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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- 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
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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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|---|---|---|---|
| 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 | A kind of organic exhaust gas biological purification system and technique |
-
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 | A kind of organic exhaust gas biological purification system and technique |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140917 Termination date: 20180508 |