CN110451756A

CN110451756A - Batch-type anaerobic digestion device and its application method based on pyrohydrolysis and UF membrane

Info

Publication number: CN110451756A
Application number: CN201910763753.0A
Authority: CN
Inventors: 李伟; 张含; 王佳伟; 蒋勇; 文洋; 李烨; 刘垚
Original assignee: Beijing Drainage Group Co Ltd
Current assignee: Beijing Drainage Group Co Ltd
Priority date: 2019-08-19
Filing date: 2019-08-19
Publication date: 2019-11-15
Anticipated expiration: 2039-08-19
Also published as: CN110451756B

Abstract

The present invention relates to a kind of batch-type anaerobic digestion device and its application method based on pyrohydrolysis and UF membrane, including surge bunker, pulp tank, pyrohydrolysis reactor tank, flash tank, dilute heat exchange unit, anaerobic sequencing batch reactor tank, cross-flow filtration membrane module, dehydration device, steam boiler, it makes full use of the good separation of solid and liquid characteristic of pyrohydrolysis sludge, devise the anaerobic digestion reaction vessel of applicable sequencing batch operation, and have chosen suitable membrane material, construct the external independent cross-flow filtration membrane module of digestion reactor, enhance the separation of solid and liquid performance of digestion discharging, digestion discharging is set to become clear filtrate from solidliquid mixture, realize efficiently separating for pyrohydrolysis anaerobic sludge digestion hydraulic detention time and solid retention time, digestion residence time and the transforming degree of solid organic matters greatly improved, to reduce digested sludge Deep dehydration treating capacity, and then evaded Assistant to digestion filtrate basicity consume.

Description

Batch-type anaerobic digestion device and its application method based on pyrohydrolysis and UF membrane

Technical field

The present invention relates to technical field of sludge treatment more particularly to a kind of batch-type anaerobism based on pyrohydrolysis and UF membrane Slaking apparatus and its application method.

Background technique

Advanced anaerobic digestion techniques are to combine pyrohydrolysis technology to form on the basis of conventional anaerobic digestion technology.Sludge warp After crossing the pyrohydrolysis processing of high temperature and pressure, the wadding body of sludge disintegrates in succession, clasmatosis, and partial size reduces, and viscosity reduces, so that dirty The mobility of mud obviously improves, and solid-liquid separation effect significantly improves.Pyrohydrolysis treated sludge carries out anaerobic fermentation, factor of created gase It is significantly increased, mud decrement rate reaches 70%, and sludge is also greatly improved as the quality of resource utilization product.

Even to this day, the commercialization of advanced anaerobic digestion techniques is promoted 20 years existing.Currently, about 75 seat heights in the world Grade anaerobic digestion engineering, wherein 39 commencements of commercial operation, Other Engineering are in different stages of design and construction.Pass through every year Or the sludge dry substance mixture that will be handled by advanced anaerobic digestion techniques is about 1,650,000 tons.

Pyrohydrolysis pretreatment significantly improves the physicochemical property of sludge, so that the load of anaerobic digestion is promoted, instead Device is answered to obtain effective volume reduction.But what is used in current advanced anaerobic System is still traditional digestion process, is existed The shortcomings that be mainly manifested in: (1) organic loading is still relatively low；(2) residence time or relatively long (3) reactor volume be still So larger, traditional digestion process does not make full use of the good separation of solid and liquid performance of pyrohydrolysis sludge.

The present invention is based under the research background and proposes, it is necessary to for the characteristic of pyrohydrolysis sludge, carry out anaerobism The innovation of digestion techniques technique, it is intended to realize the further volume reduction of reactor, conversion rate of organic matter further increases, and sludge subtracts The further promotion of quantification effect.

Summary of the invention

It is an object of the invention to: overcome the middle-and-high-ranking anaerobic System above shortcomings of the prior art, provides one Batch-type anaerobic digestion device and its application method of the kind based on pyrohydrolysis and UF membrane, make full use of pyrohydrolysis sludge good Separation of solid and liquid characteristic, devise the anaerobic digestion reaction vessel of applicable sequencing batch operation, and have chosen suitable membrane material, structure The external independent cross-flow filtration membrane module of digestion reactor has been built, the separation of solid and liquid performance of digestion discharging has been enhanced, makes to digest out Material becomes clear filtrate from solidliquid mixture, when realizing pyrohydrolysis anaerobic sludge digestion hydraulic detention time and solid retention Between efficiently separate, digestion residence time and the transforming degree of solid organic matters greatly improved, to reduce digested sludge Deep dehydration treating capacity, and then evaded Assistant and the basicity of digestion filtrate is consumed.

In order to achieve the above object, the present invention adopts the following technical scheme that realization:

A kind of batch-type anaerobic digestion device based on pyrohydrolysis and UF membrane, which includes sludge buffering chamber, pulp Tank, pyrohydrolysis reactor tank, flash tank, anaerobic sequencing batch reactor tank, cross-flow filtration membrane module, membrane module produce water diaphragm pump, digestion Supernatant recycles diaphragm pump, mineralising sludge dewatering system, biogas cabinet, anaerobic digestion into mud screw pump, the heat exchange of pyrohydrolysis sludge System, methane boiler, pyrohydrolysis are into mud screw pump, pulp into mud plunger pump, central control system；Wherein, sludge buffering chamber passes through pulp Into the pre-dehydration sludge import of mud plunger pump connection pulp tank upper side；The pulp tank top is equipped with anti-with anaerobic sequencing batch Tank connected pyrohydrolysis process gas is answered to export, bottom sides set pyrohydrolysis process gas import, the pyrohydrolysis process gas import point It is not connect with pyrohydrolysis reactor tank and flash tank；The pulp pot bottom also sets pulp sludge outlet, and the pulp sludge outlet is logical Overheat is hydrolyzed into mud snail bar pump group to be connect with pyrohydrolysis reactor tank, and the pyrohydrolysis reactor tank is connected with flash tank；The heat Hydrolysis pot bottom is equipped with the saturated vapor import connecting with methane boiler, the biogas import of the methane boiler and biogas cabinet Methane outlet connection；The biogas cabinet is equipped with the biogas import connecting with anaerobic sequencing batch reactor tank top-side methane outlet； The flash tank bottom is equipped with the flash distillation sludge outlet connecting with pyrohydrolysis sludge heat-exchange system, and pyrohydrolysis sludge heat-exchange system is set There is heat-exchange system pyrohydrolysis sludge outlet, the heat-exchange system pyrohydrolysis sludge outlet and anaerobic digestion are into mud screw pump into mud snail Bar pumps pyrohydrolysis sludge import connection；The anaerobic digestion is equipped with into mud screw pump into mud screw pump pyrohydrolysis sludge outlet, should It is connect into mud screw pump pyrohydrolysis sludge outlet with the reactor tank pyrohydrolysis sludge import of anaerobic sequencing batch reactor tank bottom sides； Anaerobic sequencing batch reactor tank side is equipped with digested sludge or purified liquor outlet, the digested sludge or the purified liquor outlet of different height It is connect respectively with cross-flow filtration membrane module and digestion supernatant circulation diaphragm pump group；The anaerobic sequencing batch reaction pot bottom is equipped with The mineralising sludge outlet being connect with mineralising sludge dewatering system；The bottom of the mineralising sludge dewatering system is additionally provided with dehydration filtrate Outlet；The outlet of the digestion supernatant circulation diaphragm pump is connect with the supernatant import of the membrane tube body of cross-flow filtration membrane module； The import that the membrane module produces water diaphragm pump goes out water out with the film of cross-flow filtration membrane module bottom and connect, and the membrane module produces water Diaphragm pump is additionally provided with film filtrate outlet；The central control system respectively with sludge buffering chamber, pulp tank, pyrohydrolysis reactor tank, Flash tank, anaerobic sequencing batch reactor tank, cross-flow filtration membrane module, membrane module produce water diaphragm pump, digestion supernatant recycles diaphragm pump, Mineralising sludge dewatering system, biogas cabinet, anaerobic digestion are into mud screw pump, pyrohydrolysis sludge heat-exchange system, methane boiler, pyrohydrolysis It controls and connects into mud plunger pump into mud screw pump, pulp.

As advanced optimizing for above scheme, the sludge buffering chamber is that the carbon steel material of cone bucket type structure is column sealed Tank body；The pulp tank, flash tank, anaerobic sequencing batch reactor tank are cylindrical stainless steel atmospheric pressure sealed tank body；The hot water Solving reactor tank is cylindrical stainless steel pressure sealed shell of tank, and the design pressure of the cylinder stainless steel sealed shell of tank is 1.2MPa- 1.6MPa；The cross-flow filtration membrane module includes membrane tube body and built-in film wire, and membrane tube body is used to support film wire, and is anaerobic Supernatant provides elongated circulation canal in formula reactor tank；The membrane module produces water diaphragm pump, digestion supernatant recycles diaphragm pump It is electric diaphragm pump；The pyrohydrolysis sludge heat-exchange system is double pipe heat exchanger, and inner tube is pyrohydrolysis sludge channel, outer tube For cooling-water duct.

As advanced optimizing for above scheme, the central control system includes controller, the first temperature sensor, the second temperature Spend sensor, third temperature sensor, the 4th temperature sensor；First temperature sensor, second temperature sensor, third Temperature sensor, the 4th temperature sensor are connect with controller data signal；First temperature sensor and second temperature Sensor is respectively arranged at pyrohydrolysis reactor tank, flash tank and the tank connected high temperature steam pipe road of pulp, is used for real-time monitoring Pyrohydrolysis reactor tank, flash tank high-temperature steam temperature signal, and the temperature signal of monitoring is sent to controller；Described Three-temperature sensor is set in dilution heat exchange unit, dirty to the pyrohydrolysis in flash tank for real-time monitoring dilution heat exchange unit The sludge temperature signal that mud is diluted and exchanges heat, and the sludge temperature signal of monitoring is sent to controller；4th temperature Degree sensor is set to the temperature signal in anaerobic sequencing batch reactor tank for the reaction of real-time monitoring anaerobic fermentation, and by monitoring Signal is sent to controller；The real time temperature signal received is stored in memory module by controller after data conversion, and It is compared with corresponding preset threshold, and comparison result is stored in memory module.

As advanced optimizing for above scheme, be provided on the combustible gas gas outlet of the anaerobic sequencing batch reactor tank with Controller data signal connection combustible gas concentration sensor, flow sensor, for real-time monitoring combustible gas gas outlet can Gas concentration signal and combustible gas flow signal, and the signal of monitoring is sent to controller；On the combustible gas gas outlet also It is provided with flow control valve；The controller is connect with Flux Valve Control；The controller is sensed according to flammable gas concentration The real-time monitoring signal that device and flow sensor are sent, is stored in the memory module after data conversion, and with it is corresponding Preset threshold is compared, and comparison result is stored in memory module, controls flow control valve according to comparison result Regulated quantity.

As advanced optimizing for above scheme, blender, the stirring are provided in the anaerobic sequencing batch reactor tank Device is connected with controller；The central control system further includes the timer being connected with controller.

As advanced optimizing for above scheme, discharge baffle, the discharge are provided on the mineralising sludge outlet The pressure sensor being connected with controller is provided on baffle, the mineralising sludge pressure letter for real-time monitoring discharge baffle Number, and the pressure signal of real-time monitoring is sent to controller；The real-time pressure monitoring signals that controller will receive, through data It is stored in after conversion in the memory module, and is compared with corresponding preset threshold, and comparison result is stored in It stores up in module, according to the result of the comparison control discharge baffle automatic open close.

As advanced optimizing for above scheme, the central control system includes controller, is arranged in sludge buffering chamber First liquid level sensor, the second liquid level sensor being arranged in pulp tank and first gas pressure sensor, setting are flashing Third liquid level sensor and second gas pressure sensor in tank, the 4th liquid level being arranged in anaerobic sequencing batch reactor tank pass Sensor and third gas pressure sensor, the Automatic Dosing control unit being arranged in cross-flow filtration membrane module and automatic washing are single Member, the 5th liquid level sensor and the 4th gas pressure sensor being arranged in biogas cabinet；First liquid level sensor, second Liquid level sensor and first gas pressure sensor, third liquid level sensor and second gas pressure sensor, the 4th liquid level pass Sensor and third gas pressure sensor, the 5th liquid level sensor and the 4th gas pressure sensor with controller data signal Connection, for the liquid level and gas pressure signal at real-time detection position to be installed, and the liquid level and gas pressure signal that will test It is sent to controller；The real-time level received and gas pressure signal are stored in controller by controller after data conversion In storage unit；The controller is also connected with Automatic Dosing control unit and automatic washing unit control.

The application method of the above-mentioned batch-type anaerobic digestion device based on pyrohydrolysis and UF membrane of the present invention includes following step It is rapid:

1) sludge of sewage treatment plant is pumped into sludge caching feed bin, really after pre-dehydration to moisture content is 80-90% The manually-operated gate for protecting bin bottom is in the open state, when the sludge liquid level in pulp tank is lower than into mud liquid level, central control system Instruction is issued, pulp is into mud plunger pump startup, by the pre-dehydration sludge pumping in sludge buffering chamber into pulp tank, when dirty in tank When mud liquid level is higher than liquid level is terminated into mud, central control system issues instruction, and pulp stops into mud plunger pump；

2) be located at the pre-dehydration mud cake in pulp tank absorb the high-temperature steam discharged from pyrohydrolysis reactor tank and flash tank and Process gas, to be warmed and dilute；

3) when the mode of operation of pyrohydrolysis reactor tank is into mud, it is ensured that the manually-operated gate of pulp pot bottom is in opening state State, central control system issue instruction, and the operated pneumatic valve of pulp pot bottom is opened, and pyrohydrolysis, will be in pulp tank into mud snail bar pump startup Pulp sludge pumping into pyrohydrolysis reactor tank, when in tank liquid level be higher than terminate liquid level into mud when, central control system issues instruction, Pyrohydrolysis stops into mud screw pump, and the operated pneumatic valve of pulp pot bottom is closed；The mode of operation of pyrohydrolysis reactor tank is converted to liter Temperature, it is ensured that the manually-operated gate that pyrohydrolysis reacts pot bottom is in the open state, and central control system issues instruction, pyrohydrolysis reactor tank bottom The operated pneumatic valve in portion is opened, and methane boiler inputs saturated vapor to pyrohydrolysis reactor tank, and pressure is generally in 1.2MPa-1.6MPa model Interior selection is enclosed, when the pressure in pyrohydrolysis reactor tank reaches setting value, generally 0.6MPa-1.0MPa, corresponding temperature 160 DEG C -180 DEG C, central control system issues instruction, and the operated pneumatic valve that pyrohydrolysis reacts pot bottom is closed, and methane boiler stops to pyrohydrolysis Reactor tank inputs saturated vapor；The mode of operation of pyrohydrolysis reactor tank is converted to heat preservation, and duration certain time, generally exists It is set within the scope of 30min-60min, the mode of operation of pyrohydrolysis reactor tank is converted to pressure release, it is ensured that pulp pot bottom side The manually-operated gate of process gas import is in the open state, and central control system issues instruction, process gas outlet at the top of pyrohydrolysis reactor tank Operated pneumatic valve open, the high-temperature steam and process gas of pyrohydrolysis reactor tank inner upper end are discharged to pulp tank, when pyrohydrolysis is anti- It answers the pressure reduction of tank to setting value, is generally set within the scope of 0.2MPa-0.5MPa, central control system issues instruction, pyrohydrolysis The operated pneumatic valve of process gas outlet is closed at the top of reactor tank；The mode of operation of pyrohydrolysis reactor tank is converted to spoil disposal, it is ensured that hot water The manually-operated gate of the pyrohydrolysis sludge flash distillation outlet of solution reaction pot bottom is in the open state, it is ensured that pulp pot bottom side technique The manually-operated gate of gas import is in the open state, and central control system issues instruction, and the pyrohydrolysis sludge that pyrohydrolysis reacts pot bottom dodges The operated pneumatic valve for steaming mouth is opened, and the operated pneumatic valve of flash drum overhead process gas outlet is opened, the hot water in pyrohydrolysis reactor tank It solves sludge and enters flash tank under pressure inside the tank effect, after the pressure reduction 0.01MPa of pyrohydrolysis reactor tank, central control system hair It instructs out, the operated pneumatic valve that pyrohydrolysis reacts the pyrohydrolysis sludge flash distillation outlet of pot bottom is closed, and flash drum overhead process gas goes out The operated pneumatic valve of mouth is closed；The mode of operation of pyrohydrolysis reactor tank is converted into mud, into next operation circulation；

4) ensure the manually-operated gate of flash tank bottom, the pyrohydrolysis sludge import of anaerobic sequencing batch reactor tank bottom sides Manually-operated gate, anaerobic digestion into mud screw pump pyrohydrolysis sludge import manually-operated gate and pyrohydrolysis sludge heat-exchange system it is cold But the manually-operated gate at water source is in the open state, when the mode of operation of anaerobic sequencing batch reactor tank is input and output material, central control system Issue instruction, the pyrohydrolysis sludge import of the operated pneumatic valve and anaerobic sequencing batch reactor tank bottom sides of flash tank bottom it is pneumatic Valve opening, into mud snail bar pump startup, the pyrohydrolysis sludge in flash tank is cold by pyrohydrolysis sludge heat-exchange system for anaerobic digestion But it to set temperature, is generally selected within the scope of 40 DEG C -60 DEG C, is then anaerobically digested into mud screw pump and is pumped into anaerobism sequence Batch reactor tank；After inputiing mud volume reaches setting value, central control system issues instruction, and anaerobic digestion stops into mud screw pump, flash distillation The operated pneumatic valve of the pyrohydrolysis sludge import of the operated pneumatic valve and anaerobic sequencing batch reactor tank bottom sides of pot bottom is closed；

5) process timing sequence of anaerobic sequencing batch reactor tank is that " stirring stopping-sludge settling-synchronization input and output material-stirring is opened It is dynamic ", the mineralising sludge of set amount can be discharged in each hydraulic detention time of reactor tank from the mineralising sludge outlet of bottom；When anaerobism disappears Change the time that reaction reaches setting, the stirring system of anaerobic sequencing batch reactor tank is out of service, the behaviour of anaerobic sequencing batch reactor tank Sedimentation is converted to as state, after the sedimentation time reaching setting value, the mode of operation of anaerobic sequencing batch reactor tank is converted to disengaging Material, feed operation are as mentioned before；When discharging, it should be ensured that manual between anaerobic sequencing batch reactor tank and cross-flow filtration membrane module Valve is in the open state, it should be ensured that the manually-operated gate between anaerobic sequencing batch reactor tank and digestion supernatant circulation diaphragm pump group It is in the open state, it should be ensured that the film of cross-flow filtration membrane module goes out the manually-operated gate between water out and membrane module production water diaphragm pump It is in the open state, it should be ensured that the hand-operated valve between the membrane tube body and digestion supernatant circulation diaphragm pump group of cross-flow filtration membrane module Door is in the open state, and central control system issues instruction, while anaerobic digestion is into mud snail bar pump startup, successively in starting digestion Clear liquid recycles diaphragm pump and membrane module produces water diaphragm pump, and after water yield reaches setting value, central control system issues instruction, successively closes It closes membrane module and produces water diaphragm pump and digestion supernatant circulation diaphragm pump；The filtered fluid of generation enters subsequent process unit；

6) biogas that anaerobic digestion process generates enters natural pond by the methane outlet of anaerobic sequencing batch reactor tank top-side Gas holder, it should be ensured that the manually-operated gate of the methane outlet of anaerobic sequencing batch reactor tank top-side is in the open state, biogas output It is measured by online flowmeter, signal is sent to central control system, can check real-time traffic and cumulative production；Biogas in biogas cabinet Enter the combustion chambers burn heat release of methane boiler according to the mode of operation of pyrohydrolysis reactor tank and methane boiler, it should be ensured that biogas cabinet Manually-operated gate between methane boiler is in the open state；

7) ensure that the manually-operated gate of anaerobic sequencing batch reaction pot bottom is in the open state, when anaerobic digestion process continues one After a hydraulic detention time, central control system issues instruction, and the operated pneumatic valve that anaerobic sequencing batch reacts pot bottom is opened, mineralising sludge The mineralising sludge that anaerobic sequencing batch reactor tank is discharged in dewatering system starting is dehydrated, when the discharge of anaerobic sequencing batch reactor tank After mineralising sludge reaches set amount, central control system issues instruction, and the operated pneumatic valve that anaerobic sequencing batch reacts pot bottom is closed, mineralising Sludge dewatering system stops；The filtrate and filter cake that mineralising sludge dewatering system generates enter subsequent process unit.

Using the beneficial of the batch-type anaerobic digestion device of the invention based on pyrohydrolysis and UF membrane and its application method Effect is mainly manifested in: it makes full use of the substance solute effect of pyrohydrolysis sludge and is separated by solid-liquid separation performance, it is anti-with anaerobic sequencing batch Tank (ASBR) is answered to carry out the anaerobic digestion of pyrohydrolysis sludge, so that hydraulic detention time (HRT) and solid retention time (SRT) Separation, wherein residence time of the sewage sludge solid organic matter in reactor greatly extends, while when liquid phase stops in reactor Between shorten dramatically, to realize the conversion at a slow speed of the rapid conversion and insoluble organic matter of soluble organic.Pass through external independence Cross-flow filtration membrane module, strengthen and be separated by solid-liquid separation, so that digestion discharging is become clear filtrate from solidliquid mixture, it is dirty to reduce digestion The deep dehydration treating capacity of mud is evaded Assistant and is consumed to the basicity of digestion filtrate.

Detailed description of the invention

Attached drawing 1 is that the present invention is based on the batch-type anaerobic digestion device structure schematic diagrams of pyrohydrolysis and UF membrane.

Specific embodiment

With reference to the accompanying drawing 1 pair the present invention is based on the batch-type anaerobic digestion devices and its user of pyrohydrolysis and UF membrane Method is described in detail.

A kind of batch-type anaerobic digestion device based on pyrohydrolysis and UF membrane, which includes sludge buffering chamber 1, pulp Tank 2, pyrohydrolysis reactor tank 3, flash tank 4, anaerobic sequencing batch reactor tank 5, cross-flow filtration membrane module 6, membrane module produce water diaphragm pump 7, digestion supernatant circulation diaphragm pump 8, mineralising sludge dewatering system 9, biogas cabinet 10, anaerobic digestion are into mud screw pump 11, hot water Sludge heat-exchange system 12, methane boiler 13, pyrohydrolysis are solved into mud screw pump 14, pulp into mud plunger pump 15, central control system 16；Its In, sludge buffering chamber connects the pre-dehydration sludge import of pulp tank upper side by pulp into mud plunger pump；The pulp tank Top, which is equipped with, reacts tank connected pyrohydrolysis process gas outlet with anaerobic sequencing batch, and bottom sides set pyrohydrolysis process gas import, The pyrohydrolysis process gas import is connect with pyrohydrolysis reactor tank and flash tank respectively；The pulp pot bottom also sets pulp sludge Outlet, the pulp sludge outlet are connect into mud snail bar pump group with pyrohydrolysis reactor tank by pyrohydrolysis, the pyrohydrolysis reactor tank It is connected with flash tank；The pyrohydrolysis reaction pot bottom is equipped with the saturated vapor import connecting with methane boiler, the biogas The biogas import of boiler is connect with biogas cabinet methane outlet；The biogas cabinet is equipped with and anaerobic sequencing batch reactor tank top-side natural pond The biogas import of gas outlet connection；The flash tank bottom is equipped with the flash distillation sludge connecting with pyrohydrolysis sludge heat-exchange system and goes out Mouthful, pyrohydrolysis sludge heat-exchange system be equipped with heat-exchange system pyrohydrolysis sludge outlet, the heat-exchange system pyrohydrolysis sludge outlet with detest Oxygen digests connecting into mud screw pump pyrohydrolysis sludge import into mud screw pump；The anaerobic digestion is equipped with into mud screw pump into mud Screw pump pyrohydrolysis sludge outlet, should be into the anti-of mud screw pump pyrohydrolysis sludge outlet and anaerobic sequencing batch reactor tank bottom sides Tank pyrohydrolysis sludge import is answered to connect；Anaerobic sequencing batch reactor tank side is equipped with the digested sludge of different height or clear liquid goes out Mouthful, the digested sludge or purified liquor outlet are connect with cross-flow filtration membrane module and digestion supernatant circulation diaphragm pump group respectively；It is described Anaerobic sequencing batch reaction pot bottom is equipped with the mineralising sludge outlet connecting with mineralising sludge dewatering system；The mineralising sludge dewatering The bottom of system is additionally provided with dehydration filtrate outlet；The outlet of the digestion supernatant circulation diaphragm pump and cross-flow filtration membrane module The supernatant import of membrane tube body connects；The membrane module produces the import of water diaphragm pump and the film of cross-flow filtration membrane module bottom is discharged Outlet connection, the membrane module produce water diaphragm pump and are additionally provided with film filtrate outlet；The central control system is cached with sludge respectively Storehouse, pulp tank, pyrohydrolysis reactor tank, flash tank, anaerobic sequencing batch reactor tank, cross-flow filtration membrane module, membrane module produce water diaphragm Pump, digestion supernatant circulation diaphragm pump, mineralising sludge dewatering system, biogas cabinet, anaerobic digestion are into mud screw pump, pyrohydrolysis sludge Heat-exchange system, methane boiler, pyrohydrolysis are controlled into mud plunger pump and are connected into mud screw pump, pulp.

The structure of the main component of the above-mentioned batch-type anaerobic digestion device of the present invention is as follows:

1, sludge buffering chamber: the column sealed tank body of carbon steel material of cone bucket type structure, tank volume and wall thickness are according to hot water Treating capacity is solved to calculate.Pre-dehydration sludge is entered in tank by silo roof interface, and sludge cache-time is usually no more than 24 hours.In tank Sludge level condition is sent to central control system by liquid level sensor.Tank base sets pre-dehydration sludge outlet, connection pulp into Mud plunger pump group 15, controls connection situation by manually-operated gate.

2, pulp tank: cylindrical stainless steel sealed shell of tank, non-pressure vessel, tank volume and wall thickness are according to pyrohydrolysis treating capacity It calculates.Upper side sets pre-dehydration sludge import, connect with pulp into mud plunger pump group 15, if operated pneumatic valve and hand-operated valve gate Connection situation processed.Pulp tank top sets the outlet of pyrohydrolysis process gas, connect with anaerobic sequencing batch reactor tank 5, passes through operated pneumatic valve Connection situation is controlled with manually-operated gate.Pulp pot bottom side sets pyrohydrolysis process gas import, with pyrohydrolysis reactor tank 3 and flash distillation Tank 4 connects, and controls connection situation by operated pneumatic valve and manually-operated gate.Pulp pot bottom sets pulp sludge outlet, with pyrohydrolysis It is connected into mud snail bar pump group 14, connection situation is controlled by operated pneumatic valve and manually-operated gate.The gentle phase space of sludge liquid level in tank Pressure condition is sent to central control system by liquid level sensor and pressure sensor.

3, pyrohydrolysis reactor tank: cylindrical stainless steel sealed shell of tank, pressure vessel, design pressure are generally 1.2MPa- 1.6MPa, tank volume and wall thickness are calculated according to pyrohydrolysis treating capacity and design pressure.Upper side sets pulp sludge import, with Pyrohydrolysis is connected into mud snail bar pump group 14, if operated pneumatic valve and manually-operated gate control connection situation.It is set at the top of pyrohydrolysis reactor tank The outlet of pyrohydrolysis process gas is connect with pulp tank 2, controls connection situation by operated pneumatic valve and manually-operated gate.Pyrohydrolysis reactor tank Bottom sets pyrohydrolysis sludge flash distillation outlet and connect with flash tank 4, controls connection situation by operated pneumatic valve and manually-operated gate.Hot water Solution reaction pot bottom sets saturated vapor import, connect with methane boiler 13, is connected to feelings with manually-operated gate control by operated pneumatic valve Condition.The gentle phase space pressure condition of sludge liquid level is sent to central control system by liquid level sensor and pressure sensor in tank.

4, flash tank: cylindrical stainless steel sealed shell of tank, non-pressure vessel, tank volume and wall thickness are according to pyrohydrolysis treating capacity It calculates.Upper side sets pyrohydrolysis sludge import, connect with pyrohydrolysis reactor tank 3, if operated pneumatic valve and manually-operated gate control connect Understanding and considerate condition.Flash drum overhead sets the outlet of pyrohydrolysis process gas and connect with pulp tank 2, is connected by operated pneumatic valve and manually-operated gate control Understanding and considerate condition.Flash tank bottom sets flash distillation sludge outlet, connect with pyrohydrolysis sludge heat-exchange system 12, if operated pneumatic valve and hand-operated valve Door control connection situation.The gentle phase space pressure condition of sludge liquid level is sent to by liquid level sensor and pressure sensor in tank Central control system.

5, anaerobic sequencing batch reactor tank: cylindrical stainless steel sealed shell of tank, non-pressure vessel, if stirring system, tank volume It is calculated with wall thickness according to pyrohydrolysis treating capacity.Upper side sets pyrohydrolysis process gas import, connect with pulp tank 2, by pneumatic Valve and manually-operated gate control connection situation, and process gas is passed through anaerobic sequencing batch reactor tank liquid level or less about 1m.Anaerobic sequencing batch Reactor tank top-side sets methane outlet, connect with biogas cabinet 10, controls connection situation by manually-operated gate, biogas output passes through Online flowmeter metering, signal are sent to central control system, can check real-time traffic and cumulative production.Anaerobic sequencing batch reactor tank side Face is equipped with digested sludge or the purified liquor outlet of different height, recycles diaphragm pump group 8 with cross-flow filtration membrane module 6 and digestion supernatant Connection, controls connection situation by manually-operated gate.Anaerobic sequencing batch reaction pot bottom sets mineralising sludge outlet, de- with mineralising sludge Water system 9 connects, and controls connection situation by operated pneumatic valve and manually-operated gate.Anaerobic sequencing batch reactor tank bottom sides set hot water Sludge import is solved, is connect with anaerobic digestion into mud snail bar pump group 11, connection situation is controlled by operated pneumatic valve and manually-operated gate.Tank The interior gentle phase space pressure condition of sludge liquid level is sent to central control system by liquid level sensor and pressure sensor.Anaerobic The process timing sequence of formula reactor tank is " stirring stopping-sludge settling-synchronization input and output material-stirring starting ", and each waterpower of reactor tank is stopped Stay the time that the mineralising sludge of set amount can be discharged from the mineralising sludge outlet of bottom.The revolving speed of stirring system can be in the reasonable scope Carry out free setting.

6, cross-flow filtration membrane module: being made of membrane tube body and built-in film wire, and membrane tube body is used to support film wire, and is anaerobism sequence Supernatant provides elongated circulation canal in batch reactor tank 5, the supernatant of high-speed circulating can be used for scrubbing film wire surface to Fouling membrane is prevented, for being further separated by solid-liquid separation to supernatant, the suspended sediment concentration control of film water outlet exists film wire 100mg/l or less.The tube wall top of cross-flow filtration membrane module 6 is equipped with supernatant outlet, with 5 side of anaerobic sequencing batch reactor tank Thus outlet connection, supernatant are back in anaerobic sequencing batch reactor tank 5, control connection situation by manually-operated gate.Cross-flow The tube wall lower part of filter membrane component be equipped with supernatant import, with digestion supernatant circulation diaphragm pump 8 outlet connect, supernatant thus into The membrane tube body for entering 6 cross-flow filtration membrane modules, controls connection situation by manually-operated gate.The bottom of cross-flow filtration membrane module is equipped with film Water out out produces water diaphragm pump 7 with membrane module and connect, controls connection situation by manually-operated gate.Membrane module can control system in The setting of system carries out medicine automatically and washes and wash.

7, membrane module produces water diaphragm pump: choosing the electric diaphragm pump of the stainless steel material of wear resistant corrosion resistant, uninterrupted root It is selected according to water yield.Import goes out water out with the film of 6 bottom of cross-flow filtration membrane module and connect, and controls connection feelings by manually-operated gate Condition.The outlet that membrane module produces water diaphragm pump is connect with subsequent process unit, controls connection situation by manually-operated gate.

8, digestion supernatant recycles diaphragm pump: the electric diaphragm pump of the stainless steel material of wear resistant corrosion resistant, uninterrupted root It is selected according to circular flow.Import is connect with the outlet of 5 side of anaerobic sequencing batch reactor tank, controls connection feelings by manually-operated gate Condition.Outlet is connect with the supernatant import of the membrane tube body of cross-flow filtration membrane module 6, controls connection situation by manually-operated gate.

9, mineralising sludge dewatering system: the system is made of a certain number of diaphragm plates, and mineralising sludge is pumped to often first Cavity between two pieces of diaphragm plates makes its expansion to make between two pieces of diaphragm plates then toward squeeze water is pumped into inside diaphragm plate Cavity volume become smaller, moisture enters filtrate channel through filter cloth, generates filtrate, therefore mineralising sludge is dehydrated and forms filter cake.Mine Change sludge dewatering system to connect equipped with the import of mineralising sludge with the mineralising sludge outlet of 5 bottom of anaerobic sequencing batch reactor tank, pass through Operated pneumatic valve and manually-operated gate control connection situation.Mineralising sludge dewatering system is exported equipped with dehydration filtrate, with subsequent technique list Member connection, controls connection situation by manually-operated gate.Mineralising sludge dewatering system is exported equipped with dewatered cake, with subsequent technique list Member connection, passes through helical feed.

10, biogas cabinet: external form is 3/4 sphere, is made of special processed polyesters material, has uvioresistant and various micro- lifes The ability of object, high fire-protection are made of outer membrane, inner membrance and auxiliary device, and for external mold as skeleton, biogas enters inner membrance, interior outer membrane Biogas pressure is adjusted by air compressor before.Biogas cabinet is equipped with biogas import, with 5 top-side of anaerobic sequencing batch reactor tank Methane outlet connection, connection situation is controlled by manually-operated gate.Biogas cabinet is equipped with methane outlet, the biogas with methane boiler 13 Import connection, controls connection situation by manually-operated gate.The inner membrance height and gas-phase space pressure condition of biogas cabinet pass through liquid level Sensor and pressure sensor are sent to central control system.

11, anaerobic digestion is into mud screw pump: sucked by the volume variation of the seal chamber formed by screw and bushing with Material is discharged, it is insensitive to the viscosity of medium, it can transport high viscosity medium, stator and rotor are that heat resistant and wear resistant is corrosion resistant Stainless steel material.Anaerobic digestion is equipped with the import of pyrohydrolysis sludge into mud screw pump, connect with pyrohydrolysis sludge heat-exchange system 12, if Manually-operated gate controls connection situation.Anaerobic digestion is equipped with pyrohydrolysis sludge outlet into mud screw pump, with anaerobic sequencing batch reactor tank 5 The pyrohydrolysis sludge import of bottom sides connects, if operated pneumatic valve and manually-operated gate control connection situation.

12, pyrohydrolysis sludge heat-exchange system: the system is double pipe heat exchanger, and inner tube is pyrohydrolysis sludge channel, outer tube For cooling-water duct.Pyrohydrolysis sludge heat-exchange system is equipped with the import of pyrohydrolysis sludge, the flash distillation sludge outlet with 4 bottom of flash tank Connection controls connection situation by operated pneumatic valve and manually-operated gate.Pyrohydrolysis sludge heat-exchange system is equipped with pyrohydrolysis sludge outlet, It is connect with the pyrohydrolysis sludge import of anaerobic digestion into mud screw pump 11, connection situation is controlled by manually-operated gate.Pyrohydrolysis is dirty Mud heat-exchange system is equipped with cooling water inlet, connect with cooling water source, controls connection situation by manually-operated gate.Pyrohydrolysis sludge changes Hot systems are equipped with cooling water outlet, drain into other technique units.

13, methane boiler: being made of biogas combustion chamber and saturated steam generator, and the heat that biogas combustion generates will soften Water heating pressurization becomes saturated vapor, the size and pressure of methane boiler, according to the saturated vapor demand of pyrohydrolysis technique and Reaction pressure determines.Methane boiler is equipped with biogas import, connect with the methane outlet of biogas cabinet 10, is controlled and is connected by manually-operated gate Understanding and considerate condition.Methane boiler is equipped with softening water inlet, connect with the softening water out of water softening device.Methane boiler is equipped with saturation and steams Vapor outlet is connect with the saturated vapor import of 3 bottom of pyrohydrolysis reactor tank, is connected to feelings with manually-operated gate control by operated pneumatic valve Condition.Methane boiler is equipped with combustion flue gas outlet, connect with exhaust gas treatment unit.

14, pyrohydrolysis is into mud screw pump: sucking and arranges by the volume variation of the seal chamber formed by screw and bushing Material out, it is insensitive to the viscosity of medium, it can transport high viscosity medium, stator and rotor are that heat resistant and wear resistant is corrosion resistant not Rust steel material.Pyrohydrolysis is equipped with the import of pulp sludge into mud screw pump, connect with the pulp sludge outlet of 2 bottom of pulp tank, leads to Cross operated pneumatic valve and manually-operated gate control connection situation.Pyrohydrolysis is equipped with pulp sludge outlet into mud screw pump, anti-with pyrohydrolysis The pulp sludge import of 3 upper side of tank is answered to connect, if operated pneumatic valve and manually-operated gate control connection situation.

15, pulp is into mud plunger pump: moving back and forth in cylinder body by plunger, becomes the volume of seal operation cavity Change to realize the sucking and extrusion of material, so that material conveying is carried out, the field for being suitble to high pressure, big flow and flow to need to adjust It closes.Pulp is equipped with the import of pre-dehydration sludge into mud plunger pump, connect with the pre-dehydration sludge outlet of 1 bottom of sludge buffering chamber, leads to Cross manually-operated gate control connection situation.Pulp is equipped with pre-dehydration sludge outlet into mud plunger pump, pre- with 2 upper side of pulp tank Dewatered sludge import connection controls connection situation by operated pneumatic valve and manually-operated gate.

16, central control system: the operation of whole system is directly controlled by PLC system, and display operation data uploads simultaneously and storage It deposits.All devices mode of operation is to automatically control in system, each equipment can carry out it is individually operated, and can combined operation.Control Cabinet has the interface for showing signal to central control room PLC transmission state and receiving PLC output control signal and receives Central Control Room The signaling interface of remote control.System configuration detects instrumentation accordingly, it can be achieved that making rationally to the operating status of whole system The conclusion correctly judged, and above-mentioned signal is sent in the field control station of place monomer.Central control system can be to operation number According to being shown, recorded and stored.Whole system can realize automatic control, be not necessarily to manual intervention.Whole system is relevant Pipeline is designed according to parameters such as flow, pressure, requirements for anticorrosion.All hand-operated valves are used for connection and equipment when putting equipment in service Because of isolation when maintenance and repair is out of service.All pneumatic operated valves, according to process operation timing by system automatic control switch state.

The sludge buffering chamber is the column sealed tank body of carbon steel material of cone bucket type structure；The pulp tank, is detested flash tank Oxygen sequence batch reactor tank is cylindrical stainless steel atmospheric pressure sealed tank body；The pyrohydrolysis reactor tank is cylindrical stainless steel pressure Sealed shell of tank, the design pressure of the cylinder stainless steel sealed shell of tank are 1.2MPa-1.6MPa；The cross-flow filtration membrane module packet Membrane tube body and built-in film wire are included, membrane tube body is used to support film wire, and provides for supernatant in anaerobic sequencing batch reactor tank elongated Circulation canal；The membrane module produces water diaphragm pump, digestion supernatant circulation diaphragm pump is electric diaphragm pump；The pyrohydrolysis is dirty Mud heat-exchange system is double pipe heat exchanger, and inner tube is pyrohydrolysis sludge channel, and outer tube is cooling-water duct.

The central control system include controller, the first temperature sensor, second temperature sensor, third temperature sensor, 4th temperature sensor；First temperature sensor, second temperature sensor, third temperature sensor, the 4th temperature sensing Device is connect with controller data signal；It is anti-that first temperature sensor and second temperature sensor are respectively arranged at pyrohydrolysis Tank, flash tank and the tank connected high temperature steam pipe road of pulp are answered, for real-time monitoring pyrohydrolysis reactor tank, the high temperature of flash tank The temperature signal of steam, and the temperature signal of monitoring is sent to controller；The third temperature sensor is set to dilution and changes In hot cell, the sludge temperature that heat exchange unit is diluted and exchanges heat to the pyrohydrolysis sludge in flash tank is diluted for real-time monitoring Signal is spent, and the sludge temperature signal of monitoring is sent to controller；4th temperature sensor is set to anaerobic sequencing batch Temperature signal in reactor tank for the reaction of real-time monitoring anaerobic fermentation, and the signal of monitoring is sent to controller；Controller The real time temperature signal received is stored in memory module after data conversion, and is compared with corresponding preset threshold Compared with, and comparison result is stored in memory module.

Be provided on the combustible gas gas outlet of the anaerobic sequencing batch reactor tank connect with controller data signal it is flammable Gas concentration sensor, flow sensor, combustible gas concentration signal and combustible gas flow for real-time monitoring combustible gas gas outlet Signal, and the signal of monitoring is sent to controller；Flow control valve is additionally provided on the combustible gas gas outlet；The control Device is connect with Flux Valve Control；The real-time prison that the controller is sent according to combustible gas concentration sensor and flow sensor Signal is surveyed, is stored in after data conversion in the memory module, and be compared with corresponding preset threshold, and will be compared As a result it is stored in memory module, the regulated quantity of flow control valve is controlled according to comparison result.

Blender is provided in the anaerobic sequencing batch reactor tank, the blender is connected with controller；The middle control System further includes the timer being connected with controller.

It is provided with discharge baffle on the mineralising sludge outlet, is provided on the discharge baffle and is connected with controller Pressure sensor, for real-time monitoring discharge baffle mineralising sludge pressure signal, and by the pressure signal of real-time monitoring send out It send to controller；The real-time pressure monitoring signals that controller will receive, are stored in the memory module after data conversion, And be compared with corresponding preset threshold, and comparison result is stored in memory module, it controls according to the result of the comparison Baffle automatic open close is discharged.

A kind of batch-type anaerobic digestion device based on pyrohydrolysis and UF membrane according to claim 1 or 2, it is special Sign is that the central control system includes controller, the first liquid level sensor being arranged in sludge buffering chamber, is arranged in pulp tank Interior the second liquid level sensor and first gas pressure sensor, the third liquid level sensor and the second gas being arranged in flash tank Pressure sensor, the 4th liquid level sensor being arranged in anaerobic sequencing batch reactor tank and third gas pressure sensor are set It sets and washes unit, the 5th liquid level being arranged in biogas cabinet with automatic in the Automatic Dosing control unit in cross-flow filtration membrane module Sensor and the 4th gas pressure sensor；First liquid level sensor, the second liquid level sensor and first gas pressure pass Sensor, third liquid level sensor and second gas pressure sensor, the 4th liquid level sensor and third gas pressure sensor, Five liquid level sensors and the 4th gas pressure sensor are connect with controller data signal, are used for real-time detection position to be installed Liquid level and gas pressure signal, and the liquid level and gas pressure signal that will test are sent to controller；Controller will receive Real-time level and gas pressure signal be stored in after data conversion in the storage unit of controller；The controller also and from Dynamic Adding medicine control unit and automatic washing unit control connection.

The present invention is based on the application methods of pyrohydrolysis and the batch-type anaerobic digestion device of UF membrane to include the following steps:

3) when the mode of operation of pyrohydrolysis reactor tank is into mud, it is ensured that the manually-operated gate of pulp pot bottom is in opening state State, central control system issue instruction, and the operated pneumatic valve of pulp pot bottom is opened, and pyrohydrolysis, will be in pulp tank into mud snail bar pump startup Pulp sludge pumping into pyrohydrolysis reactor tank, when in tank liquid level be higher than terminate liquid level into mud when, central control system issues instruction, Pyrohydrolysis stops into mud screw pump, and the operated pneumatic valve of pulp pot bottom is closed；The mode of operation of pyrohydrolysis reactor tank is converted to liter Temperature, it is ensured that the manually-operated gate that pyrohydrolysis reacts pot bottom is in the open state, and central control system issues instruction, pyrohydrolysis reactor tank bottom The operated pneumatic valve in portion is opened, and methane boiler inputs saturated vapor to pyrohydrolysis reactor tank, and pressure is generally in 1.2MPa-1.6MPa model Interior selection is enclosed, when the pressure in pyrohydrolysis reactor tank reaches setting value, generally 0.6MPa-1.0MPa, corresponding temperature 160 DEG C -180 DEG C, central control system issues instruction, and the operated pneumatic valve that pyrohydrolysis reacts pot bottom is closed, and methane boiler stops to pyrohydrolysis Reactor tank inputs saturated vapor；The mode of operation of pyrohydrolysis reactor tank is converted to heat preservation, and duration certain time, generally exists It is set within the scope of 30min-60min, the mode of operation of pyrohydrolysis reactor tank is converted to pressure release, it is ensured that pulp pot bottom side The manually-operated gate of process gas import is in the open state, and central control system issues instruction, process gas outlet at the top of pyrohydrolysis reactor tank Operated pneumatic valve open, the high-temperature steam and process gas of pyrohydrolysis reactor tank inner upper end are discharged to pulp tank, when pyrohydrolysis is anti- It answers the pressure reduction of tank to setting value, is generally set within the scope of 0.2MPa-0.5MPa, central control system issues instruction, pyrohydrolysis The operated pneumatic valve of process gas outlet is closed at the top of reactor tank；The mode of operation of pyrohydrolysis reactor tank is converted to spoil disposal, it is ensured that hot water The manually-operated gate of the pyrohydrolysis sludge flash distillation outlet of solution reaction pot bottom is in the open state, it is ensured that pulp pot bottom side technique The manually-operated gate of gas import is in the open state, and central control system issues instruction, and the pyrohydrolysis sludge that pyrohydrolysis reacts pot bottom dodges The operated pneumatic valve for steaming mouth is opened, and the operated pneumatic valve of flash drum overhead process gas outlet is opened, the hot water in pyrohydrolysis reactor tank It solves sludge and enters flash tank under pressure inside the tank effect, after the pressure reduction of pyrohydrolysis reactor tank is to 0.01MPa, central control system Instruction is issued, the operated pneumatic valve that pyrohydrolysis reacts the pyrohydrolysis sludge flash distillation outlet of pot bottom is closed, flash drum overhead process gas The operated pneumatic valve of outlet is closed；The mode of operation of pyrohydrolysis reactor tank is converted into mud, into next operation circulation；

This hair can be understood and applied the above description of the embodiments is intended to facilitate those skilled in the art It is bright.Person skilled in the art obviously easily can make various modifications to these embodiments, and described herein General Principle is applied in other embodiments without having to go through creative labor.Therefore, the present invention is not limited to implementations here Example, those skilled in the art's announcement according to the present invention, improvement and modification made without departing from the scope of the present invention all should be Within protection scope of the present invention.

Claims

1. a kind of batch-type anaerobic digestion device based on pyrohydrolysis and UF membrane, which is characterized in that the device includes that sludge is slow Storage (1), pulp tank (2), pyrohydrolysis reactor tank (3), flash tank (4), anaerobic sequencing batch reactor tank (5), cross-flow filtration film group Part (6), membrane module produce water diaphragm pump (7), digestion supernatant recycles diaphragm pump (8), mineralising sludge dewatering system (9), biogas cabinet (10), anaerobic digestion is into mud screw pump (11), pyrohydrolysis sludge heat-exchange system (12), methane boiler (13), pyrohydrolysis into mud snail Bar pumps (14), pulp into mud plunger pump (15), central control system (16)；Wherein, sludge buffering chamber is connected by pulp into mud plunger pump Connect the pre-dehydration sludge import of pulp tank upper side；The pulp tank top, which is equipped with, reacts tank connected heat with anaerobic sequencing batch The outlet of hydrolysis process gas, bottom sides set pyrohydrolysis process gas import, and the pyrohydrolysis process gas import is anti-with pyrohydrolysis respectively Tank is answered to connect with flash tank；The pulp pot bottom also sets pulp sludge outlet, which passes through pyrohydrolysis into mud Screw rod pump group is connect with pyrohydrolysis reactor tank, and the pyrohydrolysis reactor tank is connected with flash tank；Pyrohydrolysis reactor tank bottom Portion is equipped with the saturated vapor import connecting with methane boiler, and the biogas import of the methane boiler and biogas cabinet methane outlet connect It connects；The biogas cabinet is equipped with the biogas import connecting with anaerobic sequencing batch reactor tank top-side methane outlet；The flash tank Bottom is equipped with the flash distillation sludge outlet connecting with pyrohydrolysis sludge heat-exchange system, and pyrohydrolysis sludge heat-exchange system is equipped with heat-exchange system Pyrohydrolysis sludge outlet, the heat-exchange system pyrohydrolysis sludge outlet and anaerobic digestion are into mud screw pump into mud screw pump pyrohydrolysis Sludge import connection；The anaerobic digestion is equipped with into mud screw pump into mud screw pump pyrohydrolysis sludge outlet, should be into mud screw pump Pyrohydrolysis sludge outlet is connect with the reactor tank pyrohydrolysis sludge import of anaerobic sequencing batch reactor tank bottom sides；The anaerobism sequence Batch reactor tank side is equipped with digested sludge or the purified liquor outlet of different height, the digested sludge or purified liquor outlet respectively with cross-flow Filtering film component is connected with digestion supernatant circulation diaphragm pump group；The anaerobic sequencing batch reaction pot bottom is equipped with and mineralising sludge The mineralising sludge outlet of dewatering system connection；The bottom of the mineralising sludge dewatering system is additionally provided with dehydration filtrate outlet；It is described The outlet of digestion supernatant circulation diaphragm pump is connect with the supernatant import of the membrane tube body of cross-flow filtration membrane module；The membrane module The import for producing water diaphragm pump goes out water out with the film of cross-flow filtration membrane module bottom and connect, and the membrane module produces water diaphragm pump and also sets It is equipped with film filtrate outlet；The central control system respectively with sludge buffering chamber, pulp tank, pyrohydrolysis reactor tank, flash tank, anaerobism It is de- that batch-type reactor tank, cross-flow filtration membrane module, membrane module produce water diaphragm pump, digestion supernatant circulation diaphragm pump, mineralising sludge Water system, biogas cabinet, anaerobic digestion are into mud screw pump, pyrohydrolysis sludge heat-exchange system, methane boiler, pyrohydrolysis into mud snail bar Pump, pulp are controlled into mud plunger pump and are connected.

2. a kind of batch-type anaerobic digestion device based on pyrohydrolysis and UF membrane according to claim 1, feature exist In the sludge buffering chamber is the column sealed tank body of carbon steel material of cone bucket type structure；The pulp tank, flash tank, anaerobism sequence Batch reactor tank is cylindrical stainless steel atmospheric pressure sealed tank body；The pyrohydrolysis reactor tank is cylindrical stainless steel pressure sealing Tank body, the design pressure of the cylinder stainless steel sealed shell of tank are 1.2MPa-1.6MPa；The cross-flow filtration membrane module includes film Tube body and built-in film wire, membrane tube body is used to support film wire, and provides elongated circulation for supernatant in anaerobic sequencing batch reactor tank Channel；The membrane module produces water diaphragm pump, digestion supernatant circulation diaphragm pump is electric diaphragm pump；The pyrohydrolysis sludge changes Hot systems are double pipe heat exchanger, and inner tube is pyrohydrolysis sludge channel, and outer tube is cooling-water duct.

3. a kind of batch-type anaerobic digestion device based on pyrohydrolysis and UF membrane according to claim 2, feature exist In the central control system includes controller, the first temperature sensor, second temperature sensor, third temperature sensor, the 4th temperature Spend sensor；First temperature sensor, second temperature sensor, third temperature sensor, the 4th temperature sensor with The connection of controller data signal；First temperature sensor and second temperature sensor be respectively arranged at pyrohydrolysis reactor tank, Flash tank and the tank connected high temperature steam pipe road of pulp, for real-time monitoring pyrohydrolysis reactor tank, the high-temperature steam of flash tank Temperature signal, and the temperature signal of monitoring is sent to controller；It is single that the third temperature sensor is set to dilution heat exchange In member, the sludge temperature that the pyrohydrolysis sludge in flash tank is diluted and exchanges heat is believed for real-time monitoring dilution heat exchange unit Number, and the sludge temperature signal of monitoring is sent to controller；4th temperature sensor is set to anaerobic sequencing batch reaction Temperature signal in tank for the reaction of real-time monitoring anaerobic fermentation, and the signal of monitoring is sent to controller；Controller will connect The real time temperature signal received is stored in memory module after data conversion, and is compared with corresponding preset threshold, and Comparison result is stored in memory module.

4. a kind of batch-type anaerobic digestion device based on pyrohydrolysis and UF membrane according to claim 3, feature exist In being provided with the flammable gas concentration connecting with controller data signal on the combustible gas gas outlet of the anaerobic sequencing batch reactor tank Sensor, flow sensor, for the combustible gas concentration signal and combustible gas flow signal of real-time monitoring combustible gas gas outlet, and The signal of monitoring is sent to controller；Flow control valve is additionally provided on the combustible gas gas outlet；The controller and stream Adjustable valve control connection；The controller is believed according to the real-time monitoring that combustible gas concentration sensor and flow sensor are sent Number, it is stored in after data conversion in the memory module, and be compared with corresponding preset threshold, and by comparison result It is stored in memory module, the regulated quantity of flow control valve is controlled according to comparison result.

5. a kind of batch-type anaerobic digestion device based on pyrohydrolysis and UF membrane according to claim 4, feature exist In being provided with blender in the anaerobic sequencing batch reactor tank, the blender is connected with controller；The central control system is also Including the timer being connected with controller.

6. a kind of batch-type anaerobic digestion device based on pyrohydrolysis and UF membrane according to claim 5, feature exist In being provided with discharge baffle on the mineralising sludge outlet, be provided with the pressure being connected with controller on the discharge baffle Force snesor for the mineralising sludge pressure signal of real-time monitoring discharge baffle, and the pressure signal of real-time monitoring is sent to Controller；The real-time pressure monitoring signals that controller will receive, are stored in the memory module after data conversion, and with Corresponding preset threshold is compared, and comparison result is stored in memory module, according to the result of the comparison control discharge Baffle automatic open close.

7. a kind of batch-type anaerobic digestion device based on pyrohydrolysis and UF membrane according to claim 1 or 2, feature It is, the central control system includes controller, the first liquid level sensor being arranged in sludge buffering chamber, is arranged in pulp tank The second liquid level sensor and first gas pressure sensor, the third liquid level sensor that is arranged in flash tank and second gas Pressure sensor, the 4th liquid level sensor being arranged in anaerobic sequencing batch reactor tank and third gas pressure sensor, setting It is passed in the Automatic Dosing control unit in cross-flow filtration membrane module with automatic washing unit, the 5th liquid level being arranged in biogas cabinet Sensor and the 4th gas pressure sensor；First liquid level sensor, the second liquid level sensor and first gas pressure sensing Device, third liquid level sensor and second gas pressure sensor, the 4th liquid level sensor and third gas pressure sensor, the 5th Liquid level sensor and the 4th gas pressure sensor are connect with controller data signal, for real-time detection position to be installed Liquid level and gas pressure signal, and the liquid level and gas pressure signal that will test are sent to controller；Controller will receive Real-time level and gas pressure signal are stored in the storage unit of controller after data conversion；The controller is also and automatically Adding medicine control unit and automatic washing unit control connection.

8. a kind of a kind of use of the batch-type anaerobic digestion device based on pyrohydrolysis and UF membrane according to claim 7 Method, which is characterized in that the application method includes the following steps:

1) sludge of sewage treatment plant is pumped into sludge caching feed bin, it is ensured that material after pre-dehydration to moisture content is 80-90% The manually-operated gate in orlop portion is in the open state, and when the sludge liquid level in pulp tank is lower than into mud liquid level, central control system is issued Instruction, pulp is into mud plunger pump startup, by the pre-dehydration sludge pumping in sludge buffering chamber into pulp tank, when sludge liquid in tank When position is higher than liquid level is terminated into mud, central control system issues instruction, and pulp stops into mud plunger pump；

2) it is located at the pre-dehydration mud cake in pulp tank and absorbs the high-temperature steam discharged from pyrohydrolysis reactor tank and flash tank and technique Gas, to be warmed and dilute；

3) when the mode of operation of pyrohydrolysis reactor tank is into mud, it is ensured that the manually-operated gate of pulp pot bottom is in the open state, Central control system issues instruction, and the operated pneumatic valve of pulp pot bottom is opened, and pyrohydrolysis is into mud snail bar pump startup, by the slurry in pulp tank Change sludge pumping into pyrohydrolysis reactor tank, when in tank liquid level be higher than terminate liquid level into mud when, central control system issues instruction, hot water Solution stops into mud screw pump, and the operated pneumatic valve of pulp pot bottom is closed；The mode of operation of pyrohydrolysis reactor tank is converted to heating, really The manually-operated gate of thermal protection hydrolysis pot bottom is in the open state, and central control system issues instruction, and pyrohydrolysis reacts pot bottom Operated pneumatic valve is opened, and methane boiler inputs saturated vapor to pyrohydrolysis reactor tank, and pressure is generally within the scope of 1.2MPa-1.6MPa Selection, when the pressure in pyrohydrolysis reactor tank reaches setting value, generally 0.6MPa-1.0MPa, corresponding temperature is 160 DEG C -180 DEG C, central control system issues instruction, and the operated pneumatic valve that pyrohydrolysis reacts pot bottom is closed, and methane boiler stops to pyrohydrolysis reactor tank Input saturated vapor；The mode of operation of pyrohydrolysis reactor tank is converted to heat preservation, and duration certain time, generally in 30min- It is set within the scope of 60min, the mode of operation of pyrohydrolysis reactor tank is converted to pressure release, it is ensured that pulp pot bottom side process gas The manually-operated gate of import is in the open state, and central control system issues instruction, and process gas outlet is pneumatic at the top of pyrohydrolysis reactor tank Valve opening, the high-temperature steam and process gas of pyrohydrolysis reactor tank inner upper end are discharged to pulp tank, when pyrohydrolysis reactor tank Pressure reduction is generally set within the scope of 0.2MPa-0.5MPa, central control system issues instruction, pyrohydrolysis reactor tank to setting value The operated pneumatic valve of top process gas outlet is closed；The mode of operation of pyrohydrolysis reactor tank is converted to spoil disposal, it is ensured that pyrohydrolysis reaction The manually-operated gate of the pyrohydrolysis sludge flash distillation outlet of pot bottom is in the open state, it is ensured that the process gas import of pulp pot bottom side Manually-operated gate it is in the open state, central control system issue instruction, pyrohydrolysis react pot bottom pyrohydrolysis sludge flash outlet Operated pneumatic valve open, the operated pneumatic valve of flash drum overhead process gas outlet is opened, the pyrohydrolysis sludge in pyrohydrolysis reactor tank Enter flash tank under pressure inside the tank effect, after the pressure reduction of pyrohydrolysis reactor tank is to 0.01MPa, central control system sending refers to It enables, the operated pneumatic valve that pyrohydrolysis reacts the pyrohydrolysis sludge flash distillation outlet of pot bottom is closed, the outlet of flash drum overhead process gas Operated pneumatic valve is closed；The mode of operation of pyrohydrolysis reactor tank is converted into mud, into next operation circulation；

4) ensure the manually-operated gate of flash tank bottom, the pyrohydrolysis sludge import of anaerobic sequencing batch reactor tank bottom sides it is manual Valve, anaerobic digestion into mud screw pump pyrohydrolysis sludge import manually-operated gate and pyrohydrolysis sludge heat-exchange system cooling water The manually-operated gate in source is in the open state, and when the mode of operation of anaerobic sequencing batch reactor tank is input and output material, central control system is issued Instruction, the operated pneumatic valve of the pyrohydrolysis sludge import of the operated pneumatic valve and anaerobic sequencing batch reactor tank bottom sides of flash tank bottom It opens, into mud snail bar pump startup, the pyrohydrolysis sludge in flash tank is cooled to by pyrohydrolysis sludge heat-exchange system for anaerobic digestion Set temperature, generally selects within the scope of 40 DEG C -60 DEG C, is then anaerobically digested into mud screw pump and is pumped into anaerobic sequencing batch Reactor tank；After inputiing mud volume reaches setting value, central control system issues instruction, and anaerobic digestion stops into mud screw pump, flash tank bottom The operated pneumatic valve of the pyrohydrolysis sludge import of the operated pneumatic valve and anaerobic sequencing batch reactor tank bottom sides in portion is closed；

5) process timing sequence of anaerobic sequencing batch reactor tank is " stirring stopping-sludge settling-synchronization input and output material-stirring starting ", instead Answer each hydraulic detention time of tank that the mineralising sludge of set amount can be discharged from the mineralising sludge outlet of bottom；When anaerobic digestion is reacted Reach the time of setting, the stirring system of anaerobic sequencing batch reactor tank is out of service, the mode of operation of anaerobic sequencing batch reactor tank Sedimentation is converted to, after the sedimentation time reaching setting value, the mode of operation of anaerobic sequencing batch reactor tank is converted to input and output material, charging Operation is as mentioned before；When discharging, it should be ensured that at the manually-operated gate between anaerobic sequencing batch reactor tank and cross-flow filtration membrane module In open state, it should be ensured that the manually-operated gate between anaerobic sequencing batch reactor tank and digestion supernatant circulation diaphragm pump group, which is in, to be opened Open state, it should be ensured that the manually-operated gate that the film of cross-flow filtration membrane module goes out between water out and membrane module production water diaphragm pump, which is in, to be opened Open state, it should be ensured that the manually-operated gate between the membrane tube body and digestion supernatant circulation diaphragm pump group of cross-flow filtration membrane module is in Open state, central control system issue instruction, and while anaerobic digestion is into mud snail bar pump startup, successively starting digestion supernatant is followed Ring diaphragm pump and membrane module produce water diaphragm pump, and after water yield reaches setting value, central control system issues instruction, successively close film group Part produces water diaphragm pump and digestion supernatant recycles diaphragm pump；The filtered fluid of generation enters subsequent process unit；

6) biogas that anaerobic digestion process generates enters biogas cabinet by the methane outlet of anaerobic sequencing batch reactor tank top-side, It is ensured that the manually-operated gate of the methane outlet of anaerobic sequencing batch reactor tank top-side is in the open state, biogas output by The metering of linear flow rate meter, signal are sent to central control system, can check real-time traffic and cumulative production；Biogas in biogas cabinet is according to warm The mode of operation of hydrolysis tank and methane boiler enters the combustion chambers burn heat release of methane boiler, it should be ensured that biogas cabinet and biogas Manually-operated gate between boiler is in the open state；

7) ensure that the manually-operated gate of anaerobic sequencing batch reaction pot bottom is in the open state, when anaerobic digestion process continues a water After the power residence time, central control system issues instruction, and the operated pneumatic valve that anaerobic sequencing batch reacts pot bottom is opened, mineralising sludge dewatering The mineralising sludge that anaerobic sequencing batch reactor tank is discharged in system starting is dehydrated, when the mineralising of anaerobic sequencing batch reactor tank discharge After sludge reaches set amount, central control system issues instruction, and the operated pneumatic valve that anaerobic sequencing batch reacts pot bottom is closed, mineralising sludge Dewatering system stops；The filtrate and filter cake that mineralising sludge dewatering system generates enter subsequent process unit.