arranged on the first pipeline (8).
3. The sulfonated tail gas naphthalene recovery device according to claim 1, further comprising a buffer tank, wherein the buffer tank is connected with the air inlet of the tail gas condenser (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920619216.4U CN209968090U (en) | 2019-04-30 | 2019-04-30 | Sulfonated tail gas naphthalene recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920619216.4U CN209968090U (en) | 2019-04-30 | 2019-04-30 | Sulfonated tail gas naphthalene recovery device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209968090U true CN209968090U (en) | 2020-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920619216.4U Active CN209968090U (en) | 2019-04-30 | 2019-04-30 | Sulfonated tail gas naphthalene recovery device |
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| CN (1) | CN209968090U (en) |
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2019
- 2019-04-30 CN CN201920619216.4U patent/CN209968090U/en active Active
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