Acid burning device for preparing regenerated sulfuric acid from waste acid and burning waste alkane

Abstract

The utility model discloses an acid burning device for preparing regenerated sulfuric acid by blending with waste alkane from waste acid, which relates to the technical field of waste acid preparation, and comprises an incinerator, a natural gas inlet pipeline and an air inlet pipeline, a spray head is arranged at the discharging end of the feeding pipeline and discharges materials into the incinerator, the spray head comprises a spray base and a nozzle, and a static mixer is arranged on the feeding pipeline in the feeding conveying direction. The feeding end of the feeding pipeline is communicated with a waste alkane inlet pipeline and a waste acid inlet pipeline. On the basis of the existing structure, a set of waste alkane blending combustion structure is added, and the waste acid spray head is further improved, so that waste alkane becomes acid combustion fuel, the spray nozzle of the waste acid spray head can be locally replaced, the comprehensive utilization rate is improved, and meanwhile, the cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste acid preparation, in particular to an acid burning device for co-burning waste alkanes in the preparation of regenerated sulfuric acid from waste acid. Background Technique

[0002] In the production process of sulfonic acid rust inhibitors, sulfuric acid is commonly used as a sulfonating agent. After the sulfonation reaction, a certain amount of waste sulfuric acid will be generated. The existing main recycling method is to recycle it for the production of regenerated sulfuric acid. Since the concentration of waste sulfuric acid is relatively low, the impurity content is relatively high and most of them contain organic substances, a waste acid incinerator is required for high-temperature incineration. In the production process of sulfonic acid rust inhibitors, a small amount of waste alkanes will also be generated. The existing technology is to carry out environmental protection treatment on the waste alkanes and then discharge them, without better comprehensive utilization of the waste alkanes.

[0003] At the same time, the waste acid nozzle is a key part of the acid burning furnace. It not only has to withstand a thousand degrees of high temperature, but also withstand the high-temperature corrosion and high-speed friction of strong acid, and must maintain a certain geometric shape to ensure the uniformity of spraying. The existing waste acid nozzles have a short service life and a high overall replacement cost.

[0004] Therefore, in view of the above problems, we provide an acid burning device for co-burning waste alkanes in the preparation of regenerated sulfuric acid from waste acid. Content of the Utility Model

[0005] The purpose of the utility model is to provide an acid burning device for co-burning waste alkanes in the preparation of regenerated sulfuric acid from waste acid, which improves the existing waste acid preparation regenerated sulfuric acid system, improves the waste utilization rate and saves costs at the same time.

[0006] To achieve the above purpose, the utility model provides the following technical solution: An acid burning device for co-burning waste alkanes in the preparation of regenerated sulfuric acid from waste acid, including an incinerator, a natural gas inlet pipeline and an air inlet pipeline. The natural gas inlet pipeline and the air inlet pipeline are both connected to the incinerator to convey natural gas and air into the incinerator. The incinerator is connected to a feed pipeline, and the outlet end of the feed pipeline is provided with a nozzle to discharge materials into the incinerator. The nozzle includes a nozzle seat and a nozzle. The nozzle seat is fixed on the feed pipeline, and the nozzle is embedded and fixed on the nozzle seat. A static mixer is arranged on the feed pipeline along the feed conveying direction;

[0007] The inlet end of the feed pipeline is connected to a waste alkane inlet pipeline and a waste acid inlet pipeline. The waste alkane inlet pipeline and the waste acid inlet pipeline are arranged in parallel. A conveying pump one and an electromagnetic control valve one are arranged on the waste alkane inlet pipeline in sequence along the feed conveying direction. A conveying pump two and an electromagnetic control valve two are arranged on the waste acid inlet pipeline in sequence along the feed conveying direction.

[0008] Preferably, the air inlet pipeline is connected to a fan and the air is supplied by the fan.

[0009] Preferably, an oxygen analyzer probe is provided on the flue gas pipeline of the incinerator. The oxygen analyzer probe outputs a signal to the PLC controller. The output end of the PLC controller is signal-connected to the frequency converter, and the output end of the frequency converter is signal-connected to the fan.

[0010] Preferably, a temperature measuring device is provided on the incinerator. The temperature measuring device outputs a signal to the PLC controller. The output end of the PLC controller is signal-connected to the combustion controller.

[0011] Preferably, a natural gas solenoid valve is provided on the natural gas inlet pipeline. The output end of the combustion controller is signal-connected to the natural gas solenoid valve.

[0012] Preferably, the temperature measuring device is a thermocouple sensor.

[0013] Preferably, the part of the nozzle embedded in the nozzle seat is fixed by screwing.

[0014] The utility model has the following beneficial effects:

[0015] 1. On the basis of the existing structure, a structure for co-incinerating waste alkanes is added, including a waste alkane inlet pipeline and a static mixer. The waste alkanes are mixed with waste acid for incineration, making the waste alkanes a fuel for acid burning, which can reduce the energy consumption of the acid burning device and at the same time achieve the environmental protection treatment of waste alkanes.

[0016] 2. The interconnection control of the furnace temperature measuring device and the natural gas flow is increased, and the interconnection control of the oxygen analyzer and the inlet air flow is increased.

[0017] 3. The waste acid nozzle adopts an inlaid structure, which can be partially replaced at low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 is a schematic diagram of the nozzle structure of the utility model.

[0020] In the figure: 1. Incinerator; 101. Flue gas pipeline; 2. Natural gas inlet pipeline; 3. Inlet air pipeline; 4. Feed pipeline; 5. Nozzle; 501. Nozzle seat; 502. Nozzle; 7. Static mixer; 8. Waste alkane inlet pipeline; 9. Waste acid inlet pipeline; 10. Delivery pump one; 11. Solenoid valve one; 12. Delivery pump two; 13. Solenoid valve two; 14. Fan; 15. Oxygen analyzer probe; 16. PLC controller; 17. Frequency converter; 18. Temperature measuring device; 19. Combustion controller; 20. Natural gas solenoid valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0022] As Figure 1-2 shown, the present utility model provides a technical solution: a waste acid burning device for co-burning waste alkanes to produce regenerated sulfuric acid, including an incinerator 1, a natural gas inlet pipeline 2 and an air inlet pipeline 3. The natural gas inlet pipeline 2 and the air inlet pipeline 3 are both connected to the incinerator 1 to transport natural gas and air into the incinerator 1. The incinerator 1 is connected to a feed pipeline 4, and a nozzle 5 is arranged at the discharge end of the feed pipeline 4 to discharge materials into the incinerator 1. The nozzle 5 includes a nozzle seat 501 and a nozzle 502. The nozzle seat 501 is fixed on the feed pipeline 4, and the nozzle 502 is embedded and fixed on the nozzle seat 501. The part of the nozzle 502 embedded in the nozzle seat 501 is fixed by screwing. The material of the nozzle 502 is C-276 Hastelloy with excellent corrosion resistance. A static mixer 7 is arranged on the feed pipeline 4 along the feed conveying direction;

[0023] The feed end of the feed pipeline 4 is connected to a waste alkane inlet pipeline 8 and a waste acid inlet pipeline 9. The waste alkane inlet pipeline 8 and the waste acid inlet pipeline 9 are arranged in parallel. A feed pump one 10 and an electromagnetic control valve one 11 are arranged on the waste alkane inlet pipeline 8 in sequence along the feed conveying direction. A feed pump two 12 and an electromagnetic control valve two 13 are arranged on the waste acid inlet pipeline 9 in sequence along the feed conveying direction. The waste alkane and the waste acid are mixed by the static mixer 7 for incineration, so that the waste alkane becomes the acid burning fuel, which can reduce the energy consumption of the acid burning device and at the same time realize the environmental protection treatment of the waste alkane;

[0024] The air inlet pipeline 3 is connected to a blower 14 for air supply by the blower 14. An oxygen analyzer probe 15 is arranged on the flue gas pipeline 101 of the incinerator 1. The oxygen analyzer probe 15 outputs a signal to a PLC controller 16. The output end of the PLC controller 16 is signal-connected to a frequency converter 17. The output end of the frequency converter 17 is signal-connected to the blower 14 to increase the interconnection control of the oxygen analyzer and the air inlet flow;

[0025] A temperature measuring device 18 is arranged on the incinerator 1. The temperature measuring device 18 is a thermocouple sensor. The temperature measuring device 18 outputs a signal to the PLC controller 16. The output end of the PLC controller 16 is signal-connected to a combustion controller 19. A natural gas electromagnetic control valve 20 is arranged on the natural gas inlet pipeline 2. The output end of the combustion controller 19 is signal-connected to the natural gas electromagnetic control valve 20 to increase the interconnection control of the furnace temperature measuring device 18 and the natural gas flow.

[0026] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0027] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An acid-burning device for co-incinerating waste alkanes to prepare regenerated sulfuric acid from waste acid, comprising an incinerator (1), a natural gas inlet pipeline (2) and an air inlet pipeline (3), wherein the natural gas inlet pipeline (2) and the air inlet pipeline (3) are both connected to the incinerator (1) to transport natural gas and air into the incinerator (1), and it is characterized in that: The incinerator (1) is connected to the feed pipeline (4). A nozzle (5) is arranged at the discharge end of the feed pipeline (4) to discharge materials into the incinerator (1). The nozzle (5) includes a nozzle base (501) and a nozzle (502). The nozzle base (501) is fixed on the feed pipeline (4), and the nozzle (502) is fixedly embedded in the nozzle base (501). A static mixer (7) is arranged on the feed pipeline (4) along the feed conveying direction; The feed end of the feed pipeline (4) is connected to the waste alkane inlet pipeline (8) and the waste acid inlet pipeline (9). The waste alkane inlet pipeline (8) and the waste acid inlet pipeline (9) are arranged in parallel. A first transfer pump (10) and a first electromagnetic control valve (11) are sequentially arranged on the waste alkane inlet pipeline (8) along the feed conveying direction. A second transfer pump (12) and a second electromagnetic control valve (13) are sequentially arranged on the waste acid inlet pipeline (9) along the feed conveying direction.

2. The acid burning device for co-incinerating waste alkanes to prepare regenerated sulfuric acid from waste acid according to claim 1, wherein: The air inlet pipeline (3) is connected to a fan (14) for supplying air by the fan (14).

3. The acid burning device for burning waste alkanes in the preparation of regenerated sulfuric acid from waste acid according to claim 2, characterized in that: An oxygen analyzer probe (15) is arranged on the flue gas pipeline (101) of the incinerator (1). The oxygen analyzer probe (15) outputs a signal to a PLC controller (16). The output end of the PLC controller (16) is signal-connected to a frequency converter (17). The output end of the frequency converter (17) is signal-connected to the fan (14).

4. The acid burning device for co-incinerating waste alkanes to prepare regenerated sulfuric acid from waste acid according to claim 3, characterized in that: A temperature measuring device (18) is arranged on the incinerator (1). The temperature measuring device (18) outputs a signal to the PLC controller (16). The output end of the PLC controller (16) is signal-connected to a combustion controller (19).

5. The acid burning device for co-incinerating waste alkanes to prepare regenerated sulfuric acid from waste acid according to claim 4, characterized in that: A natural gas electromagnetic control valve (20) is arranged on the natural gas inlet pipeline (2). The output end of the combustion controller (19) is signal-connected to the natural gas electromagnetic control valve (20).

6. The acid burning device for co-incinerating waste alkanes to prepare regenerated sulfuric acid from waste acid according to claim 4, characterized in that: The temperature measuring device (18) is a thermocouple sensor.

7. An acid burning device for co-burning waste alkanes to prepare regenerated sulfuric acid from waste acid according to claim 1, characterized in that: The part where the nozzle (502) is embedded in the nozzle base (501) is fixed by screwing.

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