JP2001104998A - Fluid mud immediate effect solidifying agent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fluid mud immediate effect solidifying agent forming sound soil without destructing an ecosystem and immediately solidifying water- containing sludge so as to make the same possible to feed and withdraw. SOLUTION: A treatment agent prepared by mixing highly polymerized sodium polyacrylate, diatomaceous earth and fly ash is mixed and kneaded with an electrolytic flocculating binder prepared by compounding pure water, ammonium persulfate, calcium nitrate, phsphonic acid and dilute sulfuric acid. Sodium silicate is further mixed and kneaded with the kneaded mixture. By this constitution, the modification and solidification of soil are performed at the same time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention aims at facilitating the removal and removal of sludge of any property such as drowned sludge or industrial sludge in a dredging work for rivers, lakes and marshes, harbors, etc. by instantaneously solidifying and solidifying the sludge. The present invention relates to an extremely effective anti-drown soil quick-acting agent.

[0002]

2. Description of the Related Art Many sludges such as sludge are present in rivers, lakes, marshes, harbors and the like, and it is necessary to remove the sludge during dredging work. There was no problem, and it became a big problem and a big trouble in the work progress. That is, as the treatment agent for treating sludge, various kinds of treatment agents have been adopted in the past, but none of them consider the natural ecosystem. For example, soil treated with a treating agent becomes strongly alkaline, greatly destroys vegetation and aquatic ecosystems, and elutes nutrients, which are the main cause of water quality deterioration. That is, various nutrients are dissolved together with alkaline water by rainwater, etc.
It flows into spillways, rivers and lakes, causing environmental damage.
In addition, the amount of conventionally used treating agents is large,
The amount is as large as 60 to 120 kg / t, and the volume of the treated soil is increased, resulting in a large economical loss. In addition, industrial sludge, as represented by shochu sludge, is currently dumped or incinerated in an untreated state, and incineration is incomplete, causing a major cause of environmental destruction. ing.

[0003]

In order to remove sludge, it is desirable that sludge is easily transported, that is, solidified, and that the solidification be immediate. On the other hand, sludge accumulated in rivers, lakes and marshes is phosphorus, nitrogen,
It is composed of organic substances and eutrophic chlorides such as sludge, and has a low oxygen solubility (DO). As a result, the self-cleaning ability has been reduced, and the state has been reduced. This deposit is converted into sulfide, and phosphorus, nitrogen, iron sulfide, and other nutrients are eluted from the sulfide to generate various plankton and blue-green algae, thereby promoting deterioration of water quality. Therefore, it is necessary to restore sludge from lakes and marshes to a necessary underwater ecosystem in the natural world where the aquatic ecosystem can survive. Therefore, in the treatment of sludge from rivers, lakes, and the like, it is necessary to return the sludge in a reduced state to an oxidized state to prevent environmental destruction. In particular, the polluted sludge has an extremely low silica (sio) component, and the lack of this silica is the main cause of permanent sludge, and a sludge purification treatment for increasing this component is required.

[0004] The present invention has been made in view of the above-mentioned circumstances, and is intended to reform sludge soil in a silica-free state into healthy soil in an oxidized state and to solidify the sludge immediately, An object of the present invention is to provide a hard-to-drown soil quick-acting agent capable of greatly improving sludge removal and removal efficiency.

[0005]

In order to achieve the above object, the present invention provides a quick-acting solidifying agent comprising an electrolytic flocculating binder and a treating agent mixed with the electrolytic flocculating binder. , Pure water, ammonium persulfate, calcium nitrate, phosphonic acid, and dilute sulfuric acid in a predetermined weight ratio. The treating agent is a mixture of highly polymerized sodium polyacrylate, diatomaceous earth, and fly ash in a predetermined weight ratio. It constitutes the hardened drought soil quick-acting agent. Further, the present invention is characterized by a hard-to-drown soil quick-acting agent formed by mixing sodium silicate with the quick-acting agent comprising the electrolytic coagulation binder and the treating agent.

Further, the present invention is characterized in that the treating agent comprises a mixture of three kinds in a weight ratio of 40 to 60 g of highly polymerized sodium polyacrylate, 40 to 60 g of diatomaceous earth, and 20 to 30 g of fly ash. Features.
Further, the electrolytic cohesive bonding agent is characterized in that it is replaced with any one of aluminum sulfate, polyaluminum sulfate and ferric polysulfate.

In the present invention, slaked lime (calcium hydride) for adjusting pH during processing is mixed with the quick-acting solidifying agent comprising the electrolytic flocculating binder or its substitute and the treating agent in combination. It is characterized by that.

[0008] Highly polymerized sodium polyacrylate as a treating agent has a remarkable water absorbing power, whereby the solidification of the sludge is promoted immediately. However, highly polymerized sodium polyacrylate has the disadvantage of low hydrophobicity. Diatomaceous earth and fly ash are used to compensate for this. Diatomaceous earth and fly ash improve air permeability, hydrophobicity, water retention, and dispersibility. Therefore, by using these three types of treating agents, sludge can be quickly solidified and, at the same time, aggregate particles having air permeability, water retention, and hydrophobicity can be formed. In addition, by using the electrolytic coagulation binder, the reduced soil becomes the oxidized soil, the component of silica increases, and the soil can be reformed into healthy soil. Further, by using sodium silicate, improvement of silica-free in mud component and hardening of soil are further promoted. In addition, the pH can be freely adjusted by using slaked lime.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the hard-to-drown soil quick-acting agent of the present invention will be described in detail. First, the application of an electrolytic coagulation binder has been filed in Japanese Patent Application Nos. 11-1744 and 11-1797 by the same applicant, and is disclosed in detail therein. And the processing material will be described in detail. First, the electrolytic coagulation binder has the composition shown in the following [Table 1].

[0010]

[Table 1]

As shown in Table 1, the electrolytic coagulation binder was pure water,
It is composed of ammonium persulfate, calcium nitrate, phosphonic acid, dilute sulfuric acid and the like, and has, for example, a weight ratio shown in Table 1. The electrolytic coagulative binder is not limited to the one shown in Table 1. For example, any one of aluminum sulfate, polyaluminum sulfate, and ferric polysulfate may be used as a substitute. Is also good.

First, pure water is preferably fresh water such as groundwater, and desirably water containing no chlorine. Further, even if chlorine is mixed, it is necessary that the amount is very small. Ammonium persulfate, also known as ammonium peroxodisulfate, is mainly an oxidative bleaching agent, an acrylic resin polymerizer, and a flour modifier, and plays a leading role in promoting strong oxidizing activity of sulfide.
That is, it has an excellent ability to generate oxygen and ozone due to the oxidation activity in the sediment, easily generates free radicals in water, and plays a leading role in detoxification by oxidative decomposition of phosphorus, nitrogen and the like. Calcium nitrate is also known as lime nitrate,
It is mainly used as a water-soluble fertilizer, dyeing and refrigerant solvent, and functions as an accelerator for oxidative decomposition of sulfide. As mentioned above, the Lake Biwa Research Institute has published research results that show that only one drug is effective in purifying lake bottom mud.

Phosphonic acid is also known as etidron oxidation, and is mainly used as a scale inhibitor in water treatment, corrosion protection, peroxide stabilization, a coagulant, and a chelating agent for heavy metals. It functions as oxide sequestration by blocking and synthesizing heavy metal ions. There are cases where heavy metals are contained in mud depending on rivers and lakes, which is effective for detoxification. In addition, it exerts a synergistic effect as a concomitant drug with various drugs (large effect as a chelating agent). Dilute sulfuric acid, also called sulfuric acid, is effective for acidifying mud. As described above, the components of the electrolytic flocculating binder each have various functions, and the electrolytic flocculating binder composed of a mixture of these components is a purification treatment agent having the characteristics of each component. It has the function of On the other hand, sodium silicate is also called water glass, and is SiO ₂ itself. Used as detergent builder, soil hardening stabilizer, cement quick setting agent, ceramic agent, welding rod agent, etc. It functions as an improvement of silica-free in mud components and as a soil hardening accelerator. It improves lake bottom mud from the component basis. The following [Table 2] shows a comparison of each component of a lake and a marsh when the electrolytic coagulant binder of the above-mentioned components was used with that of a conventional one.
It can be seen that is greatly increased.

[0014]

[Table 2]

Next, the treatment agent in the present invention will be described. The treating agent is a highly polymerized product of acrylic acid and sodium acrylate, an aliphatic / organic polymer called high-polymerized sodium polyacrylate, and a diatomaceous compound (rock, earth mass) of diatomaceous earth (ore powder) and aqua. It consists of a mixture of three types of mesh (limestone). Note that fly ash is ash discharged from thermal power plants and the like.
Table 3 shows the weight ratios, scientific formulas, and the like thereof.

[0016]

[Table 3]

Highly polymerized sodium polyacrylate has a remarkable water absorption and water retention capacity that swells 100 to 1000 times when it comes into contact with water, and forms a hydrogel. Hydrogels exhibit a viscosity increase. As a water absorption mechanism, water is taken into gaps and porous portions of the gel, and retains a large amount of water (for example, 500 cc of water can be gelled and retained for 10 g as a water absorption retention force). In addition, in dredging mud treatment in which the present agent is added to mud of rivers and lakes, since the swollen gel is fine and weak, it fills gaps in soil and sand and forms a water-blocking layer. In other words, this agent has a remarkable water absorption retention power quickly and binds to the metal salt in the soil, and the constructed gel has the advantage of being insoluble, but it has poor drainage and drying, and becomes viscous during processing, It is inferior in uniform dispersibility and has a disadvantage of easily becoming a cage. Further, there is a disadvantage that the soil bearing capacity of the treated soil is weak, and at the same time, the rainwater is retained. The present agent has been conventionally used in disposable diapers, wastewater treatment agents for livestock products, compresses, various thickeners, freeze stabilizers for frozen foods, and the like.

Diatomaceous earth has a prominent water absorbing power as ore powder. The properties are porous white fine powder (porosity 90
%, Silica 88%, water absorption 280%), and is excellent in three phases of water retention, hydrophobicity and air permeability. It is mainly used for filtering soy sauce, sugar, water syrup, vegetable oil, and mineral oil as a filtering agent, and as a heat insulating and sound insulating material as a building material. It is also used as a cement mixture. The above-mentioned highly polymerized sodium polyacrylate has the above advantages,
There are disadvantages, but diatomaceous earth can remedy this disadvantage. Diatomaceous earth is made up of dead bodies of algae and consists of countless silicic acids (cells). One cell is about 30 microns, and its structure is a collection of round, needle-like, boat-like porous shells. It is a lightweight powder with a water absorption of 280%, silica of 88% and a porosity of 90%, and is excellent in air permeability, hydrophobicity, water retention and dispersibility. By synthesizing and blending this diatomaceous earth with highly polymerized sodium polyacrylate, the above-mentioned drawbacks such as charge neutralization, hydrophobicity, and viscosity can be improved, and air permeability can be imparted. By these means, the accuracy of the treatment soil, such as drying, can be improved.

Fly ash (coal ash) is a kind of artificial pozzolan and is of silica or alumino-silica. In the soil, it reacts with alkaline soil to form insoluble compounds and hardens. It has a porous structure and is excellent in water retention and hydrophobicity. In addition, it has a stable bearing capacity for compaction during dredging mud treatment, fixes a large amount of water as crystallization water inside the porous structure, and at the same time promotes the adsorption and fixation of silt particles (ultra-fine particles) and harmful components. Occurs. As advantages, it is excellent in three phases of air permeability, hydrophobicity and water retention, has a large mud reforming effect, and has the property of increasing the solidification strength with the passage of time by constructing an etorineline guide. In addition, it has a deodorizing effect by adsorbing and solidifying harmful components. On the other hand, there is a disadvantage that the added amount is large, the working efficiency is poor, there is no immediate solidification strength, and the treated soil is washed away by rainwater or the like. In addition, it has a disadvantage that it is not possible to quickly carry out the treated soil. The diatomaceous earth also has advantages and disadvantages similar to the fly ash. Fly ash has been conventionally used as ash cement, soil improvement material, and roadbed material. In addition,
Table 4 shows the components of diatomaceous earth and fly ash.

[0020]

[Table 4]

As described above, the treating agents compensate for each other's shortcomings and generate a rapid solidification reaction due to their synergistic effect, thereby constructing a soil that is friendly to the natural environment. In addition, the electrolytic flocculating binder combined with the treating agent having the above properties shows a strong charge neutralization reaction, completely destroys the hydrophilic group which is one of the characteristic defects of mud, and strongly compresses between mud particles. A binding reaction occurs, whereby water molecules between the particles are extruded (hydrophobic reaction), and the solidification strength of the aggregate due to the promotion of evaporation and drying increases with time.

Next, the features of the combination of the above-mentioned treating agent and the electrolytic coagulation binder will be described. 1) Problems such as fish eyes (mamako) can be solved by improving the viscosity and improving the uniform dispersibility during the processing operation. 2) Immediately absorb and solidify the floating water in the mud, making it possible to immediately carry out and remove the treated soil. 3) A single drop of water does not seep out during removal. 4) The aggregate particles of the treated soil are strong and insoluble due to the reaction bond with the metal salt of the reviver used in combination, and do not re-soil for long-term rainwater or the like. 5) The treated soil destroys the hydrophilic groups and builds an excellent three phase. In addition, PH is in the range of 6.0 to 7.0. 6) The ground bearing capacity is 1.3-
A range of 1.8 kg is preferred.

Next, an experimental example of the hard-to-drown soil quick-acting agent of the present invention will be described. First, the A method to be added per ton of dredged mud having a mud content of 60 to 70% will be described. In this case, 5 kg of the treating agent is added, and the powder is dispersed on average in the mud. On the other hand, the electrolytic flocculating binder (Reviver) sprays 5 liters of liquid into mud on average by a chemical resistant pump. The kneading and stirring use a small Yumbo. In addition, the mud was applied to the mud where floating water was accumulated in a state where the surface area was 70%. 1) Stirring: Lightly stir to achieve uniform mud concentration. 2) Addition of treatment agent: Spread as much as possible on the mud surface. 3) Stirring: Kneading and stirring are started while spraying the treating agent, and after 1 or 2 minutes from the start, slime is generated and a solidification reaction occurs. Stirring is continued for another 2-3 minutes. As a result, the floating water completely disappears and solidifies, but soft drowning leaves slime. 4) Spraying electrolytic coagulant binder: Spray as average as possible. 5) Stirring: Stir while spraying the electrolytic flocculating binder. One to two minutes after the stirring, a solid-particle reaction occurs. If the stirring is further continued, strong aggregated particles are formed after two to three minutes, the slime is completely eliminated, and the aggregated solidified soil is obtained.

The above processing time is about 6 to 10 minutes. Even if this treated soil is immediately poured into water, the water does not become turbid and the aggregate particles do not dissolve at all. Further, even after being immersed in water for 10 hours, the same state is maintained without any change. Therefore, immediately after the completion of the processing work, it can be carried out by a dump vehicle or the like. In addition, although the above is an experiment about sludge soil, it was also applied to shochu sludge and slaughterhouse sludge, and it was confirmed that the same effect was obtained. It was also confirmed that the treated soil could be dewatered by a screw dewatering machine.

[0025]

According to the present invention, sludge containing a large amount of aqueous solution is immediately solidified to make it ready for transportation and removal, and the sludge in a reduced state is oxidized and reformed to destroy an ecosystem. And clarified soil can be obtained. In addition, the silica-free state can be improved, and a healthy soil can be constructed.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C09K 17/22 C09K 17/22 P 17/42 17/42 P 17/48 17/48 P // C09K 103 : 00 103: 00 (71) Applicant 599141216 Ichizo Kono Maruyo Copto A A-204, No. 1161, Kamio, Ageo-shi, Saitama (72) Inventor Kayohiko Tanimoto 4053-2 Kannahashirai, Sodegaura-shi, Chiba Pref. Kennai (72) Inventor Hideo Yara 1-16-2 Makishi, Naha City, Okinawa Prefecture (72) Inventor Hiroshi Nakagawa 4-17-3 Higashikasai, Edogawa-ku, Tokyo Inside Nawa Sangyo Co., Ltd. (72) Inventor Uehara Yoshiyan 3-5-7-421, Harumi, Chuo-ku, Tokyo (72) Inventor Koichi Ichizou, 1161 Kamio City, Saitama Prefecture DA23 DA33 DA39 D A54 DA64 DB28 4H026 CA02 CA03 CA06 CB01 CB03 CB05 CB07 CB08 CC01

Claims (5)

[Claims] 1. A quick-acting solidifying agent comprising an electrolytic flocculating binder and a treating agent mixed therein, wherein the electrolytic flocculating binder comprises pure water, ammonium persulfate, calcium nitrate, phosphonic acid and dilute sulfuric acid. Wherein the treating agent is a highly polymerized sodium polyacrylate,
A hard-to-drown soil quick-acting agent comprising diatomaceous earth and fly ash mixed at a predetermined weight ratio. 2. The hard-to-drown soil quick-acting agent according to claim 1, which is formed by mixing sodium silicate with the quick-acting solidifying agent comprising the electrolytic coagulation binder and the treating agent. 3. A treatment agent comprising a mixture of three kinds in a weight ratio of 40 to 60 g of highly polymerized sodium polyacrylate, 40 to 60 g of diatomaceous earth, and 20 to 30 g of fly ash. Item 3. The hard-to-drown soil quick-acting agent according to Item 1 or 2. 4. The method according to claim 1, wherein the electrolytic coagulation binder is replaced with any one of aluminum sulfate, polyaluminum sulfate and ferric polysulfate. A quick-acting hardening agent for drowning soil. 5. A slaked lime (calcium hydride) for adjusting pH during processing is mixed with the quick-acting solidifying agent comprising the electrolytic coagulation binder or a substitute thereof and the processing agent. The hard-to-drown soil quick-acting agent according to claim 1.