CN113082995A - Dry desulfurization device - Google Patents
Dry desulfurization device Download PDFInfo
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- CN113082995A CN113082995A CN202110526185.XA CN202110526185A CN113082995A CN 113082995 A CN113082995 A CN 113082995A CN 202110526185 A CN202110526185 A CN 202110526185A CN 113082995 A CN113082995 A CN 113082995A
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- reactor
- tube
- flue gas
- outer tube
- inner tube
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 27
- 230000023556 desulfurization Effects 0.000 title claims abstract description 27
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims abstract description 68
- 239000003546 flue gas Substances 0.000 claims abstract description 39
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 37
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims abstract description 34
- 235000017557 sodium bicarbonate Nutrition 0.000 claims abstract description 34
- 238000005303 weighing Methods 0.000 claims abstract description 24
- 239000000843 powder Substances 0.000 claims abstract description 16
- 239000002028 Biomass Substances 0.000 claims description 14
- 239000000779 smoke Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 8
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 abstract description 8
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 abstract description 4
- 239000007795 chemical reaction product Substances 0.000 abstract description 4
- 229910052938 sodium sulfate Inorganic materials 0.000 abstract description 4
- 235000011152 sodium sulphate Nutrition 0.000 abstract description 4
- 235000010265 sodium sulphite Nutrition 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 description 9
- 239000007789 gas Substances 0.000 description 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 239000003463 adsorbent Substances 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/81—Solid phase processes
- B01D53/83—Solid phase processes with moving reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/508—Sulfur oxides by treating the gases with solids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
本发明涉及一种干法脱硫装置，反应器内管两端敞口，作为烟气的进入通道，其顶部竖直向上并套设反应器外管；反应器外管两端封闭，侧壁具有一烟气出口；反应器外管内壁与反应器内管外壁之间具有设定的间距；反应器外管内顶与反应器内管上口具有设定的间距；小苏打粉仓通过称重装置与反应器内管连通。本发明在反应器内设置双回程，这样在不增加反应器高度的情况下，增加其反应的接触时间，使出口SO2超低排放，同时节约了设备投资成本。反应器的外部套管底部和水平呈一定倾斜角，有利于落入底部的反应产物亚硫酸钠、硫酸钠及未反应的小苏打顺利从出口管道流出。整套脱硫装置设备简单，投资成本低；同时耗电设备少，耗电量低，运行成本也低。
The invention relates to a dry desulfurization device. Both ends of the inner tube of the reactor are open to serve as the inlet channel of flue gas, the top of which is vertically upward and the outer tube of the reactor is sleeved; the ends of the outer tube of the reactor are closed, and the side wall has A flue gas outlet; there is a set distance between the inner wall of the outer tube of the reactor and the outer wall of the inner tube of the reactor; the inner top of the outer tube of the reactor and the upper mouth of the inner tube of the reactor have a set distance; the baking soda powder bin passes through the weighing device communicated with the inner tube of the reactor. In the present invention, a double return is arranged in the reactor, so that the contact time of the reaction is increased without increasing the height of the reactor, so that the SO 2 emission at the outlet is ultra-low, and the equipment investment cost is saved at the same time. The bottom of the outer casing of the reactor is inclined at a certain angle to the horizontal, which is conducive to the smooth flow of the reaction products sodium sulfite, sodium sulfate and unreacted baking soda falling into the bottom from the outlet pipe. The whole desulfurization unit has simple equipment and low investment cost; at the same time, it has less power consumption equipment, low power consumption and low operating cost.
Description
Technical Field
The invention relates to a dry desulphurization device, and belongs to the technical field of dry desulphurization.
Background
The dry reaction device is a purification device mainly used for removing sulfur-containing gaseous pollutants in flue gas.
The existing dry-method desulfurization device has the disadvantages of high height required by a reactor, high equipment investment cost, large occupied area and high space layout difficulty; furthermore, the reaction time of baking soda with flue gas in the apparatus is difficult to ensure.
Meanwhile, compared with other boilers such as coal-fired boilers and the like, the biomass boiler has low sulfur content, SO that SO in the tail flue gas of the boiler2And is also relatively low. Aiming at the characteristics of the flue gas of the biomass boiler, how to design a set of desulfurization device with simple structure and economical and practical from the perspective of saving the investment cost of environmental protection under the requirement of adapting to new environmental protection and ultralow emission is a technical problem to be solved urgently in the field.
Disclosure of Invention
The invention aims to provide a dry desulfurization device, wherein an inner pipe and an outer pipe are arranged in a reactor, SO that the contact time of the reaction is increased and the SO at an outlet is ensured without increasing the height of the reactor2The ultra-low emission is achieved, and the equipment investment cost is saved. The bottom of the outer pipe of the reactor forms a small-angle inclination angle with the horizontal direction, which is favorable for the reaction products of sodium sulfite, sodium sulfate and unreacted sodium bicarbonate falling into the bottom to smoothly flow out from the outlet pipeline.
The invention adopts the following technical scheme:
a dry desulphurization device comprises a reactor inner tube 1, a reactor outer tube 2, a baking soda powder bin 3 and a weighing device; the two ends of the reactor inner tube 1 are open and used as an inlet channel of flue gas, and the top of the reactor inner tube is vertically upward and sleeved with the reactor outer tube 2; the two ends of the reactor outer tube 2 are closed, and the side wall of the reactor outer tube is provided with a flue gas outlet; a set distance is reserved between the inner wall of the reactor outer tube 2 and the outer wall of the reactor inner tube 1; the inner top of the reactor outer tube 2 and the upper opening of the reactor inner tube 1 have a set distance; the baking soda powder bin 3 is communicated with the reactor inner tube 1 through the weighing device.
Preferably, the lower part of the reactor inner tube 1 is provided with an elbow which is communicated with a horizontal tube, and the upper part of the horizontal tube is communicated with the weighing device.
Preferably, the weighing device is a weighing screw feeder 4.
Further, the weighing screw feeder 4 is vertically arranged, and the baking soda powder bin 3 at the upper part of the weighing screw feeder is also vertically arranged.
Preferably, the bottom plate of the outer pipe 2 has an inclination angle which inclines downwards towards the flue gas outlet, and the lowest part of the bottom plate is smoothly connected with the bottom wall of the flue gas outlet and is positioned at the same height.
Further, the inclination angle is 3-7 degrees.
Preferably, the reactor inner tube 1 and the reactor outer tube 2 are both square tubes.
Further, the lower part of the baking soda powder bin 3 is conical.
Preferably, the flue gas is low-pollution biomass boiler flue gas.
The invention has the beneficial effects that:
1) the reactor is provided with double return strokes, SO that the contact time of the reaction is increased under the condition of not increasing the height of the reactor, and the outlet SO is enabled2The emission is ultra-low, and the equipment investment cost is saved.
2) The bottom and the horizontal plane of the external sleeve of the reactor form an inclined angle of 3-7 degrees downwards, which is beneficial to the reaction products of sodium sulfite, sodium sulfate and unreacted sodium bicarbonate falling into the bottom to smoothly flow out from the outlet pipeline.
3) Is particularly suitable for low-pollution biomass boiler flue gas.
4) The whole set of desulfurization device is simple in equipment and low in investment cost; meanwhile, the power consumption equipment is less, the power consumption is low, and the operation cost is low.
Drawings
FIG. 1 is a front perspective view of a dry desulfurization apparatus according to the present invention.
Fig. 2 is a top perspective view of fig. 1.
In the figure, 1 is a reactor inner pipe, 2 is a reactor outer pipe, 3 is a baking soda powder bin, and 4 is a weighing screw feeder.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
Referring to fig. 1-2, a dry desulfurization device comprises a reactor inner tube 1, a reactor outer tube 2, a baking soda powder bin 3 and a weighing device 4; the two ends of the reactor inner tube 1 are open and used as an inlet channel of flue gas, and the top of the reactor inner tube is vertically upward and sleeved with the reactor outer tube 2; the two ends of the reactor outer tube 2 are closed, and the side wall of the reactor outer tube is provided with a flue gas outlet; a set distance is reserved between the inner wall of the reactor outer tube 2 and the outer wall of the reactor inner tube 1; the inner top of the reactor outer tube 2 and the upper opening of the reactor inner tube 1 have a set distance; the baking soda powder bin 3 is communicated with the reactor inner pipe 1 through the weighing device 4.
In this embodiment, see fig. 1, the reactor inner tube 1 has a bend in its lower part, via which it communicates with a cross tube, the upper part of which communicates with the weighing device.
In this embodiment, referring to fig. 1, the weighing means is a weighing screw feeder 4.
In this embodiment, see fig. 1, the weighing screw feeder 4 is arranged vertically, as is the baking soda powder bin 3 in its upper part.
In this embodiment, with continued reference to fig. 1, the floor of the outer tube 2 has an inclination that slopes downwardly towards the flue gas outlet, the lowest of which is smoothly connected to and at the same level as the bottom wall of the flue gas outlet.
Preferably, the inclination angle is 3 to 7 °.
In this example, referring to fig. 2, the reactor inner tube 1 and the reactor outer tube 2 are each in the shape of a square tube.
In this embodiment, the lower portion of the baking soda powder bin 3 is tapered, see figure 1.
Preferably, the flue gas is low-pollution biomass boiler flue gas. Compare with other boilers such as coal fired boiler, biomass boiler contains the sulphur content low, and this application is from the angle of practicing thrift environmental protection investment cost, is more applicable to the desulfurization of this flue gas.
The following description is made with reference to specific examples:
1, waste gas source: biomass boiler flue gas
Engineering background: 10t/h biomass boiler flue gas environmental protection island modification project. The engineering adopts baking soda dry flue gas desulfurization, old cloth bag dust removal and SCR denitration.
Exhaust gas to be treated: low polluting biomass boiler flue gas containing SO2＜49ppm(＜140mg/Nm3) The temperature of tail gas is 220 ℃, in order to realize ultralow emission (< 35 mg/Nm)3) The novel efficient SO2 removing device is suitable for new environmental protection requirements, saves environmental protection cost and needs to be developed.
2 problems with existing exhaust systems
Compared with other boilers such as coal-fired boilers, the biomass boiler has low sulfur content, SO that SO in the flue gas2Relatively lower, to the characteristics of biomass boiler flue gas, this embodiment is under the requirement of the ultralow emission of adaptation new environmental protection, from practicing thrift environmental protection investment cost, designs one set of simple structure, economical and practical's desulphurization unit.
3 purpose of transformation
Through a novel dry desulfurization device, tail gas is purified, and meanwhile, the cost is greatly saved on the premise of meeting the environmental protection requirement.
4 the device is characterized in that:
the dry desulfurization scheme is relatively simple in system, less in equipment quantity, free of any wastewater in the dry desulfurization process and small in occupied area. And the wet desulfurization systems commonly used in power plants: the system has the advantages of multiple devices, complex system, large occupied area and large energy consumption, and each device works in a corrosive environment, so that the service life and the performance of the device are easily influenced;
in the case, the vertical double-return dry-type reaction neutralizing tower is adopted, the structure is compact, the occupied area is small, meanwhile, the double-return structural form can ensure that the reaction time of the baking soda and the flue gas is more than 2 seconds, and the deacidification effect of the baking soda is ensured.
The adsorbent in this case is sodium bicarbonate (baking soda, NaHCO)3) As the adsorbent for flue gas desulfurization. It removes acidic pollutant in smoke by chemical adsorption and simultaneously can be communicatedRemoving some inorganic and organic trace substances by physical adsorption.
5 device overview:
the novel dry desulfurization device can realize the ultralow emission of SO2 in tail gas. As shown in fig. 1-2, the apparatus comprises:
reactor inner tube 1: the baking soda enters the inner tube of the reactor along with the flue gas, and SO in the flue gas is removed by reaction in the inner tube2；
Reactor outer tube 2: the flue gas passes through the outer pipe and is fully mixed with the baking soda again to ensure that SO is contained in the flue gas2The further reaction, the bottom of the outer tube and the horizontal plane form an inclination angle of 3-7 degrees, which is beneficial to the reaction products of sodium sulfite, sodium sulfate and unreacted sodium bicarbonate falling into the bottom to smoothly flow out from the outlet pipeline.
Baking soda powder bin 3, weighing screw feeder 4: the amount of the injected baking soda can be adjusted according to a set value, the rotating speed of the baking soda is interlocked with the concentration of the acid gas detected on line, the baking soda can be prevented from being over-injected, and the usage amount of the baking soda is saved.
6, a working process:
low SO content from biomass boilers2The tail gas firstly passes through the inlet section of the inner pipe 1 of the reactor, and at the moment, the weighing screw feeder 4 below the baking soda powder bin 3 receives SO at the outlet of the outer pipe 2 of the reactor2After the concentration value signal is sent, baking soda with a corresponding amount is discharged into an inlet pipeline and enters the reactor inner pipe 1 along with the tail gas of the biomass boiler, the flue gas carries the baking soda upwards in the dry-type reactor inner pipe 1 and then falls down through the reactor outer pipe 2, the gas-solid contact time is prolonged, and SO in the flue gas is enabled to be2Obtain sufficient reaction to ensure that SO at a flue gas outlet2The required value is reached.
While the preferred embodiments of the present invention have been described, those skilled in the art will appreciate that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A dry desulfurization device is characterized in that:
comprises a reactor inner tube (1), a reactor outer tube (2), a baking soda powder bin (3) and a weighing device;
the two ends of the reactor inner tube (1) are open and are used as an inlet channel of flue gas, and the top of the reactor inner tube is vertically upwards and sleeved with the reactor outer tube (2);
the two ends of the reactor outer tube (2) are closed, and the side wall of the reactor outer tube is provided with a flue gas outlet; a set distance is reserved between the inner wall of the reactor outer tube (2) and the outer wall of the reactor inner tube (1); the inner top of the reactor outer tube (2) and the upper opening of the reactor inner tube (1) have a set distance;
the baking soda powder bin (3) is communicated with the reactor inner pipe (1) through the weighing device.
2. The dry desulfurization apparatus according to claim 1, wherein: the lower part of the reactor inner tube (1) is provided with an elbow which is communicated with a horizontal tube, and the upper part of the horizontal tube is communicated with the weighing device.
3. The dry desulfurization apparatus according to claim 1, wherein: the weighing device is a weighing screw feeder (4).
4. The dry desulfurization apparatus according to claim 3, wherein: the weighing screw feeder (4) is vertically arranged, and the baking soda powder bin (3) at the upper part of the weighing screw feeder is also vertically arranged.
5. The dry desulfurization apparatus according to claim 1, wherein: the bottom plate of the outer pipe (2) inclines downwards towards the smoke outlet, and the lowest part of the bottom plate is smoothly connected with the bottom plate of the smoke outlet and is positioned at the same height.
6. The dry desulfurization apparatus according to claim 5, wherein: the inclination angle is 3-7 degrees downward from the horizontal.
7. The dry desulfurization apparatus according to claim 1, wherein: the reactor inner tube (1) and the reactor outer tube (2) are both square tubes.
8. The dry desulfurization apparatus according to claim 7, wherein: the lower part of the baking soda powder bin (3) is conical.
9. The dry desulfurization apparatus according to claim 1, wherein: the flue gas is low-pollution biomass boiler flue gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110526185.XA CN113082995A (en) | 2021-05-14 | 2021-05-14 | Dry desulfurization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110526185.XA CN113082995A (en) | 2021-05-14 | 2021-05-14 | Dry desulfurization device |
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| Publication Number | Publication Date |
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| CN113082995A true CN113082995A (en) | 2021-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110526185.XA Pending CN113082995A (en) | 2021-05-14 | 2021-05-14 | Dry desulfurization device |
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| CN (1) | CN113082995A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115672231A (en) * | 2022-10-19 | 2023-02-03 | 杭州市特种设备检测研究院(杭州市特种设备应急处置中心) | Tubular reactor, heating furnace device and biomass charcoal hydrogen production device with same |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1537034A (en) * | 1976-02-02 | 1978-12-29 | Marshall D | Acid gas scrubber |
| CN207886969U (en) * | 2017-12-29 | 2018-09-21 | 武汉都市环保工程技术股份有限公司 | A kind of dry desulfurizing tower for sodium bicarbonate desulfurization |
| CN210814701U (en) * | 2019-09-16 | 2020-06-23 | 中煤科工清洁能源股份有限公司 | A flue gas desulfurization device |
| CN215311436U (en) * | 2021-05-14 | 2021-12-28 | 上海天晓环保工程有限公司 | Dry desulfurization device |
-
2021
- 2021-05-14 CN CN202110526185.XA patent/CN113082995A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1537034A (en) * | 1976-02-02 | 1978-12-29 | Marshall D | Acid gas scrubber |
| CN207886969U (en) * | 2017-12-29 | 2018-09-21 | 武汉都市环保工程技术股份有限公司 | A kind of dry desulfurizing tower for sodium bicarbonate desulfurization |
| CN210814701U (en) * | 2019-09-16 | 2020-06-23 | 中煤科工清洁能源股份有限公司 | A flue gas desulfurization device |
| CN215311436U (en) * | 2021-05-14 | 2021-12-28 | 上海天晓环保工程有限公司 | Dry desulfurization device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115672231A (en) * | 2022-10-19 | 2023-02-03 | 杭州市特种设备检测研究院(杭州市特种设备应急处置中心) | Tubular reactor, heating furnace device and biomass charcoal hydrogen production device with same |
| CN115672231B (en) * | 2022-10-19 | 2025-02-18 | 杭州市特种设备检测研究院(杭州市特种设备应急处置中心) | Tubular reactor, heating furnace device and biomass charcoal hydrogen production device with same |
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