CN114180812A

CN114180812A - Curing agent for rapid hardening treatment of soil bodies such as sludge and the like, preparation method and application

Info

Publication number: CN114180812A
Application number: CN202010965129.1A
Authority: CN
Inventors: 简恩来
Original assignee: Nanjing Beigu Engineering Materials Co ltd
Current assignee: Nanjing Beigu Engineering Materials Co ltd
Priority date: 2020-09-15
Filing date: 2020-09-15
Publication date: 2022-03-15

Abstract

The invention discloses a curing agent for rapid hardening treatment of soil bodies such as silt and the like, a preparation method and application thereof, wherein the curing agent for rapid hardening treatment of soil bodies such as silt comprises a master batch and auxiliary materials in a mass ratio of 1:10, firstly, the auxiliary materials obtained from local industrial byproducts are subjected to impurity removal and purification, different components in the auxiliary materials are mixed according to the mass ratio, then, the obtained core master batch is mixed with the auxiliary materials to obtain the curing agent, and then, silt is collected and subjected to water leaching treatment for two days by utilizing a mechanical dredging or hydraulic flushing dredging method; then according to the experimental proportion, stirring a curing agent and the drained sludge by using a digging machine, and tightly closing for 12-24 hours; finally, stirring the mixture subjected to tight placement for 3-4 times again, solidifying and utilizing the sludge after the mixture is solidified to reach a set strength, ensuring the integral solidification effect, and being suitable for rapid solidification treatment of soil bodies such as muck, slurry, industrial byproducts and the like.

Description

Curing agent for rapid hardening treatment of soil bodies such as sludge and the like, preparation method and application

Technical Field

The invention relates to the technical field of soil hardening treatment, in particular to a curing agent for rapid hardening treatment of soil such as sludge and the like, a preparation method and application thereof.

Background

According to international and domestic sludge treatment methods, three types of physical dehydration, heating sintering and chemical curing are mainly adopted at present, the former two types of methods are suitable for occasions with small treatment amount and high treatment degree, the methods are not suitable for large-scale treatment on site, the treatment cost is relatively high, the characteristics of high water content and low strength of the sludge can be effectively improved through the curing treatment of chemical agents, cured products can be used as earth backfill materials to replace sandstone and clay to be used in work construction, embankment or embankment addition and road engineering, but the transportation cost occupies a large proportion at present, if finished curing agents are adopted for transportation, finished curing agents are purchased from other places and transported to the construction site, and the total cost is thousands of yuan/ton. In the early engineering practice, construction enterprises choose enterprises from other places to purchase finished soil curing agents, and when cement is produced, construction is carried out in a multi-aspect comparison mode, and the fact that the cost of the soil curing agents is too high although the soil curing agents meet design requirements is found, and the cost of the cement is low but cannot meet engineering requirements, so that the whole curing effect is not ideal.

Disclosure of Invention

The invention aims to provide a curing agent for rapid hardening treatment of soil bodies such as sludge and the like, a preparation method and application thereof, and the curing agent can ensure the whole curing effect.

In order to achieve the above object, in a first aspect, the present invention provides a method for preparing a curing agent for rapid hardening treatment of soil such as sludge, comprising:

removing impurities and purifying the obtained auxiliary materials, and mixing according to a mass ratio;

and mixing the obtained master batch with the auxiliary materials to obtain the curing agent.

Wherein, carry out edulcoration and purification to the auxiliary material who obtains to mix according to the mass ratio, include:

filtering the obtained auxiliary materials to remove impurities, adopting various different purification measures to purify various components in the auxiliary materials, and stirring and mixing the components in the auxiliary materials.

Wherein, mix the masterbatch that obtains with the auxiliary material, obtain the curing agent, include:

and respectively feeding the obtained master batch and the auxiliary materials into a stirrer according to the mass ratio of 1:10, and mixing and stirring for 10 to 20 minutes to obtain the powdery curing agent.

In a second aspect, the invention provides a curing agent for rapid hardening treatment of soil bodies such as silt, which comprises a master batch and an auxiliary material in a mass ratio of 1:10, wherein the master batch comprises expanded resin, water glass, diatomite, polyacrylamide and magnesium perchlorate, and the mass ratio of the expanded resin, the water glass, the diatomite, the polyacrylamide and the magnesium perchlorate is 25:9:12:10: 8.

The auxiliary materials comprise pulverized coal, cement, fluorgypsum, quick lime, caustic soda and aluminum sulfate, and the mass ratio of the pulverized coal, the cement, the fluorgypsum, the quick lime, the caustic soda and the aluminum sulfate is 40:20:10:10:9: 8.

The auxiliary material also comprises egg shells, and the ratio of the egg shells to the quick lime is 1: 1.

In a third aspect, the present invention provides an application of a curing agent for rapid hardening treatment of soil such as sludge, which is applied to curing of soil such as sludge, and includes:

collecting sludge and carrying out draining treatment for two days by using a mechanical dredging or hydraulic flushing dredging method;

according to the experimental proportion, stirring a curing agent and the drained sludge by using a digging machine, and tightly closing for 12-24 hours;

and stirring the mixture subjected to tight placement for 3-4 times again, solidifying to reach a set strength, and then performing solid filling utilization on the sludge.

The curing agent for rapid hardening treatment of soil bodies such as silt comprises a master batch and auxiliary materials in a mass ratio of 1:10, firstly, the auxiliary materials obtained from local industrial byproducts are subjected to impurity removal and purification, different components in the auxiliary materials are mixed according to the mass ratio, then, the obtained core master batch and the auxiliary materials are mixed and ground to obtain the curing agent, and then, silt is collected and subjected to water leaching treatment for two days by using a mechanical dredging or hydraulic flushing dredging method; then according to the experimental proportion, stirring a curing agent and the drained sludge by using a digging machine, and tightly closing for 12-24 hours; finally, stirring the mixture subjected to tight placement for 3-4 times again, solidifying and utilizing the sludge after the mixture is solidified to reach a set strength, and ensuring the integral effect of solidification.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic step diagram of a method for preparing a curing agent for rapid hardening treatment of soil such as sludge provided by the invention.

FIG. 2 is a schematic diagram of the steps of the application of the curing agent for rapid hardening treatment of soil such as silt provided by the invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1, the present invention provides a method for preparing a curing agent for rapid hardening treatment of soil such as sludge, comprising:

s101, removing impurities and purifying the obtained auxiliary materials, and mixing according to a mass ratio.

Specifically, the auxiliary materials are extracted from local industrial byproducts needing sludge solidification, the acquisition is convenient, the price is moderate, the transportation cost of the auxiliary materials is reduced, unnecessary particle impurities and the like inevitably exist in the industrial byproducts, so that the impurities in the required auxiliary material components need to be removed, the cleanness of the auxiliary materials is ensured, the purity of the obtained auxiliary material components needs to be ensured in order to ensure the solidification effect of the obtained curing agent, and the auxiliary materials need to be purified, for example, caustic soda is extracted, the obtained caustic soda powder is dissolved in saturated salt water after impurity removal for filtration and evaporation, and caustic soda solids with higher purity are obtained after drying, and a specific extraction method needs to be set according to specific components.

S102, mixing the obtained master batch with the auxiliary materials to obtain the curing agent.

Specifically, the auxiliary materials can be prepared by using local industrial byproducts, the core master batch of the curing agent needs to be purchased from a manufacturer, the purchase and transportation cost only needs to be spent on the master batch, the purchase cost and the transportation cost are reduced, the purchased master batch and the auxiliary materials are weighed according to the mass ratio of 1:10 and then are sent into a stirrer together to be mixed and stirred for about half an hour, so that the master batch and the auxiliary materials can be fully and uniformly mixed, the powder output from the stirrer is the required powdery curing agent, the transportation cost and the purchase cost are reduced, the production process of the curing agent and the generation amount of the required curing agent can be effectively controlled, and the overall effect of the curing agent is ensured.

The method further comprises the following steps:

and drying and storing the obtained master batch and the auxiliary materials.

The masterbatch does not damp, consequently with the auxiliary material need dry before mixing, also can dry the auxiliary material, effectively guarantees the masterbatch with the granularity of auxiliary material in the grinding process, and guarantee the masterbatch with the auxiliary material can not take place chemical reaction at the in-process that the stirring mixes, guarantees the solidification effect of curing agent.

The invention provides a curing agent for rapid hardening treatment of soil bodies such as silt, which comprises a master batch and an auxiliary material in a mass ratio of 1:10, wherein the master batch comprises an expansion resin, water glass, diatomite, polyacrylamide and magnesium perchlorate, and the mass ratio of the expansion resin to the water glass to the diatomite to the polyacrylamide to the magnesium perchlorate is 25:9:12:10: 8.

In this embodiment, the curing agent for rapid hardening treatment of soil bodies such as sludge and the like comprises a master batch and an auxiliary material in a mass ratio of 1:10, the master batch comprises an expansion resin, water glass, diatomite, polyacrylamide and magnesium perchlorate, the mass ratio of the expansion resin, the water glass, the diatomite, the polyacrylamide and the magnesium perchlorate is 25:9:12:10:8, the auxiliary material comprises pulverized coal, cement, fluorgypsum, quicklime, caustic soda and aluminum sulfate, the mass ratio of the pulverized coal, the cement, the fluorgypsum, the quicklime, the caustic soda and the aluminum sulfate is 40:20:10:10:9:8, the auxiliary material further comprises an egg shell, and the ratio of the egg shell to the quicklime is 1:1, wherein the pulverized coal comprises a plurality of dense particles, the particle size of which is very small, and hydration can occur, in addition to this, porous structural substances are also present. The fly ash contains some metal oxides which can react with water and therefore can absorb water. The fly ash can be well filled in pores in the expanded graphite, and can be used as a secondary parasitic carrier of smaller particles due to the existence of a porous structure in the fly ash. When the fly ash absorbs the water of the water in the pores of the expanded graphite, two modes of physical water absorption and chemical water absorption exist. Because the fly ash is used for being parasitic in the expanded graphite, the use amount of the fly ash is not suitable to be more and is less than that of the expanded graphite; the intumescent resin serves to absorb excess water in the sludge that is not absorbed by the other components of the curing agent. Because expandable graphite is used mainly as a parasitic carrier for other water-absorbing substances, its water-absorbing capacity is limited. For sludges with different water contents, this is not entirely true. In order to adapt to the sludge with wider water content range, a certain amount of expansion resin is added to supplement the expandable graphite. But the expanded resin is soft and loose after absorbing water, which can weaken the hardness of the sludge, namely, offset the hardness influence of the expanded graphite on the sludge. In order to enhance the hardness of the sludge, therefore, water glass is added as a hardness adjustment of the sludge. The water glass can absorb a part of water at the same time; the quicklime is mainly used for absorbing water and generating a large amount of heat, so that the sludge is in an environment with higher temperature, the higher temperature is beneficial to improving the chemical reaction speed and effect among particles, and the evaporation of water can be accelerated. It is also used to adjust the acidity of the sludge to make the environment alkaline. When the quicklime particles exist in the pores of the expanded graphite, the quicklime particles can absorb moisture diffused from the surface of the expanded graphite and react with the expanded graphite to generate heat, and the heat energy evaporates the surrounding moisture, so that the diffusion speed of the moisture in the pores of the expanded graphite can be accelerated in the process, and other water-absorbing substances can absorb the moisture; the caustic soda can also be potassium hydroxide powder, and clean egg shells are added to increase the calcium content in the curing agent, so that when the curing agent reacts with the sludge, the deconstruction tissue of the sludge is changed, and the sludge and water are separated. Due to the change of the structure of the sludge, the treated sludge can not be converted into a muddy water state again. When the curing agent is mixed into the sludge, the curing agent can react with the moisture in the sludge to generate needle-shaped crystals (mainly comprising ettringite) which exist in gaps of a soil particle structure and quickly generate flocculate precipitation, so that the sludge with high water content can quickly realize the separation and the deposition of water and solid particles, and the overall cost of the curing agent can be effectively reduced and the overall curing effect can be ensured according to the preparation method of the curing agent.

Referring to fig. 2, the present invention provides an application of a curing agent for rapid hardening treatment of soil such as sludge, which is applied to curing of soil such as sludge, and includes:

s201, collecting the sludge and carrying out draining treatment for two days by using a mechanical dredging or hydraulic flushing dredging method.

Specifically, the sludge must be transported to the draining pond for solidification at a deeper part of the sludge. The sludge collection adopts two modes of mechanical dredging and hydraulic flushing dredging. Mechanical dredging is used for removing bank sludge, and a digging machine, a ship digging machine, a loader and a self-dumping truck are adopted to cooperate to transport the sludge to a draining pond through 4-5 times of dumping; the hydraulic flushing dredging method mainly comprises the steps of intercepting the position where a excavator can not enter, draining water, basically draining accumulated water in the dredging channel, stirring by adopting stirring and sucking equipment, draining and dredging, and assisting by workers by using a high-pressure water gun beside the stirring and sucking equipment.

The hydraulic flushing dredging device has the advantages that dredging and conveying of sludge are completed at one time, dredging efficiency is high, operation is simple and convenient, pipeline conveying distance can reach kilometers, the problem of secondary pollution in the process of sludge transportation is avoided, in addition, stirring and sludge suction equipment is small in size, and transportation and dismounting are both very convenient. The silt is collected in the draining tank for preliminary draining, the time is generally 2 days, the content of water in the silt can be effectively reduced, and the subsequent curing effect is ensured.

S202, according to the experimental proportion, stirring the curing agent and the drained sludge by using a digging machine, and tightly closing for 12-24 hours.

Specifically, after sludge is naturally drained in a draining pond for 2 days, curing agents are manually thrown and added according to experimental proportions, the using amount of the curing agents is determined by experiments, and after a digging machine or a ship digging machine or a special machine digs, stirs and mixes for 2-3 times, the digging machine or the ship digging machine or the special machine is tightly placed for 12-24 hours, so that the covering of the piled sludge is well done, wherein the used curing agents comprise the following components: the curing agent can be used for curing the sludge by purchasing a curing master batch from a professional curing agent company and purchasing purified auxiliary materials from local industrial byproducts and mixing and stirring the materials locally, so that the purchase cost of the curing agent is reduced, the manufacturing process and the production of the curing agent can be controlled, the curing agent and the sludge can be fully mixed by digging for multiple times, the curing effect on the sludge is ensured, and the covering arrangement can ensure that various chemical components in the curing agent react with the sludge for enough time, so that the curing effect can be ensured.

And S103, stirring the mixture subjected to tight placement for 3-4 times again, solidifying to a set strength, and then performing solid filling utilization on the sludge.

Specifically, before the solidified sludge is transported outside, the solidified sludge is turned and stirred for 3-4 times, and after the solidified sludge is formed and reaches a certain strength, a digging machine, digging, loading and transporting outside are adopted according to the solid filling position. The method is also suitable for soil body solidification of soil, mud, slag soil, industrial byproducts and the like, and is used for environmental engineering, highway engineering, hydraulic engineering and mine engineering.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A preparation method of curing agent for rapid hardening treatment of soil body such as sludge and the like is characterized by comprising the following steps:

2. The preparation method of the curing agent for rapid hardening treatment of soil such as sludge and the like according to claim 1, wherein the obtained auxiliary materials are subjected to impurity removal and purification and are mixed according to mass ratio, and the preparation method comprises the following steps:

3. The method for preparing the curing agent for the rapid hardening treatment of the soil body such as the sludge and the like according to claim 2, wherein the curing agent is obtained by mixing the obtained master batch with the auxiliary material, and comprises the following steps:

4. A curing agent for rapid hardening treatment of soil such as sludge and the like is characterized by comprising:

the curing agent for rapid hardening treatment of soil bodies such as sludge and the like comprises a master batch and auxiliary materials in a mass ratio of 1:10, wherein the master batch comprises expansion resin, water glass, diatomite, polyacrylamide and magnesium perchlorate, and the mass ratio of the expansion resin to the water glass to the diatomite to the polyacrylamide to the magnesium perchlorate is 25:9:12:10: 8.

5. The curing agent for rapid hardening treatment of soil body such as sludge according to claim 4,

6. The curing agent for rapid hardening treatment of soil mass such as sludge according to claim 5,

7. The application of the curing agent for the rapid hardening treatment of soil bodies such as silt is applied to the solidification of the soil bodies such as silt, and is characterized by comprising the following steps of: