A nozzle for preventing coking in waste acid pyrolysis

Abstract

This utility model relates to the field of nozzle technology, specifically a nozzle for preventing coking in waste acid pyrolysis. It includes a nozzle body, a nozzle cap for discharging waste acid liquid, an inner channel for spraying out the waste acid liquid, an inner nozzle pipe for cleaning the nozzle body with compressed air inside the inner channel, an outer ring nozzle pipe for cleaning the nozzle body outside the inner channel, and a cooling channel for cooling the nozzle body outside the outer ring nozzle pipe. This utility model, through its internal channel, inner nozzle, outer ring nozzle, cooling channel, heat-conducting layer, through-hole, pressure sensor, and temperature sensor, solves the problems of existing anti-coking nozzles for waste acid pyrolysis, such as dangerous cleaning processes, high furnace temperatures leading to acid leakage, and operational fluctuations during switching, affecting stable production.

Description

Technical Field

[0001] This utility model relates to the field of nozzle technology, specifically to a nozzle for preventing coking in waste acid pyrolysis. Background Technology

[0002] Waste acid pyrolysis is a crucial process in the entire regeneration unit. The main equipment includes a waste acid pyrolysis furnace, burner, waste sulfuric acid nozzles, and a shell-and-tube heat exchanger. The waste acid pyrolysis furnace is a horizontal cylindrical structure with a Q345R outer shell and a double-layer lining. The parts in contact with the steel outer shell are lined with mullite castable, while the parts in contact with the medium are lined with zirconium-corundum mullite bricks. The waste sulfuric acid nozzle is one of the core pieces of equipment; its atomization effect directly affects the degree of pyrolysis of the waste sulfuric acid. If the atomization effect is poor, undecomposed sulfuric acid will flow to the bottom of the waste acid pyrolysis furnace, causing corrosion and damage to the equipment. Simultaneously, incomplete decomposition of waste sulfuric acid may generate sublimated sulfur, clogging the equipment and forcing a shutdown. Traditional waste sulfuric acid nozzles consist of a nozzle cap, rotor blades, and a nozzle body. When waste sulfuric acid flows through the nozzle, the friction and shearing action between the nozzle body and the rotor blades forms discontinuous fine droplets. Considering the highly corrosive nature of waste sulfuric acid, the nozzles are made of Alloy20 alloy.

[0003] The main problem with existing waste sulfuric acid nozzles is clogging. Because waste sulfuric acid contains a certain amount of organic matter, and the nozzles operate in a furnace at around 1100°C, the low flow rate of waste sulfuric acid and the high furnace temperature cause some hydrocarbons to undergo cracking and condensation reactions in the nozzles, resulting in coking and clogging. Therefore, the nozzles need to be cleaned regularly during production. However, the cleaning process is quite dangerous, as the high furnace temperature can easily cause acid leakage. At the same time, it can cause fluctuations in operation during switching, affecting the stable production of the unit. Therefore, a new type of nozzle for preventing coking in waste acid cracking is needed. Utility Model Content

[0004] The main purpose of this invention is to provide a nozzle for preventing coking in waste acid pyrolysis. This invention solves the problems of existing nozzles for preventing coking in waste acid pyrolysis, such as dangerous cleaning process, high furnace temperature and easy acid leakage, and fluctuations in operation during switching, which affect the stable production of the equipment. This is achieved by setting an inner channel, inner nozzle, outer ring nozzle, cooling channel, heat-conducting layer, through hole, pressure sensor and temperature sensor.

[0005] The technical solution adopted by this utility model to solve its technical problem is a nozzle for preventing coking in waste acid pyrolysis, including a nozzle body, a nozzle cap for discharging waste acid liquid is sleeved on the outside of the nozzle body, an inner channel for spraying out waste acid liquid is provided inside the nozzle body, an inner nozzle pipe for cleaning the nozzle body with compressed air is provided inside the inner channel, an outer ring nozzle pipe for cleaning the nozzle body is provided outside the inner channel, a cooling channel for cooling the nozzle body is provided outside the outer ring nozzle pipe, a heat-conducting layer for transferring heat from inside the nozzle body to the outside is screwed on the outside of the outer ring nozzle pipe, a temperature sensor for detecting the temperature of the nozzle body is screwed on the outside of the nozzle body, a pressure sensor for detecting the pressure inside the nozzle body is screwed on the outside of the nozzle body, and several through holes for heat dissipation are opened on the surface of the nozzle body.

[0006] By adopting the above technical solution, the internal channel structure inside the nozzle body is a solid cone structure, which allows the waste acid liquid to be sprayed outwards. Compressed air in the inner nozzle on the inner side of the internal channel is sprayed outwards. When the system starts and stops, the nozzle is cleaned by high-pressure gas to prevent residual organic waste acid in the nozzle from precipitating out and blocking the channel. At the same time, the compressed air in the outer ring nozzle outside the internal channel is sprayed outwards. The inner and outer ring air shear the intermediate waste acid liquid film and form a pre-film mixing.

[0007] When waste acid is sprayed from the nozzle body, the temperature sensor on the outside of the nozzle body detects the temperature of the nozzle body, and the pressure sensor on the outside of the nozzle body detects the pressure inside the nozzle body. When the values ​​detected by the temperature sensor and the pressure sensor on the outside of the nozzle body exceed the set values, the external controller shuts off the equipment switch, so that the spray gun is interlocked to stop working, to avoid the outer layer of the nozzle body from burning and leaking, and to improve safety performance.

[0008] When the nozzle body is working, the heat-conducting layer outside the inner channel transfers the heat inside the nozzle body to the outside. Then, the cooling water in the cooling channel inside the nozzle body uses medium-pressure soft water as the cooling medium to absorb the heat inside the nozzle body. At the same time, the heat absorbed in the cooling channel is discharged to the outside through the through holes opened on the surface of the nozzle body, thus facilitating the cooling and temperature reduction of the nozzle body.

[0009] Specifically, the nozzle body is equipped with rotor blades that adjust the flow temperature of the waste acid liquid.

[0010] By adopting the above technical solution, the rotor blades inside the nozzle body make the flow rate and spray effect of the waste acid more uniform and stable.

[0011] Specifically, the thermally conductive layer is made of a thermally conductive sheet.

[0012] By adopting the above technical solution, the heat-conducting layer on the outer ring nozzle inside the nozzle body is made of heat-conducting sheet. The heat-conducting sheet transfers the heat inside the nozzle body to the outside, thereby facilitating the cooling and temperature reduction of the nozzle body.

[0013] Specifically, the nozzle body is fitted with a rubber sleeve to protect the nozzle body.

[0014] By adopting the above technical solution, the rubber sleeve on the outside of the nozzle body protects the nozzle body.

[0015] Specifically, the input terminals of both the pressure sensor and the temperature sensor are electrically connected to the power supply terminal of an external power source.

[0016] By adopting the above technical solution and connecting to an external power source, the electrical equipment can operate normally.

[0017] The beneficial effects of this utility model are:

[0018] (1) The nozzle for preventing coking of waste acid pyrolysis described in this utility model has a solid cone structure in the inner channel of the nozzle body, so that the waste acid liquid is sprayed outward and the compressed air in the inner nozzle on the inner side of the inner channel is sprayed outward. When the system is started and stopped, the nozzle is cleaned by high pressure gas to prevent the residual organic waste acid in the nozzle from precipitating and blocking the channel. At the same time, the compressed air in the outer ring nozzle outside the inner channel is sprayed outward. The inner and outer ring air shears the intermediate waste acid liquid film and forms a pre-film mixing.

[0019] (2) The present invention describes a nozzle for preventing coking of waste acid pyrolysis. When the waste acid liquid is sprayed out from the nozzle body, the temperature sensor outside the nozzle body detects the temperature of the nozzle body, and the pressure sensor outside the nozzle body detects the pressure inside the nozzle body. When the values ​​detected by the temperature sensor and the pressure sensor outside the nozzle body exceed the set values, the external controller shuts off the equipment switch, so that the spray gun is interlocked to stop working, avoiding the outer layer of the nozzle body from burning and leaking, and improving the safety performance.

[0020] (3) The present invention describes a nozzle for preventing coking of waste acid pyrolysis. When the nozzle body is working, the heat-conducting layer outside the inner channel transfers the heat inside the nozzle body to the outside. Then, the cooling water in the cooling channel inside the nozzle body uses medium-pressure soft water as the cooling medium to absorb the heat inside the nozzle body. At the same time, the heat absorbed in the cooling channel is discharged to the outside through the through hole opened on the surface of the nozzle body, thereby facilitating the cooling and temperature reduction of the nozzle body. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1This is a schematic diagram of the overall structure of a nozzle for preventing coking in waste acid pyrolysis according to the present invention.

[0023] Figure 2 This is a schematic diagram of the internal structure of a nozzle for preventing coking in waste acid pyrolysis according to the present invention.

[0024] Figure 3 This is a partial cross-sectional view of the nozzle body of the present invention, which is used for preventing coking in waste acid pyrolysis.

[0025] In the diagram: 1. Nozzle body; 2. Temperature sensor; 3. Pressure sensor; 4. Heat-conducting layer; 5. Nozzle cap; 6. Rotor blade; 7. Cooling channel; 8. Outer ring nozzle; 9. Inner channel; 10. Inner nozzle; 11. Through hole; 12. Rubber sleeve. Detailed Implementation

[0026] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0027] In order to clean the inside of the nozzle body 1, as an embodiment of this utility model, such as Figure 1 , Figure 2 and Figure 3 As shown, the present invention discloses a nozzle for preventing coking in waste acid pyrolysis, comprising a nozzle body 1, a nozzle cap 5 for discharging waste acid liquid fitted on the outside of the nozzle body 1, an inner channel 9 for spraying out waste acid liquid inside the nozzle body 1, an inner nozzle pipe 10 for cleaning the nozzle body 1 with compressed air inside the inner channel 9, an outer ring nozzle pipe 8 for cleaning the nozzle body 1 outside the inner channel 9, a cooling channel 7 for cooling the nozzle body 1 outside the outer ring nozzle pipe 8, a heat-conducting layer 4 for transferring heat from inside the nozzle body 1 to the outside of the outer ring nozzle pipe 8, a temperature sensor 2 for detecting the temperature of the nozzle body 1 fixed on the outside of the nozzle body 1 by screws, a pressure sensor 3 for detecting the pressure inside the nozzle body 1 fixed on the outside of the nozzle body 1 by screws, and several through holes 11 for heat dissipation on the surface of the nozzle body 1.

[0028] During use, the inner channel 9 inside the nozzle body 1 has a solid cone structure, which allows the waste acid to be sprayed outward. Compressed air in the inner nozzle 10 inside the inner channel 9 is sprayed outward. When the system starts and stops, the nozzle is cleaned by high-pressure gas to prevent residual organic waste acid in the nozzle from precipitating and clogging the channel. At the same time, compressed air in the outer ring nozzle 8 outside the inner channel 9 is sprayed outward. The inner and outer ring air shear the intermediate waste acid film and form a pre-film mixing.

[0029] When waste acid is sprayed from the nozzle body 1, the temperature sensor 2 on the outside of the nozzle body 1 detects the temperature of the nozzle body 1, and at the same time, the pressure sensor 3 on the outside of the nozzle body 1 detects the pressure inside the nozzle body 1. When the values ​​detected by the temperature sensor 2 and the pressure sensor 3 on the outside of the nozzle body 1 exceed the set values, the external controller shuts off the equipment switch, so that the spray gun interlocks and stops working, to prevent the outer layer of the nozzle body 1 from burning and leaking, and to improve safety performance.

[0030] When the nozzle body 1 is working, the heat-conducting layer 4 outside the inner channel 9 transfers the heat inside the nozzle body 1 to the outside. Then, the cooling water in the cooling channel 7 inside the nozzle body 1 uses medium-pressure soft water as the cooling medium to absorb the heat inside the nozzle body 1. At the same time, the heat absorbed in the cooling channel 7 is discharged to the outside through the through hole 11 opened on the surface of the nozzle body 1, thereby facilitating the cooling and temperature reduction of the nozzle body 1.

[0031] To achieve a more uniform and stable flow rate and spraying effect of the waste acid, for example, such as Figure 2 As shown, the present invention also includes a rotor blade 6 inside the nozzle body 1 to adjust the flow temperature of the waste acid liquid.

[0032] When in use, the rotor blades 6 inside the nozzle body 1 make the flow rate and spray effect of the waste acid more uniform and stable.

[0033] For example, to cool down the nozzle body 1, such as... Figure 3 As shown, the present invention also includes a thermally conductive layer 4 made of a thermally conductive sheet.

[0034] During use, the heat-conducting layer 4 on the outer ring nozzle 8 inside the nozzle body 1 is made of heat-conducting sheet. The heat-conducting sheet transfers the heat inside the nozzle body 1 to the outside, thereby facilitating the cooling and temperature reduction of the nozzle body 1.

[0035] To protect the nozzle body 1, for example, such as Figure 1 As shown, the present invention also includes a rubber sleeve 12 that protects the nozzle body 1.

[0036] During use, the rubber sleeve 12 outside the nozzle body 1 protects the nozzle body 1.

[0037] For electrical equipment to function properly, for example, such as Figure 1 As shown, the present invention also includes that the input terminals of the pressure sensor 3 and the temperature sensor 2 are both electrically connected to the power supply terminal of an external power source.

[0038] When in use, the electrical equipment works normally by connecting to an external power source.

[0039] When in use, the inner channel 9 inside the nozzle body 1 has a solid cone structure, which allows the waste acid liquid to be sprayed outward. Compressed air in the inner nozzle 10 inside the inner channel 9 is sprayed outward. When the system is started and stopped, the nozzle is cleaned by high-pressure gas to prevent residual organic waste acid in the nozzle from precipitating and clogging the channel. At the same time, the compressed air in the outer ring nozzle 8 outside the inner channel 9 is sprayed outward. The inner and outer ring air shear the intermediate waste acid liquid film to form a pre-film mixing.

[0040] When waste acid is sprayed from the nozzle body 1, the temperature sensor 2 on the outside of the nozzle body 1 detects the temperature of the nozzle body 1, and at the same time, the pressure sensor 3 on the outside of the nozzle body 1 detects the pressure inside the nozzle body 1. When the values ​​detected by the temperature sensor 2 and the pressure sensor 3 on the outside of the nozzle body 1 exceed the set values, the external controller shuts off the equipment switch, so that the spray gun interlocks and stops working, to prevent the outer layer of the nozzle body 1 from burning and leaking, and to improve safety performance.

[0041] When the nozzle body 1 is working, the heat-conducting layer 4 outside the inner channel 9 transfers the heat inside the nozzle body 1 to the outside. Then, the cooling water in the cooling channel 7 inside the nozzle body 1 uses medium-pressure soft water as the cooling medium to absorb the heat inside the nozzle body 1. At the same time, the heat absorbed in the cooling channel 7 is discharged to the outside through the through hole 11 opened on the surface of the nozzle body 1, which facilitates the cooling and temperature reduction of the nozzle body 1.

[0042] The nozzle body 1 is equipped with a rotor blade 6, which makes the flow rate and spray effect of the waste acid more uniform and stable.

[0043] The heat-conducting layer 4 on the outer ring nozzle 8 inside the nozzle body 1 is made of heat-conducting sheet. The heat-conducting sheet transfers the heat inside the nozzle body 1 to the outside, thereby facilitating the cooling and temperature reduction of the nozzle body 1.

[0044] The rubber sleeve 12 outside the nozzle body 1 protects the nozzle body 1.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A coking resistant nozzle for cracking of spent acid, characterized in that, The nozzle body includes a nozzle body (1), a nozzle cap (5) for discharging waste acid is sleeved on the outside of the nozzle body (1), an inner channel (9) for spraying out waste acid is provided inside the nozzle body (1), an inner nozzle pipe (10) for cleaning the nozzle body (1) with compressed air is provided inside the inner channel (9), an outer ring nozzle pipe (8) for cleaning the nozzle body (1) is provided outside the inner channel (9), a cooling channel (7) for cooling the nozzle body (1) is provided outside the outer ring nozzle pipe (8), a heat-conducting layer (4) for transferring heat from the nozzle body (1) to the outside is fixed with screws on the outside of the outer ring nozzle pipe (8), a temperature sensor (2) for detecting the temperature of the nozzle body (1) is fixed with screws on the outside of the nozzle body (1), a pressure sensor (3) for detecting the pressure inside the nozzle body (1) is fixed with screws on the outside of the nozzle body (1), and a number of through holes (11) for heat dissipation are opened on the surface of the nozzle body (1).

2. The anti-coking nozzle for waste acid pyrolysis according to claim 1, characterized in that, The nozzle body (1) is equipped with a rotor blade (6) to adjust the flow temperature of the waste acid liquid.

3. The anti-coking nozzle for waste acid pyrolysis according to claim 1, characterized in that, The heat-conducting layer (4) is made of a heat-conducting sheet.

4. The anti-coking nozzle for waste acid pyrolysis according to claim 1, characterized in that, The nozzle body (1) is covered with a rubber sleeve (12) to protect the nozzle body (1).

5. A nozzle for preventing coking in waste acid pyrolysis according to claim 1, characterized in that, The input terminals of both the pressure sensor (3) and the temperature sensor (2) are electrically connected to the power supply terminal of an external power source.

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