CN111467997A - Batch preparation device and method for bentonite with specific water content - Google Patents
Batch preparation device and method for bentonite with specific water content Download PDFInfo
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- CN111467997A CN111467997A CN202010434673.3A CN202010434673A CN111467997A CN 111467997 A CN111467997 A CN 111467997A CN 202010434673 A CN202010434673 A CN 202010434673A CN 111467997 A CN111467997 A CN 111467997A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
- B01F27/70—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/50—Mixing liquids with solids
- B01F23/51—Methods thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/50—Mixing liquids with solids
- B01F23/54—Mixing liquids with solids wetting solids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/50—Mixing liquids with solids
- B01F23/565—Mixing liquids with solids by introducing liquids in solid material, e.g. to obtain slurries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/21—Measuring
- B01F35/2135—Humidity, e.g. moisture content
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/22—Control or regulation
- B01F35/221—Control or regulation of operational parameters, e.g. level of material in the mixer, temperature or pressure
- B01F35/2213—Pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/71—Feed mechanisms
- B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
- B01F35/71745—Feed mechanisms characterised by the means for feeding the components to the mixer using pneumatic pressure, overpressure, gas or air pressure in a closed receptacle or circuit system
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/71—Feed mechanisms
- B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
- B01F35/7179—Feed mechanisms characterised by the means for feeding the components to the mixer using sprayers, nozzles or jets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/80—Forming a predetermined ratio of the substances to be mixed
- B01F35/88—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise
- B01F35/881—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise by weighing, e.g. with automatic discharge
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
- B01F2101/28—Mixing cement, mortar, clay, plaster or concrete ingredients
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The invention discloses a device and a method for preparing bentonite with specific water content in batches, wherein the device comprises a stirring system, a feeding system, a water supply system and a collecting system. The stirring system comprises a stirring bin, a motor and a stirring paddle, the stirring paddle is located in the stirring bin and is rotationally connected with the stirring bin, the motor is located outside the stirring bin and is in transmission connection with the stirring paddle, and the stirring paddle is an adjustable stirring paddle. The feeding system is communicated with the stirring bin and is used for conveying bentonite powder to the stirring bin. The water supply system is used for conveying spray water to the stirring bin. The collecting system is positioned below the stirring bin and communicated with the stirring bin for collecting the bentonite with the specific water content after stirring. The method can solve the problems of large water content preparation difference, non-uniform water content and the like in the prior art, thereby realizing the preparation of the bentonite with specific water content in a large batch, a plurality of batches, high efficiency and convenience.
Description
Technical Field
The invention relates to the technical field of buffer backfill material building block preparation, in particular to a device and a method for preparing bentonite with specific water content in batches.
Background
The buffer backfill material is used as an important component of a multiple barrier system in a high-level waste geological disposal warehouse, and a large number of researches show that bentonite is a base material of a proper buffer backfill material. Internationally, the bentonite blocks are wrapped around the waste tank in a stacking mode and serve as a last artificial barrier between the waste tank and the geological body, the bentonite blocks play important roles in engineering barriers, hydraulic barriers, chemical barriers, conduction and dissipation of decay heat of radioactive wastes and the like, and the bentonite blocks are effective guarantee for the safety and stability of the geological disposal reservoir.
In the preparation process of the high-compaction bentonite block, the moisture content of the bentonite raw material has important influence on the press formability and the integrity of the block, so that the control of the preparation method of the bentonite with specific moisture content becomes a crucial part. Meanwhile, in order to safely dispose of high-level wastes, large-sized blocks adopted in underground laboratories and disposal warehouses are of a meter-scale size, which means that the weight of a single bentonite block is more than 1 ton, and therefore, considering the block preparation efficiency, a large amount of bentonite raw materials with specific water content need to be prepared in a short time. However, the presently disclosed formulation methods are largely divided into two categories: one method is to prepare the water-based paint according to the standard GB/T50123-2019 of the geotechnical test method, but the method is to manually prepare the water-based paint in an experiment, so that the preparation efficiency is low, and the difference of target water content is large. The other is mechanical preparation, but the method also aims at stirring and mixing non-expansive soil samples, and cannot meet the requirement of single-time mixing tonnage soil samples, and because the bentonite is expansive clay containing montmorillonite and has special performance of swelling when meeting water, the method is not suitable. Meanwhile, because the bentonite has extremely strong plasticity, the bentonite and the liquid water are directly mixed, and the liquid water and the bentonite are difficult to be uniformly mixed in the process of preparing the material with certain water content, the bentonite is agglomerated, adhered to a mixing container and the like, so that the water distribution is not uniform, and the method cannot be used as a batch preparation method of the bentonite with specific water content.
Disclosure of Invention
The invention aims to provide a device and a method for preparing bentonite with specific water content in batches, which are used for solving the problems of large water content preparation difference, non-uniform water content and the like in the prior art, so that the bentonite with specific water content can be prepared in batches, in multiple batches, efficiently and conveniently.
In order to achieve the purpose, the invention provides the following scheme:
the invention discloses a batch preparation device for bentonite with specific water content, which comprises:
the stirring system comprises a stirring bin, a motor and a stirring paddle, the stirring paddle is positioned in the stirring bin and is in rotating connection with the stirring bin, the motor is positioned outside the stirring bin and is in transmission connection with the stirring paddle, and the stirring paddle is an adjustable stirring paddle;
the feeding system is communicated with the stirring bin and is used for conveying bentonite powder to the stirring bin;
the water supply system is used for conveying spray water to the stirring bin;
and the collecting system is positioned below the stirring bin and communicated with the stirring bin for collecting the bentonite with specific water content after stirring.
Preferably, the feeding system comprises a raw material bin and a pneumatic conveying device, the raw material bin is communicated with the stirring bin through the pneumatic conveying device, and the pneumatic conveying device is used for conveying the bentonite powder in the raw material bin to the stirring bin.
Preferably, the water supply system comprises an atomizing nozzle, a water delivery pipe, a pressure water pump and a water storage tank, the water storage tank is communicated with a water inlet of the pressure water pump through the water delivery pipe, a water outlet of the pressure water pump is communicated with the atomizing nozzle through the water delivery pipe, and the atomizing nozzle is fixed at the top of the inner side of the stirring bin.
Preferably, the collecting system comprises a discharge valve, a storage barrel and a discharge port, the discharge valve is installed on the discharge port, and the upper end and the lower end of the discharge port are respectively communicated with the stirring bin and the storage barrel.
Preferably, the pneumatic control system further comprises a control system, the control system comprises a control button and a controller, the control button is electrically connected with the input end of the controller, the control button comprises a material conveying switch, a stirrer switch and a water pump switch, the output end of the controller is electrically connected with the pneumatic conveying device, the motor and the input end of the pressure water pump respectively, and the material conveying switch, the stirrer switch and the water pump switch respectively control the action of the pneumatic conveying device, the motor and the pressure water pump.
Preferably, the inner wall of the stirring bin is made of polytetrafluoroethylene.
Preferably, the stirring device further comprises a bracket, and the stirring bin is positioned on the bracket.
Preferably, the upper part of the stirring bin is rectangular, and the lower part of the stirring bin is semicircular.
Preferably, the number of the atomizing spray heads is 3-6, the atomizing spray heads are located right above the stirring paddle and distributed along the axial direction of the stirring paddle, and the maximum atomizing spray diameter of the atomizing spray heads is smaller than the inner diameter of the stirring bin.
The invention also discloses a batch preparation method of the bentonite with the specific water content, which uses the batch preparation device of the bentonite with the specific water content and comprises the following steps:
s1, selecting bentonite powder, and testing the natural water content according to the standard of the soil engineering test method;
s2, weighing bentonite powder, and calculating the pre-added water amount according to the mass of the bentonite, the natural water content and the pre-prepared target water content;
s3, putting the weighed bentonite powder into a raw material bin, and putting the pre-added water into a water storage tank;
s4, starting a material conveying switch to convey bentonite into the stirring bin, and closing the material conveying switch after all bentonite in the raw material bin is conveyed into the stirring bin;
s5, adjusting the adjustable stirring paddle to be spaced to 0.5cm from the inner wall of the stirring bin, adjusting the pressure of a pressure water pump to 0.8MPa, and adjusting an atomizing nozzle to atomize water into fine particles of 1-5 microns;
s6, turning on a stirrer switch, starting stirring of the bentonite powder with natural water content by a stirring paddle under the driving of a motor, starting a water pump switch after the stirring bin operates stably for 10-15 seconds, and uniformly spraying liquid on the bentonite powder by an atomizing nozzle;
s7, after the liquid in the water storage tank is half output, adjusting the adjustable stirring paddle to be spaced from the inner wall of the stirring bin by 1 cm; after all the liquid in the water storage tank is output, the adjustable stirring paddle is adjusted to be spaced from the inner wall of the stirring bin to 1.5 cm; after the pressure of the pressurized water pump is displayed as 0, continuing stirring for 10-15 seconds, and then turning off a stirrer switch and a water pump switch;
s8, opening a discharge valve, starting a stirrer switch to connect the prepared bentonite into a storage barrel through a discharge port, numbering and sealing for later use;
s9, taking a part of samples in the storage barrel to test the water content, comparing the target water content, and adjusting the water adding amount in real time.
Compared with the prior art, the invention has the following technical effects:
1. according to the invention, aiming at the characteristic of water absorption and expansion of bentonite, the stirring paddle is set to be adjustable, the distance between the stirring paddle and the inner wall of the stirring bin can be adjusted in time according to the water content, the phenomena of inner wall adhesion, agglomeration and hardening and agglomeration are prevented, and the uniformity of water content preparation is ensured;
2. the invention can realize ton-level batch mixing of bentonite in a short time, saves time and labor, and is efficient and convenient;
3. the invention can realize full sealing in the stirring and conveying process, has no dust flying in the whole stirring process, and effectively ensures the health of operators.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a batch preparation device for bentonite with a specific water content according to this embodiment;
description of reference numerals: 1-raw material bin; 2-a conveying pipe; 3-material conveying switch; 4-stirrer switch; 5-water pump switch; 6, a motor; 7-a stirring bin; 8-an atomizing spray head; 9-stirring paddle; 10-water conveying pipe; 11-a discharge valve; 12-a storage barrel; 13-a discharge hole; 14-a scaffold; 15-a pressurized water pump; 16-water storage tank.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a device and a method for preparing bentonite with specific water content in batches, which are used for solving the problems of large water content preparation difference, non-uniform water content and the like in the prior art, so that the bentonite with specific water content can be prepared in batches, in multiple batches, efficiently and conveniently.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1, the present embodiment provides a device for preparing bentonite with a specific water content in batch, which includes a stirring system, a feeding system, a water supply system and a collecting system.
Wherein, the mixing system includes stirring storehouse 7, motor 6 and stirring rake 9, and stirring rake 9 is located stirring storehouse 7 and rotates with stirring storehouse 7 to be connected, and motor 6 is located stirring storehouse 7 outside and is connected with the 9 transmissions of stirring rake, and stirring rake 9 is adjustable stirring rake. The specific structure of adjustable stirring rake is prior art, so need not be repeated here. The feeding system is communicated with the stirring bin 7 and conveys bentonite powder to the stirring bin 7. The water supply system is used for conveying spray water to the stirring bin 7. The collecting system is positioned below the stirring bin 7 and communicated with the stirring bin 7 for collecting the bentonite with specific water content after stirring.
When the bentonite mixer is used, the stirring system, the feeding system, the water supply system and the collecting system are matched with one another, tonnage-level batch mixing of bentonite can be realized in a short time, and the bentonite mixer is time-saving, labor-saving, efficient and convenient; the whole stirring process is fully sealed, so that no dust flies during the whole stirring process, and the health of operators is effectively ensured; because the stirring rake 9 is adjustable, can in time adjust the distance of stirring rake 9 and 7 inner walls in stirring storehouse according to the moisture content size, prevent adhesion inner wall, caking hardening and reunion phenomenon, guarantee the homogeneity that the moisture content was prepared.
Specifically, in this embodiment, feeding system includes former feed bin 1 and pneumatic conveyor, and former feed bin 1 passes through pneumatic conveyor and stirs 7 intercommunications in the storehouse, and pneumatic conveyor is used for carrying the bentonite powder in 1 former feed bin to stirring 7 storehouses, and the transportation process is convenient quick. The pneumatic conveying device comprises a conveying pipe 2, and for the sake of simplicity, only the conveying pipe 2 is shown in fig. 1.
In this embodiment, the water supply system includes atomizer 8, raceway 10, pressure water pump 15 and water storage tank 16, and water storage tank 16 is linked together through a raceway 10 and pressure water pump 15's water inlet, and pressure water pump 15's delivery port is linked together through a raceway 10 and atomizer 8, and atomizer 8 is fixed in the inboard top in stirring storehouse 7. The water in the water outlet pipe is conveyed into the stirring bin 7 through a pressurized water pump 15, and is uniformly atomized and sprayed by the atomizing nozzle 8.
In this embodiment, the number of the atomizing nozzles 8 is preferably 3 to 6, the atomizing nozzles 8 are located right above the stirring paddle 9 and are distributed along the axial direction of the stirring paddle 9, and the maximum atomizing spray diameter of the atomizing nozzles 8 is smaller than the inner diameter of the stirring bin 7. The maximum atomization spraying diameter can be adjusted, so that the maximum atomization spraying diameter is smaller than the inner diameter of the stirring bin 7, and the spraying on the inner wall is prevented, thereby reducing the corrosion.
In order to improve the corrosion resistance of the apparatus, the paddle 9 of the present embodiment is made of stainless steel. In order to effectively reduce the adhesion phenomenon of bentonite and simultaneously reduce the corrosion of bentonite, the inner wall of the stirring bin 7 of the embodiment is formed by lining polytetrafluoroethylene.
In this embodiment, the collection system includes discharge valve 11, storage vat 12 and discharge gate 13, and discharge valve 11 installs on discharge gate 13, and the upper and lower both ends of discharge gate 13 are linked together with stirring storehouse 7 and storage vat 12 respectively. In this embodiment, the discharge port 13 is preferably V-shaped. After the stirring is finished, the discharge valve 11 is opened, and the automatic discharging can be carried out under the action of gravity.
In order to reduce the occupied space and improve the space utilization rate, the present embodiment further includes a support 14, the stirring bin 7 is located on the support 14, and the storage barrel 12 is located below the support 14.
In order to facilitate stirring and spraying and facilitate the material to enter the storage barrel 12, the upper part of the stirring bin 7 is rectangular, and the lower part is semicircular.
In order to facilitate control of the stirring process, the present embodiment further comprises a control system. The control system comprises a control button and a controller, the control button is electrically connected with the input end of the controller, the control button comprises a material conveying switch 3, a stirrer switch 4 and a water pump switch 5, the output end of the controller is respectively electrically connected with the input ends of the pneumatic conveying device, the motor 6 and the pressure water pump 15, and the material conveying switch 3, the stirrer switch 4 and the water pump switch 5 respectively control the actions of the pneumatic conveying device, the motor 6 and the pressure water pump 15. In this embodiment, the control system is located on the support 14 and is disposed adjacent to the blending bin 7.
The embodiment further provides a batch preparation method of bentonite with a specific water content, which uses the batch preparation device of bentonite with a specific water content and comprises the following steps:
s1, selecting bentonite powder, and testing the natural water content according to the standard of the soil engineering test method;
s2, weighing bentonite powder, and calculating the pre-added water amount according to the mass of the bentonite, the natural water content and the pre-prepared target water content;
s3, putting the weighed bentonite powder into the raw material bin 1, and putting the pre-added water into the water storage tank 16;
s4, starting the material conveying switch 3 to convey the bentonite into the stirring bin 7, and closing the material conveying switch 3 after all the bentonite in the raw material bin 1 is conveyed into the stirring bin 7;
s5, adjusting the adjustable stirring paddle to be spaced to 0.5cm from the inner wall of the stirring bin 7, adjusting the pressure of a pressurized water pump 15 to 0.8MPa, and adjusting an atomizing nozzle 8 to atomize into fine particles of 1-5 microns;
s6, turning on a stirrer switch 4, starting stirring of bentonite powder with natural water content by a stirring paddle 9 under the drive of a motor 6, starting a water pump switch 5 after stable operation of a stirring bin 7 for 10-15 seconds, and uniformly spraying liquid on the bentonite powder by an atomizing nozzle 8;
s7, after the liquid in the water storage tank 16 is half output, adjusting the adjustable stirring paddle to be spaced to 1cm from the inner wall of the stirring bin 7; after all the liquid in the water storage tank 16 is output, the adjustable stirring paddle is adjusted to be spaced from the inner wall of the stirring bin 7 by 1.5 cm; after the pressure of the pressurizing water pump 15 is displayed as 0, continuing stirring for 10-15 seconds, and then closing the stirrer switch 4 and the water pump switch 5;
s8, opening the discharge valve 11, starting the stirrer switch 4 to connect the prepared bentonite into the storage barrel 12 through the discharge port 13, numbering and sealing for later use;
s9, taking a part of samples in the storage barrel 12 to test the water content, comparing the target water content, and adjusting the water adding amount in real time.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. The utility model provides a device is prepared in batches to specific moisture content bentonite which characterized in that includes:
the stirring system comprises a stirring bin, a motor and a stirring paddle, the stirring paddle is positioned in the stirring bin and is in rotating connection with the stirring bin, the motor is positioned outside the stirring bin and is in transmission connection with the stirring paddle, and the stirring paddle is an adjustable stirring paddle;
the feeding system is communicated with the stirring bin and is used for conveying bentonite powder to the stirring bin;
the water supply system is used for conveying spray water to the stirring bin;
and the collecting system is positioned below the stirring bin and communicated with the stirring bin for collecting the bentonite with specific water content after stirring.
2. The batch preparation device for bentonite with specific water content according to claim 1, wherein the feeding system comprises a raw material bin and a pneumatic conveying device, the raw material bin is communicated with the stirring bin through the pneumatic conveying device, and the pneumatic conveying device is used for conveying bentonite powder in the raw material bin to the stirring bin.
3. The batch preparation device for the bentonite with the specific water content as claimed in claim 2, wherein the water supply system comprises an atomizing nozzle, a water pipe, a pressurized water pump and a water storage tank, the water storage tank is communicated with a water inlet of the pressurized water pump through the water pipe, a water outlet of the pressurized water pump is communicated with the atomizing nozzle through the water pipe, and the atomizing nozzle is fixed at the top of the inner side of the stirring bin.
4. The batch preparation device for bentonite with specific water content according to claim 3, wherein the collection system comprises a discharge valve, a storage barrel and a discharge port, the discharge valve is mounted on the discharge port, and the upper end and the lower end of the discharge port are respectively communicated with the stirring bin and the storage barrel.
5. The batch preparation device for bentonite with specific water content according to claim 4, further comprising a control system, wherein the control system comprises a control button and a controller, the control button is electrically connected with an input end of the controller, the control button comprises a material conveying switch, a stirrer switch and a water pump switch, an output end of the controller is electrically connected with input ends of the pneumatic conveying device, the motor and the pressurized water pump respectively, and the material conveying switch, the stirrer switch and the water pump switch control actions of the pneumatic conveying device, the motor and the pressurized water pump respectively.
6. The device for preparing the bentonite with the specific water content in batches according to claim 1, wherein the inner wall of the stirring bin is made of polytetrafluoroethylene.
7. The batch preparation device for bentonite with specific water content according to claim 1, further comprising a bracket, wherein the stirring bin is positioned on the bracket.
8. The batch preparation device of bentonite with specific water content according to claim 1, wherein the upper part of the stirring bin is rectangular and the lower part is semicircular.
9. The batch preparation device for the bentonite with the specific water content according to claim 3, wherein the number of the atomizing nozzles is 3-6, the atomizing nozzles are positioned right above the stirring paddle and distributed along the axial direction of the stirring paddle, and the maximum atomizing spray diameter of the atomizing nozzles is smaller than the inner diameter of the stirring bin.
10. A batch preparation method of bentonite with a specific water content, which uses the batch preparation device of the bentonite with the specific water content according to any one of claims 1 to 9, and comprises the following steps:
s1, selecting bentonite powder, and testing the natural water content according to the standard of the soil engineering test method;
s2, weighing bentonite powder, and calculating the pre-added water amount according to the mass of the bentonite, the natural water content and the pre-prepared target water content;
s3, putting the weighed bentonite powder into a raw material bin, and putting the pre-added water into a water storage tank;
s4, starting a material conveying switch to convey bentonite into the stirring bin, and closing the material conveying switch after all bentonite in the raw material bin is conveyed into the stirring bin;
s5, adjusting the adjustable stirring paddle to be spaced to 0.5cm from the inner wall of the stirring bin, adjusting the pressure of a pressure water pump to 0.8MPa, and adjusting an atomizing nozzle to atomize water into fine particles of 1-5 microns;
s6, turning on a stirrer switch, starting stirring of the bentonite powder with natural water content by a stirring paddle under the driving of a motor, starting a water pump switch after the stirring bin operates stably for 10-15 seconds, and uniformly spraying liquid on the bentonite powder by an atomizing nozzle;
s7, after the liquid in the water storage tank is half output, adjusting the adjustable stirring paddle to be spaced from the inner wall of the stirring bin by 1 cm; after all the liquid in the water storage tank is output, the adjustable stirring paddle is adjusted to be spaced from the inner wall of the stirring bin to 1.5 cm; after the pressure of the pressurized water pump is displayed as 0, continuing stirring for 10-15 seconds, and then turning off a stirrer switch and a water pump switch;
s8, opening a discharge valve, starting a stirrer switch to connect the prepared bentonite into a storage barrel through a discharge port, numbering and sealing for later use;
s9, taking a part of samples in the storage barrel to test the water content, comparing the target water content, and adjusting the water adding amount in real time.
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| CN210173895U (en) * | 2019-05-29 | 2020-03-24 | 青岛土木建工集团有限公司 | Stirring device |
| CN212236815U (en) * | 2020-05-21 | 2020-12-29 | 核工业北京地质研究院 | Device is prepared in batches to specific moisture content bentonite |
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2020
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| CN109986693A (en) * | 2017-12-31 | 2019-07-09 | 中国人民解放军63653部队 | The uniform humidification device of clay material |
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| CN212236815U (en) * | 2020-05-21 | 2020-12-29 | 核工业北京地质研究院 | Device is prepared in batches to specific moisture content bentonite |
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