CN113136735B

CN113136735B - Environment-friendly chlorine-free paper pulp bleaching equipment

Info

Publication number: CN113136735B
Application number: CN202110440001.8A
Authority: CN
Inventors: 吴乐
Original assignee: Huanggang Chenming Pulp Paper Co ltd
Current assignee: Huanggang Chenming Pulp Paper Co ltd
Priority date: 2021-04-23
Filing date: 2021-04-23
Publication date: 2022-11-25
Anticipated expiration: 2041-04-23
Also published as: CN113136735A

Abstract

The invention discloses an environment-friendly chlorine-free paper pulp bleaching device which comprises a plurality of tank bodies, wherein the lower ends of the tank bodies are fixedly connected with a supporting frame, the lower ends of the tank bodies are conical, the upper ends and the lower ends of the tank bodies are respectively communicated with a discharge pipeline, the inner wall of each tank body is provided with a spiral blade, one side of each tank body is communicated with a feed pipeline, and the feed pipelines are arranged in a tangent mode with the tank bodies. The invention relates to the technical field of paper pulp manufacturing equipment, wherein a tank body is matched with a stirring and separating mechanism, after raw materials are injected into the tank body from a feeding pipe, a driving motor is used for driving a stirring pipe to rotate in the forward direction, bleaching agents in the stirring pipe are mixed into the raw materials, and meanwhile, the stirring pipe is used for stirring and mixing the raw materials and the bleaching agents, so that the bleaching agents and the raw materials are mixed more uniformly, and the bleaching effect is improved.

Description

Environment-friendly chlorine-free paper pulp bleaching equipment

Technical Field

The invention relates to the technical field of paper pulp manufacturing equipment, in particular to environment-friendly chlorine-free paper pulp bleaching equipment.

Background

The bleaching process of bleaching paper pulp with chlorine and hypochlorite as bleaching agent is developed in the last 30 century, and the bleaching waste water of paper pulp bleached by this process contains great amount of organic chloride with strong toxicity, especially dioxin (Dioxan) with strong carcinogenicity and mutagenicity, and the traditional biochemical treatment can not decompose the toxic organic chloride completely. Chlorination with chlorine since 1830 as the first stage of kraft bleaching almost all bleaching processes for producing high brightness pulps began with two stages of chlorination and alkaline extraction, since the combined process using C and E is the most economical and efficient method for bleaching alkaline pulps, and in recent years, new methods of modified kraft cooking, elemental chlorine-free (ECF) and total chlorine-free (TCF) bleaching aimed at deep delignification appeared in the middle and later stages of the 80 th 20 th century.

In the prior art, a special bleaching device is usually needed to bleach pulp in the process, a pulp bleaching tower which is used conventionally directly adopts a pulp input port and a bleaching agent input port, and two pipelines are mixed with each other to obtain bleached pulp.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides environment-friendly chlorine-free pulp bleaching equipment.

In order to achieve the purpose, the invention adopts the following technical scheme:

an environment-friendly chlorine-free pulp bleaching apparatus comprising:

the lower end of each tank body is fixedly connected with a support frame, the lower end of each tank body is conical, the upper end and the lower end of each tank body are communicated with discharge pipelines, spiral blades are arranged on the inner wall of each tank body, a feeding pipeline is communicated with one side of each tank body, and the feeding pipelines are arranged in a tangent mode with the tank bodies;

the stirring and separating mechanism is matched with the tank body and comprises a support, the support is fixedly connected with the upper end of the tank body, a driving motor is fixedly connected to the upper end of the support, a stirring pipe is fixedly connected to the output end of the driving motor, a bleaching agent adding mechanism is arranged on the side wall of the stirring pipe, the stirring pipe is located in the tank body, a plurality of round holes which are arranged in a surrounding mode are formed in the side wall of the stirring pipe, a connecting pipe is connected to the round holes in a rotating mode, a stirring blade is fixedly connected to one end, far away from the stirring pipe, of the connecting pipe, a liquid injection groove communicated with the connecting pipe is formed in the stirring blade, a sinking groove is formed in the side wall, close to the liquid injection groove, of the stirring blade, a sealing plate is connected to the sinking groove in a rotating mode, a yielding groove is formed in the outer side wall of the stirring pipe, and a plurality of limiting blocks are fixedly connected to the yielding groove;

temperature control assembly, temperature control assembly includes temperature controller, the temperature controller sets up with the lateral wall fixed connection of the jar body, temperature controller electric connection has the PTC heating plate, the lateral wall that the notes cistern was kept away from to the stirring leaf is seted up flutedly, and the PTC heating plate is located the recess and sets up.

Preferably, the bleaching agent adds the mechanism and includes the liquid storage pot, the lower extreme intercommunication of liquid storage pot has the metering valve, and the one end intercommunication of metering valve has the liquid feeding pipe, the lateral wall of stirring pipe has been seted up and has been annotated the liquid mouth, and the stirring pipe is close to the lateral wall rotation cover of annotating the liquid mouth and be equipped with the casing, casing and liquid feeding pipe intercommunication setting.

Preferably, the upper end fixedly connected with hopper of the jar body, and the hopper with be located jar body upper end ejection of compact pipeline intercommunication setting, one side intercommunication of hopper has the unloading pipe of slope setting.

Preferably, the stirring pipe penetrates through a discharge pipeline positioned at the upper end of the tank body, and the bleaching agent adding mechanism is positioned above the discharge pipeline.

Preferably, the stirring leaf is fan-shaped, the lateral wall that the stirring leaf is close to the stirring pipe has seted up the spout, and sliding connection has the closing plate in the spout, the inner wall of closing plate and spout is interference fit.

Preferably, a discharge pipeline positioned at the lower end of the tank body is communicated with a stop valve.

Preferably, the lateral wall of the tank body is wrapped by the heat-insulating layer, an observation window is arranged on one side of the tank body, and double-layer laminated glass is embedded in the observation window.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, the tank body is matched with the stirring and separating mechanism, after the raw materials are injected into the tank body from the feeding pipe, the stirring pipe is driven by the driving motor to rotate forward, the bleaching agent in the stirring pipe is mixed into the raw materials, and meanwhile, the raw materials and the bleaching agent are stirred and mixed by the stirring pipe, so that the bleaching agent and the raw materials are mixed more uniformly, and the bleaching effect is improved;

2. according to the invention, through arranging the tank body matched with the stirring and separating mechanism, after the raw material is mixed with the bleaching agent and reacts, the driving motor is used for driving the stirring pipe to rotate reversely, at the moment, the stirring blades rotate and form a spiral shape, and matched with the spiral blades on the inner wall of the tank body, at the moment, heavy objects in the raw material are thrown to the inner wall of the tank body under the action of centrifugal force and move downwards under the driving of the spiral blades, and light objects move towards the middle and move upwards under the driving of the stirring pipe and the stirring blades, so that the separation of the heavy objects and the light objects in the raw material is realized.

3. According to the invention, by arranging the temperature control assembly and utilizing the PTC heating sheet on the stirring blade, the temperature in the tank body can be monitored more efficiently, the temperature can be increased rapidly according to actual requirements, and the temperature control effect and speed are improved, so that the bleaching quality is further ensured, and the bleaching effect is improved.

Drawings

FIG. 1 is a schematic structural view of an environment-friendly chlorine-free pulp bleaching apparatus according to the present invention;

FIG. 2 is a schematic cross-sectional view of an environment-friendly chlorine-free pulp bleaching apparatus according to the present invention;

FIG. 3 is a schematic view of the structure of a stirring tube in a first working state of an environmentally friendly chlorine-free pulp bleaching apparatus according to the present invention

FIG. 4 is a schematic view of a second operation state of the agitator tube of the environmentally friendly chlorine-free pulp bleaching apparatus according to the present invention;

FIG. 5 is a schematic view of a top-down structure of a stirring blade in the environment-friendly chlorine-free pulp bleaching apparatus according to the present invention;

FIG. 6 is a schematic side sectional structural view of a stirring blade in an environment-friendly chlorine-free pulp bleaching apparatus according to the present invention;

FIG. 7 is a schematic view of a part of the structure of a bleaching agent adding mechanism in the environment-friendly chlorine-free pulp bleaching apparatus according to the present invention;

FIG. 8 is a schematic view of a partial structure of a bleaching agent adding mechanism in the environment-friendly chlorine-free pulp bleaching apparatus according to the present invention.

In the figure: 1. a tank body; 2. a support frame; 3. a helical blade; 4. a feed conduit; 5. a support; 6. a drive motor; 7. a stirring pipe; 8. a bleach addition mechanism; 81. a liquid storage tank; 82. a metering valve; 83. a liquid feeding pipe; 84. a liquid injection port; 85. a housing; 9. a connecting pipe; 10. stirring blades; 11. a liquid injection groove; 12. a sealing plate; 13. a limiting block; 14. a temperature controller; 15. a PTC heating sheet; 16. a groove; 17. a hopper; 18. a discharging pipe; 19. a chute; 20. a connecting plate; 21. a stop valve; 22. a heat-insulating layer; 23. double-layer laminated glass.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to fig. 1-8, an environment-friendly chlorine-free pulp bleaching apparatus, comprising:

the device comprises a plurality of tank bodies 1, wherein the lower end of each tank body 1 is fixedly connected with a support frame 2, the lower end of each tank body 1 is conical, the upper end and the lower end of each tank body 1 are communicated with discharge pipelines, the inner wall of each tank body 1 is provided with a helical blade 3, one side of each tank body 1 is communicated with a feed pipeline 4, and the feed pipelines 4 are arranged in a tangent manner with the tank bodies 1;

the stirring and separating mechanism is matched with the tank body 1 and comprises a support 5, the support 5 is fixedly connected with the upper end of the tank body 1, the upper end of the support 5 is fixedly connected with a driving motor 6, the output end of the driving motor 6 is fixedly connected with a stirring pipe 7, the side wall of the stirring pipe 7 is provided with a bleaching agent adding mechanism 8, the stirring pipe 7 is arranged in the tank body 1, the side wall of the stirring pipe 7 is provided with a plurality of round holes which are arranged in a surrounding manner, the round holes are connected with a connecting pipe 9 in a rotating manner, the joint of the connecting pipe 9 and the stirring blade 10 is not positioned at the middle position of the stirring blade 10, so that the stirring blade 10 can rotate under the action of the reaction force of raw materials when the stirring pipe 7 rotates, the stirring blade 10 is a material, one end of the connecting pipe 9 far away from the stirring pipe 7 is fixedly connected with the stirring blade 10, a liquid injection groove 11 communicated with the connecting pipe 9 is formed in the stirring blade 10, a sinking groove is formed in the side wall of the stirring blade 10 close to the liquid injection groove 11, the sinking groove is connected with a sealing plate 12 in a rotating manner, the outer side wall of the stirring pipe 7 is provided with a yielding groove, and a plurality of limiting block 13 is fixedly connected in the yielding groove;

temperature control unit, temperature control unit includes temperature controller 14, and temperature controller 14's temperature sensor is located jar 1 internal setting, temperature controller 14 sets up with the lateral wall fixed connection of

jar body

1, 14 electric connection of temperature controller has PTC heating plate 15, stirring leaf 10 is seted up flutedly 16 from the lateral wall in notes cistern 11, and PTC heating plate 15 is located the recess 16 and sets up.

Bleaching agent adds mechanism 8 and includes liquid storage pot 81, the lower extreme intercommunication of liquid storage pot 81 has metering valve 82, and metering valve 82's one end intercommunication has liquid feeding pipe 83, liquid mouth 84 has been seted up to the lateral wall of agitator tube 7, and agitator tube 7 is close to the lateral wall rotation cover of annotating liquid mouth 84 and is equipped with casing 85, casing 85 and liquid feeding pipe 83 intercommunication set up, this kind of design, even when agitator tube 7 rotates, annotate liquid mouth 84 and be in the state that communicates with casing 85 all the time, can be under the pivoted prerequisite of noninterference agitator tube 7, be convenient for the user to inject the bleaching agent in to agitator tube 7, through setting up metering valve 82, can be convenient for user control bleaching agent addition, effective control bleaching quality.

The upper end fixedly connected with hopper 17 of the jar body 1, and hopper 17 with be located jar body 1 upper end ejection of compact pipeline intercommunication setting, one side intercommunication of hopper 17 has the unloading pipe 18 that the slope set up, and through setting up hopper 17, the user of being convenient for collects the light object that the jar body 1 upper end ejection of compact pipeline flows to cooperation unloading pipe 18 carries out the drainage to the light object.

The stirring pipe 7 runs through the discharge pipeline arranged at the upper end of the tank body 1, and the bleaching agent adding mechanism 8 is arranged above the discharge pipeline.

Stirring leaf 10 is fan-shaped, spout 19 has been seted up to the lateral wall that stirring leaf 10 is close to agitator tube 7, and sliding connection has connecting plate 20 in spout 19, connecting plate 20 is interference fit with spout 19's inner wall, through setting up spout 19 cooperation sealing connection board 20, can have a plurality of stirring leaves 10 when rotating, there is not the clearance between stirring leaf 10 and the agitator tube 7, thereby improve the effect that stirring leaf 10 drove the light object and rise, and interference fit's connecting plate 20 and spout 19, can avoid during paper pulp gets into spout 19 on the one hand, on the other hand can also utilize the air in the spout 19 to form the effect of air spring, guarantee that connecting plate 20 can pop out in the spout 19.

A discharge pipeline positioned at the lower end of the tank body 1 is communicated with a stop valve 21.

The lateral wall parcel of the jar body 1 has heat preservation 22, and the observation window has been seted up to one side of the jar body 1, the embedded double-deck doubling glass 23 that is equipped with of observation window through setting up heat preservation 22, can improve the heat preservation effect of the jar body 1, reduces the heat and scatters and disappears, reduces the production energy consumption.

In the invention, when in use, a user injects raw materials into the tank body 1 through the feeding pipeline 4 and controls the driving motor 6 to drive the stirring pipe 7 to rotate in the positive direction, at the moment, the raw materials entering the tank body 1 along the tangent line of the tank body 1 can form a vortex shape in the tank body 1 under the driving of self kinetic energy, so as to reduce the starting resistance of the stirring blades 10, when the stirring blades 10 stir the raw materials, the reaction force of the raw materials on the stirring blades 10 enables the stirring blades 10 to rotate by taking the connecting pipe 9 as an axis until the stirring blades 10 are propped against the limiting block 13, the stirring blades 10 are in a discontinuous state, and the light objects in the middle part are driven to move downwards when rotating, so that the condition that the raw materials are layered or unevenly mixed is avoided, meanwhile, bleaching agents are injected into the stirring pipe 7 through the bleaching agent adding mechanism 8, and then flow into the raw materials along the liquid injection groove 11 after passing through the connecting pipe 9 under the action of centrifugal force, the raw materials are fully mixed and reacted under the driving of the stirring blades 10, the temperature in the tank body 1 is controlled through the temperature control assembly, the bleaching effect of the bleaching agent on the raw materials is ensured, then the bleaching agent finishes bleaching the raw materials, certain impurities can be generated in the bleaching process, and partial impurities exist in the raw materials, then the driving motor 6 is controlled to rotate reversely, at the moment, the stirring pipe 7 drives the stirring blades 10 to rotate reversely, when the stirring blades 10 rotate reversely, the stirring blades 10 are driven by the reaction force of the raw materials to rotate by taking the connecting pipe 9 as an axis until the stirring blades 10 abut against the limiting block 13, at the moment, the plurality of stirring blades 10 rotate to form a continuous spiral shape, so that the tank body 1 is matched with the stirring pipe 7 and the stirring blades 10 to form an effect similar to a cyclone separator, at the moment, a stop valve 21 positioned below the tank body 1 is opened by a user, at the moment, the heavy objects are discharged from the discharge pipeline below the tank body 1, and the light objects are discharged from the discharge pipeline above the tank body 1 along the stirring pipe 7, so that in terms of general production conditions, the heavy impurities are discharged firstly in the primary bleaching separation, and the light impurities are discharged in the subsequent bleaching separation, and the bleaching and separation can be carried out for multiple times according to the type of the chlorine-free bleaching agent.

The standard parts used in the present application document can be purchased from the market, each part in the present application document can be customized according to the records of the specification and the drawings, the specific connection mode of each part adopts the conventional means of mature bolts, rivets, welding and the like in the prior art, the machines, the parts and the equipment adopt the conventional types in the prior art, the control mode is automatically controlled by a controller, the control circuit of the controller can be realized by simple programming of a person skilled in the art, the control circuit belongs to the common knowledge in the field, and the present application document is mainly used for protecting a mechanical device, so the control mode and the circuit connection are not explained in detail in the present application document, and the detailed description is not given here.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. An environment-friendly chlorine-free pulp bleaching apparatus, comprising:

the device comprises a plurality of tank bodies (1), wherein the lower end of each tank body (1) is fixedly connected with a support frame (2), the lower end of each tank body (1) is conical, the upper end and the lower end of each tank body (1) are communicated with discharge pipelines, spiral blades (3) are arranged on the inner wall of each tank body (1), a feeding pipeline (4) is communicated with one side of each tank body (1), and the feeding pipelines (4) are arranged in a tangent mode with the tank bodies (1);

the stirring and separating mechanism is matched with the tank body (1) and comprises a support (5), the support (5) is fixedly connected with the upper end of the tank body (1), the upper end of the support (5) is fixedly connected with a driving motor (6), the output end of the driving motor (6) is fixedly connected with a stirring pipe (7), the side wall of the stirring pipe (7) is provided with a bleaching agent adding mechanism (8), the stirring pipe (7) is positioned in the tank body (1), the side wall of the stirring pipe (7) is provided with a plurality of round holes which are arranged in a surrounding mode, a connecting pipe (9) is rotationally connected in the round holes, one end, far away from the stirring pipe (7), of the connecting pipe (9) is fixedly connected with a stirring blade (10), a liquid injection groove (11) communicated with the connecting pipe (9) is formed in the stirring blade (10), a sinking groove is formed in the side wall, close to the liquid injection groove (11), of the stirring blade (10), the sinking groove is rotationally connected with a sealing plate (12), a yielding groove is formed in the outer side wall of the stirring pipe (7), and a plurality of limiting blocks (13) are fixedly connected in the yielding groove;

temperature control assembly, temperature control assembly includes temperature controller (14), temperature controller (14) set up with the lateral wall fixed connection of the jar body (1), temperature controller (14) electric connection has PTC heating plate (15), stirring leaf (10) keep away from the lateral wall in notes cistern (11) and offer recess (16), and PTC heating plate (15) are located and set up in recess (16).

2. The environment-friendly chlorine-free pulp bleaching apparatus as claimed in claim 1, wherein the bleach adding mechanism (8) comprises a liquid storage tank (81), a metering valve (82) is communicated with the lower end of the liquid storage tank (81), a liquid adding pipe (83) is communicated with one end of the metering valve (82), a liquid injecting port (84) is formed in the side wall of the stirring pipe (7), a shell (85) is rotatably sleeved on the side wall of the stirring pipe (7) close to the liquid injecting port (84), and the shell (85) is communicated with the liquid adding pipe (83).

3. The environment-friendly chlorine-free paper pulp bleaching apparatus as claimed in claim 1, wherein a hopper (17) is fixedly connected to the upper end of the tank body (1), the hopper (17) is communicated with a discharge pipe located at the upper end of the tank body (1), and a discharge pipe (18) arranged obliquely is communicated with one side of the hopper (17).

4. The environment-friendly chlorine-free pulp bleaching plant as recited in claim 1, wherein the agitator pipe (7) is disposed through a discharge conduit at an upper end of the tank (1), and the bleaching agent adding mechanism (8) is disposed above the discharge conduit.

5. The environment-friendly chlorine-free pulp bleaching apparatus as claimed in claim 1, wherein the stirring blade (10) is fan-shaped, a chute (19) is formed in a side wall of the stirring blade (10) close to the stirring pipe (7), a connecting plate (20) is connected in the chute (19) in a sliding manner, and the connecting plate (20) and an inner wall of the chute (19) are in interference fit.

6. An environment friendly chlorine-free pulp bleaching plant as claimed in claim 1, wherein the discharge conduit at the lower end of the tank (1) is connected to a shut-off valve (21).

7. The environment-friendly chlorine-free paper pulp bleaching equipment as claimed in claim 1, wherein the side wall of the tank body (1) is wrapped with an insulating layer (22), and one side of the tank body (1) is provided with an observation window, and a double-layer laminated glass (23) is embedded in the observation window.