CN111675456B - Device and method for preparing covering soil of landfill from sludge - Google Patents

Device and method for preparing covering soil of landfill from sludge Download PDF

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Publication number
CN111675456B
CN111675456B CN202010532299.0A CN202010532299A CN111675456B CN 111675456 B CN111675456 B CN 111675456B CN 202010532299 A CN202010532299 A CN 202010532299A CN 111675456 B CN111675456 B CN 111675456B
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sludge
reaction tank
drying
landfill
compression
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CN111675456A (en
Inventor
陈柏校
夏玉坤
王成
洪根惠
沈飞凯
李林
金喆浩
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Hangzhou Guotai Environmental Protection Technology Co Ltd
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Hangzhou Guotai Environmental Protection Technology Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/004Sludge detoxification
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/06Treatment of sludge; Devices therefor by oxidation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/14Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
    • C02F11/143Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using inorganic substances

Abstract

The invention relates to equipment for manufacturing covering soil of a landfill site by sludge, which comprises a sludge dewatering part, a first reaction tank, a second reaction tank and a sludge drying part, wherein the sludge dewatering part, the first reaction tank, the second reaction tank and the sludge drying part are communicated through pipelines. The method for preparing the covering soil of the landfill by the sludge is characterized in that the sludge is subjected to distribution treatment through four parts, and the sludge is subjected to primary dehydration, disinfection and sterilization, dehydration, drying and other operations. The device and the use method not only broaden the application way of the sludge subjected to anaerobic digestion, but also effectively utilize the muck, reduce the ecological damage caused by abandonment of the muck and have the advantage of changing waste into valuable.

Description

Device and method for preparing covering soil of landfill from sludge
Technical Field
The invention relates to the technical field of sludge treatment and recovery, in particular to equipment and a method for preparing covering soil of a landfill by using sludge.
Background
Sludge is an extremely complex heterogeneous body with high water content, which is composed of organic matters, bacteria, inorganic particles, colloids and the like, and is mostly generated when municipal wastewater and factory wastewater are treated. With the development of cities, the sludge yield is increased. Sludge treatment is a process of performing reduction, stabilization and innocent treatment on sludge, wherein reducing the water content of the sludge is an important method for making the sludge harmless.
At present, domestic sewage plants rarely have sludge disposal facilities meeting national standards. The safe disposal rate of the sludge is less than 10 percent, and the random littering phenomenon of the sludge which is not subjected to harmless treatment is serious. Since the sludge usually contains considerable amounts of harmful substances (such as parasitic eggs, pathogenic microorganisms, heavy metals) and unstabilized organic substances, and is often accompanied by malodors, direct or potential environmental pollution may result if the sludge is not properly treated and disposed of.
When the domestic garbage landfill site operates according to the sanitary landfill process standard, a large amount of covering materials are needed to timely cover the surface of the garbage, so that the garbage is prevented from directly contacting the environment. The covering effect is shown in that the infiltration of surface water is reduced, the uncontrolled outward diffusion of landfill gas is avoided, the sensory aversion is reduced, the breeding of small animals or bacteria is avoided, the driving of landfill operation equipment and vehicles is facilitated, and meanwhile, soil is provided for the growth of vegetation.
Patent publication No. CN104129900 discloses a method for making covering soil of a refuse landfill by using primary sludge, wherein the dry covering soil is air-dried, the time consumption is more, and aiming at the dehydration and drying operations of the sludge, a high-pressure elastic presser is used for mechanical filter pressing dehydration treatment to obtain mud cakes, the mud cakes are required to be crushed, and the process is complicated and time-consuming.
Disclosure of Invention
In view of the defects in the prior art, the invention relates to equipment for manufacturing covering soil of a landfill site by using sludge and a using method thereof.
The invention relates to equipment for manufacturing covering soil of a landfill site by sludge, which comprises a sludge dewatering part, a first reaction tank, a second reaction tank and a sludge drying part, wherein the sludge dewatering part, the first reaction tank, the second reaction tank and the sludge drying part are communicated through pipelines;
the sludge dewatering part comprises a sludge dewatering shell, a sludge compression bin and a sludge sump, wherein the sludge compression bin is positioned in the center of the sludge dewatering shell and is fixed at the bottom of the sludge dewatering shell through a support frame, a compression plate is arranged in the sludge compression bin, a telescopic column is arranged between the compression plate and the top of the sludge dewatering shell, a one-way water filtering hole is arranged between the compression plate and the edge of the inner wall of the sludge compression bin, a sludge discharge port is arranged at the bottom of the sludge compression bin and is communicated with the first reaction tank through a sludge pipe, a sludge inlet is arranged on the side body of the sludge compression bin, a flow overflow port is arranged between the top of the sludge dewatering shell and the top of the sludge compression bin and drains water to the sludge sump, the sludge sump is positioned between the sludge dewatering shell and the upper part of the sludge compression bin, a water outlet is arranged at the top of the sludge sump, a sewage draining outlet is formed in the bottom of the sludge water bin;
The bottom of the first reaction tank and the top of the second reaction tank are provided with one-way valves, the bottom of the second reaction tank is communicated with a sludge drying part, and a sludge suction device is arranged at the communication part of the sludge drying part and the bottom of the second reaction tank;
the sludge drying part comprises a sludge drying shell, a rotating shaft, a spiral drying plate and a landfill soil outlet, the spiral drying plate is abutted to the inner wall of the drying part shell, and the spiral drying plate rotates by taking the rotating shaft as a center.
Through adopting above-mentioned scheme, distribute the processing with mud, carry out operations such as preliminary dehydration, disinfection and isolation, dehydration, drying to it, equipment is with whole implementation step integration operation, has reduced occupation of land space and operating time.
Further, the sludge compression bin body is of a cylindrical structure, and the bottom of the sludge compression bin is of a conical structure.
By adopting the scheme, the cylindrical structure has no corner, the water is conveniently separated during compression, and the sludge discharged and separated from the water has smaller resistance due to the bottom of the conical structure.
Furthermore, a regulating valve is arranged at a sludge inlet of the sludge compression bin, and a sludge suction valve is arranged on the sludge pipe.
By adopting the scheme, the regulating valve is used for regulating the speed and dosage of sludge introduction and stopping in time.
Furthermore, a mud valve is arranged at the bottom of the sludge compression bin.
By adopting the scheme, the mud blocking valve is used for blocking the sludge which is not dewatered from flowing out of the bottom of the sludge compression bin.
Furthermore, the bottom of the first reaction tank and the second reaction tank are provided with filler bins, and the filler bins can be set to be the weight of fillers.
Through adopting above-mentioned scheme, through the load of microcontroller control filler storehouse exit, the automatic filler that realizes uses manpower sparingly, only need set for in advance the weight proportion of accounting for mud in the reaction tank can.
The invention relates to an operation method for preparing landfill covering soil by sludge, which is equipment for preparing the landfill covering soil by using the sludge and comprises the following operation steps:
s1, adding original sludge into a sludge compression bin through a sludge inlet, compressing the sludge in the sludge compression bin through a compression plate to realize primary sludge-water separation, wherein when the compression plate is compressed downwards, water flows out of a one-way water filtering hole at the edge of the compression plate, the compression plate contracts upwards, and the water flows into a sludge water bin from an overflow port;
s2, after the sludge is primarily separated, opening a mud blocking valve to pump the residual sludge into a first reaction tank, adding an oxidation sterilizing agent for sterilization, and adding iron salt to destroy cell walls for 1-2 d;
S3, introducing the completely reacted sterile mud into a second reaction tank, and adding a dehydrating agent and a sludge conditioner for 6-8 d;
s4, sucking the treated mud into a mud drying shell, drying and stirring the wet mud through the rotation of a spiral drying plate, and discharging the wet mud as dry covering soil;
and S5, placing the film for 1-2 days outdoors, and completely drying the film in the air to be used for covering a landfill.
By adopting the scheme, the sludge is recycled into the landfill soil which can be used for landfill, the sludge is recycled, and the waste of resources and the pollution to the environment are saved.
Furthermore, the addition amount of the oxidation sterilizing agent is 3-5% of the weight of the sludge.
By adopting the scheme, the sludge deodorization device is used for killing parasitic ova, pathogenic microorganisms and the like in the sludge, so that peculiar smell is reduced.
Further, the addition amount of the iron salt is 10% of the weight of the sludge.
Through adopting above-mentioned scheme, throw in the mud through adding the iron chloride solution and add and take part in the broken cell wall reaction with concentrated sludge stirring, prevent that mud from carrying out secondary pollution, promote intracellular water release and mud microparticle reunion simultaneously, thoroughly change the nature of the high water-retaining capacity of mud, promote the separation of mud moisture and chemical substance and provide intensity.
Furthermore, the addition amount of the dehydrating agent is 15-25% of the weight of the sludge.
By adopting the scheme, the dehydrating agent further dehydrates the wet mud.
Further, the sludge conditioner is a magnesium gel conditioner, and the addition amount of the magnesium gel conditioner is 20% of the weight of the sludge.
By adopting the scheme, the sludge is improved by adding the conditioner to form a skeleton structure.
Drawings
The invention is further illustrated by the following examples in conjunction with the drawings.
Fig. 1 is a schematic structural diagram of an apparatus according to an embodiment of the present invention.
Fig. 2 is a flow chart of the operation of the apparatus of an embodiment of the present invention.
Reference numeral, 1-a sludge dewatering section; 11-sludge dewatering shell; 12-sludge compression bin; 121-a compression plate; 122-sludge inlet; 13-sludge sump; 131-a water outlet; 132-a sewage draining outlet; 14-a support frame; 15-telescopic column; 16-one-way water filtering holes; 17-sludge discharge port; 171-a mud valve; 18-flow overflow; 2-a first reaction tank; 21-sludge pipe; 211-a suction dredge valve; 22-a filler bin; 3-a second reaction tank; 4-sludge drying part; 41-sludge drying shell; 42-a rotating shaft; 43-spiral drying plate; 44-a landfill sand outlet; 45-a mud sucking valve; 5-adjusting valve.
Detailed Description
While the embodiments of the present invention will be described and illustrated in detail with reference to the accompanying drawings, it is to be understood that the invention is not limited to the specific embodiments disclosed, but is intended to cover various modifications, equivalents, and alternatives falling within the scope of the invention as defined by the appended claims.
For the convenience of understanding the embodiments of the present invention, the following detailed description will be given by way of example with reference to the accompanying drawings, and the embodiments are not limited to the embodiments of the present invention.
Embodiment 1 of the present invention, as shown in fig. 1 and 2, the present invention relates to an apparatus and method for manufacturing landfill covering soil using sludge, the apparatus comprising: the device comprises a sludge dewatering part 1, a first reaction tank 2, a second reaction tank 3 and a sludge drying part 4, wherein the sludge dewatering part 1, the first reaction tank 2, the second reaction tank 3 and the sludge drying part 4 are communicated through pipelines. The sludge dewatering part 1 is used for primary dewatering separation of sludge and removing more water in the sludge, and the sludge dewatering part 1 comprises a sludge dewatering shell 11, a cylindrical sludge compression bin 12 positioned in the sludge dewatering shell 11, a support frame 14 supporting the sludge compression bin 12 and a sludge water bin 13 storing and separating out sewage. The sludge water bin 13 is positioned at the middle upper part of the sludge compression bin 12, and the support frame 14 is positioned at the bottom of the sludge compression bin 12. The side of the sludge compression bin 12 is provided with a sludge inlet 122 for pinching and guiding sludge into the sludge compression bin 12, and a pipeline where the sludge inlet 122 is located is provided with an adjusting valve 5 for adjusting the sludge inlet amount. The bottom of the sludge compression bin 12 is provided with a sludge outlet 17, the sludge outlet 17 is provided with a sludge blocking valve 171, the sludge outlet 17 guides sludge into the first reaction tank 2 through a sludge pipe 21, and the sludge pipe 21 is provided with a sludge suction valve 211 for sucking sludge into the first reaction tank 2. The top of the sludge compression bin 12 is communicated with the sludge water bin 13, the edge of the top of the sludge compression bin 12 is provided with a flow overflow port 18, a compression plate 121 capable of stretching up and down is arranged in the sludge compression bin 12, and the compression plate 121 is fixedly connected with the top of the sludge dewatering shell 11 through a telescopic column 15. Compression board 121 and the 12 inner wall edges in mud compression storehouse are provided with one-way drainage hole 16, work as when compression board 121 pushes down mud, water is followed one-way drainage hole 16 flows to compression board 121 top, and when flexible post 15 contracts, compression board 121 takes water to move upwards, flows into mud sump 13 through overflow mouth 18, mud sump top is provided with outlet 131, and the bottom is provided with 132 drain.
The first reaction tank 2 is used for sterilization, sludge can generate pungent smell due to the existence of bacteria and worm eggs after being placed for a long time, and therefore the sludge needs to be sterilized and disinfected and cell wall is damaged, and secondary pollution is prevented. The second reaction tank 3 is used for further dehydration and the reaction gradually becomes a covering soil structure. The bottom of the side body of the first reaction tank 2 is communicated with the top of the side body of the second reaction tank 3, a valve is arranged between the bottom of the side body of the first reaction tank and the top of the side body of the second reaction tank, the upper structure and the lower structure reduce the use of energy, the transfer of sludge can be realized without power transmission, and the sludge is transferred under the action of gravity. First reaction tank 2 and 3 tops of second reaction tank are provided with filler storehouse 22, filler storehouse 22 is an intelligent filler device, contains parameter setting screen and microprocessor in, can add the batching automatically through the shared proportion of the shared reaction tank of manual setting mud, and is automatic convenient quick. The bottom of the second reaction tank 3 is provided with a sludge suction device 45 for guiding the reacted sludge into a sludge drying shell 41 in the sludge drying part 4.
Sludge drying portion 4 includes sludge drying casing 41, draw together sludge drying casing 41 and be the cylindricality tubular structure, central authorities are provided with pivot 42, be provided with spiral drying plate 43 that the spiral coiled in the pivot 42, be provided with the heating plate on the spiral drying plate 43, it is rotatory to drive spiral drying plate 43 through pivot 42, conveys sludge from sludge drying casing 41 entry end to other end landfill husky export 44 department and accomplishes the drying, spiral drying plate 43 offsets with sludge drying casing 41 inner wall, scrapes attached silt down and conveys on the inner wall.
The sludge subjected to anaerobic digestion is improved by building muck, the limit requirement of using the sludge as a covering additive of a refuse landfill in sludge disposal mixed landfill for urban sewage treatment plants (GB/T23485-2009) is met, the application approach of the sludge subjected to anaerobic digestion is widened, the muck is effectively utilized, the ecological damage caused by the discarded muck is reduced, and the advantage of turning waste into wealth is achieved.
The procedure for example 1 was as follows:
s1, adding original sludge into a sludge compression bin 12 through a sludge inlet 122, compressing the sludge in the sludge compression bin 12 through a compression plate 121 to realize primary sludge-water separation, wherein when the compression plate 121 is compressed downwards, water flows out of a one-way water filtering hole 16 at the edge of the compression plate 121, and the compression plate 121 contracts upwards to flow the water into a sludge water bin 13 from an overflow port 18;
s2, after the sludge is primarily separated, opening a mud blocking valve 171 to pump the residual sludge into a first reaction tank 2, adding an oxidation sterilizing agent for sterilization, and adding iron salt to destroy cell walls, wherein the reaction time is 1-2 d;
s3, introducing the completely reacted sterile mud into a second reaction tank 3, and adding a dehydrating agent and a sludge conditioner for 6-8 d;
S4, sucking the processed mud into a mud drying shell, drying and stirring the wet mud through the rotation of a spiral drying plate 43, and discharging the wet mud as dry covering soil;
and S5, placing the film for 1-2 days outdoors, and completely drying the film in the air to be used for covering a landfill.
The addition amount of the oxidation sterilizing agent is 3-5% of the weight of the sludge. Is used for killing parasitic ova, pathogenic microorganisms and the like in the sludge, thereby reducing peculiar smell.
The iron salt is added in an amount of 10% of the weight of the sludge, and ferric chloride solution is added into a sludge conditioning tank to perform cell wall breaking reaction with the concentrated sludge under stirring, so that secondary pollution of the sludge is prevented, release of intracellular water and agglomeration of sludge microparticles are promoted, the property of high water retention of the sludge is thoroughly changed, separation of sludge water and chemical substances is promoted, and strength is provided.
The addition amount of the dehydrating agent is 15-25% of the weight of the sludge, and the dehydrating agent is used for further dehydrating the wet sludge.
The sludge conditioner is a magnesium gel conditioner, the addition amount of the magnesium gel conditioner is 20% of the weight of the sludge, and by adopting the scheme, the sludge is improved by adding the conditioner to form a skeleton structure.
The method implemented by the implementation step can modify the sludge by using the building residue soil, so that the modified sludge can be used as a covering material of the refuse landfill. The preparation method has the advantages of simple process, convenient operation, small equipment investment required during application, and investment and operation cost saving. The water content of the sludge obtained by the step is less than 35%. Basically meets the requirements of all indexes of the final covering material of the refuse landfill and provides a practical and reliable solution for the covering material of the refuse landfill.
The embodiment 2 of the invention is changed on the basis of the embodiment 1, and the operation steps are as follows:
s1, see S1 in example 1;
s2, see S2 in real time example 1;
s3, introducing the completely reacted sterile mud into a second reaction tank 3, and adding a sludge conditioner for 1-2 d;
s4, see S4 in example 1;
the dehydrating agent is removed and added in the second reaction tank 3, so that the reaction time can be reduced, drying and dehydration are directly carried out through the spiral drying plate 43, the time for forming covering soil is prolonged, the natural ventilation drying step is removed, the working time of the spiral drying plate 43 is increased, and the efficiency is improved. The water content of the sludge obtained by the step is below 38%. Basically meets the requirements of all indexes of the final covering material of the refuse landfill and provides a practical and reliable solution for the covering material of the refuse landfill.
Example 3 of the present invention changes the following steps on the basis of example 1:
s1, see S1 in example 1;
s2, after the sludge is primarily separated, opening a mud blocking valve 171 to pump the residual sludge into a first reaction tank 2, adding a composite oxidation sterilizing agent into a concentration tank, stirring and uniformly mixing, wherein the retention time is 1-2 d;
s3, adding the composite dehydrating agent, stirring, and uniformly mixing for 6-8 d;
S4, see S4 in example 1;
s5, see S5 in example 1;
the embodiment is used for the alternative scheme when the additive is insufficient, and the conversion of the landfill soil can still be completed. The water content of the sludge obtained by the step is 40%. Basically meets the requirements of all indexes of the final covering material of the refuse landfill and provides a practical and reliable solution for the covering material of the refuse landfill.
In the description of the present invention, it should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. The utility model provides an equipment of mud preparation landfill covering soil which characterized in that: the device comprises a sludge dewatering part, a first reaction tank, a second reaction tank and a sludge drying part, wherein the sludge dewatering part, the first reaction tank, the second reaction tank and the sludge drying part are communicated through pipelines;
the sludge dewatering part comprises a sludge dewatering shell, a sludge compression bin and a sludge sump, wherein the sludge compression bin is positioned in the center of the sludge dewatering shell and is fixed at the bottom of the sludge dewatering shell through a support frame, a compression plate is arranged in the sludge compression bin, a telescopic column is arranged between the compression plate and the top of the sludge dewatering shell, a one-way water filtering hole is arranged between the compression plate and the edge of the inner wall of the sludge compression bin, a sludge discharge port is arranged at the bottom of the sludge compression bin and is communicated with the first reaction tank through a sludge pipe, a sludge inlet is arranged on the side body of the sludge compression bin, a flow overflow port is arranged between the top of the sludge dewatering shell and the top of the sludge compression bin and drains water to the sludge sump, the sludge sump is positioned between the sludge dewatering shell and the upper part of the sludge compression bin, a water outlet is arranged at the top of the sludge sump, a sewage draining outlet is formed in the bottom of the sludge water bin;
The bottom of the first reaction tank and the top of the second reaction tank are provided with one-way valves, the bottom of the second reaction tank is communicated with a sludge drying part, and a sludge suction device is arranged at the communication part of the sludge drying part and the bottom of the second reaction tank;
the sludge drying part comprises a sludge drying shell, a rotating shaft, a spiral drying plate and a landfill soil outlet, the spiral drying plate is abutted to the inner wall of the drying part shell, and the spiral drying plate rotates by taking the rotating shaft as a center.
2. The apparatus for making covering soil of landfill site by using sludge as claimed in claim 1, wherein: the sludge compression bin body is of a cylindrical structure, and the bottom of the sludge compression bin is of a conical structure.
3. The apparatus for making covering soil of landfill site by using sludge as claimed in claim 2, wherein: the sludge inlet of the sludge compression bin is provided with an adjusting valve, and the sludge pipe is provided with a sludge suction valve.
4. The apparatus for making covering soil of landfill site by using sludge as claimed in claim 3, wherein: and a mud valve is arranged at the bottom of the sludge compression bin.
5. The apparatus for making covering soil of landfill site by using sludge as claimed in claim 4, wherein: and filling bins are arranged at the bottom of the first reaction tank and on the second reaction tank, and the filling bins can be used for setting the weight of fillers.
6. A method for preparing covering soil of a landfill by using sludge, which is equipment for preparing the covering soil of the landfill by using the sludge as claimed in any one of claims 1 to 5, and is characterized in that: the method comprises the following operation steps:
s1, adding original sludge into a sludge compression bin through a sludge inlet, compressing the sludge in the sludge compression bin through a compression plate to realize primary sludge-water separation, wherein when the compression plate is compressed downwards, water flows out of a one-way water filtering hole at the edge of the compression plate, the compression plate contracts upwards, and the water flows into a sludge water bin from an overflow port;
s2, after the sludge is primarily separated, opening a mud blocking valve to pump the residual sludge into a first reaction tank, adding an oxidation sterilizing agent for sterilization, and adding iron salt to destroy cell walls for 1-2 d;
s3, introducing the completely reacted sterile mud into a second reaction tank, and adding a dehydrating agent and a sludge conditioner for 6-8 days;
s4, sucking the treated mud into a mud drying shell, drying and stirring the wet mud through the rotation of a spiral drying plate, and discharging the wet mud to obtain dry covering soil;
and S5, placing the film outdoor for 1-2 hours, and completely drying the film in the air to be used for covering the landfill.
7. The method for preparing the covering soil of the landfill site by using the sludge as claimed in claim 6, wherein the method comprises the following steps: the addition amount of the oxidation sterilizing agent is 3-5% of the weight of the sludge.
8. The method for preparing the covering soil of the landfill site by using the sludge as claimed in claim 6, wherein the method comprises the following steps: the addition amount of the iron salt is 10 percent of the weight of the sludge.
9. The method for preparing the covering soil of the landfill site by using the sludge as claimed in claim 6, wherein the method comprises the following steps: the addition amount of the dehydrating agent is 15-25% of the weight of the sludge.
10. The method for preparing the covering soil of the landfill site by using the sludge as claimed in claim 6, wherein the method comprises the following steps: the sludge conditioner is a magnesium gel conditioner, and the addition amount of the magnesium gel conditioner is 20% of the weight of the sludge.
CN202010532299.0A 2020-06-12 2020-06-12 Device and method for preparing covering soil of landfill from sludge Active CN111675456B (en)

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CN112243628B (en) * 2020-10-20 2021-10-15 马鞍山市良田农业科技有限公司 Lotus root pond bottom sludge treatment method for preventing lotus root diseases

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Publication number Priority date Publication date Assignee Title
CN201032328Y (en) * 2007-04-11 2008-03-05 陈学嘉 Piston type sludge dewatering machine
CN104129900A (en) * 2013-08-09 2014-11-05 上海同臣环保有限公司 Method for preparing covering soil for refuse landfill from raw sludge
CN205313357U (en) * 2016-01-21 2016-06-15 李小巧 Paper mill sludge dewatering device
CN108245952A (en) * 2018-04-19 2018-07-06 刘胜军 Sludge drying filter press
CN108314288A (en) * 2018-01-18 2018-07-24 合肥净龙环保科技有限公司 A kind of double crank type sludge compression dehydration environment-friendly processing unit
CN108859213A (en) * 2018-07-17 2018-11-23 厦门厦工重工有限公司 A kind of filter plate and the high pressure piston solid-liquid separating equipment made of the filter plate

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201032328Y (en) * 2007-04-11 2008-03-05 陈学嘉 Piston type sludge dewatering machine
CN104129900A (en) * 2013-08-09 2014-11-05 上海同臣环保有限公司 Method for preparing covering soil for refuse landfill from raw sludge
CN205313357U (en) * 2016-01-21 2016-06-15 李小巧 Paper mill sludge dewatering device
CN108314288A (en) * 2018-01-18 2018-07-24 合肥净龙环保科技有限公司 A kind of double crank type sludge compression dehydration environment-friendly processing unit
CN108245952A (en) * 2018-04-19 2018-07-06 刘胜军 Sludge drying filter press
CN108859213A (en) * 2018-07-17 2018-11-23 厦门厦工重工有限公司 A kind of filter plate and the high pressure piston solid-liquid separating equipment made of the filter plate

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