Treatment system for pond ditch sludge for high-standard farmland construction

Abstract

The utility model relates to a treatment system for pond ditch sludge for high-standard farmland construction, which comprises a pond sludge collection system, a pond ditch sludge treatment system and a pond ditch sludge treatment system, the sludge detection system is used for detecting the heavy metal content and the organic matter content of the sludge collected by the pond sludge collection system; the soil modifying and solidifying treatment unit is used for adding an HAS soil solidifying agent to treat sludge with heavy metal exceeding the standard; and the dehydration and degerming treatment unit is used for respectively treating high-organic-matter sludge, medium-organic-matter sludge and low-organic-matter sludge of which the heavy metals do not exceed the standard. The method has the beneficial effects that the construction cost of the high-standard farmland is reduced, the dependence on external fertilizers is reduced, rich nutrients are provided for the farmland, the soil texture is improved, the soil quality and fertility of the high-standard farmland are effectively improved, the effective utilization of pond ditch sludge resources is realized, the resource waste and environmental pollution are reduced, and the ecological environment protection is facilitated; and pollution caused by random stacking of sludge is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of farmland construction, in particular to a processing system for pond ditch sludge used in high-standard farmland construction. Background Art

[0002] In order to ensure food security, improve agricultural efficiency, enhance disaster resistance, promote sustainable agricultural development, promote agricultural modernization, and increase farmers' income, the country has clearly proposed the construction of high-standard farmland. High-standard farmland refers to farmland that is concentrated and contiguous, with complete facilities, stable and high yields, good ecology, strong disaster resistance, and compatible with modern agricultural production and management methods, which is formed through land reclamation within a certain period of time. Ensuring farmland irrigation and drainage and improving soil fertility are important conditions for building high-standard farmland.

[0003] In current agricultural production, due to harsh climatic conditions in many areas, heavy rains often impact river channels, causing large amounts of silt to accumulate in ponds and ditches, reducing the pond's water storage capacity and causing the ditch's irrigation and drainage function and corridor function to be lost.

[0004] In the process of high-standard farmland construction, land leveling, soil improvement and soil fertility enhancement are three important steps. Pond ditch sludge has been regarded as waste and has not been effectively utilized because it is rich in nutrients and organic matter (fish excrement and various plant decomposition substances) and has both soil and fertilizer properties. At the same time, the sludge contains various bacterial microorganisms that may pollute the environment. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a processing system for pond ditch sludge used in high-standard farmland construction, so as to overcome the deficiencies in the above-mentioned prior art.

[0006] The utility model solves the above technical problems with the following technical solutions: A treatment system for pond ditch sludge used in high-standard farmland construction, comprising:

[0007] Pond sludge collection system, used to collect sludge from pond ditches;

[0008] The sludge detection system is used to detect the heavy metal content and organic matter content of the sludge collected by the pond sludge collection system;

[0009] Soil modification and solidification treatment unit, used to add HAS soil solidifier to treat sludge with excessive heavy metal content;

[0010] The dehydration and sterilization treatment unit is used to separately treat high-organic sludge, medium-organic sludge and low-organic sludge that do not exceed the heavy metal standard.

[0011] On the basis of the above technical solution, the present invention can also be improved as follows.

[0012] Furthermore, the pond sludge collection system includes: sludge excavation equipment and conveying equipment, and the sludge collected by the sludge excavation equipment is sent to the sludge detection system by the conveying equipment.

[0013] Furthermore, the sludge excavation equipment includes: one or more of an excavator, a bulldozer, a silt remover, and a slurry pump.

[0014] Furthermore, the sludge detection system includes: heavy metal content detection equipment and organic matter content detection equipment. The sludge collected by the pond sludge collection system is sent to the heavy metal content detection equipment. The sludge with excessive heavy metals detected by the heavy metal content detection equipment is sent to the soil modification and solidification treatment unit. The sludge with no excessive heavy metals detected by the heavy metal content detection equipment is sent to the organic matter content detection equipment. The high organic matter sludge, medium organic matter sludge and low organic matter sludge detected by the organic matter content detection equipment are sent to the dehydration and sterilization treatment unit for different treatments.

[0015] Further, the dehydration and sterilization processing unit includes:

[0016] The organic fertilizer preparation unit is used to prepare organic fertilizer after dehydration and sterilization of high-organic sludge, and adjust the moisture content to less than 20%;

[0017] The planting soil preparation unit is used to dehydrate and sterilize the medium organic sludge and use it as the high-standard farmland soil tillage layer, with the moisture content adjusted to 15% to 20%;

[0018] The drying unit is used to dehydrate and sterilize the low-organic sludge and use it as the effective soil layer under the tillage layer in the field-to-field transformation project, with the moisture content adjusted to below 25%.

[0019] Furthermore, the dehydration and sterilization treatment unit also includes:

[0020] The pretreatment unit is used to filter the sludge flowing to the organic fertilizer preparation unit, the planting soil preparation unit and the drying unit.

[0021] Furthermore, the organic matter content of high organic matter sludge is greater than 30g / kg, the organic matter content of medium organic matter sludge is between 12g / kg and 30g / kg, and the organic matter content of low organic matter sludge is less than 12g / kg.

[0022] The beneficial effects of the utility model are:

[0023] Testing, screening and classified disposal of pond and ditch sludge can provide the soil needed for land leveling, planting soil for soil improvement, fertilizer for improving soil fertility and replace construction materials (sand and clay) for infrastructure construction for high-standard farmland construction, reduce the cost of high-standard farmland construction, and at the same time reduce dependence on external fertilizers, provide rich nutrients and improve soil texture for farmland, effectively improve the soil quality and fertility of high-standard farmland, realize the effective utilization of pond and ditch sludge resources, reduce resource waste and environmental pollution, be beneficial to ecological environment protection, avoid pollution caused by random stacking of sludge, and have good economic and ecological benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural diagram of a treatment system for pond and ditch sludge in the utility model for high-standard farmland construction.

[0025] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0026] 1. Pond sludge collection system, 110. Silt excavation equipment, 120. Transportation equipment, 2. Silt detection system, 210. Heavy metal content detection equipment, 220. Organic matter content detection equipment, 3. Soil modification and solidification treatment unit, 4. Dehydration and sterilization treatment unit, 410. Organic fertilizer preparation unit, 420. Planting soil preparation unit, 430. Drying unit, 440. Pretreatment unit. DETAILED DESCRIPTION

[0027] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0028] Example 1

[0029] like Figure 1 As shown, a pond ditch sludge treatment system for high-standard farmland construction includes:

[0030] A pond sludge collection system 1, a sludge detection system 2, a soil modification and solidification treatment unit 3, and a dehydration and degerming treatment unit 4. The pond sludge collection system 1 is connected to the sludge detection system 2, and the sludge detection system 2 is respectively connected to the soil modification and solidification treatment unit 3 and the dehydration and degerming treatment unit 4;

[0031] The pond sludge collection system 1 is used to collect sludge from pond ditches;

[0032] The sludge detection system 2 is used to detect the heavy metal content and organic matter content of the sludge collected by the pond sludge collection system 1;

[0033] The soil modification and solidification treatment unit 3 is used to add HAS soil solidifier to dispose of the sludge with excessive heavy metals. The HAS soil solidifier adopts the existing technology, so it will not be described in detail here. The sludge with excessive heavy metals is modified and solidified by adding HAS soil solidifier, and is used as a construction material for farmland infrastructure construction projects in the process of high-standard farmland construction instead of sand and clay. Farmland water conservancy facilities: such as channel lining, irrigation sluice, pump house, etc.; mechanized farming road and production road subgrade construction; farmland protection projects: such as retaining walls, slope protection, etc.; small farmland building foundations: such as farm bridges, culverts, reservoirs, drying yards, etc.;

[0034] The dehydration and sterilization treatment unit 4 is used to treat high-organic sludge, medium-organic sludge and low-organic sludge respectively, in which heavy metals do not exceed the standard;

[0035] After being treated, high-organic sludge can be used as fertilizer to improve soil fertility;

[0036] After being treated, the organic sludge is evenly spread on the surface of the farmland, and the sludge is fully mixed with the farmland soil through specific mechanical or manual methods to serve as the soil tillage layer;

[0037] After being treated, the low-organic sludge is used as the effective soil layer below the tillage layer in the land leveling project.

[0038] Example 2

[0039] like Figure 1 As shown, this embodiment is a further improvement on the basis of embodiment 1, and the details are as follows:

[0040] The pond sludge collection system 1 includes: sludge excavation equipment 110 and conveying equipment 120. The sludge collected by the sludge excavation equipment 110 is sent to the sludge detection system 2 by the conveying equipment 120. The sludge excavation equipment 110 includes: one or more of an excavator, a bulldozer, a silt remover, and a mud pump. For ponds and ditches that have been abandoned and lost their ability to be used, excavators, bulldozers, etc. are used to carry out silt work. For ponds that are in operation but need silting, silt removers, mud pumps, etc. are used to carry out silt removal work.

[0041] Example 3

[0042] like Figure 1 As shown, this embodiment is a further improvement on the basis of Embodiment 1 or 2, and the details are as follows:

[0043] The sludge detection system 2 includes: a heavy metal content detection device 210 and an organic matter content detection device 220. The sludge collected by the pond sludge collection system 1 is sent to the heavy metal content detection device 210, and the heavy metal content detection device 210 detects the sent sludge. The sludge detected with excessive heavy metals is sent to the soil modification and solidification treatment unit 3, and the sludge detected with no excessive heavy metals is sent to the organic matter content detection device 220.

[0044] The organic matter content detection equipment 220 detects the organic matter content of the sludge without exceeding the heavy metal standard, and the detected high organic matter sludge, medium organic matter sludge and low organic matter sludge are respectively sent to the dehydration and sterilization treatment unit 4, and the dehydration and sterilization treatment unit 4 performs different treatments on the high organic matter sludge, medium organic matter sludge and low organic matter sludge.

[0045] Furthermore: the dehydration and sterilization treatment unit 4 includes: an organic fertilizer preparation unit 410, a planting soil preparation unit 420 and a drying unit 430, and the high organic matter sludge, the medium organic matter sludge and the low organic matter sludge are respectively sent into the organic fertilizer preparation unit 410, the planting soil preparation unit 420 and the drying unit 430;

[0046] Organic fertilizer preparation unit 410:

[0047] After dehydration and sterilization of high-organic sludge with an organic matter content greater than 30g / kg, organic fertilizer is prepared, the moisture content of the sludge is adjusted to below 20%, and improvers such as organic fertilizers and microbial agents are added as fertilizers for soil fertility improvement projects;

[0048] Planting soil preparation unit 420:

[0049] It is used to dehydrate and sterilize the medium organic sludge with an organic matter content of 12g / kg to 30g / kg, and then use it as a high-standard farmland soil tillage layer for land leveling engineering, adjust the sludge moisture content to 15% to 20%, and evenly spread the sludge on the farmland surface. The sludge is fully mixed with the farmland soil by specific mechanical or manual methods. According to the actual needs of the region, the soil tillage layer after laying is controlled to be 20cm to 30cm;

[0050] Drying unit 430:

[0051] After dehydration and sterilization, low-organic sludge with an organic matter content of less than 12g / kg is used as the effective soil layer under the tillage layer of the field-breaking to field-leveling project for land leveling. According to the actual needs of the region, the effective soil layer after laying is controlled to be 30cm to 80cm, with a moisture content of less than 25%;

[0052] Dehydration and sterilization use paddle dryers, flash dryers that use high-temperature steam or heat-conducting oil as heat sources, or low-temperature dryers (working at around 70°C). The above equipment can meet the temperature conditions for removing harmful bacteria, parasite eggs, weed seeds, etc. in sludge, and can also dehydrate.

[0053] In addition, the dehydration and sterilization treatment unit 4 also includes: a pretreatment unit 440, which is used to filter and remove impurities from the sludge flowing to the organic fertilizer preparation unit 410, the planting soil preparation unit 420 and the drying unit 430, for example: removing larger impurities in the sludge, such as stones, branches, etc.

[0054] Application Examples

[0055] In a high-standard farmland construction project, the drainage system of the project site was not smooth and the amount of pond and ditch silt was large. Through sludge detection and classification treatment, the sludge with excessive heavy metals was used for road paving, the high-organic dehydrated and sterilized sludge with an organic matter content of more than 30g / kg was used for soil fertility improvement after being prepared as organic fertilizer, the medium-organic dehydrated and sterilized sludge with an organic matter content of 12g / kg to 30g / kg was used for planting soil paving, and the low-organic dehydrated and sterilized sludge with an organic matter content of less than 12g / kg was used for land leveling. After application, the cost of high-standard farmland construction was effectively reduced, and at the same time, an effective way was provided for the resource utilization and harmless treatment of pond and ditch sludge.

[0056] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A pond ditch sludge treatment system for high-standard farmland construction, characterized in that: include: A pond sludge collection system (1) for collecting sludge from a pond ditch; A sludge detection system (2) is used to detect the heavy metal content and organic matter content of the sludge collected by the pond sludge collection system (1); A soil modification and solidification treatment unit (3) is used to add HAS soil solidifying agent to treat sludge with excessive heavy metal content; A dehydration and sterilization treatment unit (4) is used to treat high-organic sludge, medium-organic sludge and low-organic sludge respectively, in which heavy metals do not exceed the standard; The pond sludge collection system (1) is connected to the sludge detection system (2), and the sludge detection system (2) is respectively connected to the soil modification and solidification treatment unit (3) and the dehydration and sterilization treatment unit (4).

2. A pond ditch sludge treatment system for high-standard farmland construction according to claim 1, characterized in that: The pond sludge collection system (1) comprises: sludge excavation equipment (110) and conveying equipment (120); the sludge collected by the sludge excavation equipment (110) is sent to the sludge detection system (2) by the conveying equipment (120).

3. A pond ditch sludge treatment system for high-standard farmland construction according to claim 2, characterized in that: The sludge excavation equipment (110) includes: one or more of an excavator, a bulldozer, a silt remover, and a slurry pump.

4. A pond ditch sludge treatment system for high-standard farmland construction according to claim 1, characterized in that: The sludge detection system (2) comprises: a heavy metal content detection device (210) and an organic matter content detection device (220); the sludge collected by the pond sludge collection system (1) is sent to the heavy metal content detection device (210); the sludge with excessive heavy metals detected by the heavy metal content detection device (210) is sent to a soil modification and solidification treatment unit (3); the sludge with no excessive heavy metals detected by the heavy metal content detection device (210) is sent to an organic matter content detection device (220); and the high organic matter sludge, medium organic matter sludge and low organic matter sludge detected by the organic matter content detection device (220) are sent to a dehydration and sterilization treatment unit (4) for different treatments.

5. A pond ditch sludge treatment system for high-standard farmland construction according to claim 4, characterized in that: The dehydration and sterilization treatment unit (4) comprises: An organic fertilizer preparation unit (410) is used to prepare organic fertilizer after dehydration and sterilization of high-organic matter sludge, and adjust the moisture content to less than 20%; The planting soil preparation unit (420) is used to dehydrate and sterilize the organic sludge to form a high-standard farmland soil cultivation layer, and adjust the moisture content to 15% to 20%; The drying unit (430) is used to dehydrate and sterilize the low-organic sludge to serve as the effective soil layer below the tillage layer in the field-crushing to field-leveling project, and the moisture content is adjusted to below 25%.

6. A pond ditch sludge treatment system for high-standard farmland construction according to claim 5, characterized in that: The dehydration and sterilization treatment unit (4) further comprises: The pretreatment unit (440) is used to filter and remove impurities from the sludge flowing to the organic fertilizer preparation unit (410), the planting soil preparation unit (420) and the drying unit (430).

7. The pond ditch sludge treatment system for high-standard farmland construction according to claim 1 is characterized in that: The organic matter content of the high-organic sludge is greater than 30 g / kg, the organic matter content of the medium-organic sludge is between 12 g / kg and 30 g / kg, and the organic matter content of the low-organic sludge is less than 12 g / kg.

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