CN210584351U - Be used for gaseous decarbonization device - Google Patents
Be used for gaseous decarbonization device Download PDFInfo
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- CN210584351U CN210584351U CN201921169410.3U CN201921169410U CN210584351U CN 210584351 U CN210584351 U CN 210584351U CN 201921169410 U CN201921169410 U CN 201921169410U CN 210584351 U CN210584351 U CN 210584351U
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Abstract
The utility model discloses a be used for gaseous decarbonization device, including decarbonization tower, liquid filter, flash tank and analytic tower, the decarbonization tower is bilayer structure, is equipped with inner chamber and exocoel, and the exocoel opening part is provided with the filter layer, the decarbonization tower is provided with blast pipe, feed liquor pipe, intake pipe, fluid-discharge tube and flowing back funnel. The utility model provides a decarbonization device can be fine the control system in the content of decarbonization liquid impurity, guarantee that the impurity volume in the decarbonization liquid that is in the circulation state accords with the production requirement, avoided because of the decarbonization tower distributor jam scheduling problem that the impurity gathering arouses.
Description
Technical Field
The utility model relates to a gas separation technical field especially relates to a be used for gaseous decarbonization device.
Background
Synthetic ammonia is a traditional chemical industry, and is one of the most basic chemical products worldwide, mainly used for manufacturing nitric acid, chemical fertilizers and the like. The production process of synthetic ammonia generally comprises three main steps of gas making, purification, compression and synthesis, and the production process flow comprises the following steps: the process comprises eight procedures of desulfurization, conversion, transformation, decarburization, methanation, synthesis of ammonia, absorption refrigeration, input into an ammonia storage and ammonia absorption.
Regardless of the raw materials and the method for gas production, the converted synthesis gas contains a large amount of carbon dioxide, and if the carbon dioxide is not removed before the synthesis process, the carbon dioxide not only consumes gas compression work and occupies the volume of equipment, but also is harmful to the subsequent processes. In addition, carbon dioxide is an important chemical raw material, and carbon dioxide is required to be used as a main raw material for synthesizing urea. Therefore, in the production of synthetic ammonia, the process of removing carbon dioxide in the process gas is called decarbonization, and in the fertilizer device for the coproduction of synthetic ammonia and urea, the process has two purposes of purifying gas and recovering pure carbon dioxide.
The propylene carbonate decarbonization is a physical decarbonization method, and has the advantages of simple process flow, low operating cost, no heat energy consumption for regeneration and the like, and the main process of the propylene carbonate decarbonization process is as follows: and (3) absorbing carbon dioxide in the converted gas and propylene carbonate solution in a reverse direction in a decarbonizing tower, introducing the purified gas into a methanation process, desorbing the carbon dioxide gas from the solution after absorbing the carbon dioxide through a flash tank and an analytical tower, regenerating the solution, pumping the solution into the decarbonizing tower through a decarbonizing pump, and continuously circulating the steps.
In the production process, along with the extension of the operation time of the ammonia synthesis device, the decarbonization liquid propylene carbonate becomes more and more dirty, a distributor of a decarbonization tower can be blocked, the pressure difference of the decarbonization tower rises, the energy consumption of a system is increased, and the decarbonization tower needs to be stopped after the system is seriously stopped. Impurities in the decarburization solution mainly comprise two parts, wherein one part is elemental sulfur, and elemental sulfur is formed with dissolved oxygen in the decarburization process due to hydrogen sulfide contained in the shift gas; the other part is impurities generated by corrosion of the equipment, the pipeline and the like of the decarburization device. The existing decarbonization device is provided with a filter for filtering impurities in decarbonization liquid, but because the filtering capacity of the filter is limited, the amount of the decarbonization liquid is too large, the time for completely filtering the decarbonization liquid once is too long, and the content of the impurities in the decarbonization liquid cannot be quickly reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects existing in the prior art and providing a device for gas decarburization.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an apparatus for decarbonizing gases, characterized in that: the system comprises a decarbonization tower, a liquid filter, a flash tank and an analysis tower, wherein the decarbonization tower is connected with a liquid discharge pipe, the liquid discharge pipe is connected with the flash tank, the liquid discharge pipe is connected with a second valve, the flash tank is connected with the analysis tower, the decarbonization tower is connected with a liquid inlet pipe, the liquid inlet pipe is connected with the analysis tower, and the liquid inlet pipe is connected with a delivery pump;
the decarbonization tower is connected with a liquid discharge funnel, the liquid discharge funnel is connected with a liquid filter, the liquid filter is connected with the flash tank, and the liquid discharge funnel is connected with a first valve;
the decarbonizing tower is provided with an outer barrel body, a liquid discharge funnel is arranged at an opening of the outer barrel body, an inner barrel body is arranged in the outer barrel body, the outer barrel body and the inner barrel body are coaxially arranged, an outer cavity is formed between the outer barrel body and the inner barrel body, an annular filter layer is arranged at an opening of the outer cavity, and the inner barrel body surrounds to form the inner cavity;
the decarbonizing tower is provided with an air inlet pipe and an air outlet pipe, the air inlet pipe is positioned at the lower part of the decarbonizing tower, the air outlet pipe is positioned at the upper part of the decarbonizing tower, and the air inlet pipe and the air outlet pipe are both opened in the inner cavity;
the decarbonizing tower is provided with a liquid inlet pipe and a liquid outlet pipe, the liquid inlet pipe is positioned at the upper part of the decarbonizing tower, the outlet of the liquid inlet pipe is positioned in the inner cavity, the liquid outlet pipe is positioned at the lower part of the decarbonizing tower, and the inlet of the liquid outlet pipe is positioned in the outer cavity;
and the upper part of the decarbonization tower is provided with a vent hole.
Preferably, the liquid discharge funnel is also connected with the flash tank, and the liquid discharge funnel is connected with a third valve.
Preferably, the device for decarbonizing gases further comprises a gas filter, and the gas filter is connected with the gas inlet pipe.
Preferably, the exhaust pipe is located on the central axis of the decarbonization tower.
Preferably, a liquid distributor is arranged in the inner cavity and connected with the liquid inlet pipe.
Preferably, a gas distributor is arranged in the inner cavity and connected with a gas inlet pipe.
The utility model has the advantages that: the utility model provides a be used for gaseous decarbonization device can be fine the control system in the content of decarbonization liquid impurity, guarantee that the impurity volume in the decarbonization liquid in the circulation state accords with the production requirement, avoided because of the problem such as decarbonization tower distributor jam that impurity gathers causes; the impurity is removed by matching the filter layer, the liquid filter and the valve, so that the time consumption for removing the impurity is less, and the circulation period of the decarbonizing liquid is shortened.
Drawings
FIG. 1 is a schematic view of a gas decarbonizing apparatus according to the present invention.
FIG. 2 is a schematic view showing the structure of a decarbonizing column used in a gas decarbonizing apparatus.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, the utility model provides a device for gas decarbonization, which is characterized in that: the system comprises a decarbonization tower 1, a liquid filter 2, a flash evaporation tank 3 and a desorption tower 4, wherein the decarbonization tower 1 is connected with a liquid discharge pipe 1.9, the liquid discharge pipe 1.9 is connected with the flash evaporation tank 3, a second valve 6 is connected on the liquid discharge pipe 1.9, the flash evaporation tank 3 is connected with the desorption tower 4 through a pipeline, the decarbonization tower 1 is connected with a liquid inlet pipe 1.6, the liquid inlet pipe 1.6 is connected with the desorption tower 4, and a delivery pump 9 is connected on the liquid inlet pipe 1.6;
the decarbonization tower 1 is connected with a liquid discharge funnel 1.8, the liquid discharge funnel 1.8 is connected with a liquid filter 2, the liquid filter 2 is connected with the flash tank 3 through a pipeline, and the liquid discharge funnel 1.8 is connected with a first valve 5;
the decarburization tower 1 is provided with an outer barrel body 1.1, a drainage funnel 1.8 is arranged at an opening of the outer barrel body 1.1, an inner barrel body 1.2 is arranged in the outer barrel body 1.1, the outer barrel body 1.1 and the inner barrel body 1.2 are coaxially arranged, an outer cavity 1.4 is formed between the outer barrel body 1.1 and the inner barrel body 1.2, an annular filter layer 1.11 is arranged at an opening of the outer cavity 1.4, and the inner barrel body 1.2 is surrounded to form an inner cavity 1.3;
an air inlet pipe 1.5 and an air outlet pipe 1.7 are arranged on the decarburization tower 1, the air inlet pipe 1.5 is positioned at the lower part of the decarburization tower 1, the air outlet pipe 1.7 is positioned at the upper part of the decarburization tower 1, and the air inlet pipe 1.5 and the air outlet pipe 1.7 are both opened in an inner cavity 1.3;
a liquid inlet pipe 1.6 and a liquid discharge pipe 1.9 are arranged on the decarburization tower 1, the liquid inlet pipe 1.6 is positioned at the upper part of the decarburization tower 1, the outlet of the liquid inlet pipe 1.6 is positioned in the inner cavity 1.3, the liquid discharge pipe 1.9 is positioned at the lower part of the decarburization tower 1, and the inlet of the liquid discharge pipe 1.9 is positioned in the outer cavity 1.4;
and the upper part of the decarbonization tower 1 is provided with a vent hole 1.10.
The utility model provides a when being used for the operation of gas decarbonization device, come from the transform gas of upstream process and get into the inner chamber 1.3 of decarbonization tower 1 from intake pipe 1.5, decarbonization liquid propylene carbonate solution gets into inner chamber 1.3 from feed liquor pipe 1.6, transform gas and decarbonization liquid absorb in inner chamber 1.3 in reverse direction, the purified gas leaves decarbonization tower 1 from blast pipe 1.7, get into the methanation process; the decarbonization liquid (rich liquid) absorbing carbon dioxide firstly enters a liquid discharge funnel 1.8 and then enters an outer cavity 1.4 through a filter layer 1.11; the first valve 5 is closed and the second valve 6 is opened and the rich liquid leaves the decarboniser 1 through a drain 1.9 opening into the outer chamber 1.4. In the process, impurities in the rich liquid are either adsorbed by the filter layer 1.11 or are left in the liquid discharge funnel 1.8, and the rich liquid which leaves the decarbonization tower 1 from the liquid discharge pipe 1.9 and enters the flash tank 3 is free of impurities. Desorbing carbon dioxide gas from the clean rich solution through a flash tank 3 and an analytical tower 4, regenerating the decarbonization solution, changing the rich solution into a barren solution, pumping the barren solution into a liquid inlet pipe 1.6 of the decarbonization tower 1 through a delivery pump 9, and circulating the steps.
In order to avoid the pressure in the outer cavity 1.4 from rising because rich liquid enters the outer cavity 1.4, the outer barrel body 1.1 is provided with a vent hole 1.10.
During the circulation, impurities in the rich liquid in the liquid discharge funnel 1.8 are gradually gathered at the outlet of the liquid discharge funnel 1.8 under the influence of gravity, at the moment, the second valve 6 is closed, the first valve 5 is opened, the rich liquid with the gathered impurities enters the liquid filter 2, and the rich liquid enters the flash evaporation tank 3 after being filtered and the impurities are removed. After the rich liquid with the accumulated impurities is discharged from the decarbonizing tower 1, the first valve 5 can be closed, and the second valve 6 can be opened, so that the rich liquid still enters the flash tank 3 from the liquid discharge pipe 1.9.
Preferably the filler in the filter layer 1.11 is PP cotton or activated carbon, preferably the liquid filter 7 is an XMY-800 filter.
The utility model provides a decarbonization liquid impurity content in the control system that is arranged in the gas decarbonization device can be fine, the relative pureness of rich liquid entering into the flash tank 3 is ensured constantly, the impurity amount in the decarbonization liquid in the circulation state meets the production requirement, the problems of decarbonization tower distributor blockage and the like caused by impurity aggregation are avoided; the filtering layer 1.11 is matched with the liquid filter 2 to remove impurities, so that the time consumption for removing the impurities is less, and the circulation period of the decarbonization liquid is shortened.
In order to further reduce the impurity content of the decarbonizing solution, preferably, the apparatus for decarbonizing gas further comprises a gas filter 8, and the gas filter 8 is connected with the gas inlet pipe 1.5 of the decarbonizing tower 1. The gas filter 8 is used for filtering hydrogen sulfide in the conversion gas and reducing the generation of monomer sulfur in the decarbonization liquid, and preferably, the gas filter 8 adopts an activated carbon filter element.
The liquid discharge funnel 1.8 is also connected with the flash tank 3, and the liquid discharge funnel 1.8 is connected with the third valve 7. When the pregnant solution in the flowing back funnel is comparatively pure, close first valve 5, second valve 6, open third valve 7, the pregnant solution directly gets into flash tank 3 from flowing back funnel 1.8, has reduced the filter capacity of filter layer 1.11 and liquid filter 7, has shortened the decarbonization liquid cycle.
In order to ensure the reverse adsorption effect of the decarbonization liquid and the conversion gas, a liquid distributor and a gas distributor are arranged in the inner cavity 1.3, the liquid distributor is connected with a liquid inlet pipe 1.6, and the gas distributor is connected with a gas inlet pipe 1.5.
The utility model discloses equipment such as flash drum 3, analytic tower 4, delivery pump 9, liquid distributor, gas distributor that relate to in are field prior art, do not give unnecessary details here.
Claims (6)
1. An apparatus for decarbonizing gases, characterized in that: the device comprises a decarbonization tower (1), a liquid filter (2), a flash evaporation tank (3) and a desorption tower (4), wherein the decarbonization tower (1) is connected with a liquid discharge pipe (1.9), the liquid discharge pipe (1.9) is connected with the flash evaporation tank (3), the liquid discharge pipe (1.9) is connected with a second valve (6), the flash evaporation tank (3) is connected with the desorption tower (4), the decarbonization tower (1) is connected with a liquid inlet pipe (1.6), the liquid inlet pipe (1.6) is connected with the desorption tower (4), and the liquid inlet pipe (1.6) is connected with a conveying pump (9);
the decarbonization tower (1) is connected with a liquid discharge funnel (1.8), the liquid discharge funnel (1.8) is connected with a liquid filter (2), the liquid filter (2) is connected with the flash tank (3), and the liquid discharge funnel (1.8) is connected with a first valve (5);
the decarbonization tower (1) is provided with an outer barrel body (1.1), a liquid discharge funnel (1.8) is arranged at an opening of the outer barrel body (1.1), an inner barrel body (1.2) is arranged in the outer barrel body (1.1), the outer barrel body (1.1) and the inner barrel body (1.2) are coaxially arranged, an outer cavity (1.4) is formed between the outer barrel body (1.1) and the inner barrel body (1.2), an annular filter layer (1.11) is arranged at the opening of the outer cavity (1.4), and the inner barrel body (1.2) is surrounded to form an inner cavity (1.3);
an air inlet pipe (1.5) and an air outlet pipe (1.7) are arranged on the decarburization tower (1), the air inlet pipe (1.5) is positioned at the lower part of the decarburization tower (1), the air outlet pipe (1.7) is positioned at the upper part of the decarburization tower (1), and the air inlet pipe (1.5) and the air outlet pipe (1.7) are both opened in the inner cavity (1.3);
a liquid inlet pipe (1.6) and a liquid outlet pipe (1.9) are arranged on the decarburization tower (1), the liquid inlet pipe (1.6) is positioned at the upper part of the decarburization tower (1), the outlet of the liquid inlet pipe (1.6) is positioned in the inner cavity (1.3), the liquid outlet pipe (1.9) is positioned at the lower part of the decarburization tower (1), and the inlet of the liquid outlet pipe (1.9) is positioned in the outer cavity (1.4);
the upper part of the decarbonization tower (1) is provided with a vent hole (1.10).
2. A device for decarbonising gases according to claim 1, characterized in that: the liquid discharge funnel (1.8) is also connected with the flash tank (3), and the liquid discharge funnel (1.8) is connected with the third valve (7).
3. A device for decarbonising gases according to claim 1, characterized in that: the device for decarbonizing gases further comprises a gas filter (8), wherein the gas filter (8) is connected with the gas inlet pipe (1.5).
4. A device for decarbonising gases according to claim 1, characterized in that: the exhaust pipe (1.7) is positioned on the central axis of the decarbonization tower (1).
5. A device for decarbonising gases according to claim 1, characterized in that: and a liquid distributor is arranged in the inner cavity (1.3) and is connected with a liquid inlet pipe (1.6).
6. A device for decarbonising gases according to claim 1, characterized in that: and a gas distributor is arranged in the inner cavity (1.3) and is connected with a gas inlet pipe (1.5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921169410.3U CN210584351U (en) | 2019-07-24 | 2019-07-24 | Be used for gaseous decarbonization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921169410.3U CN210584351U (en) | 2019-07-24 | 2019-07-24 | Be used for gaseous decarbonization device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210584351U true CN210584351U (en) | 2020-05-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921169410.3U Active CN210584351U (en) | 2019-07-24 | 2019-07-24 | Be used for gaseous decarbonization device |
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| Country | Link |
|---|---|
| CN (1) | CN210584351U (en) |
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2019
- 2019-07-24 CN CN201921169410.3U patent/CN210584351U/en active Active
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