CN205095635U - Can realize sea water desulphurization unit of ultra -clean emission - Google Patents
Can realize sea water desulphurization unit of ultra -clean emission Download PDFInfo
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- CN205095635U CN205095635U CN201520896828.XU CN201520896828U CN205095635U CN 205095635 U CN205095635 U CN 205095635U CN 201520896828 U CN201520896828 U CN 201520896828U CN 205095635 U CN205095635 U CN 205095635U
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- seawater
- sea water
- aeration
- distributor
- quench water
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- 239000013535 sea water Substances 0.000 title claims abstract description 143
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 39
- 230000023556 desulfurization Effects 0.000 claims abstract description 39
- 238000005273 aeration Methods 0.000 claims abstract description 34
- 239000003546 flue gas Substances 0.000 claims abstract description 30
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 230000007246 mechanism Effects 0.000 claims abstract description 15
- 239000007789 gas Substances 0.000 claims abstract description 14
- 239000000945 filler Substances 0.000 claims abstract description 9
- 230000003647 oxidation Effects 0.000 claims abstract description 8
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 48
- 238000010791 quenching Methods 0.000 claims description 37
- 238000010521 absorption reaction Methods 0.000 claims description 14
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 238000012856 packing Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 5
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 3
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 3
- 239000010962 carbon steel Substances 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 239000004571 lime Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 3
- 239000004568 cement Substances 0.000 claims 1
- 238000010276 construction Methods 0.000 claims 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 10
- 239000000428 dust Substances 0.000 abstract description 5
- 239000005864 Sulphur Substances 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 238000009826 distribution Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 3
- 230000003009 desulfurizing effect Effects 0.000 abstract description 3
- 238000007599 discharging Methods 0.000 abstract description 2
- 235000013547 stew Nutrition 0.000 abstract 1
- 230000000171 quenching effect Effects 0.000 description 14
- 239000003245 coal Substances 0.000 description 7
- 229910052717 sulfur Inorganic materials 0.000 description 7
- 239000011593 sulfur Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 5
- 239000011151 fibre-reinforced plastic Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000009827 uniform distribution Methods 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 241001474374 Blennius Species 0.000 description 1
- 241000238557 Decapoda Species 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model discloses a can realize sea water desulphurization unit of ultra -clean emission, including sea water desulfurizing tower, sea water supply system and sea water aeration systems, the sea water desulfurizing tower includes the tower body, follow supreme sea water discharge port, flue gas entry, air distributor, filler absorbed layer, a plurality of liquid distributor, a plurality of defroster and the exhanst gas outlet of being equipped with down in the tower body, the sea water supply system includes sea water siphon pond and a plurality of seawater booster pumps, every seawater booster pump with sea water siphon pond, liquid distributor connect, sea water aeration systems includes the mixed pond of sea water, sea water aeration tank and the sea water discharging pool that stews, be equipped with oxidation air aeration mechanism of a plurality of group in the sea water aeration tank, be provided with the aeration fan in the oxidation air aeration mechanism of every group. The utility model discloses not only have very high desulfurization efficiency and dust removal performance, the adaptability that has still successfully solved sulphur content is poor, corrosion of equipment, the field distribution of tower internal flow, equipment jam scheduling problem.
Description
Technical Field
The utility model relates to a coal-fired flue gas desulfurization device, concretely relates to can realize seawater desulfurization device of ultra-clean emission.
Background
The coal-fired flue gas contains a large amount of SO2Smoke dust, small amount of HCl, HF and SO3And pollutants such as heavy metals and the like are one of main factors causing air pollution, and the arrangement of a flue gas desulfurization device is an important means for controlling the sulfide pollution of coal-fired flue gas. At present, the most flue gas desulfurization devices are adopted in the wet flue gas desulfurization, the limestone-gypsum wet method is widely applied in the wet flue gas desulfurization, and the seawater flue gas desulfurization is widely applied to power plants burning low-sulfur coal at home and abroad because of mature technology, simple process and low investment and operation cost.
However, the current seawater desulfurization apparatus has some problems as follows.
1) The adaptability to the sulfur content of the fire coal is poor. DL/T5196-2004 technical Specification for flue gas desulfurization design of thermal power plant: the sulfur content St and ar of the coal used for burning in the power plant adopting the seawater desulfurization process are less than 1.0 percent, and the desulfurization efficiency is not less than 90 percent. However, due to the implementation of new environmental standards and the instability of domestic coal supply markets, the sulfur content of the coal mostly adopting seawater desulfurization process power plants in China cannot be guaranteed to be lower than the design value, and is seriously even 1 time or more higher than the design value. Because of the self limitation of the seawater desulfurization process, the adjustment means of the desulfurization device is limited, thereby causing the desulfurization efficiency and the clean flue gas SO2The concentration or the quality of the discharged seawater can hardly meet the environmental protection requirements.
2) The equipment is severely corroded. Cl in seawater-The content is high and is about 17000-20000 mg/L, and the pH value of the desulfurized seawater is only 2-3 (before aeration), so that the desulfurized seawater has the characteristics of strong acidity, strong corrosivity and the like. In addition, the temperature of the flue gas at the outlet of the absorption tower of the seawater desulfurization system is greatly influenced by the seasonality, particularly the temperature of the flue gas at the outlet of the absorption tower of the northern coastal region is only about 10 ℃ in winter and about 35 ℃ in summer, and particularly the temperature at the outlet of the desulfurization device in winter is far lower than the acid dew point temperature, so that the flue gas is extremely easy to corrode downstream equipment, including equipment such as the inner wall of the absorption tower, GGH, a flue, a seawater discharge pipeline of the absorption tower, a chimney and the like.
3) The flow field distribution in the absorption tower is uneven. Most of seawater desulfurization processes adopt a packed tower, and are influenced by a flue gas flow field at an inlet of an absorption tower, a packing layer in the tower becomes uneven in thickness due to the influence of air flow distribution and seawater flow, and even a large 'vortex' appears in a serious place. The flue gas resistance is low, and the flue gas is easy to flow through the area, so that the flue gas short circuit phenomenon is generated, and the desulfurization efficiency is seriously influenced.
4) The seawater organisms easily block the equipment. Seawater contains a large amount of seaorganisms such as shells, seaweeds, fish and crabs, and in order to prevent the seawater organisms from blocking the desulfurization equipment, a seawater flue gas desulfurization device is generally provided with a filter screen at a forebay. If the aperture of the filter screen is too large, marine organisms can penetrate through the filter screen to block the spray pipe and the spray opening and are easy to accumulate in the packing layer; if the aperture of the filter screen is too small, the seawater organisms can block the filter screen of the forebay, and even cause the water level at the suction side of the seawater booster pump to alarm when the aperture is serious, so that the seawater booster pump can be protected.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in providing a can realize seawater desulphurization unit of ultra-clean emission, it not only has very high desulfurization efficiency and dust removal performance, has still successfully solved poor, the equipment corrosion of adaptability, the flow field distribution in the tower of sulphur branch, equipment jam scheduling problem.
The utility model provides a technical scheme that its technical problem adopted is:
provided is a seawater desulfurization apparatus capable of achieving ultra-clean discharge, the apparatus including: the seawater desulfurization tower, the seawater supply system and the seawater aeration system; wherein,
the seawater desulfurization tower comprises a tower body, wherein a gas distributor, a filler absorption layer, a plurality of liquid distributors and a plurality of demisters are sequentially arranged in the tower body from bottom to top;
the seawater supply system comprises a seawater siphon pool and a plurality of seawater booster pumps, wherein the seawater siphon pool is connected with external seawater, an inlet pipeline of each seawater booster pump is connected with the seawater siphon pool, and an outlet pipeline of each seawater booster pump is connected with the liquid distributor;
the seawater aeration system comprises a seawater mixing tank, a seawater aeration tank and a seawater standing discharge tank which are arranged along the water flow direction, wherein the seawater mixing tank is connected with an external seawater and seawater discharge port, a seawater mixing mechanism is arranged in the seawater mixing tank, a plurality of groups of oxidation air aeration mechanisms are arranged in the seawater aeration tank, each group of oxidation air aeration mechanisms is provided with an aeration fan, and the seawater standing discharge tank is connected with external seawater.
According to the technical scheme, the gas distributor is a herringbone grating which is connected into a whole.
According to the technical scheme, Q-PACK random packing is filled in the packing absorption layer.
According to the technical scheme, the liquid distributor is a pipe network type spraying distributor.
According to the technical scheme, the gas distributor is made of FRP (fiber reinforced plastic), the filler absorption layer is made of plastic, and the liquid distributor is made of FRP.
According to the technical scheme, the tower body is of a carbon steel or concrete structure, and glass flake daub is lined on the inner surface of the tower body.
According to the technical scheme, the seawater siphon pool is internally provided with the large-aperture filter screen, and the outlet pipeline of the seawater booster pump is provided with the small-aperture filter screen.
According to the technical scheme, an adding mechanism for adding lime or caustic soda is arranged in the seawater siphon pool.
According to above-mentioned technical scheme, the device still includes quench water system, quench water system includes quench water tank and quench water distributor, quench water tank sets up the top at the tower body, quench water tank passes through quench water pipeline and is connected with quench water distributor, quench water distributor sets up at flue gas entrance, the last quench water control valve that is equipped with of quench water pipeline.
The utility model discloses, following beneficial effect has: the device provides absorbent for the seawater desulfurization tower by arranging a seawater supply system, ensures the uniform distribution of flue gas in the tower by arranging a gas distributor and a filler absorption layer in the tower body, and further ensures the uniform distribution of liquid of the filler by a liquid distributor, thereby successfully solving the uniform distribution problem of a flow field in the tower, and enabling the desulfurization mass transfer to be realizedThe efficiency is improved by 30 percent, the pressure drop of the flue gas is reduced by 40 percent, the energy consumption of the device is greatly reduced while the desulfurization efficiency is improved, the adaptability of the device to the change of the sulfur content of the coal is greatly improved, and the seawater after the flue gas is washed and the fresh seawater are mixed, aerated and stood by a seawater aeration system and can be directly discharged into the sea; in addition, the device can flexibly select the starting number of the liquid distributor and the seawater booster pump according to the change of the load and the sulfur content of the device, thereby further improving the adaptability of the device to the change of the sulfur content of the fire coal; at the same time. The utility model discloses a desulfurization efficiency is super high 99%, and dust collection efficiency reaches more than 90%, and the smoke and dust content of export can reduce to 5mg/Nm3The ultra-clean emission of the desulfurized flue gas is realized.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a seawater desulfurization tower with a quench water system according to the present invention;
FIG. 3 is a schematic structural view of a chilled water distributor according to the present invention;
FIG. 4 is a side view of a chilled water dispenser of the present invention;
FIG. 5 is a schematic view of the gas distributor according to the present invention;
FIG. 6 is a schematic view of a liquid distributor according to the present invention;
FIG. 7 is a schematic view of the seawater aeration system of the present invention;
fig. 8 is a top view of fig. 7.
In the figure: 1, a tower body; 2-a seawater siphon pool; 3-seawater booster pump; 4-a seawater mixing tank; 5-a seawater aeration tank; 6-seawater standing and discharging pool; 7-aeration fan; 8-seawater discharge port; 9-flue gas inlet; 10-a gas distributor; 11-a filler-absorbing layer; 12-a liquid distributor; 13-a demister; 14-a washing water pump; 15-flue gas outlet; 16-chilled water distributor; 17-quick cooling water tank; 18-chilled water control valve; 19-oxidizing air aeration means; 20- -seawater mixing mechanism.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
In a preferred embodiment of the present invention, as shown in fig. 1, fig. 2, fig. 7 and fig. 8, a seawater desulfurization apparatus capable of achieving ultra-clean discharge comprises: the seawater desulfurization tower, the seawater supply system and the seawater aeration system; wherein,
as shown in fig. 1 and 2, the seawater desulfurization tower is a filler absorption tower, the seawater desulfurization tower comprises a tower body 1, a gas distributor 10, a filler absorption layer 11, a plurality of liquid distributors 12 and a plurality of demisters 13 are sequentially arranged in the tower body 1 from bottom to top, a seawater discharge port 8 is arranged at the bottom of the tower body 1, a flue gas inlet 9 is arranged below the gas distributor 10 in the middle of the tower body 1, and a flue gas outlet 15 is arranged at the top of the tower body 1;
as shown in fig. 1, the seawater supply system comprises a seawater siphon pool 2 and a plurality of seawater booster pumps 3 (1-4), wherein the seawater siphon pool 2 is connected with external seawater, an inlet pipeline of each seawater booster pump 3 is connected with the seawater siphon pool 2, and an outlet pipeline is connected with a liquid distributor 12;
as shown in fig. 1, 7 and 8, the seawater aeration system comprises a seawater mixing tank 4, a seawater aeration tank 5 and a seawater standing discharge tank 6 which are arranged along the water flow direction, wherein the seawater mixing tank 4 is connected with an external seawater and seawater discharge port 8, a seawater mixing mechanism 20 is arranged in the seawater mixing tank 4, a plurality of groups (1-5 groups) of oxidation air aeration mechanisms 19 are arranged in the seawater aeration tank 5, each group of oxidation air aeration mechanisms 19 is provided with an aeration fan 7, and the seawater standing discharge tank 6 is connected with external seawater.
In a preferred embodiment of the present invention, as shown in fig. 5, the gas distributor 10 is a herringbone grid that is integrated.
In the preferred embodiment of the present invention, the packing absorbing layer is filled with Q-PACK random packing.
In a preferred embodiment of the present invention, as shown in fig. 6, the liquid distributor 12 is a pipe-grid spray distributor. Wherein the number of liquid distributors is 1-4 groups.
In the preferred embodiment of the present invention, the material of the gas distributor is FRP, the material of the filler absorption layer is plastic, and the material of the liquid distributor is FRP. The tower body is of a carbon steel or concrete structure, and the inner surface of the tower body is lined with glass flake daub. The arrangement of the anti-corrosion lining in the tower body and the selection of other non-metallic materials of parts solve the problem of serious corrosion of the seawater desulfurizing tower, and improve the operation period and the service life of the device.
In the preferred embodiment of the present invention, as shown in fig. 1, a large-aperture filter net is disposed in the seawater siphon 2, and a small-aperture filter net is disposed on the outlet pipeline of the seawater booster pump. The two-stage filter screen with the size and the size capable of being cleaned on line can solve the problem that seawater organisms block equipment in the tower, and the running reliability of the equipment is improved.
The utility model discloses a preferred embodiment, be equipped with the interpolation mechanism that is used for adding lime or caustic soda in the sea water siphon pond, can be according to the device load and the quantity of the change adjustment additive of sulphur content, fundamentally solves the device to the undulant adaptability of sulphur content.
In the preferred embodiment of the present invention, as shown in fig. 1-4, the apparatus further comprises a quenching water system, the quenching water system comprises a quenching water tank 17 and a quenching water distributor 16, the quenching water tank 17 is disposed at the top of the tower body 1, the quenching water tank 1 is connected to the quenching water distributor 16 through a quenching water pipe, the quenching water distributor 16 is disposed at the flue gas inlet 9, and a quenching water control valve 18 is disposed on the quenching water pipe. When the smoke temperature at the smoke inlet is ultrahigh, the quenching water control valve 18 is automatically opened, and the quenching water tank 17 sprays water into the flue through the quenching water distributor 16 to reduce the temperature. The emergency cooling water tank can be connected with a seawater booster pump.
The utility model discloses in, as shown in fig. 2, the below of every defroster all is equipped with wash pipe and is used for washing the defroster, and wash pipe passes through wash water pump 14 and is connected with sea water siphon pond.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.
Claims (9)
1. A seawater desulfurization apparatus capable of achieving ultra-clean discharge, comprising: the seawater desulfurization tower, the seawater supply system and the seawater aeration system; wherein,
the seawater desulfurization tower comprises a tower body, wherein a gas distributor, a filler absorption layer, a plurality of liquid distributors and a plurality of demisters are sequentially arranged in the tower body from bottom to top;
the seawater supply system comprises a seawater siphon pool and a plurality of seawater booster pumps, wherein the seawater siphon pool is connected with external seawater, an inlet pipeline of each seawater booster pump is connected with the seawater siphon pool, and an outlet pipeline of each seawater booster pump is connected with the liquid distributor;
the seawater aeration system comprises a seawater mixing tank, a seawater aeration tank and a seawater standing discharge tank which are arranged along the water flow direction, wherein the seawater mixing tank is connected with an external seawater and seawater discharge port, a seawater mixing mechanism is arranged in the seawater mixing tank, a plurality of groups of oxidation air aeration mechanisms are arranged in the seawater aeration tank, each group of oxidation air aeration mechanisms is provided with an aeration fan, and the seawater standing discharge tank is connected with external seawater.
2. The apparatus of claim 1, wherein the gas distributor is an integral chevron grid.
3. The apparatus of claim 1, wherein the filler-absorbing layer is filled with Q-PACK random packing.
4. The apparatus of claim 1, wherein the liquid distributor is a pipe-grid spray distributor.
5. The apparatus of claim 1, wherein the material of the gas distributor is FRP, the material of the filler-absorbing layer is plastic, and the material of the liquid distributor is FRP.
6. The apparatus of claim 1, wherein the tower body is of carbon steel or concrete construction and is lined on its inside with glass flake cement.
7. The device as claimed in claim 1, wherein a large-aperture filter screen is arranged in the seawater siphon pool, and a small-aperture filter screen is arranged on an outlet pipeline of the seawater booster pump.
8. The device as claimed in claim 1, wherein an adding mechanism for adding lime or caustic soda is arranged in the seawater siphon basin.
9. The apparatus of claim 1, further comprising a quench water system, wherein the quench water system comprises a quench water tank and a quench water distributor, the quench water tank is disposed at the top of the tower body, the quench water tank is connected with the quench water distributor through a quench water pipe, the quench water distributor is disposed at the flue gas inlet, and a quench water control valve is disposed on the quench water pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520896828.XU CN205095635U (en) | 2015-11-11 | 2015-11-11 | Can realize sea water desulphurization unit of ultra -clean emission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520896828.XU CN205095635U (en) | 2015-11-11 | 2015-11-11 | Can realize sea water desulphurization unit of ultra -clean emission |
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| CN205095635U true CN205095635U (en) | 2016-03-23 |
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| CN201520896828.XU Active CN205095635U (en) | 2015-11-11 | 2015-11-11 | Can realize sea water desulphurization unit of ultra -clean emission |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107308813A (en) * | 2017-08-09 | 2017-11-03 | 成都中祥天宇环保科技有限公司 | A kind of desulfurizing tower of radial direction circulation flue gas |
| CN110449005A (en) * | 2019-07-30 | 2019-11-15 | 上海蓝魂环保科技有限公司 | A kind of ship sea water desulfuration spray column |
-
2015
- 2015-11-11 CN CN201520896828.XU patent/CN205095635U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107308813A (en) * | 2017-08-09 | 2017-11-03 | 成都中祥天宇环保科技有限公司 | A kind of desulfurizing tower of radial direction circulation flue gas |
| CN110449005A (en) * | 2019-07-30 | 2019-11-15 | 上海蓝魂环保科技有限公司 | A kind of ship sea water desulfuration spray column |
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