CN220183695U - Slit type air-jet curtain for dry part air hood of paper machine and air hood of paper machine - Google Patents

Abstract

The utility model discloses a slit type air-jet curtain for a dry part air hood of a paper machine and the air hood of the paper machine, which are characterized in that: the wind channel comprises a wind channel main body, wherein an air inlet is arranged above the wind channel main body, and the air inlet is externally connected with a preset component of a paper machine gas hood; a steam outlet is arranged below the air duct main body, a first diversion inclined plate is arranged at one end of the steam outlet, and the first diversion inclined plate and the air duct main body form a preset angle; the steam outlet is slit-shaped. The utility model solves the technical problems of uneven heating, insufficient coverage degree and overlarge energy consumption in the prior art, and achieves the technical effects of uniform heating temperature and pressure, wide coverage surface, energy conservation and environmental protection.

Description

Slit type air-jet curtain for dry part air hood of paper machine and air hood of paper machine

Technical Field

The utility model relates to the technical field of papermaking equipment, in particular to a slit type air-jet curtain for a dry part air hood of a papermaking machine and the air hood of the papermaking machine.

Background

Paper is the most commonly used article in our daily life, and can be contacted with paper no matter reading, reading newspaper, or writing or drawing. Paper is also indispensible in industrial, agricultural and national defense industrial production. Paper is a powerful tool and material in terms of communicating ideas, propagating cultures, developing science and technology and production.

Modern papermaking processes can be divided into main steps of pulping, modulating, papermaking, processing and the like:

1. pulping process

Pulping is the first step in papermaking, and the general methods for converting wood into pulp include three methods, namely mechanical pulping, chemical pulping and semi-chemical pulping.

2. Modulation process

The modulation of the stock is another important point in papermaking, and the strength, tone, printability and the length of the paper shelf life after the paper is finished are directly related to the paper.

The common modulation process can be roughly divided into three steps of 1, dispersing slurry; 2. pulping; 3. adding glue and filling.

3. The main work of the paper making department is to interweave and dewater thin paper evenly, then dry, press polish, roll paper, cut, sort and package, so the common flow is as follows:

1. screening the paper stock, namely diluting the prepared paper stock again to a lower concentration, and screening impurities and undissociated fiber bundles again by means of screening equipment so as to maintain the quality and protect equipment.

2. And a wire part, wherein the paper material flows out from the head box and is uniformly distributed and interwoven on a circulating copper wire mesh or plastic wire.

3. The squeezing part is used for guiding the wet paper with the net surface removed to a position between two rollers with woolen cloth, and further dehydrating the wet paper by virtue of the squeezing action of the rollers and the water absorption action of the woolen cloth, so that the paper quality is compact, the paper surface is improved, and the strength is increased.

4. The water content of the wet paper after being pressed is up to 52% -70%, and at this time, the mechanical force can not be used to press the moisture, so that the wet paper can be dried by passing through a plurality of cylinder surfaces with hot steam introduced therein.

5. And (3) reeling, namely reeling the paper web into a paper roll by a reeling machine.

6. Cutting, sorting and packaging, namely taking a plurality of paper rolls which are rolled into a cylinder shape, cutting the paper into a piece of paper by a paper cutter, then manually or mechanically sorting, removing the paper with broken or stained paper, and finally packaging every five hundred paper sheets into a bag (commonly called a ream).

The wet paper after being pressed is dried into dry paper by steam, and the drying of the paper is the most critical step in the modern papermaking process. However, in the process of realizing the technical scheme in the prior art, the applicant finds that the technical scheme in the prior art has the following technical problems:

since a large amount of steam is required for drying paper, the energy consumption is increased, thereby increasing the production cost.

In addition, when the paper is dried, the hot air acts on the surface of the paper unevenly, so that the paper is heated and dried unevenly, and the quality of the paper is affected.

In addition, the drying process is not smooth due to the fact that the pressure of the air flow is uneven in the drying chamber, the quality of paper products is affected, and energy consumption is further improved.

More serious is that the dried paper is affected by the moisture of the wet part of the air hood at the dry part of the air hood, and even more, the cold air outside enters the air hood to affect the energy consumption of the air hood.

Disclosure of Invention

The utility model aims to solve the technical problems that the energy consumption is high, the production cost is high, the heating temperature and the air pressure are uneven, and the paper quality is affected when the paper is dried in the prior art, and at least one of the technical effects of reducing the energy consumption, heating uniformly and improving the paper quality is achieved.

In order to solve the technical problems, the technical scheme of the utility model is as follows:

a slit type air-jet curtain for a dry part air hood of a paper machine comprises an air duct main body, wherein an air inlet is arranged above the air duct main body, and the air inlet is externally connected with a preset component of the air hood of the paper machine; a steam outlet is arranged below the air duct main body, a first diversion inclined plate is arranged at one end of the steam outlet, and the first diversion inclined plate and the air duct main body form a preset angle; the duct body is located at a separation boundary between the dry and wet housing portions.

Preferably, another air duct main body is arranged below the dry cover part.

Preferably, the steam outlet is slit-shaped; and a second flow guiding inclined plate is arranged at one end of the steam outlet, which is far away from the first flow guiding inclined plate.

More preferably, a second flow guiding inclined plate parallel to the first flow guiding inclined plate is arranged at one end of the steam outlet far away from the first flow guiding inclined plate.

Particularly preferably, a third flow guiding inclined plate is arranged at one end of the steam outlet far away from the first flow guiding inclined plate, and the third flow guiding inclined plate is L-shaped.

Particularly preferably, one surface of the third deflector inclined plate is parallel to the first deflector.

The utility model also provides a paper machine gas hood comprising the slit type air-jet curtain for the dry part gas hood of the paper machine.

Preferably, the paper product conveying device comprises a shell, a paper product conveying component, a wet cover part, a dry cover part and an air distribution mechanism; the paper product transmission part, the wet cover part and the dry cover part are arranged in the shell; the air distribution mechanism penetrates through the shell and is communicated with the wet cover part; the air distribution mechanism is provided with an air inlet assembly, the air inlet assembly is provided with a plurality of hot air spraying ports, and the hot air spraying ports and the paper conveying component form a preset hot air outlet angle to form a preset hot air spraying direction;

the paper conveying component is provided with a roller, and paper is attached to the roller to rotate along with the rotation direction of the roller; the preset hot air spraying direction is opposite to the tangent line of the rotating direction of the roller.

Preferably, the position of the air outlet is higher than the position of the hot air injection port.

Preferably, the air distribution mechanism is also provided with a temperature and pressure probe; the air inlet assembly is provided with a main air inlet duct, a split air duct and an air spraying duct; the main air inlet channel is vertically connected and communicated with the split air channel; the air spraying pipe is vertically communicated with the air spraying pipe in a connecting way; a hot air spraying port is arranged at one end of the air spraying pipe, which is far away from the split air duct; the air distribution mechanism is further provided with an air outlet assembly, the air outlet assembly is provided with a main air exhaust groove, the main air exhaust groove is formed in the top of the split air duct, and the air outlet is arranged between the split air ducts below the main air exhaust groove.

The one or more technical schemes provided by the utility model have at least the following technical effects or advantages:

according to the technical scheme, the air inlet is arranged above the air tank main body and is externally connected with a preset component of the paper machine air hood; a steam outlet is arranged below the air duct main body, one end of the steam outlet is provided with a first diversion sloping plate, and the first diversion sloping plate forms a preset angle with the air duct main body; the steam outlet is slit-shaped. The wind current forms the strip line blowout in order to form a continuous uninterrupted wind wall, moisture and cold air can't get into in the gas hood easily. The technical problems of high energy consumption, high production cost, uneven heating temperature and air pressure and influence on paper quality during paper making and drying in the prior art are effectively solved. Thereby realizing the technical effects of reducing energy consumption, heating uniformly, improving paper quality and reducing cost.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic structural view of the air duct of the present utility model with a second baffle plate;

FIG. 3 is a schematic structural view of a wind trough with a third baffle plate according to the present utility model;

FIG. 4 is a schematic view of the structure of the present utility model as applied to a papermachine hood;

FIG. 5 is a schematic diagram of the airflow of the air curtain of the present utility model;

fig. 6 is a schematic diagram of the structure of the air curtain of the present utility model.

In the figure, 10, a wind groove main body; 11. the first diversion sloping plate, 13 and the second diversion sloping plate; 15. a third deflector swash plate; 100. a housing; 110. a wet cover portion; 120. a dry cover portion; 130. a paper transport unit 200 and an air distribution mechanism; 210. an air outlet assembly; 220. a main air inlet duct; 230. a split air duct; 240. an air spraying pipe; 300. a first duct body; 400. and a second duct body.

Detailed Description

The following describes the embodiments of the present utility model further with reference to the drawings. The description of these embodiments is provided to assist understanding of the present utility model, but is not intended to limit the present utility model. In addition, the technical features of the embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

In the papermaking process, the wet paper is dried by steam generally, but in the prior art, the uneven air pressure of a heating chamber is often caused by uneven steam distribution, and finally uneven heating is caused.

In addition, the paper quality is poor due to uneven heating.

In addition, uneven heating in turn leads to increased steam demand for drying paper, ultimately leading to problems of excessive energy consumption and increased production.

The technical scheme of the embodiment of the utility model solves the problems of high energy consumption, high production cost, uneven heating temperature and air pressure and influence on paper quality in the prior art when papermaking and drying by providing the slit type oblique angle air spraying groove for the air hood of the paper machine, wherein the first diversion oblique plate forms a preset angle with the air groove main body 10; the steam outlet is in a gap shape, so that the beneficial effects of reducing energy consumption, heating uniformly and improving paper quality are realized.

The general idea of the embodiment of the utility model for solving the technical problems is as follows:

the air inlet is formed in the upper portion of the air tank main body 10, and is externally connected with a preset component of a paper machine air hood; a steam outlet is arranged below the air duct main body 10, a first diversion sloping plate is arranged at one end of the steam outlet, and the first diversion sloping plate 11 forms a preset angle with the air duct main body 10; the steam outlet is slit-shaped. The wind current forms the strip line blowout in order to form a stifled continuous uninterrupted wind wall for the hot-blast even blowing out and the energy consumption reduces.

In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.

Slit type oblique angle air spraying groove for paper machine gas hood: as shown in fig. 1, the air duct comprises an air duct body 10, wherein an air inlet is arranged above the air duct body 10, and the air inlet is externally connected with a preset component of a paper machine air hood; a steam outlet is arranged below the air duct main body 10, a first diversion sloping plate is arranged at one end of the steam outlet, and the first diversion sloping plate 11 forms a preset angle with the air duct main body 10; the steam outlet is slit-shaped.

Specifically, as shown in fig. 2, a second deflector swash plate 13 is disposed at one end of the steam outlet, which is far away from the first deflector swash plate.

Specifically, one end of the steam outlet, which is far away from the first diversion sloping plate, is provided with a second diversion sloping plate 13 which is parallel to the first diversion sloping plate.

More specifically, as shown in fig. 3, a third deflector swash plate 15 is disposed at an end of the steam outlet, which is far away from the first deflector swash plate, and the third deflector swash plate 15 is L-shaped. The wind flow is gathered and dispersed before leaving the wind spraying groove, and is accelerated in a narrowed place according to fluid mechanics and then leaves the wind spraying groove, so that the wind flow has a certain speed when being sprayed.

In particular, one surface of the third baffle plate 15 is parallel to the first baffle plate.

A papermaker's hood comprising a slot bevel air chute as described above for the papermaker's hood, as shown in fig. 4, comprising a housing 100, a paper conveying element 130, wet and dry hood sections 110 and 120, and an air distribution mechanism 200: a paper conveying member 130, a wet cover part 110 and a dry cover part 120 are provided in the housing 100; the air distribution mechanism 200 penetrates through the shell 100 and is communicated with the wet cover part 110; the air distribution mechanism 200 is provided with an air inlet assembly, the air inlet assembly is provided with a plurality of hot air spraying openings, and the hot air spraying openings and the paper product transmission component 130 form a preset hot air outlet angle to form a preset hot air spraying direction.

The hot air spouts wind to the paper product through the plurality of hot air spouts to form a plurality of air walls (hot air walls), and hot air is rebounded upwards after acting on the surface of the paper product between the two air walls and is taken away by the air distribution mechanism 200, and the hot air evaporates the moisture of the paper product and takes away the moisture of the paper product along with the hot air taken away by the air distribution mechanism 200.

Specifically, the paper transporting member 130 is provided with a drum on which paper is attached to rotate with the rotation direction of the drum; the preset hot air spraying direction is opposite to the tangent line of the rotating direction of the roller. The tangential line of the hot air direction and the rotating direction of the roller is opposite to maximize the impulse when the hot air collides with the paper, so that the acting force of the hot air and the paper is improved, and the paper drying efficiency is improved.

More specifically, as shown in fig. 2, the air intake assembly is provided with a main air intake duct 220, a split air duct 230, and an air injection duct 240; the main air inlet duct 220 is vertically connected and communicated with the split air duct 230; the air spraying pipe 240 is vertically communicated with the air spraying pipe 240; the end of the air spraying pipe 240 away from the split air duct 230 is provided with a hot air spraying port.

More specifically, the air distribution mechanism 200 is further provided with an air outlet assembly 210, and the air outlet assembly 210 is provided with a plurality of air outlets, and the air outlets and the hot air outlets are staggered. The hot air applied to the surface of the paper takes away the moisture of the paper and then is discharged from the air outlet. Preferably, the position of the air outlet is higher than that of the hot air injection port.

In particular, the air distribution mechanism 200 is further provided with an air outlet assembly 210, the air outlet assembly 210 is provided with a main air exhaust groove, the main air exhaust groove is arranged at the top of the air distribution duct 230, and the air outlet is arranged between the air distribution ducts 230 below the main air exhaust groove.

In order to further improve the uniformity of the hot air acting on the surface of the paper, the shape of the hot air nozzle adopts a slit shape. The gap-shaped air outlet can increase the area of the air outlet compared with the hole-shaped air outlet.

As the cylinder rotates, the paper passes through the wet hood section, moisture is carried away by the steam, and then transferred to the dry hood section. In order to avoid that the dry hood part is affected by the moisture of the wet hood part, a first air curtain is provided at the separation boundary between the dry hood part and the wet hood part. The air curtain formed by hot air blocks moisture.

The air hood outlet is inevitably provided with an opening, and cold air easily enters the air hood from the opening, so that the energy efficiency and the drying effect of the air hood are affected. In order to prevent cold air from the hood outlet from entering the hood, a second air curtain is provided under the dry hood portion 120.

In order to further improve the energy-saving and environment-friendly characteristics of the device, the air distribution mechanism 200 is also provided with a temperature and pressure probe. And adjusting the opening and closing of the air door according to the temperature and the pressure.

In order to further improve the energy saving and environment friendly characteristics of the apparatus, as shown in fig. 5, a second air curtain is provided under (near the opening of) the dry cover part 120 in addition to the first air curtain provided at the separation boundary between the dry cover part 120 and the wet cover part 110. While preventing moisture from entering the dry housing portion 120, cold air may be further prevented from entering the housing 100.

To reduce the steam amount of the hood, the exhaust gas of the air outlet assembly 210 may be collected, and part of the exhaust gas may be recycled through an exhaust gas collection system.

The principle of the utility model is shown in fig. 5-6;

1. air-jet curtain structure:

1. two or more than two slit-type air spouts are adopted;

2. the side part is adopted for unilateral air intake, so that the cross section is continuously contracted, and the uniformity of air distribution is facilitated.

2. The function of the air curtain:

1. the paper surface drying efficiency is improved by spraying hot air to the paper surface;

2. the air jet beam forms an air curtain effect to prevent cold air outside the bottom of the air cover from entering the air cover at the dry part.

The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings, but the present utility model is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the utility model, and yet fall within the scope of the utility model.

Claims (10)

1. A slit type air-jet curtain for a dry end air hood of a paper machine, characterized in that: the wind channel comprises a wind channel main body, wherein an air inlet is arranged above the wind channel main body, and the air inlet is externally connected with a preset component of a paper machine gas hood; a steam outlet is arranged below the air duct main body, a first diversion inclined plate is arranged at one end of the steam outlet, and the first diversion inclined plate and the air duct main body form a preset angle; the duct body is located at a separation boundary between the dry and wet housing portions.

2. A slot air curtain for a dry end hood of a paper machine as claimed in claim 1, wherein: and another air duct main body is arranged below the dry cover part.

3. A slot air curtain for a dry end hood of a paper machine as claimed in claim 1, wherein: the steam outlet is in a slit shape; and a second flow guiding inclined plate is arranged at one end of the steam outlet, which is far away from the first flow guiding inclined plate.

4. A slot air curtain for a dry end hood of a paper machine as claimed in claim 1, wherein: and one end of the steam outlet, which is far away from the first diversion sloping plate, is provided with a second diversion sloping plate parallel to the first diversion sloping plate.

5. A slot air curtain for a dry end hood of a paper machine as claimed in claim 1, wherein: and a third flow guide inclined plate is arranged at one end of the steam outlet, which is far away from the first flow guide inclined plate, and the third flow guide inclined plate is L-shaped.

6. A slot air jet curtain for a dry end hood of a paper machine as set forth in claim 5 wherein: one surface of the third flow guiding inclined plate is parallel to the first flow guiding inclined plate.

7. A paper machine hood, characterized by: a slit air curtain for a dry end hood of a paper machine comprising any one of claims 1-6.

8. A paper machine hood as claimed in claim 7, characterized in that: comprises a shell, a paper product transmission part, a wet cover part, a dry cover part and an air distribution mechanism; the paper product transmission part, the wet cover part and the dry cover part are arranged in the shell; the air distribution mechanism penetrates through the shell and is communicated with the wet cover part; the air distribution mechanism is provided with an air inlet assembly, the air inlet assembly is provided with a plurality of hot air spraying ports, and the hot air spraying ports and the paper conveying component form a preset hot air outlet angle to form a preset hot air spraying direction;

the paper conveying component is provided with a roller, and paper is attached to the roller to rotate along with the rotation direction of the roller; the preset hot air spraying direction is opposite to the tangent line of the rotating direction of the roller.

9. A paper machine hood as claimed in claim 8, characterized in that: the position of the air outlet is higher than that of the hot air spraying port.

10. A paper machine hood as claimed in claim 8, characterized in that: the air distribution mechanism is also provided with a temperature and pressure probe; the air inlet assembly is provided with a main air inlet duct, a split air duct and an air spraying duct; the main air inlet channel is vertically connected and communicated with the split air channel; the air spraying pipe is vertically communicated with the air spraying pipe in a connecting way; a hot air spraying port is arranged at one end of the air spraying pipe, which is far away from the split air duct; the air distribution mechanism is further provided with an air outlet assembly, the air outlet assembly is provided with a main air exhaust groove, the main air exhaust groove is formed in the top of the split air duct, and the air outlet is arranged between the split air ducts below the main air exhaust groove.