CN112830504A - Process for recycling papermaking alkali by replacing part of lime with carbide slag - Google Patents
Process for recycling papermaking alkali by replacing part of lime with carbide slag Download PDFInfo
- Publication number
- CN112830504A CN112830504A CN202110279807.3A CN202110279807A CN112830504A CN 112830504 A CN112830504 A CN 112830504A CN 202110279807 A CN202110279807 A CN 202110279807A CN 112830504 A CN112830504 A CN 112830504A
- Authority
- CN
- China
- Prior art keywords
- screening
- lime
- carbide slag
- wall
- equipment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 235000008733 Citrus aurantifolia Nutrition 0.000 title claims abstract description 58
- 235000011941 Tilia x europaea Nutrition 0.000 title claims abstract description 58
- 239000004571 lime Substances 0.000 title claims abstract description 58
- 239000002893 slag Substances 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000003513 alkali Substances 0.000 title claims abstract description 21
- 238000004064 recycling Methods 0.000 title claims abstract description 18
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 81
- 238000011084 recovery Methods 0.000 claims abstract description 16
- 238000001704 evaporation Methods 0.000 claims abstract description 15
- 230000008020 evaporation Effects 0.000 claims abstract description 15
- 238000002485 combustion reaction Methods 0.000 claims abstract description 7
- 238000007599 discharging Methods 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 238000012216 screening Methods 0.000 claims description 68
- 239000000843 powder Substances 0.000 claims description 25
- 239000004744 fabric Substances 0.000 claims description 19
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 16
- 238000009993 causticizing Methods 0.000 claims description 12
- 239000000839 emulsion Substances 0.000 claims description 12
- 206010040007 Sense of oppression Diseases 0.000 claims description 9
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 4
- 239000000920 calcium hydroxide Substances 0.000 claims description 4
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000001914 filtration Methods 0.000 description 3
- 239000005997 Calcium carbide Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D1/00—Oxides or hydroxides of sodium, potassium or alkali metals in general
- C01D1/04—Hydroxides
- C01D1/20—Preparation by reacting oxides or hydroxides with alkali metal salts
- C01D1/22—Preparation by reacting oxides or hydroxides with alkali metal salts with carbonates or bicarbonates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
Abstract
The invention discloses a process for recovering papermaking alkali by replacing partial lime with carbide slag, which relates to the technical field of papermaking alkali recovery, and provides the following scheme aiming at the problem of poor recovery process of the existing papermaking alkali, wherein the process comprises the following steps: the method comprises the steps of placing black liquor generated in the papermaking process into evaporation equipment, carrying out evaporation concentration treatment on the black liquor in the evaporation equipment, placing the obtained concentrated black liquor into a combustion furnace for combustion, burning out organic matters in the black liquor, discharging residual inorganic matters from the furnace in a molten state to obtain green liquor, adding the obtained green liquor and carbide slag into a carbide slag reactor together, and carrying out heating treatment along with a steam coil. The method can effectively recycle the sodium hydroxide, can replace part of lime with the carbide slag, reduces the lime consumption for recycling the sodium hydroxide, reduces the recycling cost, has high recycling efficiency, saves the cost and has obvious effect.
Description
Technical Field
The invention relates to the technical field of papermaking alkali recovery, in particular to a process for replacing partial lime with carbide slag for papermaking alkali recovery.
Background
Paper making is used as one of basic industries of national economy, the development degree of the paper making can reflect the development of social civilization and economic construction, and the paper making product is mainly used as a basic raw material of other industries.
A small amount of sodium hydroxide needs to be added in the production process of paper, so that the problems of sodium hydroxide recovery and water treatment are caused, a certain amount of lime needs to be used in the sodium hydroxide recovery process, and the recovery cost of sodium hydroxide is greatly improved in the process, so that the carbide slag is used for replacing part of lime for the papermaking alkali recovery process.
Disclosure of Invention
The carbide slag provided by the invention replaces part of lime to be used in the paper-making alkali recovery process, so that the problem of poor paper-making alkali recovery process is solved.
In order to achieve the purpose, the invention adopts the following technical scheme:
the process of utilizing carbide slag to replace partial lime in recovering papermaking alkali includes the following steps:
s1: putting black liquor generated in the papermaking process into evaporation equipment, and carrying out evaporation concentration treatment on the black liquor in the evaporation equipment;
s2: burning the concentrated black liquor obtained in the step S1 in a combustion furnace, burning out organic matters in the black liquor, and discharging residual inorganic matters from the furnace in a molten state to obtain green liquor;
s3: adding the green liquor and the carbide slag obtained in the step S2 into a carbide slag reactor, and heating along with a steam coil, wherein calcium hydroxide in the carbide slag inside the carbide slag reactor reacts before sodium carbonate in the green liquor, so that the sodium carbonate in the green liquor is partially converted into sodium hydroxide;
s4: adding the emulsion obtained in the step S3 into a vertical digester, adding a proper amount of lime powder and green liquor, and screening lime by using screening equipment before adding the lime powder into the vertical digester to remove impurities mixed in the lime powder;
s5: adding the emulsion obtained in the step S4 into a causticizing reactor, wherein the emulsion inside the causticizing reactor is subjected to a causticizing reaction, and a sodium hydroxide solution is obtained;
s6: the sodium hydroxide solution obtained in step S5 is charged into a corresponding container, and at this time, recovery of sodium hydroxide from the black liquor is completed.
Preferably, screening chamber and equipment chamber have been seted up in proper order from the left hand right side in the inside of screening box including the screening box, the magazine is installed at the top of screening box, the magazine is corresponding with the screening chamber, the inside sliding connection of screening box has the screen cloth, the inner wall sliding connection of screening bottom half has the receiving box, the receiving box is located the below of screen cloth, the loading groove has been seted up to the inner wall between screening chamber and the equipment chamber, the equal sliding connection in inside of loading groove has the oppression piece, the top sliding fit work of oppression piece and screen cloth, the inner wall that screening chamber one side was kept away from in the equipment chamber is fixed with a plurality of pneumatic cylinders, the piston end of pneumatic cylinder is all fixed in the one side that the screen cloth was kept away from to the oppression piece.
Preferably, the two ends of the bottom of the screen are both provided with supporting blocks, the supporting blocks are fixed on the inner wall of the screening cavity, the top of each supporting block is provided with a mounting groove, the inner wall of the bottom of the mounting groove is fixed with a plurality of reset springs, the other ends of the reset springs extend out of the mounting groove and are respectively fixed at the bottom of the screen, the middle part of the pressing block is embedded with a threaded sleeve, the inner wall of the equipment cavity, which is far away from one side of the screening cavity, is rotatably connected with a threaded rod through a bearing, the threaded rod and the threaded sleeve are in threaded fit for working, a rotating shaft is arranged below the screen, one end of the rotating shaft is rotatably connected on the inner wall of the screening cavity through the bearing, the other end of the rotating shaft extends into the equipment cavity and is rotatably connected on the inner wall of the equipment cavity through the bearing, and cams, the cam and the screen cloth cooperation work, the cam rotates the cover and establishes the inside in screening chamber, the threaded rod is kept away from the outer wall of oppression piece one end and is located the equipment intracavity portion's pivot outer wall and all fixedly cup jointed the belt pulley, two the outside of belt pulley all is equipped with the drive belt, two belt pulley and drive belt transmission cooperation work.
Preferably, one side of the outside of the screening box body is hinged with a movable door through a hinge, and a sealing ring is arranged on the outer wall of the movable door along the circumferential direction.
Preferably, the inner wall between screening chamber and the equipment chamber has all been seted up and has been changeed the hole, the pivot is rotated and is connected in the inside of changeing the hole.
Preferably, the inner wall of the loading groove is provided with a rubber ring along the circumferential direction.
Preferably, the receiving box body is a box body with an upward opening.
In the invention:
1. the method can effectively recycle the sodium hydroxide, can replace part of lime with the carbide slag, reduces the lime consumption for recycling the sodium hydroxide, reduces the recycling cost, has high recycling efficiency, saves the cost and has obvious effect.
2. The lime filtering device can effectively filter lime used for recycling sodium hydroxide, remove impurities in the lime, improve the purity of the lime, effectively improve the recycling efficiency of the sodium hydroxide, quickly crush massive lime in the lime, effectively improve the reaction rate of the lime and green liquor, has high working performance, and can shake and dredge a filtering part of the lime, thereby effectively improving the permeability of the filtering part, improving the screening progress of the lime and further effectively improving the recycling progress of the sodium hydroxide.
Drawings
FIG. 1 is a schematic structural diagram of a screening box body used in a paper-making alkali recovery process by replacing part of lime with carbide slag according to the present invention;
FIG. 2 is an enlarged view of a portion A of FIG. 1;
fig. 3 is a front view of a screening box body of the calcium carbide slag instead of part of lime in the paper-making alkali recovery process.
Reference numbers in the figures: 1. screening the box body; 2. a screening chamber; 3. an equipment chamber; 4. a feeding hopper; 5. screening a screen; 6. a receiving box body; 7. a loading slot; 8. a compression block; 9. a hydraulic cylinder; 10. a support block; 11. mounting grooves; 12. a return spring; 13. a threaded sleeve; 14. a threaded rod; 15. a rotating shaft; 16. a belt pulley; 17. a transmission belt; 18. a cam; 19. a movable door.
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.
Referring to fig. 1-3, a process for recycling paper alkali by replacing part of lime with carbide slag comprises the following steps:
s1: putting black liquor generated in the papermaking process into evaporation equipment, and carrying out evaporation concentration treatment on the black liquor in the evaporation equipment;
s2: burning the concentrated black liquor obtained in the step S1 in a combustion furnace, burning out organic matters in the black liquor, and discharging residual inorganic matters from the furnace in a molten state to obtain green liquor;
s3: adding the green liquor and the carbide slag obtained in the step S2 into a carbide slag reactor, and heating along with a steam coil, wherein calcium hydroxide in the carbide slag inside the carbide slag reactor reacts before sodium carbonate in the green liquor, so that the sodium carbonate in the green liquor is partially converted into sodium hydroxide;
s4: adding the emulsion obtained in the step S3 into a vertical digester, adding a proper amount of lime powder and green liquor, and screening lime by using screening equipment before adding the lime powder into the vertical digester to remove impurities mixed in the lime powder;
s5: adding the emulsion obtained in the step S4 into a causticizing reactor, wherein the emulsion inside the causticizing reactor is subjected to a causticizing reaction, and a sodium hydroxide solution is obtained;
s6: the sodium hydroxide solution obtained in step S5 is charged into a corresponding container, and at this time, recovery of sodium hydroxide from the black liquor is completed.
Above-mentioned used screening equipment is including screening box 1, screening chamber 2 and equipment chamber 3 have been seted up in proper order from the left hand right side in the inside of screening box 1, hopper 4 is installed at the top of screening box 1, hopper 4 is corresponding with screening chamber 2, the inside sliding connection of screening box 1 has screen cloth 5, the inner wall sliding connection of screening box 1 bottom has receiving box 6, receiving box 6 is located the below of screen cloth 5, loading groove 7 has been seted up to the inner wall between screening chamber 2 and the equipment chamber 3, the equal sliding connection in inside of loading groove 7 has oppression piece 8, oppression piece 8 and screen cloth 5's top sliding fit work, the inner wall that screening chamber 2 one side was kept away from to equipment chamber 3 is fixed with a plurality of pneumatic cylinders 9, the piston end of pneumatic cylinder 9 is all fixed in one side that screen cloth 5 was kept away from to oppression piece 8.
The two ends of the bottom of the screen 5 are respectively provided with a supporting block 10, the supporting blocks 10 are fixed on the inner wall of the screening cavity 2, the top of each supporting block 10 is provided with a mounting groove 11, the inner wall of the bottom of the mounting groove 11 is fixed with a plurality of reset springs 12, the other ends of the reset springs 12 extend out of the mounting groove 11 and are respectively fixed at the bottom of the screen 5, the middle part of the pressing block 8 is embedded with a threaded sleeve 13, the inner wall of one side of the equipment cavity 3, far away from the screening cavity 2, is rotatably connected with a threaded rod 14 through a bearing, the threaded rod 14 is in threaded fit with the threaded sleeve 13, a rotating shaft 15 is arranged below the screen 5, one end of the rotating shaft 15 is rotatably connected on the inner wall of the screening cavity 2 through a bearing, the other end of the rotating shaft 15 extends into the equipment cavity 3 and is rotatably connected on the inner wall of the equipment cavity 3, cam 18 and screen cloth 5 cooperation work, cam 18 rotate the cover and establish the inside in screening chamber 2, threaded rod 14 keeps away from the outer wall of oppression piece 8 one end and is located the inside pivot 15 outer wall of equipment chamber 3 and all fixedly cup joints belt pulley 16, and two belt pulley 16's outside all is equipped with drive belt 17, and two belt pulley 16 and drive belt 17 transmission cooperation work.
One side of the outside of the screening box body 1 is hinged with a movable door 19 through a hinge, the outer wall of the movable door 19 is provided with a sealing ring along the circumferential direction, and the sealing performance of the screening box body 1 can be improved through the sealing ring.
The inner wall between screening chamber 2 and the equipment chamber 3 has all been seted up and has been changeed the hole, and pivot 15 rotates to be connected in the inside of changeing the hole, and through changeing the hole, pivot 15 can carry out nimble rotation.
The inner wall of the loading groove 7 is provided with a rubber ring along the circumferential direction. The receiving box 6 is a box with an upward opening, and the sealing performance of the screening cavity 2 can be improved through the rubber ring.
The working principle is as follows: putting black liquor generated in the papermaking process into evaporation equipment, carrying out evaporation concentration treatment on the black liquor in the evaporation equipment, putting the obtained concentrated black liquor into a combustion furnace for combustion, burning out organic matters in the black liquor, discharging the rest inorganic matters from the furnace in a molten state to obtain green liquor, adding the obtained green liquor and carbide slag into a carbide slag reactor together, and carrying out heating treatment along with a steam coil pipe, wherein calcium hydroxide in the carbide slag reactor reacts before sodium carbonate in the green liquor to convert part of the sodium carbonate in the green liquor into sodium hydroxide, at the moment, a user can put lime powder to be used into a feeding hopper 4, the lime powder entering into the feeding hopper 4 falls into a screening cavity 2, and the lime powder entering into the screening cavity 2 falls onto the top of a screen 5, at this time, the lime powder falling on the top of the screen 5 is screened by the screen 5, at this time, impurities in the lime powder and lime powder blocks condensed into blocks are screened on the top of the screen 5 by the screen 5, the pure lime powder passing through the screen 5 falls inside the receiving box 6, at this time, the pure lime powder can be received by the receiving box 6, then, a user opens the movable door 19, the receiving box 6 inside the screening chamber 2 is taken out, at this time, the emulsion obtained before can be added into the vertical digester, and a proper amount of pure lime powder and green liquor inside the receiving box 6 are added, at this time, the obtained emulsion is added into the causticizing reactor, at this time, the emulsion inside the causticizing reactor can be subjected to causticizing reaction, at this time, a sodium hydroxide solution can be obtained, the obtained sodium hydroxide solution is filled into a corresponding receiving container, at this time, the recovery of sodium hydroxide in the black liquor is finished, when a certain amount of lime powder blocks are accumulated on the top of the screen 5, the piston end of the hydraulic cylinder 9 can be driven to discharge through the operation of the hydraulic cylinder 9, the compression block 8 is driven to displace, the displaced compression block 8 can push the lime powder blocks on the top of the screen 5 to displace, when the lime powder blocks are contacted with the inner wall of the screening cavity 2, the lime powder blocks on the top of the screen 5 can be crushed through the displaced compression block 8 and the inner wall of the screening cavity 2, and then the lime powder blocks on the top of the screen 5 can be promoted to enter the receiving box 6 through the screen 5, so that the utilization efficiency of the lime powder is effectively improved, the cost is saved, and when the screen holes of the screen 5 are blocked by the lime powder after the screen 5 is screened for a long time, the piston end of the hydraulic cylinder 9 can be driven to contract through the operation of the hydraulic cylinder 9, and the piston end of the contracted hydraulic cylinder 9 can drive the compression block 8 to displace, drive the swivel nut 13 that oppresses 8 middle parts and carry out the displacement, accessible swivel nut 13 and threaded rod 14's screw-thread fit work this moment, it rotates to drive threaded rod 14, drive belt pulley 16 on the threaded rod 14 and rotate, it moves to drive belt 17, drive belt pulley 16 in the pivot 15 and rotate, it rotates to drive threaded rod 14, it rotates to drive cam 18, accessible pivoted cam 18 oppresses screen cloth 5 this moment, accessible screen cloth 5 and the sliding fit work in screening chamber 2 this moment, elasticity through reset spring 12, it vibrates to drive screen cloth 5, the screen cloth 5 that the accessible was vibrated this moment, vibrate the mediation to screen cloth 5's sieve mesh, thereby the penetrating quality of effectual improvement screen cloth 5.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. The process of utilizing carbide slag to replace partial lime in recovering papermaking alkali includes the following steps:
s1: putting black liquor generated in the papermaking process into evaporation equipment, and carrying out evaporation concentration treatment on the black liquor in the evaporation equipment;
s2: burning the concentrated black liquor obtained in the step S1 in a combustion furnace, burning out organic matters in the black liquor, and discharging residual inorganic matters from the furnace in a molten state to obtain green liquor;
s3: adding the green liquor and the carbide slag obtained in the step S2 into a carbide slag reactor, and heating along with a steam coil, wherein calcium hydroxide in the carbide slag inside the carbide slag reactor reacts before sodium carbonate in the green liquor, so that the sodium carbonate in the green liquor is partially converted into sodium hydroxide;
s4: adding the emulsion obtained in the step S3 into a vertical digester, adding a proper amount of lime powder and green liquor, and screening lime by using screening equipment before adding the lime powder into the vertical digester to remove impurities mixed in the lime powder;
s5: adding the emulsion obtained in the step S4 into a causticizing reactor, wherein the emulsion inside the causticizing reactor is subjected to a causticizing reaction, and a sodium hydroxide solution is obtained;
s6: the sodium hydroxide solution obtained in step S5 is charged into a corresponding container, and at this time, recovery of sodium hydroxide from the black liquor is completed.
2. The process for recycling the papermaking alkali by replacing partial lime with the carbide slag according to claim 1, wherein the used screening equipment comprises a screening box body (1), a screening cavity (2) and an equipment cavity (3) are sequentially formed in the screening box body (1) from left to right, a feeding hopper (4) is installed at the top of the screening box body (1), the feeding hopper (4) corresponds to the screening cavity (2), a screen (5) is connected in the screening box body (1) in a sliding manner, a receiving box body (6) is connected to the inner wall of the bottom of the screening box body (1) in a sliding manner, the receiving box body (6) is located below the screen (5), a loading groove (7) is formed in the inner wall between the screening cavity (2) and the equipment cavity (3), and pressing blocks (8) are connected in the loading groove (7) in a sliding manner, oppress the top sliding fit work of piece (8) and screen cloth (5), the inner wall that screening chamber (2) one side was kept away from in equipment chamber (3) is fixed with a plurality of pneumatic cylinders (9), the piston end of pneumatic cylinder (9) is all fixed in the piece (8) of oppressing one side of keeping away from screen cloth (5).
3. The process for recycling the papermaking alkali by replacing partial lime with the carbide slag according to claim 2, wherein supporting blocks (10) are arranged at two ends of the bottom of the screen (5), the supporting blocks (10) are fixed on the inner wall of the screening cavity (2), mounting grooves (11) are formed in the tops of the supporting blocks (10), a plurality of return springs (12) are fixed on the inner wall of the bottom of the mounting grooves (11), the other ends of the return springs (12) extend out of the mounting grooves (11) and are respectively fixed at the bottoms of the screen (5), threaded sleeves (13) are embedded in the middle of the pressing block (8), threaded rods (14) are rotatably connected to the inner wall of one side, away from the screening cavity (2), of the equipment cavity (3) through bearings, the threaded rods (14) are in threaded fit with the threaded sleeves (13), rotating shafts (15) are arranged below the screen (5), the one end of pivot (15) is passed through the bearing and is rotated the connection on the inner wall of screening chamber (2), the other end of pivot (15) extends to the inside of equipment chamber (3) to rotate the connection on the inner wall of equipment chamber (3) through the bearing, lie in that the outer wall of pivot (15) both ends inside screening chamber (2) is all fixed cam (18) of having cup jointed, cam (18) and screen cloth (5) cooperation work, cam (18) rotate the cover and establish the inside in screening chamber (2), threaded rod (14) are kept away from the outer wall of oppression piece (8) one end and are located the pivot (15) outer wall of equipment chamber (3) inside and have all fixedly cup jointed belt pulley (16), two the outside of belt pulley (16) all is equipped with drive belt (17), two belt pulley (16) and drive belt (17) transmission cooperation work.
4. The process for recycling the papermaking alkali by replacing part of lime with carbide slag according to claim 2, wherein one side of the outside of the screening box body (1) is hinged with a movable door (19) through a hinge, and the outer wall of the movable door (19) is provided with a sealing ring along the circumferential direction.
5. The process for recycling the papermaking alkali by replacing part of lime with the carbide slag according to claim 3, wherein rotary holes are formed in the inner wall between the screening cavity (2) and the equipment cavity (3), and the rotary shaft (15) is rotatably connected to the inner parts of the rotary holes.
6. The process for recycling paper-making alkali by replacing part of lime with carbide slag according to claim 2, characterized in that the inner wall of the loading tank (7) is provided with a rubber ring along the circumferential direction.
7. The process for recycling paper making alkali according to claim 2, characterized in that the receiving box (6) is an upward opening box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110279807.3A CN112830504A (en) | 2021-03-16 | 2021-03-16 | Process for recycling papermaking alkali by replacing part of lime with carbide slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110279807.3A CN112830504A (en) | 2021-03-16 | 2021-03-16 | Process for recycling papermaking alkali by replacing part of lime with carbide slag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112830504A true CN112830504A (en) | 2021-05-25 |
Family
ID=75930201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110279807.3A Pending CN112830504A (en) | 2021-03-16 | 2021-03-16 | Process for recycling papermaking alkali by replacing part of lime with carbide slag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112830504A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1239166A (en) * | 1998-06-14 | 1999-12-22 | 艾天召 | Process for causticizing green solution of alkali recovered from black liquid of paper-making |
| CN101591029A (en) * | 2008-05-28 | 2009-12-02 | 北京紫光英力化工技术有限公司 | Causticizing process prepares the novel process of caustic soda and super fine calcium carbonate |
| CN105040503A (en) * | 2015-06-18 | 2015-11-11 | 重庆鹏越科技发展有限公司 | Novel application of acetylene sludge to light-industry papermaking production |
| CN109554947A (en) * | 2017-09-25 | 2019-04-02 | 国际竹藤中心 | A kind of optimization technique of papermaking wastewater alkali collection |
| CN212349414U (en) * | 2020-06-06 | 2021-01-15 | 曾金 | But civil engineering is with sand screen of automatic clear rubble |
-
2021
- 2021-03-16 CN CN202110279807.3A patent/CN112830504A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1239166A (en) * | 1998-06-14 | 1999-12-22 | 艾天召 | Process for causticizing green solution of alkali recovered from black liquid of paper-making |
| CN101591029A (en) * | 2008-05-28 | 2009-12-02 | 北京紫光英力化工技术有限公司 | Causticizing process prepares the novel process of caustic soda and super fine calcium carbonate |
| CN105040503A (en) * | 2015-06-18 | 2015-11-11 | 重庆鹏越科技发展有限公司 | Novel application of acetylene sludge to light-industry papermaking production |
| CN109554947A (en) * | 2017-09-25 | 2019-04-02 | 国际竹藤中心 | A kind of optimization technique of papermaking wastewater alkali collection |
| CN212349414U (en) * | 2020-06-06 | 2021-01-15 | 曾金 | But civil engineering is with sand screen of automatic clear rubble |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100441508C (en) | New technique for refining filler of calcium carbonate from lime mud | |
| CN112830504A (en) | Process for recycling papermaking alkali by replacing part of lime with carbide slag | |
| CN211989566U (en) | Domestic waste screening plant | |
| CN114308243A (en) | Aralia glossy ganoderma capsule production is with raw materials broken wall reducing mechanism | |
| WO2001007712A1 (en) | Use of alkyleneamines for enhancing lime mud dewatering | |
| CN107724145A (en) | A kind of pulping device with slag removing function | |
| CN211707040U (en) | Carbon brick production is with hierarchical screening breaker that vibrates | |
| CN210287950U (en) | Thick liquids are sieving mechanism in advance | |
| CN211514641U (en) | Refractory material raw material crushing device | |
| CN114602340A (en) | Production mud agitating unit for backfill agent | |
| CN215940259U (en) | Chemical industry is with clamp plate breaker | |
| CN105074085B (en) | Method for auxiliary air caustization green liquor | |
| CN112844686A (en) | Textile waste treatment device | |
| CN217265374U (en) | Sludge dewatering device for hydraulic engineering | |
| CN212594155U (en) | Calcium carbonate production is with integrative device that deposits and dehydration combine | |
| CN205398130U (en) | Carbide slag preparation industry naoh reaction unit | |
| CN215783952U (en) | Grinder is used in production of Ru base catalyst | |
| CN216174037U (en) | Raw material filtering device for chemical fiber production | |
| CN218048847U (en) | Horizontal rotary screening machine for activated carbon | |
| KR200365088Y1 (en) | Apparatus for Salt Exclusion and Water Dehydration of a Food Garbage | |
| CN214763650U (en) | A mud filter-pressing device for titanium white powder production | |
| CN101108390A (en) | White clay recycling process | |
| CN209934911U (en) | Ladle slag production preparation facilities | |
| CN210434842U (en) | Sand source screening device for sand storage | |
| CN212882649U (en) | Part recovery device for alloy atomic lock |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210525 |