In-situ circulating hydrate promoter capable of continuously separating carbon dioxide, apparatus and method thereof

A technology of hydrate accelerator and carbon dioxide, which is applied in separation methods, chemical instruments and methods, and separation of dispersed particles, and can solve problems such as high operating costs, complex processes, and inability to achieve continuous absorption.

Active Publication Date: 2017-07-04
长沙紫宸科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this high-pressure, airtight and long-term hydration reaction requires large investment, high energy consumption, small processing capacity, and cannot be processed continuously.
[0008] CN103304479B discloses a CO 2 Hydrate accelerator, using dodecylbenzenesulfonic acid compound as hydrate accelerator, can greatly shorten CO 2 Hydrate induction period, that is, the crystal nucleus formation time, but the hydration accelerator solution in the high-pressure reactor, that is, the aqueous solution of the surface-active ionic liquid, must be vacuumed for 30 minutes, and then pressed into the pure CO 2 , and stirred with 500rpm magnetic force, after a long time, vacuum pretreatment, and then press into the pure CO at a high pressure of 3-5MPa 2 And high-speed stirring to shorten the induction period, for the CO in the continuous flue gas of industrial kiln 2 Capture missing applicability
However, there are still the following technical defects: (1) high-speed stirring in a magnetic stirrer at a speed of 400 to 500 rpm in an autoclave; (2) pure CO 2 Press in, and the specific operating pressure in the embodiment is 2.6MPa, 3.2MPa, 4.2MPa, the operating pressure is relativ

Method used

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  • In-situ circulating hydrate promoter capable of continuously separating carbon dioxide, apparatus and method thereof
  • In-situ circulating hydrate promoter capable of continuously separating carbon dioxide, apparatus and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0050] like figure 1 As shown, a device for continuously separating carbon dioxide, the device is a double-tower circulation capture tower 1, 2 with the same structure; Gas and liquid discharge device 1-1, 2-1, cold / heat exchange device 1-2, 2-2, wire mesh large space capture-release bed 1-3, 2-3, atomization spray device 1 -4, 2-4, liquid-gas separation device 1-5, 2-5, the top of the double-tower circulation trapping tower 1, 2 is also equipped with rich N 2 Discharge line 1-6, 2-6, CO 2 Discharge pipelines 1-7, 2-7 and temperature and pressure sensing devices 1-8, 2-8; the N-rich 2 There are CO on the discharge pipeline 1-6 and 2-6 2 online monitor, the CO 2 N 2 , O 2 On-line monitor; the gas distribution and liquid discharge devices 1-1 and 2-1 are connected to the atomizing spray devices 1-4 and 2-4 at the same time, and can be installed in the double-tower circulation capture towers 1 and 2 Switch between them at will; the wire mesh large space capture-release bed...

Embodiment 1

[0052] The main component (v / v) of the captured flue gas in this example is N 2 : 76%, CO 2 : 18%, O 2 : 5.6%.

[0053] Firstly, the in-situ circulating hydrate accelerator for continuous separation of carbon dioxide in Example 1 is made into an aqueous solution with a mass concentration of 5.8%; when capturing CO 2 When the flow pressure of the flue gas is 0.31MPa and the temperature is 4.5°C, the in-situ circulating hydrate accelerator solution of the flue gas and the atomized continuous separation of carbon dioxide flows in the opposite direction, and is captured in the large space of the wire mesh- In the release bed 1-3 or 2-3, CO in the flue gas is realized 2 continuous capture; when releasing CO 2 , reduce the pressure to 0.1013MPa, and raise the temperature to 95°C to realize the in-situ disintegration and release of the solid crystalline hydrate solidified in the large-space capture-release bed of the wire mesh to remove CO 2 ;

[0054] like figure 1 As shown, ...

Embodiment 2

[0060] The main component (v / v) of the captured flue gas in this example is N 2 : 72.9%, CO 2 : 22.2%, O 2 : 4.7%.

[0061] Firstly, the in-situ circulating hydrate accelerator for continuous separation of carbon dioxide in Example 2 is made into an aqueous solution with a mass concentration of 9.5%; when capturing CO 2 When the flow pressure of the flue gas is 0.27MPa and the temperature is 8°C, the in-situ circulating hydrate accelerator solution of the flue gas and the continuously separated carbon dioxide after atomization flows in the opposite direction, and is captured in the large space of the wire mesh- In the release bed 1-3 or 2-3, CO in the flue gas is realized 2 continuous capture; when releasing CO 2 , reduce the pressure to 0.08MPa, and raise the temperature to 75°C to realize the in-situ disintegration and release of the solid crystalline hydrate solidified in the large-space capture-release bed of the wire mesh to remove CO 2 ;

[0062] The double-tower c...

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Abstract

The invention relates to an in-situ circulating hydrate promoter capable of continuously separating carbon dioxide, an apparatus and a method thereof. The hydrate promoter comprises a heterocyclic compound, quaternary ammonium salt, an organosilicon surfactant and a carbonic ester compound. The apparatus is a twin-tower or multi-tower cycle trapping tower having a same structure; the trapping comprises a gas inlet/distribution and liquid discharge device, a cold/heat exchange device, a screen mesh large space trapping-releasing bed, an atomization spray apparatus, and a liquid-gas separating apparatus which are arranged from lower to upper, and a N2 and CO2-riched discharge pipeline and a warm-pressing induction apparatus are arranged at the top of the trapping tower. The method comprises the following steps: preparing a promoter to an aqueous solution; under conditions of 0.1013-1.0 MPa and the temperature of 0-20 DEG C, trapping CO2; and under conditions of less than 0.1013 MPa and the temperature of 50-100 DEG C, removing CO2. The trapping rate of the CO2 can reach as high as 91.3%, the separated CO2 purity can reach as high as 98.7%; the method is novel and simple, and is adapted to industrial production.

Description

technical field [0001] The invention relates to an in-situ circulating hydrate accelerator, device and method for continuous separation of carbon dioxide, in particular to an in-situ circulating hydrate accelerator, device and method suitable for continuous separation of carbon dioxide from large-flow flue gas in industrial kilns. Background technique [0002] With the development of the economy, the greenhouse effect is becoming more and more serious, forcing more and more countries and international organizations to show great concern about CCS technology. my country is a big coal-burning country, to achieve CO 2 Emissions reduction targets, separation and capture of CO from industrial kiln flue gas emissions 2 Especially crucial. Traditional CO 2 Separation methods include cryogenic fractionation, chemical absorption, physical absorption and membrane separation. However, in industrial applications, these methods have disadvantages such as heavy pollution, high energy ...

Claims

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Application Information

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IPC IPC(8): B01D53/79B01D53/62B01D53/96
CPCB01D53/62B01D53/79B01D53/96B01D2257/504B01D2258/0283Y02A50/20Y02C20/40
Inventor 尹小林
Owner 长沙紫宸科技开发有限公司
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