CN101920158B - Flue gas desulfurization device utilizing ammonia water and humate solution and desulfurization method - Google Patents
Flue gas desulfurization device utilizing ammonia water and humate solution and desulfurization method Download PDFInfo
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- CN101920158B CN101920158B CN 201010270581 CN201010270581A CN101920158B CN 101920158 B CN101920158 B CN 101920158B CN 201010270581 CN201010270581 CN 201010270581 CN 201010270581 A CN201010270581 A CN 201010270581A CN 101920158 B CN101920158 B CN 101920158B
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- flue gas
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- ammoniacal liquor
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Abstract
The invention relates to a flue gas desulfurization device utilizing ammonia water and a humate solution and a desulfurization method in the technical field of flue gas desulfurization. The flue gas desulfurization device comprises a desulfurization device, an oxidation device, a heat exchanger, a separation and dryness device and a residual ammonia absorbing device, wherein the oxidation device is connected with the output end of the desulfurization device; the output end of the oxidation device is successively connected with the heat exchanger, the separation and dryness device and the residual ammonia absorbing device in series; solid particles obtained by separating and drying the desulfurized solution are output to the residual ammonia absorbing device; and pumps and fans as flow delivery devices are arranged in connection pipes among the desulfurization device, the oxidation device, the heat exchanger, the separation and dryness device and the residual ammonia absorbing device. The invention can effectively reduce ammonia escape, the product can be recovered as a high-efficiency and high-quality composite fertilizer, the whole system stably and reliably operates, energy consumption is little, and desulfurization efficiency is high.
Description
Technical field
What the present invention relates to is the device and method in a kind of flue gas desulfurization technique field, specifically a kind of flue gas desulfur device and sulfur method that utilizes ammoniacal liquor and humate solution.
Background technology
Present flue gas desulfurization technique mainly contains limestone-based process, two alkaline process and ammonia absorption process etc.The major defect of limestone-based process is that fouling and blockage problem are serious.And two alkaline process overcome the easy fouling of limestone-based process and blockage problem and grow up, and its absorbs SO with the aqueous solution of alkaline metal salt
2, then will absorb SO
2After regeneration of waste liquor after recycling.Although two alkaline process have overcome fouling and blockage problem, desulfurization product is difficult to recycling.The ammonia absorption process mainly contains two kinds of wet type and half dry types, and they all are only to adopt ammonia as desulfurizing agent, remove the SO in the flue gas
2, products such as remanufacture sulfuric acid, ammonium sulfate, ammonium sulfite simultaneously, thus realized the recycling of sulphur resource, belong to green clean technology.
But have following defective for wet type ammonia absorption process desulfur technology: desulfurizing tower moves under acid condition, and equipment corrosion is large, and the energy resource consumption of recovery product vapor is large etc.; And also having following shortcoming for half dry type ammonia absorption process desulfur technology: part accessory substance difficult treatment, the ammonia consumption is large and the escaping of ammonia is serious, causes easily secondary pollution.
Find through the retrieval to prior art, the document of publication number CN101422697A is to adopt the remaining ammonia of demister capture is set, but fail to solve the problem of the escaping of ammonia, and the present invention can all effectively remove remaining ammonia and by-product high-efficiency high-quality compound fertilizer in the flue gas comprehensively.
Summary of the invention
The present invention is directed to the prior art above shortcomings, a kind of flue gas desulfur device and sulfur method that utilizes ammoniacal liquor and humate solution is provided, can effectively reduce the escaping of ammonia, and product reclaims as the high-efficiency high-quality compound fertilizer, the whole system stable and reliable operation, consuming little energy, desulfuration efficiency is high.
The present invention is achieved by the following technical solutions:
The present invention relates to a kind of flue gas desulfur device that utilizes ammoniacal liquor and humate solution, comprise: desulfurizer, oxidation unit, heat-exchanger rig, separate drying device and remaining ammonia adsorbent equipment, wherein: oxidation unit links to each other with the output of desulfurizer, the output of the oxidation unit heat-exchanger rig of connecting successively, separate drying device and remaining ammonia adsorbent equipment, the solid particle that solution after the desulfurization is obtained after separating drying exports remaining ammonia adsorbent equipment, above-mentioned desulfurizer to, oxidation unit, heat-exchanger rig, separate and to be provided with pump in the connecting line between drying device and the remaining ammonia adsorbent equipment and blower fan is carried as fluid.
Described desulfurizer comprises: desulfurizing tower and surge tank, wherein: the output of desulfurizing tower links to each other with surge tank.
Described oxidation unit comprises: oxidation tank and high-efficiency aerator, and wherein: high-efficiency aerator places the inside center of oxidation tank, and oxidation tank is contacted mutually with the surge tank employing pipeline in the desulfurizer.
Described heat-exchanger rig adopts the dividing wall type heat exchange of heat pipe, and this dividing wall type heat exchange of heat pipe adopts heat pipe as heat transfer element, solution evaporator section and the condensation segment of heat pipe of flowing through respectively after high-temperature flue gas and the desulfurization;
Described separation drying device comprises: cyclone hydraulic separators and steam dryer, wherein: the input of cyclone hydraulic separators is contacted with pipeline mutually with the condensation segment of wall type heat exchange of heat pipe, and the output of cyclone hydraulic separators links to each other with steam dryer.
Described remaining ammonia adsorbent equipment adopts fixed packed bed reactor, and being shaped as of this fixed packed bed reactor is cylindrical, adopts column plate to support, and filler is the solid particle that solution obtains after separating drying after the desulfurization.
The present invention relates to the sulfur method of above-mentioned flue gas desulfur device, may further comprise the steps:
Step 1, ammoniacal liquor and the humate solution for preparing sprayed in the tower with nozzle respectively from desulfurizing tower top;
The concentration of described ammoniacal liquor is that mass concentration is 5%～10%;
The concentration of described humate solution is that mass concentration is 3%～5%;
Solution after step 3, the first desulfurization is collected the Buffer Pool from the desulfurizing tower bottom, recycles in pump input desulfurizing tower, until the pH value is 3-4;
The flue gas that contains part residue ammonia after step 6, the desulfurization passes into from the adsorption tower bottom, and after adsorbent absorption, clean gas is discharged from top.
After the absorption of step 7, remaining ammonia adsorbent is saturated, from the discharging of adsorption tower bottom, namely get the ammonium compound fertilizer material.
Compared with prior art, effect of the present invention comprises:
1, present technique technique desulfuration efficiency reaches more than 98%, and the escape of ammonia is close to zero, and denitration efficiency reaches more than 50%, without any discharge of wastewater, can also produce the ammonium compound fertilizer material, has considerable economic worth.
2, the steam of present technique consumption is few, owing to used fume afterheat to concentrate the desulfurization Generation Liquid, so consumption steam is about 10% of common ammonia-process desulfurization technique consumption quantity of steam, the integrated operation cost is very low, meets the energy-saving and emission-reduction of country's promotion and the requirement of sustainable development.
Therefore, the ammonia consumption that the present invention has remedied existing ammonia absorption process desulfur technology causes the escaping of ammonia that environment is caused secondary pollution and the high deficiency of reclaim sulfuric acid ammonium fertilizer cost greatly, easily, and a kind of advanced flue gas treating process technology of utilizing ammoniacal liquor-humate solution desulfurization and by-product ammonium compound fertilizer material is provided.
Description of drawings
Fig. 1 is structural representation of the present invention.
The specific embodiment
The below elaborates to embodiments of the invention, and present embodiment is implemented under take technical solution of the present invention as prerequisite, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
As shown in Figure 1, the related desulphurization system device of following examples comprises: desulfurizer 1, oxidation unit 2, heat-exchanger rig 3, separate drying device 4 and remaining ammonia adsorbent equipment 5, wherein: oxidation unit 2 links to each other with the output of desulfurizer 1, the output of oxidation unit 2 heat-exchanger rig 3 of connecting successively, separate drying device 4 and remaining ammonia adsorbent equipment 5, the solid particle that solution after the desulfurization is obtained after separating drying exports remaining ammonia adsorbent equipment 5, above-mentioned desulfurizer 1 to, oxidation unit 2, heat-exchanger rig 3, separate and to be provided with pump in the connecting line between drying device 4 and the remaining ammonia adsorbent equipment 5 and blower fan is carried as fluid.
Described desulfurizer 1 comprises: desulfurizing tower 6 and surge tank 7, and wherein: desulfurizing tower is positioned at before the surge tank, adopts pipeline to connect;
Described oxidation unit 2 comprises: oxidation tank 8 and high-efficiency aerator 9, and wherein: high-efficiency aerator places centre in the oxidation tank; Oxidation tank is contacted mutually with the surge tank employing pipeline in the desulfurizer;
Described heat-exchanger rig 3 adopts dividing wall type heat exchange of heat pipes 10, and this dividing wall type heat exchange of heat pipe adopts heat pipe as heat transfer element, solution evaporator section and the condensation segment of heat pipe of flowing through respectively after high-temperature flue gas and the desulfurization;
Described separation drying device 4 comprises: cyclone hydraulic separators 11 and steam dryer 12, wherein: contact mutually with pipeline with the condensation segment of wall type heat exchange of heat pipe before the cyclone hydraulic separators; After connect steam dryer.
Described remaining ammonia adsorbent equipment 5 adopts fixed packed bed reactor 13, and being shaped as of this fixed packed bed reactor is cylindrical, adopts column plate to support, and filler is the solid particle that solution obtains after separating drying after the desulfurization.
Embodiment 1:
Flue gas composition: 78% N
2, 18%CO
2, 1000ppm SO
2And steam.Flue gas flow: 10Nm
3/ min; Ammoniacal liquor flow: 100ml/min; Ammonia concn: 5%; Humate solution flow: 1500ml/min; Humate solution concentration: 3%.
The result:
| Flue gas flow | SO after purifying 2Concentration | NH after purifying 3Concentration |
| 10Nm 3/min | 0ppm | 0ppm |
Flue gas composition: 78% N
2, 18%CO
2, 1500ppm SO
2And steam.Flue gas flow: 10Nm
3/ min; Ammoniacal liquor flow: 150ml/min; Ammonia concn: 5%; Humate solution flow: 1500ml/min; Humate solution concentration: 3%.
The result:
| Flue gas flow | SO after purifying 2Concentration | NH after purifying 3Concentration |
| 10Nm 3/min | 10ppm | 0ppm |
Flue gas composition: 78% N
2, 18%CO
2, 2000ppm SO
2And steam.Flue gas flow: 10Nm
3/ min; Ammoniacal liquor flow: 150ml/min; Ammonia concn: 8%; Humate solution flow: 1500ml/min; Humate solution concentration: 4%.
The result:
| Flue gas flow | SO after purifying 2Concentration | NH after purifying 3Concentration |
| 10Nm 3/min | 33ppm | 0ppm |
Flue gas composition: 78% N
2, 18%CO
2, 2000ppm SO
2And steam.Flue gas flow: 10Nm
3/ min; Ammoniacal liquor flow: 100ml/min; Ammonia concn: 10%; Humate solution flow: 1500ml/min; Humate solution concentration: 4%.
The result:
| Flue gas flow | SO after purifying 2Concentration | NH after purifying 3Concentration |
| 10Nm 3/min | 35ppm | 0ppm |
Flue gas composition: 78% N
2, 18%CO
2, 2000ppm SO
2And steam.Flue gas flow: 10Nm
3/ min; Ammoniacal liquor flow: 150ml/min; Ammonia concn: 10%; Humate solution flow: 2000ml/min; Humate solution concentration: 5%.
The result:
| Flue gas flow | SO after purifying 2Concentration | NH after purifying 3Concentration |
| 10Nm 3/min | 30ppm | 0ppm |
Claims (8)
1. flue gas desulfur device that utilizes ammoniacal liquor and humate solution, comprise: desulfurizer, oxidation unit, heat-exchanger rig, separate drying device and remaining ammonia adsorbent equipment, it is characterized in that: oxidation unit links to each other with the output of desulfurizer, the output of the oxidation unit heat-exchanger rig of connecting successively, separate drying device and remaining ammonia adsorbent equipment, the solid particle that solution after the desulfurization is obtained after separating drying exports remaining ammonia adsorbent equipment, above-mentioned desulfurizer to, oxidation unit, heat-exchanger rig, separate and to be provided with pump in the connecting line between drying device and the remaining ammonia adsorbent equipment and blower fan is carried as fluid.
2. the flue gas desulfur device that utilizes ammoniacal liquor and humate solution according to claim 1 is characterized in that, described desulfurizer comprises: desulfurizing tower and surge tank, wherein: the output of desulfurizing tower links to each other with surge tank.
3. the flue gas desulfur device that utilizes ammoniacal liquor and humate solution according to claim 2, it is characterized in that, described oxidation unit comprises: oxidation tank and high-efficiency aerator, wherein: high-efficiency aerator places the inside center of oxidation tank, and oxidation tank is contacted mutually with the surge tank employing pipeline in the desulfurizer.
4. the flue gas desulfur device that utilizes ammoniacal liquor and humate solution according to claim 3, it is characterized in that, described heat-exchanger rig adopts the dividing wall type heat exchange of heat pipe, this dividing wall type heat exchange of heat pipe adopts heat pipe as heat transfer element, solution evaporator section and the condensation segment of heat pipe of flowing through respectively after high-temperature flue gas and the desulfurization.
5. the flue gas desulfur device that utilizes ammoniacal liquor and humate solution according to claim 4, it is characterized in that, described separation drying device comprises: cyclone hydraulic separators and steam dryer, wherein: the input of cyclone hydraulic separators is contacted with pipeline mutually with the condensation segment of dividing wall type heat exchange of heat pipe, and the output of cyclone hydraulic separators links to each other with steam dryer.
6. the flue gas desulfur device that utilizes ammoniacal liquor and humate solution according to claim 5, it is characterized in that, described remaining ammonia adsorbent equipment adopts fixed packed bed reactor, being shaped as of this fixed packed bed reactor is cylindrical, the employing column plate supports, and filler is the solid particle that solution obtains after separating drying after the desulfurization.
7. the sulfur method of described device according to claim 6 is characterized in that, may further comprise the steps:
Step 1, ammoniacal liquor and the humate solution for preparing sprayed in the tower with nozzle respectively from desulfurizing tower top;
Step 2, with air-introduced machine high-temperature flue gas is entered desulfurizing tower through sending into after the deduster dedusting after the heat exchange of heat pipe heat exchange is cooled to 80 ℃ from boiler, utilize the ammoniacal liquor and the humate solution desulfurization in desulfurizing tower that spray into, generation humic acid and ammonium sulfite;
Solution after step 3, the first desulfurization is collected the surge tank from the desulfurizing tower bottom, recycles in pump input desulfurizing tower, until the pH value is 3-4;
Step 4, will generate humic acid and ammonium sulfite solution input oxidation tank, through high-efficiency aerator with ammonium sulfite after the abundant oxidation, utilize pump after the heat exchange of heat pipe heat temperature raising is concentrated, state has reached capacity, carry out liquid-solid separation by high-pressure solution pump input cyclone hydraulic separators, then send into drier and carry out drying;
Step 5, the product after the drier evaporation drying is inserted adsorption tower as remaining ammonia adsorbent;
The flue gas that contains part residue ammonia after step 6, the desulfurization passes into from the adsorption tower bottom, and after adsorbent absorption, clean gas is discharged from top;
After the absorption of step 7, remaining ammonia adsorbent is saturated, from the discharging of adsorption tower bottom, namely get the ammonium compound fertilizer material.
8. sulfur method according to claim 7 is characterized in that, the concentration of the ammoniacal liquor described in the step 1 is that mass concentration is 5%～10%; The concentration of described humate solution is that mass concentration is 3%～5%.
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| CN 201010270581 CN101920158B (en) | 2010-09-02 | 2010-09-02 | Flue gas desulfurization device utilizing ammonia water and humate solution and desulfurization method |
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| CN102784555A (en) * | 2012-08-19 | 2012-11-21 | 浙江海洋学院 | Method for strengthening seawater desulphurization by sodium fulvic acid |
| CN104722183B (en) * | 2015-03-02 | 2016-07-27 | 内蒙古阜丰生物科技有限公司 | The process technique of the flue gas that one seed amino acid preparation process produces |
| CN104722199B (en) * | 2015-03-02 | 2016-07-27 | 内蒙古阜丰生物科技有限公司 | The smoke abatement of amino acids production technique takes off dust collecting method |
| CN104722165B (en) * | 2015-03-03 | 2016-02-24 | 内蒙古阜丰生物科技有限公司 | A kind of environment-protective process purifying amino acids production tail gas |
| CN110038408A (en) * | 2019-04-25 | 2019-07-23 | 上海第二工业大学 | A kind of sugar refinery exhaust-gas resource utilizes and minimum discharge purification method and device |
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| CN101579602A (en) * | 2009-06-12 | 2009-11-18 | 山西晋丰环保工程设计有限公司 | Energy-saving and high-quality ammonia desulphurization process for ammonia sulfate recovery |
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| CN101579602A (en) * | 2009-06-12 | 2009-11-18 | 山西晋丰环保工程设计有限公司 | Energy-saving and high-quality ammonia desulphurization process for ammonia sulfate recovery |
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