Geotextile tube bag desilting conditioner with low leakage pollution and preparation method of geotextile tube bag desilting conditioner

Abstract

The invention relates to the technical field of desilting, and discloses a geotextile tube desilting conditioner with low leakage pollution and a preparation method thereof, the geotextile tube desilting conditioner is composed of polyaspartic acid, polyacrylamide, sodium carboxymethyl cellulose, amylopectin, sodium alginate and the balance of water; the desilting conditioner for the geotextile tube bag comprises the following components in parts by weight: 10-20% of polyaspartic acid; 1%-5% of polyacrylamide; 10%-30% of sodium carboxymethyl cellulose; 10%-30% of amylopectin; 5%-15% of sodium alginate; and the balance of water. The soil engineering pipe bag desilting conditioner has the advantages that the soil engineering pipe bag desilting conditioner can cooperate with one another to improve surface charge of sludge, reduce capillary pressure, support floc strength and strengthen sludge-water separation effect, accordingly, water content can be quickly and efficiently reduced, the soil engineering pipe bag desilting conditioner has good effect on fermented sludge, in addition, parameters such as COD (chemical oxygen demand) and ammonia nitrogen in the soil engineering pipe bag desilting conditioner are low, and the soil engineering pipe bag desilting conditioner is low in cost. And corresponding indexes in the water body cannot rise after leakage, so that the device is safer and more environment-friendly.

Description

Technical Field

[0001] The invention relates to the technical field of dredging, in particular to a low-leakage and pollution-free geotube bag dredging conditioner and a preparation method thereof. Background Art

[0002] The use of geotubes for sludge dehydration is a process of filling a large amount of high-water content sludge into the tube, effectively and quickly draining the water and intercepting the solid particles in the sludge under the strong pressure inside the tube. The geotube material is woven from composite (strip-shaped) and unidirectional high-tenacity polypropylene or polyester fiber filaments. The material itself has high strength and a certain surface permeability. Less land is required to quickly dehydrate and dry the bottom mud; the dehydration speed of the bottom mud in the lower tube bag can also be accelerated by stacking. The most important thing is to add a functional agent to quickly separate the mud and water, thereby accelerating the interception of pollutants and sludge sediments in the tube bag, achieving the effect of synchronous dehydration and removal of some pollutants.

[0003] At present, the geotube bag agent on the market is mainly polyacrylamide, which has a certain effect on ordinary silt, but has a poor effect on long-term fermented riverbed mud. In addition, the supernatant of the geotube bag method is directly discharged into the river. If the mud and water separation cannot be achieved in the geotube bag conditioning stage or the amount of agent added is too large, a large amount of agent will be discharged into the river, causing great secondary pollution such as COD. Therefore, a low leakage and pollution geotube bag dredging conditioning agent and a preparation method thereof are proposed. Summary of the invention

[0004] The purpose of the present invention is to provide a low-leakage and pollution-free geotube bag dredging conditioner and a preparation method thereof, so as to solve the problem mentioned in the above background technology that the geotube bag agents currently on the market are mainly polyacrylamide, which has a certain effect on ordinary silt, but has a poor effect on long-term fermented riverbed mud, and the supernatant of the geotube bag method is directly discharged into the river. If the mud and water separation cannot be achieved in the geotube bag conditioning stage or the amount of agent added is too large, a large amount of agent will be discharged into the river, causing huge secondary pollution such as COD.

[0005] To achieve the above object, the present invention provides the following technical solution: a low leakage and pollution geotube bag dredging conditioner, the geotube bag dredging conditioner is composed of polyaspartic acid, polyacrylamide, sodium carboxymethyl cellulose, pullulan, sodium alginate and the balance is water;

[0006] The composition weight ratio of the geotube bag dredging conditioner is:

[0007] Polyaspartic acid: 10%-20%;

[0008] Polyacrylamide: 1%-5%;

[0009] Sodium carboxymethyl cellulose: 10%-30%;

[0010] Amylopectin: 10%-30%;

[0011] Sodium alginate: 5%-15%;

[0012] The balance is water.

[0013] Preferably, the polyacrylamide mentioned above is a cationic polyacrylamide emulsion.

[0014] Preferably, the ionicity of the cationic polyacrylamide emulsion is one or more of 10%, 20%, and 30%.

[0015] Preferably, the sodium alginate mentioned above is a 10% aqueous solution of sodium alginate.

[0016] The present invention also provides a method for preparing a low leakage and pollution geotube bag dredging conditioner, comprising the following steps:

[0017] S1. Add polyaspartic acid and sodium carboxymethyl cellulose in a certain proportion into a mixed solution of 500 L of pure water and stir;

[0018] S2, raising the temperature of the mixed solution to 100°C at a rate of 5°C / min and reacting for a period of time;

[0019] S3, cooling the reaction product in S2 to 40-60° C., then adding a certain amount of amylopectin, maintaining stirring for 30 min, and then injecting the cationic polyacrylamide emulsion into the reactant at a rate of 1 L / s, cooling the temperature to 20-30° C., to obtain product 1;

[0020] S4, controlling the temperature at 20-30°C, injecting a 10% aqueous solution of sodium alginate into the product 1 in S3 at a rate of 1-10 L / s, and after the injection, stirring the mixed solution to obtain a geotube bag dredging conditioner.

[0021] Preferably, in S1 above, the stirring time is 60 min.

[0022] Preferably, in S2 above, the reaction time of the mixed solution after heating is 4 hours.

[0023] Preferably, in S4 above, the stirring time of the mixed solution is controlled to be 30-60 min.

[0024] Compared with the prior art, the present invention adopts the above technical scheme and has the following technical effects: the present invention can cooperate with each other to improve the surface charge of sludge and reduce capillary pressure, support the strength of flocs, and enhance the mud-water separation effect, thereby quickly and efficiently reducing the moisture content, and it also has a good effect on fermented sludge. In addition, the COD, ammonia nitrogen and other parameters in the local industrial bag dredging conditioner are relatively low, and leakage will not cause the corresponding indicators in the water body to rise, which is safer and more environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a schematic diagram of the use process of the medicine of the present invention. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0029] Example

[0030] In the prior art, the geotube bag chemicals on the market are mainly polyacrylamide, which has a certain effect on ordinary silt, but has a poor effect on long-term fermented riverbed mud. In addition, the supernatant of the geotube bag method is directly discharged into the river. If the mud and water separation cannot be achieved in the geotube bag conditioning stage or the amount of chemical added is too large, a large amount of chemical will be discharged into the river, causing great secondary pollution such as COD.

[0031] See also Figure 1The present invention provides a technical solution: a low leakage and pollution geotube bag dredging conditioner, the geotube bag dredging conditioner is composed of polyaspartic acid, polyacrylamide, sodium carboxymethyl cellulose, pullulan, sodium alginate and the balance is water;

[0032] The composition weight ratio of geotube bag dredging conditioner is:

[0033] Polyaspartic acid: 20%;

[0034] Polyacrylamide: 3%;

[0035] Sodium carboxymethylcellulose: 15%;

[0036] Pullulan: 10%;

[0037] Sodium alginate: 5%;

[0038] Water: 47%.

[0039] The polyacrylamide is a cationic polyacrylamide emulsion; the ion degree of the cationic polyacrylamide emulsion is one or more of 10%, 20% and 30%; the sodium alginate is a 10% aqueous solution of sodium alginate.

[0040] The present invention also provides a method for preparing a low leakage and pollution geotube bag dredging conditioner, comprising the following steps:

[0041] S1. Add 200 kg of polyaspartic acid and 150 kg of sodium carboxymethyl cellulose into a mixed solution of 500 L of pure water according to a certain proportion and stir for 60 min.

[0042] S2, raising the temperature of the mixed solution to 100°C at a rate of 5°C / min and reacting for a period of time, the reaction time of the mixed solution is 4h;

[0043] S3, cooling the reaction product in S2 to 40-60°C, then adding 100 kg of amylopectin, maintaining stirring for 30 minutes, and then injecting 30 kg of cationic polyacrylamide emulsion, wherein the ionicity of polyacrylamide is 20%, into the reactant at a rate of 1 L / s, and cooling the temperature to 20-30°C to obtain product 1;

[0044] S4, controlling the temperature at 20-30°C, injecting 50kg of 10% aqueous solution of sodium alginate into the product 1 in S3 at a rate of 1-10L / s, and stirring the mixed solution after the injection. The stirring time of the mixed solution is controlled at 30-60min to obtain the geotube bag dredging conditioner.

[0045] When using the geotube bag silt cleaning conditioner, prepare the geotube bag silt cleaning conditioner into a 3% aqueous solution, add it into the pipeline for conveying sludge, mix it thoroughly and then pump it to the geotube bag through the pipeline for mud and water separation.

[0046] The parameters of geotube bag silt removal conditioner and ordinary PAM were compared. The low leakage pollution geotube bag silt removal conditioner and ordinary PAM were respectively prepared into 3% aqueous solution, added to the pipeline for conveying sludge, and fully mixed and pumped to the geotube bag through the pipeline for mud and water separation. The COD, ammonia nitrogen, total phosphorus and other parameters of the geotube bag filtrate were tested. After the geotube bag was left standing for 1 month, the solidified sludge was taken out of the bag and the moisture content parameters were tested.

[0047] Table 1 Comparison of geotube bag filtrate data after the test:

[0048]

[0049] Table 2 Comparison of moisture content of geotube bags after the test:

[0050] Serial number category Moisture content Remark 1 Raw mud moisture content 81％ 2 Moisture content of common PAM after use 63％ 3 The moisture content of this product after use 47％

[0051] From the filtrate data, it can be seen that under normal addition conditions, neither of the two agents will increase the pollutant index of the geotube bag filtrate. In comparison, the filtrate parameters of this product are the best and the decline is the highest. In addition, after one month of standing, the geotube bag using this product has the lowest moisture content, which has dropped to 47%, and has been completely solidified, which is much better than the ordinary PAM effect.

[0052] In summary, this agent can cooperate with each other to improve the surface charge of sludge and reduce capillary pressure, support the strength of flocs, and enhance the mud-water separation effect, thereby quickly and efficiently reducing the moisture content, and it also has a good effect on fermented sludge. In addition, the COD, ammonia nitrogen and other parameters of this product are relatively low, and leakage will not cause the corresponding indicators in the water body to rise, which is safer and more environmentally friendly.

[0053] It will be appreciated by those skilled in the art that the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways, even if such combinations and / or combinations are not explicitly described in the present invention. In particular, the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways without departing from the spirit and teachings of the present invention. All of these combinations and / or combinations fall within the scope of the present invention.

Claims

1. A low leakage and pollution geotube bag dredging conditioner, characterized by: The geotube bag dredging conditioner is composed of polyaspartic acid, polyacrylamide, sodium carboxymethyl cellulose, pullulan, sodium alginate and the balance is water; The composition weight ratio of the geotube bag dredging conditioner is: Polyaspartic acid: 10%-20%; Polyacrylamide: 1%-5%; Sodium carboxymethyl cellulose: 10%-30%; Amylopectin: 10%-30%; Sodium alginate: 5%-15%; The balance is water.

2. The low leakage and pollution geotube bag dredging conditioner according to claim 1 is characterized by: The polyacrylamide is a cationic polyacrylamide emulsion.

3. The low leakage and pollution geotube bag dredging conditioner according to claim 2 is characterized by: The ionicity of the cationic polyacrylamide emulsion is one or more of 10%, 20%, and 30%.

4. The low leakage and pollution geotube bag dredging conditioner according to claim 1 is characterized by: The sodium alginate is a 10% aqueous solution of sodium alginate.

5. A method for preparing a low leakage and pollution geotube bag dredging conditioner according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1. Add polyaspartic acid and sodium carboxymethyl cellulose in a certain proportion into a mixed solution of 500 L of pure water and stir; S2, raising the temperature of the mixed solution to 100°C at a rate of 5°C / min and reacting for a period of time; S3, cooling the reaction product in S2 to 40-60° C., then adding a certain amount of amylopectin, maintaining stirring for 30 min, and then injecting the cationic polyacrylamide emulsion into the reactant at a rate of 1 L / s, cooling the temperature to 20-30° C., to obtain product 1; S4, controlling the temperature at 20-30°C, injecting a 10% aqueous solution of sodium alginate into the product 1 in S3 at a rate of 1-10 L / s, and after the injection, stirring the mixed solution to obtain a geotube bag dredging conditioner.

6. The method for preparing a low leakage and pollution geotube bag dredging conditioner according to claim 5, characterized in that: In S1, the stirring time is 60 min.

7. The method for preparing a low leakage and pollution geotube bag dredging conditioner according to claim 5, characterized in that: In S2, the reaction time after the mixed solution is heated is 4 hours.

8. The method for preparing a low leakage and pollution geotube bag dredging conditioner according to claim 5, characterized in that: In S4, the stirring time of the mixed solution is controlled to be 30-60 min.

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