CN213790830U - Wet desulphurization absorption tower - Google Patents
Wet desulphurization absorption tower Download PDFInfo
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- CN213790830U CN213790830U CN202022540765.8U CN202022540765U CN213790830U CN 213790830 U CN213790830 U CN 213790830U CN 202022540765 U CN202022540765 U CN 202022540765U CN 213790830 U CN213790830 U CN 213790830U
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- flue gas
- atomizing nozzle
- absorption tower
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Abstract
The utility model discloses a wet flue gas desulfurization absorption tower, spray female pipe and set up spray branch pipe in a plurality of towers in the tower body outside tower body, tower, wherein, the side of tower body is provided with the flue gas entry, all is connected with a plurality of high-efficient atomizing nozzle on the spray branch pipe in each tower, and the thick liquid export of tower body bottom is linked together through thick liquid circulating pump and the outer spray female pipe in tower, wherein, high-efficient atomizing nozzle's operating pressure is less than 60kPa, and high-efficient atomizing nozzle's flow is less than 30m3H, the absorption column does notThe device can only reduce the lift of the slurry circulating pump to realize energy-saving operation, can also improve the nozzle arrangement quantity and spray slurry coverage rate, improve the desulfurization efficiency, and simultaneously can avoid the problems of difficult arrangement of the nozzles in the tower, flue gas escape and scouring of the main pipe, which are caused by the large-diameter spraying of the main pipe.
Description
Technical Field
The utility model belongs to the technical field of wet flue gas desulfurization, a wet flue gas desulfurization absorption tower is related to.
Background
Along with the strictness of environmental protection policies of various regions in recent years, all coal-fired boilers with modification conditions in China are required to strive for realizing ultralow emission, for example, the emission concentrations of smoke dust, sulfur dioxide and nitrogen oxides are respectively not higher than 10 mg/cubic meter, 35 mg/cubic meter and 50 mg/cubic meter under the condition that the standard oxygen content is 6% as required by the thermal power industry. The domestic coal-fired boiler flue gas desulfurization mostly adopts a wet desulfurization technology (about 90 percent), so the ultralow emission of sulfur dioxide is mainly realized by carrying out ultralow emission modification on a wet desulfurization system.
The core equipment of the wet desulphurization system is an absorption tower device, and the arrangement and the operation mode of the spraying layer and the nozzles thereof directly influence the desulphurization efficiency of the absorption tower device. In recent years, most of ultra-low emission reconstruction is to realize ultra-low emission of sulfur dioxide by improving the total spraying amount of an absorption tower device of an original desulfurization system, and because the height and the space of a desulfurization tower body of the original desulfurization system are limited, the ultra-low emission reconstruction can only adopt high pressure (more than 80 kpa) and large flow (45 m)3More than h) the spray nozzle is realized by simply increasing the spraying amount of a single-layer spraying layer. The mode exists inThe lower problem, the great influence of these problems has sprayed the layer and even the safe, economy and the high-efficient operation of absorption tower device, has restricted the further promotion of absorption tower device desulfurization efficiency even:
1) the single-layer spraying layer flow is increased, the pipe diameter of a spraying main pipe in the corresponding spraying layer tower is increased, the arrangement of the large-caliber spraying main pipe in the tower inevitably occupies the arrangement space of spraying regional nozzles in the tower, and the arrangement difficulty of the nozzles is increased. Meanwhile, flue gas short circuit easily occurs on two sides of the large-diameter spraying main pipe, and spraying slurry is easy to directly wash the main pipe.
2) High-pressure (more than 80 kpa) and large-flow nozzle (45 m)3More than h), on one hand, the lifting height and the operation energy consumption of the slurry circulating pump are high; on the other hand, the arrangement uniformity of the nozzles in the tower is poor, the non-uniformity of the spraying slurry further causes the non-uniform distribution of the flue gas, certain negative effects on the desulfurization efficiency are also generated, and even the waste of the spraying slurry is caused.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a wet flue gas desulfurization absorption tower, this absorption tower not only can reduce the lift of thick liquid circulating pump and realize energy-conserving operation, can also improve the nozzle and arrange quantity and spray the thick liquid coverage, improves desulfurization efficiency, can avoid the major diameter to spray the problem that difficult, flue gas escape and female pipe erodeed is arranged to the interior nozzle of tower that female pipe caused simultaneously.
In order to achieve the above object, the wet desulfurization absorption tower include that tower body, tower arrange the spray header of female pipe, tower interior arrangement little flow, the high-efficient spray nozzle's of low pressure spray branch pipe outward, wherein, the side of tower body is provided with the flue gas entry, all is connected with a plurality of high-efficient spray nozzles on the spray header in each tower, and the thick liquid of tower body bottom is linked together through the female pipe that sprays that slurry circulating pump and tower were arranged outward, wherein, high-efficient spray nozzle's operating pressure is less than 60kPa, and high-efficient spray nozzle's flow is less than 30m3/h。
The spray branch pipes in each tower are divided into a plurality of groups, wherein the spray branch pipes in each group of towers are sequentially distributed from top to bottom.
The spray branch pipes in each tower in the same group are distributed in parallel and at equal intervals.
All the small-flow, low-pressure and high-efficiency atomizing nozzles on the spraying branch pipes in the same tower are uniformly distributed.
The number of the spraying main pipes outside the tower is 1.
The number of the spraying main pipes outside the tower is more than or equal to 2.
The utility model discloses following beneficial effect has:
wet flue gas desulfurization absorption tower when concrete operation, adopt external female pipe that sprays, the mode of built-in spray branch pipe, it arranges the space to occupy the nozzle in the absorption tower to solve female pipe that sprays, the uniformity is arranged to the nozzle poor, female pipe both sides of spraying easily take place the flue gas short circuit and cause desulfurization inefficiency scheduling problem, avoid the major diameter to spray female pipe easily in the tower by spraying the thick liquid and erode cracked problem simultaneously, improve equipment operation's security, in addition, all be connected with a plurality of high-efficient atomizing nozzle on the branch pipe in the tower, high-efficient atomizing nozzle's operating pressure is less than 60kPa, high-efficient atomizing nozzle's flow is less than 30m3The work pressure of the atomizing nozzle is low, the lift of a slurry circulating pump can be obviously reduced, and the energy consumption is reduced; the working flow is small, the arrangement number of the nozzles can be increased by 50% under the condition that the total spraying amount of the single layer is not changed, and the spraying coverage rate and the desulfurization efficiency are obviously improved.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a cross-sectional view of the present invention.
Wherein, 1 is a tower body, 2 is a slurry circulating pump, 3 is a high-efficiency atomizing nozzle, 4 is a flue gas inlet, 5 is a main spraying pipe outside the tower, and 6 is a branch spraying pipe inside the tower.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1 and 2, the wet desulfurization absorption tower of the present invention comprises a tower body 1, a main spray pipe 5 outside the tower and a plurality of spray branch pipes 6 arranged in the tower body 1, wherein the side of the tower body 1 is provided with a flue gas inlet 4, and each towerAll be connected with a plurality of high-efficient atomizing nozzle 3 on the interior spray branch 6, the thick liquid export of tower body 1 bottom is linked together through thick liquid circulating pump 2 and outer spray header 5 of tower, wherein, high-efficient atomizing nozzle 3's operating pressure is less than 60kPa, and high-efficient atomizing nozzle 3's flow is less than 30m3/h。
The spray branch pipes 6 in each tower are divided into a plurality of groups, wherein the spray branch pipes 6 in each group of towers are sequentially distributed from top to bottom, the spray branch pipes 6 in each tower in the same group are distributed in parallel and at equal intervals, and the high-efficiency atomizing nozzles 3 on the spray branch pipes 6 in the same tower are uniformly distributed.
The utility model discloses a concrete working process does:
the slurry circulating pump 2 extracts limestone slurry in the slurry tank of the absorption tower to the spraying main pipe 5 outside the tower, and then the limestone slurry is atomized by the spraying branch pipe 6 in the tower and the high-efficiency atomizing nozzle 3 to form a uniform atomized slurry layer with high coverage rate, so that the flue gas entering from the flue gas inlet 4 is washed to efficiently remove sulfur dioxide.
The utility model discloses a female pipe that sprays is arranged outside the tower, only arranges even little branch pipe that sprays in the tower to showing the flexibility of arranging, arranging quantity that improves high-efficient atomizing nozzle 3, the nozzle is arranged also more evenly, improves desulfurization efficiency, avoids the female pipe of major diameter to be washed away by the nozzle on every side in the tower easily and breaks the problem that causes equipment trouble simultaneously.
Meanwhile, the high-efficiency atomizing nozzle 3 has low working pressure, can obviously reduce the lift of the slurry circulating pump 2 and has low energy consumption; the working flow is small, the arrangement quantity of the high-efficiency atomizing nozzles 3 can be increased by 50 percent under the condition that the total flow of the single-layer spraying layer is not changed, and the spraying coverage rate and the desulfurization efficiency are obviously improved.
The number of the spraying main pipes 5 outside the tower can be 1 or more for absorption towers with different diameters and spaces arranged in the tower.
The spray layer embodiment that sprays that the female pipe of spraying is external and adopt the low pressure low discharge nozzle does the utility model discloses a preferred embodiment, not be used for the restriction the utility model discloses, spray that the female pipe is external arrange, adopt low pressure (below 60 kpa), little flow (30 m)3Below/h) nozzle may be modified, improved or equivalently replaced within the principles of the inventionAnd (4) changing.
Claims (6)
1. The utility model provides a wet flue gas desulfurization absorption tower, a serial communication port, spray branch pipe (6) in a plurality of towers including tower body (1), the outer spray header (5) of tower and setting up in tower body (1), wherein, the side of tower body (1) is provided with flue gas entry (4), all is connected with a plurality of high-efficient atomizing nozzle (3) on each tower spray branch pipe (6), and the thick liquid of tower body (1) bottom is linked together through thick liquid circulating pump (2) and the outer spray header (5) of tower, wherein, the operating pressure of high-efficient atomizing nozzle (3) is less than 60kPa, and the flow of high-efficient atomizing nozzle (3) is less than 30m3/h。
2. The absorption tower according to claim 1, wherein each group of spray branch pipes (6) is divided into a plurality of groups, and the spray branch pipes (6) in each group are distributed from top to bottom.
3. The wet desulfurization absorption tower according to claim 2, wherein the spray branch pipes (6) in each tower in the same group extend from the outside of the tower to the inside of the tower.
4. The absorption tower according to claim 2, wherein the high-efficiency atomizing nozzles (3) on the spray branch pipes (6) in the same tower are uniformly distributed.
5. The wet desulfurization absorption tower according to claim 1, wherein the number of the spray header pipes (5) outside the tower is 1.
6. The wet desulphurization absorption tower according to claim 1, wherein the number of the spraying mother pipes (5) outside the tower is more than or equal to 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022540765.8U CN213790830U (en) | 2020-11-05 | 2020-11-05 | Wet desulphurization absorption tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022540765.8U CN213790830U (en) | 2020-11-05 | 2020-11-05 | Wet desulphurization absorption tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213790830U true CN213790830U (en) | 2021-07-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022540765.8U Active CN213790830U (en) | 2020-11-05 | 2020-11-05 | Wet desulphurization absorption tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213790830U (en) |
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2020
- 2020-11-05 CN CN202022540765.8U patent/CN213790830U/en active Active
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