CN201380040Y - Combined device for purifying coal-fired flue gas - Google Patents
Combined device for purifying coal-fired flue gas Download PDFInfo
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- CN201380040Y CN201380040Y CN200920038134U CN200920038134U CN201380040Y CN 201380040 Y CN201380040 Y CN 201380040Y CN 200920038134 U CN200920038134 U CN 200920038134U CN 200920038134 U CN200920038134 U CN 200920038134U CN 201380040 Y CN201380040 Y CN 201380040Y
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- tower
- flue gas
- gas
- absorption tower
- coal
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Abstract
The utility model relates to a combined device for purifying coal-fired flue gas, which comprises an absorption tower and a concentration and crystallization tower; wherein the absorption tower comprises a washing and demisting section, an absorbing section and an oxidizing section with an oxidized air and absorbent inlet formed thereon; a raw flue gas inlet is formed on the concentration and crystallization tower; a flue gas outlet of the concentration and crystallization tower is communicated with a flue gas inlet of the absorption tower; an upper spraying layer, an middle spraying layer and a lower spraying layer of the absorbing section of the absorption tower are respectively connected with circulation pipelines of a lower layer feed liquid, a middle layer feed liquid and an upper layer feed liquid of the oxidizing section; each pipeline is provided with a circulating pump; the concentration and crystallization tower is provided with a crystallization sprayer which is connected with an output pipeline at the bottom of the absorption tower; the pipeline is provided with a feed liquid pump; and a discharge port is formed at the bottom of the concentration and crystallization tower. The device has the advantages of high desulphurization and denitration rate, full utilization of flue gas heat and low energy consumption.
Description
Technical field
The utility model relates to the composite set that a kind of coal-fired flue-gas purifies, and relates in particular to gas cleaning and the by-product concentrated composite set of ammonia (ammoniacal liquor, carbon ammonium, liquefied ammonia) as absorbent, can be used for SO in the flue gas
2And NO
XRemove and the condensing crystallizing of desulfurization by-product.
Background technology
SO in the flue gas that boiler fired coal combustion produced
2And NO
XBeing to environment and human harmful material, is the important object of environmental improvement, and SO in the flue gas therefore must take measures to reduce before fume emission
2And NO
XContent.
At present, the technology that is applied to flue gas desulfurization has a lot, the ammonia process wet desulfurizing process because of its non-secondary pollution, can realize advantages such as recycling economy, more and more be subjected to people's attention.The ammonia process of desulfurization is the SO that utilizes in liquefied ammonia or the deposed ammonia absorption flue gas
2, generate the ammonium sulfite oxidation step of going forward side by side and become ammonium sulfate.Ammonium sulfate product is a kind of good chemical fertilizer, has better economic and is worth.
Except that desulfurization, flue gas also need take off NO
XAt present, flue gas ammonia-method denitration technology mainly contains SCR (SCR) and SNCR (SNCR), be to utilize ammonia to make reducing agent, discharge after nitrogen oxide is reduced to nitrogen, should the investment construction corresponding device thereof, also need consume a large amount of ammonia, select noble metal catalyst for use, reaction condition is harsh, and operating cost is very high.
The present domestic report of the technology of ammonia process combined desulfurization and denitration is also less, mainly still concentrates on NO
XBe reduced into nitrogen or be oxidized to NO
2After carry out desulfurization again and further handle, these technologies still exist problems such as operating cost height, absorbent consumption are big.
Summary of the invention
The purpose of this invention is to provide and a kind ofly make the Wet-type ammonia process flue gas purifying composite set of absorbent, realize the desulphurization denitration of flue gas with ammonia.
The composite set that this coal-fired flue-gas purifies comprises the absorption tower, and the absorption tower is provided with gas approach and clean exhanst gas outlet, contains washing demist section, absorber portion and oxidation panel in the absorption tower from top to bottom, and oxidation panel is provided with oxidation air and absorbent inlet; This composite set also comprises the condensing crystallizing tower, and said condensing crystallizing tower is provided with former gas approach, and the exhanst gas outlet of condensing crystallizing tower communicates with the gas approach on absorption tower; The absorber portion on absorption tower is provided with the upper, middle and lower-ranking spraying layer, and links to each other with lower floor, middle level, the upper strata feed liquid mouth of oxidation panel by circulation line respectively, and each pipeline is provided with circulating pump; Each pipeline is provided with circulating pump; Said condensing crystallizing tower is provided with the crystallization spray thrower, and it links to each other with output pipe at the bottom of the absorption Tata, and pipeline is provided with feed pump, is provided with discharging opening at the bottom of the tower of condensing crystallizing tower.
The former flue gas of this device feeds the condensing crystallizing tower, utilizes the heat of flue gas to make ammonium sulfate evaporation in the condensing crystallizing tower, the crystallization that reaches capacity, and favourable subsequent treatment to producing ammonium sulfate byproduct, and saved energy consumption; In the absorption tower, then utilize the intermediate product sulfurous hydracid ammonium of ammonia sweetening process and the reducing property of ammonium sulfite, return absorber portion flue gas is sprayed, nitrogen oxide is reduced into nitrogen and is removed, do not increase the consumption of ammonia, absorbent utilization rate height.This device is realized the decreasing temperature and increasing humidity of flue gas and the saturated crystallization of ammonium sulfate solution by the condensing crystallizing tower, realize the desulphurization denitration of coal-fired flue-gas by purifying column, the desulfurization degree of this device greater than 95%, denitration rate 30-70%, the concentrate crystalline particle is big, obtain high-quality sulphur ammonium accessory substance, energy consumption is low, the efficient height.
In sum, this device have a following advantage: 1) by the washing cooling in advance of 50 pairs of flue gases of condensing crystallizing tower, can reduce the running resistance on absorption tower 10, can utilize flue gas heat simultaneously again, save energy consumption separating out crystal from the ammonium sulfate evaporation and concentration of bottom, absorption tower; 2) adopt this composite set, the purifying column height is reduced, on this basis, the tower body material also can be selected nonmetallic materials, reduces cost by a relatively large margin; 3) utilize ammonia sweetening process intermediate product to carry out denitration, do not increase the consumption of ammonia; 4) utilize absorption tower flow field distribution technique, the operation simple in structure of application multilayer spraying layer is reliable and stable in the tower.
Description of drawings
Fig. 1 is the structural representation of the composite set of this coal-fired flue-gas purification.
Among the figure, 10-absorption tower, 11-smoke inlet, 12-exhanst gas outlet, 20-demist section, 21-demister, 22-water spraying layer, 23-filler, the 30-absorber portion, 31-upper strata spray thrower, 32-middle level spray thrower, 33-lower floor spray thrower, 40-oxidation panel, 41-denitration circulation layer, 42-desulphurization circulating layer, 43-air sparger, 44-oxidation panel bottom inlet, 50-condensing crystallizing tower, 51-crystallization spray thrower, 52-side direction agitator, 61,62, the 63-circulating pump, 64-feed pump, 641-crystallization pump.
The specific embodiment
Example structure and operation principle below in conjunction with this device of description of drawings.
This device comprises absorption tower 10 and condensing crystallizing tower 50.Purifying column 10 is divided into three sections by function, and top is washing demist section 20, and the middle part is an absorber portion 30, and the bottom is an oxidation panel 40; Flue gas through dedusting enters condensing crystallizing tower 50 by smoke inlet 111, the ammonium sulfate saturated solution counter current contacting that ejects with crystallization spray thrower 51, after flue gas is cooled to and is dropped to 70-90 ℃, enter the absorber portion 30 of purifying column 10 through the import 11 of purifying column from the top outlet, flue gas contacts with the absorption liquid of spray thrower 31,32,33 ejections and cools to below 65 ℃, then upwards successively denitration layer 33, the desulfurization layer 32,31 by absorber portion absorb, enter the washing demist section 20 on top again, after washing and demist, discharge clean flue gas from exporting 12.Absorption liquid drops to oxidation panel 40, and bottom inlet 44 addings evenly distribute through air sparger 43, and ammonium sulfite is carried out forced oxidation.The top of oxidation panel 40 is denitration circulation layer 41, and the middle part is a desulphurization circulating layer 42, and the bottom is an oxide layer.Denitration circulation layer 41 communicates with lower floor's spray thrower 33 of absorber portion by the tower external circulation line, desulphurization circulating layer 42 communicates with the middle level spray thrower 32 of absorber portion by the tower external circulation line, oxide layer communicates with the upper strata spray thrower 31 of absorber portion by the tower external circulation line, and each circulation line is respectively equipped with circulating pump 61,62,63.Oxidation air and desulfurizing agent ammonia are no less than three circulations absorptions that are respectively applied for desulphurization denitration from the circulating pump of the periphery on oxidation panel absorption tower.Feed pump 64 is no less than one and is used for absorption liquid is delivered to crystallization spray thrower 51, is provided with the side direction agitator at the bottom of the tower of crystallizing tower 50.Crystallization pump 641 be no less than one be used for the slip behind the condensing crystallizing deliver to the back system further handle.Being provided with percent opening in the oxidation panel greater than 30% filler, generally is the sieve plate filler, and demist section packing layer is filled with specific area greater than 200m
2/ m
3Filler, as big voidage ripple packing, silk screen or deflection plate etc., guarantee that generally the composite set overall presure drop is below 1500Pa.
Claims (5)
1. the composite set of coal-fired flue-gas purification comprises the absorption tower, is provided with gas approach and clean exhanst gas outlet, contains washing demist section, absorber portion and oxidation panel in the absorption tower from top to bottom, and oxidation panel is provided with oxidation air and absorbent inlet; It is characterized in that device also comprises the condensing crystallizing tower, said condensing crystallizing tower is provided with former gas approach, the exhanst gas outlet of condensing crystallizing tower communicates with the gas approach on absorption tower, the absorber portion on absorption tower is provided with the upper, middle and lower-ranking spraying layer, and link to each other with lower floor, middle level, the upper strata feed liquid mouth of oxidation panel by circulation line respectively, each pipeline is provided with circulating pump; Said condensing crystallizing tower is provided with the crystallization spray thrower, and it links to each other with output pipe at the bottom of the absorption Tata, and the feed pump that pipeline is established is provided with discharging opening at the bottom of the tower of condensing crystallizing tower.
2. the composite set that coal-fired flue-gas according to claim 1 purifies is characterized in that being provided with in the oxidation panel percent opening greater than 30% filler; Demist section packing layer is filled with specific area greater than 200m
2/ m
3Filler.
3. the composite set that coal-fired flue-gas according to claim 2 purifies, the filler that it is characterized in that oxidation panel is the sieve plate filler.
4. the composite set that coal-fired flue-gas according to claim 2 purifies is characterized in that demist section filler is ripple packing, silk screen or deflection plate.
5. the composite set that purifies according to claim 1 or 2 or 3 or 4 described coal-fired flue-gas is characterized in that being provided with the side direction agitator at the bottom of the tower of said condensing crystallizing tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920038134U CN201380040Y (en) | 2009-01-23 | 2009-01-23 | Combined device for purifying coal-fired flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920038134U CN201380040Y (en) | 2009-01-23 | 2009-01-23 | Combined device for purifying coal-fired flue gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201380040Y true CN201380040Y (en) | 2010-01-13 |
Family
ID=41523514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920038134U Expired - Lifetime CN201380040Y (en) | 2009-01-23 | 2009-01-23 | Combined device for purifying coal-fired flue gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201380040Y (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10016721B1 (en) | 2017-05-25 | 2018-07-10 | Jiangnan Environmental Protection Group Inc. | Ammonia-based desufurization process and apparatus |
| US10092877B1 (en) | 2017-05-25 | 2018-10-09 | Jiangnan Environmental Protection Group Inc. | Dust removal and desulfurization of FCC exhaust gas |
| US10099170B1 (en) | 2017-06-14 | 2018-10-16 | Jiangnan Environmental Protection Group Inc. | Ammonia-adding system for ammonia-based desulfurization device |
| US10112145B1 (en) | 2017-09-07 | 2018-10-30 | Jiangnan Environmental Protection Group Inc. | Method for controlling aerosol production during absorption in ammonia desulfurization |
| US20190001267A1 (en) | 2017-07-03 | 2019-01-03 | Jiangnan Environmental Protection Group Inc. | Desulfurization absorption tower |
| US10207220B2 (en) | 2017-03-15 | 2019-02-19 | Jiangnan Environmental Protection Group Inc. | Method and apparatus for removing sulfur oxides from gas |
| CN110975564A (en) * | 2019-04-08 | 2020-04-10 | 贺海涛 | Comprehensive recovery process for pollutants in high-aluminum coal flue gas purification |
| US10953365B2 (en) | 2018-07-20 | 2021-03-23 | Jiangnan Environmental Protection Group Inc. | Acid gas treatment |
| US11027234B2 (en) | 2018-04-13 | 2021-06-08 | Jiangnan Environmental Protection Group Inc. | Oxidization of ammonia desulfurization solution |
| US11224838B2 (en) | 2019-12-26 | 2022-01-18 | Jiangnan Environmental Protection Group Inc. | Controlling aerosol production during absorption in ammonia-based desulfurization |
-
2009
- 2009-01-23 CN CN200920038134U patent/CN201380040Y/en not_active Expired - Lifetime
Cited By (32)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10207220B2 (en) | 2017-03-15 | 2019-02-19 | Jiangnan Environmental Protection Group Inc. | Method and apparatus for removing sulfur oxides from gas |
| US10406477B2 (en) | 2017-03-15 | 2019-09-10 | Jiangnan Environmental Protection Group Inc. | Method and apparatus for removing sulfur oxides from gas |
| US10675584B2 (en) | 2017-03-15 | 2020-06-09 | Jiangnan Environmental Protection Group Inc. | Method and apparatus for removing sulfur oxides from gas |
| US10413864B2 (en) | 2017-03-15 | 2019-09-17 | Jiangnan Environmental Protection Group Inc. | Method and apparatus for removing sulfur oxides from gas |
| US10016721B1 (en) | 2017-05-25 | 2018-07-10 | Jiangnan Environmental Protection Group Inc. | Ammonia-based desufurization process and apparatus |
| US10471383B2 (en) | 2017-05-25 | 2019-11-12 | Jiangnan Environmental Protection Group Inc. | Dust removal and desulfurization of FCC exhaust gas |
| US10561982B2 (en) | 2017-05-25 | 2020-02-18 | Jiangnan Environmental Protection Group Inc. | Ammonia-based desulfurization process and apparatus |
| US10213739B2 (en) | 2017-05-25 | 2019-02-26 | Jiangnan Environmental Protection Group Inc. | Dust removal and desulfurization of FCC exhaust gas |
| US10343110B2 (en) | 2017-05-25 | 2019-07-09 | Jiangnan Environmental Protection Group Inc. | Dust removal and desulfurization of FCC exhaust gas |
| US10413865B2 (en) | 2017-05-25 | 2019-09-17 | Jiangnan Enviromental Protection Group Inc. | Ammonia-based desulfurization process and apparatus |
| US10406478B2 (en) | 2017-05-25 | 2019-09-10 | Jiangnan Environmental Protection Group Inc. | Ammonia-based desulfurization process and apparatus |
| US10399033B2 (en) | 2017-05-25 | 2019-09-03 | Jiangnan Environmental Protection Group Inc. | Ammonia-based desulfurization process and apparatus |
| US10092877B1 (en) | 2017-05-25 | 2018-10-09 | Jiangnan Environmental Protection Group Inc. | Dust removal and desulfurization of FCC exhaust gas |
| US10589212B2 (en) | 2017-06-14 | 2020-03-17 | Jiangnan Environmental Protection Group Inc. | Ammonia-adding system for ammonia-based desulfurization device |
| US10159929B1 (en) | 2017-06-14 | 2018-12-25 | Jiangnan Environmental Protection Group Inc. | Ammonia-adding system for ammonia-based desulfurization device |
| US10099170B1 (en) | 2017-06-14 | 2018-10-16 | Jiangnan Environmental Protection Group Inc. | Ammonia-adding system for ammonia-based desulfurization device |
| US10583386B2 (en) | 2017-06-14 | 2020-03-10 | Jiangnan Environmental Protection Group Inc. | Ammonia-adding system for ammonia-based desulfurization device |
| US10618001B2 (en) | 2017-07-03 | 2020-04-14 | Jiangnan Environmental Protection Group Inc. | Desulfurization absorption tower |
| US10421040B2 (en) | 2017-07-03 | 2019-09-24 | Jiangnan Environmental Protection Group Inc. | Desulfurization absorption tower |
| US20190001267A1 (en) | 2017-07-03 | 2019-01-03 | Jiangnan Environmental Protection Group Inc. | Desulfurization absorption tower |
| US10556205B2 (en) | 2017-07-03 | 2020-02-11 | Jiangnan Environmental Protection Group Inc. | Desulfurization absorption tower |
| US10561984B2 (en) | 2017-07-03 | 2020-02-18 | Jiangnan Environmental Protection Group Inc. | Desulfurization absorption tower |
| US10427097B2 (en) | 2017-07-03 | 2019-10-01 | Jiangnan Environmental Protection Group Inc. | Desulfurization absorption tower |
| US10112145B1 (en) | 2017-09-07 | 2018-10-30 | Jiangnan Environmental Protection Group Inc. | Method for controlling aerosol production during absorption in ammonia desulfurization |
| US10449488B2 (en) | 2017-09-07 | 2019-10-22 | Jiangnan Environmental Protection Group Inc. | Method for controlling aerosol production during absorption in ammonia desulfurization |
| US10369517B2 (en) | 2017-09-07 | 2019-08-06 | Jiangnan Environmental Protection Group Inc. | Method for controlling aerosol production during absorption in ammonia desulfurization |
| US10357741B2 (en) | 2017-09-07 | 2019-07-23 | Jiangnan Environmental Protection Group Inc. | Method for controlling aerosol production during absorption in ammonia desulfurization |
| US11027234B2 (en) | 2018-04-13 | 2021-06-08 | Jiangnan Environmental Protection Group Inc. | Oxidization of ammonia desulfurization solution |
| US10953365B2 (en) | 2018-07-20 | 2021-03-23 | Jiangnan Environmental Protection Group Inc. | Acid gas treatment |
| US11529584B2 (en) | 2018-07-20 | 2022-12-20 | Jiangnan Environmental Protection Group Inc. | Acid gas treatment |
| CN110975564A (en) * | 2019-04-08 | 2020-04-10 | 贺海涛 | Comprehensive recovery process for pollutants in high-aluminum coal flue gas purification |
| US11224838B2 (en) | 2019-12-26 | 2022-01-18 | Jiangnan Environmental Protection Group Inc. | Controlling aerosol production during absorption in ammonia-based desulfurization |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: JIANGSU NEW CENTURY JIANGNAN ENVIRONMENTAL PROTECT Free format text: FORMER NAME: JIANGSU XINSHIJI JIANGNAN ENVIRONMENTAL PROTECTION CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 211100 No. 108, Tianyuan Road, Jiangning national hi tech Development Zone, Nanjing, Jiangsu, China Patentee after: Jiangsu New Century Jiangnan Environmental Protection Co., Ltd. Address before: 211100 No. 108, Tianyuan Road, Jiangning national hi tech Development Zone, Nanjing, Jiangsu, China Patentee before: Jiangsu Jiangnan Environment Protection and Research Academy |
|
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 211100, No. 29, Su Yuan Avenue, Jiangning District, Jiangsu, Nanjing Patentee after: Jiangsu New Century Jiangnan Environmental Protection Co., Ltd. Address before: 211100 No. 108, Tianyuan Road, Jiangning national hi tech Development Zone, Nanjing, Jiangsu, China Patentee before: Jiangsu New Century Jiangnan Environmental Protection Co., Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20100113 |