CN219526307U - Pre-extraction phenol recovery system - Google Patents
Pre-extraction phenol recovery system Download PDFInfo
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- CN219526307U CN219526307U CN202320405854.2U CN202320405854U CN219526307U CN 219526307 U CN219526307 U CN 219526307U CN 202320405854 U CN202320405854 U CN 202320405854U CN 219526307 U CN219526307 U CN 219526307U
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Abstract
The utility model discloses a pre-extraction phenol recovery system, which comprises an extraction tower, wherein a liquid inlet of the extraction tower is connected with a liquid inlet pipe, a solvent inlet of the extraction tower is connected with a liquid outlet of a solvent storage tank through a pipeline, a solvent outlet of the extraction tower is connected with a liquid inlet of an extract tank through a pipeline, the liquid outlet of the extract tank is connected with a solvent liquid outlet pipe, the liquid outlet of the extract tank is also connected with one end of a return pipe, and the other end of the return pipe is connected with the liquid inlet pipe; the regeneration valve is installed on the solvent drain pipe, and the reflux regulating valve is installed on the reflux pipe. The phenolic ether and a small amount of mixed phenolic wastewater in the extract tank are discharged back to the liquid inlet pipe of the extraction tower, so that the phenolic ether is mixed with the phenolic wastewater in the liquid inlet pipe in advance for pre-extraction, the contact time of the solvent ether and the phenolic wastewater is longer, the dephenolization amount in the whole dephenolization process is improved, the phenol emission is reduced, the economic benefit of a production system is improved, and the use amount of the solvent phenol is reduced.
Description
Technical field:
the utility model relates to the field of coal chemical industry, in particular to a pre-extraction phenol recovery system.
The background technology is as follows:
the BGL slag gasification technology (BGL gasification technology for short) is a high-efficiency advanced coal gasification technology, and can gasify petroleum coke, anthracite, bituminous coal, subbituminous coal, lignite and mixed feeding of the coals. During production, the BGL gasification furnace generates coal gas water, phenolic wastewater treated by the deacidification tower of the coal gas water device is sent to the extraction tower for extraction by using ether, and dephenolized water is sent to the sewage treatment system for treatment.
Before the whole dephenolization process, the phenol content is up to 5000mg/L, and in order to improve the recovery rate of phenol, the extractant ether is required to be continuously injected into the extraction tower, so that the ether consumption in the whole process is extremely high, and when the extractant is discharged from the extraction tower, part of phenol-containing water is discharged at the same time, so that the water is mixed into the extractant ether, the extraction effect is poor, and the total phenol in the dephenolized water exceeds the standard; in addition, after water is mixed into the extractant ether, the demand of the whole system for the ether is increased, and the phenol-containing ether can be regenerated after dephenolization, and part of the ether is consumed in the regeneration process, but the consumption of the ether is more due to the large consumption of the ether.
The utility model comprises the following steps:
the utility model aims to provide a pre-extracted phenol recovery system.
The utility model is implemented by the following technical scheme:
the pre-extraction phenol recovery system comprises an extraction tower, wherein a liquid inlet of the extraction tower is connected with a liquid inlet pipe, a water outlet of the extraction tower is connected with a water inlet of a sewage treatment system through a pipeline, a solvent inlet of the extraction tower is connected with a liquid outlet of a solvent storage tank through a pipeline, a liquid inlet of the solvent storage tank is connected with a solvent outlet of a regeneration tower through a pipeline, a solvent outlet of the extraction tower is connected with a liquid inlet of an extract tank through a pipeline, a liquid outlet of the extract tank is connected with a solvent liquid outlet pipe, a liquid outlet of the extract tank is also connected with one end of a return pipe, and the other end of the return pipe is connected with the liquid inlet pipe; and a regeneration valve is arranged on the solvent drain pipe, and a reflux regulating valve is arranged on the reflux pipe.
Preferably, a liquid inlet regulating valve is installed on the liquid inlet pipe at the front end of the return pipe, and the communication end of the return regulating valve is electrically connected with the communication end of the liquid inlet regulating valve.
Preferably, a static mixer is mounted on the feed line between the return line and the extraction column.
The utility model has the advantages that: the phenolic ether and a small amount of mixed phenolic wastewater in the extract tank are discharged back to the liquid inlet pipe of the extraction tower, so that the phenolic ether is mixed with the phenolic wastewater in the liquid inlet pipe in advance for pre-extraction, the contact time of the solvent ether and the phenolic wastewater is longer, the dephenolization amount in the whole dephenolization process is improved, the phenol emission is reduced, the economic benefit of a production system is improved, and the use amount of the solvent phenol is reduced.
Description of the drawings:
fig. 1 is a schematic structural view of the present utility model.
In the figure: the extraction tower 1, a liquid inlet pipe 2, a solvent storage tank 3, an extract tank 4, a solvent liquid discharge pipe 5, a return pipe 6, a regeneration valve 7, a return flow regulating valve 8, a liquid inlet regulating valve 9 and a static mixer 10.
The specific embodiment is as follows:
as shown in fig. 1, the pre-extraction phenol recovery system comprises an extraction tower 1, wherein a liquid inlet of the extraction tower 1 is connected with a liquid inlet pipe 2, a water outlet of the extraction tower 1 is connected with a water inlet of a sewage treatment system through a pipeline, a solvent inlet of the extraction tower 1 is connected with a liquid outlet of a solvent storage tank 3 through a pipeline, a liquid inlet of the solvent storage tank 3 is connected with a solvent outlet of a regeneration tower through a pipeline, a solvent outlet of the extraction tower 1 is connected with a liquid inlet of an extract tank 4 through a pipeline, a liquid outlet of the extract tank 4 is connected with a solvent liquid outlet pipe 5, a liquid outlet of the extract tank 4 is also connected with one end of a return pipe 6, and the other end of the return pipe 6 is connected with the liquid inlet pipe 2; a regeneration valve 7 is installed on the solvent drain pipe 5, and a reflux regulating valve 8 is installed on the reflux pipe 6;
injecting the part of phenol-containing wastewater with the total phenol content of 5000mg/L after being treated by the deacidification tower from the top of the extraction tower 1, simultaneously injecting solvent ether in a solvent storage tank 3 from the bottom of the extraction tower 1, fully contacting the phenol-containing wastewater with the solvent ether in the extraction tower 1, extracting phenol in the phenol-containing wastewater into the solvent ether, discharging the dephenolized wastewater to a sewage treatment system for treatment, discharging the phenol-containing ether and a small amount of mixed phenol-containing wastewater from the middle of the extraction tower 1 into an extract tank 4, opening a regeneration valve 7, closing a reflux regulating valve 8, delivering to a regeneration tower for regeneration, and delivering the regenerated solvent ether to the solvent storage tank 3 for recycling;
in order to ensure the dephenolization effect of the extraction tower 1, the regeneration valve 7 can be closed according to actual use conditions, the phenolic ether and a small amount of mixed phenolic wastewater in the extract tank 4 are blocked to be directly discharged to the regeneration tower, the reflux regulating valve 8 is opened, the phenolic ether and a small amount of mixed phenolic wastewater are discharged back to the liquid inlet pipe 2 of the extraction tower 1, the phenolic ether and the phenolic wastewater are mixed in the liquid inlet pipe 2 in advance for pre-extraction, the contact time of the solvent ether and the phenolic wastewater is longer, the dephenolization amount in the whole dephenolization process is improved, the total phenolic amount of the dephenolized water is reduced to 500mg/L, the phenolic emission is reduced, the economic benefit of a production system is improved, and the use amount of the solvent phenol is reduced.
The liquid inlet pipe 2 at the front end of the return pipe 6 is provided with a liquid inlet regulating valve 9, the communication end of the return regulating valve 8 is electrically connected with the communication end of the liquid inlet regulating valve 9, the opening of the liquid inlet regulating valve 9 is regulated according to the opening of the return regulating valve 8, namely, the opening of the liquid inlet regulating valve 9 is smaller as the opening of the return regulating valve 8 is larger, the flow rate and the flow rate of the liquid inlet regulating valve 9 are ensured to be kept in a certain range, and the normal operation of the extraction tower 1 is ensured.
A static mixer 10 is arranged on the liquid inlet pipe 2 between the return pipe 6 and the extraction tower 1, and solvent ether and phenol-containing wastewater are fully mixed through the static mixer 10, so that the dephenolization efficiency of the pre-extraction is improved.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (3)
1. The pre-extraction phenol recovery system is characterized by comprising an extraction tower, wherein a liquid inlet of the extraction tower is connected with a liquid inlet pipe, a water outlet of the extraction tower is connected with a water inlet of a sewage treatment system through a pipeline, a solvent inlet of the extraction tower is connected with a liquid outlet of a solvent storage tank through a pipeline, a liquid inlet of the solvent storage tank is connected with a solvent outlet of a regeneration tower through a pipeline, a solvent outlet of the extraction tower is connected with a liquid inlet of an extract tank through a pipeline, a liquid outlet of the extract tank is connected with a solvent liquid outlet pipe, a liquid outlet of the extract tank is also connected with one end of a return pipe, and the other end of the return pipe is connected with the liquid inlet pipe; and a regeneration valve is arranged on the solvent drain pipe, and a reflux regulating valve is arranged on the reflux pipe.
2. The pre-extracted phenol recovery system of claim 1, wherein a liquid inlet regulating valve is installed on the liquid inlet pipe at the front end of the return pipe, and a communication end of the return regulating valve is electrically connected with a communication end of the liquid inlet regulating valve.
3. A pre-extracted phenol recovery system according to claim 1 or 2, characterized in that a static mixer is mounted on the feed line between the return line and the extraction column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320405854.2U CN219526307U (en) | 2023-03-03 | 2023-03-03 | Pre-extraction phenol recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320405854.2U CN219526307U (en) | 2023-03-03 | 2023-03-03 | Pre-extraction phenol recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219526307U true CN219526307U (en) | 2023-08-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320405854.2U Active CN219526307U (en) | 2023-03-03 | 2023-03-03 | Pre-extraction phenol recovery system |
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| Country | Link |
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| CN (1) | CN219526307U (en) |
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2023
- 2023-03-03 CN CN202320405854.2U patent/CN219526307U/en active Active
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