CN204412043U - A kind of ammonia type flue gas desulfurizing apparatus - Google Patents
A kind of ammonia type flue gas desulfurizing apparatus Download PDFInfo
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- CN204412043U CN204412043U CN201420714789.2U CN201420714789U CN204412043U CN 204412043 U CN204412043 U CN 204412043U CN 201420714789 U CN201420714789 U CN 201420714789U CN 204412043 U CN204412043 U CN 204412043U
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Abstract
A kind of ammonia type flue gas desulfurizing apparatus, relates to chemical industry energy field, mainly comprises High temperature ion liquid dust removing units, ammonia type flue gas desulfurizing unit, organic Rankine bottoming cycle generator unit; The utility model has the advantage of: High temperature ion liquid smoke gas good dedusting effect, the dirt contained in flue gas can be avoided the blocking of system, and the volatilization of ionic liquid difficulty, operating cost is low; Heat exchanger is adopted to be removed in time by heat unnecessary for cyclic ammonia water solution, reduce the temperature of cyclic ammonia water solution, avoid the decomposition of ammonium sulfite, decrease the corrosion to desulphurization plant, cool flue gas in advance simultaneously, thus greatly reduce water content, the ammonia amount of flue gas, and the fraction of particle such as ammonium sulfite, and then decrease secondary pollution, and desulfurization unit runs more economical; The Ammonia aqueous solution replaces flue gas to provide heat, heat transmission equipment small investment for organic Rankine bottoming cycle, and heat exchange efficiency is high, and then energy utilization rate is high, generating efficiency is high.
Description
one, technical field
The utility model relates to chemical industry energy field, particularly a kind of ammonia type flue gas desulfurizing apparatus.
two, background technology
In China, the fume afterheat resource of boiler smoke discharge accounts for 20% of industrial waste heat resource total amount, and exhaust gas temperature is between 120 ~ 250 DEG C.But this part heat is but difficult to be utilized, after main cause is flue gas cool-down, in flue gas, may occur that moisture or other corrosive gas are as the liquefaction such as sulfur dioxide and carbon dioxide, cause equipment corrosion serious, be difficult to stable operation.Therefore, the low temperature boiler smoke of China, be nearly all directly enter desulfurization unit at present, its heat contained cannot reclaim, and causes the significant wastage of low temperature exhaust heat, brings many adverse influences also to the operation of desulfurization unit simultaneously.
For the ammonia process of desulfurization, its reaction principle is as follows:
SO
2﹢H
2O = H
2SO
3
H
2SO
3﹢2NH
3= (NH
4)
2SO
3
(NH
4)
2SO
3﹢1/2O
2 = (NH
4)
2SO
4
Sulfur dioxide in flue gas is dissolved in ammonia spirit, react with water and generate sulfurous acid, sulfurous acid generates ammonium sulfite, after air Injection with ammonia react soluble in water, the ammonium sulfite in solution is made to be oxidized to ammonium sulfate, last oversaturated ammonium sulfate crystallization from solution.
After flue gas between 120 ~ 250 DEG C directly enters ammonia process of desulfurization unit, because its heat carried can not shift out in time, cause the flue-gas temperature of discharging far above air, the volatile quantity of water and ammonia is large.And the temperature of ammonia spirit is too high, to the absorption of sulfur dioxide and course of reaction also very unfavorable, have a strong impact on desulfurized effect.In addition, high temperature also greatly adds the corrosion rate of solution to equipment.Therefore, remove the heat that flue gas is brought in time, for ammonia process of desulfurization unit stable, economical operation is particularly crucial.
Meanwhile, the boiler of China is again based on fire coal, and dust content is large, and at the high-temperature dust removal equipment run, cost is high on the one hand at present, and dust removing effects is also difficult to ensure on the other hand, and therefore dust content is large, and upstream device blocking is serious.
three, utility model content
For problems of the prior art, the utility model provides a kind of ammonia type flue gas desulfurizing apparatus, utilize that High temperature ion liquid carries out flue gas ash removal, flue gas is carried out in the circulation of low temperature ammonia spirit moves heat, desulfurization, and utilize organic Rankine bottoming cycle to move heat and generating power to the Ammonia aqueous solution, to solve environmental pollution, equipment corrosion, blocking, and the problem such as energy utilization rate is low, generating efficiency is low.
The purpose of this utility model is realized by following technical proposals: a kind of ammonia type flue gas desulfurizing apparatus, comprise High temperature ion liquid dust removing units, ammonia type flue gas desulfurizing unit, described High temperature ion liquid dust removing units, comprise sluicing pipe (3) and the flue (19) be connected with sluicing pipe (3) at top, in bottom by the circulating pump A(6 that pipeline is connected with sluicing pipe (3)), at top by the filter (4) that pipeline is connected with sluicing pipe (3), filter (4) and circulating pump A(6) be connected by pipeline, described ammonia type flue gas desulfurizing unit, be included in the concentration tube (2) that bottom is connected with sluicing pipe (3), the absorption tube (1) be connected with concentration tube (2) top and the exhanst gas outlet (31) being arranged on absorption tube (1) top, also comprise the oxidation tube (32) be connected with sluicing pipe (3) bottom, concentration tube (2) is connected by pipeline with oxidation tube (32), oxidation tube (32) is connected with ammonia water pipe (18) with air hose (5), the bottom of oxidation tube (32) is connected with booster pump (7) by pipeline, booster pump (7) is connected with heat exchanger (8) by pipeline, heat exchanger (8) is by pipeline A(11) be connected with crystallization tank (13), pipeline A(11) be connected with enriching section (2), crystallization tank (13) passes through pipeline, circulating pump B(12) with absorption tube (1) middle part ammonia spirit pipe C(25) be connected, pipeline is passed through in absorption tube (1) bottom, circulating pump (28) and absorption tube (1) middle part ammonia spirit pipe C(25) be connected, absorption tube (1) top is also provided with technique water pipe (24).
The sluicing pipe (3) of described High temperature ion liquid dust removing units is provided with " umbrella " shape structure (33) with concentration tube (2), concentration tube (2) with the junction of absorption tube (1), the support of " umbrella " shape structure (33) is provided with airflow hole (34).
Heat exchanger (8) is connected with decompressor (16) by pipeline, decompressor (16) is connected with heat exchanger (8) by pipeline, pipeline is disposed with condenser (23) and circulating pump C(20), decompressor (16) is connected with connecting rod (21), and connecting rod (21) is connected with generator (17).
The utility model has the advantage of: High temperature ion liquid smoke gas good dedusting effect, the dirt contained in flue gas can be avoided the blocking of system, and the volatilization of ionic liquid difficulty, operating cost is low; Heat exchanger is adopted to be removed in time by heat unnecessary for cyclic ammonia water solution, reduce the temperature of cyclic ammonia water solution, avoid the decomposition of ammonium sulfite, decrease the corrosion to desulphurization plant, cool flue gas in advance simultaneously, thus greatly reduce water content, the ammonia amount of flue gas, and the fraction of particle such as ammonium sulfite, and then decrease secondary pollution, and desulfurization unit runs more economical; The Ammonia aqueous solution replaces flue gas to provide heat for organic Rankine bottoming cycle, after can avoiding flue gas cool-down, may occur that moisture or other corrosive gas are as the liquefaction such as sulfur dioxide and carbon dioxide, cause the problem that equipment corrosion is serious in flue gas; The Ammonia aqueous solution replaces flue gas to provide heat, heat transmission equipment small investment for organic Rankine bottoming cycle, and heat exchange efficiency is high, and then energy utilization rate is high, generating efficiency is high.Given this, the dedusting of High temperature ion liquid, ammonia type flue gas desulfurizing and organic Rankine bottoming cycle generating are coupled together by the utility model effectively, achieve the high-temperature dust removal of flue gas, the low temperature ammonia process of desulfurization simultaneously, low-temperature flue gas waste heat reclaims and organic Rankine bottoming cycle generates electricity, under the prerequisite that plant running is more economic and stable, improve chlorine dioxide clearance, the thermal efficiency and generating efficiency.
four, accompanying drawing explanation
Fig. 1 is a kind of ammonia type flue gas desulfurizing apparatus schematic diagram of the present utility model;
Fig. 2 is the schematic diagram of " umbrella " shape structure specially of the present utility model;
Number in the figure is: 1, absorption tube, 2, concentration tube, 3, sluicing pipe, 4, filter; 5, air hose, 6, circulating pump A, 7, booster pump A; 8, heat exchanger; 9, valve A, 10, valve B, 11, pipeline A, 12, circulating pump B, 13, crystallization tank, 14, heater, 15, ammonium sulfate, 16, decompressor, 17, generator, 18, ammonia spirit pipe A, 19, flue, 20, circulating pump C, 21, connecting rod, 22, ammonia spirit pipe B, 23, condenser, 24, technique water pipe, 25, ammonia spirit pipe C, 26, valve C, 27, pipeline B, 28, valve D, 29, cooler, 30, circulating pump D, 31, exhanst gas outlet, 32, oxidation tube, 33, " umbrella " shape structure, 34, airflow hole.
five, detailed description of the invention
Embodiment 1: below with reference to the accompanying drawings, the utility model is further described: a kind of ammonia type flue gas desulfurizing apparatus, utilize that High temperature ion liquid carries out flue gas ash removal, flue gas is carried out in the circulation of low temperature ammonia spirit moves heat, desulfurization, and utilize organic Rankine bottoming cycle to move heat and generating power to the Ammonia aqueous solution, to solve environmental pollution, equipment corrosion, blocking, and the problem such as energy utilization rate is low, generating efficiency is low.A kind of ammonia type flue gas desulfurizing apparatus, comprise High temperature ion liquid dust removing units, ammonia type flue gas desulfurizing unit, described High temperature ion liquid dust removing units, comprise sluicing pipe (3) and the flue (19) be connected with sluicing pipe (3) at top, in bottom by the circulating pump A(6 that pipeline is connected with sluicing pipe (3)), at top by the filter (4) that pipeline is connected with sluicing pipe (3), filter (4) and circulating pump A(6) be connected by pipeline, described ammonia type flue gas desulfurizing unit, be included in the concentration tube (2) that bottom is connected with sluicing pipe (3), the absorption tube (1) be connected with concentration tube (2) top and the exhanst gas outlet (31) being arranged on absorption tube (1) top, also comprise the oxidation tube (32) be connected with sluicing pipe (3) bottom, concentration tube (2) is connected by pipeline with oxidation tube (32), oxidation tube (32) is connected with ammonia water pipe (18) with air hose (5), the bottom of oxidation tube (32) is connected with booster pump (7) by pipeline, booster pump (7) is connected with heat exchanger (8) by pipeline, heat exchanger (8) is by pipeline A(11) be connected with crystallization tank (13), pipeline A(11) be connected with enriching section (2), crystallization tank (13) passes through pipeline, circulating pump B(12) with absorption tube (1) middle part ammonia spirit pipe C(25) be connected, pipeline is passed through in absorption tube (1) bottom, circulating pump (28) and absorption tube (1) middle part ammonia spirit pipe C(25) be connected, absorption tube (1) top is also provided with technique water pipe (24).
The sluicing pipe (3) of described High temperature ion liquid dust removing units is provided with " umbrella " shape structure (33) with concentration tube (2), concentration tube (2) with the junction of absorption tube (1), the support of " umbrella " shape structure (33) is provided with airflow hole (34).
Heat exchanger (8) is connected with decompressor (16) by pipeline, decompressor (16) is connected with heat exchanger (8) by pipeline, pipeline is disposed with condenser (23) and circulating pump C(20), decompressor (16) is connected with connecting rod (21), and connecting rod (21) is connected with generator (17).
The flow of certain boiler smoke is 620000m
3/ hr, temperature is 140 DEG C, and sulfur dioxide volume fraction is 0.202%; Environment temperature is 25 DEG C, and heat exchanger (8) is respectively 10 DEG C and 5 DEG C with the minimum heat transfer temperature difference in condenser (23), and the efficiency of circulating pump and decompressor is respectively 0.65 and 0.85.
First the low-temperature flue gas of 140 DEG C enters the lower end of the sluicing pipe (3) of High temperature ion liquid dust removing units, the ionic liquid of 139 DEG C as: 1, the imidazol ion liquid that 3-dialkyl group replaces, enter from the upper end of sluicing pipe (3), contact with flue gas is from bottom to top reverse, dust washing in flue gas is got off, discharge from the bottom of sluicing pipe (3) more afterwards, and via circulating pump A(6) enter filter (5), mechanical filter is carried out to ionic liquid, after filtering dust wherein, return to the upper end of sluicing pipe (3).
The later flue-gas temperature of dedusting is 139 DEG C, by " umbrella " shape structure special in tower, enter into the concentration tube (2) of ammonia type flue gas desulfurizing unit, heat passes to the two bursts of chargings coming from concentration tube (2) upper end and enter, two strands be together by booster pump (7) from oxidation tube (32) bottom extraction and via heat exchanger (8) lower the temperature after mixed solution (be ammonia, the aqueous solution of ammonium sulfite and ammonium sulfate), and one low temperature ammonia spirit, in flue gas, part sulfur dioxide is also absorbed at concentration tube (2) simultaneously, flue gas afterwards after cooling is by " umbrella " shape structure special in tower, enter into absorption tube (1) bottom, the fresh water (FW) of the absorbing liquid of absorption tube (1) top, second burst of absorbing liquid part is (be ammonia by circulating pump (30) from the circulation solution of absorption tube (1) bottom extraction, the aqueous solution of ammonium sulfite), part is (be ammonia by circulating pump (12) from the circulation solution of crystallization tank (13) extraction, the aqueous solution of ammonium sulfite), part is ammonia spirit, after three converges, after cooler (29) cooling, enter absorption tube (1) top, as secondary charging.Above two strands of absorbing liquids contact with flue gas is reverse in absorption tube (1), and thoroughly absorb the sulfur dioxide in flue gas further, after desulfurization, the temperature of neat stress is 25 DEG C, and content of sulfur dioxide is 12mg/m
3, ammonia content is 6.8mg/m
3.
Passed into 99 DEG C of concentrated solutions (aqueous solution for ammonium sulfite and ammonia) of oxidation tube (4) by concentration tube (2) bottom, the air blasted with oxidation tube (4) bottom carries out forced oxidation reaction, fills into the ammonia spirit after heater (22) preheating more simultaneously.The temperature of oxidation tube (4) bottom Produced Liquid is 98 DEG C, be sent to after heat exchanger (8) transfers heat to organic Rankine bottoming cycle unit via booster pump (7), part solution after cooling returns concentration tube (2), remainder then enters crystallization tank (9), separate out ammonia sulfate crystal from solution after, more than remaining crystallization, liquid sends into concentration tube (2) by circulating pump (16) again.
In organic Rankine bottoming cycle generator unit, low temperature, the organic media liquid of high pressure is as R245fa, the heat coming from the high temperature concentrated ammonia solution of ammonia type flue gas desulfurizing unit is absorbed by heat exchanger (8), and be vaporized as high temperature in the cold survey of heat exchanger (8), the R245fa gas of high pressure, the R245fa gas of high pressure enters decompressor (16) afterwards, generated electricity via connecting rod (21) drive electrical generators (17) by decompressor (16), generating total amount can reach 1.26MW, the temperature of R245fa gas afterwards, pressure all reduces, step-down, to lower the temperature later R245fa gas, enter condenser (23), be condensed into low temperature, the R245fa liquid of low pressure, R245fa liquid is again via circulating pump C(20) pressurization after, enter the cold survey of heat exchanger (8), again high temperature is heated to be, the R245fa gas of high pressure, complete a circulation.
Claims (2)
1. an ammonia type flue gas desulfurizing apparatus, it is characterized in that: comprise High temperature ion liquid dust removing units, ammonia type flue gas desulfurizing unit, described High temperature ion liquid dust removing units, comprise sluicing pipe (3) and the flue (19) be connected with sluicing pipe (3) at top, in bottom by the circulating pump A(6 that pipeline is connected with sluicing pipe (3)), at top by the filter (4) that pipeline is connected with sluicing pipe (3), filter (4) and circulating pump A(6) be connected by pipeline, described ammonia type flue gas desulfurizing unit, be included in the concentration tube (2) that bottom is connected with sluicing pipe (3), the absorption tube (1) be connected with concentration tube (2) top and the exhanst gas outlet (31) being arranged on absorption tube (1) top, also comprise the oxidation tube (32) be connected with sluicing pipe (3) bottom, concentration tube (2) is connected by pipeline with oxidation tube (32), oxidation tube (32) is connected with ammonia water pipe (18) with air hose (5), the bottom of oxidation tube (32) is connected with booster pump (7) by pipeline, booster pump (7) is connected with heat exchanger (8) by pipeline, heat exchanger (8) is by pipeline A(11) be connected with crystallization tank (13), pipeline A(11) be connected with enriching section (2), crystallization tank (13) passes through pipeline, circulating pump B(12) with absorption tube (1) middle part ammonia spirit pipe C(25) be connected, pipeline is passed through in absorption tube (1) bottom, circulating pump (28) and absorption tube (1) middle part ammonia spirit pipe C(25) be connected, absorption tube (1) top is also provided with technique water pipe (24).
2. a kind of ammonia type flue gas desulfurizing apparatus according to claim 1, it is characterized in that: the sluicing pipe (3) of described High temperature ion liquid dust removing units is provided with " umbrella " shape structure (33) with concentration tube (2), concentration tube (2) with the junction of absorption tube (1), the support of " umbrella " shape structure (33) is provided with airflow hole (34).
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|---|---|---|---|
| CN201420714789.2U CN204412043U (en) | 2014-11-25 | 2014-11-25 | A kind of ammonia type flue gas desulfurizing apparatus |
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| CN201420714789.2U CN204412043U (en) | 2014-11-25 | 2014-11-25 | A kind of ammonia type flue gas desulfurizing apparatus |
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| CN204412043U true CN204412043U (en) | 2015-06-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106345248A (en) * | 2015-07-13 | 2017-01-25 | 中国石化工程建设有限公司 | Ammonia process fume dust collection desulfurization and denitrification integral purification system and method |
-
2014
- 2014-11-25 CN CN201420714789.2U patent/CN204412043U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106345248A (en) * | 2015-07-13 | 2017-01-25 | 中国石化工程建设有限公司 | Ammonia process fume dust collection desulfurization and denitrification integral purification system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 811600 Gan he Industrial Park, Xining economic and Technological Development Zone, Qinghai Patentee after: Qinghai West Tongxin Chemical Co., Ltd. Address before: 810001 Gan River Industrial Park, Xining economic and Technological Development Zone, Xining, Qinghai Patentee before: QINGHAI TONGXIN CHEMICAL CO., LTD. |
|
| CP03 | Change of name, title or address |