CN108249719A

CN108249719A - Deep sludge dewatering process

Info

Publication number: CN108249719A
Application number: CN201810199649.9A
Authority: CN
Inventors: 宋庭树; 杨玉云
Original assignee: Yixing Kailida Environmental Protection Equipment Co
Current assignee: Yixing Kailida Environmental Protection Equipment Co
Priority date: 2018-03-12
Filing date: 2018-03-12
Publication date: 2018-07-06

Abstract

The invention discloses a kind of deep sludge dewatering process, include the following steps：(1) modifying agent and catalyst are added into the sludge of moisture content 80 85%, is stirred and evenly mixed；(2) modified sludge is sent into deep sludge dehydrator, carries out low pressure, the processing of medium and high pressure filter-press dehydration successively.The present invention has the following advantages：Sludge after homogeneous is delivered in mixing reactor by sludge by the way that screw conveyor is quantitative, is quantitatively added sludge modification agent, catalyst, is sufficiently mixed under mechanical agitation.Modified sludge is delivered in deep sludge dehydrator by spiral quantitative and carries out extrusion dehydration, and so as to fulfill the deep dehydration of sludge, primary dewatering can be to moisture content below 60%.

Description

Deep sludge dewatering process

Technical field

The present invention relates to dewatering technology of mud technical field, especially a kind of deep sludge dewatering process.

Background technology

Sludge is the solid sediment matter as caused by water and sewage disposal process, and moisture content is high, up to more than 99%, Also containing nutritional ingredients such as a large amount of nitrogen, phosphorus, potassium for promoting plants and crop growth, fertilizer efficiency is preferable, can be with by compost treatment Achieve the purpose that stabilisation, innoxious and recycling.

But due to high organic content, easily degenerate smelly, and particle is thinner, and proportion is smaller, jelly liquid.It is Concentrated thing between liquid and solid can use pump transport, but it is difficult to carry out separation of solid and liquid by sedimentation.In addition sludge As composting material, it is desirable that the moisture content of raw material is less than 55%, could carry out aerobic decomposition, therefore sludge dewatering treatment is required 's.

And the operation of sludge dewatering at present, in the state of closed, the extruding of sheet frame is passed through by the sludge that high-pressure pump is squeezed into, The water in sludge is made to be discharged by filter cloth, reaches dehydration purpose；Dewatered moisture content of the cake is 65%~80%, and efficiency is low.

Invention content

It is easy to operate in view of the deficiencies of the prior art, the present invention proposes a kind of deep sludge dewatering process, sludge after processing Moisture content is to less than 60%.

In order to achieve the above-mentioned object of the invention, the present invention provides following technical scheme：A kind of deep sludge dewatering process, including Following steps：

(1) modifying agent and catalyst are added into the sludge of moisture content 80-85%, is stirred and evenly mixed；

(2) modified sludge is sent into deep sludge dehydrator, carries out low pressure, the processing of medium and high pressure filter-press dehydration successively.

Further, which is quick lime.

Further, which is ferric trichloride.

Further, which includes two sets of rolling mechanisms setting up and down, often covers rolling mechanism by one Strainer cycle, which is wrapped on multiple drum rolls, to be formed；Part drum roll below the rolling mechanism of top is above the rolling mechanism of lower part Part drum roll, two strainers contact at the part drum roll and are wrapped in jointly on the part drum roll；It rolls the part Pressure cylinder includes running wheel, guide wheel and the high pinch roller that strainer is wound successively, which is equipped with several, sets up two rows separately；Strainer The length between the high pinch roller of length more than the guide wheel and closely between the running wheel and the guide wheel.

Compared with prior art, the present invention has the following advantages：Sludge is quantitative by the dirt after homogeneous by screw conveyor Mud is delivered in mixing reactor, quantitatively adds sludge modification agent, catalyst, is sufficiently mixed under mechanical agitation.It is modified Sludge afterwards is delivered in deep sludge dehydrator by spiral quantitative and carries out extrusion dehydration, is taken off so as to fulfill the depth of sludge Water, primary dewatering can be to moisture content below 60%.

Description of the drawings

Fig. 1 is the structure diagram of deep sludge dehydrator in the present invention；

Diagram label：

Rolling mechanism under the upper rolling mechanisms of 1-, the upper strainers of 11-, 2-, 21- lower filter belts, 3- running wheels, 4- guide wheels, 5- high pinch rollers, The first liquid traps of 6-, the second liquid traps of 7-, 8- sludge, the dry clods of 9-.

Specific embodiment

With reference to embodiment, the present invention will be described in detail, the description of this part be only it is exemplary and explanatory, no Reply protection scope of the present invention has any restriction effect.

A kind of deep sludge dewatering process, includes the following steps：

Sludge after homogeneous is delivered in mixing reactor by sludge by the way that screw conveyor is quantitative, is quantitatively added sludge and is changed Property agent, catalyst, are sufficiently mixed under mechanical agitation.Modified sludge is delivered to sludge deep by spiral quantitative and takes off Extrusion dehydration is carried out in water dispenser.

Wherein, which is quick lime, solid particulate matter water is made to combine reason by conditioning and weakened, while make sludge knot Structure reaches homogeneous.By sludge conditioning, the cell wall based on protein is destroyed, discharges the combination water in sludge and absorption Water, intracellular water, overcomes sludge specific resistance, and sludge viscosity is greatly lowered, improves sludge dewatering effect；The catalyst is tri-chlorination Iron, enhances the dewatering of sludge, and the calcium carbonate granule structure of the calcium bicarbonate generation in quick lime and sewage can also increase dirt The porosity of mud promotes mud-water separation, is remarkably improved the dehydrating effect of sludge.Meanwhile the ferric trichloride and quick lime of addition Also heavy metal-passivated and deodorization and sterilization effect.

As shown in Figure 1, the deep sludge dehydrator includes upper rolling mechanism 1 and lower rolling mechanism 2, two rolling mechanisms are It is setting up and down；Upper rolling mechanism 1 by upper strainer 11 recycle wind several drum rolls form, lower rolling mechanism 2 is by lower filter belt 21 Cycle, which is wrapped on multiple drum rolls, to be formed.

Wherein, part drum roll of the part drum roll of upper 1 lower section of rolling mechanism for lower 2 top of rolling mechanism, that is, It says, which is shared by upper rolling mechanism 1 and lower rolling mechanism 2；Especially upper strainer 11 and lower filter belt 21 are at this It is bonded, and is wrapped in jointly on the part drum roll at the drum roll of part.

Since other than the part drum roll, upper strainer 11 and lower filter belt 21 are separated, therefore in upper strainer 11 under Before strainer 21 is bonded, toward addition sludge 8 between the two；Then upper strainer 11 and lower filter belt 21 are bonded and are rolled with part Cylinder contact so that the sludge being folded between strainer 11 and lower filter belt 21 is squeezed and torn, so as to be folded in sludge Water leaked out by strainer, by part drum roll handle after, sludge 8 is dehydrated into dry clod 9 and discharges.

The part drum roll includes running wheel 3, guide wheel 4 and the high pinch roller 5 that strainer is wound successively, which is equipped with several It is a, set up two rows separately；Strainer between the running wheel 3 and the guide wheel 4 length be more than the guide wheel 4 with closely the high pinch roller 5 it Between length.

By setting the spacing that various drum rolls are separated by the part drum roll so that this dehydration function carry out low pressure, in Pressure, the high pressure even a variety of press filtration areas of super-pressure, such as strainer longest between running wheel 3 and guide wheel 4, the active force being subject to is minimum, is low Press press filtration；Spacing is slightly long between guide wheel 4 and high pinch roller 5, and the active force being subject to is larger, is middle pressure press filtration.

And for high pinch roller 5, two rows structure is set as, strainer length between the high pinch roller 5 of two rows reduces, this makes It obtains pressure-filtering process and high pressure press filtration and super-pressure press filtration phenomenon occurs.

In conjunction with the size of setting running wheel 3, guide wheel 4 and high pinch roller 5：Running wheel diameter is more than the guide wheel, and the guide wheel diameter is big In the high pinch roller.Above-mentioned deeply dehydrating sludge, can so that sludge of the moisture content for 80-85% or so, through high-pressure compressing be dehydrated to Below moisture content 60%.

In this deep sludge dewatering process, strainer uses import special substance：Polyethylene terephthalate is made, tool Having that tensile strength is big, anti-fold power is strong, and wire side monofilament is uniform, suppleness is good, wear-resisting, acid and alkali-resistance, high temperature resistant, mud cake have disengaged from, The advantages that good water permeability.

This deep sludge dewatering process includes the first liquid trap 6, which is located at below the part drum roll.

Further, this deep sludge dewatering process includes the second liquid trap 7, which is located at lower roller press The lower section of structure 2.

There are following technological merits for this belt Deep dehydration technique：

1st, system operatio is simple, stablize, continuous operation is at low cost, speed of filter pressing is fast, without blocking；

2nd, dewatered mud cake is met water and is not dissolved, and stability is good, non-secondary pollution.

3rd, have a wide range of application, suitable for municipal sludge, pharmacy, food processing, petrochemical industry, wine brewing, process hides, printing and dyeing, papermaking, coal The industries such as chemical industry.

4th, have continuous operation, reliable and stable, treatment effeciency is high, low power consumption and other advantages.

The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should It is considered as protection scope of the present invention.

Claims

1. a kind of deep sludge dewatering process, it is characterised in that：Include the following steps：

2. deep sludge dewatering process as described in claim 1, it is characterised in that：The modifying agent is quick lime.

3. deep sludge dewatering process as described in claim 1, it is characterised in that：The catalyst is ferric trichloride.

4. deep sludge dewatering process as described in claim 1, it is characterised in that：The deep sludge dehydrator includes setting up and down Two sets of rolling mechanisms, often cover rolling mechanism and be wrapped on multiple drum rolls and formed by strainer cycle；Under the rolling mechanism of top The part drum roll of side is the part drum roll above the rolling mechanism of lower part, and two strainers are contacted and are total at the part drum roll It is same to be wrapped on the part drum roll；The part drum roll includes running wheel, guide wheel and the high pinch roller that strainer is wound successively, the high pressure Wheel is equipped with several, sets up two rows separately；Strainer length between the running wheel and the guide wheel is more than the guide wheel and the height closely Length between pinch roller.