CN108773992A - Sludge treatment system and method for treating sludge by using same - Google Patents
Sludge treatment system and method for treating sludge by using same Download PDFInfo
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- CN108773992A CN108773992A CN201810283243.9A CN201810283243A CN108773992A CN 108773992 A CN108773992 A CN 108773992A CN 201810283243 A CN201810283243 A CN 201810283243A CN 108773992 A CN108773992 A CN 108773992A
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- sludge
- pyrohydrolysis
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- 239000010802 sludge Substances 0.000 title claims abstract description 347
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 51
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 41
- 238000001035 drying Methods 0.000 claims abstract description 41
- 238000012545 processing Methods 0.000 claims abstract description 39
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- 238000000926 separation method Methods 0.000 claims description 40
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- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
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- 150000003839 salts Chemical class 0.000 description 2
- 230000004936 stimulating effect Effects 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- DWNBOPVKNPVNQG-LURJTMIESA-N (2s)-4-hydroxy-2-(propylamino)butanoic acid Chemical compound CCCN[C@H](C(O)=O)CCO DWNBOPVKNPVNQG-LURJTMIESA-N 0.000 description 1
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 description 1
- 102000002322 Egg Proteins Human genes 0.000 description 1
- 108010000912 Egg Proteins Proteins 0.000 description 1
- 241000544912 Melanoides Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000003377 acid catalyst Substances 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
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- 230000008020 evaporation Effects 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/10—Treatment of sludge; Devices therefor by pyrolysis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/84—Biological processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
-
- 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
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention provides a sludge treatment system and a method for treating sludge by using the same. This sludge treatment system includes steam generator and pyrohydrolysis device, the pyrohydrolysis device utilizes the steam of steam generator output to preheat the pyrohydrolysis device, receive mud after reaching preheating temperature, and utilize the steam of steam generator output to make the mud pyrohydrolysis in the pyrohydrolysis device, mud through pyrohydrolysis then through energy recuperation device cooling and step-down, the exhaust hydrolysis mud generates the graininess biological carbon soil that solid content is 65% ~ 78% through dehydration drying device, the process still gets rid of foul gas through the whole journey of foul gas processing apparatus. The sludge treatment system and the method of the invention have the advantages of full thermal hydrolysis reaction of the sludge, no need of adding chemical reagents, high solid content of the dewatered sludge, energy and water consumption saving through energy recovery, and the full process of removing malodorous gases, along with sanitation and environmental protection.
Description
Technical field
The present invention relates to sludge treating systems, more particularly relate to the dirt of processing urban wastewater treatment firm dewatered sludge
Mud treatment system.The invention further relates to the methods for using the sludge treating system to handle sludge.
Background technology
Urban wastewater treatment firm dewatered sludge refers to the sludge that urban wastewater treatment firm generates in processing procedure, through centrifugation
After dewaterer dehydration, obtains a kind of solid content and reach 15%~20%, by organic debris, microorganism, inorganic particle, colloid
The extremely complex heterogeneous body of equal compositions.It is characterized in that moisture content is high, parasitic ovum, pathogenic microorganism content height, it is perishable,
There is strong stink.If do not dealt carefully with, secondary pollution is easily caused.At present the treatment technology of sludge include desiccation, burning,
Landfill and agricultural use etc..Wherein hydrothermal carbonization with its low energy consumption, effectively improve dehydration property and reduce sludge ecology danger
The advantages such as evil property, become the hot spot of research sludge reduction and recycling.《Urban sewage treatment plant sludge processing disposal technology refers to
Southern (tentative)》In also recommend high temperature and pressure pyrohydrolysis pre-process (Thermal Hydrolysis Pre-Treatment).
In existing high temperature and pressure pyrohydrolysis preconditioning technique, mainly there are 2 kinds of routes, one is 60 DEG C~170 DEG C hot water
Solution+anaerobic digestion process.Microbial cell broken wall, releasing organics, to improve anaerobic digestion are carried out using temperature raising
Efficiency provides more thermal energy, to heat sludge, realizes heat recovery.Such as green (Cambi) company of health uses pyrohydrolysis
+ anaerobic digestion process obtains the biological carbon soil of solid content 40% or so.If the final burning disposal of sludge needs further to do
Change.
Another kind is the hydrothermal carbonization (Hydrothermal of 180 DEG C of temperatures above based on Maillard reaction
Carbonization).The study found that after temperature is more than 175 DEG C, Maillard reaction can be greatly improved, promotes the albumen of hydrolysis
Polycondensation reaction occurs for the amino of matter and the aldehyde radical of polysaccharide, generates polycondensation propylhomoserin, ammonia nitrogen and the brown materials such as melanoid and humic acid,
The multi-functional carbon based material (currently popular major name is hydro-thermal charcoal in the world) for forming high added value, can be applied to fuel,
The numerous areas such as soil improvement, CO2 are fixed, pollutant adsorbs.Therefore there is hydrothermal carbonization (being more than 180 degree)+press filtration mutually to tie
The process route of conjunction.But hydrothermal carbonization technology development time is shorter, processing performance for example treatment effeciency, carbon soil solid content, yield,
Charcoal soil nature energy, capacity usage ratio, device reliability, still have greatly improved in the degree of automation etc. space.
The patent CN106103402A- that Suez international corporation delivers has the continuous thermal hydrolysis side of the sludge of high degree of dryness
Method, patent CN106795024A- are optimized by hydrothermal carbonization and filtration drying method and drying device, CN201680002327-
The hydrothermal carbonization method and apparatus of energy efficiency, it is proposed that the hydrothermal carbonization of sludge+filtration drying method, it is to dehydrated material
In the carbonization pressure of 0.6 to 3.5 megapascal, and hydrothermal carbonization and filtration drying under 140 to 300 DEG C of carburizing temperature.It is pressed
Power and temperature range are wide, and carbon soil nature can be to be improved with solid content, and filtration drying has to be optimized.
Cities of the patent CN201611104585- based on hydrothermal carbonization that Weifang gold pathogenic microorganism fertilizer Co., Ltd delivers
Method for sludge treatment, low temperature holding again after this method is heated at high temperature, carries out hydrothermal carbonization reaction, in depth in incinerator after dehydration
Dewatered sludge particle is made in desiccation.It is different from the technology of the present invention route, finished product.
A kind of Treatment of Sludge based on hydrothermal carbonization of patent CN201621176805- that Shenzhen Xianjin Technology Academe delivers
System, the system are directed to the sewage plant sludge after dewaterer is dehydrated and handle, first homogeneous, then the reaction of hydrothermal carbonization kettle, separating and dehydrating
Machine is dehydrated, molding machine squeezing forming, the system route of last drying machine drying.This patent system and this patent system principle phase
Seemingly, but technology path is different.
What a kind of sludge pyrohydrolysis of patent CN201611240853- that Hunan Jun Xin sludge treatments Co., Ltd delivers generated
The method and apparatus of high concentration foul gas processing, uses S1：Pyrohydrolysis foul smell washs and heat exchange；S2：Burn deodorization；S3：Change
Learn washing deodorization；S4：Biological deodorizing, last foul smell qualified discharge.It is different from this process gas processing line.
A kind of hydrothermal carbonizations of patent CN201710151691- that Beijing is delivered along Hong Jinjian environmental science and technology Development Co., Ltd
Handle a kind of hydrothermal carbonization processing sludge of the method for sludge, CN201710151692- prepare fertilizer method,
A kind of methods that hydrothermal carbonization processing sludge prepares fuel of CN201710151693-, it is characterised in that acid catalyst is added, such as
The concentrated sulfuric acid, concentrated nitric acid etc. is added.The concentrated sulfuric acid and nitric acid belong to hazardous chemical, and the present invention does not use, safer, economical.Therefore,
The present invention reacts with it mechanism difference, process route and device difference.
Invention content
The object of the present invention is to provide the improved sludge treating systems and method to solve the above problems with defect.
According to an aspect of the present invention, a kind of sludge treating system is provided, including：
Steam generation facility, for exporting steam；A kind of sludge treating system, which is characterized in that including：
Steam generation facility, the steam for exporting first pressure and the first temperature；
Pyrohydrolysis device is connect with steam generation facility Fluid Sealing, to utilize the steam of steam generation facility output
Pyrohydrolysis device is preheating to second temperature, pyrohydrolysis device further includes sludge receiving opening, for being preheated in pyrohydrolysis device
It receives sludge after to second temperature, and so that the sludge in pyrohydrolysis device is reached the using the steam that steam generation facility exports
Two pressure, temperature reach third temperature, carry out pyrohydrolysis reaction.
Pyrohydrolysis device is preheating to second temperature by the steam exported by using steam generation facility, can make the dirt of reception
Mud by Steam dilution, improves mobility first, and promotion is uniformly mixed with the steam that the sludge of reception is heated to third temperature,
And since pyrohydrolysis device is preheated to second temperature so that the sludge of reception is easier to be heated to third temperature so that
The temperature of sludge pyrohydrolysis precisely controls.
Preferably, pyrohydrolysis device is connect by nozzle arranged at the bottom with steam generation facility Fluid Sealing, is led to
It crosses the sludge receiving opening being arranged in the middle part of pyrohydrolysis device and receives sludge, and further include blender in pyrohydrolysis device,
For making sludge reach second pressure in the steam exported using steam generation facility, temperature reaches in third temperature course, with
And carry out in pyrohydrolysis reaction process, stir the sludge in pyrohydrolysis device.
Nozzle setting is arranged in pyrohydrolysis device bottom plate, sludge receiving opening in the middle part of pyrohydrolysis device, may make sludge
It from the sludge receiving opening dropping process in the middle part of pyrohydrolysis device, is come into full contact with the steam sprayed upwards, promotes sludge and steam
Being uniformly mixed for vapour, promotes the heating of sludge so that the temperature of sludge pyrohydrolysis precisely controls.Blender can promote hot water
The sludge of bottom of device and being uniformly mixed for steam are solved, promotes the heating of sludge so that the temperature of sludge pyrohydrolysis is more accurately
Control.Nozzle can be rapidly injected with turbulence form under certain speed, and fast with dewatered sludge under high velocity turbulent flow effect
Speed equably mixes, and sludge is made to be rapidly heated, and carries out pyrohydrolysis reaction.
Preferably, pyrohydrolysis device further includes being arranged in inside and the guide shell on nozzle, for matching with blender
It closes and sludge is promoted to be uniformly mixed with steam.
The sludge of pyrohydrolysis bottom of device and steam can be circulated up by guide shell, and by the dirt of pyrohydrolysis bottom of device
Mud recycles downwards, thus promotes mixing up and down for sludge and steam, promotes the heating of sludge so that the temperature of sludge pyrohydrolysis is more
It accurately controls.
Preferably, pyrohydrolysis device further includes being arranged in internal multiple temperature sensors, and the rotating speed of blender can
It adjusts, when the temperature of multiple temperature sensors is inconsistent, increases the rotating speed of blender to promote sludge to be uniformly mixed with steam.
The setting of temperature sensor can be visually known the Temperature Distribution of sludge in pyrohydrolysis device, work as temperature distributing disproportionation
When even, illustrate that sludge and steam need further mixing, increasing the rotating speed of blender at this time can promote sludge to be mixed with steam
It is even so that the temperature of sludge pyrohydrolysis precisely controls.
Preferably, pyrohydrolysis device further includes nozzle rinse device, for the flooding nozzle when nozzle is by sludge blockage.
Nozzle arranged at the bottom can may in time be carried out nozzle and steam pipework by sludge blockage, nozzle rinse device
Cleaning does not influence the operation of the system and method for the present invention.
Preferably, further include sludge preheating can in pyrohydrolysis device upstream, the sludge agitation in sludge preheating can upstream
Device, and the low-pressure steam generator that is connect respectively with sludge preheating can and sludge stirring device Fluid Sealing, low pressure are steamed
Vapour generator generates the steam of third pressure and the 4th temperature using the heating that recovers energy, and thus realizes sludge stirring device dirty
The stirring of mud and sludge are mixed with the first of steam, and sludge preheating device is made to realize that sludge is mixed with the secondary of steam.
Low-pressure steam generator using recover energy generate steam, preheat sludge stirring device, make sludge be easy to stirring and
Conveying, the steam that low-pressure steam generator generates can also preheat sludge preheating can so that sludge temperature further increases, mobility
Enhancing is ready for postorder pyrohydrolysis in pyrohydrolysis device, and steam and the uniform of sludge in pyrohydrolysis device is promoted to mix
It closes, is easy and fast to reach pyrohydrolysis reaction temperature, is easy to pyrohydrolysis temperature and accurately controls.
Preferably, further include the dewatering drying device being connect with pyrohydrolysis device Fluid Sealing in pyrohydrolysis device downstream,
It is then further cooling, dry under negative pressure for the sludge after pyrohydrolysis to be carried out dehydration briquetting, obtain solid content 65%~
78% biological carbon soil.
Dewatering performance of sludge after pyrohydrolysis improves, hygienic environment-protecting, by dewatering drying device by the sludge after pyrohydrolysis
Dehydration can between obtain biological carbon native produce, which can be used as fertilizer, also can be used as fuel and directly burn.Dewatering drying device
It is set as negative pressure, the volatile matter in dewatered biological carbon soil can be made quickly to volatilize, temperature rapid decrease is conducive to biological carbon soil
Stabilization, while further removing moisture removal, obtain the biological carbon soil of solid content 65%~78%.
Preferably, dewatering drying device obtains blocky mud cake using plate and frame filter press by pyrohydrolysis sludge dewatering briquetting, produces
Raw mud cake falls into following cooling transmitting device, and cooling transmitting device includes negative pressure device, and under the action of negative pressure, mud cake is into one
The cooling drying of step.
Preferably, further include foul gas processing unit, including pressure duct and normal pressure pipeline, pressure duct one end fluid
It is sealingly connected to pyrohydrolysis device, is connected to the other end Fluid Sealing steam-water separation tower, water of the gas from gas-water separation tower
Envelope enters chemical reaction tower and is chemically treated after emerging, be connected to sludge treating system to normal pressure pipeline one end Fluid Sealing
It connects to the device Fluid Sealing in addition to pyrohydrolysis device under normal pressure or negative pressure, negative pressure device arranges the foul smell of collection
It is put into gas-water separation tower, gas enters chemical reaction tower and is chemically treated after emerging from the water seal of gas-water separation tower.
Sludge treating system according to the present invention and method are difference separately handled according to foul gas pressure, improve evil
Odour treatment effeciency, eliminates foul gas most possibly, improves environment, reduces pollution.
Preferably, further include energy recycle device, be used for the dirt from the pyrohydrolysis exported through pipeline by pyrohydrolysis device
Mud recovers energy.
Preferably, energy recycle device includes the multistage heat exchange network being connected in series with, and includes cooling per level-one heat exchange network
Thus water pipe is provided per level-one with the cooling water after the recovering energy of different temperatures, it is described recover energy after cooling water energy
The enough water supply according to its temperature for steam generation facility, low-pressure steam generator or flushing water system, to save energy and use
Water.
Preferably, the position after from the pipeline of pyrohydrolysis reactor heat outputting hydrolyzing sludge by energy-recuperation system
Place, further includes pyrohydrolysis mud discharging pump, is used for the dewatering drying device of pyrohydrolysis mud discharging to downstream, the emptying pump
It is set as making the pressure reduction after emptying pump of the sludge from pipeline.
Preferably, the emptying pump includes high-pressure side and low-pressure side, and the high-pressure side of the pump is exported with from pyrohydrolysis reactor
The pipeline of pyrohydrolysis sludge is connected, and low-pressure side is connected with dewatering drying device.
It is connected with from the pipeline of pyrohydrolysis reactor heat outputting hydrolyzing sludge by setting the emptying pump to high-pressure side,
Its low-pressure side is connected with dewatering drying device, and the pyrohydrolysis sludge of high temperature and pressure declines by pressure after emptying pump, or even reaches
To negative pressure so that production it is safer, promote discharge pyrohydrolysis sludge in volatile matter volatilization, fast cooling, be conducive to
The stability of the biological carbon soil obtained afterwards.
Preferably, the sludge is urban wastewater treatment firm dewatered sludge.
Preferably, the first temperature is 230 DEG C~250 DEG C, and second temperature is 180 DEG C~230 DEG C, and third temperature is 180 DEG C
~230 DEG C, the first pressure is 30bar~40bar, and second pressure is 15bar~28bar.
Preferably, the 4th temperature is 60 DEG C~90 DEG C, and third pressure is normal pressure pressure.
Preferably, the steam generation facility generates high temperature and high pressure steam or access external steam.
According to a further aspect of the invention, a kind of system processing sludge using described in any one of preceding claims is provided
Method, include the following steps：
Start steam generation facility, the steam of first pressure and the first temperature can be exported；
Steam generation facility is connect with pyrohydrolysis reactor Fluid Sealing, the steam exported using steam generation facility
Pyrohydrolysis reactor is preheated to second temperature, pyrohydrolysis device further includes sludge receiving opening, for being preheated in pyrohydrolysis device
It receives sludge after to second temperature, and so that the sludge in pyrohydrolysis device is reached the using the steam that steam generation facility exports
Two pressure, temperature reach third temperature, carry out pyrohydrolysis reaction.
Preferably, pyrohydrolysis device is connect by nozzle arranged at the bottom with steam generation facility Fluid Sealing, is led to
It crosses the sludge receiving opening being arranged in the middle part of pyrohydrolysis device and receives sludge, and further include blender in pyrohydrolysis device,
For making sludge reach second pressure in the steam exported using steam generation facility, temperature reaches in third temperature course, and
It carries out in pyrohydrolysis reaction process, stirs the sludge in pyrohydrolysis device.
Preferably, being coordinated with blender using guide shell promotes sludge to be uniformly mixed with steam.
Preferably, using the multiple monitors temperatures being arranged in inside, and the rotating speed of blender is adjustable,
When the temperature of multiple temperature sensors is inconsistent, increase the rotating speed of blender to promote sludge to be uniformly mixed with steam.
Preferably, nozzle rinse device is set, for the flooding nozzle when nozzle is by sludge blockage.
Preferably, further include that sludge preheating can is set in pyrohydrolysis device upstream, sludge is set in sludge preheating can upstream
Agitating device, and the low-pressure steam that setting is connect with sludge preheating can and sludge stirring device Fluid Sealing respectively occur
Device, low-pressure steam generator are generated the steam of third pressure and the 4th temperature using the heating that recovers energy, thus make sludge agitation
Device is passed through the steam of third pressure and the 4th temperature when stirring sludge, realizes that sludge is mixed with the first of steam, makes sludge
Preheating device is passed through third pressure and the steam of third temperature realizes that sludge is mixed with the secondary of steam.
Preferably, further include that the sludge after pyrohydrolysis is subjected to dehydration briquetting using dewatering drying device, then in negative pressure
It is lower further cooling, dry, obtain the biological carbon soil of solid content 65%~78%.
Preferably, dewatering drying device obtains blocky mud cake using plate and frame filter press by pyrohydrolysis sludge dewatering briquetting, produces
Raw mud cake falls into following cooling transmitting device, and cooling transmitting device includes negative pressure device, and under the action of negative pressure, mud cake is into one
The cooling drying of step.
Preferably, further include the foul gas Fluid Sealing that pyrohydrolysis device is discharged using foul gas processing unit
It is connected to steam-water separation tower, gas enters chemical reaction tower and is chemically treated after emerging from the water seal of gas-water separation tower, will be dirty
The foul gas of the device discharge in addition to pyrohydrolysis device under normal pressure or negative pressure of mud treatment system is filled using negative pressure
It sets and collects and be discharged into gas-water separation tower, gas enters chemical reaction tower after emerging from the water seal of gas-water separation tower carries out from chemistry
Reason.
Preferably, it is recovered energy from the pyrohydrolysis sludge exported through pipeline by pyrohydrolysis device using energy recycle device.
Preferably, energy recycle device includes the multistage heat exchange network being connected in series with, and includes cooling per level-one heat exchange network
Water pipe, thus per level-one provide with different temperatures the cooling water to recover energy, it is described recover energy after cooling water can
According to its temperature for steam generation facility, low-pressure steam generator or the water supply for rinsing water system, to save energy and use water
Amount.
Preferably, the position after from the pipeline of pyrohydrolysis reactor heat outputting hydrolyzing sludge by energy-recuperation system
Pyrohydrolysis mud discharging pump is arranged in place, for by the dewatering drying device of pyrohydrolysis mud discharging to downstream, the emptying pump to be set
Being set to makes the pressure reduction after emptying pump of the sludge from pipeline.
Preferably, the emptying pump includes high-pressure side and low-pressure side, the pump be set as high-pressure side with from pyrohydrolysis reactor
The pipeline of heat outputting hydrolyzing sludge is connected, and low-pressure side is connected with dewatering drying device.
The advantageous effect of technical solution provided by the invention is：
(1) the present invention provides a kind of sludge treating system and methods, can be the dehydration dirt of solid content 15%~20%
Mud is processed into the dark brown biological carbon soil of solid content 65%~78%, thus：
1) make 1/3 to 1/4 that volume-diminished is original, reduce freight volume, reduce Treatment of Sludge expense；
2) damp dewatered sludge has a peculiar smell, and after especially fermenting, peculiar smell bigger, when transport, mud and smell are easy leakage
Go out, surrounding enviroment is caused to pollute.It is the soil of drying after being processed into dark brown biological carbon soil, convenient transportation is not revealed, Er Qietong
After crossing Odor control, smell is small, and microorganism thoroughly kills, and wholesomeness is good；
3) biological carbon soil of the solid content more than 65% can use rotary kiln etc. directly to burn, and not need secondary desiccation；
4) high organic content of biological carbon soil is a kind of good agricultural fertilizer when heavy metal is not exceeded.
(2) heating of pyrohydrolysis reactor is not used and is directly heated, but uses steam Hybrid Heating, although increasing
The water content of hydrolyzing sludge, but under the action of pyrohydrolysis reactor so that hydrolyzing sludge is easier to stir, and mobility is more preferable,
It is more evenly distributed, temperature more preferably controls.
(3) of the invention since the design of pyrohydrolysis reactor makes pyrohydrolysis reaction that can fully carry out completely, without making
Use strong acid as catalyst, safety is environmentally friendly, reduces the corrosion of system, reduces the material requirement of mud line, reduces fee of material
With.
(4) relative to secondary desiccation apparatus, for the present invention by level Four energy regenerating, energy consumption is reduced to secondary desiccation apparatus
1/3, the energy is saved, although less than the solid content of secondary desiccation apparatus product 90%, the carbon soil of the present invention has reached combustion
It burns and requires.
(5) the biological carbon soil that filter press comes out in the present invention is transported to transport vehicle by blending transport device.Meanwhile it producing
The negative pressure that raw gas is generated by negative-pressure air fan is transported to malodorous gas processing system and is handled.This process has following
Feature：Cross-ventilation under the biological carbon soil of temperature higher (50 DEG C~60 DEG C) acts on transmission device with negative-pressure air fan steams
Hair, drops to room temperature, accelerates the volatilization of biological carbon soil fugitive constituent, reduces the remaining fugitive constituent of biological carbon soil, is conducive to biology
The stabilization of carbon soil.The foul gas and steam volatilized will not be revealed on closed transmission device, not endanger environment；Out
Biological carbon soil fugitive constituent it is few, foul gas is few, is conducive to the transport of foul gas, reduces environmental pollution, at the same solid content into
One step improves, and increases by 1% or so.
(6) the present invention provides different foul gas collection processing system implementings.It is for high temperature and pressure foul gas A and generally
The different characteristics of foul gas B, is treated with a certain discrimination, is separately handled.After steam-water separation, remix.
The high temperature and pressure foul gas of the present invention collects processing pipeline and includes steam-water separation tower, chemically react tower, is biological anti-
Answer tower, activated carbon adsorption device, chimney and its pipeline and valve.
The normal temperature and pressure foul gas processing pipeline of the present invention includes that negative pressure collects wind turbine, steam-water separation tower, chemical reaction
Tower, biological respinse tower, activated carbon adsorption device, chimney and its pipeline and valve.
Thus it has the characteristics that：
1) it utilizes the water in steam-water separation tower to retain most pollutant, so that pollutant is dissolved into water, be then discharged out
Dope is identical as filter press filtrate contamination class.Therefore, it can be handled together with filtrate.When air inflow or the effluvium scale of construction
When increase, increase inflow.The method is at low cost, and effect is good, easy to control；
2) steam-water separation tower, chemical reaction tower and biological respinse tower, three tower Combined Treatments can effectively remove pollutant, make
Gas qualified discharge.To ensure reliability, before discharge, activated carbon adsorption is set.In particular, when accident condition, can absorb in short-term
A large amount of pollutants, improve system reliability.
(7) the present invention provides cooling water systems and flushing water system.Cooling water is dirty convenient for the energy regenerating of equipment, hydrolysis
Mud gradually cools down.Stop cleaning of the water system for device is rinsed, it is significant, remaining sludge in device is removed, is kept away
The blocking for having exempted from device reduces the corrosion of system, extends the service life of device, and the startup for next time provides guarantee, is machine
The safe operation of device creates condition.
(8) sludge treating system of the invention and method high degree of automation, operation control is simple, and continuity is good, is convenient for
Industrialized production, sludge leak point is few, and sludge is not easy to plug, and plant area's spatter property is high.And it is compact-sized, it takes up little area, low energy consumption
(relative to desiccation), it is cost-effective.
(9) sludge treating system provided by the invention and method realize automation control by electrical and pneumatic valve,
Human resources are saved, operation is easy to operate.
Description of the drawings
Fig. 1 is the process principle figure of the present invention；
Fig. 2 is sewage sludge storage and pre-heating system, sludge hot hydrolysis system and energy-recuperation system process flow chart；
Fig. 3 is dehydration drying system process flow chart；
Fig. 4 is the enlarged drawing of mud discharging pump；
Fig. 5 is the biological carbon native produce obtained according to the system of the embodiment of the present invention, for broken thin biological carbon cake；
Fig. 6 is the product according to the system production of the embodiment of the present invention：The biological carbon cake of solid content 78%.
Fig. 7 is the schematic block diagram according to the malodorous gas processing system of the embodiment of the present invention.
Specific implementation mode
Fig. 1 is the schematic diagram according to the sludge treating system of the present invention.It can be seen from figure 1 that sludge treating system includes 5
Technique subsystem is sludge hydrolytic system, energy-recuperation system, dehydration drying system, malodorous gas processing system and punching respectively
Wash water system is introduced respectively referring to Fig. 1.
Sludge hydrolytic system：Including sludge storage pool 11, sludge delivery pump 12, sludge stirring machine 13, sludge preheating can 14,
Sewage sludge feed pump 15 and pyrohydrolysis device 21.
Sewage treatment plant's dewatered sludge of solid content 15%~20% is stored into sewage sludge storage pond, uses professional sealed sludge
Vehicle transports sewage sludge storage pond 11, mixing is stirred by sewage sludge storage pond bottom stirrer, then through sludge delivery pump 12
Be transported to high-order sludge stirring machine 13, wherein sludge stirring machine 13 is power sludge stirring machine, using with double-screw shaft,
The inclined-plane of reverse cut and adjustable propeller may make that sludge agitation is uniform.Sludge stirring machine 13 is equipped with steam inlet tube,
Sludge mixes for the first time herein with steam, is preheating to 60 DEG C~90 DEG C, and then sludge falls into sludge preheating can 14, mixed with secondary steam
(main mixing) is closed, it is defeated with sewage sludge feed pump 15 by manual inlet valve control outlet sludge temperature to T0 (60 DEG C~90 DEG C)
Send mud mixture to pyrohydrolysis device 21, meanwhile, the high temperature and high pressure steam that steam generator device 22 or external heat source come
(such as steam power plant) enters pyrohydrolysis reactor 21 from bottom, 180 is further heated to using steam in pyrohydrolysis device 21
DEG C~230 DEG C, pressure reaches 15bar~28bar, by mud vapour Hybrid Heating, carries out pyrohydrolysis, is formed after pyrohydrolysis
Temperature T1 (180 DEG C~230 DEG C), the hydrolyzing sludge of pressure P1 (15~28bar).
Energy-recuperation system：It is to recycle the energy of sludge hydrolytic system to be cooled down to sludge hydrolytic system.
Hydrolyzing sludge is walked in the pipe of energy recycle device, and cooling water is walked outside pipe.Energy recycle device is substantially carried out heat exchange and recuperation of heat,
It is divided into level Four recycling, heat transmission equipment is pipe heat exchanger, and the muddy water after hydrolysis is through four sections of energy recycle devices 31,32,33,34
Cool down with 35, eventually drops to 70 DEG C~80 DEG C, pressure is less than 0.5bar, hydrolyzing sludge of the solid content 10% or so, storage
It is stored in hydrolyzing sludge holding vessel.Hydrolyzing sludge is introduced into level-one heat exchange network 31, hydrolyzing sludge temperature T2=T1-10 or so,
Pressure P2 ≈ P1.Then, into evaporator 32, continue heat exchange cooling, outlet temperature T3=T2-50 or so, pressure P3=P2-
0.1 or so.Evaporator 32 is low-pressure steam generator, refers in particular to pyrohydrolysis mud is used to use for low-pressure system as heat source herein
Steam generation facility.Subsequently into two level heat exchange network 33, continue to cool, outlet temperature T4=T3-25 or so, pressure P4
=P3-0.1 or so.Into 34 three-level heat exchange network A, continue to cool, outlet temperature T5=T4-10 or so, pressure P5=
P4-0.1 or so.Into 35 three-level heat exchange network B, outlet temperature T6=T5-25 or so, it is less than 100 degree, pressure P6=P5-
0.1 or so.
Cooling water in energy recycle device derives from plant area's industry water.Industry water adds through sub-cooled water pump 66 all the way
Pressure, into 35 three-level heat exchange network B, after heat exchange, temperature reaches 60 degree or so, into boiler 67, as flushing water source.
Industry water is stored in sweet-water tank 62 through 61 desalination of desalination water preparation apparatus all the way.A part of demineralized water is through medium temperature
Make-up pump 64 pressurizes, and into 34 three-level heat exchange network A, after countercurrent flow, exit water temperature rises to 95 degree or more, as steaming
The water inlet for sending out 32 cooling water of device continues heat exchange heating, more than 100 degree, a large amount of steam is generated, into sludge stirring machine 13 and sludge
Preheating can 14 is preheated to dewatered sludge.Extra water enters boiler 67.Another part demineralized water pumps 63 dozens through boiler feedwater
Pressure, into two level heat exchange network 33, water outlet enters back into level-one heat exchange network 31, and after heat exchange, exit water temperature is close to T2, temperature
It is very high, into steam generator device 22 energy of heating is reduced as 22 water source.
Cooling water has carried out effective recycling to energy and has made full use of after four sections of different utilizations.
Hydrolyzing sludge is discharged into following dehydration drying system after energy-recuperation system.
Dehydration drying system：Hydrolyzing sludge in hydrolyzing sludge storage tank is inputted filter press, filter-press dehydration is carried out, obtains 50
DEG C~60 DEG C or so of hot biological carbon soil, cool down using negative pressure and evaporate, finally obtains the dark brown of solid content 65%~78%
Biological carbon soil.It may be used as fuel, building material, agricultural fertilizer etc..The hydrolyzing sludge that energy-recuperation system comes is through exporting water
Temperature is less than 100 degree when solving the pipe outlet discharge of sludge, and pressure about P6=P1-2 is depressurized to through mud discharging pump 40 and is less than
Enter hydrolyzing sludge storage tower 41 after 0.5bar.Hydrolyzing sludge temperature is at 70 DEG C~80 DEG C in hydrolyzing sludge storage tower 41, P7
For normal pressure, solid content DS is 10% or so.It is conveyed into filter-pressing device 43 with plate and frame filter press feed pump 42, a period of time squeezes
Afterwards, 50 DEG C~60 DEG C or so of hot biological carbon soil is obtained, filtrate enters filtrate processing system and handled (not in model of the present invention
It encloses).The present invention selects plate and frame filter press, obtains blocky mud cake.The mud cake of generation falls into following cooling and blends transmitting device 44,
In the case where negative pressure and power blend effect, the volatilization of moisture and foul gas in mud cake is accelerated, makes mud cake cooling, further do
It is dry, it is then delivered to storage bucket, the biological carbon soil of solid content 65%~78% can be obtained.For further processing, under
The transport vehicle in face can transport power plant as fuel, transport to cement plant as building material, transport to farmland as fertilizer etc..
Wherein, mud discharging pump 40 also acts as antihypertensive effect by special designing in addition to conveying hydrolyzing sludge, pumping out
Mouth pressure drops to 0.5bar or less.Fig. 4 is the enlarged drawing of mud discharging pump 40, and as shown in Figure 4, mud discharging pump 40 includes dirt
Mud import 401 and sludge outlet 402, the mud discharging pump 40 are the inversions normally pumped, and sludge import 401 is going out of normally pumping
Mouth, i.e. high-pressure side, and sludge outlet 402 is the import normally pumped, i.e. low-pressure side, sludge import 401 is connected to output hydrolysis dirt
The pipe outlet of mud connects, and sludge outlet 402 is connect with dehydration drying system.Pyrohydrolysis sludge after energy regenerating passes through this
Emptying pump 40 is discharged, and the pressure of 402 sides of outlet drops to 0.5bar, and the volatile matter in the pyrohydrolysis sludge of discharge thus can be made quick
Volatilization, drops to room temperature, reduces the remaining fugitive constituent of biological carbon soil, is conducive to the stabilization of biological carbon soil.
It is cooling blend transmitting device 44 be in the environment of sealing, negative pressure, using with double-screw shaft, reverse cut it is oblique
Face and adjustable propeller blend mud cake, to accelerate the volatilization of moisture and foul gas in mud cake so that biological carbon
The ordorless smell of soil, meanwhile, aridity further increases.
Pyrohydrolysis, dehydration drying system material all using 304L stainless steels, corroded and abrasion with reducing.
Malodorous gas processing system：For removing the foul gas in processing procedure, including A lines and B lines, A lines are for going
High temperature (being more than 100 degree) high pressure (pressure the is more than 15bar) high concentration generated during the reaction except pyrohydrolysis reactor 22
Foul gas, B lines be used for remove other systems generate low temperature, low pressure, low concentration general foul gas B.It is shown in Fig. 7
The schematic block diagram of malodorous gas processing system according to an embodiment of the invention.
In pyrohydrolysis process, a large amount of irritation foul gas are generated, main component is hydrogen sulfide, ammonia, methyl mercaptan, first sulphur
Ether, carbon disulfide are needed to collect, be handled to handle these gases.Because present system has high temperature and high pressure gas and room temperature
Atmosphere gas (normal temperature and pressure gas), the characteristics of for this 2 kinds of gases, it is proposed that first distinguish, then comprehensive processing route, such as scheme
Shown in 7.
Wherein, general foul gas first passes through negative pressure and collects the collection of wind turbine 51, then blasts steam-water separation tower 52 and carry out carbonated drink
Separation and solution absorption；High temperature and pressure foul gas directly blasts steam-water separation tower 52 and carries out steam-water separation, solution absorption and drop
Warm (20~40 DEG C) then converge into chemical reaction tower 53, biological respinse tower 54 and carry out reaction removal.Finally pass through activated carbon
The safety assurance of adsorbent equipment 55, the gas for making out reach《Emission standard for odor pollutants》Exhaust tube in GB14554-1993
Emission limit and factory circle are primary standard when height is 15 meters, and《Atmosphere pollution comprehensive discharge standard》 (GB16297-1996)
Middle exhaust tube height corresponding primary standard when being 15 meters.
For A lines, pressure is more than 15bar, and temperature is more than 100 degree, therefore, can be in pipe internal pressure containing a large amount of water vapours
Enter steam-water separation tower 52-A under power and carry out steam-water separation, gas is made to emerge from water seal, into chemical reaction tower 53.At this point,
Foul gas temperature out drops to 20 DEG C~50 DEG C.Meanwhile using flowing water, removing pollutant in foul gas.
For B lines, we collect wind turbine 51 using negative pressure and generate negative pressure, to collect every other foul gas, effluvium
Temperature is low, and containing moisture, but humidity ratio line A is much lower, therefore, into steam-water separation tower 52-B, in addition to steam-water separation, mainly
It is to utilize flowing water, removes pollutant in foul gas.Gas is emerged from top, also enters chemical reaction tower 53.
At this point, the water stayed in steam-water separation tower 52 has retained most pollutant, become white, emulsus has strong
The liquid of penetrating odor.Therefore, it is necessary to one side into foul gas, and on one side into industry water, high-concentration waste liquid, waste liquid are discharged on one side
It is identical as filtrate contamination type, therefore, these waste liquids are discharged into filtrate processing system and filtrate and are handled together (not in the present invention
Range).
Into chemical reaction tower 53 foul gas reacted with chemical agent, generate it is various it is insoluble precipitation with can
The salt of dissolving, reaches certain proportion, is periodically discharged into filtrate processing system.By the separation and chemical reaction of steam-water separation tower 52
The reaction of tower 53, contained stimulating component eliminate 95% or more, and burden is alleviated for subsequent processing.
Treated, and foul gas enters biological respinse tower 54.Using microorganism to the hydrogen sulfide in foul gas, ammonia, first
Mercaptan, methyl sulfide, carbon disulfide etc. are converted.Ensure that the foul gas of discharge reaches《Emission standard for odor pollutants》
Emission limit and factory's boundary mark are accurate when exhaust tube height is 15 meters in GB14554-1993, and《Atmosphere pollution comprehensive discharge standard》
(GB16297-1996) corresponding primary standard when exhaust tube height is 15 meters in.Finally, up to standard for guarantee foul gas accident
Discharge, is adsorbed using activated carbon adsorption device 55.
It rinses water system and is to ensure clean, the cleaning of system and device, prevent from blocking and corrode, and system is rushed
It washes.The main back with water inlet line including on blow-down pipe and hydrolysis mud line.One is the cleanings for filter-pressing device and transport device；
Another kind is for the cleaning after shutting down.Because mud is easy pollution, blocks, it is therefore proposed that using hot water as flushing water, work as heat
When water is inadequate, cold water flush can be first used, then uses hot water injection.The water outlet of high pressure washing water pump 69 only goes pyrohydrolysis anti-
Answer device.Other rinse the water outlet for all using low-pressure washing water pump 68.
Thus we see that, the present invention does not use strong acid as catalyst, safety, environmental protection.The heating of reactor
It does not use and directly heats, but use steam as heat source, it is anti-in pyrohydrolysis although increasing the water content of hydrolyzing sludge
Under the action of answering device 21 so that hydrolyzing sludge is easier to stir, and mobility is more preferable, is more evenly distributed.It is filled relative to secondary desiccation
It sets, for the present invention by level Four energy regenerating, energy consumption is reduced to the 1/3 of secondary desiccation apparatus, has saved the energy, although less than secondary
The solid content of desiccation apparatus product 90%, but the carbon soil of the present invention has reached combustion requirements.
Fig. 2 is sewage sludge storage and pre-heating system, sludge hot hydrolysis system and energy-recuperation system process flow chart；Fig. 3 is
The production of sludge treating system according to the present invention is described in detail referring to Fig. 2 and Fig. 3 for dehydration drying system process flow chart
Process and operating method.The operation of this system generally comprises three phases：Start warm-up phase, production phase and shut down and rinses rank
Section.In order to clearly indicate the superiority of present invention process, the efficient profit of industrialized production characteristic, the spatter property of plant area and the energy
With being described separately below from these three operation stages.
Start warm-up phase：
Check whole system, it is ensured that valve, the correctness of equipment, operability.
Carry out startup preheating.
First, it allows steam generator device 22 to generate high temperature and high pressure steam or access external steam, pressure is kept to exist
30bar, temperature is at 230 degree to 250 degree.Then, it opens and rinses water system, into pyrohydrolysis reactor 21, at this point, opening pneumatic
Valve V114 and V115.After water level is to set liquid level, steam valve V212, V213, V215, V217 are opened, injects steam, is carried out
Heating, until 180 DEG C~230 DEG C.
Then V211, V314, V315, V318, emptying pump 40-A and 40-B and V413 are opened, pipe trench is discharged into.On the one hand, may be used
On the other hand the operability of appliance integrality and control system can be checked with detergent line.
Cooling water system is opened, valve V312 and V111, V112 are opened, steam is generated using evaporator 32, preheats sludge,
When export sludge temperature to T0 (60 DEG C~90 DEG C) after, close pyrohydrolysis reactor 21 water inlet, close operated pneumatic valve V114 with
V115。
Start warm-up phase to terminate, the production phase can be entered.
Production phase：
Therefore the present invention is introduced by operation production sequence introduction according to 5 subsystems, pipeline and valve.
It is stored and is preheated first.The general solid content DS (dryness) of dewatered sludge in sewage sludge storage pond 11 is
15%~20%.Turn on agitator M11 and M12 are stirred 11 base sludge of sewage sludge storage pond, are then turned on sludge conveying
For 12 conveying sludge of pump to high-order sludge stirring machine 13, sludge stirring machine 13 is equipped with steam inlet tube P113, steam inlet tube P113 and
Evaporator 32 communicates, and V111 is kept to open, and sludge mixes for the first time with steam, enters from the front end hole of sludge stirring machine 13
Sludge preheating can 14, sludge preheating can 14 also have steam inlet tube P114, steam inlet tube P114 to be communicated with evaporator 32, keep
V112 is opened, and blender M14 and M15 is opened, sludge with steam progress is secondary mixes, secondary mixing is mainly to mix, and heating is set
It is standby.Outlet sludge temperature is controlled to 60 DEG C~90 DEG C by manual inlet valve V111, V112, is started sewage sludge feed pump 15, is opened
Valve V113 and V115 carry out pyrohydrolysis by P115 pipelines mud mixture to pyrohydrolysis reactor 21.
Muddy water enters pyrohydrolysis reactor 21 from medium position.Meanwhile it being steamed from the high temperature and pressure of steam generation facility 22
Vapour enters pyrohydrolysis reactor 21 from bottom position always, is mixed with muddy water, opens blender M21 stirrings, pyrohydrolysis reactor
Sludge final pressure in 21 reaches 15~28bar, and temperature reaches 180 DEG C~230 DEG C, improves the Maillard reaction of sludge,
Form hydrolyzing sludge.Pyrohydrolysis reaction after the completion of, open pneumatic operated valve V211, in pyrohydrolysis reactor 21 pressure (15~
Under 28bar), hydrolyzing sludge enters energy recycle device from pipeline P211.
As shown in 21 in Fig. 2, pyrohydrolysis reactor 21 is cylindrical appliance, and there is agitating device in centre.It is according to the present invention
Pyrohydrolysis reactor 21 can be such that sludge and steam is uniformly mixed, and can accurately control pyrohydrolysis temperature, this passes through following
One or more features combination realize：
1) the blender M21 of pyrohydrolysis reactor 21 is mounted on the top of pyrohydrolysis reactor 21, and blade setting is being reacted
Middle and lower part position inside device, and in inside reactor middle and lower part position；
2) round guide shell (not shown) has been adjacent to it with the blade of blender M21；
3) steam enters from nozzle from bottom two, and inlet point is under guide shell bottom；
4) dewatered sludge enters from the middle part side of pyrohydrolysis reactor 21；
5) realize that the upper and lower of some strength circulates, by guide shell to make using the agitation of blender and plug-flow
The dewatered sludge entered in the middle part of reactor is uniformly mixed with the high steam entered from bottom；
6) high steam enters pyrohydrolysis reactor 21 by nozzle, which can be with turbulence form under certain speed
It is rapidly injected, and is quickly and evenly mixed with dewatered sludge under high velocity turbulent flow effect, so that sludge is rapidly heated, carry out hot water
Solution reaction；
7) nozzle and coupled admission passage further include dirty stifled cleaning device comprising high-pressure pump and flush pipe,
In sludge treating system operation process according to the present invention, when steam jet generates dirty block up, throttle flow can reduce, therefore heat
21 temperature of hydrolysis reactor is less than setting value, at this moment needs to rinse steam admission passage and nozzle, first turns on high-pressure pump, make punching
It washes overpressure and reaches 30bar, then open pneumatic operated valve V215, rinse admission passage and nozzle, after the completion of flushing, close valve
V215；
8) it is to realize that accurate temperature controlling and mud vapour are sufficiently mixed, different height/position is additionally provided with 3 temperature in reactor
Sensor needs to tune up agitator speed, the rotating speed of blender is in 50-200RPM if 3 temperature sensor numerical value are different
In range；
9) ratio of height to diameter of cylindrical hot water solution reactor is preferably arranged to 4-5, and it is equal with steam which is more suitable for sludge
Even mixing, can precise control of temperature, be conducive to pyrohydrolysis reaction abundant progress.
In pyrohydrolysis device, it is sufficiently mixed due to the use of steam and sludge and carries out sludge heating so that hydrolyzing sludge stream
Dynamic property is more preferable, by entering sludge in the middle part of pyrohydrolysis reaction unit, and blender is arranged, and react and fill from pyrohydrolysis
Bottom set portion is passed through steam, in addition caused by guide shell up and down circulate effect so that the mixing of sludge and steam evenly,
The more uniform temperature of sludge, sludge hot hydrolysis temperature accurately control, and pyrohydrolysis reaction is abundant, it is not necessary that chemical reagent is added, safety,
Environmental protection, cost-effectiveness are high.Sludge is preheated in sludge storage tank using steam before entering in pyrohydrolysis reaction unit
And the mobility and stirring property of sludge are also improved, dirt is promoted using the preheating to recover energy in sludge stirring device
Abundant pyrohydrolysis of the mud in pyrohydrolysis reaction unit.By the way that pyrohydrolysis device is preheated via steam generation facility so that connect
The sludge of receipts is diluted, it is easier to is uniformly mixed with steam and be reached pyrohydrolysis temperature, mix progress with sludge by using steam
Sludge heats so that hydrolyzing sludge good fluidity is evenly distributed, and temperature control is accurate, and pyrohydrolysis reaction is abundant, is not necessarily to additionization
Learn reagent, safety, environmental protection, cost-effectiveness height.
After sludge fully reacts in pyrohydrolysis reactor 21, it is discharged from pyrohydrolysis reactor 21, by energy regenerating
System.Hydrolyzing sludge enters the pipe heat exchanger 31 of level-one heat exchange network from pipeline P311, exchanges heat, subsequently into evaporator
32.Wherein hydrolyzing sludge is walked in pipe, and cooling water pipe P318 is walked outside pipe, and cooling water water outlet is warming up to 180 degree or more, is sent out as steam
Raw device water source, saves steam generator energy.Cooling water pipe P318 of the cooling water from two level heat exchange network 33.
Then, for hydrolyzing sludge after the heat exchange cooling of evaporator 32, outlet temperature declines 50 degree or so, enters two through pipe P319
The pipe heat exchanger 33-1 of grade heat exchange network 33.Wherein hydrolyzing sludge is walked in evaporator tube, and cooling water is walked outside pipe, and cooling water comes from
The cooling water of three-level heat exchange network 34, cooling water are heated to 100 degree or more, steam are generated, into sludge stirring machine 13 and dirt
Mud preheating can 14, remainder cooling water enter boiler 67.
Then, hydrolyzing sludge enters the pipe heat exchanger 33-2 of two level heat exchange network 33 through pipe P319.Continue to cool,
Decline 25 degree or so from the inlet to the outlet, into three-level heat exchange network 34.Wherein, hydrolyzing sludge is walked in pipe, cooling water pipe P318
It walks outside pipe, cooling water comes from steam generator small pump 63, after heat exchange, the water inlet as 31 cooling water of level-one heat exchange network.
Keep V314 full-gears, hydrolyzing sludge through pipe P321 into 34 three-level heat exchange network A pipe heat exchanger 34-1,
34-2.Hydrolyzing sludge continues to cool, and declines 10 degree or so, into 35 three-level heat exchange network B.Wherein, hydrolyzing sludge walks pipe
Interior, cooling water pipe P315 is walked outside pipe, and cooling water comes from medium temperature cooling water pump 64, and after heat exchange, cooling water pipe P315 water outlets, which enter, steams
Send out device 32.
Keep V315 full-gears, hydrolyzing sludge through pipe P322 into 35 three-level heat exchange network B pipe heat exchanger 35-1,
35-2.Hydrolyzing sludge continues to cool, and declines 25 degree or so, outlet temperature is less than 100 degree.Wherein, hydrolyzing sludge is walked in pipe,
Cooling water is walked outside pipe, and cooling water comes from sub-cooled water pump 66, and after heat exchange, water outlet enters evaporator 32.
Subsequently, the sludge through energy regenerating is dehydrated.V318 and V413 full-gears are kept, sludge row is opened
Pump 40-A and 40-B open states are put, enter hydrolyzing sludge storage tower 41 through pipe P322, P323, P324, P325 and P412.Water
Solution sludge temperature drops to 70 DEG C~80 DEG C by 90 DEG C or so, and pressure drops to the left sides 0.2bar by mud discharging pump by 15bar or more
The right side, solid content DS is 10% or so.Open valve V415 and filter press feed pump 42, conveying hydrolyzing sludge into filter-pressing device 43,
After the completion of squeezing, 50 DEG C or so of hot biological carbon soil is obtained, filtrate is discharged into filtrate processing system through pipeline P414, is handled
(not in the scope of the invention).The present invention selects plate and frame filter press, obtains blocky mud cake.The mud cake of generation falls into following cooling biography
Defeated device 44 accelerates the volatilization of moisture and gas in mud cake under the action of negative pressure, makes mud cake cooling, is further dried, then
It is transported to storage bucket, the biological carbon soil of solid content 65%~78% can be obtained.For further processing, following fortune is fallen into
Defeated vehicle, pulls away and is recycled.After every batch of mud cake is collected, filter press 43 and transport device 44 need high pressure water washing, such as Fig. 4
It is shown, using high pressure washing water pump 69 come hot water, rinse filter press 43 and transport device 44, cleaning performance is good, and waste water is discharged into
Filtrate processing system.
Sludge treating system according to this embodiment of the invention further includes foul gas processing unit, in production process
Middle progress foul gas processing stage, the foul gas processing unit include the foul gas pipeline A lines and room temperature of high temperature and pressure
The foul gas processing pipeline B lines of normal pressure.It deals with relationship A lines for high temperature and pressure foul gas, it is anti-to be only derived from sludge hydrolytic
The pipe P214 of device 21, pressure is answered to be more than 15bar, temperature is more than 100 degree, therefore, can containing a large amount of water vapours and organic matter
Steam-water separation is carried out to enter steam-water separation tower 52 under overpressure, opens V501, gas is emerged from water seal, through pipe P512
Into chemical reaction tower 53.At this point, gas temperature out drops to 20 DEG C~50 DEG C.
For normal temperature and pressure foul gas processing pipeline B lines, we collect wind turbine 51 using negative pressure and generate negative pressure, pass through pipe
P118 and P415 collects every other gas, and normal temperature and pressure gas temperature is low, containing less moisture, therefore, it is also desirable to enter
Steam-water separation tower 52 mainly utilizes water in addition to steam-water separation, removes pollutant in gas.Then, open V501, gas from
It emerges in water seal, enters chemical reaction tower 53 through pipe P512.
At this point, the water stayed in steam-water separation tower 52 has retained most of dissolved contaminants, become white, emulsus has
The liquid of intense irritation smell.Therefore, it is necessary to one side into gas, and on one side into industry water, waste liquid is discharged on one side, with filtrate dirt
It is identical to contaminate type.Therefore, these waste liquids filtrate processing system and filtrate is discharged into be handled together (not in the scope of the invention).
The gas for entering chemical reaction tower 53 through pipe P512, is reacted with chemical agent, and it is various insoluble heavy to generate
It forms sediment and soluble salt, reaches certain proportion, be discharged at regular time and quantity.Separation by steam-water separation tower 52 and chemical reaction tower
53 reaction, contained stimulating component eliminate 95% or more, and burden is alleviated for subsequent processing.
V502 is opened, gas enters biological respinse tower 54 through pipe P515.Using microorganism in gas hydrogen sulfide, ammonia,
Methyl mercaptan, methyl sulfide, carbon disulfide etc. are converted.Then, open V503, through pipe P518 enter activated carbon adsorption device 55 into
Row absorption finally through P519 pipes and wind turbine 56, passes through chimney qualified discharge.
Shut down rinse stage：
When we need maintenance down, it is also necessary to carry out shutdown rinse stage, it is ensured that it is clean in the present apparatus, it does not block.
It is idle (off-stream) unit to shut down, and keeps all devices closed state, closes valve.Before this, ensure sludge in equipment
It is emptied with hydrolyzing sludge.
In shutting down rinse stage, first, pneumatic operated valve V116 is opened, rinse sewage sludge storage pond 11, is then turned on sludge conveying
Pump 12 and sewage sludge feed pump 15, blender M11, M12 and M13, flushing water enter sludge stirring machine 13, sludge preheating can 14, so
It is discharged afterwards from P116, after the completion of cleaning, closes valve and equipment, empty residual liquid.This process cleaning flushing sewage sludge storage
Pond 11, sludge stirring machine 13 and sludge preheating can 14.
Pneumatic operated valve V114, V115 are opened, V113 is closed, keeps closing into steam valve, cleans pyrohydrolysis reactor 21, open
Pneumatic operated valve V211 is discharged from P331.After the completion of cleaning, valve and equipment are closed, empties residual liquid.This process cleaning hot water
Solve reactor 21.
Valve V311 is opened, V314 and V211 is closed, cleaning level-one heat exchange network 31 is discharged from P331.After the completion of cleaning, instead
It to flushing, is not discharged from P331, opens V314 and V315, be discharged from P337, cleaning evaporator 32,33 and of two level heat exchange network
Three-level heat exchange network A 34.After the completion of cleaning, valve and equipment are closed, empties residual liquid.This process cleaning level-one heat is handed over
Draping 31, evaporator 32, two level heat exchange network 33 and three-level heat exchange network A 34.
Valve V316, V315, V318, V413 are opened, emptying pump 40 is opened, is discharged from P432.After the completion of cleaning, valve is closed
And equipment, empty residual liquid.This process cleaning three-level heat exchange network B 35, emptying pump 40, hydrolyzing sludge storage tower 41.
Valve V415, filter press feed pump 42 are opened, filtrate system is discharged into from P414.After the completion of cleaning, closes valve and set
It is standby, empty residual liquid.This process cleaning filter press pipeline.
So far, all devices are rinsed well, are shut down flushing process and are terminated.
The description controlled from these three operation stages, we can see that this automation technolo degree is high, operation control letter
Single, continuity is good, is convenient for industrialized production, and sludge breakthrough point is few, and plant area's spatter property is high.
It is the application example according to the preferred method and apparatus of the invention in practice below.
Example 1:Sewage treatment plant of Hebei province dewatered sludge hydrothermal carbonization (HTC) and dehydration and drying project
Sludge samples sources：Sewage treatment plant of Hebei province dewatered sludge, solid content DS:16% or so, volatile solid
VS(volatile solid):70% or so.
Processing procedure：It is handled by apparatus of the present invention.185 DEG C~210 DEG C of controlling reaction temperature, reaction pressure 16bar~
23bar, the solid content DS for obtaining hydrolyzing sludge in sewage sludge storage tank are 8.5%~9.5%.Through plate compression, cooling evaporation, most
The DS of the biological carbon soil obtained eventually is 65%~78%.
Table 1 is the log under the engineering different temperatures.
Fig. 5 is the biological carbon native produce that the device obtains, for broken thin biological carbon cake.
Fig. 6 is the device product：The biological carbon cake of solid content 78%.
Log of the engineering of table 1. at a temperature of differential responses
It should be noted that the embodiment is merely exemplary, not should be is limitation of the present invention, in multiple realities
It applies the feature in mode to can be used in combination to obtain more embodiments of the present invention, the scope of the present invention is only by appended right
It is required that limiting.Various deformation form can be made to the embodiment and improved form is made without departing from the scope of the present invention.
Reference sign
Storage and preheating device have：11 be dewatered sludge storage pool, and 12 be sludge delivery pump, and 13 be sludge stirring machine, 14
It is sludge preheating can, 15 be sewage sludge feed pump；
Pyrohydrolysis device has：21 be pyrohydrolysis reactor, and 22 be steam generator device；
Energy recycle device has：31 be level-one heat exchange network, and 32 be evaporator, and 33 be two level heat exchange network, and 34 be three-level
Heat exchange network A, 35 be three-level heat exchange network B；
Dewatering drying device has：40 be mud discharging pump, and 41 be hydrolyzing sludge storage tower, and 42 be filter press feed pump, 43
It is filter-pressing device, 44 be cooling transmitting device；
Foul gas collection and treatment device has：51 be that negative pressure collects wind turbine, and 52 be steam-water separation tower, and 53 be chemical reaction
Tower, 54 be biological respinse tower, and 55 be activated carbon adsorption device, and 56 be chimney；
Auxiliary equipment has：61 be desalination water preparation apparatus, and 62 be sweet-water tank, and 63 be make-up evaporator feed pump, during 64 are
Warm cooling water pump, 65 be medicament delivery pump, and 66 be sub-cooled water pump, and 67 be boiler, and 68 be low-pressure washing water pump, and 69 be high
Press flush water pump.
In Fig. 2/3/4 divided by subscript extra, other label declarations：31 be level-one heat exchange network；
33-1 is the 1st tubing heat exchanger of two level heat exchange network, and 33-2 is the 2nd tubing heat exchanger；
34-1 is the 1st tubing heat exchanger of three-level heat exchange network A, and 34-2 is the 2nd tubing heat exchanger；
35-1 is the 1st tubing heat exchanger of three-level heat exchange network B, and 35-2 is the 2nd tubing heat exchanger；
P*** in Fig. 2/3/4 is pipeline number, and V*** numbers for valve, and valve is only to help to illustrate technology controlling and process in figure
Valve added by process does not represent true valve.Rectangle oblique line in figure on pipeline is only to help to illustrate to pay attention to heat preservation, is not wrapped
Containing all utilidors.
Claims (30)
1. a kind of sludge treating system, which is characterized in that including：
Steam generation facility, the steam for exporting first pressure and the first temperature；
Pyrohydrolysis device is connect with steam generation facility Fluid Sealing, will be hot with the steam using steam generation facility output
Hydrolysis device is preheating to second temperature, and pyrohydrolysis device further includes sludge receiving opening, for being preheating in pyrohydrolysis device
Sludge is received after two temperature, and so that the sludge in pyrohydrolysis device is reached the second pressure using the steam that steam generation facility exports
Power, temperature reach third temperature, carry out pyrohydrolysis reaction.
2. sludge treating system according to claim 1, which is characterized in that pyrohydrolysis device passes through spray arranged at the bottom
Mouth is connect with steam generation facility Fluid Sealing, is received by the sludge receiving opening being arranged in the middle part of pyrohydrolysis device dirty
Mud, and further include blender in pyrohydrolysis device, for making sludge reach in the steam exported using steam generation facility
Second pressure, temperature reach in third temperature course, and carry out in pyrohydrolysis reaction process, stir the dirt in pyrohydrolysis device
Mud.
3. sludge treating system according to claim 2, which is characterized in that pyrohydrolysis device further include setting internal and
Guide shell on nozzle promotes sludge to be uniformly mixed with steam for coordinating with blender.
4. sludge treating system according to claim 2 or 3, which is characterized in that including pyrohydrolysis device further includes setting
Multiple temperature sensors in portion, and the rotating speed of blender is adjustable, when the temperature of multiple temperature sensors is inconsistent, increases
The rotating speed of blender is to promote sludge to be uniformly mixed with steam.
5. sludge treating system according to claim 2 or 3, which is characterized in that pyrohydrolysis device further includes nozzle rinse
Device, for the flooding nozzle when nozzle is by sludge blockage.
6. sludge treating system according to any one of the preceding claims, which is characterized in that further include being filled in pyrohydrolysis
Set the sludge preheating can of upstream, the sludge stirring device in sludge preheating can upstream, and respectively with sludge preheating can and sludge
The low-pressure steam generator connected to agitating device Fluid Sealing, low-pressure steam hair device use, which recovers energy to heat, generates third pressure
Thus the steam of power and the 4th temperature makes sludge stirring device realize that the stirring of sludge and sludge are mixed with the first of steam,
Sludge preheating device is set to realize that sludge is mixed with the secondary of steam.
7. sludge treating system according to any one of the preceding claims, which is characterized in that further include being filled in pyrohydrolysis
The dewatering drying device that downstream is connect with pyrohydrolysis device Fluid Sealing is set, for the sludge after pyrohydrolysis to be carried out dehydration pressure
Block, it is then further cooling, dry under negative pressure, obtain the biological carbon soil of solid content 65%~78%.
8. sludge treating system according to claim 7, which is characterized in that dewatering drying device will using plate and frame filter press
Pyrohydrolysis sludge dewatering briquetting, obtains blocky mud cake, and the mud cake of generation falls into following cooling transmitting device, cooling transmitting device
Including negative pressure device, under the action of negative pressure, mud cake further cools down drying.
9. sludge treating system according to any one of the preceding claims, which is characterized in that further include at foul gas
Device, including pressure duct and normal pressure pipeline are managed, is connected to pyrohydrolysis device, other end stream to pressure duct one end Fluid Sealing
Body is sealingly connected to steam-water separation tower, and gas enters chemical reaction tower after emerging from the water seal of gas-water separation tower carries out from chemistry
Reason, be connected to normal pressure pipeline one end Fluid Sealing sludge treating system under normal pressure or negative pressure except pyrohydrolysis device it
It connects to outer device Fluid Sealing, the foul smell of collection is discharged into gas-water separation tower by negative pressure device, and gas is from gas-water separation tower
Water seal emerge after enter chemical reaction tower be chemically treated.
10. according to the sludge treating system described in any one of aforementioned claim, which is characterized in that further include energy regenerating dress
It sets, is used to recover energy from the sludge of the pyrohydrolysis exported through pipeline by pyrohydrolysis device.
11. sludge treating system according to claim 10, which is characterized in that energy recycle device includes being connected in series with
Multistage heat exchange network includes cooling water pipe per level-one heat exchange network, and recovering energy with different temperatures is thus provided per level-one
Cooling water afterwards, it is described recover energy after cooling water can according to its temperature for steam generation facility, low-pressure steam occur
Device or the water supply for rinsing water system, to save energy and water consumption.
12. in sludge treating system according to claim 10, which is characterized in that exporting hot water from pyrohydrolysis reactor
Solve the pipeline of sludge by the position after energy-recuperation system at, further include pyrohydrolysis mud discharging pump, for by pyrohydrolysis
To the dewatering drying device in downstream, the emptying pump is set as that the sludge from pipeline is made to press after emptying pump mud discharging
Power reduces.
13. sludge treating system according to claim 12, which is characterized in that the emptying pump includes high-pressure side and low pressure
Side, the high-pressure side of the pump are connected with from the pipeline of pyrohydrolysis reactor heat outputting hydrolyzing sludge, and low-pressure side is filled with dehydration and drying
It sets connected.
14. sludge treating system according to any one of the preceding claims, which is characterized in that the sludge is that cities and towns are dirty
Water treatment plant's dewatered sludge.
15. sludge treating system according to claim 1, which is characterized in that the first temperature be 230 DEG C~250 DEG C, second
Temperature is 180 DEG C~230 DEG C, and third temperature is 180 DEG C~230 DEG C, and the first pressure is 30bar~40bar, second pressure
For 15bar~28bar.
16. sludge treating system according to claim 6, which is characterized in that the 4th temperature is 60 DEG C~90 DEG C, third pressure
Power is normal pressure pressure.
17. sludge treating system according to any one of the preceding claims, which is characterized in that the steam generation facility
Generate high temperature and high pressure steam or access external steam.
18. a kind of method that system using described in any one of preceding claims handles sludge, includes the following steps：
Start steam generation facility, the steam of first pressure and the first temperature can be exported；
Steam generation facility is connect with pyrohydrolysis reactor Fluid Sealing, the steam preheating exported using steam generation facility
For pyrohydrolysis reactor to second temperature, pyrohydrolysis device further includes sludge receiving opening, for being preheating in pyrohydrolysis device
Sludge is received after two temperature, and so that the sludge in pyrohydrolysis device is reached the second pressure using the steam that steam generation facility exports
Power, temperature reach third temperature, carry out pyrohydrolysis reaction.
19. method for sludge treatment according to claim 18, which is characterized in that pyrohydrolysis device passes through arranged at the bottom
Nozzle is connect with steam generation facility Fluid Sealing, is received by the sludge receiving opening being arranged in the middle part of pyrohydrolysis device dirty
Mud, and further include blender in pyrohydrolysis device, for making sludge reach in the steam exported using steam generation facility
Second pressure, temperature reach in third temperature course, and carry out in pyrohydrolysis reaction process, stir the dirt in pyrohydrolysis device
Mud.
20. method for sludge treatment according to claim 19, which is characterized in that promoted using guide shell and blender cooperation
Sludge is uniformly mixed with steam.
21. the method for sludge treatment according to claim 19 or 20, which is characterized in that utilize the multiple temperature being arranged in inside
Sensor monitoring temperature is spent, and the rotating speed of blender is adjustable, when the temperature of multiple temperature sensors is inconsistent, increase is stirred
The rotating speed of device is mixed to promote sludge to be uniformly mixed with steam.
22. the method for sludge treatment according to claim 19 or 20, which is characterized in that setting nozzle rinse device is used for
The flooding nozzle when nozzle is by sludge blockage.
23. according to the method for sludge treatment described in any one of preceding claims 18-22, which is characterized in that further include in heat
Hydrolysis device upstream be arranged sludge preheating can, sludge preheating can upstream be arranged sludge stirring device, and setting respectively with dirt
The low-pressure steam generator connected to mud preheating can and sludge stirring device Fluid Sealing, low-pressure steam generator use recycling energy
Amount heating generates the steam of third pressure and the 4th temperature, and sludge stirring device is thus made to be passed through third pressure when stirring sludge
And the 4th temperature steam, realize sludge mixed with the first of steam, so that sludge preheating device is passed through third pressure and third temperature
The steam of degree realizes that sludge is mixed with the secondary of steam.
24. according to the method for sludge treatment described in any one of preceding claims 18-23, which is characterized in that further include using
Sludge after pyrohydrolysis is carried out dehydration briquetting by dewatering drying device, then further cooling, dry under negative pressure, is obtained containing solid
The biological carbon soil of rate 65%~78%.
25. according to the method for sludge treatment described in preceding claims 24, which is characterized in that dewatering drying device uses sheet frame pressure
Pyrohydrolysis sludge dewatering briquetting is obtained blocky mud cake, the mud cake of generation falls into following cooling transmitting device, cooling to pass by filter
Defeated device includes negative pressure device, and under the action of negative pressure, mud cake further cools down drying.
26. according to the method for sludge treatment described in any one of preceding claims 18-25, which is characterized in that further include using
The foul gas Fluid Sealing that pyrohydrolysis device is discharged is connected to steam-water separation tower by foul gas processing unit, and gas is from gas
The water seal of water separation column enters chemical reaction tower and is chemically treated after emerging, sludge treating system is in normal pressure or negative pressure
Under in addition to pyrohydrolysis device device discharge foul gas gas-water separation tower, gas are collected and are discharged into using negative pressure device
Body enters chemical reaction tower and is chemically treated after emerging from the water seal of gas-water separation tower.
27. according to the method for sludge treatment described in any one of preceding claims 18-26, which is characterized in that returned using energy
Receiving apparatus recovers energy from the pyrohydrolysis sludge exported through pipeline by pyrohydrolysis device.
28. method for sludge treatment according to claim 27, which is characterized in that energy recycle device includes being connected in series with
Multistage heat exchange network includes cooling water pipe per level-one heat exchange network, and recovering energy with different temperatures is thus provided per level-one
Cooling water, it is described recover energy after cooling water can according to its temperature for steam generation facility, low-pressure steam generator
Or the water supply of water system is rinsed, to save energy and water consumption.
29. method for sludge treatment according to claim 27, which is characterized in that exporting pyrohydrolysis from pyrohydrolysis reactor
The pipeline of sludge passes through at the position after energy-recuperation system, pyrohydrolysis mud discharging pump is arranged, for by pyrohydrolysis sludge
It is discharged into the dewatering drying device in downstream, the emptying pump is set as making the pressure drop after emptying pump of the sludge from pipeline
It is low.
30. method for sludge treatment according to claim 29, which is characterized in that the emptying pump includes high-pressure side and low pressure
Side, the pump are set as high-pressure side and are connected with from the pipeline of pyrohydrolysis reactor heat outputting hydrolyzing sludge, low-pressure side and dehydration and drying
Device is connected.
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| CN108773992B (en) | 2024-08-20 |
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