CN112028436A

CN112028436A - Sludge reduction method and equipment

Info

Publication number: CN112028436A
Application number: CN202010729897.7A
Authority: CN
Inventors: 曹红杰
Original assignee: Jiangsu Ruoshan Environmental Design Co ltd
Current assignee: Jiangsu Ruoshan Environmental Design Co ltd
Priority date: 2020-07-27
Filing date: 2020-07-27
Publication date: 2020-12-04

Abstract

The invention discloses a sludge reduction method and equipment. The method comprises the following steps: firstly, transferring sludge to a first accommodating space; secondly, pretreating the sludge in the first accommodating space; and thirdly, transferring the sludge in the first accommodating space to a second accommodating space, wherein the sludge can cover the upper surface of the filler, and water in the sludge can flow downwards along the filler to realize the separation of solid and water in the sludge.

Description

Sludge reduction method and equipment

Technical Field

The invention relates to an environment treatment technology.

Background

Domestic sludge or industrial sludge, especially industrial sludge, contains chemical components in sewage and belongs to solid organic waste with high water content.

According to the prior art, the treatment of the sludge generally comprises front-end pretreatment and terminal treatment, the conventional sludge pretreatment is mainly to perform stabilization and solidification treatment, but the sludge with too high water content is directly subjected to stabilization and solidification treatment, a large amount of medicaments are inevitably consumed, and resource waste is caused.

No matter what kind of terminal disposal technology is adopted, the key point of the technology lies in that how the front-end pretreatment can simply, efficiently and energy-saving remove water in the sludge, so that the raw materials adapt to the final disposal requirement.

Disclosure of Invention

The technical problems solved by the invention are as follows: the water content of the sludge is reduced.

In order to solve the technical problems, the invention provides the following technical scheme: a sludge reduction method comprises the following steps: firstly, transferring sludge to a first accommodating space; secondly, pretreating the sludge in the first accommodating space; thirdly, transferring the sludge in the first accommodating space to a second accommodating space, and dehydrating the sludge by the second accommodating space; the second accommodating space is filled with the filler, the upper surface of the filler can be covered by sludge, and water in the sludge can flow downwards along the filler.

If the sludge treatment process is divided into front-end pretreatment and terminal treatment, the sludge reduction method belongs to front-end pretreatment.

The sludge is pretreated in the first accommodating space, the pretreatment has the main content that the sludge is fully dissolved, and the dissolved sludge is pumped to the second accommodating space like fluid. In the second accommodating space, the solid in the sludge is blocked on the upper surface of the filler by the filler, and the water in the sludge flows downwards along the filler, so that the separation of the solid and the water in the sludge is realized, namely, the solid staying on the upper surface of the filler is dry sludge. Wherein the dry sludge is not pure dry goods, but contains certain moisture.

The invention does not directly convey the sludge to the second accommodating space, but conveys the sludge to the first accommodating space firstly, and conveys the sludge to the second accommodating space after pretreatment, and the reason is that: if the sludge is directly conveyed to the second accommodating space, water in the sludge is difficult to separate from solids in the sludge and flows down along the filler because the sludge is not sufficiently dissolved; and the pretreated sludge has the advantages that because tiny solids in the sludge are fully dissolved in water, water can infiltrate into the filler under the condition of no resistance or small resistance, so that the effective dehydration of the sludge is realized, the dehydration rate of the sludge is improved, and the water content of the sludge is reduced.

If the sludge is buried, because the landfill resources are limited and the landfill pollution control standard is stricter and stricter, the environment can be directly influenced by the improper treatment of the percolate during the direct landfill, therefore, the water content of the sludge is reduced by the dehydration treatment at the front end of the sludge, the landfill resources can be saved, and the secondary pollution is avoided.

If carry out incineration treatment to mud, because mud burns and requires 40% of moisture content, simultaneously, because the low inevitable combustion efficiency that influences of mud calorific value even influences the stability of burning furnace or pyrolysis gasifier furnace body whole operation, handle improperly, probably cause secondary pollution. Therefore, the water content of the sludge is reduced by dewatering the front end of the sludge, so that the incineration treatment can be smoothly carried out, and secondary pollution is avoided.

The sludge reduction method can simply, efficiently and energy-efficiently remove water in the sludge, so that the sludge is suitable for the final treatment requirement.

The sludge reduction equipment designed according to the sludge reduction method comprises a first accommodating space, a second accommodating space and a suction device arranged between the first accommodating space and the second accommodating space, wherein the second accommodating space is filled with a filler, the sludge can cover the upper surface of the filler, and water in the sludge can flow downwards along the filler.

Drawings

The invention is further described below with reference to the accompanying drawings:

FIG. 1 is a schematic view of a sludge reducing apparatus according to the present invention viewed from above;

fig. 2 is a sectional view taken along line a-a of fig. 1.

The symbols in the drawings illustrate that:

10. a first accommodating space; 20. a second accommodating space; 21. an aquatic plant; 30. a filler; 31. solid fillers; 32. ceramsite; 40. a suction device; 50. a river channel; 51. revetment; 60. and (4) sludge.

Detailed Description

Referring to fig. 1 and 2, a sludge reduction method includes the following steps: first, the sludge is transferred to the first accommodation space 10; secondly, pretreating the sludge in the first accommodating space; thirdly, transferring the sludge in the first accommodating space to a second accommodating space 20, and dehydrating the sludge in the second accommodating space; the second containing space is filled with the filler 30, the upper surface of the filler can be covered by sludge, and water in the sludge can flow downwards along the filler.

The sludge is pretreated in the first receiving space 10, which differs from the front-end pretreatment in the sludge treatment process, the main content of which is to dissolve the sludge sufficiently, and the dissolved sludge is pumped to the second receiving space 20 as a fluid. In the second containing space, the solid in the sludge is blocked on the upper surface of the filler by the filler 30, and the water in the sludge flows down along the filler, so that the separation of the solid from the water in the sludge is realized.

The pre-treatment of the sludge in the first receiving space 10 is mainly carried out in such a way that the sludge is sufficiently dissolved, and the measures taken may be adding water to the first receiving space and the disturbance of the sludge in the first receiving space by an operator using a tool (a simple tool such as a hoe). In addition, the pre-treatment also includes the cleaning of the waste, such as plastic, metal, stone, which the operator can use to take out from the first containing space 10, providing conditions for the sludge in the first containing space 10 to be extracted to the second containing space 20.

After the pretreatment, the water content of the sludge in the first accommodating space 10 is 80-90%, so that the sludge can be fully dissolved; a suction device 40 is disposed between the first and second accommodating spaces 20, and the suction device can draw the sludge in the first accommodating space into the second accommodating space. The pumping device 40 can be a pump commonly used in the prior art, the water content of the sludge is 80% -90%, and a precondition is provided for the pumping device 40 to pump the sludge in the first accommodating space 10 into the second accommodating space 20.

As shown in fig. 2, the filler 30 is composed of a plurality of particles, and water in the sludge can flow down along the particles and gaps between the particles, and the particles are solid matters such as stones; alternatively, the water in the sludge can flow down the interstices of the particulate matter itself, such as ceramsite.

Alternatively, the filler 30 comprises a plurality of layers of particles, the plurality of layers of particles are arranged up and down, and water in the sludge flows down along gaps among particles at the uppermost layer and then flows down along gaps among particles at the lower layer and gaps among the particles at the lower layer; the lower layer of particles can be of a multilayer structure and are all located below the particles on the uppermost layer. The particles at the uppermost layer are solid matters, namely solid fillers 31, and the sludge covers the solid matters; if the uppermost layer of particles is hollow, similar to the ceramsite 32, the particles themselves have smaller gaps than the gaps between the solid, and are easily blocked by the sludge, so that the water flow passage in the sludge is blocked.

Preferably, the first receiving space 10 is a pond disposed on the land, and the second receiving space 20 is a wetland disposed on the land.

In practical operation, the first accommodating space 10 is a pond arranged beside a river channel, the second accommodating space 20 is a wetland arranged beside the pond, and an operator digs sludge in the river channel into the pond by using a tool to pretreat the sludge in the pond. The suction device 40 is then activated to draw the sludge in the pond into the wetland. The sludge covering the upper surface of the wetland is dehydrated under the action of the filler 30. The microorganisms in the wetland can purify the sludge and the sewage in the sludge, and the wetland is exposed to the sun, so that the moisture content of the sludge is easy to evaporate, the moisture content of the sludge is further reduced, and the treatment is pollution-free. After the sludge is dewatered, the operator may transfer the sludge to a transport vehicle, such as a truck, with a tool, and transport the sludge from the transport vehicle to a predetermined point of end-use disposal.

The wetland may be partially filled with the filler 30, and partially with the wetland in a general sense, for example, as shown in fig. 1, water from sludge filtered by the filler 30 may flow to a place where the filler 30 is not filled, and the water may be purified by the aquatic plants and microorganisms contained in the wetland. The wetland design is environmentally friendly, energy efficient and effective for the treatment of pollutants from sludge.

Referring to fig. 1 and 2, the sludge reduction apparatus designed according to the above sludge reduction method includes a first receiving space 10, a second receiving space 20, and a suction device 40 disposed between the first receiving space and the second receiving space, wherein the second receiving space is filled with a packing 30, the upper surface of the packing is covered with sludge, and water in the sludge can flow down along the packing. Preferably, the second receiving space 20 is a wetland arranged on the land.

The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description herein, since various changes and modifications can be made in the details of the embodiment and the application range according to the spirit of the present invention.

Claims

1. A sludge reduction method comprises the following steps: firstly, transferring the sludge to a first containment space (10); secondly, pretreating the sludge in the first accommodating space; thirdly, transferring the sludge in the first accommodating space to a second accommodating space (20), and dehydrating the sludge in the second accommodating space; the method is characterized in that: the second containing space is filled with a filler (30), the upper surface of the filler can be covered by sludge, and water in the sludge can flow downwards along the filler.

2. The method for sludge reduction according to claim 1, wherein: the packing (30) is composed of a plurality of particles, and water in the sludge can flow down along the particles and gaps between the particles, or can flow down along the gaps of the particles themselves.

3. The method for sludge reduction according to claim 2, wherein: the filler (30) comprises a plurality of layers of particles which are arranged up and down, and water in the sludge flows down along gaps among particles at the uppermost layer and then flows down along gaps among particles at the lower layer and gaps among the particles at the lower layer; the lower layer of particles are positioned below the uppermost layer of particles.

4. The method for sludge reduction according to claim 1, wherein: the second accommodating space (20) is a wetland arranged on land.

5. The method for sludge reduction according to claim 1 or 4, wherein: the first accommodation space (10) is a pond arranged on land.

6. The method for sludge reduction according to claim 1, wherein: after the pretreatment, the water content of the sludge in the first accommodating space (10) is 80-90%; a suction device (40) is arranged between the first accommodating space and the second accommodating space (20), and the suction device can suck the sludge in the first accommodating space into the second accommodating space.

7. The utility model provides a sludge reduction equipment, includes first accommodation space (10), second accommodation space (20), sets up suction device (40) between first accommodation space and second accommodation space, and the second accommodation space intussuseption is filled with filler (30), and mud can cover on the filler upper surface, and the water in the mud can follow the filler and flow down.