CN103304118A

CN103304118A - High-pressure digestion and blasting dehydration process of sludge

Info

Publication number: CN103304118A
Application number: CN2012100813633A
Authority: CN
Inventors: 李铀
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-03-15
Filing date: 2012-03-15
Publication date: 2013-09-18

Abstract

The invention discloses a new technology of sludge treatment, namely a high-pressure digestion and blasting dehydration process of sludge. The high-pressure digestion and blasting dehydration process of the sludge comprises the steps of: (1) aerating and pressurizing the sludge in an anoxic sealed digestion container, carrying out large denitrification, degrading an organic matter; aerating and pressurizing in an aerobic sealed container; increasing the oxygen utilization rate; greatly breeding sludge aerobes, generating a lot of heat energy to heat the sludge; and rapidly degrading the organic matter and killing pathogenic bacteria and parasite (spawn) in the sludge; (2) organically decomposing the viscosity of the sludge at high pressure and high temperature; cracking a gel structure, separating bound water from solid particles; splitting the microbial cell wall and separating free-state moisture from the moisture in the cell; (3) achieving sludge blasting of the digested sludge at high pressure and mutational normal pressure; thoroughly cracking and easily dewatering the sludge on the microbial cell wall; (4) removing a dynamic dewatering machine and saving a coagulant in blasting and dewatering mud-water separation.

Description

Sludge high-pressure digestion, explosion processed method

Technical field:

The invention discloses a kind of sludge treatment novel process---the digestion of-sludge high-pressure high temperature Anoxic/Aerobic, explosion processed method belong to field of environment protection.

Background technology:

The wastewater treatment in China amount reaches 280 billion cubic meters at present, and wet mud (water ratio a 80%) year generation is broken through 2,000 ten thousand tons, shows that according to the Ministry of Construction's data mud that China's Sewage Plant produces has 80% not process.Contain large amount of organic and pathogenic bacteria in the mud, parasite (ovum), heavy metal, salt and polychlorobiphenyl, dioxin, the hazardous and noxious substances of the difficult degradations such as radionuclide also contains a large amount of protein simultaneously, the high-enriched organics such as fat.The pollution that mud causes causes the concern of society with pollution problem again, and huge sludge yield has become the great burden of sewage disposal.Traditional method for sludge treatment (such as sludge composting, burning or landfill) is because the viscosity of mud is large, water ratio is higher, solid-liquid separation is poor, resisted the sludge product market shrink.Therefore seek sludge treatment new way and treatment technology, too impatient to wait.

Summary of the invention:

Now the sludge treatment novel process of invention---sludge high-pressure high temperature Anoxic/Aerobic digests, explosion processed method: be to seal on traditional digestion vessel, in airtight digestion vessel, carry out the air blast pressurization, make inside, pond bear high pressure, (1) this technique carries out pneumatic compression in the airtight digestion vessel of Anoxic/Aerobic, cause a large amount of anti-digestion occur in the anoxic digestion vessel, produce a large amount of basicity and come the energy consumption of additional nitration process, stable pH value is provided, and degradation of organic substances.Oxygen has higher conductivity under high pressure conditions in aerobic airtight digestion vessel, oxygen utilization rate increases, impel aerobic microbiological amount reproduction in the pond, and produce a large amount of heat energy and progressively make mud become high temperature, can degrade rapidly in mud organism and eliminate pathogenic bacteria in the mud, parasite (ovum) of aerobic high-heat digestion process after the pressurization.(2) the viscosity organic decomposition of mud under the high pressure-temperature, the mud colloidal structure breaks, and irreducible water is separated with solid particulate.Under the high pressure-temperature in the mud microorganism wall divide, moisture is released and isolates free state moisture and easily dewater in the born of the same parents, (3) process rear mud and the normal pressure that suddenlys change again under high pressure-temperature and realize the mud explosion, the thorough division of microorganism wall generation mud easily dewaters in the mud.This art breading facility volume is little, takes up an area to lack, and the residence time is short, less investment, and ordorless smell and mud secondary pollution, fertilizer efficiency is high, can directly do farm manure, is fit to the sludge treatment novel method of various Sewage Plant.

(4) simultaneously a further object of the present invention is that the container such as digester carries out the large characteristics of mud mouth pressure after the pressure treatment, utilize mud mouth pressure to realize mud explosion filter-press dehydration, can save full-time water extracter and save coagulating agent, make this technique realize that digestion is dewatering integrated.

Description of drawings:

Sludge treatment novel process---the digestion of sludge high-pressure high temperature Anoxic/Aerobic, explosion processed method schema

Specific implementation method:

Traditional digestion vessel sealed to cause to be installed with in can bearing execute, in anoxic and aerobic airtight digestion vessel, carry out air blast pressurization or aeration aerating.Advance and establish booster fan and slush pump before mud (2) and air inlet (3) enter digestion vessel, require digestion vessel to satisfy the demands in pressure tank internal pressure 1～20 Palestine and Israel.Air inlet does not need to contact with mud liquid in the airtight digestion vessel of anoxic (1), and mud liquid keeps anoxic condition, and mud need have internal recycle in the pond.The interior gas of aerobic airtight digestion vessel (11) and mud liquid want abundant mixed soil liquid to maintain oxygen condition, and mud need have internal recycle (4) in the pond, and anoxic and aerobic sludge need have outer circulation (10) outside the pond.Anoxic, aerobic sigestion container (1) (11) pattern: can adopt tower, autoclave, box, well formula, ductwork type.Container material quality: with Steel Concrete, steel, glass reinforced plastic etc., should satisfy container demand pressure pond internal pressure 1～20 bar.

Certain gas space is arranged at the top in encloses container.Pond internal pressure control 1-20 bar, 40 ℃-85 ℃ of mud temperature controls, exhaust emissions setting pressure table, thermometer and safety-valve (5) mustn't have anaerobism to occur in the pond, have anaerobism to need in time to discharge, and guarantee operating safety.

Aeration oxygenator adopts micropore, middle micropore, macropore aerator or jet aerator (6).First pond, pond tail is equipped with tensimeter and strictly controls the pond internal pressure and guarantee safety.Aeration aerating can fill air, oxygen enrichment, pure oxygen.

Mud mouth pressure was larger after the aerobic sigestion container carried out pressure treatment, adopted the normal pressure that suddenlys change again to realize the mud explosion under high pressure-temperature, and the thorough division of microorganism wall generation mud easily dewaters in the mud.Can utilize mud extraction pressure to realize mud explosion filter-press dehydration (7), utilize self pressure realization mud (8) water (9) separation, blowdown mud can save the conventional dehydration machine and save coagulating agent, makes this technique realize digesting dewatering integrated.

Claims

1. the sludge treatment novel process----sludge high-pressure high temperature Anoxic/Aerobic digests, explosion processed method, (1) this technique is advanced mud (2) top air inlet inflating pressure (3) pond internal pressure 1～20 bar in the airtight digestion vessel of anoxic (1) bottom, make a large amount of anti-digestion occur in the anoxic digestion vessel, produce a large amount of basicity and come the energy consumption of additional nitration process, stable pH value is provided, and degradation of organic substances.In aerobic airtight digestion vessel (11) mud liquid, inflate (oxygenation) pressurization (3) pond internal pressure 1～20 bar, air (oxygen) mud liquid and oxygen under high pressure conditions are mixed with higher conductivity, oxygen utilization rate increases, in the pond under the certain high pressure condition aerobic microbiological amount reproduction, and produce a large amount of heat energy and progressively make mud become high temperature, aerobic sigestion is processed in the mud of can degrading rapidly organism and is eliminated pathogenic bacteria in the mud, parasite (ovum).(2) the viscosity organic decomposition of mud under the high pressure-temperature, the mud colloidal structure breaks, and irreducible water is separated with solid particulate.Under the high pressure-temperature in the mud microorganism wall break, moisture is released and isolates free state moisture in the born of the same parents, (3) process rear mud and the normal pressure that under high pressure-temperature, suddenlys change again and realize the mud explosion, the microorganism wall sludge microbe ICW that occurs thoroughly to break is separated out in the mud, and the mud after the explosion treatment easily dewaters.(4) the mud colloidal structure is owing to high pressure-temperature breaks, irreducible water is separated with solid particulate, microorganism wall breaks in the mud, mud and the normal pressure that suddenlys change again under high pressure-temperature are realized the mud explosion after processing, moisture occurs in the thorough ruptured cell and isolates into free state moisture in microorganism wall in the mud, easily separated so the dehydration of muddy water can be less with or without coagulating agent, top hole pressure is larger, utilize mud mouth high pressure realization mud-water separation to save special dewatering apparatus thereof, this technique realizes anoxic digestion, aerobic sigestion, sludge dewatering integrated.

2. according to right 1.This technique carries out pneumatic compression (3) on the airtight digestion vessel of anoxic (1) top, pond internal pressure 1-20 bar, and gas does not need to contact gas top in encloses container with mud liquid certain space.Mud liquid keeps anoxic condition, and mud need have internal recycle (4) mud liquid to need fully to stir in the pond.

3. according to right 1.Requirement is inflated (oxygenation) (3) in aerobic airtight digestion vessel (11) mud, pond internal pressure control 1-20 bar, and certain space is arranged at gas top in encloses container.Exhaust emissions setting pressure table and safety-valve (5), 40 ℃-85 ℃ of mud temperature, gas and the abundant mixed soil liquid of mud liquid maintain oxygen condition in the aerobic airtight digestion vessel, mud need have internal recycle (4) mud liquid to need fully to stir in the pond, outside the pond anoxic and aerobic between mud outer circulation (10) need be arranged.

4. according to right 1 requirement.Sludge high-pressure high temperature Anoxic/Aerobic digestion, explosion processed method technique, Anoxic/Aerobic digestion vessel (1) (11) can adopt minute to be built or builds jointly, can move continuously segmentation and by stages moving.Container pattern: can adopt tower, autoclave, box, well formula, ductwork type.Container material quality: need satisfy 1～20 bar with bearing pressure in the ponds such as Steel Concrete, steel, glass reinforced plastic.

5. according to right 1 requirement.Sludge digestion high pressure-temperature aerobic treatment (11) aeration oxygenator adopts micropore, middle micropore, macropore aerator or jet aerator (6).Aeration aerating can fill air, oxygen enrichment, pure oxygen.

6. according to right 1 requirement.Digestion vessel carries out that mud mouth adopts the normal pressure that suddenlys change again to realize the mud explosion after the pressure treatment under high pressure-temperature, microorganism wall division mud occurs thoroughly easily dewater and can use less or without coagulating agent in the mud.Utilize self pressure sludge press filtration dehydration (7), realize that mud (8) water (9) separates, blowdown mud can save the conventional dehydration machine, makes this technique realize that digestion is dewatering integrated.