CN214831485U - Thermal grinding slurry spraying device - Google Patents

Abstract

The utility model relates to a hot-milling guniting device, which comprises a slurry tank, a guniting cabin arranged at the top of the slurry tank, a guniting pipe inserted in the guniting cabin and a water seal cabin arranged at the top of the guniting cabin, wherein the upper end of the guniting cabin is horizontally provided with a water dispersion baffle plate, a condensing device is arranged below the water dispersion baffle plate, the lower end of the guniting pipe is provided with a guniting port which is positioned below the condensing device, the upper end of the water seal cabin is provided with a first water inlet pipeline, and the lower end of the water seal cabin is communicated with the guniting cabin; the utility model discloses simple structure, the preparation is convenient, and the steam cooling and the wood fibre of being convenient for are collected, effectively reduce the equipment energy consumption and reduce the plant maintenance work load.

Description

Thermal grinding slurry spraying device

Technical Field

The utility model relates to a slurrying technical field among the papermaking industry, concretely relates to hot grinding spouts puts device.

Background

Mechanical pulp is the most common process raw material in the paper industry, and compared with the traditional chemical pulp, the mechanical pulp has the characteristics of small pollution, low total energy consumption of finished pulp and relatively complete fiber. In order to improve the pulping efficiency and reduce the energy consumption of a pulping machine and improve the pulping process in recent papermaking, a pre-steaming chamber is arranged before wood chips enter pulping equipment, and steam is used for preheating for 10-30 min; the papermaking fibers obtained from this process are referred to as hot refining. The dryness of the wood chips treated by the process is 35-55%, so that the obtained wood fiber has high dryness and poor fluidity. A steam pipeline is usually added on one side of a wood grinding machine where fibers are discharged, steam with pressure is used as a fluid medium for conveying the fibers, the ground wood fibers are conveyed to a fiber collecting device, and the collected wood fibers are diluted into slurry with solid content of 3-10% and better fluidity by adding water to participate in subsequent process treatment.

In the traditional thermal pulping process, a spraying cabin collects fibers in a cyclone separation mode, then the fibers are conveyed to a pulp tank by a screw conveyor, water is added into the pulp tank for dilution, and tail gas of a cyclone separator is pumped to other places by a heat pump for recycling. The process has the advantages that the slurry concentration is controlled stably, but the practical use finds that the slurry concentration is not significant, and the energy of the steam recovered by the heat pump is lower than that consumed by the heat pump; the energy consumption of the cyclone separator and the spiral conveyor is large, and the maintenance workload of the equipment is large.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model aims at providing a thermal mortar spraying device.

The purpose of the utility model can be realized by the following technical scheme: the utility model provides a device is put in hot ground paste spouting, includes the thick liquid pond, set up in the spouting of thick liquid pond top put the cabin, insert and locate the spout pipe of putting the under-deck and set up in the water seal cabin of spouting the cabin top, the upper end level of spouting the cabin is provided with the water baffle that looses, the below of water baffle is provided with condensing equipment, spout the pipe lower extreme and be equipped with the mouth of spouting, spout the below that the mouth is located condensing equipment, water seal cabin upper end is provided with first inlet channel, water seal cabin lower extreme and spout the cabin and be linked together.

Furthermore, the distance h between the spraying opening and the bottom of the condensing device is more than 1 m.

Further, the water seal cabin includes cylinder on upper portion and the cone of lower part, and first inlet channel arranges along the tangential direction of cylinder, and the bottom of cone is seted up with the outlet of spouting the cabin intercommunication.

Furthermore, the condensing device is a plurality of condensing pipes which are vertically arranged or a plurality of condensing plates which are horizontally arranged.

Furthermore, the condenser pipe has 2 ~ 5 layers of arrangement in spouting the cabin, and every layer of condenser pipe is honeycomb structure and arranges.

Further, the condensation plates are arranged in a layered structure in the spraying and placing cabin, the distance between every two adjacent layers of condensation plates is 5-20 cm, a plurality of through holes are formed in each layer of condensation plate, and the adjacent two layers of through holes are staggered up and down.

Furthermore, a second water inlet pipeline is arranged on the wall surface of the spraying cabin above the water distribution partition plate, and a plurality of first water distribution holes which are uniformly distributed are formed in the water distribution partition plate.

Furthermore, a water distribution pipe is correspondingly arranged at the lower side of each water distribution hole, and a plurality of second water distribution holes are formed in the pipe wall of each water distribution pipe.

Furthermore, a pressure relief pipe is arranged at the top of the water seal cabin, and the tail end of the pressure relief pipe is communicated with the slurry pond or the spraying cabin.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a take area steam to blow in wood fibre from spouting to put the mouth and spout and put the under-deck, then the cooling water homodisperse that the water sealed cabin let in first inlet channel, and fall on condensing equipment surface formation water film, the time of extension cooling water to whereabouts, thereby the extension is spouted and is put the heat transfer time of under-deck steam, the water droplet whereabouts that form after the heat transfer is used for subsiding and spouts the wood fibre of putting out, the device simple structure, the preparation is convenient, the steam cooling and the wood fibre of being convenient for are collected, effectively reduce equipment energy consumption and reduction plant maintenance work load.

Drawings

The present invention is further explained by using the drawings, but the embodiments in the drawings do not constitute any limitation to the present invention, and for those skilled in the art, other drawings can be obtained according to the following drawings without any inventive work.

Fig. 1 is a schematic structural view of a thermal mortar spraying device according to an embodiment of the present invention.

Fig. 2 is a top view structural diagram of a condenser tube in a thermal mortar spraying device according to an embodiment of the present invention.

Fig. 3 is a top view structural diagram of a condensation plate in a thermal mortar spraying device according to an embodiment of the present invention.

Fig. 4 is a schematic structural view of the cooperation between the water-dispersing partition and the spraying chamber in the thermal mortar spraying device of the embodiment of the present invention.

The reference numbers shown in the figures denote: 1. a pulp tank; 2. a spraying cabin; 3. a condensing unit; 4. a water dispersing partition plate; 5. a blow-off pipe; 6. a pressure relief pipe; 7. sealing the cabin with water; 8. a first water inlet pipe; 9. a second water inlet pipe; 10. a slurry discharge pipe; 11. a slurry discharging pump; 12. a first water distribution hole; 13. a water distribution pipe; 14. a second water distribution hole; 15. a condenser tube; 16. a condensing plate; 17. and a through hole.

Detailed Description

It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The technical solution of the present invention will be described clearly and completely with reference to the following specific embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1, the structure of the present invention is: a thermal mortar spraying device comprises a mortar pool 1, a spraying chamber 2 arranged at the top of the mortar pool 1, a spraying pipe 5 inserted in the spraying chamber 2 and a water seal chamber 7 arranged at the top of the spraying chamber 2, wherein the upper end of the spraying chamber 2 is horizontally provided with a water dispersion baffle plate 4, a condensing device 3 is arranged below the water dispersion baffle plate 4, the lower end of the spraying pipe 5 is provided with a spraying opening which is positioned below the condensing device 3, the upper end of the water seal chamber 7 is provided with a first water inlet pipeline 8, the lower end of the water seal chamber 7 is communicated with the spraying chamber 2, wood fibers are blown into the spraying chamber 2 from the spraying opening through pressurized steam, then the water-sealed cabin 7 uniformly disperses the cooling water introduced by the first water inlet pipeline 8 and falls on the surface of the condensing device 3 to form a water film, the time of the cooling water falling downwards is prolonged, thereby prolonging the heat exchange time of the steam in the blowing chamber 2, and the water drops formed after the heat exchange fall down for settling the wood fiber blown out.

Further, the distance h between the spraying opening and the bottom of the condensing device 3 is larger than 1m, wood fibers sprayed from the spraying opening can upwards splash or drift around a small amount, the distance between the spraying opening and the condensing device 3 is prolonged, so that the upward drift time of the wood fibers is prolonged, water drops falling from the condensing device 3 are ensured to be fully settled, and the fibers are prevented from being accumulated or adhered to the condensing device 3.

Furthermore, the water seal cabin 7 comprises an upper cylinder and a lower cone, the first water inlet pipeline 8 is arranged along the tangential direction of the cylinder, a water outlet communicated with the spraying cabin 2 is formed in the bottom of the cone, cooling water (water pressure of 2-3bar) in the first water inlet pipeline 8 enters from the tangential direction of the cylinder, the cooling water has the tendency of free falling under the influence of gravity, the water flow generates a spiral motion track, when flowing to the lower cone, a centripetal force is generated on the water flow due to the bearing effect of a conical surface, and after flowing out of the water outlet, the water flow can move for a short distance along the axial direction of the cone and shrink at the outlet; the centripetal force disappears due to the loss of the bearing effect of the conical surface, the strong centrifugal force can disperse water, the water is uniformly sprayed on the condensing device 3, the heat exchange area with the steam is increased, and the heat exchange efficiency is improved.

As shown in fig. 2 and fig. 3, the condensing device 3 is a plurality of condensing tubes 15 vertically arranged or a plurality of condensing plates 16 horizontally arranged.

As shown in figure 1, the condenser pipe 15 is arranged 2 ~ 5 layers in the blowing cabin 2, as shown in figure 2, every layer of condenser pipe 15 is honeycomb structure and arranges, and the cooling water flows in from the condenser pipe 15 upper end mouth, forms the water film on the 15 pipe wall surfaces of condenser pipe, increases the heat transfer area with steam, is favorable to improving heat exchange efficiency.

As shown in fig. 3, the condensing plates 16 are arranged in the spraying cabin 2 in a layered structure, the distance between two adjacent layers of condensing plates 16 is 5-20 cm, a plurality of through holes 17 are formed in each layer of condensing plate 16, the two adjacent layers of through holes 17 are staggered up and down, cooling water flows in from the through holes 17 on the uppermost layer, then a water film is formed on the surface of each layer of condensing plate 16, the heat exchange area with steam is increased, and the improvement of the heat exchange efficiency is facilitated.

As shown in fig. 4, a second water inlet pipe 9 is disposed on the wall surface of the spraying chamber 2 above the water-dispersing partition plate 4, a plurality of first water distribution holes 12 are uniformly distributed on the water-dispersing partition plate 4, cooling water is introduced through the second water inlet pipe 9, and the cooling water is uniformly sprayed on the condensing device 3 through the first water distribution holes 12 on the water-dispersing partition plate 4, which is beneficial to improving heat exchange efficiency.

As shown in fig. 4, a water distribution pipe 13 is correspondingly disposed at the lower side of each water distribution hole 12, a plurality of second water distribution holes 14 are disposed on the pipe wall of the water distribution pipe 13, and water can be more uniformly sprinkled on the condensing device 3 by disposing the water distribution pipe 13, thereby further improving the heat exchange efficiency.

As shown in figure 1, the top of water seal cabin 7 is provided with pressure release pipe 6, and the end of pressure release pipe 6 communicates with thick liquid pond 1 or spouting cabin 2, through setting up pressure release pipe 6, has the pressure release cooling effect, makes the device internal pressure more stable.

During the specific use, blow in the wood fibre from spouting the mouth through pressing the area and put the under-deck, then the cooling water homodisperse that the water sealed cabin let in first inlet channel to fall on condensing equipment surface formation water film, the time of extension cooling water whereabouts, thereby the extension is spouted the heat transfer time of putting under-deck steam, and the water droplet whereabouts that forms after the heat transfer is used for subsiding and is spouted the wood fibre of putting.

The present invention has been further described with reference to specific embodiments, but it should be understood that the specific description herein should not be construed as limiting the spirit and scope of the present invention, and that various modifications to the above-described embodiments, which would occur to persons skilled in the art after reading this specification, are within the scope of the present invention.

Claims (9)

1. The utility model provides a hot slurry spraying device which characterized in that: including thick liquid pond (1), set up in spouting of thick liquid pond (1) top put cabin (2), insert and locate spout in spouting the cabin (2) put pipe (5) and set up in spouting the water seal cabin (7) of putting cabin (2) top, the upper end level of spouting the cabin (2) of putting is provided with the water baffle (4) that looses, the below of water baffle (4) that looses is provided with condensing equipment (3), spout pipe (5) lower extreme and be equipped with the spout mouth, the spout mouth is located the below of condensing equipment (3), water seal cabin (7) upper end is provided with first inlet channel (8), water seal cabin (7) lower extreme is linked together with the cabin (2) of putting of spouting.

2. The thermal mortar blowing apparatus of claim 1, wherein: the distance h between the spraying opening and the bottom of the condensing device (3) is more than 1 m.

3. The thermal mortar blowing apparatus of claim 1, wherein: the water seal cabin (7) comprises a cylinder on the upper portion and a cone on the lower portion, the first water inlet pipeline (8) is arranged along the tangential direction of the cylinder, and a water outlet communicated with the spraying cabin (2) is formed in the bottom of the cone.

4. The thermal mortar blowing apparatus of claim 1, wherein: the condensing device (3) is a plurality of condensing pipes (15) which are vertically arranged or a plurality of condensing plates (16) which are horizontally arranged.

5. The thermal mortar blowing apparatus of claim 4, wherein: the condensation pipes (15) are arranged in the spraying and placing cabin (2) in 2-5 layers, and each layer of condensation pipes (15) are arranged in a honeycomb structure.

6. The thermal mortar blowing apparatus of claim 4, wherein: the condensation plates (16) are arranged in the spraying cabin (2) in a layered structure, the distance between every two adjacent condensation plates (16) is 5-20 cm, each layer of condensation plate (16) is provided with a plurality of through holes (17), and the adjacent two layers of through holes (17) are staggered up and down.

7. The thermal mortar blowing apparatus of claim 1, wherein: the wall surface of the spraying cabin (2) above the water-dispersing partition plate (4) is provided with a second water inlet pipeline (9), and the water-dispersing partition plate (4) is provided with a plurality of first water distribution holes (12) which are uniformly distributed.

8. The thermal mortar blowing apparatus of claim 7, wherein: a water distribution pipe (13) is correspondingly arranged on the lower side of each water distribution hole (12), and a plurality of second water distribution holes (14) are formed in the pipe wall of each water distribution pipe (13).

9. The thermal mortar blowing apparatus of claim 1, wherein: the top of the water seal cabin (7) is provided with a pressure relief pipe (6), and the tail end of the pressure relief pipe (6) is communicated with the slurry pond (1) or the spraying cabin (2).

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