CN108396579B

CN108396579B - Bagasse bio-enzyme continuous pulping equipment

Info

Publication number: CN108396579B
Application number: CN201810399570.0A
Authority: CN
Inventors: 李树泉; 尚玉萍; 李鑫; 李红民
Original assignee: Shanghai Kaichen Industrial Co ltd
Current assignee: Shanghai Kaichen Industrial Co ltd
Priority date: 2018-04-28
Filing date: 2018-04-28
Publication date: 2022-12-30
Anticipated expiration: 2038-04-28
Also published as: CN108396579A

Abstract

The invention belongs to the field of pulping and papermaking, and particularly relates to bagasse bio-enzyme continuous pulping equipment which comprises a long tubular shell and is characterized in that the shell is provided with a feeding section and an extrusion section from left to right, the inner diameter of the feeding section of the shell is larger than that of the extrusion section, a cavity is arranged in the shell wall of the extrusion section of the shell, a facing steam inlet pipe is arranged above the cavity, and a downward steam condensate water discharge pipe is arranged below the cavity. The beneficial effects are that the steam is passed through the hollow cavity of the extrusion section in the shell, the mode of direct heating by the steam in continuous cooking is changed, the quality of the pulp is improved, and the damage to the biological enzyme is reduced. The double-helix structure solves the problems that due to long bagasse fibers, bagasse is adhered to each other, liquor is not uniformly presoaked after entering the bagasse continuous steaming pipe, and the phenomenon of pulp hanging is caused, and solves the problems that the bagasse cannot well move in the continuous steaming pipe and the blanking is not smooth.

Description

Bagasse bio-enzyme continuous pulping equipment

Technical Field

The invention belongs to the field of pulping and papermaking, and particularly relates to bagasse bio-enzyme continuous pulping equipment.

Background

The traditional bagasse pulping process is divided into alkaline pulping and acid pulping. Most of the traditional pulping methods are alkaline pulping, the emission pollution is the well-known key point of environmental protection, and the technical reform has already become a necessary trend along with the enhancement of the global environmental protection consciousness and the development of scientific technology. The biological enzyme pulping method is used for replacing the traditional pulping method or chemical pulping method, solves the problem that the waste water, waste gas and waste residue seriously pollute the environment in the production process, and is the subject of active research and exploration in various countries in the world for a long time. The biological enzyme has an active enzyme system capable of degrading lignin and denatured lignin, can convert organic chloride in the bleaching wastewater into inorganic chloride and carbon dioxide, destroys chromophoric group tissues and structures, and reduces total organic chloride, B0D, C D and chromaticity in the bleaching wastewater. The biological enzyme can degrade lignin in the wastewater, can degrade xenobiotics in the wastewater, reduces the pollution of the papermaking wastewater to the environment, and has high application value.

At present, no existing continuous pulping equipment is available for biological enzyme pulping, an existing alkaline pulping continuous cooking system is mostly adopted, bagasse is conveyed from prepared materials to enter a continuous cooking pipe, if steam is introduced into the continuous cooking pipe, biological enzymes lose activity due to high temperature because of overhigh steam temperature (generally the steam temperature is more than 100 ℃), the biological enzymes are killed due to the fact that the optimal reaction activation temperature of the biological enzymes is 60-80 ℃, the biological enzymes cannot act in the pulping process, and pulping failure is caused, so that the continuous cooking pipe needs to be insulated and heated. Secondly, bagasse enters a continuous steaming pipe, bagasse fibers are long, the bagasse is adhered to each other, liquid medicine is pre-soaked unevenly after the bagasse enters the continuous steaming pipe, and the bagasse is hung in the continuous steaming pipe along with poor reaction, namely, the bagasse cannot move well in the continuous steaming pipe, which is a phenomenon of unsmooth blanking. Directly influences the feeding of the spiral to the next equipment, and the spiral in the continuous steaming pipe easily influences the blanking because the degradation effect of bagasse bio-enzyme is not good and the bagasse is easy to block the spiral in the continuous steaming pipe, and once the spiral is blocked, the spiral is very troublesome to process and cannot realize continuous production.

Disclosure of Invention

The invention aims to provide bagasse bio-enzyme continuous pulping equipment which ensures the activity of bio-enzyme and reduces the pulp hanging in a continuous steaming pipe.

The invention is realized by the following technical scheme:

a bagasse bio-enzyme continuous pulping device comprises a long tubular shell, and is characterized in that the shell is provided with a feeding section and an extrusion section from left to right, the inner diameter of the feeding section of the shell is larger than that of the extrusion section, a cavity is arranged in the shell wall of the extrusion section of the shell, a facing steam inlet pipe is arranged above the cavity, and a downward steam condensate water discharge pipe is arranged below the cavity; a first screw and a second screw are transversely arranged in the shell, a first variable frequency motor connected with the left end of the first screw and a second variable frequency motor connected with the left end of the second screw are fixedly arranged on the outer side of the left end of the shell, and the diameters of threads of the first screw and the second screw at the extrusion section are larger than that of the threads of the feeding section;

the upper side of the left end of the shell feeding section is communicated with a feeding bin, and the lower side of the right end of the shell extrusion section is communicated with a discharge hole. By the design, the mode of directly heating steam in continuous cooking is changed by the steam in the cavity of the extrusion section of the shell, the quality of pulp is improved, and the damage to biological enzymes is reduced. The double-helix structure solves the problems that due to long bagasse fibers, bagasse is adhered to each other, liquid medicine is not uniformly presoaked after entering the bagasse continuous steaming pipe, and the phenomenon of pulp hanging is caused, and solves the problems that the bagasse cannot well move in the continuous steaming pipe and the blanking is not smooth.

Furthermore, the first screw rod and the second screw rod are the same, the left ends of the parts of the first screw rod and the second screw rod, which are positioned in the feeding section, are right opposite to the feeding port of the feeding bin, a partition plate is arranged between the first screw rod and the second screw rod, and the length of the parts of the first screw rod and the second screw rod, which are positioned in the feeding section, is 10-20% of the length of the screw rods; the ratio of the pitch of the first screw and the second screw in the extrusion section to the pitch of the feeding section is 1:2-1. By the design, the screw is divided into a feeding section with a larger screw pitch and an extruding section with a smaller screw pitch, and the feeding section with the larger screw pitch is not easy to block and is easy to feed; and the screw pitch on the extrusion section is designed to be smaller, so that the space of the extrusion section is smaller relative to that of the feeding section, the bagasse can form rubbing in the extrusion section with the smaller space, the stress generated during rotation is increased, and the fiber rubbing performance of the pulping section is improved.

Further, install the agitator in the feeding storehouse, the agitator is in the top of feed inlet, the agitator includes the (mixing) shaft, evenly is fixed with on the (mixing) shaft and moves the claw tooth, feeding storehouse outside fixed mounting has third inverter motor, third inverter motor connects the (mixing) shaft. So design, the agitator stirs thick liquids, can not block up feed inlet again, and third inverter motor controls stirring speed simultaneously.

Furthermore, the shell is of an upper and lower split type structure, and the upper and lower split type shells are fastened and connected through bolts. So design, the installation debugging of being convenient for prevents to block up, is convenient for change the accessory.

Furthermore, be equipped with the powder feeding pipe that runs through inside on the section of extruding of casing, the casing is equipped with the temperature monitor that detects the inside thick liquids temperature of demonstration and detects the pressure display that shows inside thick liquids pressure on extruding the section. By the design, the temperature and the pressure in the shell can be conveniently observed, and the operation is adjusted.

Compared with the prior art, the invention has the following beneficial effects: the cavity of the extrusion section of the shell is filled with steam, so that the direct heating mode of the steam in continuous cooking is changed, the quality of pulp is improved, and the damage to biological enzymes is reduced. The double-helix structure solves the problems that due to long bagasse fibers, bagasse is adhered to each other, liquor is not uniformly presoaked after entering the bagasse continuous steaming pipe, and the phenomenon of pulp hanging is caused, and solves the problems that the bagasse cannot well move in the continuous steaming pipe and the blanking is not smooth. The screw is divided into a feeding section with a larger screw pitch and an extruding section with a smaller screw pitch, and the feeding section with the larger screw pitch is not easy to block and simultaneously enables feeding to be easy; and the screw pitch on the extrusion section is designed to be smaller, so that the space of the extrusion section is smaller relative to that of the feeding section, the bagasse can form rubbing in the extrusion section with smaller space, the stress generated during rotation is increased, and the fiber rubbing performance of the pulping section is improved. The invention is convenient for installation and debugging, prevents blockage, is convenient for replacing accessories, and can adjust the variable frequency motor to change the working state according to the temperature and pressure conditions.

Description of the drawings

FIG. 1 is a schematic structural diagram of bagasse bio-enzyme continuous pulping equipment according to the present invention;

FIG. 2 is a schematic left-side view of the bagasse bio-enzyme continuous pulping apparatus according to the present invention;

FIG. 3 is a schematic top view of the bagasse bio-enzyme continuous pulping apparatus of the present invention;

FIG. 4 is a schematic view of the combined structure of the bagasse bio-enzyme continuous pulping apparatus according to the present invention;

in the figure: 1. the device comprises a shell, 2, a cavity, 21, an air inlet pipe, 22, a discharge pipe, 3, a first screw rod, 31, a first variable frequency motor, 4, a second screw rod, 41, a second variable frequency motor, 5, a feeding bin, 51, a stirring shaft, 52, moving claw teeth, 6, a discharge hole, 7, a dosing pipe, 8, a temperature display, 9 and a pressure display.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

1-3, the bagasse bio-enzyme continuous pulping equipment comprises a long tubular casing 1, for conveniently transporting the casing with the length of 10m, wherein the casing 1 is provided with a feeding section with the length of 1.5m and an extruding section with the length of 8.5m from left to right, the inner diameter of the feeding section of the casing 1 is 2.5m, and the inner diameter of the extruding section is 2m, so that the bagasse cannot be jammed in the feeding section; a first screw rod 3 and a second screw rod 4 are transversely installed in the shell 1, the first screw rod 3 and the second screw rod 4 are identical, a partition plate with the height of 1.2m is welded at the bottom of the shell between the first screw rod and the second screw rod, and bagasse at the bottoms of the two screw rods is prevented from being mixed to influence the pulping effect. The length of the parts of the first screw 3 and the second screw 4 positioned in the feeding section is 15 percent of the length of the screws; the ratio of the screw pitch of the first screw 3 and the second screw 4 in the extrusion section to the screw pitch of the feeding section is 1:2, the thread diameter of the feeding section is 2.3m, and the thread diameter of the extrusion section is 1.8m. Both ends of the first screw rod 3 and the second screw rod 4 are connected through a rotary bearing fixed inside the shell, an L-shaped fixing plate frame is welded on the outer side of the left end of the shell 1, a first variable frequency motor 31 and a second variable frequency motor 41 are connected to the L-shaped fixing plate frame in a threaded mode, the output shaft of the first variable frequency motor is connected with the left end of the first screw rod 3 through a connecting shaft, and the output shaft of the second variable frequency motor is connected with the left end of the second screw rod 4 through a connecting shaft. The upper side of the left end of the feeding section of the shell 1 is communicated with a feeding bin 5, a feeding hole of the feeding bin faces the feeding sections of the first screw and the second screw, and a biological enzyme dosing pipe and a water feeding pipe are arranged at the upper part in the feeding bin, so that the dosing quantity and the bagasse material concentration can be controlled. The lower side of the right end of the extrusion section of the shell 1 is communicated with a discharge hole 6.

In order to prevent bagasse materials from entering the shell body in the feeding bin and blocking, a stirrer is arranged in the feeding bin 5, the stirrer is arranged above the feeding hole, the stirrer comprises a transverse stirring shaft 51, and moving claw teeth 52 are uniformly fixed on the stirring shaft 51. One end of the stirring shaft is connected with an output shaft of a third variable frequency motor through a coupler. The feeding speed of the feeding bin is controlled by adjusting the rotating speed of the third variable frequency motor, so that blockage is prevented. In order to conveniently detach and maintain the blocked part, the shell 1 is of an upper-lower split type structure, the upper-lower split type shell is fastened and connected through bolts, and a sealing rubber gasket is installed at the splicing part. The sealed cavity 2 is reserved with three through holes penetrating the inside of the shell 1, the first through hole is provided with a dosing pipe 7 for adding auxiliary medicines, the second through hole is provided with a temperature display 8 for detecting and displaying the temperature of the inside slurry, the specific model is an electronic thermometer purchased in the market, the temperature value is displayed in a real-time detection chamber through a temperature probe extending into the inside of the shell, the third through hole is provided with a pressure display 9 for detecting and displaying the pressure of the inside slurry, and the specific model is a pipeline insertion type pressure transmitter sensor with digital display.

In order to fully realize biological enzyme pulping, when bagasse biological enzyme is continuously pulped, as shown in fig. 4, the pulping equipment is required to be combined from top to bottom as pulping units and fixed into a whole by a fixing frame, a discharge port of a first pulping unit is communicated with a feeding bin of a next pulping unit to be combined to form a continuous pulping production line, in the present case, four pulping units of ABCD are combined from top to bottom, bagasse raw materials required for production are loaded into a pulping unit A, the reaction time of the raw materials in the pulping unit A is determined according to the decomposition condition of bagasse by biological enzyme, the discharge time can be generally adjusted to be 30-60 minutes, and the raw materials are discharged from the discharge port and then sent to a pulping unit B for reaction time of 30-60 minutes; the reaction time of the slurry discharged from the discharge port of the pulping unit B and fed into the pulping unit C is 30-60 minutes, the reaction time of the slurry discharged from the discharge port of the pulping unit C and fed into the pulping unit D is 30-60 minutes, the slurry discharged from the pulping unit D is fed into the next process for use, the total reaction time of A-B-C-D is 120-200 minutes, and the biological enzyme pulping reaction time is completely met; and continuously charging new bagasse into the pulping unit A with discharged materials emptied at each time, discharging bagasse bio-enzyme paper pulp with lignin fully decomposed by bio-enzyme at each time, feeding the discharged bagasse bio-enzyme paper pulp into the next production process for use, and circulating all the time to prolong the retention time, so as to ensure that the bio-enzyme fully decomposes the lignin, and fully decompose the added bagasse with decomposition such as bagasse and straw to obtain qualified paper pulp. The above-mentioned biological enzyme may be replaced with other fungi which can decompose lignin arbitrarily.

The specific operation process is as follows

Bagasse for pulping to be degraded by biological enzyme and a liquid biological enzyme catalyst containing the biological enzyme are added into a feeding bin, steam is introduced into an air inlet pipe of a cavity of a shell, the temperature is raised by heating so that the environmental temperature in the shell of the pulping unit is kept at 60-85 ℃, a first variable frequency motor and a second variable frequency motor are started to drive screw shafts of a first screw rod and a second screw rod to rotate, the biological enzyme is fully contacted with the bagasse to be degraded by the screw shafts, and the decomposition time is shortened. In the reaction process, the temperature in the shell is kept at 60-85 ℃, and the relative pressure is kept between 0 and 0.5 MPa. When the temperature display displays that the temperature exceeds 85 ℃, the staff adjusts and reduces the amount of steam entering the inner cavity, so that the temperature is temporarily balanced; when more bagasse is in the shell, the pressure display displays that the pressure exceeds 0.5MPa, and the staff adjusts the rotating speed of the first variable frequency motor and the second variable frequency motor, so that the rotating speed is reduced, the bagasse flowing amount is reduced, and the pressure is reduced.

The pulping continuous cooking system overcomes the problems of uneven discharging, poor temperature control, easy blockage and the like, and greatly improves the yield. Compared with the bagasse moving and liquid medicine permeation in the traditional continuous cooking system, the bagasse passes through the system of the invention, and the obstruction degree is smaller. The bagasse well reacts in the novel reactor, the liquid medicine uniformly permeates, the bagasse moves smoothly, and the moving problem in the bagasse pulping process is well solved. The novel equipment of the invention is more simplified.

Claims

1. A bagasse bio-enzyme continuous pulping device comprises a long tubular shell (1), and is characterized in that the shell (1) is provided with a feeding section and an extrusion section from left to right, the inner diameter of the feeding section of the shell (1) is larger than that of the extrusion section, a cavity (2) is arranged in the shell wall of the extrusion section of the shell (1), an upward steam inlet pipe (21) is arranged above the cavity (2), and a downward steam condensate water outlet pipe (22) is arranged below the cavity (2); a first screw (3) and a second screw (4) are transversely arranged in the shell (1), a first variable frequency motor (31) connected with the left end of the first screw (3) and a second variable frequency motor (41) connected with the left end of the second screw (4) are fixedly arranged on the outer side of the left end of the shell (1), and the diameters of the threads of the first screw (3) and the second screw (4) positioned at the extrusion section are larger than that of the threads of the feeding section;

the upper side of the left end of the feeding section of the shell (1) is communicated with a feeding bin (5), and the lower side of the right end of the extrusion section of the shell (1) is communicated with a discharging hole (6);

the first screw (3) and the second screw (4) are the same, the left ends of the parts, located on the feeding section, of the first screw (3) and the second screw (4) are opposite to the feeding hole of the feeding bin, a partition plate is arranged between the first screw (3) and the second screw (4), and the length of the parts, located on the feeding section, of the first screw (3) and the second screw (4) is 10-20% of the total length of the screws; the ratio of the screw pitch of the first screw (3) and the second screw (4) in the extrusion section to the screw pitch of the feeding section is 1:2-1.5;

install the agitator in feeding storehouse (5), the agitator is in the top of feed inlet, the agitator includes (mixing) shaft (51), evenly is fixed with on (mixing) shaft (51) and moves claw tooth (52).

2. A bagasse bio-enzyme continuous pulping apparatus according to claim 1, characterized in that the casing (1) is a split-type structure, the split-type casing being fastened and connected by bolts.

3. The bagasse bio-enzyme continuous pulping apparatus according to claim 1, wherein the extrusion section of the casing (1) is provided with a chemical feeding pipe (7) penetrating to the inside, and the casing (1) is provided with a temperature display (8) for detecting and displaying the temperature of the internal pulp and a pressure display (9) for detecting and displaying the pressure of the internal pulp on the extrusion section.