CN105783422A - Method and system for producing liquid-state laughing gas with adipic acid tail gas - Google Patents
Method and system for producing liquid-state laughing gas with adipic acid tail gas Download PDFInfo
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- CN105783422A CN105783422A CN201610270044.5A CN201610270044A CN105783422A CN 105783422 A CN105783422 A CN 105783422A CN 201610270044 A CN201610270044 A CN 201610270044A CN 105783422 A CN105783422 A CN 105783422A
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- adipic acid
- gas
- nitrogen
- heat exchanger
- pipeline
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/0204—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the feed stream
Abstract
The invention provides a method and system for producing liquid-state laughing gas with adipic acid tail gas. The system for producing the liquid-state laughing gas with the adipic acid tail gas comprises a heat exchanger, and a rectifying tower used for performing rectification on the cooled adipic acid tail gas, wherein the rectifying tower is connected with the heat exchanger through a pipeline. The method for producing the liquid-state laughing gas with the adipic acid tail gas includes the steps that the adipic acid tail gas is compressed; the adipic acid tail gas subjected to a preprocessing procedure is compressed again; the compressed adipic acid tail gas is subjected to decarbonization processing and drying processing; and rectification is performed on the adipic acid tail gas subjected to decarbonization processing and drying processing. By means of the technical scheme, liquid-state separation and purification can be performed on the adipic acid device tail gas, and the liquid-state laughing gas product according with medical grade purification is produced. The technological process is simple, operation is easy, the problem that emission of the adipic acid tail gas containing N2O pollutes the environment is solved, clean production is achieved, and meanwhile the additional value of the product is improved.
Description
Technical field
The present invention relates to the recycling field of tail gas, particularly relate to a kind of method and system utilizing adipic acid End gas production liquid laughing gas.
Background technology
Adipic acid is a kind of important fine chemical product, generally, often produces the N of 1mol adipic acid by-product 0.8～1.0mol2O, N2O is a kind of gas potentially resulting in greenhouse effect and ozone layer minimizing, and it is CO that its unimolecule heats potentiality2298 times, therefore, the directly discharge of adipic acid tail gas can cause greenhouse effect.Along with the demand of adipic acid is increasing, adipic acid production scale constantly expands, containing N2The improvement of O tail gas is just particularly important.
N2O is commonly called as " laughing gas ", has oxidisability and anesthetic action, is widely used in medical treatment, electron trade, is a kind of gas products with good economic worth.
Containing N2O tail gas is directly discharged to air, not only results in environmental pollution, also can cause the serious wasting of resources, therefore adipic acid tail gas is carried out recycling and seems particularly significant, and has considerable economic benefit.
At present, domestic laughing gas market is well sold and in short supply, and the laughing gas of the overwhelming majority will from external import, and import price is higher.Domestic but without from adipic acid tail gas or other are containing N2O mixing gas is produced the technical scheme of liquid laughing gas.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of effective minimizing and pollutes and the method and system utilizing adipic acid End gas production liquid laughing gas of waste.
The system utilizing adipic acid End gas production liquid laughing gas of the present invention, including:
For the heat exchanger that adipic acid tail gas is cooled down；
For the adipic acid tail gas after cooling is carried out rectification, make adipic acid tail gas separation go out the rectifying column of rich nitrogen, liquid laughing gas, be connected by pipeline with described heat exchanger.
The system utilizing adipic acid End gas production liquid laughing gas of the present invention, wherein, the rich nitrogen outlet of the overhead separator of described rectifying column and the first pipeline connect, described first pipeline connects with the entrance of first throttle valve after heat exchanger, so that the rich nitrogen in the first pipeline is lowered the temperature by the throttling of first throttle valve after being cooled by heat exchanger.
nullThe system utilizing adipic acid End gas production liquid laughing gas of the present invention，Wherein，Described rectifying device also includes nitrogen refrigeration system，Described nitrogen refrigeration system includes the nitrogen compressor for nitrogen is compressed，The gas outlet of nitrogen compressor passes through the second pipeline、3rd pipeline connection second throttle，Described second throttle connects the gas access of nitrogen compressor by reflux pipe，Described nitrogen circulates between nitrogen compressor and second throttle，Second pipeline sequentially passes through heat exchanger、With the 3rd pipeline connection after the tower bottom reboiler of rectifying column，Nitrogen in second pipeline is at heat exchanger、The tower bottom reboiler of rectifying column cools，3rd pipeline connects second throttle after heat exchanger，Nitrogen in 3rd pipeline provides cold in heat exchanger，Reflux pipe sequentially passes through the overhead condenser of rectifying column、Heat exchanger，Nitrogen in reflux pipe is at the overhead condenser of rectifying column、Heat exchanger provides cold.
The system utilizing adipic acid End gas production liquid laughing gas of the present invention, wherein, the liquid laughing gas outlet of the bottom of described rectifying column connects with liquid laughing gas discharge pipe, liquid laughing gas discharge pipe connects with the entrance of the 3rd choke valve after heat exchanger, so that the liquid laughing gas in liquid laughing gas discharge pipe is cooled by the 3rd choke valve throttling after being cooled by heat exchanger.
The system utilizing adipic acid End gas production liquid laughing gas of the present invention, wherein, also includes:
For the first adipic acid tail-gas compressor before cooling adipic acid tail gas being compressed；
For adipic acid tail gas after compression is carried out the cleaning equipment of carbonization treatment, dried, being connected by pipeline with described first adipic acid tail-gas compressor, cleaning equipment is connected by pipeline with heat exchanger.
The method utilizing adipic acid End gas production liquid laughing gas of the present invention, including:
Adipic acid tail gas is compressed；
Adipic acid tail gas after compression is carried out pretreatment process, makes adipic acid tail gas elimination acetylene；
For the adipic acid tail gas after carrying out pretreatment process is carried out recompression；
For adipic acid tail gas after compression is carried out carbonization treatment, dried；
For the adipic acid tail gas after carrying out carbonization treatment, dried is carried out rectification, adipic acid tail gas separation is made to go out rich nitrogen, liquid laughing gas.
nullThe method utilizing adipic acid End gas production liquid laughing gas of the present invention，Wherein，Also include: utilize the rectification that nitrogen refrigeration system is adipic acid tail gas to provide cold，Described nitrogen refrigeration system includes the nitrogen compressor for nitrogen is compressed，The gas outlet of nitrogen compressor passes through the second pipeline、3rd pipeline connection second throttle，Described second throttle connects the gas access of nitrogen compressor by reflux pipe，Described nitrogen circulates between nitrogen compressor and second throttle，Second pipeline sequentially passes through heat exchanger、With the 3rd pipeline connection after the tower bottom reboiler of rectifying column，Nitrogen in second pipeline is at heat exchanger、The tower bottom reboiler of rectifying column cools，3rd pipeline connects second throttle after heat exchanger，Nitrogen in 3rd pipeline provides cold in heat exchanger，Reflux pipe sequentially passes through the overhead condenser of rectifying column、Heat exchanger，Nitrogen in reflux pipe is at the overhead condenser of rectifying column、Heat exchanger provides cold.
The advantage of technical scheme is that adipic acid plant tail gas can carry out Liquid segregation, purification, produces and obtains meeting the liquid laughing gas product of medical grade purity.Technological process simply, easily operate, has both solved containing N2The problem of the adipic acid pollution emission environment of O, it is achieved that cleaning produces, has reclaimed again N simultaneously2O, improves value-added content of product, it is achieved that turns harm into good, turn waste into wealth, and has the important meaning of economy, ecological environment and social sustainable development.
Accompanying drawing explanation
Fig. 1 is the structural representation of the system utilizing adipic acid End gas production liquid laughing gas of the present invention.
Detailed description of the invention
As it is shown in figure 1, the system utilizing adipic acid End gas production liquid laughing gas of the present invention, including:
For the heat exchanger E1 that adipic acid tail gas is cooled down；
For the adipic acid tail gas after cooling is carried out rectification, make adipic acid tail gas separation go out the rectifying column T2 of rich nitrogen, liquid laughing gas, be connected by pipeline with heat exchanger.
The system utilizing adipic acid End gas production liquid laughing gas of the present invention, wherein, rich nitrogen outlet and first pipeline 11 of the overhead separator V1 of rectifying column T2 connect, first pipeline 11 connects with the entrance of first throttle valve V10 after heat exchanger, so that the rich nitrogen in the first pipeline is lowered the temperature by the throttling of first throttle valve after being cooled by heat exchanger.
nullThe system utilizing adipic acid End gas production liquid laughing gas of the present invention，Wherein，Rectifying device also includes nitrogen refrigeration system，Nitrogen refrigeration system includes the nitrogen compressor C2 for nitrogen is compressed，The gas outlet of nitrogen compressor passes through the second pipeline 12、3rd pipeline 13 connects second throttle V20，Second throttle connects the gas access of nitrogen compressor by reflux pipe 30，Nitrogen circulates between nitrogen compressor and second throttle，Second pipeline 12 sequentially passes through heat exchanger E1、Connect with the 3rd pipeline 13 after the tower bottom reboiler E2 of rectifying column，Nitrogen in second pipeline is at heat exchanger、The tower bottom reboiler of rectifying column cools，3rd pipeline connects second throttle V20 after heat exchanger，Nitrogen in 3rd pipeline provides cold in heat exchanger，Reflux pipe sequentially passes through the overhead condenser E3 of rectifying column、Heat exchanger，Nitrogen in reflux pipe is at the overhead condenser E3 of rectifying column、Heat exchanger E1 provides cold.
The system utilizing adipic acid End gas production liquid laughing gas of the present invention, wherein, the liquid laughing gas outlet of the bottom of rectifying column connects with liquid laughing gas discharge pipe 40, liquid laughing gas discharge pipe 40 connects with the entrance of the 3rd choke valve V30 after heat exchanger E1, so that the liquid laughing gas in liquid laughing gas discharge pipe is cooled by the 3rd choke valve throttling after being cooled by heat exchanger.
The system utilizing adipic acid End gas production liquid laughing gas of the present invention, wherein, also includes:
For the first adipic acid tail-gas compressor C1 before cooling adipic acid tail gas being compressed；
For adipic acid tail gas after compression is carried out the cleaning equipment T1 of carbonization treatment, dried, being connected by pipeline with the first adipic acid tail-gas compressor C1, cleaning equipment T1 is connected by pipeline with heat exchanger E1.
The system utilizing adipic acid End gas production liquid laughing gas of the present invention, wherein, also includes:
For the adipic acid tail gas after compression is carried out pretreatment process, make the pretreatment unit of adipic acid tail gas elimination acetylene, be connected by pipeline with the first adipic acid tail-gas compressor；
For the adipic acid tail gas after carrying out pretreatment process carries out the second adipic acid tail-gas compressor of recompression, being connected by pipeline with pretreatment unit, the second adipic acid tail-gas compressor is connected by pipeline with cleaning equipment T1.
The method utilizing adipic acid End gas production liquid laughing gas of the present invention, including:
Adipic acid tail gas is compressed；
Adipic acid tail gas after compression is carried out pretreatment process, makes adipic acid tail gas elimination acetylene；
For the adipic acid tail gas after carrying out pretreatment process is carried out recompression；
For adipic acid tail gas after compression is carried out carbonization treatment, dried；
For the adipic acid tail gas after carrying out carbonization treatment, dried is carried out rectification, adipic acid tail gas separation is made to go out rich nitrogen, liquid laughing gas.
nullThe method utilizing adipic acid End gas production liquid laughing gas of the present invention，Wherein，Also include: utilize the rectification that nitrogen refrigeration system is adipic acid tail gas to provide cold，Nitrogen refrigeration system includes the nitrogen compressor for nitrogen is compressed，The gas outlet of nitrogen compressor passes through the second pipeline、3rd pipeline connection second throttle，Second throttle connects the gas access of nitrogen compressor by reflux pipe，Nitrogen circulates between nitrogen compressor and second throttle，Second pipeline sequentially passes through heat exchanger、With the 3rd pipeline connection after the tower bottom reboiler of rectifying column，Nitrogen in second pipeline is at heat exchanger、The tower bottom reboiler of rectifying column cools，3rd pipeline connects second throttle after heat exchanger，Nitrogen in 3rd pipeline provides cold in heat exchanger，Reflux pipe sequentially passes through the overhead condenser of rectifying column、Heat exchanger，Nitrogen in reflux pipe is at the overhead condenser of rectifying column、Heat exchanger provides cold.
As it is shown in figure 1, utilize the embodiment of the method utilizing adipic acid End gas production liquid laughing gas that the system utilizing adipic acid End gas production liquid laughing gas of the present invention carries out the present invention as follows:
The component of adipic acid tail gas is as shown in table 1, and pressure 2bar, temperature 40 DEG C, flow are 2000Nm3/ h, enters the first adipic acid tail-gas compressor C1, is compressed to 11bar through the first compression section, then carries out pretreatment process, removes acetylene impurities, and pretreated gas enters the second compression section and is compressed to 25bar, enters cleaning equipment T1 and purifies, makes CO in gas2Content≤20ppm, tail gas dew point≤-65 DEG C, to deliver to heat exchanger E1 afterwards and be cooled to-60 DEG C, send into rectifying column T2 rectification, the liquid phase material at the bottom of rectifying tower constantly heats through the tower bottom reboiler E2 of rectifying column, and light component is constantly evaporated, N2O constantly concentrates, and finally obtains liquid laughing gas from separation at the bottom of tower, supercool through heat exchanger E1 cooling, obtains medical grade liquid laughing gas product then through after the 3rd choke valve V30 throttling, and flow is 630Nm3/ h, temperature is-60 DEG C, and pressure is 0.5MPaG, and laughing gas component is as shown in table 1.
The overhead stream of rectifying column T2 is through the continuous reflux condensation mode of overhead condenser E3, and in overhead separator V1, heavy constituent is separated gets off, and sends back to rectifying column T2, the isolated light component of overhead separator V1 be mainly rich nitrogen, and flow is 1196Nm3/ h, temperature is-120 DEG C, and pressure is 1.9MPaG, delivers to heat exchanger E1 rewarming to room temperature, and decompression is delivered to cleaning equipment T1 and used as regeneration gas.
0.08MPaG, 32 DEG C, 7000Nm3After the nitrogen entrance nitrogen compressor C2 of/h is compressed to 1.0MPaG, enter heat exchanger E1 be cooled to 5 DEG C, enter rectifying column tower bottom reboiler E2 after be cooled to-8 DEG C, return again to heat exchanger E1 be cooled to-60 DEG C further, be depressurized to-123 DEG C/2bar through second throttle V20, then through the overhead condenser E3 heat exchange of rectifying column after be warming up to-92 DEG C, return heat exchanger E1 rewarming to room temperature, finally enter the entrance of nitrogen compressor C2, complete refrigerant cycle.
The system utilizing adipic acid End gas production liquid laughing gas of the present invention, wherein, pretreatment unit includes the feed gas heater, the acetylene reactor that link together.
The system utilizing adipic acid End gas production liquid laughing gas of the present invention, wherein, cleaning equipment includes absorption tower, regenerator, drying tower.
The each material component table of table 1
Below it is only the preferred embodiment of the present invention; it should be pointed out that, for those skilled in the art, under the premise without departing from the principles of the invention; can also making some improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (7)
1. the system utilizing adipic acid End gas production liquid laughing gas, it is characterised in that including:
For the heat exchanger that adipic acid tail gas is cooled down；
For the adipic acid tail gas after cooling is carried out rectification, make adipic acid tail gas separation go out the rectifying column of rich nitrogen, liquid laughing gas, be connected by pipeline with described heat exchanger.
2. utilize the system of adipic acid End gas production liquid laughing gas as claimed in claim 1, it is characterized in that, the rich nitrogen outlet of the overhead separator of described rectifying column and the first pipeline connect, described first pipeline connects with the entrance of first throttle valve after heat exchanger, so that the rich nitrogen in the first pipeline is lowered the temperature by the throttling of first throttle valve after being cooled by heat exchanger.
null3. utilize the system of adipic acid End gas production liquid laughing gas as claimed in claim 2，It is characterized in that，Described rectifying device also includes nitrogen refrigeration system，Described nitrogen refrigeration system includes the nitrogen compressor for nitrogen is compressed，The gas outlet of nitrogen compressor passes through the second pipeline、3rd pipeline connection second throttle，Described second throttle connects the gas access of nitrogen compressor by reflux pipe，Described nitrogen circulates between nitrogen compressor and second throttle，Second pipeline sequentially passes through heat exchanger、With the 3rd pipeline connection after the tower bottom reboiler of rectifying column，Nitrogen in second pipeline is at heat exchanger、The tower bottom reboiler of rectifying column cools，3rd pipeline connects second throttle after heat exchanger，Nitrogen in 3rd pipeline provides cold in heat exchanger，Reflux pipe sequentially passes through the overhead condenser of rectifying column、Heat exchanger，Nitrogen in reflux pipe is at the overhead condenser of rectifying column、Heat exchanger provides cold.
4. utilize the system of adipic acid End gas production liquid laughing gas as claimed in claim 3, it is characterized in that, the liquid laughing gas outlet of the bottom of described rectifying column connects with liquid laughing gas discharge pipe, liquid laughing gas discharge pipe connects with the entrance of the 3rd choke valve after heat exchanger, so that the liquid laughing gas in liquid laughing gas discharge pipe is cooled by the 3rd choke valve throttling after being cooled by heat exchanger.
5. utilize the system of adipic acid End gas production liquid laughing gas as claimed in claim 4, it is characterised in that also include:
For the first adipic acid tail-gas compressor before cooling adipic acid tail gas being compressed；
For adipic acid tail gas after compression is carried out the cleaning equipment of carbonization treatment, dried, being connected by pipeline with described first adipic acid tail-gas compressor, cleaning equipment is connected by pipeline with heat exchanger.
6. the method utilizing adipic acid End gas production liquid laughing gas, it is characterised in that including:
Adipic acid tail gas is compressed；
Adipic acid tail gas after compression is carried out pretreatment process, makes adipic acid tail gas elimination acetylene；
For the adipic acid tail gas after carrying out pretreatment process is carried out recompression；
For adipic acid tail gas after compression is carried out carbonization treatment, dried；
For the adipic acid tail gas after carrying out carbonization treatment, dried is carried out rectification, adipic acid tail gas separation is made to go out rich nitrogen, liquid laughing gas.
null7. the method utilizing adipic acid End gas production liquid laughing gas as claimed in claim 6，It is characterized in that，Also include: utilize the rectification that nitrogen refrigeration system is adipic acid tail gas to provide cold，Described nitrogen refrigeration system includes the nitrogen compressor for nitrogen is compressed，The gas outlet of nitrogen compressor passes through the second pipeline、3rd pipeline connection second throttle，Described second throttle connects the gas access of nitrogen compressor by reflux pipe，Described nitrogen circulates between nitrogen compressor and second throttle，Second pipeline sequentially passes through heat exchanger、With the 3rd pipeline connection after the tower bottom reboiler of rectifying column，Nitrogen in second pipeline is at heat exchanger、The tower bottom reboiler of rectifying column cools，3rd pipeline connects second throttle after heat exchanger，Nitrogen in 3rd pipeline provides cold in heat exchanger，Reflux pipe sequentially passes through the overhead condenser of rectifying column、Heat exchanger，Nitrogen in reflux pipe is at the overhead condenser of rectifying column、Heat exchanger provides cold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610270044.5A CN105783422A (en) | 2016-04-27 | 2016-04-27 | Method and system for producing liquid-state laughing gas with adipic acid tail gas |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610270044.5A CN105783422A (en) | 2016-04-27 | 2016-04-27 | Method and system for producing liquid-state laughing gas with adipic acid tail gas |
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| CN105783422A true CN105783422A (en) | 2016-07-20 |
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| CN201610270044.5A Pending CN105783422A (en) | 2016-04-27 | 2016-04-27 | Method and system for producing liquid-state laughing gas with adipic acid tail gas |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109353999A (en) * | 2018-11-20 | 2019-02-19 | 天津市汇筑恒升科技有限公司 | The apparatus and method of electronic-grade dental gas in recycling and purifying industrial tail gas |
| CN111013382A (en) * | 2019-12-16 | 2020-04-17 | 中国天辰工程有限公司 | Tail gas treatment device and method for adipic acid production device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109353999A (en) * | 2018-11-20 | 2019-02-19 | 天津市汇筑恒升科技有限公司 | The apparatus and method of electronic-grade dental gas in recycling and purifying industrial tail gas |
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| CN111013382B (en) * | 2019-12-16 | 2024-01-16 | 中国天辰工程有限公司 | Tail gas treatment device and method for adipic acid production device |
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Application publication date: 20160720 |