CN101948232A

CN101948232A - Sludge treatment method

Info

Publication number: CN101948232A
Application number: CN 201010298729
Authority: CN
Inventors: 黄杨
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-09-30
Filing date: 2010-09-30
Publication date: 2011-01-19

Abstract

The invention relates to a sludge treatment method. The method comprises the following steps of: (1) adding 0.3 to 5 mass percent of fibrous materials and 0.3 to 3 mass percent of alkali powder into sludge and mixing; (2) pouring the sludge after mixing into a diaphragm plate frame and performing filter pressing to remove part of water from the sludge; (3) pouring water into a diaphragm of the diaphragm plate frame to further remove the water from the sludge; and (4) blowing air to the diaphragm plate frame to remove the residual water from the diaphragm plate frame and taking the treated sludge out, wherein the water content of the sludge is below 40 percent. 0.1 to 5 mass percent of fly ash and/or 0.01 to 0.5 mass percent of polyacrylamide can also be added in the step (1). The sludge treatment method is suitable for sludge treatment in sewage treatment plants.

Description

A kind of method for sludge treatment

Technical field

The present invention relates to a kind of method for sludge treatment, particularly a kind of treatment process of utilizing filamentary material and alkaline powder to remove the moisture in the mud.

Background technology

The sewage of sewage work comprises sanitary sewage, dyeing and printing sewage, papermaking wastewater, industrial sewage and chemical engineering sewage etc., so organic poison that from sewage work's sludge discharged, contains organism relic, bacterium thalline, inorganic particle, colloid, microorganism, parasite (ovum) heavy metal and be difficult to resolve, even after handling, water ratio in the mud is still about 70-90%, thereby the subsequent disposal of mud seems very difficult.At present, in order to handle this type of mud, lot of domestic and international professional person tries every possible means, and topmost way is that mud is carried out landfill, stacks, jettisons ocean, burning, compost treatment etc.But along with the manufacturing fast development of China with to the improving constantly of the requirement of the overall treatment of resident living sewage, will exist the sludge discharge about 2.5 hundred million tons every year.Though it is simple that landfill, stacking method are handled, and needs a large amount of soils, and can cause serious secondary pollution, consequence is quite serious; Jettison the ocean and then can endanger marine ecology and human plant chain; And, then obviously have problems such as facility investment is big, energy consumption is many, environmental pollution for burning and mud oven dry processing.

Summary of the invention

In order to solve the aforementioned problems in the prior, the invention provides the cost that can reduce sewage work's processing mud and can save a large amount of energy again, reduce a kind of method for sludge treatment of environmental pollution.

The technical solution used in the present invention is: a kind of method for sludge treatment, and it may further comprise the steps: (1) adds filamentary material and the mass percent that mass percent is 0.3-5% in mud be the alkaline powder of 0.3-3%, mixes to make it even; (2) mud after the use sludge pump will mix injects in the barrier film sheet frame and carries out press filtration, removes the part moisture in the mud, preferably selects the autoclave diaphragm frame in press filtration, and the moisture in the mud can drop to below 50%; (3) use water pump water filling in the barrier film of barrier film sheet frame, further remove the moisture in the mud, the moisture in the mud can drop to about 40%; (4) to barrier film sheet frame purging air, remove the residual moisture in the barrier film sheet frame, can take out mud after the processing for subsequent applications.

Further, in step (1), filamentary material comprises wood chip, pulverizes balloonflower root, pulverizes straw, pulverizes straw, pulverizes rice husk etc.; Alkaline powder can be calcium oxide, calcium hydroxide etc.

Preferably, in step (1), can add the flyash that mass percent is 0.1-5%, help removing better moisture.

Preferably, in step (1), also can further add the polyacrylamide that mass percent is 0.01-0.5%, this component also can play active effect to the moisture removal in the mud.

Like this, the moisture content in the mud can be reduced to lowlyer, the moisture in the mud after the processing can drop to below 40% or 40%.

Further, in step (2), annotating mud pressure is 0.6-1.5MPa.

Again further, in step (3), water injection pressure is 0.6-2.5MPa.

Compared with prior art, the present invention has the following advantages: the invention provides and a kind of filamentary materials such as wood chip, balloonflower root and alkaline powder are added in the mud, make mud after treatment have the highly method for sludge treatment of using value, not only with pile up like a mountain and reluctant mud is turned waste into wealth, and solved current rural area balloonflower root, rice bar, straw etc. burning and the serious air pollution problems inherent that causes has not only been saved ample resources but also reached environmental requirement; In addition, method for sludge treatment provided by the present invention has also reduced the processing cost of sewage work, and technology is simple, and is easy and simple to handle.

Embodiment

Below in conjunction with accompanying drawing preferred embodiment of the present invention is described in detail, thereby protection scope of the present invention is made more explicit defining so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that.

Embodiment one:

Water ratio in sewage work is in the mud of 70-95%, and adding mass percent is the wood chip of 0.3-3% and the calcium hydroxide of 0.3-2%, and high-speed stirring, and rotating speed is greater than 50 rev/mins; Mud after will stirring under the pressure of 0.6-1.5MPa by sludge pump is sent into and is carried out press filtration in the sheet frame, selects the autoclave diaphragm sheet frame during press filtration for use, has removed the most of moisture in the mud; In order further to remove moisture, adopt high-pressure pump water filling in the barrier film in the barrier film sheet frame under the pressure of 0.6-2.5MPa; Then, to the continuous purging air of sheet frame, the residuary water in the sheet frame is further dried up, recording the moisture content of being handled in the mud of back is 43%.

Embodiment two:

Water ratio in sewage work is in the mud of 70-95%, and adding mass percent is the wood chip of 0.3-5%, adds the flyash of 0.1-5% and the calcium hydroxide of 0.3-2% then, and high-speed stirring, and rotating speed is greater than 50 rev/mins; Mud after will stirring under the pressure of 0.6-1.5MPa by sludge pump is sent into and is carried out press filtration in the sheet frame, selects the autoclave diaphragm sheet frame during press filtration for use, has removed the most of moisture in the mud; In order further to remove moisture, adopt high-pressure pump water filling in the barrier film in the barrier film sheet frame under the pressure of 0.6-2.5MPa; Then, to the continuous purging air of sheet frame, the residuary water in the sheet frame is further dried up, the moisture content that records in the gained mud is 39%.

Embodiment three:

Water ratio in sewage work is in the mud of 97-99%, adds mass percent and is balloonflower root after the pulverizing of 0.3-4% and the calcium oxide of 0.3-2%, and stir, and rotating speed is less than 50 rev/mins; Mud after will stirring under the pressure of 0.6-1.5MPa by sludge pump is sent into and is carried out press filtration in the sheet frame, selects the autoclave diaphragm sheet frame during press filtration for use, has removed the most of moisture in the mud; In order further to remove moisture, adopt high-pressure pump water filling in the barrier film in the barrier film sheet frame under the pressure of 0.6-2.5MPa; Then, to the continuous purging air of sheet frame, the residuary water in the sheet frame is further dried up, the moisture content that records in the gained mud is 40%.

Embodiment four:

Water ratio in sewage work is in the mud of 97-99%, add mass percent and be the balloonflower root after the pulverizing of 0.5-5%, add the flyash of 0.5-5% and the calcium oxide of 0.3-3% again, other adds the polyacrylamide of 0.01-0.5%, and stir, rotating speed is less than 50 rev/mins; Mud after will stirring under the pressure of 0.6-1.5MPa by sludge pump is sent into and is carried out press filtration in the sheet frame, selects the autoclave diaphragm sheet frame during press filtration for use, has removed the most of moisture in the mud; In order further to remove moisture, adopt high-pressure pump water filling in the barrier film in the barrier film sheet frame under the pressure of 0.6-2.5MPa; Then, to the continuous purging air of sheet frame, the residuary water in the sheet frame is further dried up, the moisture content that records in the gained mud is 36%.

Adopt treatment process of the present invention, through the final moisture of handling the mud in the resulting sheet frame can reach about 40% and below, ash is below 28%, fugitive constituent is about 40%, thermal value is stuck in greatly more than 2500 kcal/kg, can directly be sent to coal firing boiler and burn, in burning, can eliminate the pollution of all kinds of pathogenic microorganisms, parasite and toxic organic compound fully.The difference of sheet frame capacity causes mud volume different, and general water content is the mud below 40%, about each mud extraction 0.1-10 ton.Lime-ash or the powder ash that is produced after this sludge incineration directly can be sent to cement mill system cement or the brickmaking of brickmaking factory, and be applied in other building materials projects, thereby utilize the calorific value energy of mud itself and reduced environmental pollution.

More than specific embodiment of the present invention is illustrated; but protection content of the present invention is not only limited to above embodiment, in affiliated technical field of the present invention, and the common knowledge of a GPRS; just can in its technology main idea scope, carry out diversified change.

Claims

1. method for sludge treatment is characterized in that it may further comprise the steps:

(1) adding mass percent in mud is that filamentary material and the mass percent of 0.3-5% is the alkaline powder of 0.3-3%, mixes;

(2) with carrying out press filtration in the injection of the mud after mixing in the step (1) the barrier film sheet frame, remove the part moisture in the mud;

(3) moisture in the mud is further removed in water filling in the barrier film of the barrier film sheet frame described in the step (2);

(4) to the barrier film sheet frame purging air described in the step (3), remove the residual moisture in the described barrier film sheet frame, take out the mud after handling.

2. a kind of method for sludge treatment according to claim 1 is characterized in that: in described step (1), described filamentary material comprises wood chip, pulverizes balloonflower root, pulverizes straw, pulverizes straw, pulverizes rice husk.

3. a kind of method for sludge treatment according to claim 1 is characterized in that: in described step (1), also be added with the flyash that mass percent is 0.1-5%.

4. a kind of method for sludge treatment according to claim 3 is characterized in that: in described step (1), also be added with the polyacrylamide that mass percent is 0.01-0.5%.

5. according to each described a kind of method for sludge treatment of claim 1-4, it is characterized in that: in described step (2), annotating mud pressure is 0.6-1.5MPa.

6. according to each described a kind of method for sludge treatment of claim 1-4, it is characterized in that: in described step (3), water injection pressure is 0.6-2.5MPa.