CN211025809U - Sulfur tail gas purifying tower - Google Patents
Sulfur tail gas purifying tower Download PDFInfo
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- CN211025809U CN211025809U CN201921856929.9U CN201921856929U CN211025809U CN 211025809 U CN211025809 U CN 211025809U CN 201921856929 U CN201921856929 U CN 201921856929U CN 211025809 U CN211025809 U CN 211025809U
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Abstract
The utility model discloses a sulphur tail gas clean-up tower, its characterized in that, the inside below on flue gas scrubbing layer of tower body is equipped with the spraying section, the central air current passageway that link up about the middle part of spraying section is established leaves the interval between central air current passageway's lateral wall and the tower body inside wall, forms annular air current passageway. The thick liquid has two kinds of operating condition of low liquid level and high liquid level in the tower body, central air current passageway's end opening is higher than low liquid level, and be less than high liquid level, the utility model discloses flue gas purification tower is through setting up central air current passageway at the spraying section, utilizes to handle different concentration SO2As requiredThe difference of the slurry amount forms two working states of the flue gas purification tower, which is convenient for processing the flue gas with large fluctuation range of pollutants. The utility model discloses technical scheme is simple, and the construction degree of difficulty is little, and investment cost is low, can be used to old tower transformation project, also can be used to newly-built project.
Description
Technical Field
The utility model belongs to the waste gas treatment field specifically is a sulfur tail gas purification tower.
Background
Sulfur tail gas, in normal condition, outlet SO2Concentration of (b) is typically several hundred milligrams per square, short-term outlet SO under shutdown purge conditions and bypass conditions2Can be as high as tens of thousands of milligrams per standard, due to SO2The concentration fluctuation is large, and the emission requirement is generally difficult to meet by adopting the design of a conventional wet desulphurization tower.
Disclosure of Invention
The utility model designs a novel sulfur tail gas purifying tower, which aims at SO in sulfur tail gas under different working conditions2The concentration fluctuation is large, and the adaptability is better.
The technical scheme for realizing the technical purpose is as follows:
a sulfur tail gas purification tower comprises a tower body, wherein a flue gas inlet is formed in the lower portion of the tower body, a flue gas outlet is formed in the upper portion of the tower body, a demister is arranged in the tower body in front of the flue gas outlet, a flue gas washing layer is arranged below the demister, and the sulfur tail gas purification tower is characterized in that a spraying section is arranged below the flue gas washing layer in the tower body;
when the washing layer and the spraying section work simultaneously, the liquid level of the slurry pool at the bottom of the tower body adapted to the washing layer and the spraying section is a high liquid level; when only the washing layer works, the liquid level of the slurry pool is a low liquid level, namely, the slurry in the tower body has two working states of a low liquid level and a high liquid level;
a central air flow channel which is communicated up and down is arranged in the middle of the spraying section, and a space is reserved between the outer side wall of the central air flow channel and the inner side wall of the tower body to form an annular air flow channel;
the top opening of the central airflow channel is positioned below the washing layer, and the bottom opening is higher than the low liquid level and lower than the high liquid level;
the annular airflow channel is divided into a plurality of unit channels by longitudinal clapboards and comprises an outlet unit channel, an inlet unit channel and a middle unit channel, the tops of the inlet unit channel and the middle unit channel are sealed by cover plates, and the inlet unit channel is communicated with the flue gas inlet;
except the outlet unit channel and the inlet unit channel, other adjacent unit channels are communicated through notches on the longitudinal partition plates, the notches on the adjacent longitudinal partition plates are arranged in a vertically staggered manner, the height of the lower notch is higher than the high liquid level, and the bottom edge of the partition plate with the upper notch is lower than the high liquid level; the bottom end of the partition plate between the outlet unit channel and the inlet unit channel is lower than the high liquid level, and the top end of the partition plate is connected with the cover plate.
On the basis of the above scheme, a further improved or preferred scheme further comprises:
and the spraying devices of the spraying section are distributed on the outer side wall of the central airflow channel in a surrounding manner or on the inner side wall of the tower body corresponding to the central airflow channel, and spray absorption liquid to the smoke in the annular airflow channel.
The spraying device is arranged on the outer side wall of the central airflow channel and is connected with an external slurry conveying system through a liquid conveying pipeline, and the liquid conveying pipeline is made of rigid materials and embedded on the wall surface of the central airflow channel to serve as a longitudinal supporting member of the central airflow channel.
The cross section of the central airflow channel is in a regular polygon shape, one end of the longitudinal partition plate is connected with the inner side wall of the tower body, and the other end of the longitudinal partition plate is connected with the corner of the central airflow channel, so that the annular airflow channel is divided into a corresponding number of channels.
When the sulfur tail gas purification tower is designed to be air-intake downwards, namely the flue gas inlet is closer to the bottom of the flue gas inlet channel, the cross section of the central air flow channel is in a regular triangle or other regular polygons with odd numbers of sides, one end of the longitudinal partition plate is connected with the inner side wall of the tower body, the other end of the longitudinal partition plate is connected with the corner of the central air flow channel, the annular air flow channel is divided into three or corresponding number of unit channels, a gap is arranged above the partition plate between the flue gas inlet channel and the adjacent middle channel, and after entering the tower, the flue gas firstly flows upwards and finally flows into the outlet unit channel.
When the sulfur tail gas purification tower is designed to be an upper inlet, namely the flue gas inlet is closer to the top of the flue gas inlet channel, the cross section of the central air flow channel is a square or a regular polygon with even number of sides, one end of the longitudinal partition plate is connected with the inner side wall of the tower body, the other end of the longitudinal partition plate is connected with the corner of the central air flow channel, the annular air flow channel is divided into four or corresponding number of unit channels, a gap is arranged below the partition plate between the flue gas inlet channel and the adjacent middle channel, and after entering the tower, the flue gas firstly flows downwards and finally flows into the outlet unit channel.
And a mass transfer piece layer is arranged between the washing layer and the spraying section, a gas-liquid mass transfer hole is arranged on the mass transfer piece layer, and the gas-liquid mass transfer hole is a through hole with a sawtooth-shaped inner edge line, so that the gas-liquid mass transfer efficiency can be improved.
The mass transfer member layer may also be a packing.
The mass transfer member layer may be provided as a single layer or as multiple layers to ensure adequate absorption of high concentrations of contaminants.
Has the advantages that:
the utility model discloses flue gas purification tower utilizes and handles different concentration SO through set up central air current passageway at the spraying section2The required amount of the slurry is different, two working states of the flue gas purification tower are formed, and the flue gas with large fluctuation range of pollutants is convenient to treat. The utility model discloses technical scheme is simple, and the construction degree of difficulty is little, and investment cost is low, can be used to old tower transformation project, also can be used to newly-built project.
Drawings
FIG. 1 is a schematic elevation view of a flue gas cleaning column for treating low concentration contaminants;
FIG. 2 is a schematic elevation view of a flue gas cleaning column for treating high concentrations of contaminants;
FIG. 3 is a schematic view showing the arrangement of the spraying apparatus in example 1;
FIG. 4 is a schematic elevation view of a flue gas purification column in example 2;
FIG. 5 is a schematic view showing the arrangement of the spraying apparatus in example 2;
FIG. 6 is a schematic view of the central gas flow passage of the embodiment 1-2.
Detailed Description
In order to clarify the technical solution and the working principle of the present invention, the present invention is further described with reference to the accompanying drawings and specific embodiments.
Example 1:
the sulfur tail gas purifying tower comprises a tower body, wherein a flue gas inlet 6 is arranged at the lower part of the tower body, a flue gas outlet 1 is arranged at the upper part of the tower body, and a demister 2, a flue gas washing layer 3, a mass transfer part layer 4, a spraying section and a slurry pool are sequentially arranged inside the tower body from top to bottom.
As shown in fig. 1 and 2, the slurry height in the tower body has two working states of low liquid level and high liquid level, when sulfur tail gas discharged under normal working conditions is treated, only the flue gas washing layer 3 sprays absorption liquid, and the slurry height in the slurry tank is low liquid level; when sulfur tail gas discharged under the working conditions of stopping and purging and the bypass working conditions is treated, the flue gas washing layer 3 and the spraying section spray absorption liquid simultaneously, and the height of the slurry in the slurry tank is high.
And a central air flow channel 5 which is communicated up and down is arranged in the middle of the spraying section, and a space is reserved between the outer side wall of the central air flow channel 5 and the inner side wall of the tower body to form an annular air flow channel. The spraying devices of the spraying section are arranged on the inner wall of the tower body and are distributed uniformly in an annular shape, and the absorption liquid is sprayed to the smoke in the annular airflow channel.
The top opening of the central gas flow channel 5 is positioned below the mass transfer member 4, and the bottom opening of the central gas flow channel 5 is higher than the low liquid level and lower than the high liquid level.
The cross section of the central air flow channel is an equilateral triangle in the top effect drawing. As shown in fig. 3, the annular airflow channel is divided into three unit channels by three longitudinal partitions, one end of each longitudinal partition is connected with the inner side wall of the tower body, and the other end of each longitudinal partition is connected with the corner of the central airflow channel 5.
The three unit channels comprise an outlet unit channel 704, an inlet unit channel 702 and a middle unit channel 703, the tops of the inlet unit channel 702 and the middle unit channel 703 are closed from above by cover plates (804, 805), and the bottom of the inlet unit channel 702 is communicated with the flue gas inlet 6. Meanwhile, a gap 705 is arranged at the top of a partition plate 801 for separating the inlet unit channel 702 from the middle unit channel 703, the inlet unit channel 702 is communicated with the middle unit channel 703 through the gap 705, and the height of the bottom end of the partition plate 801 is lower than the high liquid level; the top end of a partition 802 separating the middle unit channel 703 and the outlet unit channel 704 is connected with the cover plate, the bottom of the partition 802 is provided with a notch 706, the middle unit channel 703 and the outlet unit channel 704 are communicated through the notch 706, and the height of the notch 706 is higher than the high liquid level; the top end of the partition separating the inlet unit channel 702 and the outlet unit channel 704 is connected to the cover plate, and the bottom end is at a height lower than the high liquid level.
The mass transfer piece layer 4 is a baffle plate arranged between the washing layer 3 and the spraying section, and a gas-liquid mass transfer hole is arranged on the baffle plate and is a through hole with a sawtooth-shaped inner edge line. The mass transfer component layer 4 can further break up liquid drops and disturb air flow, so that the liquid drops are dispersed into finer fog drops, and the liquid drops can be in more sufficient contact with gas, thereby further improving the absorption efficiency. The mass transfer elements 4 may be arranged in a single layer or in multiple layers, depending on the concentration of contaminants in the flue gas.
As shown in FIG. 1, SO is used in normal operating conditions2When the concentration is lower during the operating mode, the required absorption liquid volume of purification tower is less, only control the shower nozzle work of scrubbing layer 3 can, the thick liquid level is less than central gas flow channel's bottom, and the flue gas flows into the tower from flue gas entry 6 in, can go upward at the inside and outside of central gas flow channel 5 and flow, contacts the reaction at the absorption liquid that mass transfer spare layer 4 and scrubbing layer 3 sprayed, discharges to exhanst gas outlet 1 after demister 2 dewaters again.
As shown in fig. 2, in the parking purging operating mode and the bypass operating mode, the spray head of the washing layer 3 and the spraying device of the spraying section are simultaneously opened, the slurry level is higher than the bottom end of the central gas flow channel, and submerges the bottom end of the central gas flow channel, and the flue gas flows into the tower from the flue gas inlet 6 and only flows in an S-shape in the outer side of the central gas flow channel 5, i.e. the annular gas flow channel (the flue gas entering the tower body from the flue gas inlet sequentially passes through the inlet unit channel, the middle unit channel and the outlet unit channel). In the working state, the spraying device is started, the smoke firstly reacts with the absorption liquid fog drops of the spraying section and then rises to the mass transfer part layer 4 to be further purified, so that high-concentration pollutants can be fully absorbed, and the emission standard is met.
The thick liquid level difference when this embodiment utilizes different operating modes, when handling high concentration pollutant flue gas, seals central air current passageway 5, with flue gas propelling movement week side, can ensure the flue gas and the absorption liquid of spraying section abundant contact, compares in prior art, has overcome tower body central point position flue gas and the insufficient problem of absorption liquid contact reaction.
Example 2:
unlike embodiment 1, in this embodiment, the spraying device is installed on the outer side wall of the central airflow channel 5, and the absorption liquid is sprayed to the flue gas in the annular airflow channel. Meanwhile, a slurry conveying pipeline matched with the spraying device is made of a rigid material, the spraying device is connected with an external slurry conveying system through a liquid conveying pipeline, and the slurry conveying pipeline is embedded on the wall surface of the central airflow channel and serves as a longitudinal supporting member of the central airflow channel.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration only, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims, specification and equivalents thereof.
Claims (7)
1. A sulfur tail gas purification tower comprises a tower body, wherein a flue gas inlet (6) is formed in the lower portion of the tower body, a flue gas outlet (1) is formed in the upper portion of the tower body, a demister (2) is arranged in the tower body in front of the flue gas outlet (1), a flue gas washing layer (3) is arranged below the demister (2), and the sulfur tail gas purification tower is characterized in that a spraying section is arranged below the flue gas washing layer (3) in the tower body;
when the washing layer (3) and the spraying section work simultaneously, the liquid level of the slurry pool at the bottom of the tower body adapted to the washing layer is a high liquid level; when only the washing layer (3) works, the liquid level of the slurry pool is a low liquid level, namely, the slurry in the tower body has two working states of a low liquid level and a high liquid level;
a central air flow channel (5) which is communicated up and down is arranged in the middle of the spraying section, and a space is reserved between the outer side wall of the central air flow channel (5) and the inner side wall of the tower body to form an annular air flow channel;
the top opening of the central airflow channel (5) is positioned below the washing layer (3), and the bottom opening is higher than the low liquid level and lower than the high liquid level;
the annular airflow channel is divided into a plurality of unit channels by longitudinal clapboards and comprises an outlet unit channel, an inlet unit channel and a middle unit channel, the tops of the inlet unit channel and the middle unit channel are sealed by cover plates, and the inlet unit channel is communicated with the flue gas inlet (6);
except for the outlet unit channel and the inlet unit channel, other adjacent unit channels are communicated through the notches on the longitudinal partition plates, the notches on the adjacent longitudinal partition plates are arranged in a vertically staggered manner, the height of the lower notch is higher than the high liquid level, and the bottom end of the partition plate with the upper notch is lower than the high liquid level; the bottom end of the partition plate between the outlet unit channel and the inlet unit channel is lower than the high liquid level, and the top end of the partition plate is connected with the cover plate.
2. The sulfur tail gas purification tower according to claim 1, wherein the spraying devices of the spraying section are distributed around the outer side wall of the central gas flow channel or the inner side wall of the tower body corresponding to the central gas flow channel, and spray the absorption liquid to the flue gas in the annular gas flow channel.
3. The sulfur tail gas purification tower according to claim 2, wherein the spraying device is installed on the outer side wall of the central gas flow channel and connected with an external slurry conveying system through a liquid conveying pipeline, and the liquid conveying pipeline is made of a rigid material and embedded on the wall surface of the central gas flow channel to serve as a longitudinal supporting member of the central gas flow channel.
4. The sulfur tail gas purification tower according to claim 1, wherein the cross section of the central gas flow channel (5) is a regular polygon, one end of the longitudinal partition is connected with the inner side wall of the tower body, and the other end of the longitudinal partition is connected with the corner of the central gas flow channel (5), so that the annular gas flow channel is divided into a corresponding number of channels.
5. The sulfur tail gas purification tower according to claim 1, wherein a mass transfer member layer (4) is arranged between the washing layer (3) and the spraying section, and gas-liquid mass transfer holes are arranged on the mass transfer member layer (4), and are through holes with sawtooth-shaped inner edge lines.
6. The sulfur tail gas purification tower according to claim 1, wherein a mass transfer member layer (4) is arranged between the washing layer (3) and the spraying section, and the mass transfer member layer (4) is a filler.
7. A sulphur tail gas purification column according to claim 5 or 6, wherein the mass transfer member layer (4) is single-layer or multi-layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921856929.9U CN211025809U (en) | 2019-10-31 | 2019-10-31 | Sulfur tail gas purifying tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921856929.9U CN211025809U (en) | 2019-10-31 | 2019-10-31 | Sulfur tail gas purifying tower |
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| Publication Number | Publication Date |
|---|---|
| CN211025809U true CN211025809U (en) | 2020-07-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921856929.9U Active CN211025809U (en) | 2019-10-31 | 2019-10-31 | Sulfur tail gas purifying tower |
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| Country | Link |
|---|---|
| CN (1) | CN211025809U (en) |
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2019
- 2019-10-31 CN CN201921856929.9U patent/CN211025809U/en active Active
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