CN203469766U - Deeply-desorbing and cold energy regenerating device for low-temperature methanol washing process - Google Patents
Deeply-desorbing and cold energy regenerating device for low-temperature methanol washing process Download PDFInfo
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- CN203469766U CN203469766U CN201320543665.8U CN201320543665U CN203469766U CN 203469766 U CN203469766 U CN 203469766U CN 201320543665 U CN201320543665 U CN 201320543665U CN 203469766 U CN203469766 U CN 203469766U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model provides a deeply-desorbing and cold energy regenerating device for a low-temperature methanol washing process. The device comprises a hydrogen sulfide concentrating tower, wherein the liquid outlet of the hydrogen sulfide concentrating tower is communicated with a liquid inlet in the top end of a gas stripping tower, an air inlet in the bottom end of the gas stripping tower is communicated with a nitrogen pipe, and the liquid outlet of the gas stripping tower is connected to the liquid inlet of a thermal regeneration tower. The device has the advantages that a methanol-rich solution is completely regenerated through the gas stripping principle of the gas stripping tower and the thermal regeneration principle of the thermal regeneration tower so as to achieve the purpose of cyclic utilization; meanwhile, a three-stage heat exchanger is used for heat exchange, the regeneration capacity of the low-temperature methanol wash is improved, cold energy contained in low-temperature methanol wash rich methanol is recycled, the cold energy obtained through the self resolution of the methanol solution is used to the maximum degree for achieving the purpose of removing acidic gases, an external cold source is saved, the consumption of liquid nitrogen is reduced, the stable operation of the device is ensured, and the device is energy-saving and environment-friendly.
Description
Technical field
The utility model relates to low-temperature rectisol technical field, is specifically related to a kind of device of low-temperature rectisol deep analysis regeneration cold.
Background technology
In the Chemical Manufacture that the coal of take is raw material, in crude synthesis gas, contain the CO of great quantities of spare
2, a small amount of H
2the sour gas such as S, COS, these sour gas are disadvantageous to producing, sulfide wherein can cause the catalyst poisoning in the production of downstream, must be removed and reclaim.Therefore current large-scale Coal Chemical Industry ammonia synthesis process flow process processed is substantially all used low-temp methanol washing process the sour gas in synthesis gas is removed away.It is lyosoption that low-temp methanol washing process utilizes-64 ℃ of left and right poor methanol solution, utilizes methyl alcohol at low temperatures to CO
2, H
2the great good characteristic of the sour gas such as S, COS solubility, removes the sour gas in unstripped gas, and the rich methanol regeneration of waste liquor that has made to absorb foreign gas by methods such as decompression, air lift, heating completely, recycle.And the CO parsing
2, H
2the emptying of the foreign gas such as S and COS and part high-purity CO
2send production urea system.
In rectisol system, a cold part for methyl alcohol is to resolve refrigeration acquisition by having absorbed the rich methanol regeneration of waste liquor of sour gas; Another is most of by the outer low-temperature receiver compensation keeping system cold balancing that supplies, and outer is mainly to compensate by ammonia cooler for low-temperature receiver.Liquefied ammonia utilizes ice maker to make, this need to consume a large amount of energy, form larger waste, for meeting reduction energy consumption, the theory of energy-saving and emission-reduction, how to reduce the consumption of liquefied ammonia, utilizing to greatest extent and self resolving the cold making is a technical barrier that needs solution in current actual production process.
Utility model content
For overcoming the deficiencies in the prior art, the utility model discloses a kind of device of low-temperature rectisol deep analysis regeneration cold.
A kind of device of low-temperature rectisol deep analysis regeneration cold, comprise hydrogen sulfide concentration tower, the liquid outlet of described hydrogen sulfide concentration tower is communicated with the top inlet of stripping tower, and the bottom air inlet of described stripping tower is communicated with nitrogen tube, and the liquid outlet of stripping tower is connected with the inlet of hot regenerator.
Further, the liquid outlet of described hydrogen sulfide concentration tower is connected with the top inlet of stripping tower by compression pump, filter, First Heat Exchanger, the second heat exchanger successively.
Further, the liquid outlet of described stripping tower is connected with the inlet of hot regenerator by delivery pump, the 3rd heat exchanger.
Further, the top of described stripping tower is provided with blast pipe.The tail gas emptying house steward that the sour gas parsing through deep regenerative and air lift nitrogen mixture are delivered to low temperature washing device for methanol through blast pipe unifies discharge.
Further, the bottom liquid outlet of described hot regenerator is connected with First Heat Exchanger by the 3rd heat exchanger, the second heat exchanger successively.
This device is from washing the CO that is dissolved with of hydrogen sulfide concentration tower bottom liquid outlet output
2, H
2the rich methanol solution of the sour gas such as S, COS, compressed pump pressure contracting, filter filter out after impurity, by the heat exchange of First Heat Exchanger and the second heat exchanger, reduce the temperature of rich methanol solution, then send in stripping tower, the bottom of stripping tower is communicated with nitrogen tube, pass into nitrogen, nitrogen rises to tower top at the bottom of tower, with mobile from top to bottom rich methanol solution, two phase countercurrent flow contact, utilizes air lift nitrogen to reduce sour gas specific pressure in gas phase component, and then the sour gas absorbing in deep analysis rich methanol solution, and obtain the cold that it contains; And the sour gas parsing through deep regenerative and the gaseous mixture of air lift nitrogen are delivered to tail gas emptying in device through blast pipe.Methanol solution after parsing through sending delivery pump and the 3rd heat exchanger to deliver to the regeneration of carrying out terminal stage in hot regenerator, is emitted CO again
2, H
2the sour gas such as S, COS, makes the poor methanol of reusable edible.Poor methanol by the 3rd heat exchanger, the second heat exchanger and First Heat Exchanger classification heat exchange, makes the temperature of poor methanol reach minimum as far as possible, make its recycling in this device for CO
2, H
2the absorbent of the sour gas such as S, COS.
In the utility model, stripping tower is by the solute component (CO in liquid phase (rich methanol)
2, H
2the sour gas such as S, COS) the mass transfer separation process of shifting to the gas phase (nitrogen) contacting with it.So the air lift principle of utilizing the utility model causes the solute balance dividing potential drop in liquid phase to be greater than the mass transfer condition of its gaseous phase partial pressure, impels solute to free rapidly from liquid phase.And due at rich methanol solution after compression through porous plug (choke valve) to lower pressure direction adiabatic expansion, in carrying out throttling expansion process, solution temperature constantly reduces, and system obtains cold.
The utility model utilizes nitrogen as strippant, passes in stripping tower from bottom to up, and treats that the rich methanol solution of desorb flows from top to bottom, and two phase countercurrent flow contact, makes its desorb carry out obtaining quite complete.From obtaining the methanol solution of regeneration at the bottom of stripping tower tower, by delivery pump, send into further regeneration in hot regenerator, from stripper overhead, draw resolution gas and carry out emptying.
In the utility model, utilize three grades of heat exchangers to carry out heat exchange, reduced the temperature of methanol solution, improved the ability that it dissolves sour gas.
The device of low-temperature rectisol deep analysis regeneration cold of the present utility model, by the air lift principle of stripping tower and the hot regeneration principle of hot regenerator, carries out holomorphosis to rich methanol solution, by the CO wherein adsorbing
2, H
2the sour gas such as S, COS is resolved and is discharged, and reaches the object recycling.Thereby improve low-temperature rectisol power of regeneration, recycled the cold containing in low-temperature rectisol rich methanol, thereby obtained more colds, saved the outer low-temperature receiver that supplies, reduced the consumption of liquefied ammonia, assurance device stable operation, and meet energy-conserving and environment-protective theory.Utilize to greatest extent and self resolve the object that the cold making reaches removal sour gas.
Accompanying drawing explanation
Fig. 1 is apparatus structure schematic diagram of the present utility model.
In figure: 1-hydrogen sulfide concentration tower, 2-compression pump, 3-filter, 4-First Heat Exchanger, 5-the second heat exchanger, 6-stripping tower, 7-delivery pump, 8-the 3rd heat exchanger, the hot regenerator of 9-, 10-nitrogen tube, 11-blast pipe.
The specific embodiment
As shown in Figure 1, a kind of device of low-temperature rectisol deep analysis regeneration cold, comprise hydrogen sulfide concentration tower 1, the liquid outlet of hydrogen sulfide concentration tower 1 is connected with the top inlet of stripping tower 6 by compression pump 2, filter 3, First Heat Exchanger 4, the second heat exchanger 5 successively; The bottom air inlet of stripping tower 6 is communicated with nitrogen tube 10, and the liquid outlet of stripping tower 6 is connected with the inlet of hot regenerator 9 by delivery pump 7, the 3rd heat exchanger 8.
Further, the top of described stripping tower 6 is provided with blast pipe 11, and the tail gas emptying house steward that the sour gas parsing through deep regenerative and air lift nitrogen mixture are delivered to low temperature washing device for methanol through blast pipe unifies discharge.
Further, the bottom liquid outlet of described hot regenerator 9 is connected with First Heat Exchanger 4 by the 3rd heat exchanger 8, the second heat exchanger 5 successively, make the poor methanol solution fractionation heat exchange of regeneration, make its temperature reach minimum as far as possible, make its recycling in this device for CO
2, H
2the absorbent of the sour gas such as S, COS.
From washing the CO that is dissolved with of hydrogen sulfide concentration tower bottom liquid outlet output
2, H
2the rich methanol solution of the sour gas such as S, COS, compressed pump pressure contracting, filter filter out after impurity, again by the heat exchange of First Heat Exchanger and the second heat exchanger, reduce the temperature of rich methanol solution, then send in stripping tower, the bottom of stripping tower is communicated with nitrogen tube, pass into nitrogen, nitrogen rises to tower top at the bottom of tower, with mobile from top to bottom rich methanol solution, two phase countercurrent flow contact, utilizes air lift nitrogen to reduce sour gas specific pressure in gas phase component, and then the sour gas absorbing in deep analysis rich methanol solution, and obtain the cold that it contains; And the sour gas parsing through deep regenerative and the gaseous mixture of air lift nitrogen are delivered to tail gas emptying in device through blast pipe.Methanol solution after parsing through sending delivery pump and the 3rd heat exchanger to deliver to the regeneration of carrying out terminal stage in hot regenerator, is emitted CO again
2, H
2the sour gas such as S, COS, makes the poor methanol of reusable edible.Poor methanol by the 3rd heat exchanger, the second heat exchanger and First Heat Exchanger classification heat exchange, makes the temperature of poor methanol reach minimum as far as possible, make its recycling in this device for CO
2, H
2the absorbent of the sour gas such as S, COS.
The above-mentioned description to embodiment is can understand and apply the utility model for ease of those skilled in the art.Person skilled in the art obviously can easily make various modifications to these embodiment, and General Principle described herein is applied in other embodiment and needn't passes through performing creative labour.Therefore, the utility model is not limited to the embodiment here, and those skilled in the art are according to announcement of the present utility model, and not departing from the improvement that the utility model category makes and revise all should be within protection domain of the present utility model.
Claims (5)
1. the device of low-temperature rectisol deep analysis regeneration cold, comprise hydrogen sulfide concentration tower (1), it is characterized in that: the liquid outlet of described hydrogen sulfide concentration tower (1) is communicated with the top inlet of stripping tower (6), the bottom air inlet of described stripping tower (6) is communicated with nitrogen tube (10), and the liquid outlet of stripping tower (6) is connected with the inlet of hot regenerator (9).
2. the device of low-temperature rectisol deep analysis regeneration cold according to claim 1, is characterized in that: the liquid outlet of described hydrogen sulfide concentration tower (1) is connected with the top inlet of stripping tower (6) by compression pump (2), filter (3), First Heat Exchanger (4), the second heat exchanger (5) successively.
3. the device of low-temperature rectisol deep analysis regeneration cold according to claim 1, is characterized in that: the liquid outlet of described stripping tower (6) is connected with the inlet of hot regenerator (9) by delivery pump (7), the 3rd heat exchanger (8).
4. the device of low-temperature rectisol deep analysis regeneration cold according to claim 1, is characterized in that: the top of described stripping tower (6) is provided with blast pipe (11).
5. the device of low-temperature rectisol deep analysis regeneration cold according to claim 1, is characterized in that: the bottom liquid outlet of described hot regenerator (9) is connected with First Heat Exchanger (4) by the 3rd heat exchanger (8), the second heat exchanger (5) successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320543665.8U CN203469766U (en) | 2013-09-03 | 2013-09-03 | Deeply-desorbing and cold energy regenerating device for low-temperature methanol washing process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320543665.8U CN203469766U (en) | 2013-09-03 | 2013-09-03 | Deeply-desorbing and cold energy regenerating device for low-temperature methanol washing process |
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| Publication Number | Publication Date |
|---|---|
| CN203469766U true CN203469766U (en) | 2014-03-12 |
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|---|---|---|---|
| CN201320543665.8U Expired - Fee Related CN203469766U (en) | 2013-09-03 | 2013-09-03 | Deeply-desorbing and cold energy regenerating device for low-temperature methanol washing process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105779026A (en) * | 2016-03-11 | 2016-07-20 | 神华集团有限责任公司 | Methanol washing system |
| CN107138025A (en) * | 2017-05-31 | 2017-09-08 | 华南理工大学 | The low-temp methanol washing process that a kind of pressure energy and cold energy high efficiente callback are utilized |
| CN113532191A (en) * | 2021-07-22 | 2021-10-22 | 华亭煤业集团有限责任公司 | Optimized heat exchange network of low-temperature methanol washing system |
-
2013
- 2013-09-03 CN CN201320543665.8U patent/CN203469766U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105779026A (en) * | 2016-03-11 | 2016-07-20 | 神华集团有限责任公司 | Methanol washing system |
| CN105779026B (en) * | 2016-03-11 | 2019-04-09 | 神华集团有限责任公司 | Methanol washes system |
| CN107138025A (en) * | 2017-05-31 | 2017-09-08 | 华南理工大学 | The low-temp methanol washing process that a kind of pressure energy and cold energy high efficiente callback are utilized |
| CN107138025B (en) * | 2017-05-31 | 2020-05-22 | 华南理工大学 | Low-temperature methanol washing process for efficiently recycling pressure energy and cold energy |
| CN113532191A (en) * | 2021-07-22 | 2021-10-22 | 华亭煤业集团有限责任公司 | Optimized heat exchange network of low-temperature methanol washing system |
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Granted publication date: 20140312 Termination date: 20160903 |