Technical apparatus of smoke preventing and dust controlling, desulfurizing and denitrifying for inversed fire-grage spreader stroker boiler
The utility model relates to the smoke abatement and dust control of the tail flue gas of industry coal-boiler and takes off SO
2Take off NO
xTechnique device particularly for the spreader stoker boliler, the CFBB that solve severe overweight exhaust emission environment, has great popularizing value, and is better for the grate firing chain-grate boiler effect of each industry model.
At present, the numb stone water-film Separator of supporting spreader stoker boliler, CFBB, dry type multi-tube dust cleaner, fiber bag precipitator, cyclone dust collectors, all the ubiquity dust removing effects is poor for electrostatic precipitator etc., can not eliminate the harmful substance in black smoke and the black smoke, particularly SO
2, NO
xCarcinogen, though numb stone water-film Separator is a wet scrubber, desulfuration efficiency is low, and water consumption is big, and floor space is big, and the operating cost height though the electrostatic precipitator efficiency of dust collection is higher, can not be deviate from SO
2, NO
xThe clean-up effect of the above greatly in a word all kinds of dedusters of harmful substance cost height, floor space is not ideal enough.Every technical indicator does not reach national environmental protection regulation, GB13271-91 atmosphere pollutants emission standards; Though the wet scrubber now promoted the use of of country has desulfurizing function is arranged also, but can not satisfy the class area discharge standard of national environmental protection regulation, and have serious etching problem, the air-introduced machine entraining water problem, the comprehensive purifying effect is bad, does not reach customer satisfaction system requirement and standard.The people look forward to that the coal tiger of administering is a great problem on smoke dispersal, dust removal and desulphurization is administered always for many years, are country's " eight or five " " 95 " environmental protection brainstorm subjects.
This is new to be serious coal-fired spreader stoker boliler of contaminated solution and CFBB prior art deficiency with novel purpose, has proposed one kind of multiple functions, the practical purification techniques device that effect is better.The best practical technology product that this device and existing State Bureau of Environmental Protection promote is compared, and has the structural principle novelty, and volume is little, the manufacturing cost cost is low, and operating maintenance is easy to use, and operating cost is few, comprehensive purifying efficient height, characteristics such as acid-alkali-corrosive-resisting long service life.
The technical solution of the utility model realizes by following manner: this technique device has adopted air blast formula spiral volute first class purification chamber; Multitube secondary purification tower; Gas-liquid separator, demister; Utilizing alkalies to swash the atomizing vortex by force separates, inertial separation, wet separation reaches desirable clean-up effect, it forms structure and mainly contain: the ash-laden gas that boiler combustion is discharged is by horizontal gas approach [1], air blast formula spiral volute first class purification chamber [2], be provided with several stainless steel shower nozzles of multilayer in the horizontal flue gas inlet tube and swash ash-laden gas [3] by force, horizontal flue gas inlet tube turning also is provided with some stainless steel arc deflectors [4], after flue gas enters the spiral volute, the stainless steel shower 45 spray orifice that horizontal flue gas inlet tube portion turning arranged again is impulse flue gas [5] once more, flue gas each position that rotates four circles in the spiral volute is provided with several stainless steel shower nozzles [6], both sides, spiral volute bottom are provided with arc air inducing flowing water plate [7], vortex shell bottom sewage is [8] also, the sewer of boiler is by blow-off pipe [9], go into cesspool, be provided with three grades of sedimentation basins on the cesspool side and add the calcium hydroxide water treatment, demineralized water is guaranteed PH
10More than, again through stainless steel circulating pump [10], feed pipe injects the first class purification chamber, recycle in the secondary purification tower, spiral volute inner chamber top is provided with central gas duct pipe [11], flue tube is connected with spiral volute end, flue gas behind the first class purification is sent into multitube secondary purification tower [12], be provided with central tube [13] in the purifying column, several multitubes of ring [14], through several stainless steel shower nozzles [15], the strong sharp meticulous purification of secondary, clean flue gas after the purification is through secondary purification tower bottom flue outlet [16], the spiral flue tube enters, gas-liquid separator [17], several spiral guide plates of multilayer discontinuous [18] in the separator, remove drop [19] in the flue gas through ring shelves tank, again through the exit stainless steel three folding shutter formula flow deflector demisters [20] of gas-liquid separation upper end, clean flue gas is sent into flue tube [21], enter atmosphere by the air-introduced machine smokestack.Establish water seal blowoff basin [22] at multitube secondary purification tower and gas-liquid separator bottom, flow into three grades of sedimentation basin closed cycles uses.Establishing U type water seal [23] in the flue tube bottom influences dynamic balancing in order to avoid drop enters draught fan impeller, and the corrosion air-introduced machine guarantees that boiler normally moves.For ease of checking, observe and clean draught fan impeller, the air-introduced machine shell on the lower side portion establish inspection socket.This whole series technique device, owing to adopted vortex, inertia, wet separation, utilize boiler blowdown water and added quantitative running water, calcium hydroxide is as desulfurizing agent, flue dust and harmful substance have been purified effectively, thereby reached better clean-up effect, the results showed, the flue dust original concentration lingemann blackness level Four Pyatyi of being discharged by coal-burning boiler drops to below the one-level; Dust concentration is dropped to below the 100 milligrams/mark cubic meter by 15000 milligrams/mark cubic meter, and efficiency of dust collection reaches more than 99%; Remove SO
2Efficient reaches more than 80%; Remove NO
xEfficient reaches more than 60%, and the clean flue gas that enters atmosphere meets national requirements for environmental protection GB13271-91 atmosphere pollution one class area discharge standard.For solving the spreader stoker boliler of the severe contamination of headache the most, CFBB provides best practicality good equipment, for improving existent environment of people, improves people's the bigger effect of general level of the health performance for the society whole world.
Description of drawings: the horizontal smoke pipe of 1-road import among the figure, 2-air blast formula spiral volute, several stainless steel shower nozzles of 3-, some stainless steel arc deflectors of 4-, 5-stainless steel shower 45 spray orifice, several stainless steel shower nozzles of 6-, 7-arc air inducing flowing water plate, 8-cesspool, 9-boiler water blow-down pipe, 10-stainless steel periodical feeding pump, 11-central gas duct pipe.12-multitube secondary purification tower, 13-central tube, several multitubes of 14-ring, several stainless steel shower nozzles of 15-, 16-exhanst gas outlet.The 17-gas-liquid separator, several spiral guide plates of 18-multilayer discontinuous, 19-ring shelves tank, 20-stainless steel three folding shutter flow deflector demisters, 21-flue tube, 22-water seal tank, the water seal of 23-U type.
