CN212632255U - Tail gas alkali washing device for ethylene glycol production process - Google Patents
Tail gas alkali washing device for ethylene glycol production process Download PDFInfo
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- CN212632255U CN212632255U CN202020936522.3U CN202020936522U CN212632255U CN 212632255 U CN212632255 U CN 212632255U CN 202020936522 U CN202020936522 U CN 202020936522U CN 212632255 U CN212632255 U CN 212632255U
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Abstract
The utility model belongs to the technical field of tail gas treatment, in particular to a tail gas alkali washing device in an ethylene glycol production process, which comprises an upper end enclosure, a cylinder body, supporting legs, a packing layer, a wire mesh demister and a spray pipe; a tail gas outlet is arranged in the middle of the top of the upper end enclosure; the peripheral surface of the cylinder body is provided with a tail gas inlet, an alkali liquor and desalted water inlet, a compressor condensate inlet, an alkali liquor circulating inlet, a hand hole, a heat source inlet, an on-site liquid level meter upper opening, an on-site liquid level meter lower opening, a remote transmission liquid level meter upper opening and a remote transmission liquid level meter lower opening; an alkali liquor outlet is arranged right below the cylinder body; the utility model is used for ethylene glycol production technology contains acid gas's tail gas treatment, removes acid gas through alkaline cleaning, sets up the heat source import, utilizes heat source heating desalinized water washing packing layer dirt, has kept the long-time operation of alkaline cleaner to the corruption of technology tail gas to the compressor has been protected effectively.
Description
Technical Field
The utility model belongs to the technical field of the tail gas treatment, concretely relates to ethylene glycol production technology tail gas alkali wash ware.
Background
The production process of the coal-to-ethylene glycol project can generate partial tail gas, the tail gas contains acidic gases such as carbon monoxide, nitric oxide and nitrogen dioxide, and the tail gas containing the acidic gases can corrode a compressor when the compressor is compressed, so that the compressor is easy to damage, the operation period is short, and the operation cost is increased. The traditional alkali cleaner can deposit dirt on the filler layer after running for a certain time, so that the neutralization effect of the alkali cleaner is influenced, and the service life of the alkali cleaner is shortened.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model provides a glycol production process tail gas alkali washing device which has simple structure, small occupied space and convenient use, can clean the dirt of a packing layer and prolong the service life of the cleaning device.
In order to achieve the above purpose, the technical solution of the present invention is as follows:
a tail gas alkali cleaner for an ethylene glycol production process comprises an upper end enclosure, a cylinder body, supporting legs, a packing layer, a wire mesh demister and a spray pipe; a tail gas outlet is arranged in the middle of the top of the upper end enclosure; the peripheral surface of the cylinder body is provided with a tail gas inlet, an alkali liquor and desalted water inlet, a compressor condensate inlet, an alkali liquor circulating inlet, a hand hole, a heat source inlet, an on-site liquid level meter upper opening, an on-site liquid level meter lower opening, a remote transmission liquid level meter upper opening and a remote transmission liquid level meter lower opening; an alkali liquor outlet is arranged right below the cylinder body; the tail gas inlet is arranged on the outer surface of the middle part of the barrel body, the tail gas inlet is connected with a pipeline with the lower part being plugged at the tail end inside the barrel body, a packing layer is arranged above the tail gas inlet, and the alkali liquor circulation inlet is arranged on the outer wall of the barrel body 15 cm-25 cm above the packing layer; the spraying pipe is arranged in the cylinder and is connected with the alkali liquor circulating inlet; the wire mesh demister is arranged above the spray pipe; the heat source inlet is arranged at the lower part of the circumferential surface of the cylinder; the upper port of the remote transmission liquid level meter and the upper port of the on-site liquid level meter are arranged on the outer surface of the cylinder body below the tail gas inlet, and the upper port of the remote transmission liquid level meter and the upper port of the on-site liquid level meter are at the same horizontal height; four support legs are uniformly arranged below the circumferential surface of the cylinder body; the hand hole is arranged on the outer surface of the barrel below the tail gas inlet.
Preferably, the filler of the filler layer is pall ring, and the thickness of the filler layer is 25 cm-30 cm.
Preferably, the spray pipe is a straight pipe with one closed end and one open end, the open end is connected with the alkali liquor circulation inlet, round holes with the same size are formed in the pipe wall of the lower half face of the spray pipe, and the hole distance along the axis of the pipeline is 5 cm-10 cm.
Preferably, the supporting legs are right-angled, and the length of the supporting legs is 40 cm-80 cm.
Preferably, the distance between the upper port of the on-site liquid level meter and the lower port of the on-site liquid level meter is equal to the distance between the upper port of the remote transmission liquid level meter and the lower port of the remote transmission liquid level meter.
Preferably, the heat source is one of low-pressure steam or hot water; the pressure of the steam is 0.2 MPa-0.8 MPa, and the temperature of the hot water is more than or equal to 60 ℃ and less than or equal to 90 ℃.
Has the advantages that:
the utility model discloses a set up packing layer and silk screen demister, utilize alkali lye to wash with alkaline the tail gas that ethylene glycol production technology produced and contain acid gas, detach acid gas in the tail gas, the silk screen demister is detached and is washed with alkaline the foam that produces, has set up the heat source import, utilizes heat source heating desalinized water to wash the packing layer dirt, has kept the long-time operation of washing with alkaline the ware to the corruption of tail gas compressor pressure has been protected effectively.
Drawings
FIG. 1 is a schematic sectional view of a preferred embodiment of the present invention;
FIG. 2 is a schematic sectional view taken along line A-A of FIG. 1;
fig. 3 is a schematic sectional view along the direction B-B in fig. 1.
FIG. 1-tail gas inlet; 2-a tail gas outlet; 3-an alkali liquor outlet; 4-inlet of alkali liquor and desalted water; 5-heat source inlet; 6-compressor condensate inlet; 7-circulation of alkali liquor and import; 8-an upper port of the field liquid level meter; 9-upper port of remote liquid level meter; 10-hand hole; 11-lower port of on-site liquid level meter; 12-lower port of remote liquid level meter; 13-upper end enclosure; 14-a cylinder body; 15-a support leg; 16-a filler layer; 17-wire mesh demister; 18-shower pipe.
Detailed Description
The present invention is further explained with reference to fig. 1, fig. 2, and fig. 3: the alkali liquor outlet 3 of the utility model is connected with the alkali liquor circulating pump through a pipeline, and the outlet of the alkali liquor circulating pump is connected with the alkali liquor circulating inlet 7 through a pipeline;
referring to fig. 1, 2 and 3, the utility model relates to a treatment of tail gas containing acid gas in ethylene glycol production process, which comprises an upper head 13, a cylinder 14, supporting legs 15, a packing layer 16, a wire mesh demister 17 and a spray pipe 18; a tail gas outlet 2 is arranged in the middle of the top of the upper end enclosure 13; the peripheral surface of the cylinder 14 is provided with a tail gas inlet 1, an alkali liquor and desalted water inlet 4, a compressor condensate inlet 6, an alkali liquor circulating inlet 7, a hand hole 10, a heat source inlet 5, an on-site liquid level meter upper opening 8, an on-site liquid level meter lower opening 11, a remote transmission liquid level meter upper opening 9 and a remote transmission liquid level meter lower opening 12; an alkali liquor outlet 3 is arranged right below the cylinder 14; the upper end enclosure 13 is tightly connected with the cylinder 14 through bolts, and a sealing gasket is arranged at the joint of the upper end enclosure 13 and the cylinder 14; the tail gas inlet 1 is arranged on the outer surface of the middle part of the cylinder body 14, the tail gas inlet 1 is connected with a pipeline with a hole at the lower part of the tail end plugged in the cylinder body 14, a packing layer 16 is arranged above the tail gas inlet 1, the packing of the packing layer 16 is a pall ring, and the thickness of the packing layer 16 is 25 cm-30 cm; the alkali liquor circulating inlet 7 is arranged on the outer wall of the barrel 14 15 cm-25 cm above the packing layer 16; the spray pipe 18 is arranged inside the cylinder 14 and is connected with the alkali liquor circulating inlet 7; the spraying pipe 18 is a straight pipe with one closed end and one open end, the open end is connected with the alkali liquor circulation inlet 7, round holes with the same size are formed in the pipe wall of the lower half face of the spraying pipe 18, and the hole distance along the axis of the pipeline is 5 cm-10 cm; the silk screen demister 17 is arranged above the spray pipe 18, and the arrangement heights of the alkali liquor and desalted water inlet 4 and the compressor condensate inlet 6 are the same as the arrangement height of the alkali liquor circulating inlet 7. The heat source inlet 5 is arranged at the lower part of the circumferential surface of the cylinder 14; the remote transmission liquid level meter upper port 9 and the field liquid level meter upper port 8 are arranged on the outer surface of the barrel 14 below the tail gas inlet 1, and the remote transmission liquid level meter upper port 9 and the field liquid level meter upper port 8 are at the same horizontal height; the distance between the upper port 8 of the on-site liquid level meter and the lower port 11 of the on-site liquid level meter is equal to the distance between the upper port 9 of the remote transmission liquid level meter and the lower port 12 of the remote transmission liquid level meter; four supporting legs 15 are uniformly arranged below the circumferential surface of the cylinder 14; the hand hole 10 is arranged on the outer surface of the barrel 14 below the tail gas inlet 1, the hand hole 10 is tightly connected with the hand hole cover through a bolt, and a sealing gasket is arranged between the hand hole 10 and the hand hole cover.
The working principle of the utility model is as follows: technological tail gas from a dimethyl oxalate purge gas storage tank, a dimethyl oxalate flash tank, a nitrogen-oxygen compound generator and the like enters a tail gas alkali scrubber from a tail gas inlet 1 and flows upwards, alkali liquor enters the tail gas alkali scrubber from an alkali liquor circulation inlet 7 and flows downwards, the technological tail gas and the alkali liquor are in full contact with each other in a packing layer 16, acid gas such as carbon monoxide gas, nitrogen oxide gas and the like and the alkali liquor are subjected to chemical reaction and absorbed, and the technological tail gas from which the acid gas is removed passes through a wire mesh foam remover 17 to remove foam generated during alkali scrubbing; the process tail gas after defoaming flows out of the tail gas outlet 2 to the tail gas compressor system. And (3) after the tail gas alkali scrubber operates until the pressure difference between the tail gas inlet 1 and the tail gas outlet 2 is increased to 2 KPa-5 KPa, indicating that the filler is blocked, emptying the alkali liquor, adding desalted water, introducing a heat source for heating, and cleaning the filler by using hot water.
The above detailed description is only an example of the present invention, and any modification and variation familiar with the present invention shall fall within the scope of the present invention, and not be limited to the examples.
Claims (6)
1. A tail gas alkali washing device for an ethylene glycol production process is characterized in that: comprises an upper end enclosure, a cylinder body, supporting legs, a packing layer, a wire mesh demister and a spray pipe; a tail gas outlet is arranged in the middle of the top of the upper end enclosure; the peripheral surface of the cylinder body is provided with a tail gas inlet, an alkali liquor and desalted water inlet, a compressor condensate inlet, an alkali liquor circulating inlet, a hand hole, a heat source inlet, an on-site liquid level meter upper opening, an on-site liquid level meter lower opening, a remote transmission liquid level meter upper opening and a remote transmission liquid level meter lower opening; an alkali liquor outlet is arranged right below the cylinder body; the tail gas inlet is arranged on the outer surface of the middle part of the barrel body, the tail gas inlet is connected with a pipeline with the lower part being plugged at the tail end inside the barrel body, a packing layer is arranged above the tail gas inlet, and the alkali liquor circulation inlet is arranged on the outer wall of the barrel body 15 cm-25 cm above the packing layer; the spraying pipe is arranged in the cylinder and is connected with the alkali liquor circulating inlet; the wire mesh demister is arranged above the spray pipe; the heat source inlet is arranged at the lower part of the circumferential surface of the cylinder; the upper port of the remote transmission liquid level meter and the upper port of the on-site liquid level meter are arranged on the outer surface of the cylinder body below the tail gas inlet, and the upper port of the remote transmission liquid level meter and the upper port of the on-site liquid level meter are at the same horizontal height; four support legs are uniformly arranged below the circumferential surface of the cylinder body; the hand hole is arranged on the outer surface of the barrel below the tail gas inlet.
2. The ethylene glycol production process tail gas caustic scrubber according to claim 1, which is characterized in that: the filler of the filler layer is pall ring, and the thickness of the filler layer is 25 cm-30 cm.
3. The ethylene glycol production process tail gas caustic scrubber according to claim 1, which is characterized in that: the spray pipe is a straight pipe with one closed end and one open end, the open end is connected with the alkali liquor circulation inlet, round holes with the same size are formed in the pipe wall of the lower half face of the spray pipe, and the hole distance along the axis of the pipeline is 5 cm-10 cm.
4. The ethylene glycol production process tail gas caustic scrubber according to claim 1, which is characterized in that: the supporting leg is right-angled, and the length of the supporting leg is 40 cm-80 cm.
5. The ethylene glycol production process tail gas caustic scrubber according to claim 1, which is characterized in that: and the distance between the upper port of the on-site liquid level meter and the lower port of the on-site liquid level meter is equal to the distance between the upper port of the remote transmission liquid level meter and the lower port of the remote transmission liquid level meter.
6. The ethylene glycol production process tail gas caustic scrubber according to claim 1, which is characterized in that: the heat source is one of low-pressure steam or hot water; the pressure of the steam is 0.2 MPa-0.8 MPa, and the temperature of the hot water is more than or equal to 60 ℃ and less than or equal to 90 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020936522.3U CN212632255U (en) | 2020-05-28 | 2020-05-28 | Tail gas alkali washing device for ethylene glycol production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020936522.3U CN212632255U (en) | 2020-05-28 | 2020-05-28 | Tail gas alkali washing device for ethylene glycol production process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212632255U true CN212632255U (en) | 2021-03-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020936522.3U Active CN212632255U (en) | 2020-05-28 | 2020-05-28 | Tail gas alkali washing device for ethylene glycol production process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212632255U (en) |
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2020
- 2020-05-28 CN CN202020936522.3U patent/CN212632255U/en active Active
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