Atomizing head of high-speed centrifugal atomizing machine

Abstract

The atomizing head of the high-speed centrifugal atomizing machine comprises a bottom shell, a transmission shaft, a flow guide block, a nozzle and a top cover, the transmission shaft penetrates through the bottom shell and the top cover, the bottom shell and the top cover are connected with the transmission shaft and execute synchronous rotating motion along with the transmission shaft, the nozzle circumferentially sprays feed liquid, and the flow guide block is arranged on the transmission shaft in a sleeved mode and axially limited. A feed liquid guide part is formed on the guide block, a plurality of nozzle mounting holes are formed in the side wall of the bottom shell, and the feed liquid spray holes face upwards and downwards, so that the upper space of the desulfurization tower can be fully utilized by spraying of the nozzles, the axial spraying range is larger when the feed liquid is sprayed, and the mass and heat transfer effect of spray drying is better; therefore, the desulfurization effect of the high-speed centrifugal atomizer is better.

Description

Technical Field

[0001] The utility model relates to the technical field of atomization equipment, in particular to an atomization head used on a high-speed centrifugal atomizer. Background Art

[0002] With the continuous improvement of environmental protection requirements, flue gas desulfurization and dust removal has become an essential part of industrial production. Not only large power generation companies need to add desulfurization and dust removal equipment, but general industrial kilns and production heating furnaces also need to add desulfurization and dust removal equipment. Spray drying flue gas desulfurization has a short process flow, simple equipment, high desulfurization efficiency, and is more suitable for desulfurization and dust removal of small and medium-sized industrial furnaces. In order to improve the efficiency of flue gas desulfurization and save the operating cost of the desulfurization device, the atomization effect of the desulfurizer must be strengthened. Therefore, most of the existing atomizers for flue gas desulfurization use high-speed centrifugal atomization. During its working stage, the desulfurizer and diluent are atomized by a high-speed rotating atomizer head and sprayed into the desulfurization tower.

[0003] Most of the desulfurizers currently in use are alkaline, and the solution contains a solid phase (mostly in granular form). Since the atomizer head is in a state of continuous high-speed rotation during its working stage, when the particles and solution enter the high-speed centrifugal atomizer, the interior of the atomizer head will suffer a certain degree of impact wear and corrosion, and the corrosion phenomenon is generally more serious.

[0004] At the same time, the atomizer head currently used in the high-speed centrifugal atomizer has the following main problems: 1. After the nozzle part of the atomizer head is set inside the atomizer head, in order to prevent the problem of side leakage of the feed liquid, a sealing ring is usually added to the nozzle part. However, in actual use, it is found that since the general sealing ring is made of organic material, the sealing ring will be easily aged and damaged in a high temperature environment, which will affect the service life of the atomizer head; 2. The general desulfurizer feed liquid is sprayed out of the spray hole part of the nozzle on a horizontal plane, but in actual use, it is found that the feed liquid is a mixture of calcium oxide, calcium hydroxide and water, and during the working process of the feed liquid, it must react with the sulfur dioxide flue gas in the desulfurization tower to achieve desulfurization, and it needs to be thoroughly dried after the desulfurization is completed, but the existing feed liquid sprayed is on a horizontal plane, which makes it The slurry will be evaporated, which will affect the desulfurization efficiency and cause poor mass and heat transfer with hot air or flue gas. At the same time, since it is always sprayed on one surface, it will also affect the spray drying of the slurry; 3. The existing guide block used in the atomizer head is generally made of stainless steel. In the actual use of the atomizer head, it will not have enough wear resistance, and the fluid with abrasive particles has strong impact wear and tear, which can easily wear out the atomizer head; 4. In addition, the nozzle part and the atomizer head mostly adopt interference fit, that is, the fit requirements are very high, and it is necessary to ensure that the nozzle can be disassembled and assembled on the atomizer head. Generally, the nozzle needs to be frosted before fitting, which makes the molding process of the nozzle part cumbersome. It is too interference fit, so that the disassembly process requires a large force to be pressed or removed, which makes it inconvenient to disassemble and replace it, and the disassembly cost is also relatively high. Summary of the invention

[0005] In view of the above-mentioned deficiencies, the utility model provides an atomizing head which can be used in a high-speed centrifugal atomizer to improve the mass transfer and heat transfer effect of spray drying and extend the service life of the atomizing head.

[0006] In order to achieve the above purpose, the utility model adopts an atomizing head of a high-speed centrifugal atomizer, including a bottom shell, a transmission shaft, a guide block, a nozzle containing a liquid spray hole, and a top cover which is arranged on the bottom shell and adapted and has a liquid inlet. The transmission shaft passes through the bottom shell and the top cover. The bottom shell and the top cover are connected to the transmission shaft and perform synchronous rotation with the transmission, and form a nozzle to spray the liquid circumferentially. A nozzle mounting hole for inserting the nozzle is opened on the side wall of the bottom shell. The guide block is distributed in the bottom shell, and is sleeved on the transmission shaft and performs axial limitation. A liquid guide portion is formed on the guide block. Through the liquid guide portion, the liquid entering the bottom shell through the liquid inlet is guided to the nozzle. There are a plurality of nozzle mounting holes, which are evenly distributed on the side wall of the bottom shell. The liquid spray holes of the nozzles inserted in the nozzle mounting holes are oriented upward and downward.

[0007] The above-mentioned beneficial effect lies in that: by adopting two settings of the nozzle used in the atomizing head, facing upward or downward, the spray angle of the nozzle is changed, that is, the upper space of the desulfurization tower is fully utilized, so that when the feed liquid is sprayed, the axial range of the spray of the atomizing head is larger, and the spray drying mass transfer and heat transfer effect is better, thereby making the desulfurization effect of the high-speed centrifugal atomizer better. At the same time, during the working process of the atomizing head, the bottom shell, the top plate and the internal components can be rotated synchronously after the transmission shaft is rotated, that is, the high-speed rotation stage, which produces a huge centrifugal force, driving the feed liquid into the bottom shell through the feed liquid inlet and sprayed out through the nozzle. After the high-speed liquid flow interacts with the airflow, the feed liquid is stretched, oscillated, and broken into a mist distribution, and then mass and heat transfer are carried out with the flue gas, thereby completing the desulfurization operation.

[0008] The utility model is further configured such that the upward and downward liquid spray holes arranged on the side wall of the bottom shell are circumferentially spaced on the side wall of the bottom shell; through the above-mentioned arrangement, the upward and downward nozzle stages can be achieved, and the sprayed liquid is sprayed more evenly in the desulfurization tower, avoiding the unreliable operation caused by, for example, the upward nozzle is set on one side and the downward nozzle is set on the other side.

[0009] The utility model is further configured that the nozzle includes a nozzle pipe and a nozzle sleeve, the nozzle sleeve is arranged on the outside of the nozzle pipe, and the liquid spray holes are distributed on the nozzle pipe; through the above, the nozzle design can be reliable, and the liquid spray holes can also be reliably arranged on the nozzle.

[0010] The utility model is further configured such that the atomizing head also includes an inner positioning cylinder, the inner positioning cylinder includes a plurality of material-liquid transition parts and a plurality of nozzle baffles opened on the inner positioning cylinder, the number of the plurality of material-liquid transition parts is adapted to the number of nozzle mounting holes and is evenly distributed on the inner positioning cylinder, the number of the plurality of nozzle baffles is adapted to the number of the plurality of material-liquid transition parts, and the plurality of nozzle baffles are distributed one by one in intervals between the plurality of material-liquid transition parts in the plurality of material-liquid transition parts; through the above-mentioned configuration, after the inner positioning cylinder is configured, the situation where the material-liquid is interfered with when entering the nozzle stage can be avoided, and the reliability of the design is also guaranteed.

[0011] The utility model is further configured such that a step portion is formed on the nozzle sleeve relative to a side away from the nozzle pipe, and a step groove adapted to the step portion is formed on the hole wall of the nozzle mounting hole, and the step portion and the step groove cooperate to prevent the liquid entering the bottom shell from leaking at the nozzle, and to form a limit for the nozzle to move toward the outside of the bottom shell;

[0012] The inner positioning tube is placed in the bottom shell, and the nozzle baffles on the inner positioning tube are distributed between the nozzles to form a shield for the stepped portion on the nozzle, to limit the nozzles on the side wall of the bottom shell, and to form a retreat for the nozzles in the bottom shell.

[0013] Through the above-mentioned arrangement, it is possible to avoid the situation where the nozzle accidentally falls out after being set in the atomizer head, and through the effect of the internal positioning tube, it is also possible to avoid the situation where the nozzle accidentally falls into the inside of the atomizer head after being set. At the same time, the atomizer head designed by this design can realize that the nozzle designed therein does not need to be frosted, and at the same time avoids the situation where the circumferential matching accuracy between the nozzle mounting hole requires high-precision matching, that is, as long as the step portion can be stuck in the step groove, the complexity of the nozzle design structure is greatly reduced. At the same time, since the nozzle and the nozzle mounting hole are matched through the step portion and the step groove, the liquid entering the atomizer head can be sealed by the end face between the side of the step portion and the side groove wall of the step groove, so as to prevent the liquid from leaking sideways in the atomizer head, thereby avoiding the situation where the atomizer head is unreliable due to the aging of the sealing ring when the sealing ring is used in the existing method.

[0014] The utility model is further configured such that the angle between the axis of the spray hole of the nozzle and the overall center line of the nozzle is 3 to 10 degrees. Through the above configuration, the distribution position of the axis of the spray hole of the nozzle can be reliably tilted with respect to the overall center line of the nozzle, which further ensures that after the nozzle is installed, it can be reliably set upward or downward, thereby further ensuring that the spray has a large axial range and can make full use of the upper space of the desulfurization tower.

[0015] The utility model is further configured such that the nozzle is of a structure that is large inside and small outside. Through the above configuration, reliable cooperation between the nozzle and the nozzle sleeve can be ensured, and accidental disengagement is not likely to occur after being inserted.

[0016] The utility model is further configured such that the nozzle and the guide block are made of hard alloy, and the nozzle sleeve is made of stainless steel. Through the above configuration, since the nozzle and the guide block are the positions where the flow velocity is the largest and the impact is the most violent during the use stage of the atomizing head, by making them of hard alloy, the wear resistance of the atomizing head can be greatly improved, and the service life of the atomizing head can also be improved to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a side view schematic diagram of an atomizing head of a specific embodiment of the utility model;

[0018] Figure 2 It is a half-section schematic diagram of an atomizing head of a specific embodiment of the utility model;

[0019] Figure 3 It is a half-section schematic diagram of the bottom shell of a specific embodiment of the utility model;

[0020] Figure 4 yes Figure 1 AA cross-sectional view of ;

[0021] Figure 5 yes Figure 4 An enlarged schematic diagram of

[0022] Figure 6 It is a side view schematic diagram of the positioning cylinder in a specific embodiment of the utility model;

[0023] Figure 7 It is a bottom view schematic diagram of the positioning cylinder in a specific embodiment of the utility model;

[0024] Figure 8 It is a half-section schematic diagram of a nozzle of a specific embodiment of the utility model;

[0025] Fig. 9 yes Figure 8 Schematic diagram of CC cross-section;

[0026] Fig.10 yes Figure 8 BB cross-sectional view. DETAILED DESCRIPTION

[0027] like Figure 1-10 As shown, the specific embodiment of the utility model is an atomizing head of a high-speed centrifugal atomizer, comprising a bottom shell 1, a transmission shaft 5, a guide block 7, a nozzle 2 having a liquid spray hole 211, and a top cover 3 which is arranged on the bottom shell 1 and is adapted and has a liquid introduction port 31, the transmission shaft 5 passes through the bottom shell 1 and the top cover 3, the bottom shell 1 and the top cover 3 are connected with the transmission shaft 5, and perform synchronous rotation with the transmission 5, and form a nozzle 2 to spray the liquid circumferentially, and a nozzle 2 is provided on the side wall of the bottom shell 1 for the nozzle 2 to be placed The nozzle mounting hole 11 is distributed in the bottom shell 1, and the guide block 7 is sleeved on the transmission shaft 5 and performs axial limit, and a liquid guide portion 71 is formed on the guide block 7, through which the liquid entering the bottom shell 1 through the liquid inlet 31 is guided to the nozzle 2, there are a plurality of nozzle mounting holes 11, and they are evenly distributed on the side wall of the bottom shell 1, and the direction of the liquid spray hole 211 of the nozzle 2 placed in the nozzle mounting hole 11 includes upward and downward.

[0028] By adopting two settings of the nozzle 2 in the atomizing head, one facing upward and the other facing downward, the spray angle of the nozzle 2 is changed, that is, the upper space of the desulfurization tower is fully utilized, so that when the feed liquid is sprayed, the axial range of the spray of the atomizing head is larger, and the mass transfer and heat transfer effect of the spray drying is better, thereby making the desulfurization effect of the high-speed centrifugal atomizer better. At the same time, during the working process of the atomizing head, the bottom shell 1, the top plate and the internal components can be rotated synchronously by rotating the transmission shaft 5, that is, the high-speed rotation stage, which produces a huge centrifugal force, driving the feed liquid into the bottom shell 1 through the feed liquid inlet 31 and sprayed out through the nozzle 2. After the high-speed liquid flow interacts with the airflow, the feed liquid is stretched, oscillated, and broken into a mist distribution, and then mass transfer and heat transfer are carried out with the flue gas, thereby completing the desulfurization operation.

[0029] The upward and downward liquid spray holes 211 disposed on the side wall of the bottom shell 1 are arranged at intervals in the circumferential direction on the side wall of the bottom shell 1 .

[0030] The nozzle 2 comprises a nozzle pipe 11 and a nozzle sleeve 22 . The nozzle sleeve 22 is sleeved on the outside of the nozzle pipe 11 , and the liquid spray holes 211 are distributed on the nozzle pipe 11 .

[0031] The above-mentioned atomizing head also includes an inner positioning tube 6, which includes a plurality of material-liquid transition portions 61 opened on the inner positioning tube 6, and a plurality of nozzle baffles 62. The number of the plurality of material-liquid transition portions 61 is adapted to the number of nozzle mounting holes 11 and is evenly distributed on the inner positioning tube 6. The number of the plurality of nozzle baffles 62 is adapted to the number of the plurality of material-liquid transition portions 61, and the plurality of nozzle baffles 62 are distributed one by one in an intermittent manner between the plurality of material-liquid transition portions 61.

[0032] A step portion 222 is formed on the nozzle sleeve 22 at a side away from the nozzle 11, and a step groove 111 adapted to the step portion 222 is formed on the hole wall of the nozzle mounting hole 11. The step portion 222 cooperates with the step groove 111 to prevent the liquid entering the bottom shell 1 from leaking at the nozzle 2, and to limit the movement of the nozzle 2 toward the outside of the bottom shell 1.

[0033] The inner positioning tube 6 is placed into the bottom shell 1, and the plurality of nozzle baffles 62 on the inner positioning tube 6 are distributed between the nozzles 2, so as to shield the step portion 222 on the nozzle 2, limit the plurality of nozzles 2 on the side wall of the bottom shell 1, and constitute the retreat of the plurality of nozzles 2 in the bottom shell 1.

[0034] The angle between the spray hole axis of the nozzle 11 and the overall center line of the nozzle 2 is 3-10 degrees. The nozzle 11 is a large inside and small outside structure. The nozzle 11 and the guide block 7 are made of cemented carbide, and the nozzle sleeve 22 is made of stainless steel.

Claims

1. An atomizing head of a high-speed centrifugal atomizer, comprising a bottom shell, a transmission shaft, a guide block, a nozzle containing a liquid spray hole, and a top cover which is arranged on the bottom shell and adapted to be provided with a liquid introduction port, the transmission shaft passes through the bottom shell and the top cover, the bottom shell and the top cover are connected to the transmission shaft, and perform synchronous rotational motion with the transmission, and form a nozzle to perform a circumferential spraying action of the liquid, the side wall of the bottom shell is provided with a nozzle mounting hole for inserting the nozzle, the guide block is distributed in the bottom shell, and is sleeved on the transmission shaft and performs axial limit, and a liquid guide portion is formed on the guide block, through which the liquid entering the bottom shell through the liquid introduction port is guided to the nozzle, characterized in that: There are a plurality of nozzle mounting holes, which are evenly distributed on the side wall of the bottom shell. The directions of the liquid spray holes of the nozzles placed in the nozzle mounting holes include upward and downward.

2. The atomizing head of the high-speed centrifugal atomizer according to claim 1, characterized in that: The upward and downward liquid spray holes arranged on the side wall of the bottom shell are arranged in a circumferentially spaced manner on the side wall of the bottom shell.

3. The atomizing head of the high-speed centrifugal atomizer according to claim 1 or 2, characterized in that: The nozzle comprises a nozzle pipe and a nozzle sleeve, wherein the nozzle sleeve is arranged outside the nozzle pipe, and the liquid spray holes are distributed on the nozzle pipe.

4. The atomizing head of the high-speed centrifugal atomizer according to claim 3, characterized in that: The atomizing head also includes an inner positioning cylinder, which includes a plurality of material-liquid transition parts and a plurality of nozzle baffles opened on the inner positioning cylinder. The number of the plurality of material-liquid transition parts is adapted to the number of nozzle mounting holes and is evenly distributed on the inner positioning cylinder. The number of the plurality of nozzle baffles is adapted to the number of the plurality of material-liquid transition parts, and the plurality of nozzle baffles are distributed one by one in an interval manner between the plurality of material-liquid transition parts.

5. The atomizing head of the high-speed centrifugal atomizer according to claim 4, characterized in that: A step portion is formed on the nozzle sleeve relative to the side away from the nozzle pipe, and a step groove adapted to the step portion is formed on the hole wall of the nozzle mounting hole. The step portion and the step groove cooperate to prevent the liquid entering the bottom shell from leaking at the nozzle, and constitute a limit for the nozzle to move toward the outside of the bottom shell; The inner positioning tube is placed in the bottom shell, and the nozzle baffles on the inner positioning tube are distributed between the nozzles to form a shield for the stepped portion on the nozzle, to limit the nozzles on the side wall of the bottom shell, and to form a retreat for the nozzles in the bottom shell.

6. The atomizing head of the high-speed centrifugal atomizer according to claim 3, characterized in that: The nozzle is a structure of being large inside and small outside.

7. The atomizing head of the high-speed centrifugal atomizer according to claim 3, characterized in that: The angle between the spray hole axis of the spray pipe and the overall center line of the nozzle is 3-10 degrees.

8. The atomizing head of the high-speed centrifugal atomizer according to claim 3, characterized in that: The nozzle and guide block are made of hard alloy, and the nozzle sleeve is made of stainless steel.

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