CN215597916U

CN215597916U - Paper pulp flash drying system

Info

Publication number: CN215597916U
Application number: CN202121446919.5U
Authority: CN
Inventors: 李祥凌; 李艳; 黄晓强; 李忠良; 郑少斌; 胡剑斌
Original assignee: Fujian Light Industry Machinery & Equipment Co ltd
Current assignee: Fujian Light Industry Machinery & Equipment Co ltd
Priority date: 2021-06-28
Filing date: 2021-06-28
Publication date: 2022-01-21
Anticipated expiration: 2031-06-28

Abstract

The utility model discloses a pulp flash drying system, comprising: the device comprises a wind-heat device, a cyclone separation device, a multi-section first pipe body and a mixing and drying device; an air outlet of the air heating device is communicated with one end of the mixing and drying device through a first pipe body, the other end of the mixing and drying device is communicated with the cyclone separation device through the first pipe body, a feed inlet is formed in the first pipe body between the air heating device and the mixing and drying device, and the cyclone separation device is used for separating paper pulp and wet air; the pipe diameter of mixing and drying device is greater than the pipe diameter of first body, the moisture in the evaporation paper pulp of mixing and drying device. In above-mentioned technical scheme, can improve paper pulp drying efficiency through first body and mixed drying device's setting, further improve drying quality simultaneously.

Description

Paper pulp flash drying system

Technical Field

The utility model relates to the field of paper pulp drying equipment, in particular to a paper pulp flash drying system.

Background

Pulp is used as an important industrial raw material and widely applied to various fields of industrial manufacturing, pulp manufacturers dry the pulp for convenient transportation, and equipment such as a drying tower, a cyclone separator and the like are used in the existing pulp drying process; however, the existing drying tower has low drying rate and poor drying effect.

SUMMERY OF THE UTILITY MODEL

Therefore, it is desirable to provide a flash drying system for pulp that improves the drying efficiency of the pulp.

To achieve the above object, the present application provides a pulp flash drying system comprising: the device comprises a wind-heat device, a cyclone separation device, a multi-section first pipe body and a mixing and drying device;

an air outlet of the air heating device is communicated with one end of the mixing and drying device through a first pipe body, the other end of the mixing and drying device is communicated with the cyclone separation device through the first pipe body, a feed inlet is formed in the first pipe body between the air heating device and the mixing and drying device, and the cyclone separation device is used for separating paper pulp and wet air;

the pipe diameter of mixing and drying device is greater than the pipe diameter of first body, the moisture in the evaporation paper pulp of mixing and drying device.

Further, still include the scrubbing tower, the scrubbing tower passes through first body with cyclone separator switches on, the scrubbing tower is used for filtering and purifying the gas that cyclone separator discharged.

Further, a pulp recovery device is arranged at the bottom of the gas washing tower and used for recovering the pulp in the cleaning solution;

the pulp recovery apparatus includes: the filter screen is obliquely arranged at the water outlet end of the gas washing tower, the pulp inlet of the second pipe body is arranged below the filter screen, and the second pipe body is used for receiving the paper pulp on the filter screen.

Further, the wind-heat device is a hot blast stove.

Further, mix drying device and be a plurality of, and a plurality of mix drying device establishes ties in proper order through first body, and first mix drying device passes through first body with the air outlet of wind-heat device switches on, last mix drying device with through first body with cyclone switches on.

Further, the mixing and drying device is arranged vertically.

Further, still include: the pressure pump is arranged on the first pipe body between the mixing and drying device and the cyclone separation device and is used for increasing the gas flow rate.

Further, the mixing and drying device is communicated with the top of the cyclone separation device through the first pipe body.

Further, still include fire extinguishing apparatus, fire extinguishing apparatus includes: the spraying head is arranged in the mixing and drying device, and the sensor is arranged on the first pipe body between the wind-heat device and the mixing and drying device.

Be different from prior art, in above-mentioned technical scheme, can improve paper pulp drying efficiency through first body and mixed drying device's setting, further improve drying quality simultaneously.

Drawings

FIG. 1 is a block diagram of the pulp flash drying system;

FIG. 2 is a structural diagram of the cyclone separation device, the mixing and drying device and the scrubber tower;

FIG. 3 is an enlarged view taken at A in FIG. 2;

FIG. 4 is a view showing the structure of the feed port and the pressurizing pump.

Description of reference numerals:

1. a wind-heat device; 2. a cyclonic separating apparatus; 3. a first pipe body; 4. a mixing and drying device; 5. a scrubber tower; 6. a pressure pump; 7. a feed inlet;

51. a second tube body; 52. and (4) a filter screen.

Detailed Description

To explain technical contents, structural features, and objects and effects of the technical solutions in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.

Referring to fig. 1-4, the present application discloses a pulp flash drying system comprising: the device comprises a wind-heat device 1, a cyclone separation device 2, a multi-section first pipe body 3 and a mixing and drying device 4; an air outlet of the air heating device 1 is communicated with one end of the mixing and drying device 4 through the first pipe body 3, a feed inlet 7 is formed in the air outlet of the air heating device 1, the other end of the mixing and drying device 4 is communicated with the cyclone separation device 2 through the first pipe body 3, and the cyclone separation device 2 is used for separating paper pulp and wet air; the pipe diameter of mixing and drying device 4 is greater than the pipe diameter of first body 3, mixing and drying device 4 evaporates the moisture in the paper pulp. It should be noted that the feed inlet 7 is disposed at the front end of the mixing and drying device 4 and is used for providing pulp; specifically, the pulp enters from the feed inlet 7, moves to the mixing and drying device 4 under the action of the wind-heat device 1, and is dried in the mixing and drying device 4. It should be noted that the air heating device 1 is used for providing high-temperature hot air, the air heating device 1 is arranged at the front end of the pipeline where the feed port 7 is located, and the air heating device 1 blows the pulp entering from the feed port 7 into the mixing and drying equipment. In certain embodiments, the air heating device 1 is a heating blower device such as a hot blast stove.

It should be further noted that the cyclone separation device 2 is vertically arranged, and the cross section of the cyclone separation device 2 is circular, so that centrifugal force is generated conveniently. The cyclone separation device 2 separates the damp hot air from the pulp; specifically, the damp and hot air with the pulp enters the cyclone separation device 2 through the first pipe body 3, the damp and hot air enters the cyclone separation device 2 in the tangential direction, so that centrifugal force is generated in the cyclone separation device 2, the pulp moves downwards under the action of gravity and centrifugal force, the pulp is discharged from the bottom of the cyclone separation device 2, and the damp and hot air is discharged from the upper part of the cyclone separation device 2; preferably, the mixing and drying device 4 is communicated with the top of the cyclone separation device 2 through the first pipe 3.

It should be further explained that the mixing and drying device 4 is a mixing and drying pipe body, and the pipe diameter of the mixing and drying pipe body is larger than that of the first pipe body 3; in practical use, the hot air with pulp enters the mixing and drying tube body through the first tube body 3, and the flow speed of the hot air with pulp in the first tube body 3 is larger than that in the mixing and drying tube body because the tube diameter of the mixing and drying tube body is larger than that of the first tube body 3. When the hot air with the paper pulp enters the mixing and drying pipe body, the hot air and the paper pulp are fully mixed due to the fact that the flow speed is reduced, the contact time of the hot air and the paper pulp is further prolonged, and the drying quality is further improved. When hot air with pulp enters the first tube 3, the air velocity through the first tube 3 will be faster as the tube diameter becomes smaller, so that the pulp can reach the next equipment quickly.

In some embodiments, if multiple drying operations are required, the outlet at the bottom of the cyclone separation device 2 may be communicated with the inlet 7 to perform secondary drying of the slurry.

In actual operation, the pulp is blown up by the high-temperature hot air blown by the air heating device 1 and passes through the mixing and drying device 4, moisture is continuously evaporated in the mixing and drying device 4, the evaporated wet air and the pulp enter the cyclone separation device 2, and the pulp and the wet air are separated.

In above-mentioned technical scheme, can improve paper pulp drying efficiency through the setting of first body 3 and mix drying device 4, further improve dry quality simultaneously.

Referring to fig. 2 and 4, in order to prevent the gas discharged from the cyclone separation device 2 from polluting the air, in this embodiment, the cyclone separation device further includes a scrubber 5, the scrubber 5 is communicated with the cyclone separation device 2 through the first pipe 3, and the scrubber 5 is used for filtering and purifying the gas discharged from the cyclone separation device 2. It should be noted that the air inlet end of the scrubber 5 is connected to the air outlet at the top of the cyclone separation device 2 through the first pipe 3, and the air outlet end of the scrubber is communicated with the atmosphere, so that the filtered air can be discharged conveniently.

Referring to fig. 3, in the cyclone device 2, the flocculent pulp having a smaller density is discharged out of the cyclone device 2 together with the hot air, and the flocculent pulp having a larger density is discharged out of the bottom of the cyclone device 2. In order to recover the flocculent pulp with lower density, in the embodiment, a pulp recovery device is arranged at the bottom of the gas washing tower 5 and is used for recovering the pulp in the cleaning solution; the pulp recovery apparatus includes: the filter screen 52 is obliquely arranged at the water outlet end of the scrubbing tower 5, the pulp inlet of the second pipe body 51 is arranged below the filter screen 52, and the second pipe body 51 is used for receiving the pulp on the filter screen 52.

It should be noted that, when the pulp in the filter screen 52 reaches a certain weight, the pulp slides down in an inclined direction and enters the second pipe 51, so as to recover the pulp. Specifically, the filter screen 52 is obliquely arranged with one end lower and the other end higher, and the pulp inlet of the second pipe 51 is arranged below the lower end.

Referring to fig. 1 and 4, in some embodiments, the method further includes: and the pressure pump 6 is arranged on the first pipe body 3 between the mixing and drying device 4 and the cyclone separation device 2, and the pressure pump 6 is used for increasing the gas flow rate. It should be noted that, because the air flow rate from the mixing and drying device 4 is low, when entering the cyclone separation device 2, a large centrifugal force cannot be generated, which is not beneficial to the cyclone separation operation; therefore, the booster pump 6 is disposed in front of the cyclone 2 to increase the air flow rate.

Since the flash pulp drying system is used for drying pulp and high temperature will be generated during the operation of the system, in order to prevent the dried pulp from being ignited to damage the equipment, in this embodiment, the flash pulp drying system further comprises a fire extinguishing device, and the fire extinguishing device comprises: the device comprises a sensor and a spray header, wherein the spray header is arranged in the mixing and drying device 4, and the sensor is arranged on the first pipe body 3 between the wind-heat device 1 and the mixing and drying device 4. Of course, the first pipe 3 between the cyclone 2 and the mixing and drying device 4 will also be provided with sensors, while a shower head will also be provided in the cyclone 2. The flash drying system for paper pulp is prevented from being damaged by paper pulp ignition. When the sensor located in the first pipe body 3 senses a fire source, the sprinkler head will start working, spraying a large amount of fire extinguishing fluid.

Referring to fig. 2 and 4, in order to improve the drying effect of the mixing and drying device 4, in this embodiment, a plurality of mixing and drying devices 4 are sequentially connected in series through a first pipe 3, a first mixing and drying device 4 is communicated with the air outlet of the air heating device 1 through the first pipe 3, and a last mixing and drying device 4 is communicated with the cyclone separation device 2 through the first pipe 3; and the mixing and drying device 4 is vertically arranged.

It should be noted that a plurality of the mixing and drying devices 4 are arranged in an array in the horizontal direction. In some embodiments, a plurality of said mixing and drying means 4 are connected head to head through said first tubular body 3; in other embodiments, a plurality of the mixing and drying devices 4 are communicated through the first tube 3 to form a serpentine.

Preferably, there are two mixing and drying devices 4, and the two mixing and drying devices 4 and the first pipe 3 form an inverted U-shaped structural diagram. In practice, hot air enters from the bottom of one of the mixing and drying devices 4 and exits from the top into the first tubular body 3; the hot air then enters through the first tube 3 from the top of the other mixing and drying device 4 and exits from the bottom, completing the pulp drying.

It should be noted that, although the above embodiments have been described herein, the utility model is not limited thereto. Therefore, based on the innovative concepts of the present invention, the technical solutions of the present invention can be directly or indirectly applied to other related technical fields by making changes and modifications to the embodiments described herein, or by using equivalent structures or equivalent processes performed in the content of the present specification and the attached drawings, which are included in the scope of the present patent.

Claims

1. A pulp flash drying system, comprising: the device comprises a wind-heat device, a cyclone separation device, a multi-section first pipe body and a mixing and drying device;

2. A pulp flash drying system according to claim 1 further comprising a scrubber tower in fluid communication with the cyclone through the first tube, the scrubber tower for filtering and purifying gas exiting the cyclone.

3. A pulp flash drying system according to claim 2, wherein a pulp recovery device is provided at the bottom of the washing liquid for recovering the pulp in the washing liquid;

4. A pulp flash drying system according to claim 1 wherein the air heating device is a hot blast stove.

5. The pulp flash drying system of claim 1, wherein the number of the mixing and drying devices is plural, and plural mixing and drying devices are connected in series in sequence through a first pipe, and a first mixing and drying device is communicated with the air outlet of the air heating device through the first pipe, and a last mixing and drying device is communicated with the cyclone separation device through the first pipe.

6. A pulp flash drying system according to claim 1 or 5, characterized in that the mixing and drying device is arranged vertically.

7. A pulp flash drying system according to claim 1, further comprising: the pressure pump is arranged on the first pipe body between the mixing and drying device and the cyclone separation device and is used for increasing the gas flow rate.

8. A pulp flash drying system according to claim 1 wherein the mixing and drying device is in communication with the top of the cyclonic separation device via the first tube.

9. A pulp flash drying system according to claim 1 further comprising a fire suppression apparatus, the fire suppression apparatus comprising: the spraying head is arranged in the mixing and drying device, and the sensor is arranged on the first pipe body between the wind-heat device and the mixing and drying device.