Powder spraying system

Abstract

The utility model discloses a powder spraying system which comprises a stock bin, a pressure tank is connected below the stock bin, and a discharge port of the pressure tank is connected with a plurality of sprayers through a second valve group. The second valve group comprises a manual gate valve arranged below the pressure tank, the lower portion of the manual gate valve is connected with an ejector through a second pneumatic ball valve, the ejector is further connected with an air bag through a pipeline and a pipeline, and a first pneumatic ball valve, a flow meter, a pneumatic diaphragm adjusting valve and a first manual ball valve are sequentially arranged on the pipeline in the flowing direction of air; an inlet of the air bag is connected with the pressure stabilizing tank through an air inlet pipe, and the air bag is further connected with the stock bin and the pressure tank through pipelines. The stock bin in the powder spraying system can be directly connected with a powder feeding pipeline of a tank car, and lime powder entering the stock bin is directly conveyed to the furnace wall gun through the pressure tank to be uniformly sprayed into the furnace, so that the lime powder is fully reacted, and the whole process is clean, environment-friendly, convenient and fast.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of steelmaking technology, especially relates to a powder spraying system. BACKGROUND

[0002] In the steelmaking process, it is necessary to add flux such as lime powder to molten iron so as to form slag with impurities in molten iron, facilitate removal, and thus achieve the effect of improving steel purity and quality. After the lime powder is delivered to the steelmaking plant by a tank car, it needs to be added to the steelmaking furnace through a powder spraying system and a furnace wall gun. Therefore, it is of great significance to design an environmentally friendly, convenient and efficient powder spraying system. SUMMARY

[0003] The utility model discloses a powder spraying system to solve the above technical problems.

[0004] The utility model discloses the following technical scheme is adopted to be realized.

[0005] A powder spraying system comprises a stock bin, a pressure tank connected below the stock bin, and a plurality of injectors connected to the discharge port of the pressure tank through a second valve group; the second valve group comprises a manual flashboard valve arranged below the pressure tank, the injectors are further connected to a gas pocket through pipelines and pipes, and a pneumatic ball valve one, a flowmeter, a pneumatic diaphragm regulating valve and a manual ball valve one are sequentially arranged on the pipes in the flow direction of gas; the inlet of the gas pocket is connected to a pressure stabilizing tank through an air inlet pipe, and the gas pocket is further connected to the stock bin and the pressure tank through pipelines.

[0006] Further, the top of the stock bin is provided with a dust remover, a nitrogen filling port, a feeding port, a stock level meter and a stock bin diffuser port; the feeding port is connected to a tank car through a tank car powder conveying pipeline, and a manual butterfly valve is arranged on the tank car powder conveying pipeline; and the nitrogen filling port is connected to the gas pocket.

[0007] Further, the lower part of the stock bin is conical, and a stock bin fluidization arch-breaking air disc is arranged on the outer wall of the lower part.

[0008] Further, a first valve group is arranged between the stock bin and the pressure tank, and the first valve group comprises a manual knife gate valve, a pneumatic knife gate valve and a pneumatic butterfly valve.

[0009] Further, the top of the pressure tank is provided with a pressure tank diffuser port and a pressurizing port, the pressurizing port is connected to the gas pocket through a pipeline, a diffuser valve is arranged at the pressure tank diffuser port, and the diffuser valve is connected to the stock bin diffuser port through a pipeline.

[0010] Further, a weighter is arranged outside the pressure tank.

[0011] Further, a fluidization disc is further arranged at the discharge port of the pressure tank.

[0012] Further, the lower part of the manual plug-in valve is connected with a manual ball valve 2 through a tee joint, and the manual ball valve 2 is connected with a gas pocket through a pipeline.

[0013] Further, the powder spraying system further comprises a plurality of auxiliary blowing pipelines, the auxiliary blowing pipelines are connected with the gas pocket, and an auxiliary blowing hand valve, an auxiliary blowing flowmeter and an auxiliary blowing electromagnetic valve are arranged on the auxiliary blowing pipelines.

[0014] The application has the following beneficial effects.

[0015] The powder spraying system has the advantages that the bin can be directly connected with the tank truck powder conveying pipeline, the lime powder entering the bin is directly conveyed to the furnace wall gun through the pressure tank and is uniformly sprayed into the furnace, so that the lime powder can be fully reacted, the utilization efficiency of raw materials is improved, the whole process is clean, environment-friendly, convenient, fast, efficient and practical. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a front view of the utility model;

[0017] Figure 2 is a side view of the utility model;

[0018] Figure 3 is a structural schematic view of the utility model;

[0019] Figure 4 is an axonometric view of the utility model;

[0020] Figure 5 is Figure 3 an enlarged view of A part in the figure;

[0021] Figure 6 is Figure 4 an enlarged view of B part in the figure;

[0022] Figure 7 is a bottom view of the utility model;

[0023] Figure 8 is Figure 2 an enlarged view of C part in the figure.

[0024] 1. bin; 2. bin fluidization arch breaking gas disc; 3. first valve group; 31. manual knife gate valve; 32. pneumatic knife gate valve; 33. pneumatic butterfly valve; 34. diffuser valve; 4. pressure tank; 5. weigher; 6. second valve group; 61. gas pocket; 62. pneumatic ball valve 1; 63. flowmeter; 64. pneumatic diaphragm regulating valve; 65. manual ball valve 1; 66. manual plug-in valve; 67. pneumatic ball valve 2; 68. manual ball valve 2; 7. fluidization disc; 8. injector; 9. pressure stabilizing tank; 91. air inlet pipe; 10. tank truck powder conveying pipeline; 11. manual butterfly valve; 12. auxiliary blowing pipeline; 121. auxiliary blowing hand valve; 122. auxiliary blowing flowmeter; 123. auxiliary blowing electromagnetic valve; 13. dust remover. DETAILED DESCRIPTION

[0025] The utility model will be further explained in connection with the drawings and examples.

[0026] As Figures 1-8 shown, a powder spraying system comprises a silo 1, a pressure tank 4 and a pressure stabilizing tank 9, the silo 1 and the pressure tank 4 are installed on a mounting rack, the pressure stabilizing tank 9 is placed on the ground, and the bottom end of the mounting rack is higher than the ground by 7.4 m.

[0027] The silo volume of the silo 1 of the application is 47 m 3 , the use volume is 44 m 3 , the top of the silo 1 is provided with a dust remover 13, a nitrogen charging port, a feeding port, a material level meter, a silo diffusing port, a safety valve, a pressure gauge, a pressure sensor and the like, wherein the feeding port is connected with a tank truck through a tank truck powder conveying pipeline 10, a manual butterfly valve 11 is arranged on the tank truck powder conveying pipeline 10, the free end of the tank truck powder conveying pipeline 10 is connected with the tank truck, and the feeding of the silo can be realized by controlling the manual butterfly valve 11; the nitrogen charging port is connected with a gas pocket 61, nitrogen is injected into the silo 1, and the nitrogen is used for replacing the air in the silo 1; the pressure sensor is used for detecting the pressure of the silo 1, so as to ensure the normal use and accurate control of the system equipment; and the material level meter is used for feeding back the feeding parameters, so as to accurately control the feeding amount.

[0028] The lower part of the silo 1 is conical, and a silo fluidization arch breaking air disc 2 is installed on the conical silo body wall, and the vibration and blowing of the arch breaking air disc can effectively promote the downward flow of the powder material in the silo 1.

[0029] The lower part of the silo 1 is connected with the pressure tank 4, and a first valve group 3 is arranged between the silo 1 and the pressure tank 4, the first valve group 3 comprises a manual knife gate valve 31, a pneumatic knife gate valve 32 and a pneumatic butterfly valve 33, and is used for controlling the powder entering the pressure tank 4.

[0030] The top of the pressure tank 4 is provided with a pressure tank diffusing port, a pressurizing port, a safety valve, a pressure gauge, a pressure sensor and the like, wherein the pressurizing port is connected with the gas pocket 61 through a pipeline; a diffusing valve 34 is arranged at the pressure tank diffusing port, the diffusing valve 34 is connected with the silo diffusing port through a pipeline, and the diffusing port can ensure the smooth feeding of the pressure tank 4 (when the silo 1 feeds the pressure tank 4, the pressure tank needs to be pressure released to feed) ; and the pressure sensor can ensure the normal use and accurate control of the system equipment.

[0031] A weighing device 5 for weighing the weight of the pressure tank 4 is arranged outside the pressure tank 4, the weighing device 5 is arranged on the mounting rack, and the weight data of the material is obtained by calculating the difference between the total weight of the material + the pressure tank and the empty tank of the pressure tank.

[0032] The discharge port of the pressure tank 4 is provided with a fluidizing disc 7, which can increase the flowability of the powder, so that the material can be smoothly discharged.

[0033] Specifically, the second valve group 6 comprises a manual plug valve 66 arranged below the fluidizing disc 7, a manual ball valve two 68 and a pneumatic ball valve two 67 are connected below the manual plug valve 66 through a tee joint, and the pneumatic ball valve two 67 is connected with the ejector 8; the ejector 8 is also connected with the gas pocket 61 through pipelines and pipes, and the pipes are sequentially provided with a pneumatic ball valve one 62, a flowmeter 63, a pneumatic diaphragm regulating valve 64 and a manual ball valve one 65 (the manual ball valve one 65 keeps open state) along the flow direction of the gas; the gas in the gas pocket 61 enters the ejector 8 through the pipelines and pipes, and the powder is sprayed out under the auxiliary action of the gas; the manual ball valve two 68 is connected with the gas pocket 61 through a pipeline, and in the normal working state, the manual ball valve two 68 is closed; if the powder is blocked during discharging, the manual ball valve two 68 can be opened, and the gas in the gas pocket 61 can assist in dredging the discharging pipeline.

[0034] The gas inlet of the gas pocket 61 is connected with the pressure stabilizing tank 9 through a gas inlet pipe 91, and a pressure gauge is arranged on the gas inlet pipe 91; the pressure stabilizing tank 9 is used for providing nitrogen for the gas pocket 61; the gas pocket 61 is also connected with the silo 1 and the pressure tank 4 through pipelines; specifically, the gas pocket 61 is connected with the nitrogen charging port of the silo 1 through a pipeline, and the gas pocket 61 is connected with the pressurizing port of the pressure tank 4 through a pipeline, and is used for pressurizing the pressure tank 4.

[0035] The powder spraying system also comprises a plurality of auxiliary blowing pipelines 12, the auxiliary blowing pipelines 12 are connected with the gas pocket 61, and the auxiliary blowing pipelines 12 are provided with an auxiliary blowing hand valve 121, an auxiliary blowing flowmeter 122 and an auxiliary blowing electromagnetic valve 123; the auxiliary blowing pipelines can assist the main blowing pipeline to blow the lime powder into the molten iron, and improve the depth of the lime powder into the liquid surface.

[0036] The use method of the utility model is as follows:

[0037] 1, the silo is added: the charging port is connected with the tank car, after the tank car is provided with conditions, the dust remover 13 and the sealing butterfly valve on the top of the silo 1 are opened, the charging is stopped according to the feedback parameter of the material level meter, the charging butterfly valve is closed, the nitrogen charging valve is opened, and after a specified time, the dust remover 13 and the sealing butterfly valve are closed;

[0038] 2, pressure tank feeding: dust collector 13 and sealing butterfly valve open, pressure tank diffuser valve open, open hand knife gate valve 31, pneumatic knife gate valve 32, pneumatic butterfly valve 33, open silo fluidization arch breaking air dish 2, according to the pressure tank weighing display, close silo fluidization arch breaking air dish 2, close hand knife gate valve 31, pneumatic knife gate valve 32, pneumatic butterfly valve 33, close pressure tank diffuser, pressure tank 4 starts to pressurize; At the same time, the silo closes the dust collector 13 and the sealing butterfly valve, and the nitrogen filling port is automatically started and stopped according to the silo pressure setting;

[0039] 3, blowing: the pressure tank 4 is completed, the fluidization is opened, the main blowing pipe valve is opened, the ceramic ball valve is opened, and the ceramic ball valve opening degree is matched with the main blowing film regulating valve opening.

[0040] The embodiments of the specific implementation mode are the preferred embodiments of the utility model, not limited by this, and the protection scope of the utility model is limited, so: all equivalent changes made according to the structure, shape and principle of the utility model should be covered in the protection scope of the utility model.

Claims

1. A powder spraying system characterized by: The application relates to a powder injection system, which comprises a powder bin (1), a pressure tank (4) connected below the powder bin (1), and a plurality of injectors (8) connected to the discharge port of the pressure tank (4) through a second valve group (6); the second valve group (6) comprises a manual gate valve (66) arranged below the pressure tank (4), the lower part of the manual gate valve (66) is connected to the injectors (8) through a pneumatic ball valve (67), the injectors (8) are also connected to a gas pocket (61) through pipelines and pipes, and the pipes are sequentially provided with a pneumatic ball valve (62), a flowmeter (63), a pneumatic diaphragm regulating valve (64) and a manual ball valve (65) along the flow direction of the gas; the inlet of the gas pocket (61) is connected to a pressure stabilizing tank (9) through a gas inlet pipe (91), and the gas pocket (61) is also connected to the powder bin (1) and the pressure tank (4) through pipelines.

2. A duster system according to claim 1, characterized in that: The top of the powder bin (1) is provided with a dust remover (13), a nitrogen filling port, a feeding port, a material level meter and a powder bin diffusing port; the feeding port is connected to a tank truck through a tank truck powder conveying pipeline (10), and the tank truck powder conveying pipeline (10) is provided with a manual butterfly valve (11); and the nitrogen filling port is connected to the gas pocket (61).

3. A duster system according to claim 1, wherein: The lower part of the powder bin (1) is conical, and a powder bin fluidization arch-breaking air disc (2) is arranged on the outer wall of the lower part.

4. A duster system according to claim 1, wherein: A first valve group (3) is arranged between the powder bin (1) and the pressure tank (4), and the first valve group (3) comprises a manual knife gate valve (31), a pneumatic knife gate valve (32) and a pneumatic butterfly valve (33).

5. A duster system according to claim 1, wherein: The top of the pressure tank (4) is provided with a pressure tank diffusing port and a pressurizing port, the pressurizing port is connected to the gas pocket (61) through a pipeline, and the diffusing port is provided with a diffusing valve (34) connected to the powder bin diffusing port through a pipeline.

6. A duster system according to claim 1, wherein: A weighter (5) is arranged outside the pressure tank (4).

7. A duster system according to claim 1, wherein: A fluidization disc (7) is further arranged at the discharge port of the pressure tank (4).

8. A duster system according to claim 1, wherein: A manual ball valve (68) is further connected to the lower part of the manual gate valve (66) through a tee joint, and the manual ball valve (68) is connected to the gas pocket (61) through a pipeline.

9. A duster system according to claim 1, wherein: The powder injection system further comprises a plurality of auxiliary blowing pipelines (12), the auxiliary blowing pipelines (12) are connected to the gas pocket (61), and the auxiliary blowing pipelines (12) are provided with an auxiliary blowing hand valve (121), an auxiliary blowing flowmeter (122) and an auxiliary blowing electromagnetic valve (123).

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