CN208911769U - It reduces methanol and washes I sections of CO2 flash column and I sections of pressure apparatus of H2S concentration tower - Google Patents
It reduces methanol and washes I sections of CO2 flash column and I sections of pressure apparatus of H2S concentration tower Download PDFInfo
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- CN208911769U CN208911769U CN201821569348.2U CN201821569348U CN208911769U CN 208911769 U CN208911769 U CN 208911769U CN 201821569348 U CN201821569348 U CN 201821569348U CN 208911769 U CN208911769 U CN 208911769U
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
It reduces methanol and washes I sections of CO2 flash column and I sections of pressure apparatus of H2S concentration tower.Low-temp methanol, which is washed, can effectively remove sour gas, and available gas flash distillation amount is excessive, and compressor and absorbing liquid pump reach maximum power and cannot still recycle, and lead to CO2I sections of flash column and H2The pressure that I sections of S concentration tower is higher by design pressure.The utility model composition includes: CO2 flash column (2), H2S concentration tower (4), CO2 flash column side respectively with semi lean solution feed pump (1), compressor A(13) connect, semi lean solution feed pump discharge is connect with regulating valve A(3) entrance, the outlet regulating valve A is connect with re-absorption liquid pipe line I(9), reabsorb liquid pipe line I and re-absorption liquid pipe line II(8) it is connect by valve, reabsorb liquid pipe line II and pass through pipeline and regulating valve B(6) connection is exported, regulating valve B entrance passes through pipeline and hot recycling tower feed pump (5) outlet connection.The utility model washes I sections of CO2 flash column and I sections of pressure apparatus of H2S concentration tower for reducing methanol.
Description
Technical field:
The utility model relates to a kind of reduction methanol to wash I sections of CO2 flash column and I sections of pressure apparatus of H2S concentration tower.
Background technique:
Although low-temp methanol, which is washed, at present can effectively remove acid gas components CO2、 H2The impurity such as S, but work as available gas
When flash distillation amount is excessive, compressor and absorbing liquid pump reach maximum power still and have mass efficient gas that cannot be recovered, and lead to CO2Flash distillation
I sections of tower and H2The pressure that I sections of S concentration tower is higher by design pressure, and available gas loss obviously increases.Low-temp methanol wash be it is a kind of at
Ripe reliable gas purifying technique, with operating flexibility, big, absorbability is greatly, selectivity is good, gas purification degree is high, operating cost
Low technological merit, especially suitable in Modern Coal-based Chemical, petrochemical industry, low-temp methanol, which is washed, can effectively remove sour gas
Body component CO2, H2S, COS and other impurities mainly utilize the difference of solubility of each substance in methanol, main
Gas solubility size in methyl alcohol: H2S > CO2 > CO > H2 > CH4, and this selection performance is conducive to obtain no sulphur
Gas, the gas of qualified is sent to downstream unit after purification.It participates in the methanol rich solution after absorbing and passes through carbon dioxide flash column
The means such as vacuum flashing, nitrogen air lift and hot recycling with hydrogen sulphide concentration tower regenerate methanol, and in vacuum flashing
A large amount of available gas CO, H2 and the CH4 flashed off in journey, this portion gas will be recycled, prevent available gas from losing, subtract
Few system energy consumption；
The unstripped gas come from upstream workshop section enters low temperature washing device for methanol, reaches after first passing around the cooling of level Four refrigerated separation
To index request, into desulfurizing tower, desulfurizing tower is divided into two sections: prewashing section and master wash section；In prewashing section, the removing of recycle methanol liquid is thick
Moisture content, benzene mixed, part organic sulfur, high-molecular compound in coal gas etc. prevent this partial impurities from entering desulfurizing tower master and wash section
Main methanol of washing is caused to pollute, it is ensured that Mathanol regenerating quality.Raw gas enters desulfurizing tower master and washes section, deviates from the H2S in raw gas, in advance
It washes methanol and enters the progress of hydrogen sulphide concentration tower vacuum flashing and air lift step by step after absorbing, carry out Mathanol regenerating, hydrogen sulfide
I sections of concentration tower is primarily to vacuum flashing goes out available gas CO, H2 and CH4 is recycled；
Gas enters decarbonizing tower after desulfurizing tower washing desulphurization, and the CO2 satisfaction in recycle methanol washing removing gas refers to
Mark is sent after requiring to downstream section；In decarbonizing tower the methanol rich solution of absorbing carbon dioxide enter I sections of carbon dioxide flash column into
Row vacuum flashing flashes off available gas CO, H2, CH4 available gas and is recycled.
I sections of carbon dioxide flash column and I sections of available gas flashed off of hydrogen sulphide concentration tower are added by reciprocating compressor
Be back in system after pressure, according to Henry's law, I sections of carbon dioxide flash column and I sections of hydrogen sulphide concentration tower of pressure it is more low more
The flash distillation for facilitating available gas in liquid, H2S and CO2 accounting is larger in the gas flashed off, to guarantee available gas
Content, using the big principle of the solubility of H2S and CO2 ratio CO, H2 and CH4 in methyl alcohol, increase methanol absorption liquid to H2S and
CO2 is absorbed again, reduces H2S and CO2 in flash gas to obtain more CO, H2 and CH4, but reabsorb feed
Pump power liquid outlet quantity is limited, and when available gas amount flash distillation amount is excessive, reciprocating compressor reaches and cyclic absorption liquid pump reaches maximum
Still there is mass efficient gas that cannot be recovered when power, leads to I sections and I sections of hydrogen sulphide concentration tower of carbon dioxide flash column of pressure
It is higher by design 0.2Mpa in 1.3Mpa, available gas loss obviously increases.
Utility model content:
The purpose of the utility model is to provide a kind of reduction low-temp methanols to wash I sections and I sections of H2S concentration tower pressures of CO2 flash column
Power device, is transformed using existing equipment, reaches optimization structure, the low consumed purpose of drop.
Above-mentioned purpose is realized by following technical scheme:
A kind of reduction methanol washes I sections of CO2 flash column and I section pressure apparatus of H2S concentration tower, and composition includes: that CO2 is flashed
Tower, H2S concentration tower, the CO2 flash column side are connect with semi lean solution feed pump, compressor A respectively, and the semi lean solution is given
Material pump discharge is connect by pipeline with the entrance of regulating valve A, and the outlet of the regulating valve A by pipeline and reabsorbs liquid pipe line
I connection, the re-absorption liquid pipe line I are connect with re-absorption liquid pipe line II by valve, and the re-absorption liquid pipe line II is logical
It crosses pipeline to connect with the outlet of regulating valve B, the entrance of the regulating valve B is connected by the outlet of pipeline and hot recycling tower feed pump
It connects.
The reduction methanol washes I sections of CO2 flash column and I sections of pressure apparatus of H2S concentration tower, the CO2 flash column point
Not Ju You I sections, II sections, III sections, the CO2 flash column other side with reabsorb liquid feed pump connect, the re-absorption liquid
Feed pump respectively the position between the re-absorption liquid pipe line I and the re-absorption liquid pipe line II connect, the H2S it is dense
The connection of contracting tower, the section bottom I of the CO2 flash column pass through piping connection, the I section of the CO2 flash column with II sections of sides
Side connection is equipped with the pipeline of CO2 methanol rich solution.
The reduction methanol washes I sections of CO2 flash column and I sections of pressure apparatus of H2S concentration tower, the H2S concentration tower point
Not Ju You I sections, II sections, III sections, the H2S concentration tower side connect with compressor B, the III section of the H2S concentration tower
Bottom is connect with the entrance of the hot recycling tower feed pump, and the section bottom I and II sections of sides of the H2S concentration tower pass through pipe
Road connection, the section side the I connection of the H2S concentration tower are equipped with the pipeline of H2S methanol rich solution.
The utility model has the advantages that
1. the utility model, which provides a kind of reduction low-temp methanol, to be washed I section pressure of I sections of CO2 flash column and H2S concentration tower and fills
It sets, which is mainly transformed using existing equipment, reaches optimization structure, the low consumed purpose of drop, while solving two
I sections of carbonoxide flash column and I section hypertonia of hydrogen sulphide concentration tower solve re-absorption methanol liquid measure deficiency and cause in effective gas
H2S and CO2 too high levels, available gas volume increase the problem of system pressure increases.
2. the utility model is transformed conducive to existing equipment, reconstruction structure from decarbonizing tower semi lean solution specifically, be fed
Pump discharge increases on the re-absorption liquid pipe line I of a root canal line and regulating valve A to I sections of carbon dioxide flash column, which can increase
Add I sections of carbon dioxide flash column of re-absorption liquid measure；Increase a root canal line and regulating valve B to sulphur from hot recycling tower feed pump discharge
Change on I sections of hydrogen concentration tower of re-absorption liquid pipe line II, the re-absorption liquid measure that can increase I sections of hydrogen sulphide concentration tower of the structure.
3. the utility model increases the load capacity that can increase low temperature washing device for methanol after this two pipelines and regulating valve,
After at full capacity, it can be increased by this two pipelines and regulating valve and reabsorb liquid measure, prevent I sections of CO2 flash column and H2S concentration tower
I sections of hypertonia lead to effective gas recycling compressor superpressure emptying；In course of normal operation, I sections of CO2 flash column and H2S are reduced
I sections of pressure of concentration tower are conducive to the gas flash distillation in methanol, guarantee the reproduction quality of methanol and increase the recycling of available gas
Amount reduces available gas loss, reduces the energy consumption of low temperature washing device for methanol.
Detailed description of the invention:
Attached drawing 1 is the structural schematic diagram of the utility model.
Specific embodiment:
Embodiment 1:
A kind of reduction methanol washes I sections of CO2 flash column and I section pressure apparatus of H2S concentration tower, and forming includes: CO2 flash column
2, H2S concentration tower 4, the CO2 flash column side are connect with semi lean solution feed pump 1, compressor A13 respectively, and described half is poor
Liquid feed pump discharge is connect by pipeline with the entrance of regulating valve A3, and the outlet of the regulating valve A by pipeline and reabsorbs
The I9 connection of liquid pipe line, the re-absorption liquid pipe line I are connect with re-absorption liquid pipe line II8 by valve, the re-absorption liquid
Pipeline II is connect by pipeline with the outlet of regulating valve B6, and the entrance of the regulating valve B is fed by pipeline and hot recycling tower
The outlet connection of pump 5.
Embodiment 2:
I sections of CO2 flash column and I sections of pressure apparatus of H2S concentration tower are washed according to drop low-temp methanol described in embodiment 1, it is described
CO2 flash column be respectively provided with I sections, II sections, III sections, the CO2 flash column other side and reabsorb liquid feed pump 11 and connect
It connects, the re-absorption liquid feed pump meta position with the re-absorption liquid pipe line I and the re-absorption liquid pipe line II respectively
Connection, the H2S concentration tower connection are set, the section bottom I of the CO2 flash column passes through piping connection, institute with II sections of sides
The section side the I connection for the CO2 flash column stated is equipped with the pipeline 12 of CO2 methanol rich solution.
Embodiment 3:
The reduction methanol according to embodiment 1 or 2 washes I sections of CO2 flash column and I sections of pressure apparatus of H2S concentration tower, described
H2S concentration tower be respectively provided with I sections, II sections, III sections, the H2S concentration tower side is connect with compressor B10, described
The section bottom III of H2S concentration tower is connect with the entrance of the hot recycling tower feed pump, the I section bottom of the H2S concentration tower
With II sections of sides by piping connection, the section side the I connection of the H2S concentration tower is equipped with the pipeline 7 of H2S methanol rich solution.
Embodiment 4:
I sections of CO2 flash column and I sections of pressure apparatus of H2S concentration tower are washed according to drop low-temp methanol described in embodiment 1 or 2 or 3
Newly-increased pipeline illustrate: semi lean solution feed pump operate normally when flow 350m3/h, 480 m3/h of maximum stream flow, outlet pressure
4.2Mpa；Flow 370m3/h when hot recycling tower feed pump operates normally, 526 m3/h of maximum stream flow, outlet pressure 3.0
Mpa；Flow 208m3/h, maximum stream flow 251m3/h, 1.8 Mpa of outlet pressure when liquid feed pump operates normally are reabsorbed, partly
The operating pressure and flow of lean solution feed pump and hot recycling tower feed pump more, semi lean solution feed all higher than re-absorption liquid feed pump
Pump and two root canal line of hot recycling tower feed pump are all that the methanol semi lean solution after vacuum flashing and air lift has certain absorption
Ability, but all without being regenerated by thorough, so larger at phase-splitting difference contained by two strands of methanol semi lean solutions, it is not possible to be mixed
It connects, can only be one-to-one relationship；
Specific embodiment are as follows:
After low temperature washing device for methanol operates normally, system loading is gradually increased, is fed pump operation to completely negative when reabsorbing liquid
When lotus, judged whether according to the constituent analysis of I sections and I sections of hydrogen sulphide concentration tower of pressure and available gas of carbon dioxide flash column
Need to open the valve of newly-increased pipeline；
CO2 too high levels when I sections of pressure of carbon dioxide flash column are higher by design pressure 1.1Mpa, in available gas
When, semi lean solution feed pump is gradually opened to I sections of newly-increased pipeline valves of carbon dioxide flash column, increase reabsorbs the flow of liquid, by
It gradually reduces I sections of carbon dioxide flash column of pressure and increases the ingredient of this section of available gas；
When I sections of pressure of hydrogen sulphide concentration tower are higher by design pressure 1.1Mpa, when CO2 too high levels in available gas,
Hot recycling tower feed pump is gradually opened to I sections of newly-increased pipeline valves of hydrogen sulphide concentration tower, increases the flow for reabsorbing liquid, gradually drops
The ingredient for this section of available gas of pressure and increase that I sections of low in hydrogen sulphide concentration tower.
Claims (3)
1. a kind of reduction methanol washes I sections of CO2 flash column and I section pressure apparatus of H2S concentration tower, form include: CO2 flash column,
H2S concentration tower, it is characterized in that: the CO2 flash column side is connect with semi lean solution feed pump, compressor A respectively, described half
Lean solution feed pump discharge is connect by pipeline with the entrance of regulating valve A, and the outlet of the regulating valve A by pipeline and reabsorbs
The I connection of liquid pipe line, the re-absorption liquid pipe line I are connect with re-absorption liquid pipe line II by valve, the re-absorption liquid pipe
Line II is connect by pipeline with the outlet of regulating valve B, and the entrance of the regulating valve B passes through pipeline and hot recycling tower feed pump
Outlet connection.
2. reduction methanol according to claim 1 washes I sections of CO2 flash column and I sections of pressure apparatus of H2S concentration tower, feature
Be: the CO2 flash column is respectively provided with I sections, II sections, III sections, the CO2 flash column other side and re-absorption liquid feed
Pump connection, the re-absorption liquid feed pump respectively with the re-absorption liquid pipe line I and re-absorption liquid pipe line II it
Between position connection, the connection of the described H2S concentration tower, the section bottom I of the CO2 flash column passes through pipeline company with II sections of sides
It connects, the section side the I connection of the CO2 flash column is equipped with the pipeline of CO2 methanol rich solution.
3. reduction methanol according to claim 1 washes I sections of CO2 flash column and I sections of pressure apparatus of H2S concentration tower, feature
Be: the H2S concentration tower is respectively provided with I sections, II sections, III sections, and the H2S concentration tower side is connect with compressor B, institute
The section bottom III for the H2S concentration tower stated is connect with the entrance of the hot recycling tower feed pump, the I section of the H2S concentration tower
With II sections of sides by piping connection, the section side the I connection of the H2S concentration tower is equipped with the pipeline of H2S methanol rich solution for bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821569348.2U CN208911769U (en) | 2018-09-26 | 2018-09-26 | It reduces methanol and washes I sections of CO2 flash column and I sections of pressure apparatus of H2S concentration tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821569348.2U CN208911769U (en) | 2018-09-26 | 2018-09-26 | It reduces methanol and washes I sections of CO2 flash column and I sections of pressure apparatus of H2S concentration tower |
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| Publication Number | Publication Date |
|---|---|
| CN208911769U true CN208911769U (en) | 2019-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821569348.2U Active CN208911769U (en) | 2018-09-26 | 2018-09-26 | It reduces methanol and washes I sections of CO2 flash column and I sections of pressure apparatus of H2S concentration tower |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022000735A1 (en) * | 2020-06-30 | 2022-01-06 | 大连佳纯气体净化技术开发有限公司 | Washing rich solution co2 desorption device and method for low-temperature methanol washing |
-
2018
- 2018-09-26 CN CN201821569348.2U patent/CN208911769U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022000735A1 (en) * | 2020-06-30 | 2022-01-06 | 大连佳纯气体净化技术开发有限公司 | Washing rich solution co2 desorption device and method for low-temperature methanol washing |
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