CN109403119B

CN109403119B - Bamboo pulp washing and deslagging equipment

Info

Publication number: CN109403119B
Application number: CN201811642281.5A
Authority: CN
Inventors: 何虹颖
Original assignee: Chongqing Sanhao Paper Industry Co ltd
Current assignee: Chongqing Sanhao Paper Industry Co ltd
Priority date: 2018-12-29
Filing date: 2018-12-29
Publication date: 2020-12-15
Anticipated expiration: 2038-12-29
Also published as: CN109403119A

Abstract

The invention relates to the technical field of papermaking, and particularly discloses bamboo pulp washing and deslagging equipment, which comprises a filter vat, wherein the outer wall of the filter vat is provided with a feed inlet and a discharge outlet; the inner wall of the filter barrel is fixed with a piston cylinder, the outer wall of the filter barrel is fixed with a vortex tube, and the hot gas end of the vortex tube is connected with a hot gas pipe leading to the interior of the filter barrel. According to the scheme, the driving unit is used for driving the screw rod to rotate, so that the filter plate is driven to slide in the filter barrel, preliminary pulp washing of bamboo pulp is realized, and the filter plate is used for removing slag; meanwhile, the bamboo is preheated by hot gas generated by the vortex tube, so that the soaking time is shortened, air in the bamboo is discharged, and the subsequent cooking efficiency is improved.

Description

Bamboo pulp washing and deslagging equipment

Technical Field

The device relates to the technical field of papermaking, in particular to bamboo pulp washing and deslagging equipment.

Background

With the rapid development of national economy, the demand of paper and paper products is increased rapidly, and the raw materials of papermaking wood in China are extremely short; on the other hand, the bamboo resources in China are rich, the pulping and papermaking performances of the bamboo are good, and the environmental pollution is less. Therefore, the method has the advantages that the experts substitute bamboo for wood, pulp and paper are manufactured, the pollution of the pulp and paper to the environment is reduced, the method is a necessary way for solving the shortage of wood pulp in China and promoting the development of paper industry, abundant bamboo resources in China are developed and utilized, and the sustainable development of the paper industry in China is promoted.

In the existing bamboo papermaking process, the papermaking process is generally divided into a pulping section, a papermaking section, a coating section and a processing section, wherein the pulping section mainly comprises the steps of raw material crushing → hot water soaking to form preliminary bamboo pulp → catalyst adding and cooking → spraying and placing pot stirring → filtration equipment solid-liquid separation → washing → bleaching → washing and screening → concentration or pulping and sheet making → storage for later use. During the steps from raw material crushing to fiber separation by cooking, bamboo is crushed and fully soaked to form primary bamboo pulp, and then the primary bamboo pulp is sent to a cooking pot to be cooked and separated from the fiber. The steaming equipment generally adopts a vertical steaming and boiling pot, the vertical steaming and boiling pot is large in size, the volume of the smallest vertical intermittent steaming and boiling pot is 45m3, and the large steaming and boiling pot causes slow heat transfer of primary bamboo pulp in the vertical intermittent steaming and boiling pot and long steaming and boiling time; in actual production, due to the fact that the bamboo wood is compact in structure and the air remained in the guide pipe is extremely difficult to remove, the bamboo wood needs longer permeation time for cooking, the temperature rise permeation time is generally 1.5-2 hours, and the heat preservation time is 2-2.5 hours.

Disclosure of Invention

In order to solve the problems, the invention provides bamboo pulp washing and deslagging equipment which can improve the cooking efficiency of bamboo pulp.

In order to achieve the purpose, the invention adopts the technical scheme that: the bamboo pulp washing and deslagging equipment comprises a filter barrel, wherein the outer wall of the filter barrel is provided with a feed inlet and a discharge outlet, and the inner wall of the filter barrel is connected with a filter plate provided with filter holes in a sliding manner; a driving unit is fixed on the outer wall of the filter barrel, a screw rod is fixed on an output shaft of the driving unit, and the screw rod penetrates through the inner wall of the filter barrel and then is in threaded connection with the filter plate; a piston cylinder is fixed on the inner wall of the filter barrel, a piston plate is connected in the piston cylinder in a sliding manner, and a connecting rod is fixedly connected between the piston plate and the filter plate; the outer wall of the filter barrel is fixed with a vortex tube, and the hot gas end of the vortex tube is connected with a hot gas tube leading to the interior of the filter barrel.

The principle of the invention is as follows: pouring the bamboo wood and the soak solution for soaking the bamboo wood into the filter barrel through the feeding hole, driving the screw rod to rotate forwards and reversely by the driving unit, so that the filter plate in threaded connection with the screw rod slides back and forth in the filter barrel, and stirring the bamboo wood and the soak solution in the filter barrel; when the filter plate slides back and forth, the piston plate is pushed to slide back and forth in the piston cylinder, so that gas in the piston cylinder is continuously pressed into the vortex tube, part of the gas is changed into high-temperature hot gas after flowing through the vortex tube, the temperature of the hot gas generated by the vortex tube can reach 127 ℃, and hot gas discharged from the hot gas end of the vortex tube is discharged into the filter barrel through the hot gas pipe to heat the bamboo wood and the soak solution.

The scheme has the advantages that:

1. the soaking time of the bamboo wood can be reduced: the bamboo materials are deposited at the bottom of the filter barrel in the bamboo material soaking process, the bamboo materials are stacked mutually, so that the contact area between the bamboo materials and the soaking liquid is small, the soaking liquid between the bamboo materials does not flow relatively, the bamboo pulp is not soaked thoroughly, the raw materials which are not soaked thoroughly cannot be quickly cooked to form the bamboo pulp subsequently, the raw materials are wasted, and the cooking time is prolonged. In this scheme, bamboo timber and soak are mixed in the filter vat, and drive unit drive lead screw rotates, drives the filter and makes a round trip to slide in the filter vat, and soak and bamboo timber are constantly stirred, can prevent that the bamboo timber from deposiing in the bottom of filter vat, make the bamboo timber in the filter vat can be soaked completely fast to reduce the waste of raw and other materials and promote soaking efficiency.

2. Can heat automatically: when the filter plate slides back and forth in the filter vat, the filter plate can drive the piston plate to slide back and forth in the piston cylinder through the connecting rod, the piston plate can complete once circular sliding in the piston cylinder, the piston cylinder can complete once compressed gas to the vortex tube, after the compressed gas flows through the vortex tube, the hot gas discharged from the hot gas end of the vortex tube heats the bamboo and the soaking liquid, preheating of the bamboo is realized, because a huge vertical digester is adopted in the primary bamboo pulp cooking process of subsequent cooking, the heat exchange speed in the digester is slow, therefore, the filter vat can reduce the heating time of the subsequent digester, and the cooking efficiency of the digester is improved.

3. Is beneficial to discharging the air in the bamboo and the filter vat: because the temperature of hot air discharged by the vortex tube exceeds 100 ℃, hot air continuously enters the filter barrel, and after the bamboo wood is heated, air in the bamboo wood is heated and expanded to be diffused into the soaking liquid, so that the air in the bamboo wood is discharged, and the soaking of liquid medicine in the subsequent cooking process is facilitated; meanwhile, as the temperature of the soak solution in the filter barrel is continuously increased, the oxygen content of the soak solution is continuously reduced, which is beneficial to discharging the air in the soak solution and enables the air content in the bamboo wood to be reduced to the lowest.

4. Is favorable for the rapid heating in the filter vat: because the stirring effect of filter, heat exchange of soak in the heat pipe exhaust port department heat and the filter vat is accelerated, make the heat of hot gas pipe exhaust steam conduct fast to whole filter vat in, the bamboo timber is by rapid heating in the filter vat to further promote the efficiency of soaking.

Further, the vertical sliding connection of filter in the inner wall of filter vat, the feed inlet is located the top of filter.

The filter barrel is divided into an upper chamber and a lower chamber by the filter plate, the feed inlet is positioned above the filter plate, the bamboo wood and the soak solution enter the filter barrel from the feed inlet, the bamboo wood is stacked at the upper end of the filter plate, and the bamboo wood is immersed by the soak solution. When the filter plate slides back and forth, the soak solution in the upper chamber is constantly exchanged with the soak solution in the lower chamber, so that silt, impurities and the like contained in the bamboo wood in the upper chamber sink into the lower chamber through the filter holes, the separation of the bamboo wood, the silt and the impurities is realized, the silt, the impurities and the like are prevented from entering the subsequent procedures of cooking, pulping and the like, and the machine abrasion in the subsequent precision machining is difficult to clean and accelerate.

Further, the gas outlet of the hot gas pipe is fixed at the bottom end of the filter plate.

Compared with the method that the hot air pipe is randomly fixed in the filter barrel to heat the bamboo wood and the soak solution, the hot air pipe is preferably fixed at the bottom end of the filter plate, and hot air flows out of the air outlet of the hot air pipe and then is diffused upwards from the bottom end of the filter plate; on the other hand, because the hot gas needs the intermittent bottom from the filter upwards diffusion, can prevent that the filtration pore from being blockked up by silt, impurity etc..

Further, the filtering barrel is cylindrical, and the driving unit is fixed at the top of the filtering barrel.

Compare for the polygon in the filter vat cross section, this scheme sets up the filter vat optimization to cylindric, and the ladle body is cylindrically, can die the filter vat under the material of the same quantity, and the filter vat has the biggest volume, and is cylindric ladle wall and can eliminate local stress, makes the ladle body atress even, can bear bigger internal pressure, makes the filter vat can compare the cross section for the volume of polygonal bucket big. The driving unit is fixed at the top end of the filter barrel, so that the installation and the disassembly are convenient; compare in setting up in the ladle body lateral wall, can make the filter have bigger stroke again, make the soaking effect of bamboo timber better, the heating effect is also more obvious.

Furthermore, the lower end of the filter vat is funnel-shaped.

The lower end of the filter barrel is funnel-shaped, so that impurities and silt filtered by the filter plate can be gathered automatically, the impurities and the silt are automatically accumulated at the bottom end of the filter barrel, and uniform treatment is facilitated; meanwhile, the lower end of the filter barrel is funnel-shaped, the lower end of the filter barrel is free of dead angles, silt and impurities are not easy to leave over in the filter barrel, and the filter barrel is convenient to clean.

Furthermore, a drain pipe is arranged at the lower end of the filter barrel, and a valve is arranged on the drain pipe.

The lower end of the filter barrel is provided with a liquid discharge pipe, the liquid discharge pipe is provided with a valve, silt, impurities and the like filtered by the filter plate are gathered at the bottom end of the filter barrel, after the bamboo wood is soaked and preheated by the filter barrel, the valve is opened, so that soak solution, silt, impurities and the like in the filter barrel are quickly discharged out of the filter barrel, and after the soak solution flows out of the filter barrel, the soak solution disappears for the bamboo wood, so that the bamboo wood is taken out from the discharge port conveniently.

Further, the discharge gate is located filter in the filter vat on the lateral wall in filter slip route, and discharge gate department can dismantle be connected with the switch door that the filter vat outer wall arc matches.

When the filter glides downwards to the upper end of the filter and the lower end of the discharge port are level, the filter stops sliding, after the switch door is opened, the soaked bamboo wood can be discharged and collected from the discharge port, and the operation is simple and convenient.

Further, the filter vat is fixed on the support frame.

Utilize the support frame to fix the filter vat, simple structure and firm.

Drawings

FIG. 1 is a top view of a bamboo pulp washing and deslagging device in an embodiment of the invention.

Fig. 2 is a cross-sectional view taken along a-a in fig. 1.

Fig. 3 is a right side view of fig. 1.

Fig. 4 is a cross-sectional view taken along line B-B of fig. 2.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the device comprises a support frame 1, a filter barrel 2, a bidirectional synchronous motor 3, a feed inlet 4, a liquid discharge pipe 5, a valve 6, a discharge outlet 7, a switch door 8, a lock catch 9, a screw rod 10, a filter plate 11, a filter hole 12, a reinforcing rib 13, a piston cylinder 14, a piston plate 15, a connecting rod 16, an upper piston cavity 17, a lower piston cavity 18, a first air pipe 19, a one-way valve 20, a second air pipe 21, a vortex pipe 22 and a hot air pipe 23.

The embodiment is basically as shown in the attached figure 2: the bamboo pulp washing and deslagging device comprises a support frame 1, wherein a vertically arranged filter barrel 2 is fixed on the support frame 1, the upper end of the filter barrel 2 is cylindrical, and the lower end of the filter barrel 2 is funnel-shaped, the top end of the filter barrel 2 is fixedly connected with a driving unit through a bolt, the driving unit is a bidirectional synchronous motor 3, and a feed inlet 4 for feeding bamboo wood and soaking liquid is formed in the top end of the filter barrel 2; a liquid discharge pipe 5 is arranged at the bottom end of the filter barrel 2, and a valve 6 for opening and closing the liquid discharge pipe 5 is fixed on the liquid discharge pipe 5 through a bolt.

As shown in fig. 3, a discharge port 7 is formed in the side wall of the filter barrel 2, an opening and closing door 8 is rotatably connected to the outer wall of the barrel body at the discharge port 7 through a pin, the opening and closing door 8 has an outer shape equal to the radian of the barrel body of the filter barrel 2, and a lock catch 9 which can be locked with the outer wall of the barrel body of the filter barrel 2 is mounted on the opening and closing door 8.

As shown in fig. 2, the output shaft of the bidirectional synchronous motor 3 is vertically downward and coaxially arranged with the filter barrel 2, a vertically arranged screw rod 10 is fixed on the output shaft of the bidirectional synchronous motor 3 through a coupler, a filter plate 11 is fixed on the screw rod 10 through threads, and a filter hole 12 is formed in the filter plate 11. With reference to fig. 4, the inner wall of the filtering barrel 2 is vertically fixed with a reinforcing rib 13, the filtering plate 11 is provided with a sliding chute in sliding fit with the reinforcing rib 13, and when the screw rod 10 rotates, the filtering plate 11 can only vertically slide along the axial direction of the filtering barrel 2 and cannot rotate along with the screw rod 10 due to the limiting effect of the reinforcing rib 13.

As shown in fig. 2, a piston cylinder 14 is coaxially fixed on the inner wall of the top end of the filter barrel 2 and the screw rod 10, a piston plate 15 is vertically connected in the piston cylinder 14 in a sliding manner, a connecting rod 16 is arranged between the piston plate 15 and the filter plate 11, the lower end of the connecting rod 16 is fixed with the filter plate 11 through screws, and the upper end of the connecting rod 16 penetrates through the bottom end of the piston cylinder 14 and then is fixedly connected with the piston plate 15 through screws.

As shown in fig. 2, the piston plate 15 divides the piston cylinder 14 into an upper piston cavity 17 and a lower piston cavity 18, the upper piston cavity 17 and the lower piston cavity 18 are communicated with the atmosphere through a first air pipe 19, and a check valve 20 is arranged at the first air pipe 19 near the upper piston cavity 17, so that air can only flow into the upper piston cavity 17 from the first air pipe 19 near the upper piston cavity 17 but cannot flow into the first air pipe 19 from the upper piston cavity 17; meanwhile, the upper piston cavity 17 is also connected with a second air pipe 21, and the second air pipe 21 is provided with a one-way valve 20, so that air can only flow to the second air pipe 21 from the inside of the upper piston cavity 17 but not flow to the upper piston cavity 17 from the second air pipe 21; referring to fig. 1, the second air pipe 21 penetrates through the upper side wall of the filter vat 2 and is connected with a vortex pipe 22, the hot air end of the vortex pipe 22 is connected with a hot air pipe 23, and an air outlet of the hot air pipe 23 extends downwards along the side wall of the filter vat 2 and then penetrates through the side wall of the filter vat 2 and is fixed at the bottom end of the filter plate 11.

The specific implementation process is as follows:

the bamboo wood and the soak solution are discharged into the filter vat 2 through the feed inlet 4, and the bamboo wood is piled up in the upper end of filter 11, and the soak solution submergence bamboo wood, and the valve 6 that is located the filter vat 2 bottom and the switch door 8 that is located the lateral wall all are in the closed condition, and the filter 11 is located filter vat 2 and leans on lower position.

Starting the bidirectional synchronous motor 3 to rotate forwards, so that the screw rod 10 rotates forwards, the filter plate 11 slides upwards along the inner wall of the filter barrel 2 under the driving of the screw rod 10, and the bamboo on the filter plate 11 moves upwards along with the filter plate 11; meanwhile, the connecting rod 16 fixed to the filter plate 11 pushes the piston plate 15 to slide upward, the gas in the upper piston chamber 17 is compressed into the second gas pipe 21, the second gas pipe 21 guides the compressed gas into the vortex tube 22, and then the hot gas generated from the vortex tube 22 is discharged to the bottom end of the filter plate 11 through the hot gas pipe 23.

When the filter plate 11 moves upwards for a certain distance, the bidirectional synchronous motor 3 rotates reversely to enable the screw rod 10 to rotate reversely, the filter plate 11 slides downwards along the inner wall of the filter barrel 2, and the bamboo falls along with the filter plate 11 under the action of self gravity; meanwhile, the piston plate 15 in the piston cylinder 14 slides downwards under the traction of the connecting rod 16, the first air pipe 19 sucks air from the atmosphere, and the upper piston cavity 17 finishes air suction.

When the filter plate 11 slides downwards to the initial position, the bidirectional synchronous motor 3 rotates forwards again, so that the filter plate 11 slides upwards again. The bidirectional synchronous motor 3 continuously rotates forwards and backwards to enable the filter plate 11 to continuously slide up and down in the filter barrel 2 and continuously stir the bamboo wood and the soak solution in the filter barrel 2 to enable the soak solution to be fully contacted with the bamboo wood; meanwhile, the vortex tube 22 intermittently generates hot gas, the hot gas tube 23 continuously discharges the hot gas to the bottom end of the filter plate 11, and the hot gas heats the bamboo and the soak solution, so that the gas in the bamboo after the temperature of the bamboo is raised is heated and discharged, and the cooking liquid can permeate the bamboo when the bamboo is subsequently cooked, so that the cooking time of the subsequent bamboo is shortened, and the cooking efficiency is improved; and the bamboo timber has accomplished the preheating in filter vat 2, and when the bamboo timber was discharged to subsequent boiling pot, the bamboo timber can be fast heat up to the predetermined temperature to promote bamboo timber and cook efficiency.

At filter 11 continuous upper and lower slip in-process, impurity and silt that the bamboo timber contains etc. are all washd, gather in the lower extreme that filter vat 2 is hourglass hopper-shaped after passing filtration pore 12 by abluent impurity and silt, because hot-air pipe 23 intermittently exhausts to the bottom of filter 11, steam can pass filtration pore 12 when rising in the soak, prevents that silt from blockking up filtration pore 12.

After the bamboo is soaked and preheated in the filter barrel 2, the valve 6 is opened, the soak solution in the filter barrel 2 and silt, impurities and the like at the lower end of the filter barrel 2 are discharged together through the liquid discharge pipe 5, and after the soak solution is discharged, the switch door 8 on the side wall of the filter barrel 2 is opened, and the bamboo is taken out and then sent to the next cooking process.

The foregoing is merely an example of the present invention and common general knowledge in the art of designing and/or characterizing particular aspects and/or features is not described in any greater detail herein. It should be noted that, for those skilled in the art, without departing from the technical solution of the present invention, several variations and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. Bamboo pulp washing deslagging equipment, including the filter vat, it has feed inlet and discharge gate, its characterized in that to open on the outer wall of filter vat: the inner wall of the filter barrel is connected with a filter plate with filter holes in a sliding manner; a driving unit is fixed on the outer wall of the filter barrel, a screw rod is fixed on an output shaft of the driving unit, and the screw rod penetrates through the inner wall of the filter barrel and then is in threaded connection with the filter plate; a piston cylinder is fixed on the inner wall of the filter barrel, a piston plate is connected in the piston cylinder in a sliding mode, and a connecting rod is fixedly connected between the piston plate and the filter plate; a vortex tube is fixed on the outer wall of the filter barrel, and the hot gas end of the vortex tube is connected with a hot gas tube leading to the interior of the filter barrel; the gas outlet of the hot gas pipe is fixed at the bottom end of the filter plate.

2. The bamboo pulp washing and deslagging apparatus of claim 1, wherein: the vertical sliding connection of filter in the inner wall of filter vat, the feed inlet is located the top of filter.

3. The bamboo pulp washing and deslagging apparatus of claim 2, wherein: the filter vat is cylindric, drive unit is fixed in the top of filter vat.

4. The bamboo pulp washing and deslagging apparatus of claim 3, wherein: the lower end of the filter vat is funnel-shaped.

5. The bamboo pulp washing and deslagging apparatus of claim 4, wherein: and a liquid discharge pipe is arranged at the lower end of the filter barrel, and a valve is arranged on the liquid discharge pipe.

6. The bamboo pulp washing and deslagging apparatus of claim 3, wherein: the discharge gate is located the filter vat on the lateral wall in filter sliding path, discharge gate department can dismantle the switch door that is connected with and matches with the filter vat outer wall arc.

7. The bamboo pulp washing and deslagging apparatus of any one of claims 1-6, wherein: the filter vat is fixed on the support frame.