CN107930346B - Ionic liquid heating and regenerating device - Google Patents
Ionic liquid heating and regenerating device Download PDFInfo
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- CN107930346B CN107930346B CN201710962268.7A CN201710962268A CN107930346B CN 107930346 B CN107930346 B CN 107930346B CN 201710962268 A CN201710962268 A CN 201710962268A CN 107930346 B CN107930346 B CN 107930346B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1425—Regeneration of liquid absorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1456—Removing acid components
- B01D53/1481—Removing sulfur dioxide or sulfur trioxide
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Abstract
The invention discloses an ionic liquid heating regeneration device which comprises a reboiler, a saturated steam condensate outlet pipe, a steam pressure balancing device, a high-temperature condensate collecting tank, a high-temperature condensate circulating pump, a comprehensive pipe network condensate pipe, a high-temperature condensate to ionic liquid inlet pipe, a circulating ionic liquid outlet pipe, a circulating ionic liquid inlet pipe and a saturated steam inlet pipe. The invention has the beneficial effects that: through providing a comparatively scientific and reasonable's of configuration process flow, newly-built or the transformation construction is simple and easy, for maintaining pressure balance, prevents the material and flows in series, sets up special steam pressure balancing unit between reboiler and high temperature condensate water holding tank. In the practical operation process of the field system, the operation is flexible, and the steam condensate is provided with two open circuits and can be flexibly adjusted according to different loads and different working conditions of production. The method is suitable for all processes of heating and regenerating the absorbent after circularly absorbing the sulfur dioxide by adopting the solution, and saves the steam consumption.
Description
Technical Field
The invention relates to a heating regeneration device, in particular to an ionic liquid heating regeneration device, and belongs to the field of ionic liquid treatment application.
Background
SO2The tail gas treatment method is many, there are more than ten kinds of processes according to the actual production conditions of each production unit, in recent years, the technology of circularly absorbing sulfur dioxide by ionic liquid (organic amine substances) is widely applied, and the technology has the advantages of high absorption efficiency, high absorption speed, mild absorption conditions, large absorption capacity, complete analysis, capability of being repeatedly recycled and the like, and the ionic liquid regeneration analysis adopts low-pressure saturated steam, the pressure is 0.3-0.5 kp, and the temperature is 120-160 ℃. In the actual production and operation process of the ionic liquid, due to the control reasons of the production organization and the process of the front-stage process, the content of sulfur dioxide in the waste gas entering the ionic liquid desulfurization system is increased, and the desulfurization system is controlled by increasing the circulation amount of the absorbent ionic liquid so as to meet the requirement of standard treatment of the tail gas, but the consumption of steam and desalted water heated by the ionic liquid is greatly increased, the energy consumption and the material consumption are increased, and the operation cost of the ionic liquid desulfurization system is improved.
Disclosure of Invention
The present invention has been made to solve the above problems, and an object of the present invention is to provide an ionic liquid heating and regenerating device.
The invention realizes the aim through the following technical scheme, and the ionic liquid heating and regenerating device comprises a reboiler, a steam pressure balancing device, a high-temperature condensed water collecting tank and a high-temperature condensed water circulating pump, wherein the top of the reboiler is connected with a circulating ionic liquid outlet pipe, and one side of the bottom of the reboiler is connected with a saturated steam condensate outlet pipe, one end of the saturated steam condensate outlet pipe is provided with a steam pressure balancing device, one end of the steam pressure balancing device is connected with a high-temperature condensed water collecting tank through a pipeline, one end of the high-temperature condensed water collecting tank is connected with a high-temperature condensed water circulating pump through a pipeline, one side of the high-temperature condensate water circulating pump is connected with a comprehensive pipe network condensate pipe, the middle part of the reboiler is close to one side of the saturated steam condensate water outlet pipe and is connected with a circulating ionic liquid inlet pipe, and one side of the circulating ionic liquid inlet pipe is connected with high-temperature condensate water to the ionic liquid inlet pipe.
Preferably, in order to effectively prevent the material from reversely crossing between the saturated steam condensate outlet pipe and the high-temperature condensate collecting tank and increase the safety of the operation during the operation of the device, the steam pressure balancing device is arranged between the saturated steam condensate outlet pipe and the high-temperature condensate collecting tank.
Preferably, in order to prolong the retention time of the saturated steam in the reboiler and ensure more sufficient reaction, a saturated steam inlet pipe is arranged on one side of the top of the reboiler, and the saturated steam inlet pipe is vertical to the reboiler.
Preferably, in order to enable the saturated steam and the ionic liquid to react more fully in the reboiler without being interfered by the outside, the saturated steam inlet pipe and the circulating ionic liquid inlet pipe both penetrate through the reboiler.
Preferably, in order to lead high-temperature condensed water into the reboiler and replenish system water during operation when the water quantity of the system is insufficient, the liquid level of each tower tank is kept stable, and water consumption is reduced, one end of the high-temperature condensed water to the ionic liquid inlet pipe is connected with a comprehensive pipe network condensed water pipe.
An ionic liquid heating regeneration method comprises the following steps:
firstly, circulating ionic liquid passes through a tube pass of a reboiler, saturated steam passes through a shell pass of the reboiler, the saturated steam enters from top to bottom and the circulating ionic liquid enters from bottom to top, and heat exchange is carried out in a countercurrent contact mode;
secondly, when the circulating ionic liquid absorbs sulfur dioxide and needs to be regenerated, the circulating ionic liquid is introduced into a reboiler to be heated to reach the required regeneration analysis temperature, and condensed water is formed after heat exchange between high-temperature saturated steam and low-temperature ionic liquid;
and thirdly, the temperature of the condensed water is about 80 ℃, the condensed water contains a large amount of heat, the open circuit of the condensed water can be divided into two paths according to different working conditions of water balance of the system, one path is that when the system has more water and the liquid level of each tower tank of the system is higher, the condensed water is introduced into a high-temperature condensed water collecting tank and then is merged into a condensed water pipe of a comprehensive pipe network through a high-temperature condensed water circulating pump for unified treatment, and the other path is that when the water quantity of the system is insufficient, the high-temperature condensed water can be introduced into a.
The invention has the beneficial effects that: through providing a process flow with more scientific and reasonable configuration, the new construction or the reconstruction construction is simple and easy to implement, the factors of safe and stable operation are considered, and a special steam pressure balancing device is arranged between the reboiler and the high-temperature condensed water collecting tank for maintaining the pressure balance and preventing the material from streaming. In the practical operation process of the field system, the operation is flexible, two open circuits are arranged on the steam condensate water, the steam condensate water can be flexibly adjusted according to different loads and different working conditions of production, and the optimized operation of various indexes of the production system is ensured. The method is suitable for all processes of heating and regenerating the absorbent after circularly absorbing the sulfur dioxide by adopting the solution, and saves the steam consumption.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
In the figure: 1. a reboiler; 2. a saturated steam condensate outlet pipe; 3. a steam pressure balancing device; 4. a high temperature condensate collection tank; 5. a high-temperature condensed water circulating pump; 6. a condensate pipe of the comprehensive pipe network; 7. condensing water at high temperature to an ionic liquid inlet pipe; 8. a circulating ionic liquid outlet pipe; 9. a circulating ionic liquid inlet pipe; 10. saturated steam inlet pipe.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an ionic liquid heating and regenerating device comprises a reboiler 1, a steam pressure balancing device 3, a high temperature condensed water collecting tank 4 and a high temperature condensed water circulating pump 5, wherein the top of the reboiler 1 is connected with a circulating ionic liquid outlet pipe 8, and one side of the bottom of the reboiler 1 is connected with a saturated steam condensate outlet pipe 2, one end of the saturated steam condensate outlet pipe 2 is provided with a steam pressure balancing device 3, and 3 one end of steam pressure balancing unit has high temperature condensate water to collect and irritate 4 through the pipe connection, 4 one end of high temperature condensate water collection and irritate has high temperature condensate water circulating pump 5 through the pipe connection, high temperature condensate water circulating pump 5 one side is connected with synthesizes pipe network condensate pipe 6, reboiler 1 middle part is close to saturated steam condensate water outlet pipe 2 one side and is connected with circulation ionic liquid import pipe 9, and circulation ionic liquid import pipe 9 one side is connected with high temperature condensate water to ionic liquid import pipe 7.
As a technical optimization scheme of the invention, the steam pressure balancing device 3 is arranged between the saturated steam condensate outlet pipe 2 and the high-temperature condensate collecting tank 4, so that the device can effectively prevent materials from being reversely strung between the saturated steam condensate outlet pipe 2 and the high-temperature condensate collecting tank 4 in the working process, and the working safety is improved.
As a technical optimization scheme of the invention, a saturated steam inlet pipe 10 is arranged on one side of the top of the reboiler 1, and the saturated steam inlet pipe 10 is vertical to the reboiler 1, so that the retention time of the saturated steam in the reboiler 1 is prolonged, and the reaction is more sufficient.
As a technical optimization scheme of the invention, a saturated steam inlet pipe 10 and a circulating ionic liquid inlet pipe 9 both penetrate through the reboiler 1, so that the saturated steam and the ionic liquid can react more fully in the reboiler 1 and are not interfered by the outside.
As a technical optimization scheme of the invention, one end of the high-temperature condensed water to the ionic liquid inlet pipe 7 is connected with the comprehensive pipe network condensed water pipe 6, so that when the water quantity of the system is insufficient in work, the high-temperature condensed water can be introduced into the reboiler 1, the water of the system can be supplemented, the liquid level of each tower tank is kept stable, and the water consumption is reduced.
An ionic liquid heating regeneration method comprises the following steps:
firstly, circulating ionic liquid passes through a tube pass of a reboiler 1, saturated steam passes through a shell pass of the reboiler 1, the saturated steam enters from top to bottom and the circulating ionic liquid enters from bottom to top, and heat exchange is carried out in a countercurrent contact mode;
secondly, when the circulating ionic liquid absorbs sulfur dioxide and needs to be regenerated, the circulating ionic liquid is introduced into a reboiler 1 for heating to reach the required regeneration analysis temperature, and condensed water is formed after heat exchange between high-temperature saturated steam and low-temperature ionic liquid;
and thirdly, the temperature of the condensed water is about 80 ℃, the condensed water contains a large amount of heat, the open circuit of the condensed water can be divided into two paths according to different working conditions of the water balance of the system, one path is that when the system has more water and the liquid level of each tower tank of the system is higher, the condensed water is introduced into a high-temperature condensed water collecting tank 4 and then is merged into a condensed water pipe 6 of a comprehensive pipe network through a high-temperature condensed water circulating pump 5 for unified treatment, and the other path is that when the water quantity of the system is insufficient, the high-temperature condensed water can be introduced into a.
When the ion exchange device is used, firstly, ionic liquid in the circulation process enters from a circulation ionic liquid inlet pipe 9 at the lower part of the reboiler 1, the ionic liquid is discharged from a circulation ionic liquid outlet pipe 8 at the upper part after heat exchange, saturated steam enters from a saturated steam inlet pipe 10 at the upper part of the reboiler 1, steam condensate water flows out from a saturated steam condensate water outlet pipe 2 at the lower part, and the two are in countercurrent contact for heat exchange. High temperature condensate water catch bowl 4, high temperature condensate water circulating pump 5 provides storage and power for the steam condensate water respectively, the steam condensate water of 80 ℃ of left and right sides is opened a way and is merged into comprehensive pipe network condensate pipe 6 after passing through the pump pressurization, another is opened a way and is merged into high temperature condensate water to ionic liquid import 7, reboiler 1 and high temperature condensate water catch bowl 4 are the seal equipment, for maintaining pressure balance, prevent the material streaming, set up steam pressure balancing unit 3 between reboiler 1 and high temperature condensate water catch bowl 4.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (2)
1. The utility model provides an ionic liquid heating regenerating unit, includes reboiler (1), steam pressure balancing unit (3), high temperature condensate water collection irritates (4) and high temperature condensate water circulating pump (5), its characterized in that: the top of the reboiler (1) is connected with a circulating ionic liquid outlet pipe (8), one side of the bottom of the reboiler (1) is connected with a saturated steam condensate outlet pipe (2), one end of the saturated steam condensate outlet pipe (2) is provided with a steam pressure balancing device (3), one end of the steam pressure balancing device (3) is connected with a high-temperature condensed water collecting tank (4) through a pipeline, one end of the high-temperature condensed water collecting tank (4) is connected with a high-temperature condensed water circulating pump (5) through a pipeline, one side of the high-temperature condensed water circulating pump (5) is connected with a comprehensive pipe network condensed water pipe (6), a circulating ionic liquid inlet pipe (9) is connected to one side of the middle part of the reboiler (1) close to the saturated steam condensate outlet pipe (2), one side of the circulating ionic liquid inlet pipe (9) is connected with high-temperature condensed water to the ionic liquid inlet pipe (7); the steam pressure balancing device (3) is arranged between the saturated steam condensate outlet pipe (2) and the high-temperature condensate collecting tank (4); a saturated steam inlet pipe (10) is installed on one side of the top of the reboiler (1), and the saturated steam inlet pipe (10) is vertical to the reboiler (1); the saturated steam inlet pipe (10) and the circulating ionic liquid inlet pipe (9) both penetrate through the reboiler (1); one end of the high-temperature condensed water to the ionic liquid inlet pipe (7) is connected with a comprehensive pipe network condensed water pipe (6).
2. An ionic liquid heating regeneration method is characterized in that: the method carries out ionic liquid heating regeneration by the ionic liquid heating regeneration device of claim 1, and comprises the following steps:
firstly, circulating ionic liquid passes through a tube pass of a reboiler (1), saturated steam passes through a shell pass of the reboiler (1), the saturated steam enters from top to bottom and the circulating ionic liquid enters from bottom to top, and heat exchange is carried out in a countercurrent contact mode;
secondly, when the circulating ionic liquid absorbs sulfur dioxide and needs to be regenerated, the sulfur dioxide is introduced into a reboiler (1) for heating to reach the required regeneration analysis temperature, and condensed water is formed after heat exchange between high-temperature saturated steam and low-temperature ionic liquid;
and thirdly, the temperature of the condensed water is about 80 ℃, the condensed water contains a large amount of heat, the open circuit of the condensed water is divided into two paths according to different working conditions of the water balance of the system, one path is that the condensed water is introduced into a high-temperature condensed water collecting tank (4) when the system water is more and the liquid level of each tower tank of the system is higher, and then the condensed water is merged into a condensed water pipe (6) of a comprehensive pipe network through a high-temperature condensed water circulating pump (5) and then is uniformly treated, and the other path is that the high-temperature condensed water is introduced into a circulating ionic liquid inlet pipe (.
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| CN201710962268.7A CN107930346B (en) | 2017-10-17 | 2017-10-17 | Ionic liquid heating and regenerating device |
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| CN201710962268.7A CN107930346B (en) | 2017-10-17 | 2017-10-17 | Ionic liquid heating and regenerating device |
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| US7056482B2 (en) * | 2003-06-12 | 2006-06-06 | Cansolv Technologies Inc. | Method for recovery of CO2 from gas streams |
| US20090151318A1 (en) * | 2007-12-13 | 2009-06-18 | Alstom Technology Ltd | System and method for regenerating an absorbent solution |
| US8127938B2 (en) * | 2009-03-31 | 2012-03-06 | Uop Llc | Apparatus and process for treating a hydrocarbon stream |
| CN102258928B (en) * | 2011-05-18 | 2013-12-25 | 成都华西工业气体有限公司 | Pressurized heat regeneration procedure of desulfurization solvent in flue gas desulfurization by utilizing solvent cycle absorption method |
| CN102872680B (en) * | 2012-09-26 | 2016-08-17 | 中国恩菲工程技术有限公司 | Flue gas desulphurization system and fume desulphurization method |
| CN103055527A (en) * | 2013-01-11 | 2013-04-24 | 浙江嘉化集团股份有限公司 | Steam condensate residual heat recycling device of reboiler of rectification device |
| CN203724800U (en) * | 2014-03-10 | 2014-07-23 | 北京国电龙源环保工程有限公司 | Heat energy regulating and controlling system for analysis system |
| CN105749728B (en) * | 2014-12-16 | 2020-11-17 | 中国科学院上海高等研究院 | Method and apparatus for capturing carbon dioxide |
| CN106310881A (en) * | 2016-10-26 | 2017-01-11 | 成都华西堂环保科技有限公司 | Regenerable cyclic absorption flue gas desulfurization technology |
| CN106362550A (en) * | 2016-11-11 | 2017-02-01 | 北京鼐宝隆能源科技有限公司 | Claus tail gas treatment process and device |
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Denomination of invention: An ionic liquid heating regeneration device Effective date of registration: 20211129 Granted publication date: 20201229 Pledgee: China Construction Bank Corporation Fangchenggang branch Pledgor: GUANGXI JINCHUAN NON-FERROUS METALS CO.,LTD. Registration number: Y2021450000052 |
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Date of cancellation: 20220607 Granted publication date: 20201229 Pledgee: China Construction Bank Corporation Fangchenggang branch Pledgor: GUANGXI JINCHUAN NON-FERROUS METALS CO.,LTD. Registration number: Y2021450000052 |