CN114950268A - Papermaking wastewater recycling process and device - Google Patents
Papermaking wastewater recycling process and device Download PDFInfo
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- CN114950268A CN114950268A CN202210378536.1A CN202210378536A CN114950268A CN 114950268 A CN114950268 A CN 114950268A CN 202210378536 A CN202210378536 A CN 202210378536A CN 114950268 A CN114950268 A CN 114950268A
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
- B01J2/22—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by pressing in moulds or between rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
- B01J2/28—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic using special binding agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/26—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof
- C02F2103/28—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof from the paper or cellulose industry
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention discloses a papermaking wastewater recovery treatment process which is characterized by comprising the following raw materials in parts by weight: 90-110 parts of mineral powder, 0.8-1.2 parts of adhesive and 13-18 parts of papermaking wastewater; the raw materials are subjected to the following steps: (a) pelletizing the raw materials into pellets by a pelletizer; (b) and sintering the pellets in a kiln. The invention adopts the papermaking wastewater to replace common water, can treat the sewage generated by a paper mill, and can solve the problems of difficult treatment of dissolved and colloidal Substances (SCD) in the papermaking wastewater, high treatment cost and the like; meanwhile, the usage amount of the binder can be reduced by about 50%, meanwhile, the organic matters in the papermaking wastewater can provide certain heat, and gases such as CO2 and the like are discharged when the organic matters are combusted during sintering, so that loose and porous sintered pellets are obtained. In addition, the invention also discloses a device for realizing the process.
Description
Technical Field
The invention belongs to the field of water pollution treatment, and particularly relates to a process and a device for recycling papermaking wastewater.
Background
The main raw materials used by pulping and paper making plants are wood and various grass raw materials, and the materials need to be prepared and pretreated before being put into the pulping process; this process requires the use of large volumes of water for rinsing or washing, and therefore produces waste water containing a certain amount of extracted constituents of wood, which are present in the form of dissolved and colloidal Substances (SCD), known as "anionic trash".
The traditional treatment method mainly focuses on the treatment of Suspended Solids (SS), and mechanical effects such as a disc filter, a flotation device, a sedimentation clarifier and the like are utilized, so that the traditional filtration method cannot achieve a good purification effect, organic matters and fiber carbon in the traditional filtration method cause waste, and a large amount of sewage treatment cost is generated, which is not beneficial to energy conservation, consumption reduction, emission reduction, environmental protection and economic benefits.
In addition, in the metallurgical industry, about 15 percent of water and about 2 percent of binder are required to be added in the sintering preparation process of the pellets, and the defects that the use amount of the binder required by meeting the strength requirement of the pellets is large, sintering is not facilitated when fine concentrate powder is excessively fine, air holes are few, and air permeability is not good exist.
Disclosure of Invention
In order to solve one or more problems of the defects in the prior art, the invention provides a papermaking wastewater recycling treatment process.
In order to achieve the aim, the invention provides a papermaking wastewater recycling treatment process which is characterized by comprising the following raw materials in parts by weight:
90-110 parts of mineral powder
0.8 to 1.2 portions of adhesive
13-18 parts of papermaking wastewater
The raw materials are subjected to the following steps:
(a) pelletizing the raw materials into pellets through a pelletizer;
(b) and sintering the pellets in a kiln.
By adopting the scheme, firstly, the papermaking wastewater is adopted to replace common water, and only the sewage is mixed according to a specific proportion, so that the sewage generated by a papermaking factory can be treated, and the problems of difficult treatment of dissolved and colloidal Substances (SCD) in the papermaking wastewater, high treatment cost and the like can be solved; secondly, when the pellets made from the papermaking wastewater are sintered, the cellulose, organic matters and the like are combusted to release gases such as CO2 and the like, so that the interior of the pellets is more porous and loose, and therefore, the pellets with better performance are obtained, the later smelting is facilitated, and the problems that in the prior art, the use amount of a required adhesive is large when the strength requirement of the pellets is met, and the defects that sintering is not facilitated when fine mineral powder is excessively fine, air holes are few, and the air permeability is poor are solved; thirdly, because the invention provides a new scheme for the resource treatment of the papermaking wastewater, the viscosity of cellulose and organic matters in the wastewater can be fully utilized to help the pellet fabrication of the fine ore; the usage amount of the adhesive can be reduced, and the usage amount of common water is saved; can solve the problems of cost increase, water resource shortage and the like caused by large using amount of the adhesive and large using amount of common water.
Therefore, the technical scheme can simultaneously solve a plurality of problems, brings beneficial technical effects of multi-aspect combination, and is beneficial to energy conservation, consumption reduction, emission reduction, environmental protection and economic benefits. Preferably, the content of dissolved and colloidal Substances (SCD) or organic matter in the papermaking wastewater is 3% -10%.
Preferably, the ore powder is iron ore powder and has the following requirements: the granularity is less than 0.044mm (-325 meshes) and should account for 60-85% or the granularity is less than 0.074mm (-200 meshes) and should account for > 90%; the water content is 2.5-4.5%.
Preferably, the binder can be bentonite or slaked lime.
Preferably, the pelletizer adopts a double-roller ball press or a disc pelletizer.
Preferably, the pair of roller ball press machines add pressure load to the ball press disc during pelletizing.
The invention also provides a device for realizing the process, wherein the pelletizer adopts a double-roller ball press, and the double-roller ball press comprises a frame, a first ball press roller, a second ball press roller and a driving mechanism for driving the first ball press roller and the second ball press roller to rotate relatively on the frame; the method is characterized in that: the roller surface of the first ball pressing roller is provided with first ball sockets which are distributed side by side at equal intervals along the axial direction and are uniformly distributed along the circumferential direction; the first ball socket is provided with N rows, and M first ball sockets are distributed on each row along the circumferential direction; the roll surface of the second ball pressing roll is provided with second ball sockets which are distributed side by side at equal intervals along the axial direction and are uniformly distributed along the circumferential direction; the second ball socket is provided with N rows, and M second ball sockets are distributed on each row along the circumferential direction; the roll surface of the first ball pressing roll is provided with M correction ball sockets which are uniformly distributed along the circumferential direction and are distributed in a parallel line with the first ball sockets along the axial direction; the roll surface of the second ball pressing roll is provided with M correction convex balls which are uniformly distributed along the circumferential direction and are distributed in parallel with the second ball socket along the axial direction; and the shape of the correcting ball socket is matched with that of the correcting convex ball, wherein M, N is a positive integer.
Furthermore, two ends of the second ball pressing roller are respectively provided with two convex baffle rings; the two end faces of the first ball pressing roller are respectively in contact fit with the inner side faces of the two convex baffle rings.
Furthermore, the frame comprises two supporting seats which are relatively and fixedly arranged; the two supporting seats are rotatably provided with a driving shaft and a driven shaft, the second ball pressing roller is positioned between the two supporting seats and sleeved on the driving shaft, and the first ball pressing roller is positioned between the two supporting seats and sleeved on the driven shaft; the driving shaft is sleeved with a driving gear, and the driven shaft is sleeved with a driven gear; the driving gear is meshed with the driven gear; the drive mechanism is connected with the driving shaft.
Furthermore, the two supporting seats are symmetrically provided with two sliding chutes; the two sliding chutes are respectively connected with the two sliding seats in a sliding way; the supporting seat is provided with a hydraulic cylinder which can apply pressure towards the first ball pressing roller to at least one sliding seat; the two ends of the driven shaft are respectively and rotatably arranged on the two sliding seats.
Further, the device also comprises a pre-pressing mechanism; the prepressing mechanism comprises a prepressing cylinder, a prepressing screw rod and a prepressing motor, the prepressing cylinder is positioned above the joint of the first ball pressing roller and the second ball pressing roller, and the lower end of the prepressing cylinder is in contact fit with the roller surfaces of the first ball pressing roller and the second ball pressing roller; the pre-pressing motor is used for driving the pre-pressing screw rod to rotate in the pre-pressing barrel.
The invention has the beneficial effects that:
firstly, the process of the invention adopts the papermaking wastewater to replace the common water, only the sewage is required to be mixed according to a specific proportion, the sewage generated by a paper mill can be treated, and the problems of difficult treatment of dissolved and colloidal Substances (SCD) in the papermaking wastewater, high treatment cost and the like can be solved;
secondly, the papermaking wastewater contains dissolved and colloidal Substances (SCD) and can reduce the usage amount of the binder by about 50 percent after being combined with the mineral powder, meanwhile, organic matters in the papermaking wastewater can provide certain heat simultaneously, and CO2 and other gases are discharged when the organic matters are combusted during sintering, so that loose and porous sintered pellets are obtained, multiple combination effects can be realized simultaneously, and energy conservation, consumption reduction, emission reduction, environmental protection and economic benefits are facilitated;
thirdly, the ball press machine can forcibly correct the ball forming position and forcibly return the deviation to zero when the ball is formed by completely matching the correction convex ball and the correction ball socket during ball forming, and can automatically straighten the ball forming position, thereby solving the problem that the prior art has large bidirectional deviation between two ball pressing rollers in the axial direction and the circumferential direction due to large reserved amount and influences the ball forming quality;
fourthly, when the first ball pressing roller and the second ball pressing roller rotate relatively, N first ball pressing rollers of the first ball pressing roller and N second ball pressing rollers of the second ball pressing roller can just form N ball forming cavities when the correction convex ball at the central connecting line of the first ball pressing roller and the second ball pressing roller is completely matched with the correction ball socket, so that N balls can be formed at the same time; the correcting convex ball can perform a forced correcting function when being completely matched with the correcting ball socket, and an automatic deviation correcting effect can be achieved, so that the problem that in the prior art, the first ball pressing roller and the second ball pressing roller have dislocation deviation when forming a ball forming cavity due to the existence of looseness during rotation is solved;
fifthly, the ball press machine of the invention simultaneously reaches the central connecting line of the first ball pressing roller and the second ball pressing roller due to the parallel distribution of the first ball socket, the second ball socket, the correcting convex ball and the correcting ball socket, and N first ball pressing rollers 1 of the first ball pressing roller and N second ball pressing rollers 1 of the second ball pressing roller just form N ball forming cavities which are also positioned on the central connecting line of the first ball pressing roller and the second ball pressing roller so as to achieve the purpose of meeting the requirement of correction and synchronous ball forming in place;
sixth, because the first ball socket, the second ball socket, the correcting convex ball and the correcting ball socket are distributed in the same circumferential direction, are all M, and are distributed in a parallel line manner, the ball can be formed once when the ball is rotated by one M/360 degrees, and the first ball socket, the N second ball sockets, the correcting convex ball and the correcting ball socket can be ensured to be arranged on the central connecting line of the first ball pressing roller and the second ball pressing roller in a parallel line manner when the ball is formed every time, the automatic straightening effect can be achieved when the ball is formed every time, and the consistency of the quality of the ball formed in each row is ensured;
seventhly, two convex baffle rings are respectively arranged at two ends of the second ball pressing roller; two end surfaces of the first ball pressing roller are respectively in contact fit with the inner side surfaces of the two convex baffle rings; the first ball pressing roller and the second ball pressing roller cannot axially displace relative to each other, and the second ball socket of the first ball pressing roller and the second ball pressing roller can simultaneously ensure that when the complete matching center of the correcting convex ball and the correcting ball socket is positioned on the central connecting line of the first ball pressing roller and the second ball pressing roller after the first ball pressing roller and the second ball pressing roller rotate, the first ball socket of the first ball pressing roller and the second ball socket of the second ball pressing roller cannot axially shift when rotating to the central connecting line to form balls, so that no deviation in the axial direction can be ensured, the ball forming quality can be ensured, the relative vibration during rotation can be reduced, and the phenomenon that the balls are loosened or broken by vibration during ball discharging can be avoided.
Drawings
Fig. 1 is a front view of a pair of rolling balls according to the present invention.
Fig. 2 is a perspective view of a pair of rolling balls according to the present invention.
Fig. 3 is a plan view of the first and second ball rollers for forming balls in the present invention.
Fig. 4 is a perspective view of the first and second ball pressing rollers for forming balls in the present invention.
Fig. 5 is a perspective view of the driving and driven shafts assembled to the frame in the present invention.
Fig. 6-7 are perspective views of the driving gear, the driven gear, the driving shaft and the driven shaft, the first ball pressing roller, the second ball pressing roller, the frame and the like in the assembly connection.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
the first embodiment is as follows: a papermaking wastewater recovery treatment process comprises the following raw materials in parts by weight:
90 parts of mineral powder
0.8 part of adhesive
13 portions of papermaking wastewater
The raw materials are subjected to the following steps:
(a) pelletizing the raw materials into pellets by a pelletizer;
(b) and sintering the pellets in a kiln.
In the embodiment, the papermaking wastewater is adopted to replace common water, and only the sewage is mixed according to a specific proportion, so that the sewage generated by a papermaking factory can be treated, and the problems of difficult treatment of dissolved and colloidal Substances (SCD) in the papermaking wastewater, high treatment cost and the like can be solved; meanwhile, the papermaking wastewater contains dissolved and colloidal Substances (SCD) and can reduce the usage amount of the binder after being combined with the mineral powder, meanwhile, organic matters in the papermaking wastewater can provide certain heat, and CO2 and other gases are discharged during the combustion of the organic matters during sintering, so that loose and porous sintered pellets are obtained, multiple combination effects can be realized simultaneously, and the energy-saving, consumption-reducing, emission-reducing, environmental-friendly and economic benefits are facilitated.
In this embodiment, the content of dissolved and colloidal Substances (SCD) or organic substances in the paper-making wastewater is 3% to 10%.
In this example, the ore fines are iron ore fines (magnetite or hematite or a mixture thereof) and have the following requirements: the granularity is less than 0.044mm (-325 meshes) and accounts for 60-85 percent; the water content is 2.5-4.5%.
In this embodiment, bentonite may be used as the binder.
Preferably, the pelletizer adopts a double-roller pelletizing press, and the double-roller pelletizing press increases pressure load to a pelletizing press disc during pelletizing.
Example two: a papermaking wastewater recycling process comprises the following raw materials in parts by weight:
100 portions of mineral powder
1 part of adhesive
15 portions of papermaking wastewater
The raw materials are subjected to the following steps:
(a) pelletizing the raw materials into pellets by a pelletizer;
(b) and sintering the pellets in a kiln.
Wherein, the sintering equipment can be selected from a shaft furnace, a belt type roasting machine and a chain grate type-rotary kiln; the sintering process is divided into five processes of drying, preheating, roasting, soaking and cooling.
And (3) drying: and (2) performing main reaction at 200-600 ℃: evaporating the green ball water; cracking and bursting are to be prevented during the drying process.
Preheating: completely evaporating water at 900-1000 ℃; the main reaction: the magnetite is oxidized into hematite, carbonate decomposition, sulfide and oxidative decomposition and solid phase reaction are carried out;
roasting: 1000-1300 ℃,
roasting iron ore powder in an oxidizing atmosphere at 1000-1100 ℃;
② the hematite is roasted under the oxidizing atmosphere, 1200-1300 ℃;
thirdly, roasting the magnetite powder in a reducing atmosphere at 1200 ℃ and 1300 ℃;
the main reaction: the iron oxide is crystallized and recrystallized, crystal grains grow up to form crystal bridges, solid-phase reaction forms low-melting-point compounds or eutectic crystals to melt, partial liquid phase is formed, the volume is shrunk, and the structure is densified.
Soaking the raw materials: the temperature is slightly lower than the roasting temperature, the temperature is kept for a period of time, crystal grains are further grown, the crystal bridge strength is improved, the pellet structure is homogenized, and the internal stress is eliminated.
And (3) cooling: cooling from 1000-1300 deg.C to a temperature that the conveyor belt can withstand (e.g. below 40 deg.)
In this embodiment, the content of dissolved and colloidal Substances (SCD) or organic substances in the paper-making wastewater is 3% to 10%.
Wherein the mineral powder is iron ore powder and has the following requirements: the particle size of 0.074mm (-200 mesh) should account for > 90%; the water content is 2.5-4.5%.
The adhesive can adopt slaked lime; the pelletizer adopts a double-roller pelletizer.
Example three: a papermaking wastewater recovery treatment process comprises the following raw materials in parts by weight:
110 portions of mineral powder
1.2 parts of adhesive
18 portions of papermaking wastewater
The raw materials are subjected to the following steps:
(a) pelletizing the raw materials into pellets by a pelletizer;
(b) and sintering the pellets in a kiln.
In this embodiment, the content of dissolved and colloidal Substances (SCD) or organic matters in the paper-making wastewater is 3% to 10%. The mineral powder is iron ore powder and has the following requirements: particle size<0.05mm and 70-80 percent; the water content is 2.5-4.5%. Wherein the adhesive can be bentonite (Al) 2 (Si 4 O 10 )(OH) 2 )。
Wherein, the pelletizer adopts a double-roller ball press. When the double-roller ball press machine is adopted for pelletizing, the pressure load is added to the ball press disc.
The paper mill wastewater was supplemented with the following protocol test results and analyzed as follows:
firstly, under the condition that the pressure load of a pelletizer is not increased, papermaking wastewater is adopted to directly replace common water, and qualified pellets can be obtained under the condition that additives are obviously reduced;
secondly, under the condition that the pressure load of the pelletizer is increased, common water is adopted, so that qualified pellets can be obtained under the condition that the using amount of the additive is reduced; meanwhile, under the condition that the pressure load of the pelletizer is increased, the papermaking wastewater is directly used for replacing common water, so that qualified pellets can be obtained under the condition that the using amount of the additive is reduced;
thirdly, after the papermaking wastewater is directly used for replacing common water, the porosity of the sintered pellets is obviously improved, so that more loose and porous sintered pellets can be obtained.
The invention has the following characteristics and analysis:
firstly, in the sintering process of the pellets made of the papermaking wastewater, the cellulose, organic matters and the like are combusted to release gases such as CO2 and the like, so that the interior of the pellets is more porous and loose, and the pellets with better performance are obtained, thereby being beneficial to later smelting.
Secondly, the invention provides a new scheme for the resource treatment of the papermaking wastewater. The viscosity of cellulose and organic matters in the wastewater is fully utilized to help the pellet making of the fine ore; the usage amount of the adhesive can be reduced, and the usage amount of common water is saved.
In addition, in the pellet sintering process, the cellulose and the organic matters are combusted to release heat, so that heat can be provided for sintering the pellets, and the pellet sintering process has the effects of energy conservation and emission reduction.
Example four:
referring to fig. 1-7, a device for realizing a recycling process of papermaking wastewater, a pelletizer adopts a pair of ball press rollers, and comprises a frame 1, a pre-pressing mechanism 5, a first ball press roller 2, a second ball press roller 3 and a driving mechanism 4 for driving the first ball press roller 2 and the second ball press roller 3 to rotate relatively on the frame 1.
3-4, the roll surface of the first ball pressing roll 2 is provided with first ball sockets 2-1 which are distributed side by side at equal intervals along the axial direction and are uniformly distributed along the circumferential direction; the first ball socket 2-1 is provided with N rows, and M first ball sockets are distributed on each row along the circumferential direction.
3-4, the roll surface of the second ball pressing roll 3 is provided with second ball sockets 3-1 which are distributed side by side at equal intervals along the axial direction and are uniformly distributed along the circumferential direction; the second ball socket 3-1 is provided with N rows, and M balls are distributed on each row along the circumferential direction.
Referring to fig. 3-4, in particular, the first socket 2-1 corresponds in position to the second socket 3-1; n balling cavities formed by combining the first ball socket 2-1 and the second ball socket 3-1 are simultaneously arranged at the central connecting line of the first balling roller 2 and the second balling roller 3, so that N pellets can be simultaneously formed.
3-4, the roll surface of the first ball pressing roll 2 is provided with M correction ball sockets 2-2 uniformly distributed along the circumferential direction and is distributed in parallel with the first ball socket 2-1 along the axial direction; the roll surface of the second ball pressing roll 3 is provided with M correction convex balls 3-2 which are uniformly distributed along the circumferential direction and are distributed in parallel with the second ball socket 3-1 along the axial direction; and the shape of the correcting ball socket 2-2 is matched with that of the correcting convex ball 3-2, wherein M, N is a positive integer.
Referring to fig. 3-4, in this embodiment, M is 80 and N is 8.
Referring to fig. 3-4, since the number of the first ball pressing rollers 2-1 and the number of the correction ball sockets 2-2 in each row of the first ball pressing rollers 2 are equal and are M (80), the first ball pressing rollers 2-1 and the correction ball sockets 2-2 in each row are axially in one-to-one correspondence and are distributed in a parallel line (i.e., 80 directions are simultaneously parallel in a parallel line). Since the circumferential number of the second ball pressing rollers 3-1 and the circumferential number of the corrective convex balls 3-2 in each row of the second ball pressing rollers 3 are equal and are M (80), the second ball pressing rollers 3-1 and the corrective convex balls 3-2 in each row are axially in one-to-one correspondence and are distributed in a doubling manner (i.e. 80 directions are simultaneously doubled). When the first ball pressing roller 2 and the second ball pressing roller 3 rotate relatively, when the correction convex ball 3-2 at the central connecting line of the first ball pressing roller 2 and the second ball pressing roller 3 is completely matched with the correction ball socket 2-2, the N first ball pressing rollers 2-1 of the first ball pressing roller 2 and the N second ball pressing rollers 3-1 of the second ball pressing roller 3 can just form N ball forming cavities, so that N balls can be formed at the same time. The correcting convex ball 3-2 and the correcting ball socket 2-2 can play a role of forced correction when being completely matched, so that the effect of automatic deviation correction can be achieved, and the problem that in the prior art, the first ball pressing roller 2 and the second ball pressing roller 3 have dislocation deviation when forming a ball forming cavity due to the existence of looseness during rotation is solved; secondly, as the first ball socket 2-1, the second ball socket 3-1, the correcting convex ball 3-2 and the correcting ball socket 2-2 are distributed in a parallel line manner and simultaneously reach the central connecting line of the first ball pressing roller 2 and the second ball pressing roller 3, N first ball pressing rollers 2-1 of the first ball pressing roller 2 and N second ball pressing rollers 3-1 of the second ball pressing roller 3 can just form N ball forming cavities which are also positioned on the central connecting line of the first ball pressing roller 2 and the second ball pressing roller 3 so as to achieve the purpose of synchronously positioning correction and ball forming; in addition, the first ball socket 2-1, the second ball socket 3-1, the correcting convex ball 3-2 and the correcting ball socket 2-2 are distributed in the same circumferential direction, are all M (80), and are distributed in a parallel line mode, so that the ball can be formed once when the ball is rotated by one M/360 degrees, N first ball sockets 2-1, N second ball sockets 3-1, one correcting convex ball 3-2 and one correcting ball socket 2-2 can be ensured to be arranged on the central connecting line of the first ball pressing roller 2 and the second ball pressing roller 3 in a parallel line mode when the ball is formed, and the automatic straightening effect can be achieved when the ball is formed each time.
The present invention can be combined with fig. 1-4, and in addition, especially, the problem of large bidirectional deviation between the first ball pressing roller 2 and the second ball pressing roller 3 in the axial direction and the circumferential direction is particularly obvious and serious because a large amount of clearance must be reserved when the first ball pressing roller 2 and the second ball pressing roller 3 are adjustably arranged between the centers of the first ball pressing roller 2 and the second ball pressing roller 3 or/and the pressing device is arranged by using a gear train transmission or configuration in the prior art, but the present invention can just forcibly correct the positions of the first ball socket 2-1 and the second ball socket 3-1 by the complete matching of the correction convex ball 3-2 and the correction ball socket 2-2 during the balling and can forcibly zero the deviation during the balling so as to overcome the above problems.
Referring to fig. 3-4, further, two convex baffle rings 3-3 are respectively arranged at two ends of the second ball pressing roller 3; the two end surfaces of the first ball pressing roller 2 are respectively contacted and matched with the inner side surfaces of the two convex baffle rings 3-3. Therefore, the two end faces of the first ball pressing roller 2 are limited by the two convex baffle rings 3-3, the first ball pressing roller 2 and the second ball pressing roller 3 cannot axially move relatively, and the second ball sockets 3-1 of the first ball socket 2-1 and the second ball pressing roller 3 can be ensured to simultaneously ensure that when the complete matching centers of the corrected convex ball 3-2 and the corrected ball socket 2-2 are positioned on the central connecting line of the first ball pressing roller 2 and the second ball pressing roller 3 after the first ball pressing roller 2 and the second ball pressing roller 3 rotate, the first ball socket 2-1 of the first ball pressing roller 2 and the second ball socket 3-1 of the second ball pressing roller 3 cannot axially shift when rotating to the central connecting line to form balls, so that no deviation in the axial direction can be ensured, the ball forming quality is ensured, the relative vibration during rotation is reduced, and the phenomenon that the balls are loosened or broken by vibration during ball discharging is avoided.
5-7, further, the frame 1 includes two supporting seats 1-1 which are relatively fixedly arranged; the two supporting seats 1-1 are rotatably provided with a driving shaft 1-2 and a driven shaft 1-3, the second ball pressing roller 3 is positioned between the two supporting seats 1-1 and sleeved on the driving shaft 1-2, and the first ball pressing roller 2 is positioned between the two supporting seats 1-1 and sleeved on the driven shaft 1-3; the driving shaft 1-2 is sleeved with a driving gear 1-4, and the driven shaft 1-3 is sleeved with a driven gear 1-5; the driving gear 1-4 is meshed with the driven gear 1-5; the driving mechanism 4 is connected with the driving shaft 1-2. The drive mechanism 4 may employ a reduction motor. The speed reducing motor drives the driving shaft 1-2 to rotate, the driving gear 1-4 drives the driven gear 1-5 to rotate, and the driving shaft 1-2 and the driven shaft 1-3 can rotate relatively. Specifically, the driving shaft 1-2 and the driven shaft 1-3 rotate in opposite directions and at the same speed.
Referring to fig. 3-4, in the present embodiment, the first ball pressing roller 2 and the second ball pressing roller 3 have the same outer diameter, and the transmission ratio of the driving gear 1-4 to the driven gear 1-5 is 1.
Referring to fig. 5-7, further, the two supporting seats 1-1 are symmetrically provided with two sliding chutes 1-11; the two sliding chutes 1-11 are respectively connected with the two sliding seats 1-12 in a sliding way; the supporting seat 1-1 is provided with a hydraulic cylinder 6 which can apply pressure towards the direction of the first ball pressing roller 2 to at least one sliding seat 1-12; the two ends of the driven shaft 1-3 are respectively and rotatably arranged on the two sliding seats 1-12. In this embodiment, the two supporting seats 1-1 are respectively provided with a group of hydraulic cylinders 6, the output ends of the two groups of hydraulic cylinders 6 are respectively connected with the two sliding seats 1-1, and the two sliding seats 1-1 are pressed simultaneously, so that the stress balance at the two sides of the first ball pressing roller 2 can be ensured, and the problem of inconsistent ball formation at different axial positions due to single-side pressing can be avoided.
Referring to fig. 5-7, in this embodiment, each group has two hydraulic cylinders 6 and is distributed up and down, so as to ensure the balance of up and down forces.
Referring to fig. 5-7, the driven shafts 1-3 are rotatably mounted at both ends on two carriages 1-12, respectively. The two groups of hydraulic cylinders 6 are respectively arranged on the two supporting seats 1-1, and the output ends of the two groups of hydraulic cylinders 6 are respectively connected with the two sliding seats 1-12. The hydraulic cylinder 6 is a telescopic hydraulic cylinder. Because the two groups of hydraulic cylinders 6 can generate pressure towards the first ball pressing roller 2 for the two sliding seats 1-12, the pressure required by forming is different for different materials, the pressure required by the material which is difficult to form is higher, and the situation that the extruded material is difficult to form can be caused if the pressure is insufficient, and a certain pressure is simultaneously applied to the first ball pressing roller 2 through the hydraulic cylinders 6, so that the requirement of a certain pressure is met during ball forming, and the problem that the forming cannot be realized or the forming is difficult due to insufficient pressure is solved. In addition, because the pressure of the hydraulic cylinder 6 is a fixed value, when the pressure exceeds a set value, the piston rod of the hydraulic cylinder 6 is decompressed according to the working characteristics of the piston rod of the hydraulic cylinder 6, so that the sliding seats 1-12 can automatically move away from the first ball pressing roller 2, and the problems that the pelletizing pressure is too high, the pelletizing is embrittled and burst, the adhesive is extruded, the adhesive effect cannot be achieved, and the demoulding is difficult can be avoided.
As can be seen from fig. 1-3, the pre-pressing mechanism 5 includes a pre-pressing cylinder 5-1, a pre-pressing screw 5-2, and a pre-pressing motor 5-3, the pre-pressing cylinder 5-1 is located above the joint of the first ball pressing roller 2 and the second ball pressing roller 3, and the lower end of the pre-pressing cylinder 5-1 is in contact fit with the roller surfaces of the first ball pressing roller 2 and the second ball pressing roller 3; the pre-pressing motor 5-3 is used for driving the pre-pressing screw rod 5-2 to rotate in the pre-pressing barrel 5-1. Because the prepressing motor 5-3 drives the prepressing screw rod 5-2 to rotate in the prepressing cylinder 5-1, the material is forced to be pressed into the middle of the first ball pressing roller 2 and the second ball pressing roller 3, because the material is prepressed before balling, the forming pressure in the material is increased from small to large, and the forming pressure reaches the maximum value at the central connecting line of the first ball pressing roller 2 and the second ball pressing roller 3, because the material is prepressed, exhausted and forcedly conveyed to the balling positions of the first ball pressing roller 2 and the second ball pressing roller 3, the ball sockets with the same shape and uniformly distributed surfaces can be obtained, and the problem of material shortage is also avoided.
Referring to fig. 1-3, in addition, the invention further comprises a feeding device, the feeding device is provided with a stirring bin 7 and a screw conveyor 8 which are sequentially arranged, a stirrer is arranged in the stirring bin, the screw conveyor is used for conveying the materials stirred in the stirring bin into the prepressing cylinder 5-1, the materials can be uniformly and automatically fed to the prepressing mechanism 5 at a constant speed, the uniformity and the compactness of the materials to be mixed can be improved, and the balling quality is further improved.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. The papermaking wastewater recycling treatment process is characterized by comprising the following raw materials in parts by weight:
90-110 parts of mineral powder
0.8 to 1.2 portions of adhesive
13-18 parts of papermaking wastewater
The raw materials are subjected to the following steps:
(a) pelletizing the raw materials into pellets by a pelletizer;
(b) and sintering the pellets in a kiln.
2. The process for recycling and treating papermaking wastewater according to claim 1, wherein the process comprises the following steps: the content of dissolved and colloidal Substances (SCD) or organic matters in the papermaking wastewater is 3-10%.
3. The process for recycling and treating papermaking wastewater according to claim 1, wherein the process comprises the following steps: the mineral powder is iron ore powder and has the following requirements:
the granularity is less than 0.044mm and is 60-85% or the granularity is less than 0.074mm and is more than 90%;
the water content is 2.5-4.5%.
4. The process for recycling and treating papermaking wastewater according to claim 1 or 2, wherein: the binder can adopt bentonite or slaked lime.
5. The process for recycling and treating papermaking wastewater according to claim 1 or 2, wherein: the pelletizer adopts a double-roller pelletizer or a disc pelletizer.
6. An apparatus for carrying out the process of any one of claims 1 to 5, wherein: the pelletizer adopts a pair-roller ball press, and comprises a frame (1), a first ball press roller (2), a second ball press roller (3) and a driving mechanism (4) for driving the first ball press roller (2) and the second ball press roller (3) to rotate relatively on the frame (1);
the roller surface of the first ball pressing roller (2) is provided with first ball sockets (2-1) which are distributed side by side at equal intervals along the axial direction and are uniformly distributed along the circumferential direction; the first ball socket (2-1) is provided with N rows, and M ball sockets are distributed on each row along the circumferential direction;
the roll surface of the second ball pressing roll (3) is provided with second ball sockets (3-1) which are distributed side by side at equal intervals along the axial direction and are uniformly distributed along the circumferential direction; the second ball socket (3-1) is provided with N rows, and M second ball sockets are distributed on each row along the circumferential direction;
the roll surface of the first ball pressing roll (2) is provided with M correction ball sockets (2-2) which are uniformly distributed along the circumferential direction and are distributed in parallel with the first ball socket (2-1) along the axial direction;
the roll surface of the second ball pressing roll (3) is provided with M correction convex balls (3-2) which are uniformly distributed along the circumferential direction and are distributed in parallel with the second ball socket (3-1) along the axial direction; the shape of the correcting ball socket (2-2) is matched with that of the correcting convex ball (3-2);
wherein M, N are all positive integers.
7. The apparatus of claim 6, wherein: two convex baffle rings (3-3) are respectively arranged at two ends of the second ball pressing roller (3); the two end surfaces of the first ball pressing roller (2) are respectively in contact fit with the inner side surfaces of the two convex baffle rings (3-3).
8. The apparatus of claim 6, wherein: the frame (1) comprises two supporting seats (1-1) which are relatively and fixedly arranged;
the two supporting seats (1-1) are rotatably provided with a driving shaft (1-2) and a driven shaft (1-3), the second ball pressing roller (3) is positioned between the two supporting seats (1-1) and sleeved on the driving shaft (1-2), and the first ball pressing roller (2) is positioned between the two supporting seats (1-1) and sleeved on the driven shaft (1-3);
the driving shaft (1-2) is sleeved with a driving gear (1-4), and the driven shaft (1-3) is sleeved with a driven gear (1-5); the driving gear (1-4) is meshed with the driven gear (1-5); the driving mechanism (4) is connected with the driving shaft (1-2).
9. The apparatus of claim 8, wherein: the two supporting seats (1-1) are symmetrically provided with two sliding chutes (1-11);
the two sliding chutes (1-11) are respectively connected with the two sliding seats (1-12) in a sliding way;
a hydraulic cylinder (6) capable of applying pressure towards the first ball pressing roller (2) to at least one sliding seat (1-12) is arranged on the supporting seat (1-1);
the two ends of the driven shaft (1-3) are respectively and rotatably arranged on the two sliding seats (1-12).
10. The apparatus of any of claims 6-9, wherein: the device also comprises a prepressing mechanism (5); the pre-pressing mechanism (5) comprises a pre-pressing cylinder (5-1), a pre-pressing screw rod (5-2) and a pre-pressing motor (5-3), the pre-pressing cylinder (5-1) is positioned above the joint of the first ball pressing roller (2) and the second ball pressing roller (3), and the lower end of the pre-pressing cylinder (5-1) is in contact fit with the roller surfaces of the first ball pressing roller (2) and the second ball pressing roller (3); the pre-pressing motor (5-3) is used for driving the pre-pressing screw rod (5-2) to rotate in the pre-pressing barrel (5-1).
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| CN202210378536.1A CN114950268A (en) | 2022-04-08 | 2022-04-08 | Papermaking wastewater recycling process and device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210378536.1A CN114950268A (en) | 2022-04-08 | 2022-04-08 | Papermaking wastewater recycling process and device |
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Citations (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1056442A (en) * | 1991-06-12 | 1991-11-27 | 湖南省化学工业设计院 | Spherical granular barium carbonate industrial production method and prilling granulator |
| CN2145194Y (en) * | 1992-09-11 | 1993-11-03 | 唐山工程技术学院 | Cool-pressure ball forming machine for iron-smelting ore concentrate powder |
| JPH05293357A (en) * | 1992-04-15 | 1993-11-09 | Kurimoto Ltd | Dry compression granulating method and equipment therefor |
| JP2005082811A (en) * | 2003-09-04 | 2005-03-31 | Nissei Kogyo Kk | Briquette and briquette manufacturing apparatus |
| CN101186485A (en) * | 2007-12-14 | 2008-05-28 | 重庆大业污泥处理有限公司 | Sewage sludge shale ceramic particle and preparation method thereof |
| JP2009095712A (en) * | 2007-10-15 | 2009-05-07 | Furukawa Industrial Machinery Systems Co Ltd | Device for pelletizing powder, and feed hopper |
| CN101900165A (en) * | 2008-11-20 | 2010-12-01 | 成都利君实业股份有限公司 | Spherical aligning sliding bearing for roll squeezer |
| CN102172544A (en) * | 2011-01-10 | 2011-09-07 | 成都利君实业股份有限公司 | Pressure roller machine |
| RU2457068C1 (en) * | 2011-02-18 | 2012-07-27 | Александр Иванович Литвинцев | Line of continuous direct rolling of powder materials |
| CN202460577U (en) * | 2011-12-20 | 2012-10-03 | 江苏牧羊集团有限公司 | Device for assembling and disassembling pressing roller |
| CN202803198U (en) * | 2012-09-19 | 2013-03-20 | 朱强龙 | Double-roll ball press machine and press roll thereof |
| US20140144073A1 (en) * | 2012-11-27 | 2014-05-29 | Furukawa Industrial Machinery Systems Co., Ltd. | Briquetting machine control device |
| CN204746271U (en) * | 2015-07-22 | 2015-11-11 | 哈尔滨纳诺机械设备有限公司 | Dry process granulator |
| CN205613386U (en) * | 2016-05-06 | 2016-10-05 | 通辽市洪金机械制造有限责任公司 | Pair roller frustum extrusion mould granulation machine |
| CN206105971U (en) * | 2016-10-08 | 2017-04-19 | 苏州铃兰卫生用品有限公司 | Discharge mechanism of cotton piece cutting rim charge |
| CN107244781A (en) * | 2017-06-27 | 2017-10-13 | 安徽比伦生活用纸有限公司 | A kind of processing method of paper waste |
| CN207591806U (en) * | 2017-12-05 | 2018-07-10 | 凉山矿业股份有限公司 | A kind of disk pelletizing machine used in wastewater containing phenol and cyanide processing procedure |
| CN110652935A (en) * | 2019-09-30 | 2020-01-07 | 无锡市金华屹圆科技有限公司 | Double-roller extrusion granulator capable of changing particle shape |
| CN210706202U (en) * | 2019-07-10 | 2020-06-09 | 郑州金利窑炉工程有限公司 | Ball press machine for large-area repairing materials |
| CN211216557U (en) * | 2019-11-27 | 2020-08-11 | 会同县生能科技开发有限公司 | Particle forming device for biological particles of dry-branch sawdust |
| CN211754755U (en) * | 2019-12-27 | 2020-10-27 | 济南赛博生物技术有限公司 | Dry granulation device is used in oxygenation granule production |
| CN212986040U (en) * | 2020-08-31 | 2021-04-16 | 科曼达(天津)机械有限公司 | Roller for sealing |
| CN214636191U (en) * | 2021-01-21 | 2021-11-09 | 江苏三一环境科技有限公司 | Heavy-load self-locking shaft end die roller assembly and granulator |
| CN113650347A (en) * | 2021-08-17 | 2021-11-16 | 河南中州重工科技有限公司 | Ball pressing granulator |
| CN215095877U (en) * | 2021-02-02 | 2021-12-10 | 济源市鑫众联陶瓷科技有限公司 | Full-automatic ball pressing device |
-
2022
- 2022-04-08 CN CN202210378536.1A patent/CN114950268A/en active Pending
Patent Citations (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1056442A (en) * | 1991-06-12 | 1991-11-27 | 湖南省化学工业设计院 | Spherical granular barium carbonate industrial production method and prilling granulator |
| JPH05293357A (en) * | 1992-04-15 | 1993-11-09 | Kurimoto Ltd | Dry compression granulating method and equipment therefor |
| CN2145194Y (en) * | 1992-09-11 | 1993-11-03 | 唐山工程技术学院 | Cool-pressure ball forming machine for iron-smelting ore concentrate powder |
| JP2005082811A (en) * | 2003-09-04 | 2005-03-31 | Nissei Kogyo Kk | Briquette and briquette manufacturing apparatus |
| JP2009095712A (en) * | 2007-10-15 | 2009-05-07 | Furukawa Industrial Machinery Systems Co Ltd | Device for pelletizing powder, and feed hopper |
| CN101186485A (en) * | 2007-12-14 | 2008-05-28 | 重庆大业污泥处理有限公司 | Sewage sludge shale ceramic particle and preparation method thereof |
| CN101900165A (en) * | 2008-11-20 | 2010-12-01 | 成都利君实业股份有限公司 | Spherical aligning sliding bearing for roll squeezer |
| CN102172544A (en) * | 2011-01-10 | 2011-09-07 | 成都利君实业股份有限公司 | Pressure roller machine |
| RU2457068C1 (en) * | 2011-02-18 | 2012-07-27 | Александр Иванович Литвинцев | Line of continuous direct rolling of powder materials |
| CN202460577U (en) * | 2011-12-20 | 2012-10-03 | 江苏牧羊集团有限公司 | Device for assembling and disassembling pressing roller |
| CN202803198U (en) * | 2012-09-19 | 2013-03-20 | 朱强龙 | Double-roll ball press machine and press roll thereof |
| US20140144073A1 (en) * | 2012-11-27 | 2014-05-29 | Furukawa Industrial Machinery Systems Co., Ltd. | Briquetting machine control device |
| CN204746271U (en) * | 2015-07-22 | 2015-11-11 | 哈尔滨纳诺机械设备有限公司 | Dry process granulator |
| CN205613386U (en) * | 2016-05-06 | 2016-10-05 | 通辽市洪金机械制造有限责任公司 | Pair roller frustum extrusion mould granulation machine |
| CN206105971U (en) * | 2016-10-08 | 2017-04-19 | 苏州铃兰卫生用品有限公司 | Discharge mechanism of cotton piece cutting rim charge |
| CN107244781A (en) * | 2017-06-27 | 2017-10-13 | 安徽比伦生活用纸有限公司 | A kind of processing method of paper waste |
| CN207591806U (en) * | 2017-12-05 | 2018-07-10 | 凉山矿业股份有限公司 | A kind of disk pelletizing machine used in wastewater containing phenol and cyanide processing procedure |
| CN210706202U (en) * | 2019-07-10 | 2020-06-09 | 郑州金利窑炉工程有限公司 | Ball press machine for large-area repairing materials |
| CN110652935A (en) * | 2019-09-30 | 2020-01-07 | 无锡市金华屹圆科技有限公司 | Double-roller extrusion granulator capable of changing particle shape |
| CN211216557U (en) * | 2019-11-27 | 2020-08-11 | 会同县生能科技开发有限公司 | Particle forming device for biological particles of dry-branch sawdust |
| CN211754755U (en) * | 2019-12-27 | 2020-10-27 | 济南赛博生物技术有限公司 | Dry granulation device is used in oxygenation granule production |
| CN212986040U (en) * | 2020-08-31 | 2021-04-16 | 科曼达(天津)机械有限公司 | Roller for sealing |
| CN214636191U (en) * | 2021-01-21 | 2021-11-09 | 江苏三一环境科技有限公司 | Heavy-load self-locking shaft end die roller assembly and granulator |
| CN215095877U (en) * | 2021-02-02 | 2021-12-10 | 济源市鑫众联陶瓷科技有限公司 | Full-automatic ball pressing device |
| CN113650347A (en) * | 2021-08-17 | 2021-11-16 | 河南中州重工科技有限公司 | Ball pressing granulator |
Non-Patent Citations (1)
| Title |
|---|
| 赵志成;张玉林;宋昕;: "利用冷压球团制备高品质铁合金原料的工艺简介", 铁合金, no. 05, pages 17 - 19 * |
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