A harmless treatment process for white mud

Abstract

The present invention discloses a harmless treatment process for white mud, comprising the following steps: step S1, naturally drying the white mud, and regularly turning the white mud to break it up; step S2, transmitting the white mud to the inside of a microwave device through a conveyor belt for drying, and crystallizing the silicon element in the white mud through microwaves; step S3, separating the crystals of the silicon element from the white mud through screening, and then continuing to dry the white mud; step S4, grinding the fully dried white mud; step S5, completing the recycling of the ground white mud. Through the process of the present invention, the silicon element in the white mud can be effectively separated, and the treatment effect of the white mud can be improved. And by screening the silicon element crystals and the white mud, the silicon element crystals are recycled and reused, thereby reducing resource waste, and the white mud is dried again, the water content in the white mud is further reduced, and the reuse of the white mud is convenient.

Description

Technical Field

[0001] The invention belongs to the technical field of sludge drying, and in particular relates to a white mud harmless treatment process. Background Art

[0002] White mud is a non-metallic mineral, a kind of clay and clay rock mainly composed of kaolinite clay minerals. Because it is white and fine, it is also called dolomite. At present, a lot of work has been done on the comprehensive utilization of white mud at home and abroad, mainly using white mud to produce ordinary silicate cement, alkali slag bricks, plaster mortar and papermaking; using white mud for flue gas desulfurization, producing calcium magnesium fertilizer or soil conditioner, rubber material and alkali slag and padding material, etc.

[0003] In the prior art, for example, the technical solution recorded in the invention patent “A method for recovering white mud and / or PET to prepare polyester polyols” with application number: “CN202210437232.8”, “A method for recovering white mud and / or PET to prepare polyester polyols, the preparation steps of which include: S1 recovered PET, diol, and catalyst, reacting under ultrasound and stirring to obtain an alcoholysis product; or recovering alkali-reduced white mud and / or PTA pool material, diol, and catalyst, and reacting to obtain a prepolymer; S2 filtering the alcoholysis product or prepolymer; S3 cooling the filtrate of the alcoholysis product and / or prepolymer; S4 the filtrate enters the esterification kettle, and diols and / or triols, dibasic acids and / or acid anhydrides, and catalysts are added in proportion to carry out esterification reaction; S5 after the esterification is completed, the material is filtered and transferred to a polycondensation reactor for polycondensation reaction; S6 after the polycondensation is completed, the material is filtered, cooled, and packaged.” There is no effective drying treatment for the white mud. If the white mud is not treated thoroughly, a large amount of waste will still be generated even after treatment. The main reason is that the silicon element in the white mud cannot be separated, especially the traditional drying, which only has no penetration on the surface and the drying efficiency is relatively low. Summary of the invention

[0004] The purpose of the present invention is to provide a harmless treatment process for white mud to solve the problem in the prior art mentioned in the background technology that the silicon element in the white mud cannot be separated, especially the traditional drying, which only has no penetration on the surface and the drying efficiency is relatively low.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A harmless treatment process for white mud comprises the following steps:

[0007] Step S1, airing the white mud naturally and turning the white mud regularly to break it up;

[0008] Step S2, transferring the white mud to the interior of the microwave device for drying through the feeding device, and crystallizing the silicon element in the white mud through microwaves;

[0009] Step S3, separating the silicon crystals from the white mud by screening, and then continuing to dry the white mud;

[0010] Step S4, grinding the fully dried white mud;

[0011] Step S5, the ground white mud is recycled.

[0012] According to the above technical solution, in step S1, the natural drying time of the white mud is 60 to 72 hours, and the humidity of the naturally dried white mud is 20%.

[0013] According to the above technical solution, in step S1, the white mud needs to be broken up into particles of 1 cm to 4 cm.

[0014] According to the above technical solution, in step S3, the moisture content of the dried white mud is 3% to 5%.

[0015] According to the above technical solution, the microwave device includes a shell, and a first processing cavity and a second processing cavity are arranged inside the shell; wherein the first processing cavity and the second processing cavity are communicated.

[0016] According to the above technical solution, the first processing chamber includes a feed port and a discharge port, the feed port of the first processing chamber is connected to the loading device; the discharge port of the first processing chamber is connected to the second processing chamber, and the first processing chamber and the second processing chamber are separated by a partition;

[0017] A screening device is arranged inside the first processing chamber, and the screening device is used to screen the white mud and remove solid impurities in the white mud; an ultrasonic treatment box is arranged below the screening device, and the ultrasonic treatment box is used to perform ultrasonic pre-treatment on the white mud; a conveyor belt is also arranged below the ultrasonic treatment box, and the conveyor belt passes through the discharge port and extends to the inside of the second processing chamber.

[0018] According to the above technical solution, a microwave heating device is arranged inside the second processing chamber, and the microwave heating device is arranged on the inner wall of the second processing chamber;

[0019] A drying plate is arranged in the middle of the second processing chamber, and the drying plate includes a plate body and an enclosure; a groove is arranged at the lower end of the enclosure, and the plate body is rotatably arranged inside the groove, and the plate body is rotatably connected to the enclosure; a stirring assembly is arranged on the side wall of the enclosure, and the stirring assembly is used to turn over the white mud on the plate body; a driving device is arranged below the drying plate, and the driving device is connected to the plate body and is used to drive the plate body to rotate.

[0020] According to the above technical solution, the stirring assembly includes a connecting rod and a tipping bucket, wherein the connecting rod is fixedly arranged on the side wall of the enclosure, the tipping bucket is an arc-shaped structure, and a mounting hole is arranged above the tipping bucket, and the tipping bucket is rotatably connected to the connecting rod through the mounting hole.

[0021] According to the above technical solution, an air collecting hood is arranged above the drying plate, and an exhaust pipe is arranged above the air collecting hood. The exhaust pipe extends from the inside of the second processing chamber to the outside of the second processing chamber for exhausting the steam in the second processing chamber.

[0022] According to the above technical solution, a sorting device is arranged below the drying plate, and the sorting device is used to screen the white mud and the precipitated silicon element crystals.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] Through the process of the present invention, the silicon element in the white mud can be effectively separated, thereby improving the treatment effect of the white mud.

[0025] In the present invention, the water content in the white mud is reduced by natural drying of the white mud, and the natural pretreatment of the white mud is achieved, which can effectively reduce the energy consumption of subsequent treatment. The white mud is then heated by a microwave device to precipitate silicon crystals in the white mud, and the silicon crystals are screened from the white mud to be recycled and reused, thereby reducing resource waste, and the white mud is dried again to further reduce the water content in the white mud, which is convenient for the reuse of the white mud. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the internal structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the internal structure of the first processing chamber of the present invention;

[0028] Figure 3 It is a schematic diagram of the drying plate structure of the present invention;

[0029] Figure 4 It is a schematic diagram of the disk structure of the present invention;

[0030] Figure 5 It is a schematic diagram of the enclosure structure of the present invention.

[0031] Markings in the figure: 100-housing, 200-first processing chamber, 300-second processing chamber, 400-partition, 500-feed port, 600-discharge port, 700-loading device, 800-screening device, 900-ultrasonic treatment box, 110-transmission belt, 111-microwave heating device, 112-drying plate, 113-plate body, 114-enclosure, 115-groove, 116-driving device, 117-connecting rod, 118-tipping bucket, 119-gas collecting hood, 120-exhaust pipe, 121-sorting device, 122-discharge pipe, 123-discharge port, 124-first conveyor belt, 125-second conveyor belt. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0033] Embodiment 1

[0034] A harmless treatment process for white mud comprises the following steps:

[0035] Step S1, airing the white mud naturally and turning the white mud regularly to break it up;

[0036] Step S2, transferring the white mud to the interior of the microwave device for drying through the feeding device 700, and crystallizing the silicon element in the white mud through microwaves;

[0037] Step S3, separating the silicon crystals from the white mud by screening, and then continuing to dry the white mud;

[0038] Step S4, grinding the fully dried white mud;

[0039] Step S5, the ground white mud is recycled.

[0040] In step S1, the natural drying time of the white mud is 60 to 72 hours, and the humidity of the naturally dried white mud is 20%.

[0041] In step S1, the white mud needs to be broken up into particles of 1 cm to 4 cm.

[0042] In step S3, the moisture content of the dried white mud is 3% to 5%.

[0043] Through the process of the present invention, the silicon element in the white mud can be effectively separated, thereby improving the treatment effect of the white mud.

[0044] In the present invention, the water content in the white mud is reduced by natural drying of the white mud, and the natural pretreatment of the white mud is achieved, which can effectively reduce the energy consumption of subsequent treatment. The white mud is then heated by a microwave device to precipitate silicon crystals in the white mud, and the silicon crystals are screened from the white mud to be recycled and reused, thereby reducing resource waste, and the white mud is dried again to further reduce the water content in the white mud, which is convenient for the reuse of the white mud.

[0045] Embodiment 2

[0046] This embodiment is a further refinement of the first embodiment. Figures 1 to 5As shown, a microwave drying device includes a housing 100, and a first processing chamber 200 and a second processing chamber 300 are arranged inside the housing 100; wherein the first processing chamber 200 and the second processing chamber 300 are connected; the first processing chamber 200 includes a feed port 500 and a discharge port 600, and the feed port 500 of the first processing chamber 200 is connected to a loading device 700; the discharge port 600 of the first processing chamber 200 is connected to the second processing chamber 300; and the first processing chamber 200 and the second processing chamber 300 are separated by a partition 400.

[0047] like Figure 2 As shown, a screening device 800 is arranged inside the first processing chamber 200, and the screening device 800 is used to screen the white mud and remove solid impurities in the white mud; an ultrasonic treatment box 900 is arranged below the screening device 800, and the ultrasonic treatment box 900 is used to perform ultrasonic pre-treatment on the white mud; a conveyor belt 110 is also arranged below the ultrasonic treatment box 900, and the conveyor belt 110 passes through the discharge port 600 and extends to the interior of the second processing chamber 300.

[0048] By arranging a screening device 800 inside the first processing chamber 200, the dried white mud shell 100 is screened, so that solid impurities that cannot be heated and evaporated (such as stones) are screened out.

[0049] Furthermore, the screening device 800 uses a vibrating screen. Since the white mud is solid particles after being dried, the vibrating screen is used to further vibrate the white mud. After the white mud is screened, in addition to screening out solid impurities, the white mud can also become finer, thereby improving the ability of the white mud to be heated by microwaves.

[0050] like Figure 1 As shown, a microwave heating device 111 is disposed inside the second processing chamber 300, and the microwave heating device 111 is disposed on the inner wall of the second processing chamber 300;

[0051] like Figures 3 to 5As shown, a drying plate 112 is arranged in the middle of the second processing chamber 300, and the drying plate 112 includes a plate body 113 and an enclosure 114; wherein, a groove 115 is arranged at the lower end of the enclosure 114, and the plate body 113 is rotatably arranged inside the groove 115, and the plate body 113 is rotatably connected to the enclosure 114; a stirring assembly is arranged on the side wall of the enclosure 114, and the stirring assembly is used to turn over the white mud on the plate body 113; a driving device 116 is arranged below the drying plate 112, and the driving device 116 is connected to the plate body 113, and is used to drive the plate body 113 to rotate; the stirring assembly includes a connecting rod 117 and a tipping bucket 118, wherein the connecting rod 117 is fixedly arranged on the side wall of the enclosure 114, the tipping bucket 118 is an arc-shaped structure, and a mounting hole is arranged above the tipping bucket 118, and the tipping bucket 118 is rotatably connected to the connecting rod 117 through the mounting hole.

[0052] Further, such as Figure 4 As shown, a discharge pipe 122 is provided below the disc 113 , and a discharge port 123 is provided in the middle of the disc 113 . The discharge pipe 122 is connected to the discharge port 123 , and the middle of the disc 113 is tilted downward to facilitate the discharge of white mud from the discharge port 123 .

[0053] Furthermore, the driving device 116 includes a driving motor and a belt; wherein the belt is used to connect the driving motor and the discharge pipe 122, so as to drive the disc body 113 to rotate through the driving motor.

[0054] The white mud after screening and ultrasonic pretreatment is put into the drying plate 112, and the driving device 116 drives the drying plate 112 to rotate, and the stirring component turns and stirs the white mud, so that the white mud can be quickly heated and the water in the white mud is evaporated, thereby improving the precipitation effect of the silicon element crystallization in the white mud and improving the processing efficiency of the white mud.

[0055] In the present invention, the working principle of the microwave equipment is: the dried white mud is sent to the inside of the first processing chamber 200 through the feeding device 700, and the white mud is screened by the screening device 800 in the first processing chamber 200 to remove solid impurities; the white mud is ultrasonically treated by the ultrasonic treatment box 900, so that the gaps of the white mud become larger, thereby improving the evaporation effect.

[0056] The white mud is then heated by the microwave heating device 111 in the second processing chamber 300 to crystallize the silicon element in the white mud and further treat the white mud harmlessly. The driving device 116 drives the drying plate 112 to rotate, so that the white mud is heated evenly and the evaporation effect is better. The white mud is stirred by the stirring device and the white mud is continuously turned over, so that the evaporation of the white mud is more even, and the treatment effect of the white mud is improved.

[0057] Embodiment 3

[0058] This embodiment is a further refinement of the second embodiment. Figure 1 As shown, an air collecting hood 119 is arranged above the drying plate 112, and an exhaust pipe 120 is arranged above the air collecting hood 119. The exhaust pipe 120 extends from the inside of the second processing chamber 300 to the outside of the second processing chamber 300, and is used to discharge the steam in the second processing chamber 300; a sorting device 121 is arranged below the drying plate 112, and the sorting device 121 is used to screen the white mud and the precipitated silicon element crystals.

[0059] An air collecting hood 119 is provided on the drying plate 112, and the water vapor evaporated from the white mud is collected by the air collecting hood 119, and the collected water vapor is discharged to prevent the water vapor from gathering inside the housing 100 and reducing the evaporation effect of the white mud.

[0060] The exhaust pipe 120 is provided to connect the gas collecting hood 119 and the outside of the housing 100 to exhaust the water vapor inside the second processing chamber 300.

[0061] like Figure 3 As shown, the sorting device 121 includes a first conveyor belt 124 and a second conveyor belt 125; wherein, the first conveyor belt 124 is arranged in the middle of the second conveyor belt 125, and the first conveyor belt 124 is arranged through the second conveyor belt 125; filter holes are arranged on the second conveyor belt 125, and the filter holes are used to filter silicon element crystals; the filtered white mud passes through the filter holes and falls on the first conveyor belt 124, and is transferred to other processing equipment through the first conveyor belt 124 for drying the white mud.

[0062] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0063] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A harmless treatment process for white mud, characterized by: The following steps are involved: Step S1, airing the white mud naturally and turning the white mud regularly to break it up; Step S2, transferring the white mud to the interior of the microwave device for drying through the feeding device (700), and crystallizing the silicon element in the white mud through microwaves; Step S3, separating the silicon crystals from the white mud by screening, and then continuing to dry the white mud; Step S4, grinding the fully dried white mud; Step S5, recycling the ground white mud; The microwave device comprises a housing (100), wherein a first processing chamber (200) and a second processing chamber (300) are arranged inside the housing (100); wherein the first processing chamber (200) and the second processing chamber (300) are connected, and the first processing chamber (200) and the second processing chamber (300) are separated by a partition (400); the first processing chamber (200) comprises a feed inlet (500) and a discharge outlet (600), and the feed inlet (500) of the first processing chamber (200) is connected to a loading device (700); and the discharge outlet (600) of the first processing chamber (200) is connected to the second processing chamber (300); A screening device (800) is arranged inside the first processing chamber (200), and the screening device (800) is used to screen the white mud and remove solid impurities in the white mud; an ultrasonic treatment box (900) is arranged below the screening device (800), and the ultrasonic treatment box (900) is used to perform ultrasonic pretreatment on the white mud; a conveyor belt (110) is also arranged below the ultrasonic treatment box (900), and the conveyor belt (110) passes through the discharge port (600) and extends to the inside of the second processing chamber (300); A microwave heating device (111) is arranged inside the second processing chamber (300), and the microwave heating device (111) is arranged on the inner wall of the second processing chamber (300); A drying plate (112) is arranged in the middle of the second processing chamber (300), and the drying plate (112) comprises a plate body (113) and a surrounding baffle (114); wherein a groove (115) is arranged at the lower end of the surrounding baffle (114), and the plate body (113) is rotatably arranged inside the groove (115), and the plate body (113) and the surrounding baffle (114) are rotatably connected; a stirring assembly is arranged on the side wall of the surrounding baffle (114), and the stirring assembly is used to stir the white mud on the plate body (113); and a driving device (116) is arranged below the drying plate (112), and the driving device (116) is connected to the plate body (113) and is used to drive the plate body (113) to rotate.

2. A harmless treatment process for white mud according to claim 1, characterized in that: In step S1, the natural drying time of the white mud is 60 to 72 hours, and the humidity of the naturally dried white mud is 20%.

3. A harmless treatment process for white mud according to claim 1, characterized in that: In step S1, the white mud needs to be broken up into particles of 1 cm to 4 cm.

4. The harmless treatment process of white mud according to claim 1 is characterized in that: In step S3, the moisture content of the dried white mud is 3% to 5%.

5. A harmless treatment process for white mud according to claim 4, characterized in that: The stirring assembly comprises a connecting rod (117) and a tipping bucket (118), wherein the connecting rod (117) is fixedly arranged on the side wall of the enclosure (114), the tipping bucket (118) is an arc-shaped structure, a mounting hole is arranged above the tipping bucket (118), and the tipping bucket (118) is rotatably connected to the connecting rod (117) through the mounting hole.

6. A harmless treatment process for white mud according to claim 5, characterized in that: An air collecting hood (119) is arranged above the drying plate (112), and an exhaust pipe (120) is arranged above the air collecting hood (119). The exhaust pipe (120) extends from the inside of the second processing chamber (300) to the outside of the second processing chamber (300) and is used to exhaust steam in the second processing chamber (300).

7. A harmless treatment process for white mud according to claim 6, characterized in that: A sorting device (121) is provided below the drying plate (112), and the sorting device (121) is used to screen the white mud and the precipitated silicon element crystals.

Images