Gas hood for paper drying

Abstract

The utility model belongs to the technical field of papermaking equipment, and particularly relates to a gas hood for drying paper, which comprises a drying cylinder, a wet part gas hood and a dry part gas hood are arranged at the top of the drying cylinder, and air outlet parts are arranged on the inner walls of the dry part gas hood and the wet part gas hood; the collecting structures are symmetrically arranged on the two sides of the drying cylinder and used for collecting generated steam; the air inlets are respectively formed in the top surfaces of the dry part gas hood and the wet part gas hood; and the hot air structure is arranged above the dry part gas hood and is connected with the air inlets of the dry part gas hood and the wet part gas hood respectively. The normal humidity of a workshop is prevented from being influenced by the generated steam, and the paper production quality is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of papermaking equipment, in particular to an air hood for drying paper. Background Art

[0002] Paper is the most commonly used item in our daily life. Whether we are reading, reading newspapers, writing or painting, we have to come into contact with paper.

[0003] However, during the drying process of the air hood, a large amount of steam will be generated on the paper. The steam generated has a great impact on the papermaking process, causing the edges of the paper to curl and resulting in a decrease in the quality of the finished paper. Utility Model Content

[0004] The purpose of the utility model is to provide an air hood for paper drying in response to the above-mentioned technical problems, thereby solving the problems raised in the background technology.

[0005] In view of this, the utility model provides an air hood for paper drying, comprising:

[0006] A drying cylinder, wherein a wet air hood and a dry air hood are provided on the top of the drying cylinder, and an air outlet is provided on the inner walls of the dry air hood and the wet air hood;

[0007] A collecting structure, symmetrically arranged on both sides of the drying cylinder, for collecting the generated steam;

[0008] Air inlets, the air inlets are respectively opened on the top surfaces of the dry air hood and the wet air hood;

[0009] The hot air structure is arranged above the dry air hood and is connected to the air inlets of the dry air hood and the wet air hood respectively.

[0010] In this technical solution, the hot air structure heats the air and delivers it to the dry and wet hoods. The hot air is then sprayed onto the paper surface on the drying cylinder via the air outlet, drying the paper. Furthermore, the symmetrically arranged collection structure collects the generated steam, preventing it from affecting the normal humidity in the workshop and improving paper production quality.

[0011] In the above technical solution, further, the hot air structure includes:

[0012] A heating element, which is arranged on the top surface of the dry air hood and the wet air hood, and is used to heat the air;

[0013] The air outlet pipes are symmetrically arranged on both sides of the heating element and are respectively connected to the air inlets on the dry air hood and the wet air hood;

[0014] An air intake pipe is arranged on the top of the heating element, and a heat recovery structure is provided between the air intake pipe and the collecting structure.

[0015] In this technical solution, air is delivered to the heating element via an air inlet pipe. A heat recovery device is provided to recover heat from the collected steam, reducing the energy consumption of the heating element. The heating element heats the air, and the outlet pipe delivers the heated air from the air inlet to the dryer and wet section hoods, accelerating the drying efficiency of paper on the outer wall of the drying cylinder.

[0016] In the above technical solution, further, the collection structure includes:

[0017] The collecting tank is symmetrically arranged on both sides of the dry part gas hood and the wet part gas hood, and a connecting pipe is arranged on the top of the collecting tank;

[0018] an air pump, the air pump being arranged between the end of the connecting pipe and the heat recovery structure and being used for extracting steam;

[0019] The first liquid drain pipe is arranged on the side wall of the collecting tank and is used to drain condensed water.

[0020] In this technical solution, the generated steam can be collected by the collection tanks symmetrically arranged on both sides of the dry air hood and the wet air hood, and the generated condensed water can be discharged from the collection tank through the first drain pipe, and the steam can be extracted and transported to the heat recovery structure through the air pump, so as to preheat the air in the air inlet pipe, which is beneficial to reduce the energy consumption of the heating element.

[0021] In the above technical solution, further, the heat recovery structure includes:

[0022] A heat exchange tube, wherein the heat exchange tube is arranged in the air inlet pipe, and both ends of the heat exchange tube pass through the side wall of the air outlet pipe, and one end is connected to the connecting pipe;

[0023] a second liquid discharge pipe, which is provided at the other end of the heat exchange tube and is used to discharge steam and condensed water;

[0024] Among them, the heat exchange tubes are symmetrically arranged.

[0025] In this technical solution, the air in the air intake pipe can be preheated by cooperating with the heat exchange pipe and the connecting pipe, and the steam and condensed water in the heat exchange pipe can be discharged through the second drain pipe.

[0026] In the above technical solution, further, the heat exchange tube is arranged in a serpentine shape in the area of ​​the air intake pipe.

[0027] In this technical solution, the serpentine arrangement of the heat exchange tube can increase the contact area with the air in the intake pipe, which is beneficial to improving the efficiency of heat conversion and reducing the energy consumption of the heating element.

[0028] In the above technical solution, further, the air outlet portion includes:

[0029] The cavity is provided between the wet end air hood and the dry end air hood, and air outlet slots are uniformly distributed circumferentially between the inner walls of the drying cylinder;

[0030] a first guide member, the first guide member being arranged in the air outlet slot and close to the drying cylinder;

[0031] a second guide member, the second guide member being arranged in the air outlet slot and arranged on a side of the first guide member;

[0032] The air outlet channel is arranged between the first guide member and the second guide member and is arranged obliquely.

[0033] In this technical solution, hot air enters the cavity through the air inlet. Through the cooperation between the air inlet pipe, the first guide member, the second guide member, and the air outlet channel, the hot air can be sprayed obliquely onto the surface of the paper, which is beneficial to increase the contact area between the air and the paper and improve the efficiency of paper drying.

[0034] In the above technical solution, further, the bottom of the collecting tank is arranged at an angle.

[0035] In this technical solution, the inclined bottom of the tank is helpful to improve the efficiency of discharging condensed water in the collection tank.

[0036] In the above technical solution, further, the lower end surfaces of the wet part air hood and the dry part air hood are both configured as a half-moon structure.

[0037] In this technical solution, the contact area between the wet-end air hood, the dry-end air hood and the drying cylinder can be increased by the half-moon structure, which is beneficial to improving the efficiency of paper drying.

[0038] The beneficial effects of the utility model are:

[0039] 1. The hot air structure heats the air and delivers it to the dryer and wet section hoods. The air outlet sprays the hot air onto the paper surface on the drying cylinder, drying it. Symmetrically arranged collection structures collect the generated steam, preventing it from affecting the normal humidity in the workshop and improving paper production quality.

[0040] 2. The generated steam can be collected by the collection tanks symmetrically arranged on both sides of the dry air hood and the wet air hood, and the generated condensed water can be discharged from the collection tank through the first drain pipe. The steam can be extracted and transported to the heat recovery structure through the air pump, and the air in the air inlet pipe can be preheated, which is beneficial to reduce the energy consumption of the heating element. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0042] Figure 2 It is a cross-sectional view of the utility model;

[0043] Figure 3 It is a three-dimensional schematic diagram of the collection structure of the utility model;

[0044] Figure 4 This is a cross-sectional view of the air intake pipe of the utility model;

[0045] Figure 5 This utility model Figure 2 Enlarged view of area A in the middle;

[0046] The marks in the figure are:

[0047] 1. Wet section air hood; 2. Dry section air hood; 3. Drying cylinder; 4. Air outlet; 401. Air outlet slot; 402. First guide member; 403. Second guide member; 404. Air outlet channel; 405. Cavity; 5. Collecting structure; 501. Collecting slot; 502. Connecting pipe; 503. Air pump; 504. First liquid discharge pipe; 6. Air inlet; 7. Hot air structure; 701. Heating element; 702. Air outlet pipe; 703. Air inlet pipe; 8. Heat recovery structure; 801. Heat exchange pipe; 802. Second liquid discharge pipe. DETAILED DESCRIPTION

[0048] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0049] In the description of this application, it should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0050] It should be noted that the terms "first," "second," etc. in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than those illustrated or described herein, and that the objects distinguished by "first," "second," etc. are generally of the same type, and do not limit the number of objects. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0051] It should be noted that, in the description of this application, the directions or positional relationships indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional terms do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional terms "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0052] It should be noted that, in the present application, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0053] Example 1:

[0054] Depend on Figure 1-Figure 5 As shown, this embodiment provides an air hood for paper drying, comprising: a drying cylinder 3, a wet air hood 1 and a dry air hood 2 are provided on the top of the drying cylinder 3, and an air outlet 4 is provided on the inner walls of the dry air hood 2 and the wet air hood 1; a collecting structure 5, the collecting structure 5 is symmetrically arranged on both sides of the drying cylinder 3 to collect the generated steam; an air inlet 6, the air inlet 6 is respectively opened on the top surface of the dry air hood 2 and the wet air hood 1; a hot air structure 7, the hot air structure 7 is arranged above the dry air hood 2 and is connected to the air inlets 6 of the dry air hood 2 and the wet air hood 1, respectively.

[0055] Hot air structure 7 heats the air and delivers it to dryer hood 2 and wet-end hood 1. Air outlet 4 sprays the hot air onto the paper surface on drying cylinder 3, drying the paper. Symmetrically arranged collection structures 5 collect the generated steam, preventing it from affecting the normal humidity in the workshop and improving paper production quality.

[0056] Furthermore, the hot air structure 7 includes: a heating element 701, which is arranged on the top surface of the dry air hood 2 and the wet air hood 1, and the heating element 701 is used to heat the air; an air outlet pipe 702, which is symmetrically arranged on both sides of the heating element 701 and is respectively connected to the air inlet 6 on the dry air hood 2 and the wet air hood 1; an air inlet pipe 703, which is arranged on the top of the heating element 701, and a heat recovery structure 8 is provided between the air inlet pipe 703 and the collection structure 5.

[0057] Air is delivered to the heating element 701 via the air inlet pipe 703. The heat recovery device recovers the heat from the collected steam, reducing the energy consumption of the heating element 701. The heating element 701 heats the air, and the heated air is delivered from the air inlet 6 to the dryer air hood 2 and the wet part air hood 1 via the air outlet pipe 702, thereby accelerating the drying efficiency of the paper on the outer wall of the drying cylinder 3.

[0058] Furthermore, the collection structure 5 includes: a collection tank 501, which is symmetrically arranged on both sides of the dry air hood 2 and the wet air hood 1, and a connecting pipe 502 is provided at the top of the collection tank 501; an air pump 503, which is arranged between the end of the connecting pipe 502 and the heat recovery structure 8 to extract steam; a first drain pipe 504, which is arranged on the side wall of the collection tank 501 to discharge condensed water.

[0059] The generated steam can be collected by the collection tanks 501 symmetrically arranged on both sides of the dry air hood 2 and the wet air hood 1, and the generated condensed water can be discharged from the collection tank 501 through the first drain pipe 504, and the steam can be extracted and transported to the heat recovery structure 8 through the air pump 503, so as to preheat the air in the air inlet pipe 703, which is beneficial to reduce the energy consumption of the heating element 701.

[0060] Example 2:

[0061] Depend on Figure 1-Figure 5 As shown, this embodiment provides an air hood for drying paper, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0062] Furthermore, the heat recovery structure 8 includes: a heat exchange tube 801, which is arranged in the air inlet pipe 703, and both ends of the heat exchange tube 801 pass through the side wall of the air outlet pipe 702, and one end is connected to the connecting pipe 502; a second drain pipe 802, which is arranged at the other end of the heat exchange tube 801 to discharge steam and condensed water; wherein the heat exchange tube 801 is symmetrically arranged.

[0063] Through the cooperation between the provided heat exchange tube 801 and the connecting tube 502, the air in the air inlet pipe 703 can be preheated, and the steam and condensed water in the heat exchange tube 801 can be discharged through the provided second drain pipe.

[0064] Furthermore, the heat exchange tube 801 is arranged in a serpentine shape in the area of ​​the air inlet pipe 703 .

[0065] The serpentine arrangement of the heat exchange tube 801 can increase the contact area with the air in the air inlet pipe 703 , which is beneficial to improving the efficiency of heat conversion and reducing the energy consumption of the heating element 701 .

[0066] Furthermore, the air outlet portion 4 includes: a cavity 405, which is arranged in the wet air hood 1 and the dry air hood 2, and air outlet slots 401 are evenly distributed circumferentially between the inner wall of the drying cylinder 3; a first guide member 402, which is arranged in the air outlet slot 401 and is arranged close to the drying cylinder 3; a second guide member 403, which is arranged in the air outlet slot 401 and is arranged on the side of the first guide member 402; an air outlet channel 404, which is arranged between the first guide member 402 and the second guide member 403 and is arranged at an angle.

[0067] Hot air enters the cavity 405 through the air inlet 6. Through the cooperation between the air inlet pipe 703, the first guide member 402, the second guide member 403, and the air outlet channel 404, the hot air can be sprayed obliquely onto the surface of the paper, which is beneficial to increase the contact area between the air and the paper and improve the efficiency of paper drying.

[0068] Furthermore, the bottom of the collecting tank 501 is inclined.

[0069] The inclined bottom of the tank is helpful to improve the efficiency of discharging condensed water in the collection tank 501.

[0070] Furthermore, the lower end surfaces of the wet part air hood 1 and the dry part air hood 2 are both configured as a half-moon structure.

[0071] The half-moon-shaped structure can increase the contact area between the wet-end air hood 1, the dry-end air hood 2 and the drying cylinder 3, which is beneficial to improving the efficiency of paper drying.

[0072] The embodiments of the present application are described above in conjunction with the accompanying drawings. Unless there is a conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A paper drying hood, characterized in that ,include: A drying cylinder (3), wherein a wet air hood (1) and a dry air hood (2) are provided on the top of the drying cylinder (3), and an air outlet (4) is provided on the inner walls of the dry air hood (2) and the wet air hood (1); A collecting structure (5), the collecting structure (5) being symmetrically arranged on both sides of the drying cylinder (3) for collecting the generated steam; Air inlets (6), the air inlets (6) being respectively provided on the top surfaces of the dry air hood (2) and the wet air hood (1); A hot air structure (7) is provided above the dry air hood (2) and is connected to the air inlets (6) of the dry air hood (2) and the wet air hood (1), respectively.

2. The air hood for paper drying according to claim 1, characterized in that: The hot air structure (7) comprises: A heating element (701), the heating element (701) is arranged on the top surface of the dry air hood (2) and the wet air hood (1), and the heating element (701) is used to heat the air; An air outlet pipe (702), the air outlet pipe (702) is symmetrically arranged on both sides of the heating element (701), and is respectively connected to the air inlet (6) on the dry air hood (2) and the wet air hood (1); An air intake pipe (703) is provided on the top of the heating element (701), and a heat recovery structure (8) is provided between the air intake pipe (703) and the collecting structure (5).

3. The air hood for paper drying according to claim 2, characterized in that: The collecting structure (5) comprises: A collecting tank (501), wherein the collecting tank (501) is symmetrically arranged on both sides of the dry gas hood (2) and the wet gas hood (1), and a connecting pipe (502) is arranged at the top of the collecting tank (501); an air pump (503), the air pump (503) being arranged between the end of the connecting pipe (502) and the heat recovery structure (8) for extracting steam; A first liquid drain pipe (504) is provided on a side wall of the collecting tank (501) for draining condensed water.

4. The air hood for paper drying according to claim 3, characterized in that: The heat recovery structure (8) comprises: A heat exchange tube (801), wherein the heat exchange tube (801) is arranged in the air inlet tube (703), and both ends of the heat exchange tube (801) pass through the side wall of the air outlet tube (702), and one end is connected to the connecting tube (502); A second liquid discharge pipe (802), which is provided at the other end of the heat exchange tube (801) and is used to discharge steam and condensed water; Wherein, the heat exchange tubes (801) are symmetrically arranged.

5. The air hood for paper drying according to claim 4, characterized in that: The heat exchange tube (801) is arranged in a serpentine shape in the area of ​​the air inlet pipe (703).

6. The air hood for paper drying according to claim 1, characterized in that: The air outlet portion (4) comprises: A cavity (405), wherein the cavity (405) is arranged in the wet part air hood (1) and the dry part air hood (2), and air outlet slots (401) are uniformly distributed circumferentially between the cavity and the inner wall of the drying cylinder (3); a first guide member (402), the first guide member (402) being arranged in the air outlet slot (401) and close to the drying cylinder (3); A second guide member (403), the second guide member (403) being arranged in the air outlet slot (401) and on a side of the first guide member (402); The air outlet channel (404) is arranged between the first guide member (402) and the second guide member (403) and is arranged at an angle.

7. The air hood for paper drying according to claim 6, characterized in that: The bottom of the collecting tank (501) is inclined.

8. The air hood for paper drying according to claim 1, characterized in that: The lower end surfaces of the wet part air hood (1) and the dry part air hood (2) are both configured as a half-moon structure.

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