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CN-121974592-A - Flocculating and dewatering sludge anti-strength degradation additive, synchronous grouting material and preparation method thereof

CN121974592ACN 121974592 ACN121974592 ACN 121974592ACN-121974592-A

Abstract

The invention belongs to the technical field of inorganic gelatinizer additives, and particularly relates to a flocculating and dewatering sludge strength degradation-resistant additive, a synchronous grouting material and a preparation method thereof, wherein the flocculating and dewatering sludge strength degradation-resistant additive comprises, by mass, 0.1-2 parts of a strong electron acceptor, 0.1-1 part of a strong proton acceptor, 0.1-2 parts of a high-charge metal ion compound, and 90-180 parts of industrial solid waste, wherein the strong electron acceptor is persulfate, the strong proton acceptor is cesium hydroxide or/and rubidium hydroxide, the high-charge metal ion compound is at least one of ferric nitrate, ferric sulfate, aluminum nitrate or aluminum sulfate, and the industrial solid waste is common industrial solid waste and superfine industrial solid waste. The synchronous grouting material has the advantages of strong stability, excellent mechanical property, low cost, green, low carbon and the like, and is favorable for realizing the high added value utilization of dehydrated sludge waste.

Inventors

  • YANG YICAI
  • YU YANG
  • TIAN JIAWEI
  • FAN ZUOSONG
  • LIU HAOJIE
  • ZHOU HENG
  • GAO ZHENRU

Assignees

  • 青岛地铁集团有限公司
  • 山东省工业技术研究院
  • 山东大学

Dates

Publication Date
20260505
Application Date
20260123

Claims (10)

  1. 1. The additive is characterized by comprising, by mass, 0.1-2 parts of a strong electron acceptor, 0.1-1 part of a strong proton acceptor, 0.1-2 parts of a high-charge metal ion compound and 90-180 parts of industrial solid waste; the strong electron acceptor is persulfate; the strong proton acceptor is cesium hydroxide or/and rubidium hydroxide; the high-charge metal ion compound is selected from at least one of ferric nitrate, ferric sulfate, aluminum nitrate or aluminum sulfate.
  2. 2. The flocculating and dewatering sludge deterioration resistance additive according to claim 1 is characterized by comprising, by mass, 0.1-1 part of a strong electron acceptor, 0.1-1 part of a strong proton acceptor, 0.1-1 part of a high-charge metal ion compound and 100-180 parts of industrial solid wastes.
  3. 3. The flocculating and dewatering sludge deterioration resistant additive according to claim 1 or 2, wherein the industrial solid waste consists of general industrial solid waste and superfine industrial solid waste, wherein the general industrial solid waste is at least one of granulated blast furnace slag powder and phosphorus slag powder and at least one of red mud and steel slag powder; Preferably, the specific surface area of the granulated blast furnace slag powder is 500-600m 2 /kg; The specific surface area of the phosphorus slag powder is 500-600m 2 /kg; the specific surface area of the red mud is 850-950m 2 /kg; The specific surface area of the steel slag powder is 500-600m 2 /kg; The specific surface area of the silica fume is 18000-22000m 2 /kg; the specific surface area of the superfine granulated blast furnace slag powder is 750-850m 2 /kg; The specific surface area of the superfine fly ash is 850-950m 2 /kg.
  4. 4. The flocculating and dewatering sludge inspection additive of claim 3, wherein the industrial solid waste is a mixture of granulated blast furnace slag powder, steel slag powder and superfine fly ash, and the mass ratio of the granulated blast furnace slag powder to the steel slag powder to the superfine fly ash is 100-130:10-30:10-30.
  5. 5. The flocculating and dewatering sludge slag strength degradation resistant additive according to claim 3, wherein the industrial solid waste is a mixture of phosphorus slag powder, red mud and superfine granulated blast furnace slag powder, and the mass ratio of the phosphorus slag powder to the red mud to the superfine granulated blast furnace slag powder is 100-130:10-30:10-30.
  6. 6. The flocculating and dewatering sludge inspection additive of claim 3, wherein the industrial solid waste is a mixture of granulated blast furnace slag powder, red mud and silica fume, and the mass ratio of the granulated blast furnace slag powder, the red mud and the silica fume is 100-130:10-30:10-30.
  7. 7. The flocculating and dewatering sludge inspection additive of claim 1, wherein the persulfate is potassium persulfate or sodium persulfate.
  8. 8. A synchronous grouting material is characterized by comprising, by mass, 1000 parts of flocculated dehydrated sludge, 100-200 parts of cement, 90-185 parts of the strength degradation resistant additive according to any one of claims 1-7 and 440-600 parts of water.
  9. 9. The synchronous grouting material according to claim 8, comprising, by mass, 1000 parts of flocculated dehydrated sludge, 100-200 parts of cement, 100-183 parts of the strength degradation resistant additive and 450-600 parts of water.
  10. 10. The method for preparing the synchronous grouting material according to any one of claims 7 to 9, which is characterized by comprising the following steps: weighing flocculated and dehydrated sludge, cement, an additive for resisting strength degradation and water according to a proportion; fully mixing the weighed components, and mixing and stirring for not less than 3min; placing the mixed slurry in a slurry storage container for standby, and continuously stirring to prevent standing segregation.

Description

Flocculating and dewatering sludge anti-strength degradation additive, synchronous grouting material and preparation method thereof Technical Field The invention belongs to the technical field of inorganic gelatinizer additives, and particularly relates to a flocculating and dewatering sludge strength degradation resistant additive, a synchronous grouting material and a preparation method thereof. Background The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art. Underground engineering construction such as subway and sand washing operation produces a large amount of earth suspended matter waste water, and direct discharge of the waste water can pollute soil and water, so that the flocculating agent is generally adopted to cooperate with a filter press to quickly separate muddy water, water resources are recycled, and flocculating and dewatering sludge containing a large amount of flocculating agent is also produced. The large amount of sediment accumulation of dehydration can cause environmental problems such as water pollution, river blockage, polluted soil, harm human health, influence living environment, so the effective utilization of sediment of dehydration is urgent. The flocculated dehydrated sludge has extremely fine particles, which results in high water content and high viscosity. And the dehydrated sludge contains a large amount of flocculating agent, so that the synchronous grouting material is easy to be unable to solidify when the dehydrated sludge is matched with cement to prepare the synchronous grouting material. Therefore, the general treatment mode of flocculation dehydration sludge is a curing piling/backfilling mode, but the treatment mode occupies a great deal of precious land resources. Disclosure of Invention Aiming at the defects existing in the prior art, the invention aims to provide a flocculating and dewatering sludge anti-strength degradation additive, a synchronous grouting material and a preparation method thereof. The synchronous grouting material has the advantages of strong stability, excellent mechanical property, low cost, green, low carbon and the like, and is favorable for realizing the high added value utilization of dehydrated sludge waste. In order to achieve the above object, the present invention is realized by the following technical scheme: The invention provides a flocculating and dewatering sludge strength degradation resistant additive, which comprises, by mass, 0.1-2 parts of a strong electron acceptor, 0.1-1 part of a strong proton acceptor, 0.1-2 parts of a high-charge metal ion compound and 90-180 parts of industrial solid waste; the strong electron acceptor is persulfate; the strong proton acceptor is cesium hydroxide or/and rubidium hydroxide; The high-charge metal ion compound is selected from at least one of ferric nitrate, ferric sulfate, aluminum nitrate or aluminum sulfate; The industrial solid waste is common industrial solid waste (granulated blast furnace slag powder, phosphorus slag powder, red mud and steel slag powder) and superfine industrial solid waste (silica fume, superfine granulated blast furnace slag powder and superfine coal dust), and consists of one or more of the common industrial solid waste granulated blast furnace slag powder and phosphorus slag powder, one or more of the red mud and steel slag powder, and one or more of superfine industrial solid waste silica fume, superfine granulated blast furnace slag powder and superfine coal dust. In a second aspect, the invention provides a synchronous grouting material, which comprises, by mass, 1000 parts of flocculated dehydrated sludge, 100-200 parts of cement, 90-185 parts of the strength degradation resistant additive in the first aspect, and 440-600 parts of water. In a third aspect, the present invention provides a method for preparing the synchronous grouting material, comprising the steps of: Step one, raw materials are weighed, wherein the raw materials comprise dehydrated sludge, cement, an additive for resisting strength degradation and water; fully mixing the dehydrated sludge, cement and the strength degradation resistant additive with water, wherein the mixing and stirring time is not less than 3min; Step three, placing the mixed slurry in a slurry storage container for standby, and continuously stirring to prevent standing and segregation; And step four, pumping the slurry to a designated place by using professional pumping equipment and pipelines. The beneficial effects achieved by one or more embodiments of the present invention described above are as follows: (1) The additive for resisting strength degradation consists of a strong electron acceptor, a strong proton acceptor, a high-charge metal ion compound and industrial solid waste, breaks a flocculating net structure by breaking the flocculating net structure, breaks a flocculating agent macromolecular chain, and performs competiti