CN108773990B - Sludge in-situ solidification construction method - Google Patents
Sludge in-situ solidification construction method Download PDFInfo
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- CN108773990B CN108773990B CN201810646696.3A CN201810646696A CN108773990B CN 108773990 B CN108773990 B CN 108773990B CN 201810646696 A CN201810646696 A CN 201810646696A CN 108773990 B CN108773990 B CN 108773990B
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/008—Sludge treatment by fixation or solidification
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Abstract
The invention relates to the technical field of sludge treatment methods, in particular to a sludge in-situ solidification construction method. The sludge in-situ solidification construction method comprises the following steps: step 100, adopting in-situ solidification equipment to solidify sludge in a shallow depth area in a sludge pit; 200, after the sludge strength of the solidified area meets the requirement, arranging a turnover pit at the solidified area close to the uncured area; 300, transferring the sludge in the uncured area into a turnover pit, and curing the sludge in the turnover pit by adopting in-situ curing equipment; step 400, when the sludge in the turnover pit meets the requirement after solidification treatment, transferring the sludge in the turnover pit to an uncured area; and 500, repeating the step 300 and the step 400 until all the sludge in the sludge pit is solidified. The invention provides a sludge in-situ solidification construction method, which aims to solve the technical problem that ultra-deep sludge in a sludge pit is difficult to solidify in the prior art.
Description
Technical Field
The invention relates to the technical field of sludge treatment methods, in particular to a sludge in-situ solidification construction method.
Background
Due to long-term neglect of sludge treatment problems generated by sewage treatment plants, sludge generated by most domestic sewage treatment plants is not effectively treated, and the sludge of the sewage treatment plants refers to solid, semi-solid and liquid wastes generated by sewage treatment, and contains a large amount of organic matters, heavy metals, pathogenic bacteria and the like.
Most of sludge is poured randomly or illegally enters a household garbage landfill to cause a large number of sludge pits all over the country, and after the sludge enters the sludge pits, if the sludge is not treated, the sludge basically keeps the original state after years, so that serious secondary pollution is caused to the environment. With the continuous attention and concern of the country on the sludge disposal problem, the sludge pits must be treated, wherein the in-situ solidification treatment technology has the advantages of short construction period, small environmental influence, good treatment effect and the like, and is widely applied to sludge pit treatment projects. The solidification treatment of the sludge is a process of adding a solidification material mainly comprising cement into the sludge, stirring and mixing the mixture, thereby changing the property of the sludge to make the sludge become non-flowable or form solid. The purpose of sludge stable solidification is mainly two: firstly, the mobility of the pollutants is changed by a physical or chemical method so as to reduce the probability of pollution; secondly, the mechanical property of the processed body is enhanced so as to be utilized in the construction. The in-situ solidification treatment technology carries out in-situ solidification resource treatment on the sludge, thereby avoiding secondary pollution possibly caused by the sludge in the transfer transportation process.
In the construction of in-situ solidification treatment of sludge, in-situ solidification equipment (such as patents: CN201420606957.6 and CN201320642645.6) is generally used for in-situ solidification construction. However, the in-situ solidification treatment technology is limited by the treatment depth of in-situ solidification equipment, and only sludge in a shallow region in the sludge pit can be solidified, so that the sludge can reach the required solidification strength, the solidification treatment of sludge with ultra-depth in the sludge pit is difficult to realize, and the in-situ solidification treatment technology is limited to a certain extent in the field of sludge pit treatment.
Therefore, the application provides a new sludge in-situ solidification construction method aiming at the problems.
Disclosure of Invention
The invention aims to provide a sludge in-situ solidification construction method, which aims to solve the technical problem that ultra-deep sludge in a sludge pit is difficult to solidify in the prior art.
Based on the above purpose, the invention provides a sludge in-situ solidification construction method, which comprises the following steps:
step 100, solidifying sludge in a shallow depth area in a sludge pit by adopting in-situ solidification equipment to form a solidified area in the area, wherein the rest area in the sludge pit is an uncured area;
200, after the sludge strength of the solidified area meets the requirement, arranging a turnover pit at the solidified area close to the uncured area, wherein the in-situ solidification equipment can carry out solidification treatment on the sludge in the turnover pit;
300, transferring the sludge in the uncured area into the turnover pit, and curing the sludge in the turnover pit by using the in-situ curing equipment;
step 400, transferring the sludge in the turnover pit to the uncured area after the sludge in the turnover pit is cured to meet the requirement;
step 500, repeating the step 300 and the step 400 until all the sludge in the sludge pit is solidified.
In the above technical solution, further, in the step 400 of the present invention, the sludge in the turnaround pit is transferred to the uncured area near the cured area, so that the cured area is gradually increased and the uncured area is gradually decreased.
In any of the above technical solutions, further, after the initial setting period of 2 days, the sludge in the turnover pit after the solidification treatment is transported to the uncured area close to the cured area by using an excavator or a loader.
In any of the above solutions, further, after repeating the step 400 for the first time in the step 300, the present invention repeats the step 200, so that the turnaround pit moves toward the direction close to the uncured region along with the cured region.
In any of the above technical solutions, further, in the step 200 of the present invention, a channel is provided to communicate the turnaround pit with the uncured area;
in step 300, sludge in the uncured region is transferred through the channel into the turnaround pit.
In any of the above technical solutions, further, in the step 300 of the present invention, the sludge in the uncured region is transferred to the turnover pit through the channel, so that the turnover pit is filled with sludge, and the channel is plugged with clay.
In any technical scheme, further, the depth of the shallow depth area in the sludge pit is not more than 8 m.
In any of the above technical solutions, further, in the step 400 of the present invention, the sludge in the turnaround pit meets the requirement after solidification, that is, the sludge solidified in the turnaround pit passes through an initial setting period.
In any of the above technical means, further, the width of the turnaround pit of the present invention is 10m, and the depth is 4m to 6 m.
In any of the above technical solutions, further, the width of the channel is 2m, and the depth is 2m to 4 m.
By adopting the technical scheme, the invention has the following beneficial effects:
the in-situ solidification equipment can be used for solidifying the sludge in the turnover pit, namely, the depth of the turnover pit is shallow, the in-situ solidification equipment can be used for solidifying the sludge in the turnover pit to enable the sludge to reach the required solidification strength, and the solidification effect can reach the treatment target.
The density of the sludge subjected to solidification treatment in the turnover pit is increased relative to that of the sludge subjected to solidification treatment, so that after the sludge in the turnover pit is transferred into an uncured area, the sludge subjected to solidification treatment sinks, and the sludge subjected to solidification treatment in the uncured area is extruded and lifted, so that the sludge subjected to solidification treatment in the uncured area is transferred into the turnover pit for treatment, and the steps 300 and 400 are repeated until the uncured area is buried into a solidified area from the sludge in the turnover pit, so that the solidified area is gradually increased, and the uncured area is gradually decreased until the sludge in the sludge pit is completely solidified.
In the sludge in-situ solidification construction method provided by the embodiment, the turnover pit is arranged in the solidified area, the sludge in the uncured area is transferred into the turnover pit for solidification treatment, then the sludge after solidification treatment is transferred to an uncured area, so that the in-situ solidification treatment of the sludge in the sludge pit is realized, even the ultra-deep sludge in the sludge pit can be solidified and treated by the in-situ solidification equipment, the problem that the ultra-deep sludge in the sludge pit cannot be treated by the sludge in-situ solidification technology in the prior art is solved, the development and the application of the in-situ solidification technology in the field of sludge pit treatment are promoted, and the method has the advantages of simple operation, high efficiency and low cost, in addition, the method realizes the solidification construction of the sludge in the original site, greatly reduces the environmental influence compared with ex-situ solidification treatment, has higher environmental benefit and economic benefit, and has great promotion effect on the development of sludge pit treatment technology.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic view showing the structure of a sludge pit according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a sludge pit constructed by the sludge in-situ solidification construction method provided by the embodiment of the invention;
FIG. 3 is a sectional view of the sludge pit shown in FIG. 2.
Icon: 1-sludge pit; 2-shallow depth region; 3-cured areas; 4-uncured areas; 5-a turnover pit; 6-channel.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
Referring to fig. 1 to 3, the present embodiment provides a sludge in-situ solidification construction method, including:
step 100, solidifying sludge in a shallow region 2 with a smaller depth in a sludge pit 1 by adopting in-situ solidification equipment to form a solidified region 3 in the region, wherein the rest region in the sludge pit 1 is an uncured region 4;
200, after the sludge strength of the solidified area 3 meets the requirement, arranging a turnover pit 5 at the solidified area 3 close to the uncured area 4, wherein the in-situ solidification equipment can perform solidification treatment on the sludge in the turnover pit 5;
300, transferring the sludge in the uncured region 4 into the turnover pit 5, and curing the sludge in the turnover pit 5 by using the in-situ curing equipment;
step 400, when the sludge in the turnover pit 5 meets the requirement of solidification treatment, transferring the sludge in the turnover pit 5 into the uncured area 4;
step 500, repeating the step 300 and the step 400 until all the sludge in the sludge pit 1 is solidified.
The in-situ solidification equipment can be used for solidifying the sludge in the turnover pit, namely, the depth of the turnover pit is shallow, the in-situ solidification equipment can be used for solidifying the sludge in the turnover pit to enable the sludge to reach the required solidification strength, and the solidification effect can reach the treatment target.
The density of the sludge subjected to solidification treatment in the turnover pit is increased relative to that of the sludge subjected to solidification treatment, so that after the sludge in the turnover pit is transferred into an uncured area, the sludge subjected to solidification treatment sinks, and the sludge subjected to solidification treatment in the uncured area is extruded and lifted, so that the sludge subjected to solidification treatment in the uncured area is transferred into the turnover pit for treatment, and the steps 300 and 400 are repeated until the uncured area is buried into a solidified area from the sludge in the turnover pit, so that the solidified area is gradually increased, and the uncured area is gradually decreased until the sludge in the sludge pit is completely solidified.
In the sludge in-situ solidification construction method provided by the embodiment, the turnover pit is arranged in the solidified area, the sludge in the uncured area is transferred into the turnover pit for solidification treatment, then the sludge after solidification treatment is transferred to an uncured area, so that the in-situ solidification treatment of the sludge in the sludge pit is realized, even the ultra-deep sludge in the sludge pit can be solidified and treated by the in-situ solidification equipment, the problem that the ultra-deep sludge in the sludge pit cannot be treated by the sludge in-situ solidification technology in the prior art is solved, the development and the application of the in-situ solidification technology in the field of sludge pit treatment are promoted, and the method has the advantages of simple operation, high efficiency and low cost, in addition, the method realizes the solidification construction of the sludge in the original site, greatly reduces the environmental influence compared with ex-situ solidification treatment, has higher environmental benefit and economic benefit, and has great promotion effect on the development of sludge pit treatment technology.
In the step 300, the water content and the organic matter content of the sludge in the turnaround pit are analyzed, and then the proportion of the curing material is designed according to the volume of the sludge in the turnaround pit, and further the sludge in the turnaround pit is cured by using in-situ curing equipment.
In addition, the sludge strength of the solidified area meets the requirement, that is, the sludge strength of the solidified area needs to meet the requirement of being capable of bearing mechanical equipment such as a loader, an excavator and the like.
Preferably, in step 400, the sludge in the turnaround pit 5 is transferred to the area 4 close to the solidified area 3, so that the solidified area 3 is gradually increased and the area 4 is gradually decreased.
So that the solidified area is a continuous area, thereby facilitating the transfer of sludge in the uncured area to the turnaround pit or facilitating the transfer of sludge subjected to the curing treatment in the turnaround pit to the uncured area.
Optionally, after the initial setting period of 2 days, the sludge after the solidification treatment in the turnover pit is transported to the uncured area 4 near the cured area 3 by using an excavator or a loader.
Preferably, after repeating step 300 and step 400 for a first time, repeating step 200 to move the epicyclic pit 5 with the cured region 3 in a direction closer to the uncured region 4.
The turnover pit is arranged at the position of the solidified area close to the uncured area along with the gradual increase of the solidified area by moving the turnover pit along with the solidified area to the direction close to the uncured area, so that the sludge in the uncured area is convenient to transfer into the turnover pit.
Optionally, the first time is five days, ten days, fifteen days or twenty days, etc., so as to reduce the time consumption for digging the turnover pit.
Preferably, referring to fig. 2 and 3, in step 200, channels 6 are provided to communicate the turnaround wells 5 with the uncured zones 4;
in step 300, sludge in the uncured zone 4 is transferred through the channel 6 into the turnaround pit 5.
A channel 6 is provided to communicate the turnaround pit with the uncured area to facilitate transfer of sludge within the uncured area into the turnaround pit.
Specifically, the sludge in the uncured area is transferred through the channel and the excavator into the turnaround pit.
Preferably, in step 300, the sludge in the uncured zone 4 is transferred to the turnaround pit 5 through the channel 6 to fill the turnaround pit 5 with sludge and the channel 6 is plugged with clay.
The sludge in the turnover pit is prevented from flowing back to an uncured area along the channel in the process of curing the sludge in the turnover pit, or the sludge in the uncured area flows into the turnover pit along the channel to influence the quality of the sludge curing treatment.
Preferably, the depth of the shallow depth zone 2 in the sludge pit 1 is not more than 8 m.
Specifically, the depth of the shallow depth region 2 in the sludge pit 1 is 1m, 2m, 3m, 4m, 5m, 6m, 7m, 8m, or the like.
The depth of the shallow depth region 2 in the sludge pit 1 is not more than 8m, namely, the depth of the shallow depth region 2 in the sludge pit 1 is shallow, the in-situ solidification equipment can solidify the sludge in the region to enable the sludge to reach the required solidification strength, and the solidification effect can reach the treatment target.
In step 400, the sludge in the transfer pit 5 is solidified to meet the requirement, that is, the solidified sludge in the transfer pit 5 passes through an initial setting period.
Preferably, in this embodiment, the width of turnaround pit 5 is 10m and the depth is 4m to 6 m.
Alternatively, the depth of the turnaround pit 5 is 4m, 5m, or 6m, etc.
The length of the turnover pit 5 is adjusted according to the actual situation of the field.
Preferably, the width of the channel 6 is 2m and the depth is 2m to 4 m.
Optionally, the depth of the channel 6 is 2m, 3m or 4m, etc.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the claims above, any of the claimed embodiments may be used in any combination. The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Claims (8)
1. The sludge in-situ solidification construction method is characterized by comprising the following steps:
step 100, solidifying sludge in a shallow depth area in a sludge pit by adopting in-situ solidification equipment to form a solidified area in the area, wherein the rest area in the sludge pit is an uncured area;
200, after the sludge strength of the solidified area meets the requirement, arranging a turnover pit at the solidified area close to the uncured area, wherein the in-situ solidification equipment can carry out solidification treatment on the sludge in the turnover pit;
300, transferring the sludge in the uncured area into the turnover pit, and curing the sludge in the turnover pit by using the in-situ curing equipment;
step 400, after the sludge in the turnover pit meets the requirement of solidification treatment, transferring the sludge in the turnover pit to the uncured area, sinking the solidified sludge, and extruding and lifting the uncured sludge in the uncured area, so that the uncured sludge in the uncured area is conveniently transferred to the turnover pit for treatment;
500, repeating the step 300 and the step 400 until all the sludge in the sludge pit is solidified;
wherein in step 200, a channel is provided to communicate the turnaround pit with the uncured area; in the step 300, transferring the sludge in the uncured area into the turnover pit through the channel;
the depth of the shallow area in the sludge pit is not more than 8 m.
2. The sludge in-situ solidification construction method according to claim 1, wherein in the step 400, the sludge in the turnover pit is transferred to the uncured region close to the cured region, so that the cured region is gradually increased and the uncured region is gradually decreased.
3. The sludge in-situ solidification construction method according to claim 2, wherein the sludge after the solidification treatment in the turnover pit is transported to the uncured area close to the cured area by using an excavator or a loader after 2 days of initial setting.
4. The sludge in-situ solidification construction method as claimed in claim 2, wherein the step 200 is repeated after the step 400 is repeated for the first time after the step 300 is repeated, so that the turnover pit moves along with the solidified area to a direction close to the uncured area.
5. The sludge in-situ solidification construction method according to claim 1, wherein in the step 300, sludge in the uncured area is transferred to the turnover pit through the channel so that the turnover pit is filled with sludge, and the channel is blocked by clay.
6. The sludge in-situ solidification construction method according to claim 1, wherein in the step 400, the sludge in the turnover pit is solidified to meet the requirement, namely the solidified sludge in the turnover pit passes through an initial setting period.
7. The sludge in-situ solidification construction method according to any one of claims 1 to 6, wherein the width of the turnover pit is 10m and the depth is 4m to 6 m.
8. The sludge in-situ solidification construction method according to claim 1 or 5, wherein the width of the channel is 2m, and the depth is 2m to 4 m.
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| CN106800363B (en) * | 2017-03-10 | 2023-04-18 | 中国科学院武汉岩土力学研究所 | Silt/mud storage yard normal position solidification equipment |
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