CN100462316C - Sludge storing and preheating system utilizing sludge drying tail gas afterheat - Google Patents
Sludge storing and preheating system utilizing sludge drying tail gas afterheat Download PDFInfo
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- CN100462316C CN100462316C CNB2007100691781A CN200710069178A CN100462316C CN 100462316 C CN100462316 C CN 100462316C CN B2007100691781 A CNB2007100691781 A CN B2007100691781A CN 200710069178 A CN200710069178 A CN 200710069178A CN 100462316 C CN100462316 C CN 100462316C
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- sludge
- sludge drying
- flue
- storage vault
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- 239000010802 sludge Substances 0.000 title claims abstract description 87
- 238000001035 drying Methods 0.000 title claims abstract description 63
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000010438 heat treatment Methods 0.000 claims description 18
- 239000010801 sewage sludge Substances 0.000 claims description 13
- 210000003127 knee Anatomy 0.000 claims description 10
- 230000037452 priming Effects 0.000 claims description 6
- 239000000779 smoke Substances 0.000 claims description 6
- 239000007789 gas Substances 0.000 description 26
- 238000000034 method Methods 0.000 description 11
- 239000010865 sewage Substances 0.000 description 10
- 239000000428 dust Substances 0.000 description 8
- 230000008569 process Effects 0.000 description 5
- 239000008187 granular material Substances 0.000 description 4
- 239000004071 soot Substances 0.000 description 4
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- 238000011010 flushing procedure Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
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- 238000005406 washing Methods 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
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- 238000005265 energy consumption Methods 0.000 description 2
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- 230000003628 erosive effect Effects 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
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- FRXSZNDVFUDTIR-UHFFFAOYSA-N 6-methoxy-1,2,3,4-tetrahydroquinoline Chemical compound N1CCCC2=CC(OC)=CC=C21 FRXSZNDVFUDTIR-UHFFFAOYSA-N 0.000 description 1
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- 231100001261 hazardous Toxicity 0.000 description 1
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- 230000001473 noxious effect Effects 0.000 description 1
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- 238000004065 wastewater treatment Methods 0.000 description 1
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- Treatment Of Sludge (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The present invention discloses sludge storing and preheating system utilizing the afterheat of sludge drying tail gas. The system consists of one upper part and one lower part, the upper part has a closed sludge storing household, a sludge shifter, a sludge shifter track, a sludge inlet, a sludge outlet and a gas exhaust unit; and the lower part has walls for supporting the bottom of the closed sludge storing household, a flue, a high pressure water pipe, and a water collecting and guiding set. The system with circulating utilization of energy can lower power consumption for drying sludge, reduce cost and lower the pollution load of sludge drying tail gas.
Description
Technical field
The present invention relates to a kind of mud of sludge drying tail gas afterheat that utilizes stores and pre-heating system.
Background technology
City domestic sewage and trade effluent can produce the mud that is equivalent to sewage volume 0.3%～0.5% or sewage quality 1%～2% when being purified processing.According to pertinent data, will reach 440 * 10 respectively to the quantity discharged of 2010 and the year two thousand twenty China municipal effluent
8m
3/ day and 536 * 10
8m
3/ day, this meaning is along with the fast development of national economy and increasing rapidly of urban population, the quantity of municipal effluent is constantly increasing, meanwhile people are also more and more higher to the requirement of environmental quality, trade effluent and domestic sewage treating rate also will improve constantly, and the amount of sludge that sewage work produces will grow with each passing day.
Sludge of sewage treatment plant is a kind of extremely complicated heterogeneous body of being made up of organic relic, bacterium thalline, inorganic particle and colloid etc., because most pollutents are transferred in the mud in the sewage, it is high and quantity is big that this has a water ratio with regard to the mud that has determined sewage work to produce, and the characteristics of enrichment high density pollution thing and heavy metal, if this municipal sludge can not get appropriate processing, will bring secondary pollution, cause serious threat to ecotope, therefore, the safe disposal of municipal sludge is the difficult problem that the whole world faces jointly.In the world the processing of municipal sludge is concluded and mainly contain following four kinds of methods, i.e. sanitary landfill, soil utilization, burning and throwing sea.Sanitary landfill is to follow be born the earliest traditional sludge method of disposal of sewage work, its greatest drawback, and the one, the various hazardous and noxious substances of filling out in the hole are polluted surrounding enviroment through rain erosion, and the 2nd, the place of suitable landfill mud is arranged along with the urbanization process difficulty; The soil utilization be with mud as agricultural or garden fertilizer, but Persistent organic pollutants and heavy metal can bring potential harm to ecotope in the municipal sludge; Can make mud obtain tangible minimizing effect though burn, particularly there is bigger difficulty in the big running cost height of facility investment in the Air Pollution Control method; Mud is thrown extra large can bringing to the marine eco-environment and is seriously influenced, and is forbidded strictly.Owing to do not have effective method for sludge treatment to use for reference so far, China mainly adopts the disposal options of interim landfill to municipal sludge at present, a large amount of soils had both been taken, again ecotope is damaged, particularly the effluent seepage in the mud is difficult to estimate for the serious harm that groundwater resource brought.
For many years, expert and technician are by the practice to various method for sludge treatment both at home and abroad, the common recognition that draws is to open up one that municipal sludge is carried out the effective way of innoxious, minimizing and recycling treatment is imperative, and sludge drying at first makes mud reach minimizing, is a necessary process and a crucial ring of finally realizing sewage sludge harmlessness and recycling treatment.From the mud that sewage work produces, by mechanical dehydration, water ratio is generally between 75%～85%, pass through drying process, if the water ratio of mud is dropped to below 40%, volume can reduce more than 2/3rds, but will finish this step need consume a large amount of energy.In order to reduce the energy consumption of sludge drying, we are on the basis of having invented return-flow type temperature controllable sludge drying apparatus and method (ZL200410052759.0), utilize the mud of sludge drying tail gas afterheat to store and pre-heating system by foundation, the waste heat (sludge drying discharge tail gas temperature is 100～250 ℃) of discharging tail gas when making full use of sludge drying, make mud in the process that stores, improve the temperature of mud simultaneously, thereby created condition for improving sludge drying efficient, finally reached the recycle of internal system energy and the purpose of reduction sludge drying running cost.
Summary of the invention
The purpose of this invention is to provide a kind of mud of sludge drying tail gas afterheat that utilizes stores and pre-heating system.
Utilize the mud storage of sludge drying tail gas afterheat to have closed mud storage vault with pre-heating system, closed mud storage vault one end is provided with the first mud input aperture and the second mud input aperture, closed mud storage vault is provided with and pushes away the capable rail of mud machine, pushing away the capable rail of mud machine is provided with first and pushes away mud machine and second and push away the mud machine, the closed mud storage vault the other end is provided with the first mud delivery port and the second mud delivery port, the first mud delivery port is connected with the sewage sludge feed device with the second mud delivery port, the sewage sludge feed device is connected by the sludge inlet of transport tape with the first sludge drying device, the first sludge drying device is connected with heating stove with the 4th air door by the 3rd air door respectively with the second sludge drying device, the first sludge drying device and the second sludge drying device are connected with the flue of closed mud storage vault bottom respectively by after the 3rd vent-pipe and first air door and the second air door parallel connection, flue passes mud storage vault bottom, with second vent-pipe, the water film dedusting air-removal equipment, second induced draft fan, chimney is connected successively, high pressure water pipe and flue, priming device catchments, settling tank, water pump is connected, and closed mud storage vault is by first induced draft fan, first vent-pipe is connected with heating stove.
Described closed mud storage vault bottom is provided with knee wall, and knee wall body of wall body of wall height is 0.8～2.0m, and standoff distance is 0.5～1.5m between body of wall and the body of wall.Constitute flue between the two knee wall bodies of wall, the flue width is 0.5～1.5m, and flue height is 0.8～2.0m.The ground of flue is 2～5 inclinations of spending from advancing mouth to smoke outlet.
The present invention utilizes the waste heat of sludge drying discharging tail gas, storage mud is carried out preheating have the outstanding advantage in following two aspects: the one, by the recycle of internal system energy, in having reduced mud drying process in the energy expenditure, improved the initial temperature of sludge drying, created condition for improving sludge drying efficient, particularly in the winter time when the mud temperature is lower, preheating through mud has improved the mud temperature, can make the energy consumption of sludge drying be reduced to bottom line, sludge drying and granulating process are moved under lower Financial cost, made sewage sludge harmlessness thereby overcome because of the economic cost height, minimizing and recycling treatment are difficult to be put to actual bottleneck problem; The 2nd, the sludge drying discharge tail gas has reduced the load that particulate matter is polluted in the tail gas, thereby can improve the effect of water film dedusting degasification greatly by closed mud storage vault underflue, guarantees the sludge drying tail gas qualified discharge.
The present invention has dropped into practice in the Yiwu, Zhejiang, practice shows, adopt this technology that the running cost of municipal sludge mummification is further reduced, and make the complete qualified discharge of sludge drying discharge tail gas, obtained significant social, environment and economic triple benefit.
Description of drawings
Accompanying drawing is to utilize the mud of sludge drying tail gas afterheat to store and the pre-heating system structural representation, among the figure: closed mud storage vault 1, first pushes away mud machine 2, second pushes away mud machine 3, push away the capable rail 4 of mud machine, knee wall 5, stainless steel sludge storage vault ground 6, first air door 7, second air door 8, the first mud input aperture 9, the second mud input aperture 10, the first mud delivery port 11, the second mud delivery port 12, sewage sludge feed device 13, first vent-pipe 14, first induced draft fan 15, second vent-pipe 16, water film dedusting air-removal equipment 17, second induced draft fan 18, chimney 19, water pump 20, high pressure water pipe 21, priming device 22 catchments, settling tank 23, mud transport tape 24, sludge inlet 25, heating stove 26, heating duct 27, the 3rd air door 28, the 4th air door 29, the first sludge drying device 30, the second sludge drying device 31, the 3rd vent-pipe 32, flue 33.
Embodiment
As shown in drawings, utilize the mud storage of sludge drying tail gas afterheat to have closed mud storage vault 1 with pre-heating system, closed mud storage vault 1 one ends are provided with the first mud input aperture 9 and the second mud input aperture 10, closed mud storage vault 1 is provided with and pushes away the capable rail 4 of mud machine, pushing away the capable rail 4 of mud machine is provided with first and pushes away mud machine 2 and second and push away mud machine 3, closed mud storage vault 1 the other end is provided with the first mud delivery port 11 and the second mud delivery port 12, the first mud delivery port 11 is connected with sewage sludge feed device 13 with the second mud delivery port 12, sewage sludge feed device 13 is connected with the sludge inlet 25 of the first sludge drying device 30 by transport tape, the first sludge drying device 30 is connected with heating stove 26 with the 4th air door 29 by the 3rd air door 28 respectively with the second sludge drying device 31, the first sludge drying device 30 and the second sludge drying device 31 are connected with the flue 33 of closed mud storage vault 1 bottom respectively by after the 3rd vent-pipe 32 and first air door 7 and 8 parallel connections of second air door, flue 33 passes mud storage vault bottom, with second vent-pipe 16, water film dedusting air-removal equipment 17, second induced draft fan 18, chimney 19 is connected successively, high pressure water pipe 21 and flue 33, priming device 22 catchments, settling tank 23, water pump 20 is connected, and closed mud storage vault 1 is by first induced draft fan 15, first vent-pipe 14 is connected with heating stove 26.
Described closed mud storage vault 1 bottom is provided with knee wall 5, and knee wall body of wall body of wall height is 0.8～2.0m, and standoff distance is 0.5～1.5m between body of wall and the body of wall.Constitute flue 33 between two knee walls, 5 bodies of wall, the flue width is 0.5～1.5m, and flue height is 0.8～2.0m.The ground of flue 33 is 2～5 inclinations of spending from advancing mouth to smoke outlet.
The present invention is made up of upper and lower two portions.Top has closed mud storage vault, push away the mud machine, push away the capable rail of mud machine, the mud input aperture, the mud delivery port, gas barrier, the volume of closed mud storage vault is according to the size decision of mud storage capacity, utilization pushes away the operating unit that the capable rail of mud machine is divided into closed mud storage vault two same functions naturally, the stainless material that heat transfer property is good and erosion resistance is strong is as mud storage vault bottom, two push away the mud machine under the manipulation of telepilot, rely on the row rail to walk back and forth, and implement to turn over mixed function on one side and make the mud thermally equivalent, according to the sludge drying schedule requirement mud is pushed into the mud delivery port on one side, two mud input apertures are equipped with open and close type door up and down respectively, two mud delivery ports connect the sewage sludge feed device, the sewage sludge feed device is connected by the opening for feed of conveying belt with the sludge drying device, gas barrier will store the various obnoxious flavoures of mud release and send into fluidizing furnace by exhaust duct, and high temperature is eliminated; The lower section has the body of wall that supports closed mud storage vault bottom, flue, high pressure water pipe, support the high 0.8～2.0m of body of wall of closed mud storage vault bottom, 0.5～the 1.5m of being separated by between body of wall and the body of wall, the function of body of wall is except supporting closed mud storage vault bottom, several flues have also been made up, and determined the wide 0.5～1.5m of each flue, high 0.8～2.0m, the ground of flue is 2～5 inclinations of spending from advancing mouth to smoke outlet, the mouth that advances of flue is connected with sludge drying system, discharge tail gas is controlled the flue that enters corresponding to the top operating unit in the mud drying process by air door, high pressure water pipe is installed in the flue smoke inlet end, utilize the settling tank interior recirculated water shared with the water film dedusting air-removal equipment, periodic flushing is deposited on the soot dust granule thing in the flue, be provided with at flue smoke outlet end and catchment and the diversion facility, soot dust granule thing washing fluid can be collected, and guide in the settling tank that has with water film dedusting degasification facility, in order under lower temperature, to wash the flue laying dust, in 5～48 hours before flushing flue laying dust, stop sludge drying tail gas and enter corresponding flue.
Special-purpose mud waggon or mud transferpump are sent into closed mud storage vault 1 with the sludge from wastewater treatment plant of water ratio about 80% by the first mud input aperture 9 or the second mud input aperture 10, first pushes away mud machine 2 or second pushes away mud machine 3 when mud is shakeout, turn over mixed mud and make mud thermally equivalent as far as possible, and advance to mud delivery port direction gradually, pass through the 3rd vent-pipe 32 from the first sludge drying device 30 and the second sludge drying device, 31 discharge tail gas, under the control of first air door 7 and second air door 8, enter the flue 33 of closed mud storage vault 1 bottom, pass mud storage vault bottom, through second vent-pipe 16, enter water film dedusting air-removal equipment 17 and carry out the dedusting degasification, and send into chimney 19 by second induced draft fan 18, qualified discharge, temperature is that 100～250 ℃ sludge drying tail gas is passed to mud by mud storage vault bottom with waste heat, make mud obtain preheating, sludge drying tail gas is by flue 33 time, owing to slowing down and part of waste heat is utilized and lowers the temperature, most of soot dust granule thing in the tail gas can be deposited in the flue 33, need regularly to wash the soot dust granule thing that is deposited in the flue 33 with the high pressure water pipe 21 that is installed in inlet mouth one end, the ground design of flue 33 is tilted to air outlet one end, therefore the washing fluid spontaneous current is to the priming device 22 that catchments, the water of high pressure water pipe 21 is by water pump 20, recirculated water from settling tank 23, the priming device 22 that catchments is sent washing fluid back to settling tank 23 again, in order under lower temperature, to wash the flue laying dust, in 5～48 hours before flushing flue laying dust, stop sludge drying tail gas and enter corresponding flue, mud in the closed mud storage vault 1 can discharge foul gas in the process of being carried out preheating by sludge drying tail gas afterheat, first induced draft fan 15 is sent the foul gas of these releases into heating stove 26 high temperature by first vent-pipe 14 and is eliminated, pushing away mud machine 2 and second by first pushes away mud machine 3 mud after the preheating is pushed the first mud delivery port 11 and the second mud delivery port 12 respectively, mud after the preheating enters sewage sludge feed device 13 from the first mud delivery port 11 and the second mud delivery port 12, sewage sludge feed device 13 is with the requirement of the mud after the preheating by the mummification progress, with equal even equally spaced states, send into the sludge inlet 25 of the first sludge drying device 30 by transport tape, pass through the 3rd air door 28 and the 4th air door 29 respectively from heating stove 26 from the first sludge drying device 30 and the needed thermal source of the second sludge drying device, 31 dewatered sludges, the heat energy of heating stove 26 can come spontaneous combustion coal, fuel oil and combustion Sweet natural gas, and can be from the mud after the part mummification.
Claims (4)
1. one kind is utilized the mud of sludge drying tail gas afterheat to store and primary heater unit, it is characterized in that having closed mud storage vault (1), closed mud storage vault (1) one end is provided with the first mud input aperture (9) and the second mud input aperture (10), closed mud storage vault (1) is provided with and pushes away the capable rail of mud machine (4), pushing away the capable rail of mud machine (4) is provided with first and pushes away mud machine (2) and second and push away mud machine (3), closed mud storage vault (1) the other end is provided with the first mud delivery port (11) and the second mud delivery port (12), the first mud delivery port (11) is connected with sewage sludge feed device (13) with the second mud delivery port (12), sewage sludge feed device (13) is connected by the sludge inlet (25) of transport tape with the first sludge drying device (30), the first sludge drying device (30) is connected with heating stove (26) with the 4th air door (29) by the 3rd air door (28) respectively with the second sludge drying device (31), the first sludge drying device (30) and the second sludge drying device (31) are connected with the flue (33) of closed mud storage vault (1) bottom respectively by after the 3rd vent-pipe (32) and first air door (7) and second air door (8) parallel connection, flue (33) passes closed mud storage vault bottom, with second vent-pipe (16), water film dedusting air-removal equipment (17), second induced draft fan (18), chimney (19) is connected successively, high pressure water pipe (21) and flue (33), priming device (22) catchments, settling tank (23), water pump (20) is connected, and closed mud storage vault (1) is by first induced draft fan (15), first vent-pipe (14) is connected with heating stove (26).
2. a kind of mud of sludge drying tail gas afterheat that utilizes according to claim 1 stores and primary heater unit, it is characterized in that described closed mud storage vault (1) bottom is provided with knee wall (5), knee wall body of wall height is 0.8～2.0m, and standoff distance is 0.5～1.5m between body of wall and the body of wall.
3. a kind of mud of sludge drying tail gas afterheat that utilizes according to claim 1 stores and primary heater unit, it is characterized in that constituting flue (33) between described two knee walls (5) body of wall, and the flue width is 0.5～1.5m, and flue height is 0.8～2.0m.
4. a kind of mud of sludge drying tail gas afterheat that utilizes according to claim 1 stores and primary heater unit, it is characterized in that the ground of described flue (33) is 2～5 inclinations of spending from advancing mouth to smoke outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100691781A CN100462316C (en) | 2007-06-05 | 2007-06-05 | Sludge storing and preheating system utilizing sludge drying tail gas afterheat |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100691781A CN100462316C (en) | 2007-06-05 | 2007-06-05 | Sludge storing and preheating system utilizing sludge drying tail gas afterheat |
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| Publication Number | Publication Date |
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| CN101066831A CN101066831A (en) | 2007-11-07 |
| CN100462316C true CN100462316C (en) | 2009-02-18 |
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| CNB2007100691781A Expired - Fee Related CN100462316C (en) | 2007-06-05 | 2007-06-05 | Sludge storing and preheating system utilizing sludge drying tail gas afterheat |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101274813B (en) * | 2008-05-09 | 2010-06-09 | 浙江大学 | Tail gas waste heat recovery and reutilization sludge drying system |
| CN101913744B (en) * | 2010-07-22 | 2012-01-18 | 清华大学 | Biophysical drying device and method of continuous flow sludge |
| CN102557378B (en) * | 2011-05-16 | 2013-10-16 | 南京鑫翔新型建筑材料有限责任公司 | Sludge drying process |
| CN104803568B (en) * | 2015-03-11 | 2017-06-23 | 杰瑞环保科技有限公司 | For the feed arrangement and its method of work of oil field waste processing system |
| CN111908749B (en) * | 2020-08-17 | 2021-09-03 | 薛维晋 | Sludge dry-wet differentiation treatment method |
| CN113354231B (en) * | 2021-07-02 | 2022-09-02 | 江西科技学院 | Treatment device and treatment method for heavy metals in reservoir sediment |
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|---|---|---|---|---|
| CN1686878A (en) * | 2005-04-04 | 2005-10-26 | 浙江大学 | Anhydration system for sludge by using remaining heat of flue gas from steam power plant |
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| CN1884160A (en) * | 2006-07-07 | 2006-12-27 | 浙江大学 | Sludge drying and granulating system by using residual heat of exhaust flue gas in garbage power |
| CN1884159A (en) * | 2006-07-06 | 2006-12-27 | 浙江大学 | Parallel type low-power consumption sludge drying and granulating system |
| CN201059854Y (en) * | 2007-06-05 | 2008-05-14 | 浙江大学 | Sludge storage and primary heater unit using sludge anhydration tail gas residual heat |
-
2007
- 2007-06-05 CN CNB2007100691781A patent/CN100462316C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1686878A (en) * | 2005-04-04 | 2005-10-26 | 浙江大学 | Anhydration system for sludge by using remaining heat of flue gas from steam power plant |
| CN1868937A (en) * | 2006-04-04 | 2006-11-29 | 浙江大学 | Sludge drying system using combination of smoke residual heat and two external heat supply sources |
| CN1884159A (en) * | 2006-07-06 | 2006-12-27 | 浙江大学 | Parallel type low-power consumption sludge drying and granulating system |
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| CN101066831A (en) | 2007-11-07 |
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