CN102476905A

CN102476905A - Sludge treatment process suitable for solid waste

Info

Publication number: CN102476905A
Application number: CN2010105526617A
Authority: CN
Inventors: 陈洋
Original assignee: Dalian Chuangda Technology Trade Market Co Ltd
Current assignee: Dalian Chuangda Technology Trade Market Co Ltd
Priority date: 2010-11-22
Filing date: 2010-11-22
Publication date: 2012-05-30

Abstract

A sludge treatment process suitable for solid wastes is invented to solve the disposal problem of sludge from sewage treatment plants, and is a process which can perform harmless, quantitative-reduction, and resource treatment of sludge. The invention performs continuous treatment of sludge by processes of granulation (strip production), drying, and incineration; all microbes and parasite eggs can be killed in a short time, and quantitative reduction of the sludge is realized; particle organic composite fertilizer can be produced; the invention is suitable for the treatment of various organic sludge.

Description

A kind of sludge treatment technique that is suitable for solid waste

Technical field

The invention belongs to field of solid waste treating technology, be applicable to the needs that different scales organic sludge treatment unit is built.

Background technology

Mud follows the construction of sewage work to produce, and along with the continuous construction of sewage work, its quantity is also increasing rapidly; Because good without comparison method of disposal, mud is just seriously polluting environment, has become big public hazards.The way of handling mud at present both at home and abroad mainly contains landfill method, burning method and composting process.The landfill method floor space is big, must do antiseepage and handle, and also will build methane recovery system and water from diffusion treatment plant, easily underground water and ambient air is polluted, and resource can not be recycled; For populous, China of cultivated land resource growing tension more and more is difficult to implement.Burning method needs special-purpose incinerator, and investment is big, and working cost is high.The composting process floor space is big, and the time is long, grows mosquitos and flies easily, distributes stench, is difficult to form scale operation.

Summary of the invention

The object of the invention is exactly to develop a kind of sludge treatment technique that is suitable for solid waste.

Urban domestic sewage sludge is to be the organic sludge of staple with the organism, abbreviates mud as; Its main characteristic is that organic content is high, and water ratio high (near 80%) is degenerated smellyly easily, and particle is thinner, and ventilation property is poor, and density is less, and is bulky, has colloid property; Also contain a large amount of pathogenic micro-organisms and parasitic ovum in the primary sludge, can spread disease.

Because mud has these characteristics, causes transportation, processing, utilization to it all to have very big difficulty.

Characteristics of the present invention are carried out granulation (bar) earlier to mud exactly, and then dry, burning; Existing sludge drying process is directly to send into the drying machine drying after mud is adjusted moisture, and its shortcoming is that mud is prone to form than megalump in drying process, and the surface becomes stiff and inner and but changes not quite, makes drying efficiency not high; Also be prone to during sludge incineration form, be difficult to grill thoroughly, cause atmospheric pollution than megalump.

Technology of the present invention is the dewatered sludge of sewage work and part sludge-drying and a certain amount of mineral manure and auxiliary material (when with mud production composite fertilizer) are mixed the adjustment water ratio in mixing machine after, to add continuously in special screw rod (can be single screw rod or twin screw) extruder grain (bar) machine (can be vertical or horizontal); When the mud of extruding mutually during adhesion (water ratio is lower), can adopt screw extruder pelletizer, when the mutual adhesion of the mud of extruding (water ratio is higher), can adopt screw rod extruding strip making machine (only needing its outlet revolving scraper is unloaded); The outlet of screw rod extruder grain (bar) machine directly links to each other with the inlet of revolving drum drier; The mud import of revolving drum drier is suitably increased; A part of high-temperature flue gas is imported wherein in the place near the outlet of screw rod extruder grain (bar) machine, and with mud arranged certain duration of contact in vertical direction; The outlet of screw rod extruding strip making machine is always downward; When the mud bar has just been extruded, promptly contact with high-temperature flue gas, surface-moisture evaporates rapidly, makes the adhesion no longer mutually of mud bar, helps drying and dehydrating; After coming out from revolving drum drier, a part of dewatered sludge mixes with wet mud as returning charge, and another part dewatered sludge is sold as the fuel or the as fertilizer sources of oven dry mud; Through super-dry, the mud odorless, tasteless that becomes, wherein pathogenic micro-organism and parasitic ovum also are killed, and have realized innoxious.These processes just can be accomplished in a short period of time.

Advantage of the present invention is:

1. the mud specific surface area of granulation (bar) increases, and can improve drying efficiency.

2. the treatment time is short.

3. be the wet mud of fuel oven dry with the dewatered sludge, can save a large amount of fuel, reduce running cost.

4. high-temperature flue gas can be removed mud stink, non-secondary pollution.

5. mud can get into drying machine and not adhesion mutually with higher moisture.

6. granulation (bar) machine directly links to each other with drying machine can save handling equipment.

7. can reduce power consumption and equipment attrition than granulation under the high-moisture (bar).

8. screw rod extruder grain (bar) machine also plays the effect of mixing, fragmentation, even feeder and wind stopping device.

Accompanying drawing is the schema of this technology.

Claims

1. a sludge treatment technique that is suitable for solid waste is characterized in that: with WWT

The dewatered sludge of factory and part sludge-drying and a certain amount of mineral manure and auxiliary material are (dirty when using

During mud production composite fertilizer) in mixing machine, behind the mixing adjustment water ratio, add special continuously

In screw rod (can be single screw rod or twin screw) extruder grain (bar) machine (can be vertical or horizontal); (1) when the mud of extruding mutually during adhesion (water ratio is lower), screw extruder pelletizer can be adopted, when the mutual adhesion of the mud of extruding (water ratio is higher), screw rod extruding strip making machine (only needing that tablets press is exported revolving scraper unloads) can be adopted; The outlet of screw rod extruder grain (bar) machine directly links to each other with the inlet of revolving drum drier; The mud import of revolving drum drier is suitably increased; A part of high-temperature flue gas is imported wherein in the place near the outlet of screw rod extruder grain (bar) machine, and with mud arranged certain duration of contact in vertical direction; The outlet of screw rod extruding strip making machine is always downward;

When the mud bar has just been extruded, promptly contact with high-temperature flue gas, surface-moisture evaporates rapidly, makes the adhesion no longer mutually of mud bar, helps drying and dehydrating; After coming out from revolving drum drier, a part of dewatered sludge mixes with wet mud as returning charge, and another part dewatered sludge is sold as the fuel or the as fertilizer sources of oven dry mud; Through super-dry, the mud odorless, tasteless that becomes, wherein pathogenic micro-organism and parasitic ovum also are killed, and have realized innoxiously, and these processes just can be accomplished in a short period of time.