CN105621845B - A kind of sludge treating system and processing method of low energy consumption - Google Patents
A kind of sludge treating system and processing method of low energy consumption Download PDFInfo
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Abstract
The present invention relates to a kind of sludge treating system of low energy consumption and processing methods to add ozone using hydrothermal oxidization principle in oxidation matrix, make the organic matter in sludge thoroughly, rapidly carry out liquid phase oxidation, reduce the reaction time, that is, reduce energy consumption.At the same time, material after being reacted by efficient heat exchanger preheats starting material, using enclosed heat exchange structure, a large amount of vapor will be taken away when not only avoiding gas direct emission, cause heat-energy losses, additionally it is possible to which the generation for reducing steam reduces the energy of the phase transformation heat loss of water, and then Energy input can be reduced, save operating cost.On the other hand, Cu-Fe-Ce catalyst or noble metal catalyst are added in sludge, reduces the activation energy of reaction, so that temperature decline, the consumption for having saved the energy needed for reaction reduce production cost.
Description
Technical field
The present invention relates to sludge treatment field, more particularly to the sludge treating system and processing method of a kind of low energy consumption.
Background technique
Since Eleventh Five-Year Plan, the sewage treatment industry in China is developed rapidly, sewage treatment capacity and processing
Rate rapid development brings the sludge yield to increase sharply.It is shown according to living to build portion's data, by the end of the end of the year in 2009, the whole nation
Urban wastewater treatment amount reaches 280 billion cubic meters, and wet mud (moisture content 80%) yield breaks through 20,000,000 tons.It is tied according to investigation
Fruit shows that sludge caused by wastewater treatment in China factory has 80% not dealt carefully with, and sludge is arbitrarily stacked and caused
Pollution highlighted with recontamination problem, and cause society concern.
Existing sludge disposal technology have it is several under it is several:
One, sludge incineration
After burning disposal, volume can reduce 85%~95%, Mass lost 70%~80%.High temperature incineration may be used also
To eliminate the disinfect pathogen and harmful substance in sludge.By can be divided mainly into two major classes: one kind is directly to use dewatered sludge
Incinerator burns；Another kind of is to burn the desiccation of dewatered sludge elder generation again.Sludge incineration requires sludge to have higher calorific value, therefore dirty
Mud is generally without digestion process.Generally when sludge does not meet hygienic requirements, levels of toxic substances is high, cannot function as agricultural avocation benefit
The combustion heat value of used time or sludge itself is high, can be with spontaneous combustion and when generating electricity using calory burning, it is contemplated that burnt using sludge
It burns.Burn institute's calorific requirement, mainly by the organic compound combustion that sludge contains, heat caused by the organic compound combustion as contained by sludge
Energy.Burning great advantage is that can rapidly and largely make reducing sludge volume, and be not required to deposit under the conditions of atrocious weather
Equipment is stored up, can satisfy the environmental requirement being increasingly stringenter and fully handles the partial sludge for being unsuitable for resource utilization.
The incineration disposal of sludge is not only a kind of method that sludge volume is effectively reduced, and designs good incinerator and is not only able to transport automatically
Row, additionally it is possible to provide extra energy and electric power, therefore almost all of developed country is expected that by incineration disposal sludge
Solve growing sludge quantity and in the past by the partial sludge of land fill disposal.But the shortcomings that sludge incineration it is also obvious that
Operating cost is high, and the sludge incineration technical operation expense run now is all at 400 yuan or more.
Two, sanitary landfills
This method of disposal is simple, easy, at low cost, and sludge does not need high dehydration again, adaptable.But sludge is filled out
Bury that there is also some problems, the espespecially formation of loading embeading percolation liquid and gas.Percolate is a kind of liquid being heavily polluted, if
Site selection of landfill or the improper meeting polluted underground water environment of operation.The gas that landfill yard generates is mainly methane, if not taking suitably
Measure can set off an explosion and burn.
Three, land use
Sludge soil is directly utilized because of small investment, low energy consumption, operating cost is low, organic moiety can be converted to soil conditioner
The advantages that ingredient, scientific and reasonable land use can reduce sludge bring negative effect.Forest land and municipal administration greening utilization because
It does not easily cause the pollution of food chain and becomes the effective means of sludge landfill characteristics.Sludge is used for soil (such as mine of serious disturbance
The soil that the needs such as soil, forest harvesting field, refuse landfill, earth's surface area of heavy damage are reclaimed) reparation and reconstruction, reduce
Potential threat of the sludge to human lives, has not only disposed sludge but also has restored ecological environment.But due to the progress of urbanization,
It is suitble to the ground of land use fewer and fewer, and sludge yield is more and more.
Four, drying sludge
Drying sludge is the processing method for carrying out deep dehydration to sludge with industrial equipment using artificial heat, although dirty
The dry direct result of mud is the decline (dehydration) of moisture percentage in sewage sludge, but compared with mechanical dehydration, application purpose is equal with effect
It is very different.
Mechanical sludge dewatering (also include sludge condensation), the purpose of application are (dirty based on the volume of Treatment of Sludge to reduce
Mud concentration and mechanical dehydration usually can make sludge volume reduce 4 times or so), but dewatered sludge cake is in addition to moisture content and relevant
Physical property, if mobility and original state sludge are variant outer, chemistry, biology etc. property do not generate change because of dehydration
Change.
Drying sludge is then due to the requirement of raising moisture evaporation intensity, and using artificial heat, operation temperature is (to sludge
For grain) 100 DEG C are typically larger than, the dry Treatment Effects to sludge are not only deep dehydration, also have the effect of heat treatment；
In addition, the product of drying sludge processing, moisture content can be controlled in 20% hereinafter, reaching the microbial activities inhibited in sludge
Level, therefore drying sludge processing can change simultaneously the physics, chemistry and biological nature of sludge.The shortcomings that drying sludge is energy
Consumption is big, operating cost is high, stink is big.
Summary of the invention
The purpose of the present invention is being directed to the problem that energy consumption is big, treatment effeciency is low in sludge wet oxidation treatment process,
It is proposed the sludge treating system and processing method of a kind of low energy consumption.
To achieve the above object, the present invention provides a kind of sludge treating system of low energy consumption, the processing system includes
Pretreatment unit, heat exchange unit, oxidation matrix unit, reactor, separative unit and catalyst put into unit, the reactor
Be connected respectively with heat exchange unit, oxidation matrix unit and separative unit, the pretreatment unit respectively with heat exchange unit, point
It is connected from unit；
The pretreatment unit include store sludge sludge storage tank, be connected with the sludge storage tank pretreatment tank,
The blender for conveying the solid pump of sludge and being arranged in the pretreatment tank,
The heat exchange unit includes the preheating heat exchanger and the reactor being connected with the pretreatment tank and reactor
The cooling heat exchanger being connected and the heat conducting oil boiler being arranged between the preheating heat exchanger and cooling heat exchanger,
The oxidation matrix unit include air compressor machine, the adsorbing tower with molecular sieve being connected with the air compressor machine, with described point
Son sieve adsorption tower and the reactor supercharger being connected and the ozone generator being connected with the supercharger,
The separative unit includes the gas-liquid separator being connected with the cooling heat exchanger and the gas-liquid separator phase
The plate and frame filter press of connection, the plate and frame filter press are connected with pretreatment tank.
Preferably, the preheating heat exchanger and cooling heat exchanger are sleeve heat exchange, and heat-conducting medium is conduction oil.
Preferably, the outer tube of described sleeve pipe coats heat preserving and insulating material.
Preferably, the reactor be tower piston flow reactor, and the inside reactor do not set hydraulic barrier or
Short hydraulic barrier is arranged in person, and the short hydraulic barrier is annular baffle of the width in 10~30cm.
Preferably, the gas-liquid separator uses vertical two-phase gas-liquid separator, and the top of the gas-liquid separator
Fog is caught using silk screen.
The present invention also provides a kind of method for sludge treatment of low energy consumption, the treating method comprises following steps:
A, will be stored in the sludge in sludge storage tank with solid pump inject pretreatment tank, pretreatment tank in separative unit
Liquid-phase reflux water mixing, and by catalyst put into unit be added catalyst, be made into moisture content for 90% material；
B, treated that aqueous 90% material makes temperature of charge rise to 120 by preheating heat exchanger for pretreatment unit
~150 DEG C, and material is sent into reactor；
C, the oxygen produced from oxidation matrix unit is passed through reactor, material and oxygen and carries out oxygen in the reactor
Change reaction, wherein the temperature in reactor is 120~150 DEG C, and pressure is 1.5~3.5MPa, and the reaction time is 20~30min；
D, after reaction, the material of high temperature and gas carry out cooling heat transferring through cooling heat exchanger, later into gas-liquid point
Carry out gas-liquid separation, gas direct emission after separation from device, material then enters plate and frame filter press, obtained after filters pressing moisture content≤
40% mud cake；
E, the liquid phase obtained after plate and frame filter press filters pressing is injected pretreatment tank as recirculation water and is recycled.
Preferably, in step C, the process of the oxidation matrix unit style high pressure oxygen and ozone are as follows: use screw
Air compressor machine is by supercharging air to 1.0~1.3MPa, by adsorbing tower with molecular sieve by oxygen enrichment to 50%~80%, then passes through increasing
Press increases the air after enrichment and the Maximum Concentration of Ozone produced from ozone generator.
Preferably, in step, the catalyst is using aluminium oxide as carrier, using Cu-Fe-Ce catalyst or noble metal
Catalyst.
It preferably, in step D, further include the raw material progress resource that the mud cake after the filters pressing is processed as to organic fertilizer
Change the step of utilizing.
Based on the above-mentioned technical proposal, the invention has the advantages that
The present invention makes the breaking-wall cell in sludge using high temperature and pressure, removes the cellular water in cell, makes subsequent
Separation of solid and liquid is relatively easy to.Hydrothermal oxidization principle is more importantly utilized, ozone is added in oxidation matrix, makes having in sludge
Machine object is thorough, rapidly carries out liquid phase oxidation, reduces the reaction time, that is, reduce energy consumption.At the same time, pass through
It is straight to not only avoid gas using enclosed heat exchange structure for material preheating starting material after efficient heat exchanger reaction
A large amount of vapor will be taken away by running in when putting, cause heat-energy losses, additionally it is possible to which the generation for reducing steam, the heat of transformation for reducing water disappear
The energy of consumption, and then Energy input can be reduced, save operating cost.On the other hand, Cu-Fe-Ce catalysis is added in sludge
Agent or noble metal catalyst reduce the activation energy of reaction, so that temperature decline needed for reaction, has saved the consumption drop of the energy
Low production cost.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the sludge treating system schematic diagram of low energy consumption
Wherein, 1~pretreatment unit；2~heat exchange unit；3~oxidation matrix unit；4~reactor；5~separative unit；
6~catalyst puts into unit；7~sludge storage tank；8~pretreatment tank；9~preheating heat exchanger；10~cooling heat exchanger；11~lead
Hot oil boiler；12~air compressor machine；13~adsorbing tower with molecular sieve；14~supercharger；15~gas-liquid separator；16~plate compression
Machine；17~ozone generator.
Specific embodiment
Below by drawings and examples, technical scheme of the present invention will be described in further detail.
Embodiment 1
The present invention provides a kind of sludge treating system of low energy consumption, the processing system includes pretreatment unit 1, heat exchange
Unit 2, oxidation matrix unit 3, reactor 4, separative unit 5 and and catalyst put into unit 6, the reactor 4 is distinguished
Be connected with heat exchange unit 2, oxidation matrix unit 3 and separative unit 5, the pretreatment unit 1 respectively with heat exchange unit 2,
Separative unit 5 and catalyst investment unit 6 are connected.
The pretreatment that the pretreatment unit 1 includes the sludge storage tank 7 of storage sludge, is connected with the sludge storage tank 7
Tank 8, the solid pump for conveying sludge and the blender being arranged in the pretreatment tank 8.
In the pretreatment unit 1, moisture content in sludge storage tank 7 is injected in 75%~85% sludge with solid pump
Tank 8 is pre-processed, is mixed in pretreatment tank 8 with the liquid-phase reflux water of separative unit 5, is made into the material of moisture content 90%.Liquid phase
Recirculated water is in acid (PH4~5), and under the action of an acid, basic broken wall can occur for sludge, so that the molten wall of a part of cell, dissociates
Moisture increases, also, since reflux coolant-temperature gage is higher, preheats primary sludge.Under the synergistic effect of this several respect, make
The mobility for obtaining mixing sludge in pretreatment unit 1 is strengthened.
At the same time, catalyst investment unit 6 also puts into the catalyst of catalytic amount into pretreatment tank 8, and is pre-processing
It is uniformly mixed under the stirring of blender in tank 8.The step makes catalyst evenly dispersed, and obtains the pre- of liquid-phase reflux water
Heat is conducive to be that catalyst reaches preferable catalytic activity.
Treated that aqueous 90% sludge makes temperature of charge rise to reaction by heat exchange unit 2 for pretreatment unit 1
Temperature (120~150 DEG C as needed).The pressure rating of 2 equipment of heat exchange unit is consistent with reactor.
The heat exchange unit 2 include the preheating heat exchanger 9 being connected with the pretreatment tank 8 and reactor 4, with it is described anti-
The cooling heat exchanger 10 for answering device 4 to be connected and the conduction oil being arranged between the preheating heat exchanger 9 and cooling heat exchanger 10
Boiler 11.
Conduction oil media for heat exchange can be used in heat exchange unit 2, and the cold and hot material of double-tube heat exchanger can also be used and directly exchange heat.Heat exchange
Device can use two schemes, and one kind is medium indirect heat exchange, and another heat exchange mode is raw material indirect heat exchange.
Media for heat exchange is such as used, heat exchanger need to design two sets, a set of preheating material, a set of cooling reacting rear material, medium
Using conduction oil.For heat exchanger in order to avoid blocking, design uses double-tube heat exchanger, and inner tube uses DN80, and outer tube uses DN100.
Outer tube coats heat preserving and insulating material, it is preferable that can be kept the temperature using asbestos.Mating heat conducting oil boiler 11, as starting heat source with
And the effect of additional heat.Since reaction is originally as exothermic reaction, entire reactor 4 maintains temperature not need heat conducting oil boiler 11
Additional thermal energy is provided.
The temperature of mounting temperature sensor heat collecting exchanger is distinguished in import, the outlet of heat exchanger.If temperature is not achieved
It is required that then opening heat conducting oil boiler 11 simultaneously, to increase the temperature of conduction oil, guarantee that reaction is normally carried out.
Raw material indirect heat exchange is such as used, heat exchanger outer tube is passed directly into the solid-liquid-gas three phase mixture of reactor discharge.Heat
Material walks inner tube, and cold material walks outer tube.
Above two heat exchange mode respectively has feature, and media for heat exchange controllability is strong, raw material directly exchange heat energy utilization rate height.?
In practical application, technical staff can comprehensively consider according to cost, efficiency, select for itself suitable heat exchange mode.
Initial reaction temperature is risen to by the temperature of charge of preheating heat exchanger 9, it is oxidable in sludge at high temperature under high pressure
With the oxygen and ozone being dissolved into water oxidation reaction occurs in reactor 4 for organic matter, releases heat.According to temperature, pressure, stop
The difference of time etc. is stayed, end reaction activity is also inconsistent.
Reactor 4 uses tower piston flow reactor, and inside does not set hydraulic barrier or is arranged compared with short shutter, inhibits as far as possible
Radial mixing.The short hydraulic barrier is annular baffle of the width in 10~30cm.Material enters from the lower section of reactor 4,
It is discharged from top.When work, reactor 4 controls the residence time of material according to flow velocity.The bottom of the reactor 4 is additionally provided with
Gas distributor, to access the oxidation matrix that oxidation matrix unit 3 is produced.
The oxidation matrix unit 3 include air compressor machine 12, be connected with the air compressor machine 12 adsorbing tower with molecular sieve 13, and
The supercharger 14 and the ozone generation being connected with the supercharger 14 that the adsorbing tower with molecular sieve 13 and reactor 4 are connected
Device 17.
The process that the oxidation matrix unit 3 produces oxidation matrix is to be adsorbed first by air compressor machine 12 and molecular sieve
For tower 13 by oxygen enrichment to 50%~80%, the air compressor machine 12 is preferably screw-rod air compressor.Then will be occurred by ozone
The ozone that device 17 is produced imports pressurization together with the oxygen for the high concentration produced by air compressor machine 12 and adsorbing tower with molecular sieve 13
Machine 13.Again by supercharger 13 by after enrichment oxygen and Maximum Concentration of Ozone increase, according to the difference of technological temperature, be adjusted to be greater than
The saturated vapor pressure of water at this temperature, maximum pressure can achieve 90kg.
Present invention employs the stronger oxidants of oxidation susceptibility, are passed through ozone by a certain percentage in the gas being passed through, mention
High oxidation efficiency does not generate foul smell so that oxidation product is more thorough.Therefore, ozone is added in oxidation matrix makes in sludge
Organic matter thoroughly, rapidly carry out liquid phase oxidation, greatly improve efficiency of sludge treatment.
In the system of the present invention, air compressor machine and supercharger each two, one in normal use, another as spare,
And share an air accumulator.
The adsorbing tower with molecular sieve 13 is using attractant (zeolite molecular sieve) to the adsorption energy of oxygen and nitrogen in air
The difference of power realizes the separation of oxygen and nitrogen, increases the concentration of oxygen, can effectively reduce the workload of air compressor machine 12 with
Energy consumption.
After oxidation processes, sludge is separated by solid-liquid separation, and Specific Cake becomes smaller when filters pressing.Under conditions of not having to addition filter aid
It may be implemented quickly to filter, reduce the operating cost and equipment investment in solid-liquid separation unit 5.Reaction temperature is higher, for COD
Deng degradation effect it is better, if temperature, to 300 DEG C or more, waste liquid can achieve the standard of direct emission.But temperature is higher,
Equipment pressure rating is higher, and operating cost also will increase.So 4 operating condition of reactor, needs to be changed according to processing requirement.
And in the present system, due to putting into unit 6 comprising catalyst, by putting into catalyst, reduce oxidation reaction
Activation energy reduces the temperature of reaction, reduces energy investment.Also, it during temperature lower hydrothermal oxidization, can generate
Low molecular carboxylic acid, for this process advan.Because the recovery efficiency of energy directly affects operating charges for hydrothermal oxidization technique
With the fouling of tube wall is a big harm for heat exchanger 4.And low molecular carboxylic acid can remove tube wall incrustation, make the effect of heat exchanger 4
Rate is stablized.
It is greater than 60000 raw material for COD, so that temperature of charge is risen 30~40 in reactor 4 Celsius
Degree, the heat loss of enough balanced reaction device 4 and pipeline heat exchanger.That is in addition addition heat is not had to.Material after reaction
And gas all passes through the heat exchange of cooling heat exchanger 10, and a large amount of vapor will be taken away when avoiding gas direct emission, cause heat
The loss of energy.Therefore the present invention uses heat-exchange system, can recycle most of thermal energy, reach energy-efficient mesh to greatest extent
's.
The separative unit 5 includes the gas-liquid separator 15 being connected with the cooler 10 and the gas-liquid separator
15 plate and frame filter press 16 being connected, the plate and frame filter press 16 are connected with pretreatment tank 8.
The gas-liquid separator 15 is mounted on the outlet of cooling heat exchanger 10, for the gas and liquid in separation system,
It is also used for gas demisting.After oxidation processes, cooling, the predominantly clean carbon dioxide of gas, material passes through gas-liquid
It, can be with direct emission in an atmosphere after separator 15.Plate and frame filter press 16 is for being separated by solid-liquid separation, using in high-pressure compressing filter cloth
Sludge reduces its moisture content.Preferably, gas-liquid separator 15 uses vertical two-phase gas-liquid separator, the gas-liquid separator 15
Top fog is caught using silk screen, the generation of a large amount of water mists can be effectively prevented.
The present invention makes the breaking-wall cell in sludge using high temperature and pressure, removes the cellular water in cell, makes subsequent
Separation of solid and liquid is relatively easy to.Hydrothermal oxidization principle is more importantly utilized, ozone is added in oxidation matrix, makes having in sludge
Machine object is thorough, rapidly carries out liquid phase oxidation, reduces the reaction time, that is, reduce energy consumption.At the same time, pass through
It is straight to not only avoid gas using enclosed heat exchange structure for material preheating starting material after efficient heat exchanger reaction
A large amount of vapor will be taken away by running in when putting, cause heat-energy losses, additionally it is possible to which the generation for reducing steam, the heat of transformation for reducing water disappear
The energy of consumption, and then Energy input can be reduced, save operating cost.On the other hand, catalyst is added in sludge, is reduced
The activation energy of reaction, so that temperature decline, the consumption for having saved the energy needed for reaction reduce production cost.
Using sludge treating system of the invention, operating cost can be reduced to 120 yuan/ton.It is significantly less than anhydration and incineration
The operating cost needed.On the other hand, the sludge handled by this system, moisture content can be reduced to 40% or less；And by
Taken up little area in equipment, it is therefore desirable to plant area also very little.
Embodiment 2
The present invention also provides a kind of method for sludge treatment of low energy consumption, the treating method comprises following steps:
A, will be stored in the sludge in sludge storage tank 7 with solid pump inject pretreatment tank 8, pretreatment tank 8 in separate
The liquid-phase reflux water of unit 5 mixes, and puts into unit 6 by catalyst and catalyst is added, and is made into the material that moisture content is 90%.
Moisture content is mixed in 75%~85% sludge with liquid-phase reflux water in sludge storage tank 7, is made into moisture content 90%
Material.Liquid phase circulation water is in acid PH4~5, and under the action of an acid, basic broken wall can occur for sludge, so that a part of cell is molten
Wall, free moisture increase, also, since reflux coolant-temperature gage is higher, preheat primary sludge.Make in the collaboration of this several respect
Under, so that the mobility of mixing sludge is strengthened in pretreatment unit 1.
Preferably, the catalyst is using aluminium oxide as carrier, using Cu-Fe-Ce catalyst or noble metal catalyst.
B, treated that aqueous 90% material rises to temperature of charge by preheating heat exchanger 9 for pretreatment unit 1
120~150 DEG C, and material is sent into reactor 4.
C, by the oxygen produced from oxidation matrix unit 3 be passed through reactor 4, material and oxygen in the reactor 4 into
Row oxidation reaction.Present invention employs the stronger oxidants of oxidation susceptibility, are passed through ozone by a certain percentage in the gas being passed through,
Oxidation efficiency is improved, so that oxidation product is more thorough, does not generate foul smell.Therefore, ozone is added in oxidation matrix makes sludge
In organic matter thoroughly, rapidly carry out liquid phase oxidation, greatly improve efficiency of sludge treatment.This method is few by increasing
The cost of amount, but makes the treatment effeciency of sludge obtain great promotion, obtains the cost performance of system entirety
Greatly promoted.
Temperature in reactor 4 is 120~150 DEG C, and pressure is 1.5~3.5MPa, and the reaction time is 20~30min.Instead
Answer temperature, pressure higher, better for the degradation effect of COD etc., if temperature is to 300 DEG C or more, waste liquid be can achieve directly
The standard of discharge.But temperature, pressure are higher, equipment pressure rating is higher, and operating cost also will increase.Increase by one in oxygen
Quantitative ozone enhances oxidation effectiveness, and the reduction residence time can be reduced about when ozone content reaches 10% or more in air
The 30min residence time.
And in the method, due to investment catalyst, the activation energy of oxidation reaction is reduced, the temperature of reaction is reduced,
So that reaction is able under the conditions of 120~150 DEG C of temperature, the organic matter in sludge also more can be fully handled.Also,
During temperature lower hydrothermal oxidization, low molecular carboxylic acid can be generated, for this process advan.Because for hydrothermal oxidization work
Skill, the recovery efficiency of energy directly affect running cost, and the fouling of tube wall is a big harm for heat exchanger 4, and low molecule carboxylic
Acid can remove tube wall incrustation, make the stabilised efficiency of heat exchanger 4.
D, after reaction, the material of high temperature and gas enter gas-liquid through the progress cooling heat transferring of cooling heat exchanger 10 later
Separator 15 carries out gas-liquid separation, the gas direct emission after separation, and material then enters plate and frame filter press 16, contained after filters pressing
The mud cake of water rate≤40%.Mud cake after the filters pressing can be processed as good organic fertilizer, to carry out resource utilization, drop
The low operation cost of system.
E, the liquid phase obtained after 16 filters pressing of plate and frame filter press is injected pretreatment tank 8 as recirculation water and is recycled.
Further, it is preferable that in step C, the process of oxidation matrix unit 3 high pressure oxygen processed and ozone are as follows: adopt
With screw-rod air compressor 12 by supercharging air to 1.0~1.3MPa, by adsorbing tower with molecular sieve 13 by oxygen enrichment to 50%~
80%, then increased the air after enrichment and the Maximum Concentration of Ozone produced from ozone generator 17 by supercharger 14.
The present invention makes the breaking-wall cell in sludge using high temperature and pressure, removes the cellular water in cell, makes subsequent
Separation of solid and liquid is relatively easy to.Hydrothermal oxidization principle is more importantly utilized, ozone is added in oxidation matrix, makes having in sludge
Machine object is thorough, rapidly carries out liquid phase oxidation, reduces the reaction time, that is, reduce energy consumption.At the same time, pass through
It is straight to not only avoid gas using enclosed heat exchange structure for material preheating starting material after efficient heat exchanger reaction
A large amount of vapor will be taken away by running in when putting, cause heat-energy losses, additionally it is possible to which the generation for reducing steam, the heat of transformation for reducing water disappear
The energy of consumption, and then Energy input can be reduced, save operating cost.On the other hand, Cu-Fe-Ce catalysis is added in sludge
Agent or noble metal catalyst reduce the activation energy of reaction, so that temperature decline needed for reaction, has saved the consumption drop of the energy
Low production cost.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, it should be understood by those ordinary skilled in the art that: still
It can modify to a specific embodiment of the invention or some technical features can be equivalently replaced；Without departing from this hair
The spirit of bright technical solution should all cover within the scope of the technical scheme claimed by the invention.
Claims (9)
1. a kind of sludge treating system of low energy consumption, it is characterised in that: the processing system includes pretreatment unit (1), heat exchange
Unit (2), oxidation matrix unit (3), reactor (4), separative unit (5) and catalyst investment unit (6), the reactor
(4) it is connected respectively with heat exchange unit (2), oxidation matrix unit (3) and separative unit (5), the pretreatment unit (1) point
It is not connected with heat exchange unit (2), separative unit (5) and catalyst investment unit (6), the reactor (4) is tower flat
Plug-flow reactor；
The pretreatment unit (1) includes the sludge storage tank (7) for storing sludge, the pre- place being connected with the sludge storage tank (7)
The blender of tank (8), the solid pump for conveying sludge and setting in pretreatment tank (8) is managed,
The heat exchange unit (2) includes the preheating heat exchanger (9) being connected with pretreatment tank (8) and reactor (4) and institute
State the cooling heat exchanger (10) and be arranged in the preheating heat exchanger (9) and cooling heat exchanger (10) that reactor (4) is connected
Between heat conducting oil boiler (11),
The adsorbing tower with molecular sieve that the oxidation matrix unit (3) includes air compressor machine (12), is connected with the air compressor machine (12)
(13), the supercharger (14) that is connected with the adsorbing tower with molecular sieve (13) and reactor (4) and with the supercharger (14)
The ozone generator (17) being connected,
The separative unit (5) includes the gas-liquid separator (15) being connected with the cooling heat exchanger (10) and the gas-liquid
The plate and frame filter press (16) that separator (15) is connected, the plate and frame filter press (16) are connected with pretreatment tank (8), the gas
Liquid/gas separator (15) uses vertical two-phase gas-liquid separator.
2. sludge treating system according to claim 1, it is characterised in that: the preheating heat exchanger (9) and cooling heat transferring
Device (10) is sleeve heat exchange, and heat-conducting medium is conduction oil.
3. sludge treating system according to claim 2, it is characterised in that: the outer tube of described sleeve pipe coats insulation material
Material.
4. sludge treating system according to claim 1, it is characterised in that: do not set baffling gear inside the reactor (4)
Plate or the short hydraulic barrier of setting, the short hydraulic barrier are annular baffle of the width in 10~30cm.
5. sludge treating system according to claim 1, it is characterised in that: the top of the gas-liquid separator (15) uses
Silk screen catches fog.
6. a kind of method for sludge treatment that the sludge treating system using as described in any one of Claims 1 to 5 carries out,
It is characterized in that:
A, the sludge that will be stored in sludge storage tank (7) injects pretreatment tank (8) with solid pump, in pretreatment tank (8) and divides
Liquid-phase reflux water mixing from unit (5), and catalyst is added by catalyst investment unit (6), being made into moisture content is 90%
Material；
B, treated that aqueous 90% material rises to temperature of charge by preheating heat exchanger (9) for pretreatment unit (1)
120~150 DEG C, and material is sent into reactor (4)；
C, the oxygen produced from oxidation matrix unit (3) is passed through reactor (4), material and oxygen in the reactor (4)
Oxidation reaction is carried out, wherein the temperature in reactor (4) is 120~150 DEG C, and pressure is 1.5~3.5MPa, reaction time 20
~30min；
D, after reaction, the material of high temperature and gas are through cooling heat exchanger (10) progress cooling heat transferring, later into gas-liquid point
Gas-liquid separation is carried out from device (15), the gas direct emission after separation, material then enters plate and frame filter press (16), obtains after filters pressing
The mud cake of moisture content≤40%；
E, the liquid phase obtained after plate and frame filter press (16) filters pressing is injected pretreatment tank (8) as recirculation water and is recycled.
7. method for sludge treatment according to claim 6, it is characterised in that: in step C, the oxidation matrix unit
(3) process of high pressure oxygen and ozone processed are as follows: using screw-rod air compressor (12) by supercharging air to 1.0~1.3MPa, pass through
Adsorbing tower with molecular sieve (13) is by oxygen enrichment to 50%~80%, then by supercharger (14) by the air after enrichment and from ozone
The Maximum Concentration of Ozone produced in generator (17) increases.
8. method for sludge treatment according to claim 6, it is characterised in that: in step, the catalyst is with aluminium oxide
For carrier, using Cu-Fe-Ce catalyst or noble metal catalyst.
9. method for sludge treatment according to claim 6, it is characterised in that: in step D, further including will be after the filters pressing
Mud cake be processed as organic fertilizer raw material carry out resource utilization the step of.
Priority Applications (1)
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| CN106216348A (en) * | 2016-06-30 | 2016-12-14 | 北京首创北科环境科技研究院有限公司 | A kind of bio-pharmaceuticals dreg catalytic oxidation treatment system and method |
| CN106904802A (en) * | 2017-03-21 | 2017-06-30 | 中国石油大学(北京) | A kind of processing method of oily sludge |
| CN110204165A (en) * | 2019-04-23 | 2019-09-06 | 浙江程润环保工程有限公司 | The anhydration system and drying method of a kind of sludge and breeding waste |
| CN110818213A (en) * | 2019-12-13 | 2020-02-21 | 无锡市张华医药设备有限公司 | Wet catalytic oxidation sludge treatment system based on pre-electrolysis and method thereof |
| CN111170604A (en) * | 2020-01-19 | 2020-05-19 | 江苏国翔环保科技有限公司 | Ozone sludge treatment equipment and using method thereof |
| CN112679064A (en) * | 2020-12-03 | 2021-04-20 | 清华大学 | Organic solid waste wet oxidation treatment system and treatment process thereof |
| CN112624547B (en) * | 2020-12-23 | 2021-08-24 | 江苏省环境科学研究院 | Sludge oxidation treatment system and method |
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| JP2000117273A (en) * | 1998-10-19 | 2000-04-25 | Osaka Gas Co Ltd | Waste water treatment |
| CN102786190A (en) * | 2012-07-06 | 2012-11-21 | 北京绿创生态科技有限公司 | Method for rapid recycling of sludge |
| CN204400793U (en) * | 2014-11-12 | 2015-06-17 | 北京精诚博桑科技有限公司 | A kind of sludge treating system of less energy-consumption |
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| CN102786190A (en) * | 2012-07-06 | 2012-11-21 | 北京绿创生态科技有限公司 | Method for rapid recycling of sludge |
| CN204400793U (en) * | 2014-11-12 | 2015-06-17 | 北京精诚博桑科技有限公司 | A kind of sludge treating system of less energy-consumption |
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