TWI685476B - Pulp sludge reproduction-based light-weight pellet material, preparation method and manufacturing system thereof - Google Patents

Abstract

Provided is a pulp sludge reproduction-based light-weight pellet material, a preparation method and manufacturing system thereof. The method for manufacturing a pulp sludge reproduction-based light-weight pellet material of the invention comprises mixing a raw material consisting of a pulp sludge, an additive containing silicon aluminate and the like in a certain measurement ratio, and then adding water to be granulated into a green pellet ball in a half-dry state, and further fired it into a light-weight pellet material through a thermal processing in a rotary kiln. Because of utilizing the rotary kiln apparatus system and molten sintering curing process in the present invention, an organic substance of the pulp sludge can be decomposed to form pores stably existed in glass-solidfied material, then it is made to form a light-weight pellet material, which has fine pores in entire inner and is able to be used in construction engineering projects.

Description

Pulp and paper pollution 泥 recycled light 粒料, its manufacturing method, and its manufacturing system

The present invention relates to a pulp-paper stain 泥remanufactured lightweight 粒料, a manufacturing method thereof, and a manufacturing system thereof, in particular to a manufacturing method capable of recycling pulp-paper stain 泥 into light-weight pellets, which can The pulp and paper pollution of papermaking should be properly treated, and light-weight materials with high economic value can be prepared.

Paper pulp sludge (paper pulp sludge) is the main waste generated in the papermaking process, which is the waste water generated in the pulp manufacturing process after the sewage (settlement) and dehydration (dehydration) 泥. The main components of the pulp and paper stains after the treatment are short wood fibers and tiny stains 泥. At present, there are existing methods of pollutant disposal site, including incineration site and landfill site. Because the incineration site only pollutes the atmosphere and consumes a lot of energy, the pulp and paper pollution of domestic paper mills is another way of landfill disposal, but the landfill disposal site is increasingly lacking, resulting in increasing disposal costs, market acceptance, and effective disposal of paper pulp泥 The renewable resource technology needs to be developed urgently. The Environmental Protection Agency has declared pulp and paper pollution as reusable general business waste. At present, there are a small number of pulp and paper pollution in China that are developed and applied to compound fertilizers, but the actual application is only small.

Although China is currently promoting the application of recycled paper, in the process of waste paper recycling, about 1/4不 can be recycled, mainly because the shortened lignin fiber can be used for papermaking. The main difficulty in the reuse of pulp and paper pollution is the excessive energy consumption of the drying, crushing and homogenization procedures in the process.

The dry base high calorific value of pulp and paper pollution is about 1/3 of the calorific value of coal, coal, coal or charcoal. Although it belongs to the pollution of lower calorific value and waste, it still has the potential to be used alone or as a mixture for auxiliary combustion.

In the content of pulp and paper pollution, the harmful substances include solid heavy genus. However, the commonly used methods, incineration method (lower temperature 度, <900℃) and burying method cannot effectively stabilize it. At present, it is considered that the sintering and curing method is better.

The sintering and curing method is to mix the pulp and paper stains to be treated with the aluminosilicate component, and then sinter them at a high temperature of 1050 to 1250 degrees Celsius to form organic matter in the pulp and paper stains. Thermal decomposition, combustion and gasification, and inorganic substances sinter to form a glassy solid. In addition to providing calorific value and low fuel consumption, the organic matter in the pulp and paper pollution is also the main reason why the remaining pores after thermal decomposition are made into light weight and light weight.

In view of the pulp and paper pollution, the methods commonly used in China at present are incineration and burial. The mechanism, disadvantages and limitations to be used are briefly described below.

The incineration method is a hot place 理 method, which can greatly reduce the volume, but the ashes after incineration still need to be 理 or buried; the burial is a matter 理 method, which occupies the volume, and the moisture contained in it will be 流.

Both of these methods are simple to operate, and are currently common methods for handling paper pulp and paper dirt. The disadvantage of the incineration method is air pollution and huge energy consumption. The burial rule is to obtain 不易 from the site, and the cost of the site will gradually increase, and it will cause pollution to the groundwater resources.

In summary, the pulp and paper pollution generated in the papermaking process, the traditionally used incineration method and landfill method, without the resources and sustainable reuse value, there are certain limitations.

In view of this, the purpose of the present invention is to provide a "manufacturing method of pulp and paper fouling" resource recycling light weight" by sintering and solidification. It is mainly made of papermaking pulp and paper pollution 泥 through homogenization, blending, preparation, heat treatment, screening and grading, etc., to make it lightweight for construction materials 料 application. Compared with the incineration method and the burying method, the sintering and solidification method, in addition to the proper disposal of 理pulp and paper pollution 泥, the resulting cured product is lightweight 粒料 can also be large 量 used in the construction of 料. Compared with the incineration method and the burying method, the sintering and solidification method, in addition to the proper disposal of 理pulp and paper pollution 泥, the resulting cured product is lightweight 粒料 can also be large 量 used in the construction of 料.

The present invention is to provide a method for making pulp and paper pollution, resource and light weight, and to make it light, that is, to use pulp and paper pollution and raw materials containing aluminosilicate additives, to mix and add water according to a fixed ratio of 例 and to prepare it to be semi-dried The basic 狀 state of life 料 ball, and then through the hot place 理 procedure, burned into light 粒料 in the rotary kiln. The present invention uses rotary kiln system equipment to decompose and form organic matter in pulp and paper stains by means of sintering and solidification and form pores to settle in glassy solidified matter, and make it into small pores throughout, which can be applied to Lightweight construction project 粒料.

In order to achieve the above purpose, the manufacturing method of the pulp-paper sludge remanufacturing lightweight 粒料 includes the following steps: master batch mixture preparation step: putting the dried pulp-paper sludge and additives into a mixing unit, and then adding water Mix to form a masterbatch mixture with a moisture content in the range of 15% to 35%; granulation step: put the masterbatch mixture into a granulation unit to make a raw material ball with a particle size distribution of 5 to 20 mm; and burn Production step: The raw material ball is transported to the firing unit for low-temperature stage firing and high-temperature stage firing in order to obtain light-weight pellets. The pulp pressure 泥remanufactured light 粒料 has a cylinder compression strength less than or equal to 3Mpa, and the particle density is in the range of 0.3~1.8g/cm ³ respectively.

According to an embodiment of the present invention, the weight ratio of the pulp and paper sludge to the additive is not particularly limited, for example, it is preferably in the range of 5 wt%: 95 wt% to 25 wt%: 75 wt%. Moreover, the weight ratio of the pulp and paper sludge to the additive is in the range of 5wt%: 95wt%~30wt%: 70wt%; more preferably, it is in the range of 5wt%: 95wt%~32.5wt%: 67.5wt% ; The best is in the range of 5wt%: 95wt% ~ 35wt%: 65wt%.

In addition, according to one technical idea of the present invention, substances suitable for use as additives include at least aluminosilicates, aluminosilicate-containing crystals, aluminosilicate precursors, alkali metal oxides, and raw materials thereof For example, reservoir sludge, water purification sludge, stone processing sludge, clay, fly ash, hearthstone powder, river sludge, kaolin, granite powder, brick powder, marble powder or a combination of these. According to an embodiment of the present invention, the additive is preferably a substance containing at least aluminosilicate. For example, for example, the additive may be selected from reservoir silt, harbor silt, stone processing sewage, clay, and At least one of the combinations.

According to an embodiment of the present invention, the conditions of the low-temperature firing are: the temperature is raised from the first temperature (T1) to the second temperature (T2) in a first predetermined time interval (t1), and the rotation speed is between 1~ The range of 6rpm; the conditions of the high-temperature firing are: the temperature is raised from the third temperature (T3) to the fourth temperature (T4) in the second predetermined time interval (t2), and the rotation speed is in the range of 1~3rpm. In addition, according to an embodiment of the present invention, firing in the low temperature stage further includes holding at the second temperature (T2) for X minutes; and firing in the high temperature stage further includes maintaining at the fourth temperature (T4) for Y minute. Moreover, X, and Y are not particularly limited, and the two may be the same or different; for example, X, and Y may be in the range of 5 to 30, preferably 5 to 28 The better range is 5 to 25, and the best range is 5 to 22. Furthermore, t1, t2, T1, T2, T3, and T4 meet the following relationship: 15 min≦t1≦60 min, 25 min≦t2≦50 min, and 0.6≦t1/t2≦2.4; 40℃≦T1≦700℃, 40℃≦T2≦700℃, and T1≦T2; 600℃≦T3≦1250℃, 600℃≦T4≦1250℃, and T3≦T4.

According to an embodiment of the present invention, the first predetermined time interval (t1) and the second predetermined time interval (t2) may be the same or different, and are not particularly limited. For example, for example, the lower limit of t1 is preferably 15 minutes or more, more preferably 16 minutes or more, and the best is 17 minutes or more; on the other hand, the lower limit of t2 is preferably 25 minutes or more, more The best is 26 minutes or more, and the best is 27 minutes or more.

Secondly, according to an embodiment of the present invention, the upper limit of the first predetermined time interval (t1) is preferably 60 minutes or less, more preferably 59 minutes or less, and most preferably 58 minutes or less; on the other hand, The upper limit of the second predetermined time interval (t2) is preferably 50 minutes or less, more preferably 49 minutes or less, and most preferably 48 minutes or less.

Furthermore, according to an embodiment of the present invention, the first predetermined time interval (t1) and the second predetermined time interval (t2) are not particularly limited. For example, for example, the first predetermined time interval (t1) and the second predetermined time interval (t2) should preferably satisfy the relationship of 0.6≦t1/t2≦2.4, preferably 0.6≦t1/t2≦2.35 The relational expression is more preferably a relational expression satisfying 0.6≦t1/t2≦2.30, and the best is a relational expression satisfying 0.6≦t1/t2≦2.25.

According to an embodiment of the present invention, the first temperature (T1) and the second temperature (T2) in the low temperature stage are not particularly limited, and the two may be the same or different. For example, for example, the first temperature (T1) is preferably in the range of 40°C to 700°C, preferably in the range of 40°C to 690°C, more preferably in the range of 40°C to 680°C, and most The preferred range is 40°C to 670°C. On the other hand, the second temperature (T2) is preferably in the range of 40°C to 700°C, preferably in the range of 40°C to 690°C, more preferably in the range of 40°C to 680°C, most preferably It is in the range of 40°C to 670°C. In addition, the temperature difference between the first temperature (T1) and the second temperature (T2) is not particularly limited. For example, for example, the value of (T2-T1) may be above 50°C, preferably 100 ℃, the better is above 150 ℃, the best is above 200 ℃.

According to an embodiment of the present invention, the third temperature (T3) and the fourth temperature (T4) in the high temperature stage are not particularly limited, and the two may be the same or different. For example, for example, the third temperature (T3) is preferably in the range of 600°C to 1250°C, preferably in the range of 600°C to 1240°C, more preferably in the range of 600°C to 1230°C, most preferably The range is 600°C to 1220°C. On the other hand, the fourth temperature (T4) is preferably in the range of 600°C to 1250°C, preferably in the range of 600°C to 1240°C, more preferably in the range of 600°C to 1230°C, and most preferably In the range of 600 ℃ to 1220 ℃. In addition, the temperature difference between the third temperature (T3) and the fourth temperature (T4) is not particularly limited. For example, for example, the value of (T4-T3) may be above 50°C, preferably 100 ℃, the better is above 150 ℃, the best is above 200 ℃.

According to an embodiment of the present invention, it is preferred that the water-containing portion of the masterbatch mixture contains the following components: silicon dioxide 45~56wt%, aluminum oxide 18~22wt%, and ferric oxide 6~ 7wt%, calcium oxide 6-14wt%, magnesium oxide greater than 1wt%, sodium oxide greater than 1wt%, potassium oxide greater than 1wt%, organic matter greater than 5wt%, the above ratio 例 is the weight of each component in the mixture 不 不 water content 量.

According to an embodiment of the present invention, the pulp and paper sludge and the additives are powders with a median diameter D ₅₀ ≦30 microns (μm), respectively.

According to an embodiment of the invention, the masterbatch mixture further contains the dust recovered in the firing step.

In addition, the present invention can also provide a system for manufacturing pulp and paper sludge to regenerate light weight materials, which at least comprises: a grinding unit for grinding dried pulp and paper sludge and/or additives into powder; mixing A unit, which is provided at the downstream end of the grinding unit, is used to mix the pulp sludge, the additive, and water to form a masterbatch mixture; a granulation unit is provided at the downstream end of the mixing unit , Used to receive the masterbatch mixture from the mixing unit and granulate to form a raw material ball; and a firing unit, which at least includes a double-tube rotary kiln and a monitoring device.

According to an embodiment of the present invention, the double-tube rotary kiln is formed by a drying preheating kiln and a roasting kiln connected in series, and the drying preheating kiln and the roasting kiln are independently set for temperature regulation Mechanism and speed adjustment mechanism; the feed inlet of the drying and preheating kiln is provided at the downstream end of the granulation unit to receive the raw material body from the granulation unit and perform low-temperature firing; the roasting kiln receives The raw material pellets from the drying and preheating kiln are fired at a high temperature stage to obtain light pellets.

According to an embodiment of the present invention, the monitoring device is electrically connected to the temperature adjustment mechanisms and the rotation speed adjustment mechanisms to detect and control the temperature and rotation speed in the drying preheating kiln and the roasting kiln .

According to an embodiment of the present invention, the double-cylinder rotary kiln is further provided with an angle adjustment mechanism, and the angle adjustment mechanism is electrically connected to the monitoring device to adjust the inclination angle of the double-cylinder rotary kiln.

According to an embodiment of the present invention, the drying preheating kiln and the roasting kiln are respectively provided with gas regulating mechanisms, and the gas regulating mechanisms are electrically connected to the monitoring device to detect and adjust the drying preheating The gas composition ratio in the kiln and the roasting kiln.

The specific effects that can be achieved by the present invention include:

1. In the present invention, the aluminosilicate-containing additive is added to the pulp and paper sludge, and then burned in a rotary kiln to light weight through the heat treatment 理 procedure, and the aluminosilicate-containing additive generates foaming gas at high temperature. The pulp and paper sludge is made with small pores throughout, which can be used in the construction of light weight 粒料, which greatly improves the economic value of the pulp and paper sludge at the 了 place理.

2. The present invention is a rotary kiln system equipment, which uses the sintering and solidification method to settle the pulp and paper sludge in the glassy solidified material formed by melting and sintering, and the obtained light weight can be safely applied to construction projects.

In the following, different specific embodiments are listed and described in detail for the implementation of the present invention, so as to make the spirit and content of the present invention more complete and easy to understand; however, those with ordinary knowledge in this skill should understand The present invention is of course not limited to these examples, and other identical or equal functions and sequence of steps can be used to achieve the invention.

In this document, the meanings of the scientific and technical words used herein are the same as those understood and used by those with ordinary knowledge in the technical field to which the present invention belongs. In addition, without conflicting with the context, the singular noun used in this specification covers the plural form of the noun; and the plural noun used also covers the singular form of the noun.

In this article, the values and parameters used to define the scope of the present invention inevitably contain the standard deviation due to individual test methods, so most of them are expressed by approximate numerical values, but in specific embodiments Relevant values presented as accurately as possible. In this article, "about" generally depends on the consideration of those with ordinary knowledge in the technical field to which the present invention belongs, and generally means that the actual value falls within the acceptable standard error of the average value, for example, the actual value is Within ±10%, ±5%, ±1%, or ±0.5% of a specific value or range.

In the embodiment of the present invention, the pulp and paper sludge and the aluminosilicate-containing additive are used as the raw materials of the light-weight granule material: the aluminosilicate-containing additive has fluxing, foaming and viscosity increasing Effects, such as reservoir silt, harbor silt, stone processing dirt, clay, etc.;

Please 參As shown in FIG. 1, the preferred implementation of the present invention includes the following steps:

Masterbatch mixture preparation step S1: Put the dried pulp and paper sludge and additives into a mixing unit, and then add water to mix to form a masterbatch mixture with a moisture content ranging from 15% to 35%.

Granulation step S2: The master batch mixture is put into a granulation unit to make a raw material ball with a particle size distribution of 5-20 mm.

Firing step: The raw material ball is transported to the firing unit for low-temperature stage firing and high-temperature stage firing in order to obtain light-weight pellets.

According to another embodiment of the present invention, before the masterbatch mixture preparation step S1, it may further include a raw material pretreatment step P1: drying the pulp, paper sludge and additives (here mainly reservoir silt) Up to constant weight, it is preferred that the pulp, paper sludge and additives are separately transported to the dryer through a scraper for drying, and the dryer temperature 度 is between 95 and 105°C. Then, the pulp, paper sludge and additives are crushed into blocks; preferably, 利 is crushed into blocks with a jaw crusher. The crushed pulp, paper sludge and additives are finely ground into powder, and stored in their respective 料 silos; preferably the grinding step is 利 finely ground to a median value with a ball mill 粒 diameter D ₅₀ ≦30 microns (μm ) Powder.

Through the above raw material pretreatment step P1 of drying, crushing and grinding, etc., the original 料 is made into a homogeneous powder, which can be uniformly mixed in the subsequent master batch mixture preparation step S1 to ensure It can produce light weight with stable quality and excellent performance.

In the preparation step S1 of the masterbatch mixture, the milled pulp, paper sludge and additives are taken according to the appropriate ratio 例Count 量, and then mixed with water to form a mixture with water content 率 between 15% and 25% 料 to make the mixture 料The aqueous part (namely, the mixed solid of pulp and paper sludge and additives) can have a specific preferred chemical composition, which is obtained by mixing the ground pulp and paper sludge with additives and water to form a masterbatch mixture. The dust recovered in the subsequent high-temperature firing process; the principles of the above formula design, according to the chemical composition contained in the pulp and paper sludge and additives used, are adjusted to the appropriate ratio of the chemical composition required by each formula 例, as shown in the table 1 shows:

Table 1 Use raw materials Pulp and paper sludge + additives + dust recovered by dust collector Composition (wt%) SiO ₂ 45~56 Al ₂ O ₃ 18~22 Fe ₂ O ₃ 6~7 CaO 6~14 MgO ＞1 Na ₂ O ＞1 K ₂ O ＞1 Organic matter ＞5 Loss on ignition (@750℃) ＞5

The mixing and blending procedure is based on the formula shown in Table 1. It is calculated with the electronic scale attached to the conveyor belt, and then mixed with water through a twin shaft mixer until it is homogenized, to be prepared.

Next, in the granulation step S2, the masterbatch mixture is made into 連continuously graded 5mm~20mm round balls 狀raw料balls; preferably, the masterbatch mixture after the completion of mixing is transported by a conveyor belt To manufacture 粒 machine into  production 粒, the production 粒 method adopts wet balling method to avoid dust flying, 落 heavy and environmentally friendly clean production.

In the firing step S3, the raw 料 balls are transported to the rotary kiln to be fired to make light 粒料, the highest 爐 internal temperature 度 used for firing is between 1050~1250℃, which can be different according to the same formula, And according to the pre-set firing curve into 行 firing. The firing unit may be a rotary kiln, and the exhaust gas discharge of the rotary kiln must pass through the air pollution prevention equipment to be dust collected 理, so that it meets the national air pollution prevention and control standards, and the dust is recovered by dust collection It can also be used 利 for the production of lightweight 粒料, mixed with pulp and paper sludge and additives in the preparation step of the masterbatch mixture to achieve the “garbage 零 waste” 理念 promoted by the Environmental Protection Agency.

Furthermore, the raw material ball is sequentially fired at a low temperature stage and a high temperature stage in the firing unit. The conditions for the low-temperature stage firing are: raising the temperature from the first temperature (T1) to the second temperature (T2) in the first predetermined time interval (t1), and the rotation speed is in the range of 1 to 6 rpm; the high-temperature stage firing The conditions for the control are: the temperature is raised from the third temperature (T3) to the fourth temperature (T4) in the first predetermined time interval (t2), and the rotation speed is in the range of 1~3rpm; and T1, T2, T3, T4 Meet the following relationship: 15 min≦t1≦60 min, 25 min≦t2≦50 min, and 0.6≦t1/t2≦2.4; 40℃≦T1≦700℃, 40℃≦T2≦700℃, and T1≦T2; 600℃≦T3≦1250℃, 600℃≦T4≦1250℃, and T3≦T4.

In addition, in another embodiment of the present invention, after the firing step S3, it further includes a 冷Step S4: fired light weight 粒料 to be annealed; the light weight is preferred 粒料 system 利冷The machine is annealed according to the preset 降 temperature curve. In addition, after the cooling step S5, it may further include a screening and grading step S6: light weight obtained after 冷粒, according to its unit weight 量 and particle diameter 粒粒, etc., into 行 points 類 and stored, light 粒料 before leaving the factory, They must also meet national standards such as CNS before they are shipped out of the factory.

Corresponding to the above manufacturing method of pulp and paper sludge 泥reworked light weight 粒料, the invention also provides a manufacturing system of pulp and paper sludge reprocessed light weight material, which includes a drying unit 1, a grinding unit 2, a mixing unit Mixing unit 3, granulation unit 4, firing unit 5, drying unit 1 is used to dry pulp and paper sludge, and the pulp and paper sludge and additives (mainly reservoir silt 泥 here) are dried to constant It is preferred that the pulp, paper sludge and additives are transported to the dryer through a scraper to dry, the temperature of the dryer is between 95~105℃.

The grinding unit 2 receives the dried pulp and paper sludge and grinds the pulp and paper sludge. The grinding unit 2 includes a crushing unit 21 and a grinding unit 22. The crushing unit 21 is used to stain the dried pulp and paper The sludge and additives are crushed into blocks separately. In this embodiment, the crushing unit 21 may be a jaw crusher, and the grinding unit 22 is used to finely grind the crushed pulp, paper sludge and additives into powder, and store them separately. In the silo to which it belongs, in this embodiment, the grinding unit 22 may be a ball mill, which finely grinds the crushed mixture into a powder with a median diameter D ₅₀ ≦30 microns (μm). Through the above homogenization treatment steps such as drying, crushing and grinding, the raw materials are made into homogeneous powders, which can be uniformly mixed in the subsequent master batch mixture preparation step to ensure that stable quality can be produced And light-weight materials with excellent performance

Mixing unit 3, used to mix pulp and paper sludge and additives to form a masterbatch mixture, according to the appropriate ratio 例 calculation 量 take the pulp and paper sludge and additives after grinding, and then add water to mix to form water content 率Mixture between 15%~25%料.

The granulation unit 4 is provided at the downstream end of the mixing unit 3 and is used to receive the masterbatch mixture from the mixing unit 3 and granulate to form a green body. The mixture 料 is made into 連 grading 5mm~20mm round balls 狀 raw 料 balls; the better is to mix the mixture after completion 料 and transport it to the manufacturing machine by conveyor belt to make the machine to make the system and make the moisture The ball formation method can avoid the dust flying.

The firing unit 5 includes at least a double-tube rotary kiln 51 and a monitoring device 52. The double-barrel rotary kiln 51 is formed by connecting the drying preheating kiln 511 and the roasting kiln 512 in series, and the drying preheating kiln 511 and the roasting kiln 512 are independently provided with a temperature adjusting mechanism and a rotating speed adjusting mechanism. The feed inlet of the drying and preheating kiln 511 is provided at the downstream end of the granulation unit 4 for receiving the raw material body from the granulation unit 4 and firing at a low temperature stage. The roasting kiln 512 receives the raw material pellets from the drying and preheating kiln 511 and burns them at a high temperature stage, thereby obtaining light pellets. The monitoring device 52 is electrically connected to the temperature adjustment mechanisms and the rotation speed adjustment mechanisms to detect and control the temperature and rotation speed in the drying preheating kiln 511 and the roasting kiln 512.

The double-cylinder rotary kiln 51 may be further provided with an angle adjustment mechanism, which is electrically connected to the monitoring device to adjust the inclination angle of the double-cylinder rotary kiln.

In addition, the drying and preheating kiln 511 and the roasting kiln 512 can be respectively provided with gas regulating mechanisms, which are electrically connected to the monitoring device 52 to detect and adjust the gas in the drying and preheating kiln 511 and the roasting kiln 512 Composition ratio.

The double-barrel rotary kiln 51 applicable to the present invention further includes a temperature sensor and an angle sensor. The temperature sensor senses the temperature of the drying preheating kiln 511 and the roasting kiln 512 and transmits it to the monitoring device 52, similarly , The angle sensor detects the rotation angle of the drying preheating kiln 511 and the roasting kiln 512 and transmits it to the monitoring device 52. The monitoring device 52 controls the heater of the double-tube rotary kiln 51 according to the set temperature curve and the detected temperature The heating temperature of the monitoring device 52 further includes a control panel. The control panel is provided with a plurality of control buttons and numerical input buttons to set the temperature curve and the predetermined rotation angle. The control panel is also provided with a display device for displaying The temperature and angle of the drying preheating kiln 511 and the roasting kiln 512. In addition, the monitoring device 52 further includes a wireless transceiver unit, which can be connected to a remote controller or a portable device via a wireless network, and an operation interface can be installed on the remote controller or the portable device, and the user can remotely Use a remote control or a portable device to send control signals to the monitoring device 52, and monitor the status of the double-tube rotary kiln 51.

The light-weight pellets after firing are transported to the cooling unit 6, and the cooling unit 6 is provided at the downstream end of the firing unit 5 for cooling the light-weight pellets, and the light-weight pellets after being fired are cooled and annealed, preferably The light-weight pellets are cooled and annealed according to a pre-set chill curve using a cooler.

The cooled light-weight pellets are transported to a screening unit 7 and sorted and stored according to their unit weight and particle size.

In addition, the pulp and paper sludge remanufacturing system of the present invention further includes a system information control center 8, which is connected to the mixing unit 1, filter press unit 2, drying unit 3, granulation Unit 4, firing unit 5, cooling unit 6, and screening unit 7, and the system information control center 8 is connected to a cloud database 9 through a network, mixing unit 1, filter unit 2, drying unit 3, manufacturing The manufacturing parameters of the pellet unit 4, the firing unit 5, the cooling unit 6, and the screening unit 7 can be sent to the system information control center 8, and the system information control center 8 can send control signals to the mixing unit 1, filter press unit 2, The drying unit 3, the granulation unit 4, the firing unit 5, the cooling unit 6, and the screening unit 7. The cloud database 9 can analyze the data of each unit and provide the system information control center 8 with the best control mode.

In the following, the specific examples are used to explain the manufacturing method of the pulp and paper sludge recycled light-weight pellets of the present invention, and the properties such as water absorption rate, particle density and strength are analyzed. "Example 1-2"

In Examples 1 and 2, the pulp and paper sludge and additives (in this example, reservoir sludge) were dried, crushed, and pulverized in the ratios shown in Table 2 below, then added with fresh water and mixed A master batch mixture is obtained, and the moisture content in the master batch mixture is between 15% and 25%.

The master batch mixture is transported to a disc granulator by a conveyor belt for granulation, and a continuous gradation of 5-15 mm lumpy raw material balls is made.

Then, the raw material pellets were put into a double-tube rotary kiln at a temperature, temperature rise time, and rotation speed as shown in Table 2 to perform low-temperature stage firing and high-temperature stage firing in order to obtain light pellets M1 and M2.

After cooling and annealing the light-weight pellets M1 and M2, product physical properties were analyzed, and the obtained results are recorded in Table 2.

Table 2 Example 1 Example 2 Lightweight materials M1 M2 Raw material ratio Pulp and paper sludge (wt%) 5~10 10~25 Reservoir silt (wt%) 90~95 75~90 Moisture content of masterbatch mixture (%) 15~25 15~25 Raw material average particle size (mm) 5~15 5~15 Low temperature firing The first temperature (℃) 60 60 Second temperature (℃) 650 650 Heating time (min) 25~40 30~50 Speed (rpm) 2~4 1~3 High-temperature firing The third temperature (℃) 650 650 Fourth temperature (℃) 1200 1100 Time(min) 25~45 30~45 Speed (rpm) 1~2 1~2 Product properties Loose unit weight (kg/m ³ ) 550~900 400~650 Average particle size (mm) 5~18 5~18 Particle density (g/cm ³ ) 0.9~1.8 0.7~1.4 Water absorption rate (%) 15~20 18~25 Cylinder pressure strength (Mpa) ＜3 ＜3

It can be seen from the results in Table 2 that the loose unit weights of the light-weight pellets M1 and M2 prepared in Example 1 and Example 2 of the present invention are 550-900 kg/m ³ and 400-650 kg/m ³ , respectively. The particle density is 0.9~1.8 g/cm ³ , and 0.7~1.4 g/cm ³ , the water absorption rate is 15~20%, and 18~25%, and the cylinder pressure strength is less than 3Mpa, suitable for non-structural engineering Use of materials or filter materials.

The preferred implementation of the present invention is to mix pulp, paper sludge, aluminosilicate-containing additives and other raw materials, according to the ratio of 量, to mix it to contain specific chemical components, and to add water to make it into a semi-dry basis 狀 state of life 料 ball , And then burned into light weight with rotary kiln through the hot place 理 procedure. Due to the preferred implementation of the present invention, the rotary kiln system equipment is used to stabilize the pulp and paper sludge in the glassy solidified material formed by melt sintering by means of melt sintering solidification, and then through the addition of aluminosilicate additives. The foaming gas is generated at high temperature, and the pulp and paper sludge is made to have small pores throughout, which can be applied to the construction project of light weight 粒料.

In summary, the preferred implementation of the present invention 例 is in addition to 了 can effectively stabilize the 理 pulp and paper sludge, and its light weight 粒料 can also obtain rich economic effects 益, which is important for the country’s livelihood, construction and environmental protection. Full positive meaning. However, the above implementations, which are shown in the description, drawings and tables, are one of the preferred implementations of the present invention例, not to limit the present invention in this way, so that they are similar to the structures, devices, features, etc. of the present invention, 雷, Should be within the scope of the purpose and application of the invention.

P1, S1~S5‧‧‧Step 1‧‧‧ drying unit 2‧‧‧Grinding unit 3‧‧‧Mixing unit 4‧‧‧Pelletizing unit 5‧‧‧ Firing unit 6‧‧‧cooling unit 7‧‧‧ Screening unit 8‧‧‧System Information Control Center 9‧‧‧ Cloud database 21‧‧‧Crushing unit 22‧‧‧Pulverizing unit 51‧‧‧Double cylinder rotary kiln 52‧‧‧Monitoring device 511‧‧‧ drying and preheating kiln 512‧‧‧Roaster

FIG. 1 is a flow chart showing an embodiment of a manufacturing method of pulp-paper stain 泥reworked light 粒料 of the present invention. FIG. 2 is a block diagram showing an embodiment of a manufacturing system of pulp and paper sludge recycled light weight material according to the present invention.

P1, S1~S5‧‧‧Step

Claims (10)

A manufacturing method of pulp-paper stain 泥 recycled light 粒料, which includes: Preparation of masterbatch mixture: Put the dried pulp and paper sludge and additives into a mixing unit, and then add water to mix to form a masterbatch mixture with a moisture content in the range of 15% to 35%; Granulation step: the masterbatch mixture is put into a granulation unit to make a raw material ball with a particle size distribution of 5-20 mm; and Firing step: The raw material ball is transported to the firing unit for low-temperature stage firing and high-temperature stage firing in order to obtain light-weight pellets; The weight ratio of the pulp and paper sludge to the additive is in the range of 5wt%: 95wt%~25wt%: 75wt%; The additive contains at least aluminosilicate; The conditions of the low-temperature firing are: the temperature is raised from the first temperature (T1) to the second temperature (T2) in the first predetermined time interval (t1); The conditions for the high-temperature firing are: raising the temperature from the third temperature (T3) to the fourth temperature (T4) in the second predetermined time interval (t2); and t1, t2, T1, T2, T3, T4 respectively meet the following relationship: 15 min≦t1≦60 min, 25 min≦t2≦50 min, and 0.6≦t1/t2≦2.4; 40℃≦T1≦700℃, 40℃≦T2≦700℃, and T1≦T2; 600℃≦T3≦1250℃, 600℃≦T4≦1250℃, and T3≦T4. The manufacturing method of pulp and paper pollution 泥reworked light 粒料 as described in claim 1, wherein the 不water-containing part of the masterbatch mixture contains the following components: silicon dioxide 45~56wt%, aluminum oxide 18~ 22wt%, ferric oxide 6-7wt%, calcium oxide 6-14wt%, magnesium oxide greater than 1wt%, sodium oxide greater than 1wt%, potassium oxide greater than 1wt%, organic matter greater than 5wt%, the above ratio 例 is that each component accounts for this The weight of the water content of the masterbatch mixture is 量%. The method for producing pulp paper pollution 泥reworked light weight 粒料 as described in claim 1, wherein the additive is at least one selected from reservoir silt, harbor silt, stone processing dirt, clay, and combinations thereof. The manufacturing method of pulp-paper sludge 泥reworked lightweight 粒料 described in claim 1, wherein the pulp-paper sludge and additives are powders with a median value 粒 diameter D ₅₀ ≦30 microns (μm). The manufacturing method of pulp-paper stain 泥reworked light 粒料 described in claim 1, wherein the masterbatch mixture further contains the dust recovered in the firing step. The manufacturing method of pulp-paper stain 泥remanufactured light 粒料 as described in claim 1, wherein the light-weight particle material is used for non-structural engineering or filter materials. A manufacturing system for pulp and paper pollution 泥 recycled light 粒料, which includes at least: Grinding unit for grinding dry pulp, paper sludge and/or additives into powder; A mixing unit, which is provided at the downstream end of the grinding unit, is used to mix the pulp, paper sludge, the additive, and water to form a masterbatch mixture; A granulation unit, which is provided at the downstream end of the mixing unit, for receiving the masterbatch mixture from the mixing unit and granulating to form a green pellet; and The firing unit, which contains at least a double-tube rotary kiln and a monitoring device; The double-cylinder rotary kiln is composed of a drying preheating kiln and a roasting kiln connected in series, and the drying preheating kiln and the roasting kiln are independently provided with a temperature adjusting mechanism and a rotating speed adjusting mechanism; The feed inlet of the intervention heat kiln is provided at the downstream end of the granulation unit to receive the raw material body from the granulation unit and perform low-temperature firing; the roasting kiln receives the raw material from the drying preheat kiln Raw material pellets are fired at high temperature to obtain light pellets; The monitoring device is electrically connected to the temperature adjustment mechanisms and the rotation speed adjustment mechanisms to detect and control the temperature and rotation speed in the drying preheating kiln and the roasting kiln. The manufacturing system for pulp and paper pollution 泥remanufactured light weight 粒料 described in claim 7, wherein the double-cylinder rotary kiln is further provided with an angle adjustment mechanism, which is electrically connected to the monitoring device to adjust the double The inclination angle of the drum rotary kiln, and the drying preheating kiln and the roasting kiln are respectively provided with gas regulating mechanisms. The gas regulating mechanisms are electrically connected to the monitoring device to detect and adjust the drying preheating The gas composition ratio of the kiln and the roasting kiln. A pulp-paper stain 泥 remanufactured lightweight 粒料, produced by using the manufacturing method as in any one of claims 1 to 6, or using the manufacturing system as in any one of claims 7 to 8, characterized in that: Pulp and paper pollution 泥 Remanufactured light 粒料 The cylinder compression strength is less than or equal to 3MPa. For example, the pulp and paper pollution 泥 remanufactured light weight 粒料 of item 9, wherein the particle density of the pulp and paper turbulent paper reworked light weight 粒料 is 0.3~1.8g/cm ^{3 respectively} .

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