CN203829898U - Sludge drying tail gas treatment device suitable for sludge treatment plant - Google Patents
Sludge drying tail gas treatment device suitable for sludge treatment plant Download PDFInfo
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- CN203829898U CN203829898U CN201420233484.XU CN201420233484U CN203829898U CN 203829898 U CN203829898 U CN 203829898U CN 201420233484 U CN201420233484 U CN 201420233484U CN 203829898 U CN203829898 U CN 203829898U
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- 238000001035 drying Methods 0.000 title claims abstract description 42
- 239000010802 sludge Substances 0.000 title claims abstract description 35
- 238000005554 pickling Methods 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000000428 dust Substances 0.000 claims abstract description 19
- 239000002904 solvent Substances 0.000 claims abstract description 12
- 239000010865 sewage Substances 0.000 claims description 59
- 239000007788 liquid Substances 0.000 claims description 35
- 239000003518 caustics Substances 0.000 claims description 28
- 230000001877 deodorizing effect Effects 0.000 claims description 16
- 238000012545 processing Methods 0.000 claims description 16
- 239000007921 spray Substances 0.000 claims description 16
- 239000002699 waste material Substances 0.000 claims description 13
- 239000002002 slurry Substances 0.000 claims description 10
- 230000001502 supplementing effect Effects 0.000 claims description 10
- 238000005406 washing Methods 0.000 claims description 10
- 239000000243 solution Substances 0.000 claims description 9
- 235000015097 nutrients Nutrition 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000012670 alkaline solution Substances 0.000 claims description 3
- 239000003153 chemical reaction reagent Substances 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 46
- 238000010521 absorption reaction Methods 0.000 abstract description 36
- 230000000694 effects Effects 0.000 abstract description 6
- 239000002351 wastewater Substances 0.000 abstract description 3
- 238000004065 wastewater treatment Methods 0.000 abstract description 2
- 238000010170 biological method Methods 0.000 abstract 1
- 239000012295 chemical reaction liquid Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 30
- 230000008569 process Effects 0.000 description 22
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 18
- 238000006243 chemical reaction Methods 0.000 description 12
- 239000003205 fragrance Substances 0.000 description 8
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 5
- 238000011953 bioanalysis Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 239000000654 additive Substances 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 4
- 239000003513 alkali Substances 0.000 description 4
- 239000002585 base Substances 0.000 description 4
- 239000000376 reactant Substances 0.000 description 4
- GETQZCLCWQTVFV-UHFFFAOYSA-N trimethylamine Chemical compound CN(C)C GETQZCLCWQTVFV-UHFFFAOYSA-N 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 238000004332 deodorization Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 235000012054 meals Nutrition 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 230000000813 microbial effect Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000005201 scrubbing Methods 0.000 description 2
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 2
- 238000005987 sulfurization reaction Methods 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 102000002322 Egg Proteins Human genes 0.000 description 1
- 108010000912 Egg Proteins Proteins 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 235000011148 calcium chloride Nutrition 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- ZPWVASYFFYYZEW-UHFFFAOYSA-L dipotassium hydrogen phosphate Chemical compound [K+].[K+].OP([O-])([O-])=O ZPWVASYFFYYZEW-UHFFFAOYSA-L 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- DNJIEGIFACGWOD-UHFFFAOYSA-N ethanethiol Chemical compound CCS DNJIEGIFACGWOD-UHFFFAOYSA-N 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 239000011790 ferrous sulphate Substances 0.000 description 1
- 235000003891 ferrous sulphate Nutrition 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000037353 metabolic pathway Effects 0.000 description 1
- 230000007269 microbial metabolism Effects 0.000 description 1
- 210000004681 ovum Anatomy 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 244000052769 pathogen Species 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000028327 secretion Effects 0.000 description 1
- 239000010801 sewage sludge Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Treating Waste Gases (AREA)
Abstract
The utility model relates to a sludge drying tail gas treatment device suitable for a sludge treatment plant. The sludge drying tail gas treatment device comprises a drying device, a cyclone dust collector, an acid-pickling tower, an alkali-pickling tower, a biofilter and a draft fan, wherein the cyclone dust collector is connected with an air outlet of the drying device; an air outlet of the cyclone dust collector is connected with the acid-pickling tower, the alkali-pickling tower, the biofilter and the draft fan in sequence. According to the sludge drying tail gas treatment device, sludge drying tail gas is treated with an acid-base method and a biological method, water in a wastewater plant is used for replacing a system external water source to serve as an absorption solvent, and part of the water returns to an absorption tower through a wastewater treatment system and part of the water enters an anaerobic pond to rise the temperature of a reaction liquid in the anaerobic pond after odor is absorbed, so that the odor removal effect is good, water resources are saved, the comprehensive utilization rate of resources is increased, the operating expense is lowered, and the load of a self-contained boiler of the wastewater plant is reduced. The sludge drying tail gas treatment device can be popularized and used on a large scale.
Description
Technical field
The utility model has been announced a kind of drying sludge exhaust gas treating method that is applicable to Treatment of Sludge factory, for the processing of tail gas after drying sludge.
Background technology
Common sewage treatment process is mainly divided three classes, comprise chemical method (conversion process that adds chemical substance and pollutant generation chemical reaction in waste water), Physical (filter, precipitation, separated, floating and centrifugal etc.) and bioanalysis (utilizing microorganism to carry out redox reaction removal pollutant), wherein the cost of investment of Physical and chemical method and operating cost are all higher, and treatment effect is not so good, easily cause secondary pollution, town sewage is processed main technique ordinary circumstance and is adopted bioanalysis.Common urban wastewater treatment firm technique has: A
2/ O sewage treatment process, oxidation ditch process, BAF (BAF), moving-bed biofilm sewage treatment process and combined biological membrane process etc., wherein A
2/ O technique is the simplest, the most widely used a kind of denitrogenation dephosphorizing sewage treatment process of flow process.But wherein the reaction tank of anaerobic reaction will could normally move at a certain temperature, to reaction tank, heat, to guarantee that reaction tank has a temperature environment that is relatively applicable to microbial metabolism breeding, could improve sewage treating efficiency, this just need to increase the heating facilities such as boiler.
Dewatered sludge is the accessory substance that municipal sewage treatment produces, and contains a large amount of pathogens and worm's ovum and undecomposed protein, in storage process, can produce corruption, forms stench.Modal sludge pre-treatment method has drying and dehydrating and microorganism fermentation to dewater two kinds, and exhaust gas treating method has liquid scrubbing absorption process and absorption method etc., and it is a ripe technology that wherein liquid scrubbing absorption process is processed tail gas, effective, and small investment is simple to operate.
In patent [201010571645.2], the odor treatment method that a kind of sewage sludge mummification produces is disclosed, this patent adopts washing+acid-base method to process foul smell.Adopt this method water consumption large, the waste liquid producing after absorbing need be processed again, has secondary pollution problem, and this just requires to increase sewage-treatment plant, has increased the investment cost of equipment; Overall energy consumption is high, operation and maintenance cost is also high, is particularly useful for high concentration foul smell; And odor concentration constantly changes, the technological parameter of operation lacks the means of controlling of adjusting, and treatment effect is difficult to guarantee stable.Therefore, should provide a kind of new technical scheme to address the above problem.
Utility model content
The purpose of this utility model is for the self-built sludge dry system of Sewage Plant, provides a kind of energy-saving and water-saving, the drying sludge exhaust gas treating method that applied widely, operating cost is low, for the treatment of the foul smell producing in sludge-drying process.
For achieving the above object, the utility model adopts following technical scheme:
A kind of drying sludge exhaust gas processing device that is applicable to Treatment of Sludge factory, comprise drying device, cyclone dust collectors, pickling tower, caustic wash tower, biofilter and air-introduced machine, the air outlet of described drying device is connected with the air intake vent of cyclone dust collectors, and the air outlet of cyclone dust collectors is communicated with the entrance of pickling tower, the outlet of pickling tower, the entrance of caustic wash tower, the outlet of caustic wash tower, the entrance of biofilter is communicated with successively, and the outlet of biofilter is connected with air-introduced machine, described pickling tower, caustic wash tower, the bottom of biofilter is respectively separately with its top and for to pickling tower, caustic wash tower, the sewage disposal system that the waste liquid that biofilter produces carries out after-treatment is directly communicated with.
Described drying device is revolving drum drier or band drier or paddle-dryer or tray drier or fluid bed dryer.
Described pickling tower and caustic wash tower are spray column, and the slurry pool of spray column bottom is communicated with the middle water of Sewage Plant, a spray column slurry pool bottom waste liquid part is out returned to spray column top, a part enters the anaerobic pond of the sewage disposal system of Sewage Plant, and the middle water after sewage disposal system is processed is re-used as supplementing solvent and enters after slurry pool mixes with alkaline solution or acid solution and send into spray column top again.
Described biofilter is the deodorizing tower that biologic packing material is housed; And the biological washing in a deodorizing tower bottom liquid bath waste liquid part is out returned to deodorizing tower, a part enters the anaerobic pond of the sewage disposal system of Sewage Plant, middle water after sewage disposal system is processed is re-used as the biology washing liquid bath that supplementing solvent enters deodorizing tower bottom, in biology washing liquid bath with after adjusting the reagent mix of nutrient environment, sends into deodorizing tower top again.
Be applicable to a technique for the drying sludge exhaust gas treating method of Treatment of Sludge factory, can be used for processing the tail gas producing in sludge-drying process; Its technological process is:
(1) gas flow process: dried tail gas is recycled blower fan by pickling tower, caustic wash tower and biofilter successively and takes out and draw directly emptyingly after cyclone dust removal, and gas enters the absorbent of Yu Ta top, absorption tower drenching from tower bottom and discharges from tower top after reverse contact in tower;
(2) mud flow process: discharged by drying device discharging opening after wet mud drying device is dry, be delivered to siccative storehouse together with the dry powder of collecting with cyclone separator;
(3) water system flow process: the middle water after Sewage Plant is processed enters respectively pickling tower, caustic wash tower, biofilter through circulating pump, absorbing after conversion odorant absorption liquid goes out a part from tower bottom and returns in absorption tower, a part enters the anaerobic pond of the sewage disposal system of Sewage Plant, and the middle water after sewage disposal system is processed is re-used as supplementing solvent and enters after slurry pool mixes with alkaline solution or acid solution and send into spray column top again.
In described step (1), described dried exhaust temperature is 120～150 ℃.
In described step (2), described dried mud temperature is 8～110 ℃.
In described step (3), the absorption liquid of described pickling tower is that mass concentration is the mixed liquor that (1～10%) NaOH solution and mass concentration are (0.005～0.2%) additive solution, the pH value of mixed liquor remains on more than 10, the sour gas such as the main removal of hydrogen sulfide of NaOH, additive clorox is generally used together with alkaline absorption solution, be mainly used in eliminating for other method and be difficult to the sulfuration methyl of eliminating, while processing high concentration foul smell, liquor natrii hypochloritis's concentration (effective chlorine density) is about 0.05～0.2%; While processing low concentration foul smell, use liquor natrii hypochloritis's concentration approximately 0.005～0.05%.
In described step (3), described caustic wash tower absorption liquid is that mass concentration is 0.5～5% H
2sO
4, be mainly used in eliminating by stink due to the alkaline gas such as ammonia, trimethylamine.
In described step (3), described biofilter is mainly used in eliminating the foul gas of low concentration after pickling, alkali cleaning.
In described step (3), after described absorption conversion odorant, absorption liquid returns in absorption tower from tower bottom extraction (50～70) %, residue (30～50) % enters the anaerobic pond of the sewage disposal system of Sewage Plant, and the temperature of anaerobic pond reactant liquor is improved to (1～10) ℃.
The utility model adopts acid-base method to add bioanalysis lignin-sludge dried tail gas, utilize water in Sewage Plant to replace the external water source of system as the solvent of pickling tower, caustic wash tower and biofilter, tower bottom waste liquid out returns to absorption tower after sewage disposal system is processed again, after utilization absorption conversion odorant, the heat of absorption liquid improves the temperature of anaerobic pond reactant liquor, not only saved water resource, improved comprehensive utilization of resources rate, reduced operating cost, also reduced Sewage Plant and provided the load of boiler for oneself, can large-scale promotion use.
Biological deodorization is to utilize organism adsorption-decomposition function odor causing substance fixing in solid support matter, only needs to consume the medicament expense use that makes power cost that odorant contacts with microbial and a small amount of adjustment nutrient environment during operation.Bioanalysis and other materilization freatment method comparison, advantage is mainly reflected in: process equipment is simple, administer and maintain conveniently, overall energy consumption is low, operation and maintenance cost is few, less secondary pollution and the problem shifting across medium pollution of occurring, is especially applicable to low concentration foul smell.These advantages make its research and development very fast, become the important development direction of odor treatment.
The beneficial effects of the utility model are:
(1) save water and energy.Adopt water in Sewage Plant to replace the external water source of system as lyosoption, and tower bottom waste liquid out returns to absorption tower after sewage disposal system is processed again, greatly reduced the consumption of water, reduced operating cost; Utilize to absorb the heat of absorption liquid after conversion odorant the temperature of anaerobic pond reactant liquor is improved, reduced the load that Sewage Plant is provided boiler for oneself, improved comprehensive utilization of resources rate, whole system energy-saving effect is obvious.
(2) good deodorization effect, applied widely.Adopt the foul smell of acid wash and alkali wash pre-treating high concentration, the foul gas of low concentration after biofilter processing pickling, alkali cleaning, overcome acid-base method processing low concentration foul smell and bioanalysis and processed the shortcoming of high concentration foul smell poor effect, deodorizing effect obviously improves, and the scope of application increases greatly.
(3) operating cost is low.The absorption liquid of bottom, absorption tower partly recycles, and in Sewage Plant, water absorbs after foul smell is processed by sewage disposal system and returns to absorption tower again, has effectively reduced the operating cost of acid-base method.
Accompanying drawing explanation
Fig. 1 is the process chart of the utility model specific embodiment.
Wherein, 1. drying device, 2. cyclone dust collectors, 3. pickling tower, 4. caustic wash tower, 5. air-introduced machine, 6. biofilter.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail.
In Fig. 1, be applicable to the drying sludge exhaust gas processing device of Treatment of Sludge factory, comprise drying device 1, cyclone dust collectors 2, pickling tower 3, caustic wash tower 4, biofilter 6 and air-introduced machine 5, the air outlet of drying device 1 is connected with the air intake vent of cyclone dust collectors 2, and the entrance of the air outlet pickling tower of cyclone dust collectors 2 is communicated with, the entrance of the outlet of the entrance of the outlet of pickling tower 3, caustic wash tower 4, caustic wash tower 4, biofilter 6 is communicated with successively, and the outlet of biofilter 6 is connected with air-introduced machine.Drying sludge exhaust gas treating method, drying device 1 offgas duct is connected with cyclone dust collectors 2, and the tail gas after dedusting is taken out ejectment sky through overpickling tower 3, caustic wash tower 4, biofilter 6 by air-introduced machine 5 successively; Together with the meal that dried mud drying device 1 discharging opening is collected with cyclone dust collectors 2, transport siccative storehouse back; A waste liquid part for pickling tower 3, caustic wash tower 4, biofilter 6 is in circulating pump returns to absorption tower, and a part enters the anaerobic pond of the sewage disposal system of Sewage Plant, and the middle water after sewage disposal system is processed is re-used as supplementing solvent and enters spray column.
Drying device is revolving drum drier or band drier or paddle-dryer or tray drier or fluid bed dryer;
Pickling tower 3 and caustic wash tower 4 are spray column, and the slurry pool of spray column bottom is communicated with water in Sewage Plant, and the water in Sewage Plant of usining, as lyosoption, utilizes NaOH and Na (ClO)
2absorb the sour gas in tail gas, utilize H
2sO
4absorb the alkaline gas in tail gas, a spray column slurry pool bottom waste liquid part is out returned to absorption tower, a part enters the anaerobic pond of the sewage disposal system of Sewage Plant, and the middle water after sewage disposal system is processed is re-used as supplementing solvent and enters slurry pool and NaOH/Na (ClO)
2or H
2sO
4after mixing, send into again spray column top.
Biofilter 6 is for being equipped with the deodorizing tower of biologic packing material, wherein the odorant in mud is adsorbed and is absorbed by the outer polymer of the born of the same parents of microorganism secretion and enters in microbial cell, under the catalytic action of various biology enzymes, metabolic pathway is broken down into simple inorganic matter; And the biological washing in a deodorizing tower bottom liquid bath waste liquid part is out returned to deodorizing tower, a part enters the anaerobic pond of the sewage disposal system of Sewage Plant, middle water after sewage disposal system is processed is re-used as the biology washing liquid bath that supplementing solvent enters deodorizing tower bottom, after mixing with the reagent (urea, dipotassium hydrogen phosphate are as Major Nutrient material, and magnesium sulfate, calcium chloride, ferrous sulfate are as trace element) of adjusting nutrient environment, send into again deodorizing tower top in biology washing liquid bath.
Be applicable to a technique for the drying sludge exhaust gas treating method of Treatment of Sludge factory, can be used for processing the tail gas producing in sludge-drying process; Its technological process is:
(1) gas flow process: dried tail gas is recycled blower fan by pickling tower, caustic wash tower and biofilter successively and takes out and draw directly emptyingly after cyclone dust removal, and gas enters the absorbent of Yu Ta top, absorption tower drenching from tower bottom and discharges from tower top after reverse contact in tower;
(2) mud flow process: discharged by drying device discharging opening after wet mud drying device is dry, be delivered to siccative storehouse together with the dry powder of collecting with cyclone separator;
(3) water system flow process: the middle water after Sewage Plant is processed enters respectively pickling tower, caustic wash tower, biofilter through circulating pump, absorbing after conversion odorant absorption liquid goes out a part from tower bottom and returns in absorption tower, a part enters the anaerobic pond of the sewage disposal system of Sewage Plant, and the middle water after sewage disposal system is processed is re-used as supplementing solvent and enters absorption tower.
In step (1), described dried exhaust temperature is 120～150 ℃.
In step (2), described dried mud temperature is 8～110 ℃.
In step (3), the absorption liquid of described pickling tower is that mass concentration is the mixed liquor that (1～10%) NaOH solution and mass concentration are (0.005～0.2%) additive solution, the pH value of mixed liquor remains on more than 10, the sour gas such as the main removal of hydrogen sulfide of NaOH, additive clorox is generally used together with alkaline absorption solution, be mainly used in eliminating for other method and be difficult to the sulfuration methyl of eliminating, while processing high concentration foul smell, liquor natrii hypochloritis's concentration (effective chlorine density) is about 0.05～0.2%; While processing low concentration foul smell, use liquor natrii hypochloritis's concentration approximately 0.005～0.05%.
In step (3), described caustic wash tower absorption liquid is that mass concentration is 0.5～5% H
2sO
4, be mainly used in eliminating by stink due to the alkaline gas such as ammonia, trimethylamine.
In step (3), described biofilter is mainly used in eliminating the foul gas of low concentration after pickling, alkali cleaning.
In step (3), after described absorption conversion odorant, absorption liquid returns in absorption tower from tower bottom extraction (50～70) %, residue (30～50) % enters the anaerobic pond of the sewage disposal system of Sewage Plant, and the temperature of anaerobic pond reactant liquor is improved to (1～10) ℃.
Concrete implementation step of the present utility model is as follows:
(1) moisture 70%～90% mud is transported siccative storehouse back together with the dry rear meal of collecting with cyclone dust collectors 2 of drying device 1;
(2) dried tail gas is taken out ejectment sky through overpickling tower 3, caustic wash tower 4, biofilter 6 by air-introduced machine 5 successively after cyclone dust collectors 2 dedustings;
(3) waste liquid (50～70) % of pickling tower 3, caustic wash tower 4, biofilter 6 is in circulating pump returns to absorption tower, residue (30～50) % enters the anaerobic pond of the sewage disposal system of Sewage Plant, and the middle water after sewage disposal system is processed is re-used as supplementing solvent and enters absorption tower.
Claims (4)
1. a drying sludge exhaust gas processing device that is applicable to Treatment of Sludge factory, it is characterized in that: comprise drying device, cyclone dust collectors, pickling tower, caustic wash tower, biofilter and air-introduced machine, the air outlet of described drying device is connected with the air intake vent of cyclone dust collectors, and the air outlet of cyclone dust collectors is communicated with the entrance of pickling tower, the outlet of pickling tower, the entrance of caustic wash tower, the outlet of caustic wash tower, the entrance of biofilter is communicated with successively, and the outlet of biofilter is connected with air-introduced machine, described pickling tower, caustic wash tower, the bottom of biofilter is respectively separately with its top and for to pickling tower, caustic wash tower, the sewage disposal system that the waste liquid that biofilter produces carries out after-treatment is directly communicated with.
2. the drying sludge exhaust gas processing device that is applicable to Treatment of Sludge factory as claimed in claim 1, is characterized in that: described drying device is revolving drum drier or band drier or paddle-dryer or tray drier or fluid bed dryer.
3. the drying sludge exhaust gas processing device that is applicable to Treatment of Sludge factory as claimed in claim 1, it is characterized in that: described pickling tower and caustic wash tower are spray column, and the slurry pool of spray column bottom is communicated with the middle water of Sewage Plant, a spray column slurry pool bottom waste liquid part is out returned to spray column top, a part enters the anaerobic pond of the sewage disposal system of Sewage Plant, and the middle water after sewage disposal system is processed is re-used as supplementing solvent and enters after slurry pool mixes with alkaline solution or acid solution and send into spray column top again.
4. the drying sludge exhaust gas processing device that is applicable to Treatment of Sludge factory as claimed in claim 1, is characterized in that: described biofilter is the deodorizing tower that biologic packing material is housed; And the biological washing in a deodorizing tower bottom liquid bath waste liquid part is out returned to deodorizing tower, a part enters the anaerobic pond of the sewage disposal system of Sewage Plant, middle water after sewage disposal system is processed is re-used as the biology washing liquid bath that supplementing solvent enters deodorizing tower bottom, in biology washing liquid bath with after adjusting the reagent mix of nutrient environment, sends into deodorizing tower top again.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420233484.XU CN203829898U (en) | 2014-05-08 | 2014-05-08 | Sludge drying tail gas treatment device suitable for sludge treatment plant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420233484.XU CN203829898U (en) | 2014-05-08 | 2014-05-08 | Sludge drying tail gas treatment device suitable for sludge treatment plant |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103933840A (en) * | 2014-05-08 | 2014-07-23 | 山东天力干燥股份有限公司 | Sludge drying tail gas processing device and method for sludge processing plant |
| CN104501173A (en) * | 2014-12-30 | 2015-04-08 | 杭州韦尔茂通环境技术有限公司 | Device and process for pyrolysis treatment on chemical-industry type solid waste and waste liquid |
| CN109173701A (en) * | 2018-10-29 | 2019-01-11 | 广东盈睿通环境科技有限公司 | Organic waste gas biological purification system and process |
-
2014
- 2014-05-08 CN CN201420233484.XU patent/CN203829898U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103933840A (en) * | 2014-05-08 | 2014-07-23 | 山东天力干燥股份有限公司 | Sludge drying tail gas processing device and method for sludge processing plant |
| CN103933840B (en) * | 2014-05-08 | 2016-03-30 | 山东天力干燥股份有限公司 | A kind of drying sludge exhaust gas processing device and method being applicable to Treatment of Sludge factory |
| CN104501173A (en) * | 2014-12-30 | 2015-04-08 | 杭州韦尔茂通环境技术有限公司 | Device and process for pyrolysis treatment on chemical-industry type solid waste and waste liquid |
| CN109173701A (en) * | 2018-10-29 | 2019-01-11 | 广东盈睿通环境科技有限公司 | Organic waste gas biological purification system and process |
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