Desulphurizing and dust-removing integral equipment
Technical field
The utility model relates to a kind of boiler flue gas purification equipment, and more particularly, it relates to a kind of desulphurizing and dust-removing integral equipment.Be suitable for falling of sulfide in the fire coal boiler fume and dust removed and purification.
Background technology
Along with the fast development of China's industrial economy, industrial atmosphere pollutes serious day by day, and in the pollution of multiple industrial waste gas to atmosphere, coal-smoke pollution is outstanding, and has produced bigger harm.The formation of the increase of dust-laden thing and acid rain in the air, main cause are due to the coal-burning boiler institute discharged flue gas.Purify air, implement Blue Sky Project, press for the flue gas desulfurization and dedusting technology and equipment.At present, gas cleaning for coal-burning boiler, its kind mainly contains following several: single dedusting (as electrostatic precipitation, water film dedusting etc.) or single desulfurization (as technology such as furnace chamber spray calcium, alkali lye spray, the coal-fired cleaning agents of interpolation), and desulphurizing and dust-removing integral.Single dedusting or single desulfurization all can not realize the real purification of flue gas.Desulphurizing and dust-removing integral equipment is the effective technology of realizing that fire coal boiler fume purifies.At present, desulphurizing and dust-removing integral technology both domestic and external mainly contains wet type, half dry type desulphurization and dust removal integrated device.Wet-type desulfurize and dust removing integrated apparatus such as rotating stream tray scrubber wet process of FGD dust arrester, its technical characterictic is: by the spray of akaline liquid, sulfur in smoke and dust fallen remove; The defective of this technology is that the alkali lye in the spray system is influenced by flue-gas temperature, and easily spray pipeline or shower nozzle are stopped up in fouling, and equipment can't normally be moved, and have increased the maintenance of equipment, and have increased the required fittings cost of service equipment greatly; In addition, because spray liquid is an alkali lye, the atomizing effect of spray is not as water, and this has just reduced dust collection capacity.Use this technology, desulfurized effect is more obvious, but dust removal efficiency is not high.The half dry type desulphurization and dust removal integrated device, as the development of domestic certain company to have the flue gases purification of alkali lye haydite as working media, its know-why is: the haydite of spray alkali lye constitutes moistening bed, and can move continuously, when flue gas passes through bed, sulfur dioxide wherein and medium haydite surface alkaline reaction and be absorbed neutralization, flue dust by collision, hold back and effect such as diffusion by detention, flue gas is purified.The deficiency of this technology is: the motion of haydite be difficult to realize real evenly, the differing in size of gap between the haydite, the speed that makes flue gas penetrate the haydite layer does not wait on the one hand, and then influenced the clean-up effect of equipment, on the other hand, the running resistance of equipment has increased power consumption.The advantage of this technology has been effective liquid sprayer simple in structure, has solved the fouling of indissoluble material, blockage problem.
In addition, in to the fire coal boiler fume purification process, except that direct use desulphurization and dust removal integrated device, the employing that has the modes that combine of single dedusting and two kinds of equipment and technologies of single desulfurization, make in this way, the purifying rate of flue gas is than higher, but shortcoming is that investment is big, energy consumption is big, equipment operation inaccurate coordination, management is difficult, administrative expenses are high.
The purpose of this utility model exactly in order to solve the deficiencies in the prior art, provides that a kind of purifying rate height, long service life, maintenance cost are low, small investment, energy consumption be little, simple to operate, the fire coal boiler fume cleaning equipment with desulfurization and dust removal integrated function.
In order to address the above problem, the utility model adopts following technical proposals:
This use novel overall is made up of desulphurization system and dedusting two big systems, and desulphurization system is fallen hawk, desulfurization outer cylinder body chimney fan, feeder, air intake tube, desulfurization inner barrel, desulfurization inner barrel chimney fan by desulfurization thing outlet, desulfurization thing dislodger, desulfurization outer cylinder body, spiral and formed; Desulfurization outer cylinder body and desulfurization inner barrel are all cylindrical; The defeated material mouth of feeder links to each other with the air intake tube and communicates; Spiral falls hawk and is welded on the desulfurization outer cylinder body inwall; Desulfurization thing dislodger and the welding of desulfurization outer cylinder body become one; The lower end of desulfurization thing dislodger is a desulfurization thing outlet 1; The desulfurization inner barrel is in the desulfurization outer cylinder body, and is and fixedly connected with it, and the center line of two cylindrical shells coincides; The air intake tube links and communicates with tangential direction by welding with the upper end of desulfurization inner barrel; Desulfurization inner barrel chimney fan is welded on the lower end of desulfurization inner barrel, and its opening direction and desulfurization outer cylinder body are tangent.The desulphurization system structure is installed in the columniform housing, and its center line coincides.Dust pelletizing system mainly is made up of housing, homogenating plate, dirt pocket, spray thrower, depositing dust thing outlet, dividing plate etc.
The utility model compared with the prior art, by following beneficial effect: 1, purifying rate height: its dust reduction rate, sulfur dioxide clearance all reach more than 99.8%; 2, maintenance is little: be equivalent to 1/4 of like product; 3, long service life is equivalent to 3 times with life of product; 4, fittings cost is low; 5, simple to operate; 6, power consumption is little: be equivalent to 1/3 of like product; 7, small investment: be the 1/2--1/4 of similar desulfurization and dedusting engineering construction cost.
Description of drawings:
Fig. 1 is the utility model desulphurizing and dust-removing integral device structure schematic diagram
Fig. 2 is the structural representation of dirt pocket in the utility model structure
Fig. 3 is the structural representation of spray thrower in the utility model structure
Fig. 4 is the structural representation of homogenating plate in the utility model structure
Fig. 5 is the cross section cut-away view of desulphurization system in the utility model structure
Fig. 6 is the utility model workflow schematic diagram
Among the figure: hawk, 7 desulfurization outer cylinder body chimney fans, 8 homogenating plates, 9 dirt pockets, 10 spray throwers, 11 dividing plates, 12 backflow outlet housings, 13 water inlet pipes, 14 feeders, 15 air intake tubes, 16 desulfurization inner barrels, 17 desulfurization inner barrel chimney fans fall in 1 desulfurization thing outlet, 2 depositing dust thing outlets, 3 desulfurization thing dislodgers, 4 housings, 5 desulfurization outer cylinder bodies, 6 spirals.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is further described:
Shown in Fig. 1~6, in feeder 14, be filled with the graininess white lime (Ca (OH) of hygrometric state
2), during feeder work, hygrometric state Ca (OH)
2Uniform particles is sprayed onto in the air intake tube 15.Fire coal boiler fume is under the effect of air blast, from air intake tube and hygrometric state Ca (OH)
2Particle enters the desulfurization inner barrel 16 in the desulphurization system structure together, because the upper end of air intake tube and desulfurization inner barrel links with tangential direction by welding, so flue gas carries Ca (OH)
2Particle together in the desulfurization inner barrel with corkscrew motion, sedimentation; SO in this process in the flue gas
2Deng sulfur oxide by hygrometric state Ca (OH)
2Adsorption reaction generates nontoxic inorganic salts, SO
2Obtaining the first step falls and removes; Solid-solid inorganic salt and unreacted Ca (OH) that flue gas and desulfurization produce
2Particle after desulfurization inner barrel chimney fan 17 output of desulfurization inner barrel lower end, enters desulfurization outer cylinder body 5, and the spiral on being welded on the desulfurization outer cylinder body falls to spiral in the hawk 6 formed helicla flutes and moves upward; In this process, the SO that does not remove in the flue gas
2With Ca (OH)
2Particle carries out adsorption reaction, and second step of work falls and removes.Because screw settling helicla flute that plate forms is very long, SO
2With Ca (OH)
2Sufficient reacting, when flue gas arrives desulfurization outer cylinder body chimney fan 7, the SO that is contained in the flue gas
2Be removed more than 99.8% Deng sulfur oxide.Meanwhile, because the effect of hawk, the inorganic salt particle that desulphurization reaction produced, unreacted Ca (OH) fall in spiral
2Particle, and the part ash fall in the flue gas falls in the desulfurization thing dislodger 3; Desulfurization thing outlet 1 has the weighing and sensing valve, and when the precipitum in the desulfurization thing dislodger was stacked into constant weight, the valve of desulfurization thing outlet 1 was opened automatically, discharges precipitum, closes automatically again then.Flue gas is discharged from desulfurization outer cylinder body chimney fan 7, and spirals and rise to homogenating plate 8, and at this moment flue gas is subjected to the flushing from dirt pocket 9 flowing water, and the part dust in the flue gas drops to depositing dust thing outlet 2 places with depositing in water, and discharges; Simultaneously, flue-gas temperature is declined to a great extent.Flue gas continues to rise, and in homogenating plate is evenly distributed to dirt pocket 9.Dirt pocket 9 is that by polylith dividing plate 11 the top inner chamber of housing 4 to be separated to form 8 cross sections be that fan-shaped dirt pocket and 1 cross section is circular dirt pocket; In each dirt pocket, spray thrower 10 is installed, spray thrower is made up of with the transverse tube that has shower nozzle the ring pipe of shower nozzle multi-group, and a transverse tube is arranged directly over each ring pipe; Shower nozzle on the ring pipe is installed in opposite directions, and the shower nozzle on the transverse tube is installed downwards; After High-Pressure Water enters spray thrower from water inlet pipe 13, in each dirt pocket, form the water smoke district of the cone-shaped of a plurality of laminations.Flue gas is when penetrating layer by layer cone water smoke district, and the dust in the flue gas is thoroughly cleaned, and is deposited to depositing dust thing outlet 2 and discharges.Backflow outlet housing 12 is provided with the lost structure of waterproof, and when water smoke rose to the backflow outlet housing with flue gas stream, water smoke formed water droplet and refluxes, and has saved water.The flue gas that comes out from the backflow outlet housing is the gas of cleaning.
Except that coal-burning boiler the essential flue gas air inducing equipment of installing, the power consumption of flue gas desulfurization and dedusting mainly is feeder and the required high-pressure hydraulic pump of spray thrower work, these two energy consumptions are very little, are 1/3 of the required energy consumption of other desulfurization dust-removing technique; The water of flowing through in the spray thrower is neutral clean water, and being difficult on the one hand influences dedusting work because of fouling blocking pipeline or shower nozzle, has also prolonged the service life of equipment on the other hand, has reduced the maintenance of equipment, has reduced the replacing fittings cost; In addition, as long as feeder and the required water source pump operate as normal of equipment, desulfurization and dedusting work will normally be carried out, so the desulfurization of equipment and dedusting work are extremely coordinated, operates and manage very convenient.The utility model compact conformation, desulphurization system structure and dust pelletizing system structure have reduced the floor space of equipment in same cylindrical housings, and equipment volume is less relatively, and it is less that dirt produces cost, reduced the desulfurization and dedusting engineering construction cost.