CN216878629U - Oxidation tower exhaust gas purification device - Google Patents
Oxidation tower exhaust gas purification device Download PDFInfo
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- CN216878629U CN216878629U CN202220322584.4U CN202220322584U CN216878629U CN 216878629 U CN216878629 U CN 216878629U CN 202220322584 U CN202220322584 U CN 202220322584U CN 216878629 U CN216878629 U CN 216878629U
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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 discloses an oxidation tower waste gas purification device, which relates to the technical field of organic waste gas treatment equipment and comprises a first absorption tower and a second absorption tower, wherein an inlet of the first absorption tower is communicated with an oxidation tower waste gas pipeline, and ethanol is filled in the first absorption tower and is used for absorbing organic matters in the oxidation tower waste gas; the second absorption tower is filled with water and used for washing the gas discharged by the first absorption tower; a first air inlet pipeline is arranged at the bottom of the first absorption tower, a second air inlet pipeline is arranged at the bottom of the second absorption tower, and bubbling devices are arranged at outlets of the first air inlet pipeline and the second air inlet pipeline; and the first absorption tower and the second absorption tower are respectively provided with a first circulating device and a second circulating device. The method is used for purifying the waste gas of the oxidation tower of the o-methylbenzoic acid device, can effectively remove organic matters such as o-xylene and the like in the waste gas, and reduces the pollution of the waste gas of the oxidation tower to the environment.
Description
Technical Field
The utility model relates to the technical field of organic waste gas treatment equipment, in particular to an oxidation tower waste gas purification device.
Background
The o-methylbenzoic acid is a common organic synthesis intermediate, can be used for synthesizing organic chemical products such as pesticides and the like, is a main raw material for producing rice straw-free products, is mainly prepared industrially by a liquid-phase oxidation method, and is specifically prepared by oxidizing o-xylene by using concentrated nitric acid or air as an oxidant.
The reaction for preparing o-methylbenzoic acid by using air as an oxidant is carried out in an oxidation tower, and because the using amount of air is large, a large amount of waste gas is generated in the reaction process, and the waste gas contains a large amount of nitrogen, a small amount of oxygen and water vapor and a small amount of organic gas, wherein the main component of the organic gas is o-xylene steam, and the organic gas is toxic gas. Generally, due to the energy-saving requirement, the waste gas of the oxidation tower is subjected to heat exchange and temperature reduction treatment, wherein most o-xylene steam is condensed into liquid so as to be separated from a gas phase, but the gas phase still contains a certain amount of o-xylene steam and can be liquefied by pressurization due to the action of gas-liquid balance. Therefore, the exhaust gas from the oxidation tower cannot be directly discharged to the atmosphere, and it is necessary to remove the organic gas.
SUMMERY OF THE UTILITY MODEL
The utility model aims to: provides an oxidation tower waste gas purification device, which can fully remove organic gas in the oxidation tower waste gas of an o-methylbenzoic acid device so as to avoid polluting the environment.
The technical scheme adopted by the utility model is as follows:
an oxidation tower waste gas purification device is used for purification treatment of oxidation tower waste gas of an o-methylbenzoic acid device, and comprises:
the inlet of the first absorption tower is communicated with an oxidation tower waste gas pipeline, ethanol is contained in the first absorption tower and is used for absorbing organic matters in the oxidation tower waste gas, and an outlet is formed in the tower top of the first absorption tower;
the inlet of the second absorption tower is communicated with the outlet of the first absorption tower, water is contained in the second absorption tower and is used for washing gas discharged by the first absorption tower, and an outlet is formed in the tower top of the second absorption tower;
the bottom of the first absorption tower is provided with a first air inlet pipeline used for introducing the waste gas of the oxidation tower into the bottom of the first absorption tower, the bottom of the second absorption tower is provided with a second air inlet pipeline used for communicating the tower top of the first absorption tower with the tower bottom of the second absorption tower, and outlets of the first air inlet pipeline and the second air inlet pipeline are respectively provided with a bubbling device.
Preferably, a cooling water jacket is provided on an outer side of the first air intake duct for cooling the gas passing through the first air intake duct.
Preferably, the first absorption tower is further provided with a first circulating device, and the first circulating device is used for circulating the ethanol in the first absorption tower between the tower top and the tower top.
Preferably, the second absorption tower is further provided with a second circulating device, and the second circulating device is used for circulating water in the second absorption tower between the tower top and the tower top.
Preferably, the first circulation device comprises a first circulation pump, an inlet of the first circulation pump is communicated with the bottom of the first absorption tower, an outlet of the first circulation pump is communicated with the top of the first absorption tower through a first pipeline, and the first pipeline is provided with a spray header inside the first absorption tower.
Preferably, the second circulating device comprises a second circulating pump, an inlet of the second circulating pump is communicated with the bottom of the second absorption tower, an outlet of the second circulating pump is communicated with the top of the second absorption tower through a second pipeline, and the second pipeline is provided with a spray header inside the second absorption tower.
In summary, due to the adoption of the technical scheme, the utility model has the beneficial effects that:
(1) according to the utility model, organic substances in the waste gas of the oxidation tower are absorbed by the first absorption tower, and the o-xylene in the waste gas is absorbed mainly by using the solubility of ethanol to the o-xylene, so that the content of the o-xylene in the waste gas is greatly reduced;
(2) according to the utility model, the first circulating device and the second circulating device are arranged, so that ethanol and water in the first absorption tower and the second absorption tower can be sprayed out from the tower top, so that waste gas of the oxidation tower can be sprayed, and the absorption effects of the first absorption tower and the second absorption tower are improved;
(3) the outlets of the first air inlet pipeline and the second air inlet pipeline are provided with bubbling devices, so that the waste gas of the oxidation tower is favorably dispersed into ethanol or water, and the absorption effect of the first absorption tower and the second absorption tower is improved.
Drawings
Fig. 1 is a schematic perspective view of embodiment 1.
Fig. 2 is a front view structural diagram of embodiment 1.
Fig. 3 is a schematic perspective view of embodiment 2.
The labels in the figure are: 1. a first absorption tower; 2. a second absorption tower; 101. a first air intake duct; 102. a cooling water jacket; 201. a second air intake duct; 1031. a first circulation pump; 1032. a first conduit; 2021. a second circulation pump; 2022. a second conduit.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and embodiments, it being understood that the specific embodiments described herein are only for the purpose of explaining the present invention and are not intended to limit the present invention.
Example 1
As shown in fig. 1 and fig. 2, the present embodiment provides an oxidation tower waste gas purification device, which is used for purification treatment of oxidation tower waste gas of an o-methylbenzoic acid device, and mainly comprises a first absorption tower 1 and a second absorption tower 2.
The inlet of the first absorption tower 1 is communicated with an oxidation tower waste gas pipeline, ethanol is contained in the first absorption tower 1, and organic matters in the oxidation tower waste gas are absorbed by utilizing the solubility of organic matters such as o-xylene and the like in the ethanol, the ethanol used in the embodiment is absolute ethanol, in some embodiments, the ethanol with the purity not lower than 95% can be used for substitution, an outlet is arranged at the tower top of the first absorption tower 1 and used for discharging treated gas, and the gas contains a certain amount of ethanol steam because the ethanol is volatile.
The inlet of the second absorption tower 2 is communicated with the outlet of the first absorption tower 1, the second absorption tower 2 is filled with desalted water and used for washing the gas discharged from the first absorption tower 1 and removing most of ethanol in the gas, the top of the second absorption tower 2 is provided with an outlet, and the gas treated by the second absorption tower 2 is discharged from the outlet.
The bottom of the first absorption tower 1 is provided with a first air inlet pipeline 101 for introducing the oxidation tower waste gas into the bottom of the first absorption tower 1, the bottom of the second absorption tower 2 is provided with a second air inlet pipeline 201 for communicating the tower top of the first absorption tower 1 with the tower bottom of the second absorption tower 2, and outlets of the first air inlet pipeline 101 and the second air inlet pipeline 201 are provided with bubbling devices.
The first absorption tower 1 is further provided with a first circulating device, the first circulating device is used for enabling the ethanol in the first absorption tower 1 to circulate between the tower top and the tower top, the first circulating device comprises a first circulating pump 1031 and a first pipeline 1032, an inlet of the first circulating pump 1031 is communicated with the bottom of the first absorption tower 1, an outlet of the first circulating pump 1031 is communicated with the top of the first absorption tower 1 through the first pipeline 1032, the first pipeline 1032 is provided with a spray head in the first absorption tower 1, and the ethanol can be sprayed out of the first pipeline 1032 to wash the gas in the first absorption tower 1, so that the absorption effect is improved.
The second absorption tower 2 is further provided with a second circulating device, the second circulating device is used for enabling water in the second absorption tower 2 to circulate between the tower top and the tower top, the second circulating device comprises a second circulating pump 2021 and a second pipeline 2022, an inlet of the second circulating pump 2021 is communicated with the bottom of the second absorption tower 2, an outlet of the second circulating pump 2021 is communicated with the top of the second absorption tower 2 through the second pipeline 2022, and the second pipeline 2022 is provided with a spray header inside the second absorption tower 2, so that a leaching effect can be achieved.
First circulating pump 1031, second circulating pump 2021 are the peristaltic pump, can separate the liquid of pumping with the pump body through the hose, avoid corroding.
The working principle is as follows: the method has the advantages that the ethanol has good solubility on organic matters such as o-xylene, the waste gas of the oxidation tower sequentially passes through the first absorption tower 1 and the second absorption tower 2, the waste gas is respectively washed by the ethanol and the water, so that the organic matters such as o-xylene in the waste gas of the oxidation tower are removed, the ethanol steam brought in the purification process is removed, a good purification effect is achieved, and the pollution of the waste gas of the oxidation tower to the atmosphere is reduced.
Example 2
As shown in fig. 3, the present embodiment is different from embodiment 1 in that a cooling water jacket 102 is disposed outside the first air inlet duct 101, and circulating water can be introduced into the cooling water jacket 102 for cooling the exhaust gas of the oxidation tower passing through the first air inlet duct 101, so as to cool the exhaust gas, and prevent the ethanol from boiling or evaporating in a large amount due to the excessively high temperature of the exhaust gas of the oxidation tower.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. An oxidation tower waste gas purification device is used for purifying and treating the waste gas of an oxidation tower of an o-methylbenzoic acid device, and is characterized by comprising the following steps:
the inlet of the first absorption tower (1) is communicated with an oxidation tower waste gas pipeline, ethanol is contained in the first absorption tower (1) and is used for absorbing organic matters in the oxidation tower waste gas, and an outlet is formed in the tower top of the first absorption tower (1);
the inlet of the second absorption tower (2) is communicated with the outlet of the first absorption tower (1), the second absorption tower (2) is filled with water and used for washing gas discharged from the first absorption tower (1), and the top of the second absorption tower (2) is provided with an outlet;
the bottom of the first absorption tower (1) is provided with a first air inlet pipeline (101) for introducing the waste gas of the oxidation tower into the bottom of the first absorption tower (1), the bottom of the second absorption tower (2) is provided with a second air inlet pipeline (201) for communicating the tower top of the first absorption tower (1) with the tower bottom of the second absorption tower (2), and outlets of the first air inlet pipeline (101) and the second air inlet pipeline (201) are provided with bubbling devices.
2. An oxidation tower exhaust gas purification apparatus according to claim 1, wherein a cooling water jacket (102) is provided outside the first air intake duct (101) for cooling the gas passing through the first air intake duct (101).
3. The oxidation tower off-gas purification device according to claim 1, wherein the first absorption tower (1) is further provided with a first circulation device for circulating ethanol in the first absorption tower (1) between the tower top and the tower top thereof.
4. The oxidation tower off-gas purification apparatus as claimed in any one of claims 1 to 3, wherein the second absorption tower (2) is further provided with a second circulation device for circulating water in the second absorption tower (2) between the top of the second absorption tower and the top of the second absorption tower.
5. The oxidation tower off-gas purification device according to claim 3, wherein the first circulation means comprises a first circulation pump (1031), an inlet of the first circulation pump (1031) communicates with a bottom of the first absorption tower (1), an outlet of the first circulation pump (1031) communicates with a top of the first absorption tower (1) through a first pipe (1032), and the first pipe (1032) is provided with a shower head inside the first absorption tower (1).
6. The oxidation tower off-gas purification apparatus according to claim 4, wherein the second circulation means comprises a second circulation pump (2021), an inlet of the second circulation pump (2021) is communicated with a bottom of the second absorption tower (2), an outlet of the second circulation pump (2021) is communicated with a top of the second absorption tower (2) through a second pipe (2022), and the second pipe (2022) is provided with a shower head inside the second absorption tower (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220322584.4U CN216878629U (en) | 2022-02-17 | 2022-02-17 | Oxidation tower exhaust gas purification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220322584.4U CN216878629U (en) | 2022-02-17 | 2022-02-17 | Oxidation tower exhaust gas purification device |
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| Publication Number | Publication Date |
|---|---|
| CN216878629U true CN216878629U (en) | 2022-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220322584.4U Active CN216878629U (en) | 2022-02-17 | 2022-02-17 | Oxidation tower exhaust gas purification device |
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| CN (1) | CN216878629U (en) |
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2022
- 2022-02-17 CN CN202220322584.4U patent/CN216878629U/en active Active
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