CN211170601U - Liquid paraffin recovery system - Google Patents
Liquid paraffin recovery system Download PDFInfo
- Publication number
- CN211170601U CN211170601U CN201922336120.XU CN201922336120U CN211170601U CN 211170601 U CN211170601 U CN 211170601U CN 201922336120 U CN201922336120 U CN 201922336120U CN 211170601 U CN211170601 U CN 211170601U
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- China
- Prior art keywords
- pipeline
- hydrochloric acid
- liquid
- paraffin
- gas
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- 238000011084 recovery Methods 0.000 title claims abstract description 53
- 229940057995 liquid paraffin Drugs 0.000 title claims abstract description 38
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 107
- 239000007788 liquid Substances 0.000 claims abstract description 43
- 238000000605 extraction Methods 0.000 claims abstract description 31
- 239000012188 paraffin wax Substances 0.000 claims abstract description 27
- 238000010521 absorption reaction Methods 0.000 claims abstract description 15
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 238000005660 chlorination reaction Methods 0.000 claims description 5
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 230000005484 gravity Effects 0.000 description 6
- 239000000243 solution Substances 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The utility model relates to a liquid paraffin recovery system belongs to the technical field of chlorinated paraffin production. Comprises an extraction recovery tower, a temporary hydrochloric acid storage tank, a gas-liquid separator and a hydrochloric acid storage tank; the extraction and recovery tower is provided with a tail liquid pipeline, a paraffin recovery pipeline, a paraffin inlet pipeline and a hydrochloric acid recovery pipeline; the recovered hydrochloric acid pipeline is connected with the temporary hydrochloric acid storage tank; the hydrochloric acid temporary storage tank is connected with a gas-liquid separator through a gas-liquid separator inlet pipeline, and the gas-liquid separator is provided with a gas pipeline and a separated liquid outlet pipeline; the separated liquid outlet pipeline is connected with a hydrochloric acid storage tank; the gas pipeline is connected with the tail gas absorption device. The utility model has the advantages that: (1) by arranging the extraction recovery tower, the loss of the liquid paraffin is greatly reduced, and the production cost is reduced; (2) safety risks in production are minimized.
Description
Technical Field
The utility model relates to a technical field of chlorinated paraffin production, concretely relates to liquid paraffin recovery system.
Background
In the prior light chlorinated paraffin production process, the tail gas absorption process has more liquid paraffin entrained by dilute hydrochloric acid, namelyOn the aspect, the part of liquid paraffin cannot be recycled, and certain waste and loss are brought to a company in cost; on the other hand, a small amount of liquid paraffin carried by the dilute hydrochloric acid enters the hydrochloric acid storage tank along with the dilute hydrochloric acid, and the specific gravity of the liquid paraffin is 0.76kg/cm3Lower than 1.1kg/cm of dilute hydrochloric acid3. After the liquid paraffin enters the hydrochloric acid storage tank, the liquid paraffin floats on the liquid level. Along with the accumulation of time, the liquid paraffin at the upper part of the hydrochloric acid storage tank is accumulated more and more, and the liquid level thickness of the liquid paraffin can reach 0.3 m at most. Because the flash point of the part of liquid paraffin is very low, the flash explosion accident is easy to happen under the condition that the temperature in the dilute hydrochloric acid storage tank is high. Therefore, it is also required to eliminate this part of the liquid paraffin in order to be safe.
SUMMERY OF THE UTILITY MODEL
To the more problem that causes the waste and have the potential safety hazard of the liquid paraffin that entrains among the tail gas of prior art dilute hydrochloric acid, the utility model provides a liquid paraffin recovery system to solve production safety and the extravagant problem of material.
A liquid paraffin recovery system comprises an extraction recovery tower, a temporary hydrochloric acid storage tank, a gas-liquid separator and a hydrochloric acid storage tank. The extraction and recovery tower is provided with a tail liquid pipeline, a paraffin recovery pipeline, a paraffin inlet pipeline and a hydrochloric acid recovery pipeline; the recovered paraffin pipeline is positioned at the top of the extraction recovery tower; the recovered paraffin pipeline is directly connected to a chlorination system; the recovered hydrochloric acid pipeline is positioned at the bottom of the extraction recovery tower; the tail liquid pipeline is positioned at the upper part of the extraction recovery tower; the paraffin inlet pipeline is positioned at the lower part of the extraction and recovery tower; the recovered hydrochloric acid pipeline is connected with the temporary hydrochloric acid storage tank; the hydrochloric acid temporary storage tank is connected with a gas-liquid separator through a gas-liquid separator inlet pipeline, and the gas-liquid separator is provided with a gas pipeline and a separated liquid outlet pipeline; the separated liquid outlet pipeline is connected with a hydrochloric acid storage tank; the gas pipeline is connected with the tail gas absorption device.
Preferably, the extraction recovery tower is a sieve plate type extraction tower.
Preferably, the tail liquid pipeline is dilute hydrochloric acid of a chlorinated paraffin tail gas absorption system, and the tail liquid pipeline contains part of paraffin.
Preferably, all the pipelines are provided with valves.
Preferably, all of the tubes are tetrafluoro-lined tubes.
Preferably, the absorption liquid in the tail gas absorption device is a 20% sodium hydroxide aqueous solution.
The working principle of the utility model is that,
the specific gravity of the liquid paraffin is different from that of the hydrochloric acid, and the specific gravity of the liquid paraffin is 0.76kg/cm3The specific gravity of the hydrochloric acid is 1.1kg/cm3. In the extraction recovery tower, hydrochloric acid is located at the lower part of the tower due to a large specific gravity, and liquid paraffin is located at the upper part of the tower due to a small specific gravity. After entering the extraction and recovery tower, the dilute hydrochloric acid from the chlorinated paraffin tail gas absorption system is mixed with the liquid paraffin in the paraffin inlet pipeline of the extraction and recovery tower, a small amount of liquid paraffin in the dilute hydrochloric acid is absorbed by the liquid paraffin in the tower, the dilute hydrochloric acid downwards enters the hydrochloric acid at the lower part, and the liquid paraffin flows into the chlorination system along with the liquid paraffin at the upper part. The completely purified dilute hydrochloric acid enters a hydrochloric acid temporary storage tank through a recovered hydrochloric acid pipeline at the bottom of an extraction and recovery tower, the dilute hydrochloric acid is discharged from the hydrochloric acid temporary storage tank and then passes through a gas-liquid separator, a small amount of entrained gas in the dilute hydrochloric acid enters a tail gas system, and the dilute hydrochloric acid is separated and then enters a hydrochloric acid storage tank.
The utility model has the advantages that:
(1) the utility model discloses a set up extraction recovery tower, separate the liquid paraffin that smugglies secretly with the dilute hydrochloric acid among the tail gas absorption process and retrieve with the dilute hydrochloric acid, the liquid paraffin after retrieving directly gets into chlorination system and produces, has reduced liquid paraffin's loss so widely, has reduced manufacturing cost.
(2) The utility model discloses a separation to liquid paraffin among the dilute hydrochloric acid is retrieved, has avoided liquid paraffin to take place the danger of flashover because of the temperature is high in the hydrochloric acid jar, and the safety risk in with the production falls to minimumly.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of the system of the present invention.
In the figure, 1-tail liquid pipeline, 2-extraction recovery tower, 3-hydrochloric acid recovery pipeline, 4-paraffin inlet pipeline, 5-paraffin recovery pipeline, 6-hydrochloric acid temporary storage tank, 7-gas-liquid separator, 8-gas-liquid separator inlet pipeline, 9-separated liquid outlet pipeline, 10-gas pipeline, 11-hydrochloric acid storage tank and 12-tail gas absorption device.
Detailed Description
In order to make the technical solutions in the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
Example 1
A liquid paraffin recovery system comprises an extraction recovery tower 2, a temporary hydrochloric acid storage tank 6, a gas-liquid separator 7 and a hydrochloric acid storage tank 11. The extraction and recovery tower 2 is provided with a tail liquid pipeline 1, a paraffin recovery pipeline 5, a paraffin inlet pipeline 4 and a hydrochloric acid recovery pipeline 3; the recovery tower 2 is a sieve plate type extraction tower; the recovered paraffin pipeline 5 is positioned at the top of the extraction and recovery tower 2; the recovered paraffin pipeline 5 is directly connected to a chlorination system; the recovered hydrochloric acid pipeline 3 is positioned at the bottom of the extraction and recovery tower 2; the tail liquid pipeline 1 is positioned at the upper part of the extraction and recovery tower 2; the paraffin inlet pipeline 4 is positioned at the lower part of the extraction and recovery tower 2; the recovered hydrochloric acid pipeline 3 is connected with a temporary hydrochloric acid storage tank 6; the hydrochloric acid temporary storage tank 6 is connected with a gas-liquid separator 7 through a gas-liquid separator inlet pipeline 8, and the gas-liquid separator 8 is provided with a gas pipeline 10 and a separated liquid outlet pipeline 9; the separated liquid outlet pipeline 9 is connected with a hydrochloric acid storage tank 11; the gas pipeline 10 is connected with a tail gas absorption device 12; the tail gas absorption device is a 20% sodium hydroxide aqueous solution; all the pipelines are lining tetrafluoro pipelines and are provided with valves.
Although the present invention has been described in detail by referring to the drawings in conjunction with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and substance of the present invention, and these modifications or substitutions are intended to be within the scope of the present invention/any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. A liquid paraffin recovery system is characterized by comprising an extraction recovery tower, a temporary hydrochloric acid storage tank, a gas-liquid separator and a hydrochloric acid storage tank; the extraction and recovery tower is provided with a tail liquid pipeline, a paraffin recovery pipeline, a paraffin inlet pipeline and a hydrochloric acid recovery pipeline; the recovered paraffin pipeline is positioned at the top of the extraction recovery tower; the recovered paraffin pipeline is directly connected to a chlorination system; the recovered hydrochloric acid pipeline is positioned at the bottom of the extraction recovery tower; the tail liquid pipeline is positioned at the upper part of the extraction recovery tower; the paraffin inlet pipeline is positioned at the lower part of the extraction and recovery tower; the recovered hydrochloric acid pipeline is connected with the temporary hydrochloric acid storage tank; the hydrochloric acid temporary storage tank is connected with a gas-liquid separator through a gas-liquid separator inlet pipeline, and the gas-liquid separator is provided with a gas pipeline and a separated liquid outlet pipeline; the separated liquid outlet pipeline is connected with a hydrochloric acid storage tank; the gas pipeline is connected with the tail gas absorption device.
2. The liquid paraffin recovery system of claim 1, wherein the extractive recovery column is a sieve-plate type extraction column.
3. The liquid paraffin recovery system of claim 1, wherein the tail liquid pipeline is dilute hydrochloric acid of a chlorinated paraffin tail gas absorption system.
4. The liquid paraffin recovery system of claim 1, wherein all of the pipes are provided with valves.
5. The liquid paraffin recovery system of claim 1, wherein all of the tubes are tetrafluorolined tubes.
6. The liquid paraffin recovery system of claim 1, wherein the absorption liquid in the tail gas absorption device is a 20% sodium hydroxide aqueous solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922336120.XU CN211170601U (en) | 2019-12-20 | 2019-12-20 | Liquid paraffin recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922336120.XU CN211170601U (en) | 2019-12-20 | 2019-12-20 | Liquid paraffin recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211170601U true CN211170601U (en) | 2020-08-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922336120.XU Active CN211170601U (en) | 2019-12-20 | 2019-12-20 | Liquid paraffin recovery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211170601U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115232645A (en) * | 2022-08-17 | 2022-10-25 | 山东沾化阳光化学有限公司 | Refining process and equipment for recovering hydrochloric acid in chlorinated paraffin production process |
-
2019
- 2019-12-20 CN CN201922336120.XU patent/CN211170601U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115232645A (en) * | 2022-08-17 | 2022-10-25 | 山东沾化阳光化学有限公司 | Refining process and equipment for recovering hydrochloric acid in chlorinated paraffin production process |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A liquid paraffin recovery system Effective date of registration: 20231123 Granted publication date: 20200804 Pledgee: Bank of Dongying Limited by Share Ltd. Binzhou Zhanhua branch Pledgor: Shandong Zhanhua sunshine Chemical Co.,Ltd. Registration number: Y2023980067139 |