CN210993616U - Internode extrinsic cycle low pressure nitrate fume absorbing device - Google Patents
Internode extrinsic cycle low pressure nitrate fume absorbing device Download PDFInfo
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- CN210993616U CN210993616U CN201921434249.8U CN201921434249U CN210993616U CN 210993616 U CN210993616 U CN 210993616U CN 201921434249 U CN201921434249 U CN 201921434249U CN 210993616 U CN210993616 U CN 210993616U
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Abstract
The utility model relates to an internode external circulation low-pressure smoke absorption device, which comprises an absorption tower body, a heat exchanger and a circulating pump, wherein the top end of the absorption tower body is provided with a smoke outlet, and the bottom end of the absorption tower body is provided with a liquid outlet; the lower part of the absorption tower body is provided with a smoke inlet; the absorption tower body comprises at least 2 absorption tower sections, each absorption tower section comprises a liquid circulation inlet, a calandria distribution pipe, a filler and a collector which are arranged from top to bottom, one side of the collector is provided with a liquid circulation outlet, the liquid circulation outlet is connected with the liquid circulation inlet through a circulation pipeline, and the circulation pipeline is provided with a heat exchanger and a circulation pump; this smoke absorption device simple structure provides sufficient area of contact, guarantees the two-phase abundant contact of gas-liquid, effectively removes the reaction heat simultaneously, improves smoke absorption efficiency, is applicable to the absorption of different content nitrogen oxide tail gas, and the content of nitrogen oxide is far less than national emission standard in the tail gas after the absorption, satisfies different areas and discharges the requirement.
Description
Technical Field
The utility model relates to an internode extrinsic cycle low pressure nitrate fume absorbing device belongs to nitrogen oxide containing tail gas processing technology field.
Background
The nitrogen oxides including N2O、 NO、 NO2、N2O3、N2O4、N2O5Etc., usually with NOXAnd (4) showing. The nitrogen oxides generated by human activities are partially discharged from industrial fuel combustion and transportation fuel combustion, and are partially discharged from nitric acid plants, sulfuric acid plants, nitrogen fertilizer plants, fuel plants, explosive plants and various nitric acid using places. The hazards of nitrogen oxides are mainly: toxic effects on the human body (the affinity of NO and hemoglobin is several hundred times greater than the affinity of CO for hemoglobin); damaging effects on plants; forming acid mist in the atmosphere; forming photochemical smog with hydrocarbon; participate in destroying the ozone layer of the atmosphere and the like, and are one of the main pollution sources causing air pollution.
The traditional nitrogen oxide absorption device is a plate-type absorption tower adopting a pressurization method, a heat exchange coil is added on an absorption plate to remove reaction heat, and the absorption pressure of 0.6-1.1MPa is adopted to increase NOXSolubility in liquid phase, promoting reaction toward volume reduction, and making NO in gas phaseXThe conversion produces dilute nitric acid. When the nitrate smoke content and the gas amount are relatively stable, the elasticity requirement can be basically met by selecting a proper sieve plate tower; however, when the air inflow and the content of the nitric oxide are unstable, the nitric oxide absorption tower is not operated near a design value, the dry plate or the liquid layer can not immerse the heat exchange tube, the mass transfer efficiency and the heat transfer efficiency are greatly reduced, and the contact between gas and liquid can not be ensured, so that the absorption efficiency is reduced, and the absorption of the nitric oxide is not ideal.
SUMMERY OF THE UTILITY MODEL
The utility model provides an internode extrinsic cycle low pressure nitre cigarette absorbing device to the not enough of existence among the prior art to solve the problem that exists among the prior art.
In order to achieve the above object, the utility model adopts the following technical scheme:
an internode external circulation low-pressure smoke absorption device comprises an absorption tower body, a heat exchanger and a circulating pump, wherein a smoke outlet is formed in the top end of the absorption tower body, and a liquid outlet is formed in the bottom end of the absorption tower body; the lower part of the absorption tower body is provided with a smoke inlet; the absorption tower body comprises at least 2 absorption tower sections, the absorption tower sections are sequentially arranged in the absorption tower body from top to bottom, each absorption tower section comprises a liquid circulation inlet, a calandria type distribution pipe, a filler and a collector, a liquid circulation outlet is arranged on one side of the collector, the liquid circulation outlet is connected with the liquid circulation inlet through a circulation pipeline, and a heat exchanger and a circulation pump are arranged on the circulation pipeline; the smoke inlet is arranged below the tower section of the absorption tower.
As an improvement of the utility model, the filler lower extreme is equipped with filler support piece, both ends all link to each other with absorption tower festival inside wall about filler support piece.
As an improvement of the utility model, the top end of the tower body of the absorption tower is provided with a top head of the absorption tower.
As an improvement of the utility model, the bottom end of the absorption tower body is provided with an absorption tower bottom head.
As an improvement of the utility model, the upper end of the inner side of the absorption tower body is provided with a wire mesh demister.
As an improvement of the utility model, every absorption tower section all is equipped with the level gauge.
As an improvement of the utility model, every absorption tower section all is equipped with the manhole.
As an improvement of the utility model, the top of the tower body of the absorption tower is provided with a side wall type lug.
As an improvement of the utility model, the filler is ceramic filler.
As an improvement of the utility model, at least 2 ear seats are arranged on the side wall of the absorption tower body.
The utility model relates to an internode extrinsic cycle low pressure nitre cigarette absorbing device, this nitre cigarette absorbing device simple structure, operating condition is mild, is applicable to the absorption of different content nitrogen oxide tail gas, and the content of nitrogen oxide is far below national emission standard in the tail gas after the absorption.
Owing to adopted above technique, the utility model discloses compare than prior art, the beneficial effect who has as follows:
1) the absorption tower adopts an internode external circulation packed tower to absorb the smoke of the nitrate, and a strict countercurrent fractional absorption process ensures that absorption liquid only circulates in the tower section of the absorption tower, so that the liquid is prevented from being back-mixed;
2) the large-flow absorption liquid internode external circulation ensures the wetting of the surface of the filler, eliminates gas short circuit, ensures the effective absorption of gas, and the external heat exchanger also ensures the effective removal of reaction heat, reduces the absorption temperature, promotes the forward reaction, and improves the absorption efficiency of the smoke;
3) the absorption tower absorbs the nitrogen oxide tail gas in sections, more theoretical stages are provided, and the absorption efficiency is far higher than that of the traditional filler absorption tower;
4) the method for absorbing the nitrate smoke by adopting the low-pressure internode external circulation countercurrent is carried out under the conditions that the absorption pressure is 0.1-0.2 MPa and the absorption temperature is 10-30 ℃, and is far lower than the high pressure of the traditional nitrate smoke absorption, so that the energy consumption is reduced, and the reliability of the device is improved.
Drawings
FIG. 1 is a schematic structural diagram of an internode external circulation low-pressure smoke absorption device;
in the figure: 1. absorption tower body, 2, top of the tower head, 3, the nitrate fume outlet, 4, side wall formula lug, 5, silk screen demister, 6, manhole, 7, liquid circulation import, 8, calandria distributing pipe, 9, filler, 10, filler support piece, 11, collector, 12, liquid circulation export, 13, level gauge, 14, ear seat, 15, heat exchanger, 16, circulating pump, 17, nitrate fume import, 18, bottom of the tower head, 19, liquid outlet, 20, circulating line.
Detailed Description
The invention will be further elucidated with reference to the drawings and the detailed description.
With the attached drawing, the internode external circulation low-pressure smoke absorption device comprises an absorption tower body 1, a heat exchanger 15 and a circulating pump 16, wherein a smoke outlet 3 is formed in the top end of the absorption tower body 1, and a liquid outlet 19 is formed in the bottom end of the absorption tower body 1; the lower part of the absorption tower body 1 is provided with a smoke inlet 17; the absorption tower body 1 comprises at least 2 absorption tower sections, the absorption tower sections are sequentially arranged in the absorption tower body 1 from top to bottom, each absorption tower section comprises a liquid circulation inlet 7, a calandria distribution pipe 8, a filler 9 and a collector 11 which are arranged from top to bottom, a liquid circulation outlet 12 is arranged on one side of the collector 11, the liquid circulation outlet 12 is connected with the liquid circulation inlet 7 through a circulation pipeline 20, and a heat exchanger 15 and a circulation pump 16 are arranged on the circulation pipeline 20; the smoke inlet 17 is arranged below the tower section of the absorption tower.
The lower end of the packing 9 is provided with a packing support member 10, and the left end and the right end of the packing support member 10 are connected with the inner side wall of the tower section of the absorption tower.
And the top end of the absorption tower body 1 is provided with an absorption tower top end enclosure 2.
And the bottom end of the absorption tower body 1 is provided with an absorption tower bottom end enclosure 18.
And the upper end of the inner side of the absorption tower body 1 is provided with a wire mesh demister 5.
And each absorption tower section is provided with a liquid level meter 13.
Every absorption tower section all is equipped with manhole 6, and manhole 6 all sets up on every section lateral wall upper portion for maintenance personal business turn over maintenance or change packs 9.
The top of the absorption tower body 1 is provided with a side wall type lifting lug 4.
The filler 9 is a ceramic filler 9, and the high-efficiency high-infiltration ceramic filler 9 is selected as a reaction and mass transfer interface, so that a film is formed on the surface of the filler 9 by liquid, a sufficient contact area is provided, and the gas-liquid phase is ensured to be fully contactedNO in the gas phaseXCan enter into liquid phase more quickly to participate in the reaction process.
And at least 2 ear seats 14 are arranged on the side wall of the absorption tower body 1.
The utility model adopts the circulating pump 16 to circulate the liquid phase with large flow, which ensures the wetting of the surface of the filler 9; meanwhile, the external heat exchanger 15 also ensures that the reaction heat is taken out in time, and the absorption efficiency of the smoke is greatly improved.
The function of the calandria distribution pipe 8 is to distribute the liquid evenly over the packing layer.
The specific use mode is as follows: after being pressurized by a smoke compressor, the waste gas containing nitrogen oxides to be purified firstly enters the absorption tower body 1 from a smoke inlet 17 and fully reacts with absorption liquid in a countercurrent mode in a packing layer; part of absorption liquid after absorbing the smoke enters a dilute nitric acid tank from a liquid outlet 19 at the bottom end, part of the absorption liquid is sent to a liquid circulation inlet 7 through a circulating pump 16 and a heat exchanger 15 and then enters a smoke absorption tower body 1, the absorption liquid is uniformly distributed through a calandria distribution pipe 8 and is subjected to countercurrent absorption with the smoke again, and thus internode multi-cycle is formed; the residual tail gas continuously flows upwards, enters the middle section for absorption and the upper section for absorption, and is subjected to stage-by-stage countercurrent absorption in the same way as the lower section for absorption (absorption liquid enters the liquid circulation inlet 7 from the liquid circulation outlet 12 through the circulation pipeline 20), the absorbed tail gas is discharged from the smoke outlet 3 and then enters the next absorption tower, and finally, the content of nitrogen oxide in the discharged tail gas is ensured to be lower than 100mg/m after the tail gas is subjected to multi-tower series absorption3。
The internode external circulation low-pressure smoke absorption device provided by the utility model obviously improves the absorption efficiency of the smoke, the technological process conditions are mild, and the safety is high; compared with the similar technology, the energy consumption is lower, and the operation cost is reduced; the technology has great flexibility, is suitable for absorbing tail gas with different contents of nitrogen oxides, and can ensure that the emission of the tail gas is controlled at an ideal level.
The above-mentioned embodiments are merely preferred technical solutions of the present invention, and should not be regarded as limitations of the present invention, and the protection scope of the present invention should be protected by the technical solutions described in the claims, and equivalent alternatives including technical features in the technical solutions described in the claims are also within the protection scope of the present invention.
Claims (10)
1. The utility model provides an internode extrinsic cycle low pressure nitre cigarette absorbing device which characterized in that: the device comprises an absorption tower body, a heat exchanger and a circulating pump, wherein a smoke outlet is formed in the top end of the absorption tower body, and a liquid outlet is formed in the bottom end of the absorption tower body; the lower part of the absorption tower body is provided with a smoke inlet; the absorption tower body comprises at least 2 absorption tower sections, the absorption tower sections are sequentially arranged in the absorption tower body from top to bottom, each absorption tower section comprises a liquid circulation inlet, a calandria type distribution pipe, a filler and a collector, a liquid circulation outlet is arranged on one side of the collector, the liquid circulation outlet is connected with the liquid circulation inlet through a circulation pipeline, and a heat exchanger and a circulation pump are arranged on the circulation pipeline; the smoke inlet is arranged below the tower section of the absorption tower.
2. The internode external circulation low pressure nitric oxide absorption device according to claim 1, characterized in that: the lower end of the filler is provided with a filler support piece, and the left end and the right end of the filler support piece are connected with the inner side wall of the tower section of the absorption tower.
3. The internode external circulation low pressure nitric oxide absorption device according to claim 1, characterized in that: and the top end of the absorption tower body is provided with an absorption tower top end enclosure.
4. The internode external circulation low pressure nitric oxide absorption device according to claim 1, characterized in that: and the bottom end of the absorption tower body is provided with an absorption tower bottom end enclosure.
5. The internode external circulation low pressure nitric oxide absorption device according to claim 1, characterized in that: and the upper end of the inner side of the absorption tower body is provided with a wire mesh demister.
6. The internode external circulation low pressure nitric oxide absorption device according to claim 1, characterized in that: and each absorption tower section is provided with a liquid level meter.
7. The internode external circulation low pressure nitric oxide absorption device according to claim 1, characterized in that: and each absorption tower section is provided with a manhole.
8. The internode external circulation low pressure nitric oxide absorption device according to claim 1, characterized in that: and the top of the tower body of the absorption tower is provided with a side wall type lifting lug.
9. The internode external circulation low pressure nitric oxide absorption device according to claim 1, characterized in that: the filler is ceramic filler.
10. The internode external circulation low pressure nitric oxide absorption device according to claim 1, characterized in that: and at least 2 lug seats are arranged on the side wall of the absorption tower body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921434249.8U CN210993616U (en) | 2019-08-30 | 2019-08-30 | Internode extrinsic cycle low pressure nitrate fume absorbing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921434249.8U CN210993616U (en) | 2019-08-30 | 2019-08-30 | Internode extrinsic cycle low pressure nitrate fume absorbing device |
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| Publication Number | Publication Date |
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| CN210993616U true CN210993616U (en) | 2020-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921434249.8U Active CN210993616U (en) | 2019-08-30 | 2019-08-30 | Internode extrinsic cycle low pressure nitrate fume absorbing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114100317A (en) * | 2021-11-16 | 2022-03-01 | 湖北东方化工有限公司 | Method for recovering functions of bubble cap absorption tower through forced circulation and application |
-
2019
- 2019-08-30 CN CN201921434249.8U patent/CN210993616U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114100317A (en) * | 2021-11-16 | 2022-03-01 | 湖北东方化工有限公司 | Method for recovering functions of bubble cap absorption tower through forced circulation and application |
| CN114100317B (en) * | 2021-11-16 | 2023-03-31 | 湖北东方化工有限公司 | Method for recovering functions of bubble cap absorption tower through forced circulation and application |
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