Preparation method of fly ash-based soft soil curing agent

Abstract

The invention provides a preparation method of a fly ash-based soft soil curing agent, and relates to the technical field of soft soil treatment.The preparation method comprises the following steps that 1, fly ash is dried to remove water and impurities in the fly ash; 2, cement and lime are ground and stirred, and the polyacrylamide organic polymer material is preheated; 3, adding the pretreated fly ash, cement, lime and an organic polymer material into a mixing machine according to a certain proportion, and starting the mixing machine for mixing and stirring; 4, in the mixing process, quantitative water is gradually added to serve as an auxiliary, the use amount of the water is 10%-20% of the total use amount of all the raw materials, the activity of the fly ash and the strength and stability of soil are improved, it is guaranteed that the multiple raw materials are evenly mixed, the soft soil curing agent with the fly ash as the raw material can consume the storage amount of the fly ash, and the cost is reduced. The land occupation of the fly ash and the pollution to the environment are reduced, the manufacturing cost of the curing agent can be reduced, and meanwhile, the soil is improved and repaired.

Description

Technical Field

[0001] The invention relates to the technical field of soft soil treatment, and in particular to a method for preparing a fly ash-based soft soil curing agent. Background Art

[0002] Soft soil solidifying agent refers to an inorganic hydraulic cementing material used to solidify soft soil and other fine-grained soil. After being fully mixed with the soil, the solidifying agent and the soft soil can be evenly mixed through the physical and chemical reactions between its own components and between the soil, and solidified soil with sufficient strength can be formed through the physical and chemical reactions between the solidifying agent and the soft soil. It is a very widely used type of soft soil treatment technology, widely used in foundation treatment of industrial and civil buildings, roadbed treatment of highways and railways, foundation treatment of ports and docks, water-stop curtains for dams and deep foundation pits, solidification of dredged silt filling sites, filling of underground caves and mine goafs, solidification treatment and application of contaminated soil, industrial silt, river silt, tailings mud, and construction waste, etc.

[0003] Fly ash is the powdery residue discharged from the boiler after the combustion of coal powder. It is a loose solid aggregate and the main solid waste discharged by coal-fired power plants. With the development of the power industry, the fly ash emissions from coal-fired power plants have increased year by year, becoming one of the largest industrial waste residues in my country. If a large amount of fly ash is not treated, it will produce dust and pollute the atmosphere; if it is discharged into the water system, it will cause river siltation, and the toxic chemicals in it will also cause harm to humans and organisms. It not only occupies a large amount of land, but also harms the environment. The problem of fly ash waste accumulation has become one of the important factors restricting the development of power plants.

[0004] Through the collection of relevant domestic and foreign literature and on-site investigation and analysis, it was found that fly ash plays a great role in soil improvement and restoration. A preparation method of a fly ash-based soft soil solidifier is needed to overcome the shortcomings in current practical applications. Summary of the invention

[0005] The invention provides a method for preparing a fly ash-based soft soil solidifying agent, which is used to solve the defects in the prior art.

[0006] The present invention provides a method for preparing a fly ash-based soft soil solidifying agent, comprising the following steps:

[0007] Step 1: Dry the fly ash to remove moisture and impurities;

[0008] Step 2: Grind and stir cement and lime to preheat the polyacrylamide organic polymer material;

[0009] Step 3: Add the pretreated fly ash, cement, lime and organic polymer materials into a mixer according to a certain proportion, and start the mixer to mix and stir;

[0010] Step 4: During the mixing process, gradually add a certain amount of water as an auxiliary agent, and the amount of water used is 10%-20% of the total amount of all raw materials.

[0011] Preferably, in step 1, the drying temperature is controlled at 105° C.-115° C., and the drying time is 1 h-3 h.

[0012] Preferably, the amount of fly ash added during stirring in step three is not less than 20% of the total mass, and the stirring time is controlled within 20-30 minutes.

[0013] Preferably, steps 1 to 4 are all performed based on a preparation device, and the preparation device includes a fly ash discharger, a grinding discharger, and a mixer, and the fly ash discharger and the grinding discharger are arranged on the top of the mixer.

[0014] Preferably, the fly ash discharger includes a discharge frame, a feed port is provided at the top of the discharge frame, two rotating shafts 1 are horizontally arranged in parallel in the discharge frame below the feed port, the two rotating shafts 1 rotate in opposite directions, one end of the two rotating shafts 1 extends out of the discharge frame, and bevel gears 1 are respectively provided on the ends of the two rotating shafts 1 extending out of the discharge frame, a roller is provided on the part of the rotating shaft 1 in the discharge frame, a motor 1 is provided outside the discharge frame, a rotating shaft is provided through a coupling at the output end of the motor 1, a bevel gear 2 is provided on the top of the rotating shaft, the two bevel gears 1 are meshed with the bevel gear 2 for transmission, and a discharge port connected to the mixer is provided at the bottom of the discharge frame.

[0015] The cam is provided with a plurality of holes, and the two ends of the cam are connected with a plurality of rollers at the inner wall of the cam, and the two rollers are connected with a plurality of rollers at the inner wall of the cam, and the rollers are connected with the plurality of rollers at the inner wall of the cam.

[0016] Preferably, the grinding and discharging machine comprises a grinding frame, a filling port is provided at the top of the grinding frame, the two rotating shafts extend into the grinding frame for rotation, and the two rotating shafts in the grinding frame are also provided with rollers, a slag outlet is provided on the side wall of the grinding frame, a sieve plate 2 is hinged on the inner wall of one side of the grinding frame, one end of the sieve plate 2 extends out of the slag outlet, a vibration motor is provided at the bottom of the end of the sieve plate 2 extending out of the slag outlet, a sliding groove is provided in the grinding frame at the bottom of the slag outlet, a buffer column is provided in the sliding groove, and a buffer spring 2 is provided between the buffer column and the bottom of the sliding groove, the two ends of the buffer spring 2 are respectively connected to the bottom of the buffer column and the bottom of the sliding groove, the top of the buffer column abuts against the bottom of the sieve plate 2, and the bottom of the grinding frame is provided with a discharge port connected to the mixer.

[0017] Preferably, the mixer includes a mixing tank, a support frame is provided at the bottom of the mixing tank, a material inlet communicated with the fly ash discharger and the grinding discharger is provided at the top of the mixing tank, a second motor is provided on one side of the mixing tank, a second rotating shaft is rotatably provided in the mixing tank, a transmission paddle is provided on the second rotating shaft, an output end of the second motor is transmission-connected with the second rotating shaft, a liquid adding pipe is provided on one side of the mixing tank, a discharge pipe is provided on the other side of the mixing tank, a sealing plate is inserted at the connection between the mixing tank and the discharge pipe, a gas rod is provided on one side of the mixing tank, and the protruding end of the gas rod is connected with the sealing plate.

[0018] Preferably, it also includes:

[0019] A vibration frequency detection module is used to measure the vibration frequency of the sieve plate per minute;

[0020] An amplitude measurement module, used for measuring the amplitude of the sieve plate 1;

[0021] Angle measurement module 1, used to measure the angle between the sieve plate 1 and the horizontal plane;

[0022] Angle measurement module 2 is used to measure the angle between the direction in which fly ash particles are released and the normal direction of the sieve plate;

[0023] An alarm module, used for issuing an alarm;

[0024] A calculation module 1, used for calculating the actual vibration intensity of the screen plate 1;

[0025] The calculation module 2 is used to calculate the actual probability value of the fly ash being stuck after falling into the sieve hole based on the vibration intensity of the sieve plate 1;

[0026] A processing module, used for comparing the actual probability value of jamming of fly ash after it falls into the sieve hole with a preset maximum jamming probability value;

[0027] The control module, when the actual probability value of jamming after the fly ash falls into the sieve hole is greater than or equal to the preset maximum jamming probability value, the control alarm module sounds an alarm, cuts off the power supply of the preparation device and waits for maintenance personnel to perform maintenance; when the actual probability value of jamming after the fly ash falls into the sieve hole is less than the preset maximum jamming probability value, the preparation device works normally.

[0028] Preferably, the calculation module 1 calculates based on the following formula 1:

[0029]

[0030] G is the actual vibration intensity of the sieve plate 1, π is the pi, n is the number of vibrations per minute of the sieve plate 1 detected by the vibration frequency detection module, g is the gravity acceleration, and δ is the amplitude of the sieve plate 1 detected by the amplitude measurement module;

[0031] The calculation module 2 is calculated based on the following formula 2:

[0032]

[0033] P is the actual probability value of fly ash getting stuck after falling into the sieve hole, γ1 is the influence coefficient of the mass of fly ash particles on the blockage, γ2 is the influence coefficient of the particle shape of fly ash particles on the blockage, γ3 is the influence coefficient of the hole shape of the sieve hole and the material of the sieve plate 1 on the blockage, d is the particle size of the fly ash particles, D is the size of the sieve hole on the sieve plate 1, θ is the inclination angle of the sieve plate 1, β is the coefficient of the fly ash particles entering the sieve hole after colliding with the inner wall of the sieve hole, ω y is the angle between the direction of fly ash particle movement and the normal direction of the sieve plate, ε is the diameter of the sieve wire on the upper surface of the sieve plate, cos is the cosine, M is the total mass of fly ash added in a single time, and ρ is the density of fly ash particles;

[0034] When P≥P0, the alarm module sounds an alarm, cuts off the power supply of the preparation device and waits for maintenance personnel to perform maintenance;

[0035] When P<P0, the preparation device works normally;

[0036] P0 is the preset maximum jam probability value. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 It is a schematic diagram of a flow chart provided by an embodiment of the present invention;

[0039] Figure 2 It is a schematic diagram of the overall structure provided by an embodiment of the present invention;

[0040] Figure 3 It is a structural schematic diagram of a fly ash discharger provided in an embodiment of the present invention;

[0041] Figure 4 It is a structural schematic diagram of a grinding and discharging machine provided in an embodiment of the present invention;

[0042] Figure 5 It is a schematic diagram of the structure of a mixer provided by an embodiment of the present invention.

[0043] Reference numerals:

[0044] 1. Fly ash discharger; 11. Discharge frame; 111. Feed port; 112. Discharge port; 12. Rotating shaft 1; 13. Bevel gear 1; 14. Roller; 15. Motor 1; 16. Rotating shaft; 161. Ring; 162. Push rod; 17. Bevel gear 2; 18. Baffle frame; 181. Screen plate 1; 182. Slide; 183. Roller head; 184. Heating inclined plate; 185. Air inlet; 186. Hot air blower; 187. Blowing pipe; 188. Slow down 1. Impact spring 1; 2. Grinding and discharging machine; 21. Grinding frame; 22. Filling port; 23. Slag outlet; 24. Screen plate 2; 25. Vibration motor; 26. Sliding groove; 27. Buffer column; 28. Buffer spring 2; 29. ​​Discharge port; 3. Mixer; 31. Mixing tank; 311. Inlet port; 32. Motor 2; 33. Rotating shaft 2; 34. Transmission paddle; 35. Liquid adding pipe; 36. Discharge pipe; 37. Sealing plate; 38. Gas rod; 39. Support frame. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are 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.

[0046] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0047] The present invention provides the following embodiments

[0048] Example 1

[0049] The present invention provides a method for preparing a fly ash-based soft soil solidifying agent, such as Figure 1 As shown, the following steps are included:

[0050] Step 1: Dry the fly ash to remove moisture and impurities;

[0051] Step 2: Grind and stir cement and lime to preheat the polyacrylamide organic polymer material;

[0052] Step 3: Add the pretreated fly ash, cement, lime and organic polymer materials into a mixer according to a certain proportion, and start the mixer to mix and stir;

[0053] Step 4: During the mixing process, gradually add a certain amount of water as an auxiliary agent, the amount of water used is 10%-20% of the total amount of all raw materials;

[0054] In step 1, the drying temperature is controlled at 105°C-115°C, and the drying time is 1h-3h;

[0055] During stirring in step 3, the amount of fly ash added is not less than 20% of the total mass, and the stirring time is controlled within 20-30 minutes.

[0056] The working principle and beneficial effects of the above technical solution are as follows: drying the fly ash at a temperature of 105°C-115°C to remove moisture therein and removing impurities therein by screening, the drying time being 1h-3h, thereby improving the activity of the fly ash; grinding and stirring the cement and lime to ensure stable quality, so as to facilitate the particle refinement of cement and lime particles to react with other substances, and preheating the polyacrylamide organic polymer material to improve the reaction activity and fluidity of the organic polymer material. Polyacrylamide is a polymer adsorbent that can interact with the surface of soil particles to form a polymer network structure, tightly bonding the soil particles together, thereby improving the strength and stability of the soil; adding the pretreated fly ash, cement, lime and organic polymer material into a mixer in a certain proportion, and turning on the mixer for mixing and stirring. , ensure that the various raw materials are mixed evenly, the amount of fly ash added during stirring is not less than 20% of the total mass, and the stirring time is controlled at 20-30 minutes; during the mixing process, a certain amount of water is gradually added as an auxiliary agent, and the amount of water is 10%-20% of the amount of the admixture. The content of SiO2 in fly ash accounts for more than 70%. In addition, it also contains substances such as Al2O3, FeO, Fe2O3, CaO and TiO2. Its chemical properties are similar to those of natural soil, and it is rich in trace elements necessary for plant growth. It has the natural advantage of preparing soil improvement materials, with low cost, large capacity, stable demand, and high particle structure matching. The soft soil solidifier with fly ash as raw material can consume the stock of fly ash, reduce the land occupied by fly ash and the pollution to the environment, and can also reduce the manufacturing cost of the solidifier while improving and repairing the soil and increasing the available land area.

[0057] Example 2

[0058] On the basis of Example 1, Figure 2 As shown, steps 1 to 4 are all performed based on a preparation device, and the preparation device includes a fly ash discharger 1, a grinding discharger 2, and a mixer 3. The fly ash discharger 1 and the grinding discharger 2 are arranged on the top of the mixer 3.

[0059] The working principle and beneficial effects of the above technical solution are as follows: the mixer 3 supports the fly ash feeder 1 and the grinding feeder 2, the fly ash feeder 1 crushes, screens and dries the fly ash and then puts it into the mixer 3, the grinding feeder 2 grinds and stirs the cement and lime and then puts them into the mixer 3, the mixer 3 mixes the incoming fly ash, cement, lime, organic polymer material and water for a certain period of time, and the curing agent is discharged for use after preparation.

[0060] Example 3

[0061] On the basis of Example 2, Figure 3As shown, the fly ash discharger 1 comprises a discharge frame 11, a feed port 111 is arranged at the top of the discharge frame 11, two rotating shafts 12 are arranged horizontally and side by side in the discharge frame 11 below the feed port 111, the two rotating shafts 12 rotate in opposite directions, one end of the two rotating shafts 12 extends out of the discharge frame 11, and bevel gears 13 are respectively arranged on the ends of the two rotating shafts 12 extending out of the discharge frame 11, a roller 14 is arranged on the part of the rotating shaft 12 in the discharge frame 11, a motor 15 is arranged outside the discharge frame 11, a rotating shaft 16 is arranged through a coupling at the output end of the motor 15, a bevel gear 2 17 is arranged on the top of the rotating shaft 16, the two bevel gears 13 are meshed with the bevel gear 2 17 for transmission, and a discharge port 112 connected to the mixer 3 is opened at the bottom of the discharge frame 11;

[0062] A collar 161 is fixedly provided on the rotating shaft 16, and a push rod 162 is provided on the side of the collar 161. A blocking frame 18 is fixedly provided in the material discharging frame 11 below the rolling roller 14, and a sieve plate 181 is horizontally slidably provided on the side wall of the blocking frame 18. The sieve plate 181 and the push rod 162 are on the same horizontal plane, and sliding rods 182 are respectively connected to the two ends of the sieve plate 181. The two sliding rods 182 are inserted into the side walls of the material discharging frame 11 and the blocking frame 18 at the left and right ends, and a roller head 182 is rolled in the sliding rod 182 at the left end. 83, the push rod 162 is in contact with the roller head 183, and the two slide rods 182 are sleeved with a buffer spring 188, and the two ends of the buffer spring 188 are respectively connected to the slide rod 182 and the inner wall of the material blocking frame 18, and a heating inclined plate 184 is arranged in the material blocking frame 18, and a plurality of air inlet holes 185 are opened on the side wall of the material blocking frame 18, and a hot air blower 186 is arranged outside the material discharging frame 11, and a plurality of blowing pipes 187 are arranged on the inner wall of the material discharging frame 11 corresponding to the plurality of air inlet holes 185, and the plurality of blowing pipes 187 are connected to the hot air blower 186.

[0063] The working principle and beneficial effects of the above technical solution are as follows: fly ash is put into the discharge frame 11 from the feed port 111, the motor 15 drives the rotating shaft 16 and the bevel gear 2 17 to rotate, the bevel gear 2 17 drives the two rotating shafts 16 and the rollers 14 thereon to rotate by meshing with the two bevel gears 13, the fly ash entering is crushed by the two rollers 14, and the crushed fly ash falls downward onto the sieve plate 181 in the material blocking frame 18, the rotating shaft 16 drives the sleeve ring 161 and the push rod 162 thereon to rotate synchronously when rotating, and the push rod 162 pushes the roller head 1 on the left end slide 182 at intervals when rotating. 83. The buffer spring 188 acts as an elastic buffer between the slide 182 and the inner wall of the baffle frame 18. The slides 182 and the screen plate 181 at both ends move left and right in the horizontal direction to screen the fly ash falling on the screen plate 181. The fly ash with qualified particles continues to fall downward to the heating inclined plate 184 for heating and drying. The falling fly ash is dried and guided by the hot air blown out from the blowing pipe 187 and the air inlet 185 by the hot air blower 186 in the air. The hot air guides the falling fly ash and the fly ash falling on the inclined plate, and finally blows to the discharge port 112 and falls into the mixer 3 for the next operation.

[0064] Example 4

[0065] On the basis of Example 3, Figure 4 As shown, the grinding and feeding machine 2 includes a grinding frame 21, a filling port 22 is arranged on the top of the grinding frame 21, two rotating shafts 12 extend into the grinding frame 21 and rotate, and the two rotating shafts 12 in the grinding frame 21 are also provided with rollers 14, a slag outlet 23 is opened on the side wall of the grinding frame 21, a sieve plate 24 is hinged on the inner wall of one side of the grinding frame 21, one end of the sieve plate 24 extends out of the slag outlet 23, and the bottom of the end of the sieve plate 24 extending out of the slag outlet 23 is provided with A vibration motor 25, a sliding groove 26 is provided in the grinding frame 21 at the bottom of the slag outlet 23, a buffer column 27 is provided in the sliding groove 26, a buffer spring 28 is provided between the buffer column 27 and the bottom of the sliding groove 26, the two ends of the buffer spring 28 are respectively connected to the bottom of the buffer column 27 and the bottom of the sliding groove 26, the top of the buffer column 27 is abutted against the bottom of the sieve plate 24, and a discharge port 29 connected to the mixer 3 is provided at the bottom of the grinding frame 21.

[0066] The working principle and beneficial effects of the above technical solution are as follows: cement and lime are put into the grinding frame 21 from the filling port 22, and the cement and lime are crushed by the rollers 14 in the grinding frame 21 and continue to fall downward, and the cement and lime powder falling downward falls on the sieve plate 24, and the sieve plate 24 keeps vibrating under the action of the vibration motor 25 to screen the cement and lime powder thereon, and the cement and lime powder with qualified particles passes through the sieve plate 24 and falls downward to the discharge port 29 and falls into the mixer 3 for the next operation, and the unqualified cement and lime powder is discharged from the slag outlet 23 along the inclined surface of the sieve plate 24 to the outside of the grinding frame 21, and when the sieve plate 24 vibrates, it drives the buffer column 27 to vibrate up and down in the sliding groove 26 under the action of the buffer spring 28, and the buffer column 27 vibrating up and down buffers the vibration of the sieve plate 24 to prevent the sieve plate 24 from hard collision with the grinding frame 21 and causing damage when vibrating.

[0067] Example 5

[0068] On the basis of Example 4, Figure 5 As shown, the mixer 3 includes a mixing tank 31, a support frame 39 is provided at the bottom of the mixing tank 31, a material inlet 311 communicating with the fly ash discharger 1 and the grinding discharger 2 is provided at the top of the mixing tank 31, a motor 2 32 is provided on one side of the mixing tank 31, a rotating shaft 2 33 is rotatably provided in the mixing tank 31, a transmission paddle 34 is provided on the rotating shaft 2 33, an output end of the motor 2 32 is transmission-connected with the rotating shaft 2 33, a liquid adding pipe 35 is provided on one side of the mixing tank 31, a discharge pipe 36 is provided on the other side of the mixing tank 31, a sealing plate 37 is inserted at the connection between the mixing tank 31 and the discharge pipe 36, a gas rod 38 is provided on one side of the mixing tank 31, and the protruding end of the gas rod 38 is connected to the sealing plate 37.

[0069] The working principle and beneficial effects of the above technical solution are as follows: the screened and dried fly ash, ground and screened cement and lime fall into the mixing tank 31 from the material inlet 311, and then a predetermined amount of polyacrylamide organic polymer material is first added from the liquid adding pipe 35 and then a predetermined amount of water is added as an auxiliary agent. The motor 2 32 drives the rotating shaft 2 33 to rotate, and the rotating shaft 2 33 drives the transmission paddle 34 to rotate. After the transmission paddle 34 stirs the raw materials in the mixing tank 31 for a certain amount of time, the telescopic end of the gas rod 38 is controlled to retract, and the telescopic end of the gas rod 38 drives the sealing plate 37 to open the connection between the mixing tank 31 and the discharge pipe 36, and the prepared curing agent is discharged from the discharge pipe 36 to the outside of the mixing tank 31 for collection.

[0070] Example 6

[0071] On the basis of Example 5, the present invention further comprises:

[0072] The vibration frequency detection module is used to measure the vibration frequency of the sieve plate 181 per minute;

[0073] Amplitude measurement module, used to measure the amplitude of the sieve plate 181;

[0074] Angle measurement module 1, used to measure the angle between the sieve plate 181 and the horizontal plane;

[0075] Angle measurement module 2, used to measure the angle between the direction in which fly ash particles are released and the normal direction of the sieve plate 181;

[0076] An alarm module, used for issuing an alarm;

[0077] A calculation module 1, used for calculating the actual vibration intensity of the screen plate 181;

[0078] Calculation module 2, for calculating the actual probability value of fly ash getting stuck after falling into the sieve hole based on the actual vibration intensity of the sieve plate 181;

[0079] A processing module, used for comparing the actual probability value of jamming of fly ash after it falls into the sieve hole with a preset maximum jamming probability value;

[0080] The control module, when the actual probability value of jamming after the fly ash falls into the sieve hole is greater than or equal to the preset maximum jamming probability value, the control alarm module sounds an alarm, cuts off the power supply of the preparation device and waits for maintenance personnel to perform maintenance; when the actual probability value of jamming after the fly ash falls into the sieve hole is less than the preset maximum jamming probability value, the preparation device works normally.

[0081] The working principle and beneficial effects of the above technical solution are as follows: the vibration frequency detection module measures the number of vibrations of the sieve plate 181 per minute, the amplitude measurement module measures the amplitude of the sieve plate 181, the angle measurement module 1 is used to measure the angle between the sieve plate 181 and the horizontal plane, the angle measurement module 2 measures the angle between the direction in which the fly ash particles are released and the normal direction of the sieve plate 181, the alarm module is used to issue an alarm, the calculation module 1 calculates the actual vibration intensity of the sieve plate 1, the calculation module 2 calculates the actual probability value of the fly ash being stuck after falling into the sieve hole based on the actual vibration intensity of the sieve plate 181, the processing module compares the actual probability value of the fly ash being stuck after falling into the sieve hole with the preset maximum sticking probability value, and the control module controls the alarm module to issue an alarm when the actual probability value of the fly ash being stuck after falling into the sieve hole is greater than or equal to the preset maximum sticking probability value, and cuts off the power supply of the preparation device to wait for maintenance personnel to perform maintenance; when the actual probability value of the fly ash being stuck after falling into the sieve hole is less than the preset maximum sticking probability value, the preparation device works normally.

[0082] Example 7

[0083] Based on Example 6, the calculation module 1 calculates based on the following formula 1:

[0084]

[0085] G is the actual vibration intensity of the sieve plate 181, π is the pi, n is the number of vibrations per minute of the sieve plate 181 detected by the vibration frequency detection module, g is the gravity acceleration, and δ is the amplitude of the sieve plate 181 detected by the amplitude measurement module;

[0086] The calculation module 2 is calculated based on the following formula 2:

[0087]

[0088] P is the actual probability value of fly ash getting stuck after falling into the sieve hole, γ1 is the influence coefficient of the mass of fly ash particles on the blockage, γ2 is the influence coefficient of the particle shape of fly ash particles on the blockage, γ3 is the influence coefficient of the hole shape of the sieve hole and the material of the sieve plate on the blockage, d is the particle size of the fly ash particles, D is the size of the sieve hole on the sieve plate 181, θ is the inclination angle of the sieve plate 181, β is the coefficient of the fly ash particles entering the sieve hole after colliding with the inner wall of the sieve hole, ω y is the angle between the direction of fly ash particle movement and the normal direction of the sieve plate 181, ε is the diameter of the sieve wire on the upper surface of the sieve plate 1, cos is the cosine, M is the total mass of fly ash added in a single time, and ρ is the density of fly ash particles;

[0089] When P≥P0, the alarm module sounds an alarm, cuts off the power supply of the preparation device and waits for maintenance personnel to perform maintenance;

[0090] When P<P0, the preparation device works normally;

[0091] P0 is the preset maximum jam probability value.

[0092] The working principle and beneficial effects of the above technical solution are: Calculate the actual vibration intensity of the screen plate 181 by The probability of fly ash particles successfully falling into the The actual probability value of fly ash getting stuck after falling into the sieve hole is calculated, γ1, γ2, and γ3 are all constants less than 1. When the actual probability value of fly ash getting stuck after falling into the sieve hole is greater than or equal to the preset maximum probability value of sticking, the control alarm module will sound an alarm, cut off the power supply of the preparation device and wait for maintenance personnel to perform maintenance; when the actual probability value of fly ash getting stuck after falling into the sieve hole is less than the preset maximum probability value of sticking, the preparation device works normally.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for preparing a fly ash-based soft soil solidifying agent, characterized in that: The following steps are involved: Step 1: pre-treating the fly ash, including drying and impurity removal; Step 2: Grind and stir cement and lime to preheat the polyacrylamide organic polymer material; Step 3: Add the pretreated fly ash, cement, lime and organic polymer materials treated in step 2 into a mixer according to a certain proportion, and start the mixer to mix and stir; Step 4: During the mixing process, gradually add a certain amount of water as an auxiliary agent, and the amount of water used is 10%-20% of the total amount of all raw materials.

2. The method for preparing a fly ash-based soft soil solidifying agent according to claim 1, characterized in that: In step 1, the drying temperature is controlled at 105°C-115°C, and the drying time is 1h-3h.

3. The method for preparing a fly ash-based soft soil solidifying agent according to claim 2, characterized in that: During stirring in step 3, the amount of fly ash added is not less than 20% of the total mass, and the stirring time is controlled within 20-30 minutes.

4. The method for preparing a fly ash-based soft soil solidifying agent according to claim 1, characterized in that: The steps 1 to 4 are all performed based on a preparation device, wherein the preparation device comprises a fly ash discharger (1), a grinding discharger (2), and a mixer (3), wherein the fly ash discharger (1) and the grinding discharger (2) are arranged on top of the mixer (3).

5. The method for preparing a fly ash-based soft soil solidifying agent according to claim 4, characterized in that: The fly ash discharger (1) comprises a discharge frame (11), a feed port (111) is arranged at the top of the discharge frame (11), two rotating shafts (12) are arranged horizontally and side by side in the discharge frame (11) below the feed port (111), the two rotating shafts (12) rotate in opposite directions, one end of the two rotating shafts (12) protrudes out of the discharge frame (11), and a bevel gear (13) is respectively arranged on the ends of the two rotating shafts (12) protruding out of the discharge frame (11). A roller (14) is arranged on the part of the rotating shaft (12) inside the discharge frame (11), a motor (15) is arranged outside the discharge frame (11), an output end of the motor (15) is provided with a rotating shaft (16) via a coupling, a bevel gear (17) is arranged on the top of the rotating shaft (16), the two bevel gears (13) are meshed with the bevel gear (17) for transmission, and a discharge port (112) connected to the mixer (3) is opened at the bottom of the discharge frame (11).

6. The method for preparing a fly ash-based soft soil solidifying agent according to claim 5, characterized in that: A collar (161) is fixedly provided on the rotating shaft (16), a push rod (162) is provided on the side of the collar (161), a material blocking frame (18) is fixedly provided in the material discharging frame (11) below the rolling roller (14), a sieve plate (181) is horizontally slidably provided on the side wall of the material blocking frame (18), the sieve plate (181) and the push rod (162) are on the same horizontal plane, two ends of the sieve plate (181) are respectively connected with sliding rods (182), the two sliding rods (182) are inserted into the side walls of the material discharging frame (11) and the material blocking frame (18) at the left and right ends, and a roller head (182) is rollingly provided in the sliding rod (182) at the left end. 3), the push rod (162) is in contact with the roller head (183), and a buffer spring (188) is sleeved on the two slide rods (182), and the two ends of the buffer spring (188) are respectively connected to the slide rod (182) and the inner wall of the material blocking frame (18), and a heating inclined plate (184) is arranged in the material blocking frame (18), and a plurality of air inlet holes (185) are opened on the side wall of the material blocking frame (18), and a hot air blower (186) is arranged outside the material discharging frame (11), and a plurality of blowing pipes (187) are arranged on the inner wall of the material discharging frame (11) corresponding to the plurality of air inlet holes (185), and the plurality of blowing pipes (187) are connected to the hot air blower (186).

7. The method for preparing a fly ash-based soft soil solidifying agent according to claim 5, characterized in that: The grinding and discharging machine (2) comprises a grinding frame (21), a filling port (22) is arranged at the top of the grinding frame (21), two rotating shafts (12) extend into the grinding frame (21) for rotation, the two rotating shafts (12) in the grinding frame (21) are also provided with rollers (14), a slag outlet (23) is provided on the side wall of the grinding frame (21), a sieve plate (24) is hingedly connected to the inner wall of one side of the grinding frame (21), one end of the sieve plate (24) extends out of the slag outlet (23), and a vibration device is arranged at the bottom of the end of the sieve plate (24) extending out of the slag outlet (23). A motor (25) is provided, a sliding groove (26) is provided in the grinding frame (21) at the bottom of the slag outlet (23), a buffer column (27) is provided in the sliding groove (26), a buffer spring (28) is provided between the buffer column (27) and the bottom of the sliding groove (26), the two ends of the buffer spring (28) are respectively connected to the bottom of the buffer column (27) and the bottom of the sliding groove (26), the top of the buffer column (27) is in contact with the bottom of the sieve plate (24), and a discharge port (29) connected to the mixer (3) is provided at the bottom of the grinding frame (21).

8. The method for preparing a fly ash-based soft soil solidifying agent according to claim 7, characterized in that: The mixer (3) comprises a mixing tank (31), a support frame (39) is arranged at the bottom of the mixing tank (31), a material inlet (311) communicating with the fly ash discharger (1) and the grinding discharger (2) is arranged at the top of the mixing tank (31), a second motor (32) is arranged on one side of the mixing tank (31), a second rotating shaft (33) is rotatably arranged in the mixing tank (31), and a transmission blade (34) is arranged on the second rotating shaft (33). ), the output end of the second motor (32) is transmission-connected to the second rotating shaft (33), a liquid adding pipe (35) is provided on one side of the mixing tank (31), a discharge pipe (36) is provided on the other side of the mixing tank (31), a sealing plate (37) is inserted at the connection between the mixing tank (31) and the discharge pipe (36), a gas rod (38) is provided on one side of the mixing tank (31), and the protruding end of the gas rod (38) is connected to the sealing plate (37).

9. The method for preparing a fly ash-based soft soil solidifying agent according to claim 6, characterized in that: Also includes: A vibration frequency detection module, used to measure the vibration frequency of the sieve plate (181) per minute; An amplitude measurement module, used for measuring the amplitude of the sieve plate 1 (181); Angle measurement module 1, used for measuring the angle between the sieve plate 1 (181) and the horizontal plane; Angle measurement module 2, used to measure the angle between the direction in which fly ash particles are released and the normal direction of the sieve plate 1 (181); An alarm module, used for issuing an alarm; A calculation module 1, used for calculating the actual vibration intensity of the sieve plate 1 (181); A calculation module 2 is used to calculate the actual probability value of the fly ash being stuck after falling into the sieve hole based on the actual vibration intensity of the sieve plate 1 (181); A processing module, used for comparing the actual probability value of jamming of fly ash after it falls into the sieve hole with a preset maximum jamming probability value; The control module, when the actual probability value of jamming after the fly ash falls into the sieve hole is greater than or equal to the preset maximum jamming probability value, the control alarm module sounds an alarm, cuts off the power supply of the preparation device and waits for maintenance personnel to perform maintenance; when the actual probability value of jamming after the fly ash falls into the sieve hole is less than the preset maximum jamming probability value, the preparation device works normally.

10. The method for preparing a fly ash-based soft soil solidifying agent according to claim 9, characterized in that: The calculation module 1 calculates based on the following formula 1: G is the actual vibration intensity of the sieve plate 1 (181), π is the pi, n is the number of vibrations per minute of the sieve plate 1 (181) detected by the vibration frequency detection module, g is the gravity acceleration, and δ is the amplitude of the sieve plate 1 (181) detected by the amplitude measurement module; The calculation module 2 is calculated based on the following formula 2: P is the actual probability value of fly ash getting stuck after falling into the sieve hole, γ1 is the influence coefficient of fly ash particle mass on the clogging, γ2 is the influence coefficient of fly ash particle shape on the clogging, γ3 is the influence coefficient of the sieve hole shape and the material of the sieve plate (181) on the clogging, d is the particle size of fly ash particles, D is the size of the sieve hole on the sieve plate (181), θ is the inclination angle of the sieve plate (181), β is the coefficient of fly ash particles entering the sieve hole after colliding with the inner wall of the sieve hole, ω y is the angle between the direction of fly ash particle movement and the normal direction of the sieve plate (181), ε is the diameter of the sieve wire on the upper surface of the sieve plate, cos is the cosine, M is the total mass of fly ash added in a single time, and ρ is the density of fly ash particles.

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