CN205073865U - Hierarchical absorption desulphurization unit of ammonia - ammonium sulfate method - Google Patents
Hierarchical absorption desulphurization unit of ammonia - ammonium sulfate method Download PDFInfo
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- CN205073865U CN205073865U CN201520782344.2U CN201520782344U CN205073865U CN 205073865 U CN205073865 U CN 205073865U CN 201520782344 U CN201520782344 U CN 201520782344U CN 205073865 U CN205073865 U CN 205073865U
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Abstract
The utility model discloses a hierarchical absorption desulphurization unit of ammonia - ammonium sulfate method, including flue gas desulfurization absorption tower, absorption liquid circulating slot, thin paste liquid circulating slot and wet -type electrostatic precipitator, including concentrated slurry circulating slot from bottom to top, concentrated pre -absorption section, absorption section, thin paste liquid washing section and demisting section in the flue gas desulfurization absorption tower, concentration pre -absorption section includes that at least one deck concentrated slurry sprays the layer, absorbs the section and sprays the layer including absorption liquid whirl defogging liquid trap and at least one deck absorption liquid, and thin paste liquid washing section sprays the layer including thin paste liquid whirl defogging liquid trap and thin paste liquid, and demisting section includes that defroster and demister washing spray the layer. The utility model discloses accomplish processes such as flue gas cooling, hierarchical defogging are absorbed, segmentation oxidation on the absorption tower, through adjustment ammonifying point position having improved the ammonia utilization ratio, though solved traditional desulfurization absorption tower each section thick liquid of segmentation and carry seriously, it is unsatisfactory to result in each section slurry concentration to control, only the too high problem of aerosol content of flue gas aerosol.
Description
Technical field
The utility model relates to a kind of desulfurizer, is specifically related to a kind of classification Absorption Desulfurization device of ammonia ammonium sulphate process, is a kind of flue gas desulfur device being applicable to ammonia ammonium sulphate process.
Background technology
Ammonia ammonium sulphate process flue gas desulfurization technique, at the sulfur removal technology of chemical industry as a kind of main flow, effectively solves the process problem of enterprises deposed ammonia (concentration is about 5%), in order to produce ammonium sulfate, realizes " treatment of wastes with processes of wastes against one another, comprehensive utilization ".
Existing ammonia ammonium sulphate process desulfur technology also exists following weak point in through engineering approaches application:
1) ammonia utilization rate is not high, and the escaping of ammonia is higher.
The ammonia ammonium sulphate process desulfurizer ammonia consumption of current operation is generally about 1.05 ~ 1.15 times of theory calculate, the coal (8000 hours running times of year) using 1% sulfur content with the boiler of a 240t/h is considered, then the operation cost that in annual desulfurizer, desulfurizing agent (ammoniacal liquor) dosage increases higher than theoretical value just reaches about 700,000 yuan; Excessive the adding of desulfurizing agent (ammoniacal liquor) adds aerocolloidal generation simultaneously.
2) flue gas aerosol content is high, and plume hangover is serious.
In ammonia ammonium sulphate process sulfur removal technology, in desulfurizing tower exiting flue gas, steam mostly is saturation state, and carries the droplet containing aerosol level particle diameters such as desulfurization absorbents simultaneously.After desulfurization neat stress by smoke stack emission to Atmospheric processes time, because temperature reduces, in flue gas, supersaturation water steam is in Aerosol Surface condensation, due to Action of Gravity Field, is formed " sulphur ammonium rain ", and plume hangover prolongs continuous several kilometers, forms serious visual pollution.
Utility model content
The purpose of this utility model is to solve the problem, and provides a kind of and improves absorbent utilization ratio, effectively reduce the classification Absorption Desulfurization device of aerosol discharge in desulfurization fume.
The utility model solves the scheme that its technical problem adopts:
A classification Absorption Desulfurization device for ammonia ammonium sulphate process, comprises fume desulfurating absorption tower 1, absorbing liquid circulating slot 2, dilute slurry circulating slot 3 and wet electrical dust precipitator 20; Concentrated slurry circulating slot 4 from bottom to top, concentrated pre-absorption section, absorber portion, dilute slurry washing section and demist section is comprised in described fume desulfurating absorption tower 1; Described concentrated slurry circulating slot 4 is arranged on fume desulfurating absorption tower 1 bottom, as a part for desulfuration absorbing tower, described concentrated pre-absorption section comprises at least one deck concentrated slurry spraying layer 12, described absorber portion comprises absorbing liquid vortex-flow and defrosting liquid trap 13 from bottom to top and at least one deck absorbing liquid spraying layer 14, described dilute slurry washing section comprises dilute slurry vortex-flow and defrosting liquid trap 15 from bottom to top and dilute slurry spraying layer 17, and described demist section comprises demister 18 from below to up and mist eliminator flushing spraying layer 19; Arranging wet electrical dust precipitator 20 at fume desulfurating absorption tower 1 top makes flue gas enter wet electrical dust precipitator 20 through fume desulfurating absorption tower 1 top exhanst gas outlet; Be provided with absorption tower oxidation air distributor pipe 10 and jet mixing distributor pipe 9 (ammoniacal liquor distribution is completed by jet mixing distributor pipe) in the bottom of described concentrated slurry circulating slot 4, concentrated slurry circulating slot 4 exports and is connected with the concentrated slurry spraying layer 12 in concentrated pre-absorption section through concentrated slurry circulating pump 5, concentrated slurry circulation pipe 24; Be provided with flue entrance 11 in described concentrated pre-absorption section, pre-concentration absorber portion is connected by flue entrance 11 with air inlet flue, and described flue entrance 11 is positioned at below concentrated slurry spraying layer 12; Described absorbing liquid circulating slot 2 is connected with described absorbing liquid spraying layer 14 through absorbing liquid circulating pump 6, absorbing liquid circulation pipe 27, described absorbing liquid vortex-flow and defrosting liquid trap 13 is connected with absorbing liquid circulating slot 2 through absorbing liquid return duct 26, drop on absorbing liquid vortex-flow and defrosting liquid trap 13 after absorbing liquid circulated sprinkling, the liquid trap leakage fluid dram flow by gravity of self-absorption liquid vortex-flow and defrosting liquid trap 13 bottom returns absorbing liquid circulating slot 2; Described absorbing liquid circulating slot 2 bottom is provided with absorbing liquid backflow distributor pipe 21 and absorbing liquid circulating slot oxidation air distributor pipe 22; Described dilute slurry circulating slot 3 is connected with described dilute slurry spraying layer 17 through dilute slurry circulating pump 7, dilute slurry circulation pipe 29, described dilute slurry vortex-flow and defrosting liquid trap 15 is connected with dilute slurry circulating slot 3 through dilute slurry return duct 28, drop on dilute slurry vortex-flow and defrosting liquid trap 15 through washing section packing layer 16 after dilute slurry circulated sprinkling, return dilute slurry circulating slot 3 from the liquid trap leakage fluid dram flow by gravity of dilute slurry vortex-flow and defrosting liquid trap 15 bottom.
Preferably, described concentrated pre-absorption section arranges 1 ~ 2 layer of concentrated slurry spraying layer 12, and described absorber portion arranges 3 ~ 4 layers of absorbing liquid spraying layer 14, and described dilute slurry washing section arranges 1 layer of dilute slurry spraying layer 17.
Preferably, described absorption tower oxidation air distributor pipe 10 is arranged on above jet mixing distributor pipe 9, carries with the gas phase reducing ammonia; The concentrated slurry jet-loop pipe 30 of described concentrated slurry circulating slot 4 top through outside is connected with jet mixing distributor pipe 9; Described concentrated slurry jet-loop pipe 30 is provided with jet-loop pump 8; Described concentrated slurry jet-loop pipe 30 is connected with weak aqua ammonia supply pipe in the porch of jet-loop pump 8, weak aqua ammonia, by the effect of jet-loop pump 8, by jet mixing distributor pipe 9 is entered concentrated slurry circulating slot 4 in after mixing in concentrated slurry jet-loop pipe 30.
As further preferably, all filter is installed at the porch pipeline of described concentrated slurry circulating pump 5, absorbing liquid circulating pump 6, dilute slurry circulating pump 7, jet-loop pump 8.
Preferably, described absorbing liquid circulating slot oxidation air distributor pipe 22 is arranged on above absorbing liquid backflow distributor pipe 21, carries with the gas phase reducing ammonia; Described absorbing liquid backflow distributor pipe 21 is connected with absorbing liquid return duct 26.Described absorbing liquid return duct 26 is connected with weak aqua ammonia supply pipe.
Preferably, described concentrated slurry circulation pipe 24 is provided with ammonium sulfate after-treatment device arm 25 in concentrated slurry circulating pump 5 outlet, when the concentrated slurry in concentrated slurry circulating slot 4 reaches density and the concentration of setting, squeeze into ammonium sulfate after-treatment device centrifugal drying.
Preferably, described concentrated pre-absorption section is provided with concentrated pre-absorption section liquid supplementation pipe 33, the concentrated pre-absorption section backwash layer that described concentrated pre-absorption section liquid supplementation pipe 33 is communicated with absorbing liquid circulation pipe 27 and is arranged in concentrated pre-absorption section, periodic flushing absorbing liquid vortex-flow and defrosting liquid trap 13; Described absorber portion is provided with absorber portion liquid supplementation pipe 32, the absorber portion backwash layer that described absorber portion liquid supplementation pipe 32 is communicated with dilute slurry circulation pipe 29 and is arranged in absorber portion, periodic flushing dilute slurry vortex-flow and defrosting liquid trap 15.
Preferably, described absorbing liquid vortex-flow and defrosting liquid trap 13 and dilute slurry vortex-flow and defrosting liquid trap 15 are vortex-flow and defrosting liquid trap, and described vortex-flow and defrosting liquid trap comprises vortex-flow and defrosting liquid trap base plate 41, multiplely rises inflator 37, eddy flow 34, sieve plate 35, demist baffle plate 36, falls liquid stay pipe 40, catch tray 39, liquid-leaking nozzle 38 and liquid trap leakage fluid dram 42; Described vortex-flow and defrosting liquid trap base plate 41 is provided with liquid trap leakage fluid dram 42 for being connected with absorbing liquid return duct 26 or dilute slurry return duct 28; Described liter bottom inflator 37 is fixed on vortex-flow and defrosting liquid trap base plate 41, and adjacent two row rise inflator 37 being staggered in corresponding room; Described inflator 37 inside that rises is provided with eddy flow 34, described eddy flow 34 is fixed on through described sieve plate 35 and rises on inflator 37 inwall, described inflator 37 top that rises is provided with annular demist baffle plate 36, be evenly distributed with and fall liquid stay pipe 40 for supporting catch tray 39 rising inflator 37 top, described catch tray 39 center is provided with liquid-leaking nozzle 38.Described sieve plate 35 comprises annular bottom plate and cylindric riser, the cylindric lower end of riser is fixedly connected with one end of annular bottom plate and makes sieve plate 35 vertical section in " L " type, the other end of base plate is fixed on and rises on inflator 37 inwall, the upper end of riser is used for fixing eddy flow 34, and described base plate is evenly provided with aperture.
As preferred further, the elevation angle of described eddy flow is 20 ~ 30 degree.Absorb practical operation according to flue gas desulfurization, the angle at the sub-elevation angle of eddy flow in absorbing liquid vortex-flow and defrosting liquid trap 13 and dilute slurry vortex-flow and defrosting liquid trap 15 can be adjusted.
Preferably, the classification Absorption Desulfurization device of the utility model ammonia ammonium sulphate process arranges 1-2 layer demister 18; Described demister 18 can adopt deflection plate demister also can select ridge type demister.Described mist eliminator flushing spraying layer 18 is connected with technique water pipe 31, there is provided fresh water (FW) to demister 18 periodic flushing by technique water pipe 31, ensure that demister 18 passage does not block, rinse spray liquid falls on dilute slurry vortex-flow and defrosting liquid trap 15, then from flowing back to dilute slurry circulating slot 3 as the moisturizing of dilute slurry spray.
Preferably, be provided with washing section packing layer 16 in described fume desulfurating absorption tower 1, described washing section packing layer 16 is arranged between dilute slurry vortex-flow and defrosting liquid trap 15 and dilute slurry spraying layer 17.
Preferably, overtemperature spraying layer is set at described gas approach 11.
As another preferred version of the present utility model, described wet electrical dust precipitator 20 can be arranged on fume desulfurating absorption tower 1 side, and fume desulfurating absorption tower 1 top exhanst gas outlet is connected with wet electrical dust precipitator 20 through flue.
The beneficial effects of the utility model:
The multiple functional section of classification Absorption Desulfurization device of the utility model ammonia ammonium sulphate process, comprises concentrated pre-absorption section, absorber portion, dilute slurry washing section and demist section, is concentrated pre-absorption section between concentrated slurry circulating slot top and absorbing liquid vortex-flow and defrosting liquid trap; Be absorber portion between absorbing liquid vortex-flow and defrosting liquid trap and dilute slurry vortex-flow and defrosting liquid trap; It is dilute slurry washing section between dilute slurry vortex-flow and defrosting liquid trap and demister; It is demist section between demister and wet electrical dust precipitator.The utility model completes the processes such as flue gas cooling, classification demist absorption, staged oxidation on an absorption tower, although solve traditional desulfuration absorbing tower segmentation but each section of slurries carry seriously, each section of concentration of slurry is caused to control undesirable, the problem that the aerocolloidal aerosol load of neat stress is too high, better improves ammonia utilization rate by adjustment ammonification point position simultaneously.Ammonia utilization rate can reach more than 99%.
Mainly there is following beneficial effect:
1) concentrated slurry circulating slot arranges oxidation air distributor pipe, effectively improves the oxidation efficiency of the supersaturated ammonium sulfate slurries of ammonium sulfate after-treatment device; The distribution of concentrated slurry circulating slot ammoniacal liquor is realized by jet mixing distributor pipe, ammoniacal liquor through jet-loop pump pressurization on jet mixing distributor pipe nozzle injection and with the blending of concentrated slurry circulating slot inner fluid, compared to arranging separately ammoniacal liquor distributor pipe (ammoniacal liquor distributor pipe generally only arranges distribution hole), effectively improve distribution consistency degree and the mixed effect of ammoniacal liquor.
2) absorbing liquid circulating slot is generally arranged in tower by the ammonia process of desulfurization, separated by top swash plate and concentrated pre-absorption section loop slurry, concentration cycles groove is arranged in tower by the utility model, thoroughly solve the problem in the blocking of swash plate place buildup when concentrated slurry excessive concentration, the decline of liquid level at the bottom of the simultaneously cancellation of swash plate and absorbing tower effectively reduces the height of desulfurizing tower, reduces cost of investment and energy consumption.
3) facts have proved that the concentration of contained particulate matters in neat stress after desulfurization is when other are consistent, the concentration of the last one deck sprayed slurry be in contact with it becomes positive correlation, bottom absorber portion and dilute slurry washing section, vortex-flow and defrosting liquid trap is set, the differentiation achieving the composition of slurries in concentrated slurry circulating slot, absorbing liquid circulating slot and dilute slurry circulating slot, concentration, acid-base value and oxidizability controls, thus concentration of slurry in dilute slurry circulating slot is controlled within 1% ~ 3%, to reduce the concentration of contained particulate matters in neat stress after desulfurization; Upper strata leakage is simultaneously formed and absorbs liquid film, to SO in flue gas on eddy flow
2there is certain supplementary absorption.
Accompanying drawing explanation
Fig. 1 is the structural representation of the classification Absorption Desulfurization device of the utility model ammonia ammonium sulphate process;
Fig. 2 is the structural representation of vortex-flow and defrosting liquid trap in the classification Absorption Desulfurization device of the utility model ammonia ammonium sulphate process;
Fig. 3 is that the A-A of Fig. 2 vortex-flow and defrosting liquid trap is to sectional view;
Fig. 4 is that the B of Fig. 3 is to figure;
In figure, 1-fume desulfurating absorption tower, 2-absorbing liquid circulating slot, 3-dilute slurry circulating slot, 4-concentrated slurry circulating slot, 5-concentrated slurry circulating pump, 6-absorbing liquid circulating pump, 7-dilute slurry circulating pump, 8-jet-loop pump, 9-jet mixing distributor pipe, 10-absorption tower oxidation air distributor pipe, 11-flue entrance, 12-concentrated slurry spraying layer, 13-absorbing liquid vortex-flow and defrosting liquid trap, 14-absorbing liquid spraying layer, 15-dilute slurry vortex-flow and defrosting liquid trap, 16-washing section filler, 17-dilute slurry spraying layer, 18-demister, 19-mist eliminator flushing spraying layer, 20-wet electrical dust precipitator, 21-absorbing liquid backflow distributor pipe, 22-absorbing liquid circulating slot oxidation air distributor pipe, 23-weak aqua ammonia supply pipe, 24-concentrated slurry circulation pipe, 25-remove ammonium sulfate after-treatment device arm, 26-absorbing liquid return duct, 27-absorbing liquid circulation pipe, 28-dilute slurry return duct, 29-dilute slurry circulation pipe, 30-concentrated slurry jet-loop pipe, 31-technique water pipe, 32-absorber portion liquid supplementation pipe, 33-concentrated pre-absorption section liquid supplementation pipe, 34-eddy flow, 35-sieve plate, 36-demist baffle plate, 37-rise inflator, 38-liquid-leaking nozzle, 39-catch tray, 40-liquid stay pipe falls, 41-vortex-flow and defrosting liquid trap base plate, 42-liquid trap leakage fluid dram.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described further, but following content does not form the restriction to the utility model protection domain.
As Figure 1-Figure 4, a kind of classification Absorption Desulfurization device of ammonia ammonium sulphate process, comprises fume desulfurating absorption tower 1, absorbing liquid circulating slot 2, dilute slurry circulating slot 3 and wet electrical dust precipitator 20; Concentrated slurry circulating slot 4 from bottom to top, concentrated pre-absorption section, absorber portion, dilute slurry washing section and demist section is comprised in described fume desulfurating absorption tower 1.Described concentrated pre-absorption section comprises 1 ~ 2 layer of concentrated slurry spraying layer 12, described absorber portion comprises absorbing liquid vortex-flow and defrosting liquid trap 13 from bottom to top and 3 ~ 4 layers of absorbing liquid spraying layer 14, described dilute slurry washing section comprises dilute slurry vortex-flow and defrosting liquid trap 15, washing section packing layer 16 and 1 layer of dilute slurry spraying layer 17 from bottom to top, and described demist section comprises demister 18 from below to up and mist eliminator flushing spraying layer 19; At fume desulfurating absorption tower 1 top, wet electrical dust precipitator 20 is set.
It is inner that concentrated slurry circulating slot 4 is arranged on fume desulfurating absorption tower 1, as a part for fume desulfurating absorption tower 1, absorption tower oxidation air distributor pipe 10 and jet mixing distributor pipe 9 (ammoniacal liquor distribution is completed by jet mixing distributor pipe 9) is provided with in the bottom of described concentrated slurry circulating slot 4, absorption tower oxidation air distributor pipe 10 is arranged on above jet mixing distributor pipe 9, carries with the gas phase reducing ammonia; The concentrated slurry jet-loop pipe 30 of described concentrated slurry circulating slot 4 top through being arranged on fume desulfurating absorption tower 1 outside is connected with jet mixing distributor pipe 9; Described concentrated slurry jet-loop pipe 30 is provided with jet-loop pump 8; Described concentrated slurry jet-loop pipe 30 is connected with weak aqua ammonia supply pipe in the porch of jet-loop pump 8, weak aqua ammonia is by the effect of jet-loop pump 8, enter in concentrated slurry circulating slot 4 by jet mixing distributor pipe 9 after mixing in concentrated slurry jet-loop pipe 30, determined the addition of weak aqua ammonia by the pH of concentrated slurry, in concentrated slurry circulating slot 4, the pH value of concentrated slurry controls between 5.0 ~ 5.5.Described concentrated slurry circulating slot 4 exports and is connected with the concentrated slurry spraying layer 12 in concentrated pre-absorption section through concentrated slurry circulating pump 5, concentrated slurry circulation pipe 24; Be provided with flue entrance 11 in described concentrated pre-absorption section, pre-concentration absorber portion is connected by flue entrance 11 with air inlet flue, and described flue entrance 11 is positioned at below concentrated slurry spraying layer 12, and former flue gas enters concentrated pre-absorption section by gas approach 11; The coverage rate of every layer of concentrated slurry spraying layer 12 spray is 150% ~ 200%, and concentrated slurry spraying layer 12 is made up of concentrated slurry distributor pipe, nozzle and brace summer etc., carries out concentrated pre-absorption, absorption portion SO by spray concentrated slurry to flue gas
2flue gas cool-down after concentrated pre-absorption, and enter into absorber portion by absorbing liquid vortex-flow and defrosting liquid trap 13, the liquid containing ammonium sulfate drop major part that flue gas carries is tackled by eddy flow 34, sieve plate 35 is fallen into along rising inflator 37 inwall, be back to concentrated slurry circulating slot 4, thus reduce the volume of ammonium sulfate that concentrated pre-absorption section is carried to absorber portion, realize the control of the concentration of absorber portion, pH value and oxidizability.
Described absorbing liquid circulating slot 2 is connected with described absorbing liquid spraying layer 14 through absorbing liquid circulating pump 6, absorbing liquid circulation pipe 27, the coverage rate of every layer of absorbing liquid spraying layer 14 spray is 150% ~ 200%, absorbing liquid spraying layer 14 is made up of absorbing liquid distributor pipe, nozzle and brace summer etc., wherein one deck is for subsequent use, to prevent from causing SO in flue gas due to the change of ature of coal
2abnormal increase, described absorbing liquid vortex-flow and defrosting liquid trap 13 is connected with absorbing liquid circulating slot 2 through absorbing liquid return duct 26.Flue gas through absorber portion process continues to rise, dilute slurry washing section is entered into by dilute slurry vortex-flow and defrosting liquid trap 15, the liquid containing ammonium sulfate drop major part that flue gas carries is tackled by eddy flow 34, sieve plate 35 is fallen into along rising inflator 37 inwall, be back to absorber portion, thus reducing the volume of ammonium sulfate being carried to dilute slurry washing section from absorber portion, the concentration realizing dilute slurry washing section controls; Absorbing liquid circulated sprinkling rear section is directly dropped on vortex-flow and defrosting liquid trap base plate 41, by falling on liquid stay pipe 40 to vortex-flow and defrosting liquid trap base plate 41 after on the catch tray 39 that part drops on absorbing liquid vortex-flow and defrosting liquid trap 13, eventually through liquid trap leakage fluid dram 42 flow by gravity to absorbing liquid circulating slot 2.Described absorbing liquid return duct 26 is connected with weak aqua ammonia supply pipe, is controlled the pH value of absorbing liquid by the weak aqua ammonia amount added, and weak aqua ammonia, in absorbing liquid return duct 26 and after absorbing liquid mixing, enters the absorbing liquid backflow distributor pipe 21 in absorbing liquid circulating slot 2; Oxidation air is added in absorbing liquid circulating slot 2 by absorbing liquid circulating slot oxidation air distributor pipe 22.
Described dilute slurry circulating slot 3 is connected with described dilute slurry spraying layer 17 through dilute slurry circulating pump 7, dilute slurry circulation pipe 29, and described dilute slurry vortex-flow and defrosting liquid trap 15 is connected with dilute slurry circulating slot 3 through dilute slurry return duct 28; Washing section packing layer 16 effectively achieves the uniform of flue gas, the part liquid containing ammonium sulfate droplet particle interception of simultaneously will carry in flue gas; Dilute slurry spraying layer 17 circulated sprinkling reduces the content of ammonium sulfate in the liquid containing ammonium sulfate droplet particle carried in flue gas further, the SO simultaneously more than further absorption of residual
2circulated sprinkling rear section dilute slurry drops on vortex-flow and defrosting liquid trap base plate 41 through washing section packing layer 16, by falling on liquid stay pipe 40 to vortex-flow and defrosting liquid trap base plate 41 after on the catch tray 39 that part drops on dilute slurry vortex-flow and defrosting liquid trap 15, be finally all back to dilute slurry circulating slot 3 by liquid trap leakage fluid dram.
In described demist section, demister 18 and mist eliminator flushing spraying layer 19 are set, mist eliminator flushing spraying layer 19 is connected with technique water pipe 31, adopt fresh water (FW) periodic flushing spray demister 18, ensure that demister 18 passage does not block, rinse spray liquid falls on dilute slurry vortex-flow and defrosting liquid trap 15, then from flowing back to dilute slurry circulating slot 3 as the moisturizing of dilute slurry spray.Described demister 18 can adopt deflection plate demister also can select ridge type demister, arranges 1-2 layer.
Described absorbing liquid vortex-flow and defrosting liquid trap 13 and dilute slurry vortex-flow and defrosting liquid trap 15 are vortex-flow and defrosting liquid trap, and described vortex-flow and defrosting liquid trap comprises vortex-flow and defrosting liquid trap base plate 41, multiplely rises inflator 37, eddy flow 34, sieve plate 35, demist baffle plate 36, falls liquid stay pipe 40, catch tray 39, liquid-leaking nozzle 38 and liquid trap leakage fluid dram 42; Described vortex-flow and defrosting liquid trap base plate 41 is provided with liquid trap leakage fluid dram 42 for being connected with absorbing liquid return duct 26 or dilute slurry return duct 28; Described liter bottom inflator 37 is fixed on vortex-flow and defrosting liquid trap base plate 41, and adjacent two row rise inflator 37 being staggered in corresponding room; Described inflator 37 inside that rises is provided with eddy flow 34, described eddy flow 34 is fixed on through described sieve plate 35 and rises on inflator 37 inwall, described inflator 37 top that rises is provided with annular demist baffle plate 36, be evenly distributed with and fall liquid stay pipe 40 for supporting catch tray 39 rising inflator 37 top, described catch tray 39 center is provided with liquid-leaking nozzle 38.Described sieve plate 35 comprises annular bottom plate and cylindric riser, the cylindric lower end of riser is fixedly connected with one end of annular bottom plate and makes sieve plate 35 vertical section in " L " type, the other end of base plate is fixed on and rises on inflator 37 inwall, the upper end of riser is used for fixing eddy flow 34, and described base plate is evenly provided with aperture.Described absorbing liquid vortex-flow and defrosting liquid trap 13 and dilute slurry vortex-flow and defrosting liquid trap 15 material selection two phase stainless steel, eddy flow 34 selects export-oriented plate.Fraction slurries drops on eddy flow 34 by liquid-leaking nozzle 38, forms one deck liquid film in eddy flow sub-surface, can rise and absorb SO
2effect, simultaneously to except under ammonium sulfate droplet play dissolution, prevent at eddy flow 34 and sieve plate 35 Crystallization Plugging.
Described concentrated slurry circulation pipe 24 is provided with ammonium sulfate after-treatment device arm 25 in concentrated slurry circulating pump 5 outlet, when the concentrated slurry in concentrated slurry circulating slot 4 reaches density and the concentration of setting, be delivered to ammonium sulfate after-treatment device centrifugal drying by removing ammonium sulfate after-treatment device arm 25.
Described concentrated pre-absorption section is provided with concentrated pre-absorption section liquid supplementation pipe 33, described concentrated pre-absorption section liquid supplementation pipe 33 is connected with absorbing liquid circulation pipe 27, there is provided the fluid infusion of concentrated pre-absorption section as flushing liquor by absorbing liquid circulating slot 2, through components such as the catch tray 39 of the concentrated pre-absorption section backwash layer periodic flushing absorbing liquid vortex-flow and defrosting liquid trap 13 that is connected with concentrated pre-absorption section liquid supplementation pipe 33, eddy flow 34 and sieve plates 35, prevent at component surface fouling and clogging passage.
Described absorber portion is provided with absorber portion liquid supplementation pipe 32, described absorber portion liquid supplementation pipe 32 is connected with dilute slurry circulation pipe 29, there is provided absorber portion fluid infusion as flushing liquor by dilute slurry circulating slot 3, through components such as the catch tray 39 of the absorber portion backwash layer periodic flushing dilute slurry vortex-flow and defrosting liquid trap 15 that is connected with absorber portion liquid supplementation pipe 32, eddy flow 34 and sieve plates 35, prevent at component surface fouling and clogging passage.
All filter is installed at described concentrated slurry circulating pump 5, absorbing liquid circulating pump 6, dilute slurry circulating pump 7, jet-loop pump 8 inlet duct, flue gas short circuit is formed to ensure that all nozzles can not block, filter housings material selection fiberglass, filter screen selects Hastelloy or Erosion-Resisting Non-metallic Materials.The necessary erosion resistant of impeller material of described concentrated slurry circulating pump 5, when slurry flow is less than 80% of design discharge in concentrated slurry circulation pipe 24, automatically enable stand-by pump, now the impeller of concentrated slurry circulating pump 5 may damage.
Arrange overtemperature spraying layer at described gas approach 11, to prevent flue gas mid-winter to the infringement of desulfurizing tower internals, spraying layer pipeline should select two phase stainless steel, and nozzle selects silicon carbide material.
When absorber portion concentration of slurry is too high, under the condition meeting material balance, absorbing liquid vortex-flow and defrosting liquid trap 13 can adopt thin pulp washing section slurries as flushing liquor.
It is 15% ~ 20% supersaturated ammonium sulfate solution that described concentrated slurry is preferably solid content, and the oxygenation efficiency of ammonium sulfate is more than 99.5%, and pH value is between 5.0 ~ 5.5; Absorbing liquid concentration specifically contains SO with the exhaust gas volumn of process and flue gas
2fixed; Dilute slurry should control at the ammonium sulfate slurries of concentration below 3%.The fluid infusion of dilute slurry is directly supplemented by mist eliminator flushing water and wet electrical dust precipitator flushing water etc.
In the unrestricted situation in space, ground on the scene, wet electrical dust precipitator 20 can be arranged on fume desulfurating absorption tower 1 side, and fume desulfurating absorption tower 1 top exhanst gas outlet is connected with wet electrical dust precipitator 20 through flue.
Embodiment 1
Process 240t/h pulverized-coal fired boiler flue gas, under declared working condition, its exhaust gas volumn is 280000Nm
3/ h, the former flue-gas temperature 125 DEG C of flue entrance 11, SO
2concentration 2500mg/Nm
3, dust content 20mg/Nm
3.Fume desulfurating absorption tower 1 is carbon steel lining glass flake material, high 32m, diameter is 7.2m, and wherein concentrated slurry circulating slot 4 Liquid level is at 5.5m ~ 6m, divide into jet mixing distributor pipe 9 and the absorption tower oxidation air distributor pipe 10 of FRP material, oxidation air amount is 1800Nm
3/ h.Concentrated pre-absorption section arranges 1 layer of concentrated slurry spraying layer 12, and material is 2205 two phase stainless steels, and flow is 400m
3/ h, spray coverage rate 150%; Above concentrated slurry spraying layer 12, arrange the backwash spraying layer of 1 layer of concentrated pre-absorption section backwash layer as absorbing liquid vortex-flow and defrosting liquid trap 13, material is high temperature resistant FRP, intermittent shower, and one hour spray once, each lasting 3 minutes, sprays 6m at every turn
3.Absorber portion absorbing liquid vortex-flow and defrosting liquid trap 13 material is 2205 two phase stainless steels, the blade outer end diameter 950mm of eddy flow, 25 degree, the elevation angle, sieve plate 35 perforate ratio is 1.5%, absorbing liquid vortex-flow and defrosting liquid trap 13 vapour lock is 350Pa, and leakage rate is 0.5%, and demisting efficiency is 85%; Arrange 3 layers of absorber portion absorbing liquid spraying layer 14 altogether, material is FRP, interlamellar spacing 2m, and every layer of spray flux is 400m
3/ h, every layer of spray coverage rate 150%, wherein, one deck is spare level, and absorbing liquid is the ammonium sulfate slurries of concentration 15%, above absorbing liquid spraying layer 14, arrange absorber portion backwash layer, material is FRP, intermittent shower, one hour spray once, each lasting 3 minutes, sprays 7m at every turn
3, backwash dilute slurry vortex-flow and defrosting liquid trap 15.Dilute slurry vortex-flow and defrosting liquid trap 15 material is 317 stainless steels, the blade outer end diameter 950mm of eddy flow, 25 degree, the elevation angle, and sieve plate 35 perforate ratio is 1%, and dilute slurry vortex-flow and defrosting liquid trap 15 vapour lock is 300Pa, and leakage rate is 0.5%, and demisting efficiency is 90%.Washing section packing layer 16 is highly 2m, is one deck corrugated plate packing; Arrange dilute slurry spraying layer 17 above washing section packing layer 16, spray flux is 200m
3/ h, spray coverage rate 150%, dilute slurry is the ammonium sulfate slurries of concentration 2%.The demister 18 of demist section is one deck flap demister, and vapour lock is 150Pa, and demisting efficiency is 98%.Flue gas, by after fume desulfurating absorption tower 1, enters wet electrical dust precipitator 20, further removing liquid containing ammonium sulfate aerosol.
Flue gas is by after the classification Absorption Desulfurization device process of the present embodiment ammonia ammonium sulphate process, and the neat stress of discharge draws data by detection:
Fume desulfurating absorption tower 1 smoke outlet flue fog drip content is 80mg/Nm
3, in the neat stress of wet electrical dust precipitator 20 exit, droplet content is 30mg/Nm
3;
In fume desulfurating absorption tower 1 smoke outlet flue gas, total aerosol (dirt) content is 10mg/Nm
3, in the neat stress of wet electrical dust precipitator 20 exit, total aerosol content is 4.9mg/Nm
3;
Ammonia utilization rate reaches more than 99%.
Embodiment 2
The classification Absorption Desulfurization device of the ammonia ammonium sulphate process of embodiment 1 is transformed, vortex-flow and defrosting liquid trap is only adjusted during transformation, be transformed into the device (device A) that absorbing liquid vortex-flow and defrosting liquid trap 13 is only set respectively, absorbing liquid vortex-flow and defrosting liquid trap 13 is neither set, the device (device B) of dilute slurry vortex-flow and defrosting liquid trap 15 is not set yet, pass into flue gas respectively, exhaust gas volumn is 270000Nm
3/ h, SO in flue gas
2concentration 2000mg/Nm
3.Compare with device B, device A vapour lock increases 180Pa, the volume of ammonium sulfate that concentrated pre-absorption section is carried to absorber portion is reduced to 0.4t/h by 2t/h, and absorber portion concentration of slurry is reduced to 12% by 30%, and in the neat stress of discharge, total aerosol (dirt) content is by 40mg/Nm
3be reduced to 20mg/Nm
3.
The utility model does not relate to the part prior art that maybe can adopt all same as the prior art and is realized.
Although here described by certain or some particular arrangement and illustrate the utility model, but its object do not lie in the described details of restriction, because various amendment and structure modify may be had within the scope of patent requirements, do not depart from utility model spirit.
Claims (10)
1. a classification Absorption Desulfurization device for ammonia ammonium sulphate process, is characterized in that comprising fume desulfurating absorption tower (1), absorbing liquid circulating slot (2), dilute slurry circulating slot (3) and wet electrical dust precipitator (20); Concentrated slurry circulating slot (4) from bottom to top, concentrated pre-absorption section, absorber portion, dilute slurry washing section and demist section is comprised in described fume desulfurating absorption tower (1); Described concentrated pre-absorption section comprises at least one deck concentrated slurry spraying layer (12), described absorber portion comprises absorbing liquid vortex-flow and defrosting liquid trap (13) from bottom to top and at least one deck absorbing liquid spraying layer (14), described dilute slurry washing section comprises dilute slurry vortex-flow and defrosting liquid trap (15) from bottom to top and dilute slurry spraying layer (17), and described demist section comprises demister (18) from below to up and mist eliminator flushing spraying layer (19); Arranging wet electrical dust precipitator (20) at fume desulfurating absorption tower (1) top makes flue gas enter wet electrical dust precipitator (20) through fume desulfurating absorption tower (1) top exhanst gas outlet; The bottom of described concentrated slurry circulating slot (4) is provided with absorption tower oxidation air distributor pipe (10) and jet mixing distributor pipe (9), and concentrated slurry circulating slot (4) is connected with the concentrated slurry spraying layer (12) in concentrated pre-absorption section through concentrated slurry circulating pump (5), concentrated slurry circulation pipe (24); Flue entrance (11) is provided with in described concentrated pre-absorption section, pre-concentration absorber portion is connected by flue entrance (11) with air inlet flue, and described flue entrance (11) is positioned at concentrated slurry spraying layer (12) below; Described absorbing liquid circulating slot (2) is connected with described absorbing liquid spraying layer (14) through absorbing liquid circulating pump (6), absorbing liquid circulation pipe (27), and described absorbing liquid vortex-flow and defrosting liquid trap (13) is connected with absorbing liquid circulating slot (2) through absorbing liquid return duct (26); Described absorbing liquid circulating slot (2) bottom is provided with absorbing liquid backflow distributor pipe (21) and absorbing liquid circulating slot oxidation air distributor pipe (22); Described dilute slurry circulating slot (3) is connected with described dilute slurry spraying layer (17) through dilute slurry circulating pump (7), dilute slurry circulation pipe (29), and described dilute slurry vortex-flow and defrosting liquid trap (15) is connected with dilute slurry circulating slot (3) through dilute slurry return duct (28).
2. the classification Absorption Desulfurization device of ammonia ammonium sulphate process according to claim 1, is characterized in that described absorption tower oxidation air distributor pipe (10) is arranged on jet mixing distributor pipe (9) top; The concentrated slurry jet-loop pipe (30) of described concentrated slurry circulating slot (4) top through being arranged on fume desulfurating absorption tower (1) outside is connected with jet mixing distributor pipe (9); Described concentrated slurry jet-loop pipe (30) is provided with jet-loop pump (8); Described concentrated slurry jet-loop pipe (30) is connected with weak aqua ammonia supply pipe in the porch of jet-loop pump (8).
3. the classification Absorption Desulfurization device of ammonia ammonium sulphate process according to claim 2, is characterized in that all being provided with filter at the porch pipeline of described concentrated slurry circulating pump (5), absorbing liquid circulating pump (6), dilute slurry circulating pump (7), jet-loop pump (8).
4. the classification Absorption Desulfurization device of ammonia ammonium sulphate process according to claim 1, is characterized in that described absorbing liquid circulating slot oxidation air distributor pipe (22) is arranged on absorbing liquid backflow distributor pipe (21) top; Described absorbing liquid backflow distributor pipe (21) is connected with absorbing liquid return duct (26); Described absorbing liquid return duct (26) is connected with weak aqua ammonia supply pipe.
5. the classification Absorption Desulfurization device of ammonia ammonium sulphate process according to claim 1, is characterized in that described concentrated slurry circulation pipe (24) is provided with ammonium sulfate after-treatment device arm (25) in concentrated slurry circulating pump (5) outlet.
6. the classification Absorption Desulfurization device of ammonia ammonium sulphate process according to claim 1, it is characterized in that described concentrated pre-absorption section is provided with concentrated pre-absorption section liquid supplementation pipe (33), the concentrated pre-absorption section backwash layer that described concentrated pre-absorption section liquid supplementation pipe (33) is communicated with absorbing liquid circulation pipe (27) and is arranged in concentrated pre-absorption section, periodic flushing absorbing liquid vortex-flow and defrosting liquid trap (13); Described absorber portion is provided with absorber portion liquid supplementation pipe (32), the absorber portion backwash layer that described absorber portion liquid supplementation pipe (32) is communicated with dilute slurry circulation pipe (29) and is arranged in absorber portion, periodic flushing dilute slurry vortex-flow and defrosting liquid trap (15).
7. the classification Absorption Desulfurization device of ammonia ammonium sulphate process according to claim 1, it is characterized in that described absorbing liquid vortex-flow and defrosting liquid trap (13) and dilute slurry vortex-flow and defrosting liquid trap (15) are vortex-flow and defrosting liquid trap, described vortex-flow and defrosting liquid trap comprises vortex-flow and defrosting liquid trap base plate (41), multiplely rises inflator (37), eddy flow (34), sieve plate (35), demist baffle plate (36), falls liquid stay pipe (40), catch tray (39), liquid-leaking nozzle (38) and liquid trap leakage fluid dram (42); Described vortex-flow and defrosting liquid trap base plate (41) is provided with liquid trap leakage fluid dram (42) for connecting absorbing liquid return duct (26) or dilute slurry return duct (28); Described inflator (37) bottom that rises is fixed on vortex-flow and defrosting liquid trap base plate (41), and adjacent two row rise inflator (37) being staggered in corresponding room; Described inflator (37) inside that rises is provided with eddy flow (34), described eddy flow (34) is fixed on through described sieve plate (35) and rises on inflator (37) inwall, described inflator (37) top that rises is provided with annular demist baffle plate (36), be evenly distributed with and fall liquid stay pipe (40) for supporting catch tray (39) rising inflator (37) top, described catch tray (39) center is provided with liquid-leaking nozzle (38).
8. the classification Absorption Desulfurization device of ammonia ammonium sulphate process according to claim 7, it is characterized in that described sieve plate (35) comprises annular bottom plate and cylindric riser, the cylindric lower end of riser is fixedly connected with one end of annular bottom plate, the other end of base plate is fixed on and rises on inflator (37) inwall, the upper end of riser is used for fixing eddy flow (34), and described base plate is evenly provided with aperture.
9. the classification Absorption Desulfurization device of ammonia ammonium sulphate process according to claim 1, is characterized in that described mist eliminator flushing spraying layer (19) is connected with technique water pipe (31); Described demister (18) is deflection plate demister or ridge type demister.
10. the classification Absorption Desulfurization device of ammonia ammonium sulphate process according to claim 1, it is characterized in that being provided with washing section packing layer (16) in described fume desulfurating absorption tower (1), described washing section packing layer (16) is arranged between dilute slurry vortex-flow and defrosting liquid trap (15) and dilute slurry spraying layer (17).
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| CN201520782344.2U CN205073865U (en) | 2015-10-10 | 2015-10-10 | Hierarchical absorption desulphurization unit of ammonia - ammonium sulfate method |
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| CN201520782344.2U CN205073865U (en) | 2015-10-10 | 2015-10-10 | Hierarchical absorption desulphurization unit of ammonia - ammonium sulfate method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105148712A (en) * | 2015-10-10 | 2015-12-16 | 中石化南京工程有限公司 | Multi-stage absorbing desulfurizing device by adopting ammonia-ammonium sulfate method |
| CN105749704A (en) * | 2016-05-14 | 2016-07-13 | 张波 | Ammonium sulphite desulphurization system and process |
| CN106237855A (en) * | 2016-08-30 | 2016-12-21 | 杭州玺清环保科技有限公司 | A kind of absorption tower for ultralow desulfurization |
| CN106512662A (en) * | 2016-11-15 | 2017-03-22 | 中石化南京工程有限公司 | Dust removing method and device for catalytic-cracking fume |
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2015
- 2015-10-10 CN CN201520782344.2U patent/CN205073865U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105148712A (en) * | 2015-10-10 | 2015-12-16 | 中石化南京工程有限公司 | Multi-stage absorbing desulfurizing device by adopting ammonia-ammonium sulfate method |
| CN105148712B (en) * | 2015-10-10 | 2017-11-14 | 中石化南京工程有限公司 | A kind of classification Absorption Desulfurization device of ammoniacal ammonium sulphate method |
| CN105749704A (en) * | 2016-05-14 | 2016-07-13 | 张波 | Ammonium sulphite desulphurization system and process |
| CN106237855A (en) * | 2016-08-30 | 2016-12-21 | 杭州玺清环保科技有限公司 | A kind of absorption tower for ultralow desulfurization |
| CN106512662A (en) * | 2016-11-15 | 2017-03-22 | 中石化南京工程有限公司 | Dust removing method and device for catalytic-cracking fume |
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