CN208732883U - sludge treatment system - Google Patents
sludge treatment system Download PDFInfo
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- CN208732883U CN208732883U CN201820452696.5U CN201820452696U CN208732883U CN 208732883 U CN208732883 U CN 208732883U CN 201820452696 U CN201820452696 U CN 201820452696U CN 208732883 U CN208732883 U CN 208732883U
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Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Treatment Of Sludge (AREA)
Abstract
The utility model provides a sludge treatment system. 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 utility model discloses a sludge treatment system makes mud pyrohydrolysis react fully, need not to add chemical reagent, and the dewatered sludge contains solid rate height, through energy recuperation energy saving and water consumption, and whole journey gets rid of foul gas, sanitary environmental protection.
Description
Technical field
The utility model relates to sludge treating systems, more particularly relate to processing urban wastewater treatment firm dewatered sludge
Sludge treating system.
Background technique
Urban wastewater treatment firm dewatered sludge refers to the sludge that urban wastewater treatment firm generates during processing, through being centrifuged
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 processing technique 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 pretreatment (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 are carried out using temperature raising, to improve anaerobic digestion
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 Maillard reaction can be greatly improved after temperature is more than 175 DEG C, promote 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)+filters pressing 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- pass through hydrothermal carbonization and filtration drying method and drying device, CN201680002327- optimization
The hydrothermal carbonization method and apparatus of energy efficiency propose hydrothermal carbonization+filtration drying method of sludge, 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.
City 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 utility model technology path, finished product.
A kind of Treatment of Sludge based on hydrothermal carbonization of the 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 dehydration, molding machine squeezing forming, the dry system route of last drying machine.This patent system and this patent system principle phase
Seemingly, but technology path is different.
A kind of sludge pyrohydrolysis of the patent CN201611240853- that Hunan Jun Xin sludge treatment Co., Ltd delivers generates
The method and apparatus of high concentration foul gas processing, uses S1: the washing of pyrohydrolysis foul smell and heat exchange；S2: deodorization is burned；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 carbonization 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 method 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 utility model does not use, safer, economical.
Therefore, the utility model reacts with it mechanism difference, process route and device difference.
Utility model content
The purpose of the utility model is to provide the improved sludge treating systems to solve the above problems with defect.
According to the utility model, a kind of sludge treating system is provided, comprising:
Steam generation facility, for exporting steam；A kind of sludge treating system characterized by comprising
Steam generation facility, for exporting the steam of 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 preheating 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 using steam generation facility, received dirt can be made
Mud passes through Steam dilution first, improves mobility, and promotion is uniformly mixed with the steam that received sludge is heated to third temperature,
And since pyrohydrolysis device is preheated to second temperature, so that received sludge 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 the middle part of pyrohydrolysis device in pyrohydrolysis device bottom plate, sludge receiving opening, may make sludge
It from the sludge receiving opening dropping process in the middle part of pyrohydrolysis device, comes into full contact with, promote sludge and steams with the steam sprayed upwards
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 under certain speed with turbulence form, 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 that inside and the guide shell on nozzle is arranged in, 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 internal multiple temperature sensors being arranged in, and the revolving speed of blender can
It adjusts, when the temperature of multiple temperature sensors is inconsistent, increases the revolving speed of blender to promote sludge to be uniformly mixed with steam.
The setting of temperature sensor can intuitively understand the Temperature Distribution of sludge in pyrohydrolysis device, work as temperature distributing disproportionation
When even, illustrate that sludge and steam need further mixing, the revolving speed for increasing blender at this time can promote sludge and mix 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 be carried out in time nozzle and steam pipework by sludge blockage, nozzle rinse device
Cleaning, does not influence the operation of the system of the utility model.
It 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 connecting 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 generates steam using recovering energy, and preheats sludge stirring device, make sludge be easy to stir 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.
It preferably, further include the dewatering drying device being connect in pyrohydrolysis device downstream with pyrohydrolysis device Fluid Sealing,
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
Walk cooling drying.
It 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 utility model is separately handled according to the difference of foul gas pressure, improves stench
Gas treatment efficiency, eliminates foul gas most possibly, improves environment, reduces pollution.
Preferably, further include energy recycle device, be used for the dirt from the pyrohydrolysis exported by pyrohydrolysis device through pipeline
Mud recovers energy.
Preferably, energy recycle device includes the multistage heat exchange network being connected in series, and every level-one heat exchange network includes cooling
Water pipe, thus every level-one provides the cooling water after having 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 passing through energy recycling system from the pipeline of pyrohydrolysis reactor heat outputting hydrolyzing sludge
Place, further includes pyrohydrolysis mud discharging pump, for by 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 by setting high-pressure side for the emptying pump with from the pipeline of pyrohydrolysis reactor heat outputting hydrolyzing sludge,
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 is safer, promote the volatilization of volatile matter in the pyrohydrolysis sludge of discharge, 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.
The beneficial effect of technical solution provided by the utility model is:
(1) the utility model provides a kind of sludge treating system, can be the dewatered sludge of solid content 15%~20%
It 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 is bigger, and when transport, mud and smell are easy leakage
Out, surrounding enviroment are caused to pollute.It is dry soil, convenient transportation is not revealed, Er Qietong after being processed into dark brown biological carbon soil
After crossing Odor control, smell is small, and microorganism thoroughly kills, and wholesomeness is good；
3) biological carbon soil of the solid content greater than 65% can be used rotary kiln etc. and directly 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, mobility is more preferable,
It is more evenly distributed, temperature more preferably controls.
(3) the utility model due to pyrohydrolysis reactor design so that pyrohydrolysis reaction can sufficiently carry out completely, nothing
Strong acid need to be used as catalyst, safety is environmentally friendly, reduces the corrosion of system, reduces the material requirement of mud line, reduces material
Material expense.
(4) relative to secondary desiccation apparatus, for the utility model by level Four energy regenerating, energy consumption is reduced to secondary desiccation dress
1/3 set, has saved the energy, although being lower than the solid content of secondary desiccation apparatus product 90%, the carbon soil of the utility model is
Through reaching combustion requirements.
(5) the biological carbon soil that filter press comes out in the utility model is transported to transport vehicle by blending transport device.Together
When, the negative pressure that the gas of generation is generated by negative-pressure air fan is transported to malodorous gas processing system and is handled.This process has
Following characteristics: the biological carbon soil of temperature higher (50 DEG C~60 DEG C) on transmission device with negative-pressure air fan effect under cross-ventilation
Evaporation, 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 give birth to
The stabilization of object carbon soil.The foul gas and steam volatilized will not be revealed on closed transmission device, not endanger environment；Out
The biological carbon soil fugitive constituent come is few, and foul gas is few, is conducive to the transport of foul gas, reduces environmental pollution, while solid content
It further increases, increases by 1% or so.
(6) the utility model provides different foul gas collection processing system implementings.Its for high temperature and pressure foul gas A and
The different characteristics of general foul gas B, treats with a certain discrimination, separately handles.After steam-water separation, remix.The high temperature of the utility model
It is as follows that high pressure foul gas collects processing pipeline:
The normal temperature and pressure foul gas processing pipeline of the utility model includes that negative pressure collects blower, steam-water separation tower, chemistry
Reaction tower, biological respinse tower, activated carbon adsorption device, chimney and its pipeline and valve, thus have the following characteristics that
1) most pollutant is retained using the water in steam-water separation tower, is dissolved into pollutant in water, is 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.This utility model 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 guarantee reliability, before discharge, activated carbon adsorption is set.In particular, can be absorbed in short-term when accident condition
A large amount of pollutants, improve system reliability.
(7) the utility model provides cooling water system and rinses water system.Cooling water is convenient for energy regenerating, the water of equipment
Solution sludge gradually cools down.Rinse water system for device stop cleaning, it is significant, remove remaining dirt in device
Mud avoids the blocking of device, reduces the corrosion of system, extends the service life of device, and the starting for next time provides guarantee,
It is created condition for the safe operation of machine.
(8) the sludge treating system high degree of automation of the utility model, operation control is simple, and continuity is good, is convenient for work
Industry metaplasia produces, and 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, (phase that low energy consumption
For desiccation), cost performance is high.
(9) sludge treating system provided by the utility model realizes automation control by electrical and pneumatic valve, section
About human resources are run easy to operate.
Detailed description of the invention
Fig. 1 is the schematic diagram of the utility model；
Fig. 2 is sewage sludge storage and pre-heating system, sludge hot hydrolysis system and energy recycling system schematic diagram；
Fig. 3 is dehydration drying system schematic diagram；
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 embodiments of the present invention, for broken thin biological carbon
Cake；
Fig. 6 is the product according to the system production of the embodiments of the present invention: the biological carbon cake of solid content 78%.
Specific embodiment
Fig. 1 is the schematic diagram according to the sludge treating system of the utility model.It can be seen from figure 1 that sludge treating system packet
5 technique subsystems are included, are sludge hydrolytic system, energy recycling system, dehydration drying system, malodorous gas processing system respectively
With flushing water system, it 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 bottom of pond portion blender, 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 (example that steam generator device 22 or external heat source come
Such as steam power plant), enter pyrohydrolysis reactor 21 from bottom, is further heated to 180 DEG C using steam in pyrohydrolysis device 21
~230 DEG C, pressure reaches 15bar~28bar, by mud vapour Hybrid Heating, carries out pyrohydrolysis, the formation temperature after pyrohydrolysis
T1 (180 DEG C~230 DEG C), the hydrolyzing sludge of pressure P1 (15~28bar).
Energy recycling system: being to recycle the energy of sludge hydrolytic system to cool down to sludge hydrolytic system.
Hydrolyzing sludge is walked in the pipe of energy recycle device, walks cooling water outside pipe.Energy recycle device is substantially carried out heat exchange and recuperation of heat,
It is divided into level Four recycling, heat exchange 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 as heat source for low-pressure system herein
Steam generation facility.Subsequently into second 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, less than 100 degree, pressure P6=P5-0.1
Left and right.
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 exchanging heat, 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 counterflow heat exchange, 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 second level heat exchange network 33, water outlet enters back into level-one heat exchange network 31, and after exchanging heat, exit water temperature is close to T2, temperature
It is very high, the energy of heating is reduced as 22 water source into steam generator device 22.
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 recycling system.
Dehydration drying system: the 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 recycling system is come is through exporting water
Less than 100 degree, pressure about P6=P1-2 is depressurized to through mud discharging pump 40 and is less than temperature when solving the pipe outlet discharge of sludge
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 with plate and frame filter press feed pump 42 into filter-pressing device 43, 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 the utility model
Range).The utility model selects plate and frame filter press, obtains blocky mud cake.The mud cake of generation falls into following cooling and blends transmission
Device 44 accelerates the volatilization of moisture and foul gas in mud cake in the case where negative pressure and power blend effect, make mud cake it is cooling, into
One step is dry, is then delivered to storage bucket, the biological carbon soil of available solid content 65%~78%.For further processing,
Into following transport vehicle, power plant can be transported as fuel, transport to cement plant as building material, transport to farmland as fertilizer
Material etc..
Wherein, mud discharging pump 40 also acts as antihypertensive effect in addition to conveying hydrolyzing sludge by special designing, 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 is by being somebody's turn to do
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, so that the volatilization of moisture and foul gas in mud cake is accelerated, so that biological carbon
The ordorless smell of soil, meanwhile, aridity further increases.
Pyrohydrolysis, dehydration drying system material all use 304L stainless steel, with reduce corrosion and abrasion.
Malodorous gas processing system: for removing the foul gas in treatment process, including A line and B line, A line is for going
High temperature (being greater than 100 degree) high pressure (pressure the is greater than 15bar) high concentration generated during the reaction except pyrohydrolysis reactor 22
Foul gas, B line be used for remove other systems generate low temperature, low pressure, low concentration general foul gas B.
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 need to collect, processing to handle these gases.Because Tthe utility model system have high temperature and high pressure gas and
Normal temperature and pressure gas (normal temperature and pressure gas) the characteristics of for this 2 kinds of gases, is proposed and is first distinguished, then comprehensive processing route:
Wherein, general foul gas first passes through negative pressure and collects the collection of blower 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 active carbon
The safety assurance of adsorbent equipment 55, the gas for making out reach exhaust tube in " emission standard for odor pollutants " GB14554-1993
Emission limit and factory circle are in primary standard, and " atmosphere pollution comprehensive discharge standard " (GB16297-1996) when height is 15 meters
Exhaust tube height corresponding primary standard when being 15 meters.
For A line, pressure is greater than 15bar, and temperature is greater 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, pollutant in foul gas is removed.
For B line, we collect blower 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 remove pollutant in foul gas using flowing water.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 originally practical
Novel range).
Into chemical reaction tower 53 foul gas reacted with chemical agent, generate it is various it is insoluble precipitating with can
The salt of dissolution, 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, alleviate burden 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 discharged reaches " emission standard for odor pollutants "
Emission limit and factory's boundary mark are quasi- 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, to guarantee that foul gas accident is up to standard
Discharge, is adsorbed using activated carbon adsorption device 55.
Flushing water system is clean, the cleaning in order to guarantee system and device, prevents from blocking and corrode, and is rushed to system
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, blocking, it is therefore proposed that using hot water as flushing water, work as heat
It when water is inadequate, can first be rinsed using cold water, then use 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 utility model does not use strong acid as catalyst, safety, environmental protection.Reactor adds
Heat is also directly heated without using, but uses steam as heat source, although the water content of hydrolyzing sludge is increased, in hot water
Under the action of solving reactor 21, so that hydrolyzing sludge is easier to stir, mobility is more preferable, is more evenly distributed.Relative to secondary dry
Makeup is set, and the utility model is reduced to the 1/3 of secondary desiccation apparatus, has saved the energy by level Four energy regenerating, energy consumption, although
Carbon soil lower than the solid content of secondary desiccation apparatus product 90%, but the utility model has reached combustion requirements.
Fig. 2 is sewage sludge storage and pre-heating system, sludge hot hydrolysis system and energy recycling system process flow chart；Fig. 3 is
Sludge treating system according to the present utility model is described in detail referring to Fig. 2 and Fig. 3 in dehydration drying system process flow chart
The operation of each device.The operation of this system generally comprises three phases: rank is rinsed in starting warm-up phase, production phase and shutdown
Section.In order to clearly indicate the superiority, industrialized production characteristic, the efficient benefit of the spatter property of plant area and the energy of the utility model
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 starting preheating.
Firstly, steam generator device 22 is allowed 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 arrive T0 (60 DEG C~90 DEG C) after, close pyrohydrolysis reactor 21 water inlet, close operated pneumatic valve V114 with
V115。
Starting warm-up phase terminates, and can enter the production phase.
Production phase:
Therefore the utility model 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 dirt from the front end hole of sludge stirring machine 13
Mud preheating can 14, sludge preheating can 14 also have steam inlet tube P114, steam inlet tube P114 to communicate with evaporator 32, and V112 is kept to open
It opens, blender M14 and M15 are opened, and the progress of sludge and steam is secondary to be mixed, and secondary mixing is mainly to mix, heating device.Pass through
For manual inlet valve V111, V112 control outlet sludge temperature to 60 DEG C~90 DEG C, starting sewage sludge feed pump 15 opens valve V113
And V115 carries out pyrohydrolysis by P115 pipeline 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, mixes with muddy water, opens blender M21 stirring, 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 after the reaction was completed, 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 practical new according to this
The pyrohydrolysis reactor 21 of type can be such that sludge and steam is uniformly mixed, and can accurately control pyrohydrolysis temperature, this passes through
The combination of one or more features below is realized:
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 configured adjacently 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, to make by guide shell 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 under high velocity turbulent flow effect with dewatered sludge, 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 flushing pipe,
In sludge treating system operation process according to the present utility model, when steam jet generates dirty block up, throttle flow can reduce, because
This 21 temperature of pyrohydrolysis reactor is lower than setting value, at this moment needs to rinse steam admission passage and nozzle, first turns on high-pressure pump,
So that flushing overpressure is reached 30bar, then open pneumatic operated valve V215, rinse admission passage and nozzle, after the completion of flushing, closes
Valve V215；
8) 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 revolving 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, sludge heating is carried out due to using steam and sludge to be sufficiently mixed, 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, circulates effect up and down brought by guide shell in addition, so that the mixing of sludge and steam is more evenly,
The more uniform temperature of sludge, sludge hot hydrolysis temperature accurately control, and pyrohydrolysis reaction is sufficiently, safe it is not necessary that chemical reagent is added,
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 preheating pyrohydrolysis device via steam generation facility, so that connecing
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 heating, so that hydrolyzing sludge good fluidity, is evenly distributed, temperature control is accurate, and pyrohydrolysis reaction sufficiently, is not necessarily to additionization
Learn reagent, safety, environmental protection, cost-effectiveness height.
After sludge sufficiently 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 second 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 second 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, the water inlet after exchanging heat, as 31 cooling water of level-one heat exchange network.
Keep V314 full-gear, 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 outlet, which enters, steams
Send out device 32.
Keep V315 full-gear, 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-gear is kept, sludge row is opened
Pump 40-A and 40-B open state is put, enters hydrolyzing sludge storage tower 41 through pipe P322, P323, P324, P325 and P412.Hydrolysis
Sludge temperature drops to 70 DEG C~80 DEG C by 90 DEG C or so, and pressure drops to 0.2bar or so by 15bar or more by mud discharging pump,
Solid content DS is 10% or so.Open valve V415 and filter press feed pump 42, conveying hydrolyzing sludge are squeezed into filter-pressing device 43
After the completion, 50 DEG C or so of hot biological carbon soil is obtained, filtrate is discharged into filtrate processing system through pipeline P414, is handled and (do not existed
The scope of the utility model).The utility model selects plate and frame filter press, obtains blocky mud cake.The mud cake of generation falls into following cold
But transmitting device 44 accelerate the volatilization of moisture and gas in mud cake under the action of negative pressure, make mud cake cooling, are further dried,
It is then delivered to storage bucket, the biological carbon soil of available solid content 65%~78%.For further processing, it falls into following
Transport vehicle is pulled away and is recycled.After every batch of mud cake is collected, filter press 43 and transport device 44 need high pressure water to rinse, such as
Shown in Fig. 4, using high pressure washing water pump 69 come hot water, rinse filter press 43 and transport device 44, cleaning effect is good, waste water row
Enter filtrate processing system.
It further include foul gas processing unit according to the sludge treating system of the utility model embodiment, for producing
In the process carry out foul gas processing stage, the foul gas processing unit include high temperature and pressure foul gas pipeline A line and
The foul gas processing pipeline B line of normal temperature and pressure.It deals with relationship A line for high temperature and pressure foul gas, is only derived from sludge water
The pipe P214 of reactor 21 is solved, pressure is greater than 15bar, and temperature is greater than 100 degree, containing a large amount of water vapours and organic matter, therefore,
Steam-water separation tower 52 can be entered under overpressure and carry out steam-water separation, open V501, gas is emerged from water seal, through pipe
P512 enters chemical reaction tower 53.At this point, the gas temperature come out drops to 20 DEG C~50 DEG C.
For normal temperature and pressure foul gas processing pipeline B line, we collect blower 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 air inlet bodies to be discharged waste liquid on one side into industry water 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 utility model model
It encloses).
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 and chemical reaction tower by steam-water separation tower 52
53 reaction, contained stimulating component eliminate 95% or more, alleviate burden 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, passing through chimney qualified discharge through P519 pipe and blower 56.
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.
Shutting down is idle (off-stream) unit, keeps all devices closed state, closes valve.Before this, guarantee sludge in equipment
It is emptied with hydrolyzing sludge.
In shutting down rinse stage, firstly, opening pneumatic operated valve V116, sewage sludge storage pond 11 is rinsed, is then turned on sludge conveying
Pump 12 and sewage sludge feed pump 15, blender M11, M12 and M13, and flushing water enters 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, cleans 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, clean evaporator 32, second level heat exchange network 33 and three
Grade heat exchange network A 34.After the completion of cleaning, valve and equipment are closed, empties residual liquid.The level-one heat exchange of this process cleaning
Net 31, evaporator 32, second 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 B35, emptying pump 40, hydrolyzing sludge storage tower 41.
Valve V415, filter press feed pump 42 are opened, is discharged into filtrate system 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, and shutting down flushing process terminates.
The description controlled from these three operation stages, we can see that the utility model high degree of automation, operation control
System is simple, and continuity is good, is convenient for industrialized production, and sludge breakthrough point is few, and plant area's spatter property is high.
It is below the application example according to the preferred embodiment of the utility model in practice.
Example 1: sewage treatment plant, Hebei province dewatered sludge hydrothermal carbonization (HTC) and dehydration and drying project
Sludge samples sources: sewage treatment plant, Hebei province dewatered sludge, solid content DS:16% or so, volatile solid
VS (volatile solid): 70% or so.
Treatment process: it is handled by utility model device.185 DEG C~210 DEG C of reaction temperature of control, reaction pressure 16bar
~23bar, the solid content DS for obtaining hydrolyzing sludge in sewage sludge storage tank is 8.5%~9.5%.Through plate compression, cooling evaporation,
The DS of finally obtained biological carbon soil 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 limitations of the present invention, more
Feature in a embodiment can be used in combination to obtain more embodiments of the utility model, the scope of the utility model
It is defined solely by the appended claims.Various deformation form and improved form can be made to the embodiment without departing from this reality
With novel range.
Description of symbols
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 second 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 blower, 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, 63 be make-up evaporator feed pump, and 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.
Divided by subscript extra in Fig. 2/3/4, other label declarations: 31 be level-one heat exchange network；
33-1 is the 1st tubing heat exchanger of second 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*** is valve number, 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 (14)
1. a kind of sludge treating system characterized by comprising
Steam generation facility, for exporting the steam of 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, receives dirt by the way that the sludge receiving opening in the middle part of pyrohydrolysis device is arranged in
Mud, and further include blender in pyrohydrolysis device, for reaching sludge 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 cooperating 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 revolving speed of blender is adjustable, when the temperature of multiple temperature sensors is inconsistent, increases
The revolving 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 claim 1-3, which is characterized in that further include in pyrohydrolysis device
The sludge preheating can of upstream, the sludge stirring device in sludge preheating can upstream, and stirred respectively with sludge preheating can and sludge
The low-pressure steam generator connected with mixing device Fluid Sealing, low-pressure steam hair device use, which recovers energy to heat, generates third pressure
And the 4th temperature steam, thus make sludge stirring device realize sludge stirring and sludge mixed with the first of steam, make
Sludge preheating device realizes that sludge is mixed with the secondary of steam.
7. sludge treating system according to any one of claim 1-3, which is characterized in that further include in pyrohydrolysis device
The dewatering drying device that downstream is connect with pyrohydrolysis device Fluid Sealing, for the sludge after pyrohydrolysis to be carried out dehydration briquetting,
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 claim 1-3, which is characterized in that further include foul gas processing
Device, including pressure duct and normal pressure pipeline are connected to pyrohydrolysis device, other end fluid to pressure duct one end Fluid Sealing
It is sealingly connected to steam-water separation tower, 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. sludge treating system according to any one of claim 1-3, which is characterized in that further include energy regenerating dress
It sets, is used to recover energy from the sludge of the pyrohydrolysis exported by pyrohydrolysis device through pipeline.
11. sludge treating system according to claim 10, which is characterized in that energy recycle device includes being connected in series
Multistage heat exchange network, every level-one heat exchange network includes cooling water pipe, and thus every level-one, which provides, has recovering energy for different temperatures
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 recycling system at, further include pyrohydrolysis mud discharging pump, for by pyrohydrolysis
To the dewatering drying device in downstream, the emptying pump is set as making to press after emptying pump from the sludge of pipeline 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 and dehydration and drying fill
It sets connected.
14. sludge treating system according to any one of claim 1-3, which is characterized in that the sludge is that cities and towns are dirty
Water treatment plant's dewatered sludge.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108773992A (en) * | 2018-04-02 | 2018-11-09 | 苏伊士水务工程有限责任公司 | Sludge treatment system and method for treating sludge by using same |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108773992A (en) * | 2018-04-02 | 2018-11-09 | 苏伊士水务工程有限责任公司 | Sludge treatment system and method for treating sludge by using same |
| CN108773992B (en) * | 2018-04-02 | 2024-08-20 | 苏伊士环境科技(北京)有限公司 | Sludge treatment system and method for treating sludge by using same |
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Address after: 3101, 27th Floor, Building 1, Yard 38, East 3rd Ring North Road, Chaoyang District, Beijing, 100026 Patentee after: Suez Environmental Technology (Beijing) Co.,Ltd. Country or region after: China Address before: 100026 31 / F, Taikang financial building, building 1, courtyard 38, East Third Ring Road North, Chaoyang District, Beijing Patentee before: Suez Water Treatment Co,.Ltd. Country or region before: China |