Construction method for rapid separation of sludge and water of engineering waste mud

Abstract

The application discloses a construction method for quickly separating mud and water from engineering waste mud. The method is characterized in that: the engineering waste mud is pretreated by adding solid calcium chloride material and liquid sodium silicate material before pressure filtration, so that mud gel is formed, the pressure filtration efficiency is effectively improved, the water content of the mud cake is lower, and the mud cake is easier to be shaped. The application has the advantages of convenient construction operation, clear process flow, no need of special equipment, good universality, low cost, positive effects on guaranteeing construction progress, protecting the environment, recycling resources and the like.

Description

Technical Field

[0001] This invention relates to the field of civil engineering technology, specifically to a method for rapid mud-water separation of engineering waste mud. Background Technology

[0002] With the accelerated pace of urban and transportation construction, especially underground space construction, the amount of waste mud generated is increasing rapidly. Waste mud contains a large amount of rock debris, clay minerals and impurities, and has a very high viscosity, making it difficult to settle naturally and unable to be discharged directly. If waste mud is not properly treated, it will not only waste materials, but also cause a series of serious environmental problems such as soil compaction, river blockage, and exacerbation of soil erosion.

[0003] Solving the problem of waste mud treatment and ensuring its proper disposal, adhering to the principles of "green, environmentally friendly, and energy-saving," involves finding chemical agents suitable for the local mud properties and combining them with flexible and adjustable rapid waste mud treatment technologies and equipment. This approach addresses mud pollution at its source, ensuring the harmless treatment of existing pollution sources. It is of great significance for green construction and ecological environmental protection. Achieving "non-toxic, harmless, low-cost, and industrially reusable" waste mud improves the level of civilized construction and represents a comprehensive approach to industrial pollution source management. This minimizes harm to humanity and nature, maximizes environmental and economic benefits, and achieves harmony between humanity and nature.

[0004] Currently, the main methods for treating waste mud in China are solidification and solid-liquid separation, with solid-liquid separation being the primary method. However, further research is needed on treatment methods for construction waste mud. Finding an economical, reasonable, and efficient mud treatment method is crucial. Summary of the Invention

[0005] The purpose of this invention is to provide a rapid mud-water separation construction method for engineering waste mud, so as to solve the technical problem that the waste mud has high viscosity and is difficult to settle naturally in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] This invention provides a rapid mud-water separation method for engineering waste mud, characterized by comprising the following steps:

[0008] S1. Waste mud from the project is stored in a waste mud tank and pumped into a mixing tank.

[0009] S2. Liquid and solid pumping feed devices are respectively installed at the pumping outlet;

[0010] S3. Waste engineering mud is pumped from the waste mud tank into the mixing tank; solid calcium chloride water-absorbing material and liquid sodium silicate gel material are simultaneously added to the mixing tank through the feeding device;

[0011] S4. The mixer is located above the mixing tank and is inserted into the mixing tank to the designed depth to mix the engineering waste mud and bind and solidify the added calcium chloride and sodium silicate materials into a whole.

[0012] S5. The gel-like engineering waste mud enters the filter press for dewatering and forms a low-moisture mud cake.

[0013] The technical effects of adopting the above technical solution are as follows: by adding solid calcium chloride and liquid sodium silicate materials to pre-treat the engineering waste mud before filter pressing, mud gel is formed, which can effectively improve the filter pressing efficiency and effect and ensure the construction progress; the water after filter pressing can be recycled, and the mud cake can be used as backfill soil or planting soil.

[0014] Optionally or preferably, the mud pump outlet has a liquid and solid pumping feed device; solid calcium chloride water-absorbing material and liquid sodium silicate gel material enter the mixing tank through the grouting pipe feed device.

[0015] Optionally or preferably, the solid calcium chloride water-absorbing material and the liquid sodium silicate gel material bind and solidify the engineering waste mud into a whole through water absorption and chemical reaction, forming an engineering waste mud gel; at the same time, the engineering waste mud gel is concentrated and pressed by a filter press to form a dried mud cake.

[0016] Based on the above technical solution, the embodiments of the present invention can produce at least the following technical effects:

[0017] This invention provides a rapid mud-water separation construction method for engineering waste mud. By adding solid calcium chloride and liquid sodium silicate, the engineering waste mud is pretreated before pressure filtration to form mud gel, which can effectively improve the pressure filtration efficiency and effect and ensure the construction progress. The water after pressure filtration can be recycled, and the mud cake can be used as backfill soil or planting soil. Attached Figure Description

[0018] Figure 1 A schematic diagram of the construction method for rapid mud-water separation of engineering waste mud according to the present invention.

[0019] In the diagram: 1. Mixing tank; 2. Liquid and solid feeding device; 3. Solid calcium chloride material; 4. Liquid sodium silicate material tank; 5. Slurry gel; 6. Filter press; 7. Dried mud cake; 8. Slurry pump; 9. Waste slurry tank; 10. Waste slurry; 11. Wire mesh; 12. Filter cloth; 13. Mixer; 14. Slurry gel concentration section; 15. Slurry gel pressing section; 16. Slag tank; 17. Conveying pump. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figure 1 A method for rapid mud-water separation of engineering waste mud includes the following steps:

[0022] S1. Waste mud from the project is stored in a waste mud tank and pumped into mixing tank 1.

[0023] S2. Liquid and solid pumping feed devices are respectively installed at the pumping outlet;

[0024] S3. Engineering waste mud is pumped from the waste mud tank into the mixing tank 1; solid calcium chloride water-absorbing material tank 3 and liquid sodium silicate gel material tank 4 are simultaneously added to the mixing tank through the feeding device;

[0025] S4. The mixer is located above the mixing tank and is inserted into the mixing tank to the designed depth to mix the engineering waste mud and bind and solidify the added calcium chloride and sodium silicate materials into a whole.

[0026] S5. The gel-like engineering waste mud enters the filter press for dewatering and forms a low-moisture mud cake 7.

[0027] As an optional implementation, the outlet of the mud pump 8 has a liquid and solid pumping feed device 2; the solid calcium chloride water-absorbing material tank 3 and the liquid sodium silicate gel material tank 4 enter the mixing tank 1 through the grouting pipe feed device.

[0028] As an optional implementation, the solid calcium chloride water-absorbing material and the liquid sodium silicate gel material bind and solidify the engineering waste mud into a whole through water absorption and chemical reaction, forming engineering waste mud gel 5; at the same time, the engineering waste mud gel is concentrated 14 and pressed 15 under the action of filter press 6 to form dried mud cake 7.

[0029] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for rapid mud-water separation of engineering waste mud, characterized in that, Includes the following steps: S1. Waste mud from the project is stored in a waste mud tank and pumped into a mixing tank (1). S2. Liquid and solid pumping feed devices are respectively installed at the pumping outlet; S3. The engineering waste mud is pumped from the waste mud tank into the mixing tank (1). The solid calcium chloride water-absorbing material tank (3) and the liquid sodium silicate gel material tank (4) are simultaneously added to the mixing tank through the feeding device. The solid calcium chloride water-absorbing material and the liquid sodium silicate gel material bind and solidify the engineering waste mud into a whole through water absorption and chemical reaction, forming engineering waste mud gel (5). S4. The mixer is located above the mixing tank and is inserted into the mixing tank to the designed depth to mix the engineering waste mud and cement and solidify it into a whole with the added calcium chloride and sodium silicate materials. The engineering waste mud gel is concentrated (14) and pressed (15) by the filter press (6) to form a dried mud cake (7). S5. The gel-like engineering waste mud enters the filter press for dewatering and forms a low-moisture mud cake (7).

2. The construction method for rapid mud-water separation of engineering waste mud according to claim 1, characterized in that, The outlet of the mud pump (8) has a liquid and solid pumping feed device (2); the solid calcium chloride water-absorbing material tank (3) and the liquid sodium silicate gel material tank (4) enter the mixing tank (1) through the grouting pipe feed device.

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