A waste acid cracking furnace

Abstract

The invention relates to the technical field of waste acid cracking treatment equipment, in particular to a waste acid cracking furnace, comprising a cracking furnace body, an air inlet arranged on the cracking furnace body and a mixing tank, wherein a mixing module is rotatably arranged in the inner cavity of the mixing tank, and a waste acid delivery pump group drives the mixing module to quickly mix the natural gas and oxygen in the mixing tank, while the mixing module can drive an oxygen intake module and a natural gas intake module to quantitatively transport oxygen and natural gas into the mixing tank through a reciprocating drive module, and when the speed of the waste acid delivery pump group increases and the injection amount of the waste acid increases, the reciprocating speed of the oxygen intake module and the natural gas intake module driven by the reciprocating drive module will increase accordingly, and the amount of oxygen and natural gas transported to the mixing tank by the oxygen intake module and the natural gas intake module per unit time will also increase accordingly, and the intake amount of natural gas and oxygen can be automatically adjusted according to the injection amount of the waste acid to maintain a proper reaction temperature and oxygen content.

Description

Technical Field

[0001] The invention relates to the technical field of waste acid cracking treatment equipment, and in particular to a waste acid cracking furnace. Background Art

[0002] Concentrated sulfuric acid is a chemical raw material that is widely used in industry. A large amount of waste sulfuric acid will inevitably be produced during the use of industrial sulfuric acid. For example, in the production of alkylated oil, most of the sulfuric acid is used as a catalyst, which will produce a large amount of waste sulfuric acid containing impurities such as sulfate esters, acid-soluble oils, and water. This waste acid is red and black in color, and not only has an unpleasant odor, but also has a high sulfuric acid concentration and high viscosity. Once released into the environment, it will cause extremely serious damage to the environment. At present, high-temperature cracking is generally carried out in a cracking furnace.

[0003] Waste acid cracking furnaces often use natural gas as cracking fuel. Natural gas is mixed with oxygen and ignited to release heat to crack waste sulfuric acid. During the cracking process, cracking temperature, oxygen content, and waste acid spraying amount are all important control factors. Among them, the oxygen content in the furnace gas has an important influence on whether the waste acid is completely cracked, whether the natural gas is fully burned, and whether the organic matter is completely oxidized. When the free oxygen content in the furnace gas is lower than 2% by volume, the organic matter in the waste sulfuric acid cannot be completely burned, and part of the SO2 in the furnace gas may be reduced to elemental sulfur or sulfur vapor. After entering the subsequent separation and purification system with the furnace gas, it will bring about problems such as scaling and blockage of pipelines and equipment. When the free oxygen content in the furnace gas is too high, the SO3 content in the furnace gas will increase, the amount of acid mist will increase, and the corrosion to the equipment will increase. At the same time, the amount of acid-containing wastewater will increase in the washing and demisting processes, and the sulfuric acid return The yield is reduced accordingly. In order to solve the above problems, the invention with application number 201611050859.9 provides a segmented independent waste acid cracking furnace and a method for cracking waste sulfuric acid, including a combustion section, a waste acid decomposition section and a sulfur trioxide conversion section. Fuel, air or gas is sprayed into the cracking furnace through the fuel spray gun, the air spray gun or the first gas spray gun, and waste sulfuric acid is sprayed into the cracking section of the cracking furnace through the waste acid spray gun. The fuel combustion, waste acid cracking and sulfur trioxide conversion can be controlled separately, so that the reaction temperature and oxygen concentration of each section are in the optimal reaction state. However, the segmented independent waste acid cracking furnace cannot automatically adjust the intake of natural gas and oxygen according to the injection amount of waste acid to maintain the appropriate reaction temperature and oxygen content, and the waste acid is directly sprayed into the furnace body through the nozzle, the acid injection is uneven, and the waste acid cracking effect is poor. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a spent acid cracking furnace.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: a waste acid cracking furnace, comprising a cracking furnace body, an air inlet and a mixing tank arranged on the cracking furnace body, a mixing module is rotatably arranged in the inner cavity of the mixing tank, one end of the mixing module is fixedly connected to a reciprocating drive module, one end of the reciprocating drive module is connected to an oxygen intake module and a natural gas intake module, and the oxygen intake module and the natural gas intake module are fixedly connected, a waste acid delivery pump group is fixedly arranged on one side of the top of the cracking furnace body, a transmission component is connected between one end of the waste acid delivery pump group and the mixing module, one side of the mixing tank is fixedly connected to a natural gas nozzle through a pipe fitting, and a self-spinning waste acid spraying module is fixedly connected to the discharge end of the waste acid delivery pump group, and the waste acid is sprayed through the spin waste acid spraying module While spraying into the main body of the cracking furnace, the reverse thrust during the injection of the waste acid can drive the self-spinning waste acid spraying module to rotate. The self-spinning waste acid spraying module sprays the waste acid while rotating, which can not only make the acid feed uniform, but also stir the injected waste acid when the self-spinning waste acid spraying module rotates, which can further improve the cracking effect. The waste acid delivery pump group delivers the waste acid that needs to be cracked. While the delivered waste acid is sprayed into the main body of the cracking furnace through the self-spinning waste acid spraying module, the transmission component can be linked to drive the mixing module to rotate to quickly mix the natural gas and oxygen in the mixing tank. After the natural gas and oxygen are evenly mixed, they are sprayed from the natural gas nozzle for combustion. The burning flame can be used to quickly mix the waste acid sprayed from the spinning waste acid spraying module. During high-temperature cracking, the waste acid delivery pump group drives the mixing module to quickly mix the natural gas and oxygen in the mixing tank. At the same time, the mixing module can drive the oxygen intake module and the natural gas intake module to quantitatively transport oxygen and natural gas into the mixing tank through the reciprocating drive module. Moreover, when the speed of the waste acid delivery pump group increases and the injection amount of the waste acid increases, the reciprocating speed of the oxygen intake module and the natural gas intake module driven by the reciprocating drive module will increase accordingly, and the amount of oxygen and natural gas transported to the mixing tank per unit time by the oxygen intake module and the natural gas intake module will also increase accordingly. The intake amount of natural gas and oxygen can be automatically adjusted according to the injection amount of the waste acid to maintain the appropriate reaction temperature and oxygen content. One side of the self-spinning waste acid spraying module is located equidistant from the inner cavity of the cracking furnace body. A flow guiding and mixing mechanism is fixedly provided, and an air inlet volume control module is provided on one side of the top of the flow guiding and mixing mechanism. The flow guiding and mixing mechanism can not only improve the flow path of the gas in the cracking furnace and increase the residence time of the waste acid in the cracking furnace, but also mix the gas during the flow guiding process, which can improve the cracking effect. The air inlet volume control module can automatically adjust the size of the air inlet volume at the air inlet of the cracking furnace. When the injection amount of the waste acid, natural gas and oxygen increases, the gas flow rate in the cracking furnace will increase accordingly. The greater the gas flow rate, the greater the offset of the air volume control module under the push of the air flow. At this time, the air inlet volume at the air inlet increases accordingly. On the contrary, when the gas flow rate becomes smaller, the air volume control module automatically resets, and the air inlet can be automatically blocked to reduce the air inlet volume at the air inlet.Appropriate air can be automatically added into the cracking furnace to maintain an appropriate oxygen concentration and improve the conversion rate of the waste acid. An exhaust port is provided at one end of the cracking furnace body away from the mixing tank;

[0006] The reciprocating drive module includes a turntable fixedly arranged at one end of the mixing module, a guide rod is fixedly arranged at one end of the mixing tank on the outer periphery of the turntable, a linkage plate is sleeved on the outer side of the guide rod, a linkage rod is connected between the linkage plate and the turntable, the mixing module can drive the turntable to rotate, and the linkage rod can drive the linkage plate to reciprocate when the turntable rotates, and the reciprocating linkage plate can drive the oxygen intake module and the natural gas intake module to quantitatively transport oxygen and natural gas into the mixing tank, and when the speed of the waste acid delivery pump group increases and the injection amount of the waste acid increases, the reciprocating speed of the oxygen intake module and the natural gas intake module driven by the reciprocating drive module will increase accordingly, and the amount of oxygen and natural gas transported to the mixing tank per unit time by the oxygen intake module and the natural gas intake module will also increase accordingly, and the intake amount of natural gas and oxygen can be automatically adjusted according to the injection amount of the waste acid to maintain the appropriate reaction temperature and oxygen content;

[0007] The oxygen intake module and the natural gas intake module both include a metering housing and a piston rod fixedly arranged on one side of a linkage plate. A metal hard pipe is connected between the outer side of one end of the metering housing and the mixing tank. A first one-way valve is arranged on the metal hard pipe. A piston is fixedly arranged on one end of the piston rod penetrating the inner cavity of the metering housing. An air intake port is arranged at one end of the metering housing. A second one-way valve is arranged on the air intake port. When the reciprocating drive module drives the piston rods on the oxygen intake module and the natural gas intake module to reciprocate, the piston rod cooperates with the piston to respectively transfer oxygen and natural gas through the air intake port. The natural gas is first sucked into the metering shell, and then discharged into the mixing tank through the metal hard pipe fittings. Oxygen and natural gas can be quantitatively delivered to the mixing tank. Moreover, when the speed of the waste acid delivery pump group increases and the injection amount of waste acid increases, the reciprocating motion speed of the oxygen intake module and the natural gas intake module driven by the reciprocating drive module will increase accordingly. The amount of oxygen and natural gas delivered to the mixing tank per unit time by the oxygen intake module and the natural gas intake module will also increase accordingly. The intake amount of natural gas and oxygen can be automatically adjusted according to the injection amount of waste acid to maintain the appropriate reaction temperature and oxygen content.

[0008] Preferably, the mixing module includes a rotating shaft rotatably arranged in the inner cavity of the mixing tank, a set of sleeves are equidistantly fixed on the outside of the rotating shaft, and stirring rods are axially equidistantly fixed on the outside of the set. While the waste acid delivery pump group delivers the waste acid, the rotating shaft on the mixing module can be driven to rotate through the transmission assembly. The rotating shaft can drive the stirring rod to rotate to quickly mix the natural gas and oxygen in the mixing tank. After the natural gas and oxygen are evenly mixed, they are sprayed from the natural gas nozzle for combustion.

[0009] Preferably, the linkage rod includes a rotating kit and a connecting rod, the rotating kit is eccentrically fixed on one side of the turntable and the other side of the linkage plate, universal balls are fixed at both ends of the connecting rod, and the universal balls are arranged in the rotating kit, and the two ends of the connecting rod are movably connected to the turntable and the linkage plate through the rotating kit and the universal balls, so that the linkage plate can be driven to reciprocate when the turntable rotates.

[0010] Preferably, the gas storage ratio of the metering housings on the oxygen intake module and the natural gas intake module is the same as the mixed combustion ratio of oxygen and natural gas.

[0011] Preferably, the waste acid conveying pump group includes a mounting platform fixedly arranged on one side of the cracking furnace body, a driving motor is fixedly arranged on the top of the mounting platform, a pump body is connected to the end of the output shaft of the driving motor, an impeller assembly is arranged in the inner cavity of the pump body, a connecting shaft is fixedly arranged at one end of the impeller assembly, and the driving motor drives the pump body to rotate to convey the waste acid that needs to be cracked. During the conveying, the impeller assembly can drive the transmission assembly to rotate through the connecting shaft, and the transmission assembly can drive the mixing module to rotate to quickly mix the natural gas and oxygen in the mixing tank.

[0012] Preferably, the transmission assembly is composed of a driving pulley fixedly arranged at one end of the connecting shaft and a driven pulley fixedly arranged at one end of the mixing module, and a belt is connected between the driving pulley and the driven pulley.

[0013] Preferably, the self-spinning waste acid spraying module comprises a feed pipe connected to the waste acid delivery pump group, one end of the feed pipe away from the waste acid delivery pump group is rotatably connected to a spray rod through a rotating seal, and the spray rod is rotatably arranged in the inner cavity of the cracking furnace body, an annular collecting box is equidistantly fixedly sleeved on the outside of the spray rod, a waste acid nozzle and a mixing plate are axially equidistantly arranged on the outside of the annular collecting box, and the waste acid nozzle and the mixing plate are staggered and arranged;

[0014] The inner side of the annular collecting box is connected with the spraying rod, and the waste acid spray head is tiltedly arranged on the outer side of the annular collecting box. When the waste acid is sprayed into the cracking furnace body through the spinning waste acid spray module, the reverse thrust during the waste acid spraying can drive the spinning waste acid spray module to rotate. The spinning waste acid spray module sprays the waste acid while rotating, which not only makes the acid feed uniform, but also the sprayed waste acid can be stirred by the mixing plate when the spinning waste acid spray module rotates, which can further improve the cracking effect.

[0015] Preferably, the flow-guiding and mixing mechanism comprises an upper plate and a lower plate, and a mixing plate with air holes is fixedly provided equidistantly between the upper plate and the lower plate. The combustion gas flows in from the bottom end of the flow-guiding and mixing mechanism, is mixed through the mixing plate with air holes, and then flows out from the top end of the flow-guiding and mixing mechanism. The flow-guiding and mixing mechanism can not only improve the flow path of the gas in the cracking furnace and increase the residence time of the waste acid in the cracking furnace, but also mix the gas during the flow-guiding process, thereby improving the cracking effect.

[0016] Preferably, the air inlet control module comprises a slide bar fixedly arranged on the outside of the flow guiding and mixing mechanism, a slide plate and a return spring are sleeved on the outside of the slide bar, and an air inlet blocking component is fixedly connected to the top of the slide plate through a rod member. The air inlet control module can automatically adjust the size of the air inlet at the air inlet of the cracking furnace. When the injection amount of waste acid, natural gas and oxygen increases, the gas flow rate in the cracking furnace will increase accordingly. The greater the gas flow rate, the greater the offset of the air inlet blocking component on the air volume control module under the push of the air flow. At this time, the air inlet at the air inlet increases accordingly. On the contrary, when the gas flow rate becomes smaller, the air inlet blocking component on the air volume control module automatically resets under the action of the return spring, and the air inlet can be automatically blocked to reduce the air inlet at the air inlet, and appropriate air can be automatically added into the cracking furnace to maintain an appropriate oxygen concentration, thereby improving the conversion rate of the waste acid.

[0017] The air inlet blocking assembly is composed of a vertical airflow shielding plate and a blocking plate, and the blocking plate is fixedly arranged on one side of the top end of the vertical airflow shielding plate.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The waste acid delivery pump group delivers the waste acid that needs to be cracked. The delivered waste acid is sprayed into the main body of the cracking furnace through the self-spinning waste acid spraying module. At the same time, the mixing module can be driven to rotate by the transmission component. The mixing module can quickly mix the natural gas and oxygen in the mixing tank. The waste acid delivery pump group drives the mixing module to quickly mix the natural gas and oxygen in the mixing tank. At the same time, the mixing module can drive the oxygen intake module and the natural gas intake module to quantitatively deliver oxygen and natural gas to the mixing tank through the reciprocating drive module. Moreover, when the speed of the waste acid delivery pump group increases and the injection amount of the waste acid increases, the reciprocating speed of the oxygen intake module and the natural gas intake module driven by the reciprocating drive module will increase accordingly, and the amount of oxygen and natural gas delivered to the mixing tank per unit time by the oxygen intake module and the natural gas intake module will also increase accordingly. The intake amount of natural gas and oxygen can be automatically adjusted according to the injection amount of the waste acid to maintain the appropriate reaction temperature and oxygen content.

[0020] 2. While the waste acid is sprayed into the main body of the cracking furnace through the self-spinning waste acid spraying module, the reverse thrust during the waste acid spraying can be used to drive the self-spinning waste acid spraying module to rotate. The self-spinning waste acid spraying module sprays the waste acid while rotating, which can not only spray the waste acid evenly into the main body of the cracking furnace, but also fully stir and mix the sprayed waste acid with the burning flame through the mixing plate thereon when the self-spinning waste acid spraying module rotates, so that the waste acid and the burning flame can be fully contacted, which can effectively improve the heat exchange effect, and further improve the cracking effect of the waste acid.

[0021] 3. The cracking furnace can be divided by the diversion and mixing mechanism, so that the flue gas flow channel in the cracking furnace has a curved structure, which can not only improve the flow path of the gas in the cracking furnace and increase the heat exchange and cracking time of the waste acid in the cracking furnace, but also mix the gas during the diversion process, which can improve the cracking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a cross-sectional structural diagram of the cracking furnace body of the present invention;

[0024] Figure 3 It is a partial cross-sectional structural diagram of one end of the present invention;

[0025] Figure 4 It is a cross-sectional structural diagram of a mixing tank of the present invention;

[0026] Figure 5 It is a cross-sectional structural diagram of the waste acid delivery pump assembly of the present invention;

[0027] Figure 6 This is a structural diagram of the flow guiding and mixing mechanism of the present invention;

[0028] Figure 7 For the present invention Figure 6 A schematic diagram of the enlarged structure in FIG.

[0029] In the figure: 1. Cracking furnace body; 2. Air inlet; 3. Mixing tank; 4. Mixing module; 5. Reciprocating drive module; 6. Oxygen intake module; 7. Natural gas intake module; 8. Waste acid delivery pump group; 9. Transmission assembly; 10. Natural gas nozzle; 11. Spinning waste acid spray module; 12. Diversion and mixing mechanism; 13. Air intake control module; 14. Exhaust port;

[0030] 401, rotating shaft; 402, kit; 403, stirring rod;

[0031] 501, turntable; 502, guide rod; 503, linkage plate; 504, rotating kit; 505, connecting rod; 506, universal ball;

[0032] 601, metering housing; 602, piston rod; 603, metal hard pipe; 604, first one-way valve; 605, piston; 606, air inlet; 607, second one-way valve;

[0033] 801, mounting platform; 802, driving motor; 803, pump body; 804, impeller assembly; 805, connecting shaft;

[0034] 901, driving pulley; 902, driven pulley; 903, belt;

[0035] 1101, material delivery pipe; 1102, spraying rod; 1103, annular header box; 1104, waste acid nozzle; 1105, mixing plate;

[0036] 1201. Upper plate; 1202. Lower plate; 1203. Air mixing plate;

[0037] 1301, sliding rod; 1302, sliding plate; 1303, return spring; 1304, air inlet blocking assembly. DETAILED DESCRIPTION

[0038] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0039] like Figures 1 to 7A waste acid cracking furnace shown in the figure comprises a cracking furnace body 1, an air inlet 2 and a mixing tank 3 arranged on the cracking furnace body 1, a mixing module 4 is rotatably arranged in the inner cavity of the mixing tank 3, the mixing module 4 can quickly mix the natural gas and oxygen in the mixing tank 3, one end of the mixing module 4 is fixedly connected to a reciprocating drive module 5, one end of the reciprocating drive module 5 is connected to an oxygen intake module 6 and a natural gas intake module 7, and the oxygen intake module 6 and the natural gas intake module 7 are fixedly connected, a waste acid delivery pump group 8 is fixedly arranged on one side of the top of the cracking furnace body 1, the waste acid delivery pump group 8 can deliver the waste acid that needs to be cracked, a transmission component 9 is connected between one end of the waste acid delivery pump group 8 and the mixing module 4, and one side of the mixing tank 3 is fixedly connected to a natural gas nozzle 1 through a pipe fitting 0, the discharge end of the waste acid delivery pump group 8 is fixedly connected with a self-spinning waste acid spraying module 11. When the waste acid is sprayed into the cracking furnace body 1 through the self-spinning waste acid spraying module 11, the reverse thrust during the waste acid spraying can be used to drive the self-spinning waste acid spraying module 11 to rotate. The self-spinning waste acid spraying module 11 rotates while spraying the waste acid, which can not only make the acid feed uniform, but also stir the sprayed waste acid when the self-spinning waste acid spraying module 11 rotates, which can further improve the cracking effect. The waste acid delivery pump group 8 delivers the waste acid that needs to be cracked. When the delivered waste acid is sprayed into the cracking furnace body 1 through the self-spinning waste acid spraying module 11, the transmission component 9 can be used to drive the mixing module 4 to rotate to quickly mix the natural gas and oxygen in the mixing tank 3. After the natural gas and oxygen are mixed evenly, they are sprayed out from the natural gas nozzle 10 for combustion. The burning flame can be used to quickly perform high-temperature cracking on the waste acid sprayed from the spinning waste acid spray module 11. The waste acid delivery pump group 8 drives the mixing module 4 to quickly mix the natural gas and oxygen in the mixing tank 3. At the same time, the mixing module 4 can drive the oxygen intake module 6 and the natural gas intake module 7 to quantitatively transport oxygen and natural gas into the mixing tank 3 through the reciprocating drive module 5. Moreover, when the speed of the waste acid delivery pump group 8 increases and the injection amount of the waste acid increases, the reciprocating speed of the oxygen intake module 6 and the natural gas intake module 7 driven by the reciprocating drive module 5 will increase accordingly, and the oxygen transported by the oxygen intake module 6 and the natural gas intake module 7 to the mixing tank 3 per unit time The amount of natural gas will also increase accordingly. The intake amount of natural gas and oxygen can be automatically adjusted according to the injection amount of waste acid to maintain the appropriate reaction temperature and oxygen content. A flow guiding and mixing mechanism 12 is fixedly arranged at one side of the self-spinning waste acid spraying module 11 in the inner cavity of the cracking furnace main body 1 at an equidistant distance. An air intake volume control module 13 is arranged on one side of the top of the flow guiding and mixing mechanism 12. The flow guiding and mixing mechanism 12 can not only improve the flow path of the gas in the cracking furnace and increase the residence time of the waste acid in the cracking furnace, but also mix the gas during the flow guiding process, which can improve the cracking effect. The air intake volume control module 13 can automatically adjust the size of the air intake at the air inlet 2 on the cracking furnace. When the injection amount of waste acid, natural gas and oxygen increases, the gas flow rate in the cracking furnace will increase accordingly.The greater the gas flow rate, the greater the displacement of the air volume control module 13 under the push of the air flow, and the air volume at the air inlet 2 increases accordingly. On the contrary, when the gas flow rate decreases, the air volume control module 13 automatically resets, and the air inlet 2 can be automatically blocked to reduce the air volume at the air inlet 2, and appropriate air can be automatically added to the cracking furnace to maintain an appropriate oxygen concentration and improve the conversion rate of the waste acid. An exhaust port 14 is provided at one end of the cracking furnace body 1 away from the mixing tank 3;

[0040] The reciprocating drive module 5 includes a turntable 501 fixedly arranged at one end of the mixing module 4. A guide rod 502 is fixedly arranged at one end of the mixing tank 3 on the outer periphery of the turntable 501. A linkage plate 503 is sleeved on the outer side of the guide rod 502. A linkage rod is connected between the linkage plate 503 and the turntable 501. The mixing module 4 can drive the turntable 501 to rotate. When the turntable 501 rotates, the linkage plate 503 can be driven to reciprocate through the linkage rod. The reciprocating linkage plate 503 can drive the oxygen intake module 6 and the natural gas intake module 7 to quantitatively transport oxygen and natural gas into the mixing tank 3. Moreover, when the speed of the waste acid delivery pump group 8 increases and the injection amount of the waste acid increases, the reciprocating speed of the oxygen intake module 6 and the natural gas intake module 7 driven by the reciprocating drive module 5 will increase accordingly. The amount of oxygen and natural gas transported to the mixing tank 3 per unit time by the oxygen intake module 6 and the natural gas intake module 7 will also increase accordingly. The intake amount of natural gas and oxygen can be automatically adjusted according to the injection amount of the waste acid to maintain an appropriate reaction temperature and oxygen content.

[0041] The oxygen intake module 6 and the natural gas intake module 7 both include a metering housing 601 and a piston rod 602 fixedly arranged on one side of the linkage plate 503. A metal hard pipe 603 is connected between the outer side of one end of the metering housing 601 and the mixing tank 3. A first one-way valve 604 is arranged on the metal hard pipe 603. The first one-way valve 604 allows the gas to be discharged only from the metering housing 601 and cannot be reversely inhaled. A piston 605 is fixedly arranged at one end of the piston rod 602 that passes through the inner cavity of the metering housing 601. An air intake port 606 is arranged at one end of the metering housing 601. A second one-way valve 607 is arranged on the air intake port 606. The second one-way valve 607 allows the gas to enter the metering housing 601 and cannot be reversely discharged. The reciprocating drive module 5 drives the oxygen intake module 6 and the natural gas When the piston rod 602 on the air intake module 7 reciprocates, the piston rod 602 cooperates with the piston 605 to respectively absorb oxygen and natural gas into the metering housing 601 through the air intake port 606, and then discharge them into the mixing tank 3 through the metal hard pipe 603, so that oxygen and natural gas can be quantitatively delivered to the mixing tank 3. Moreover, when the rotation speed of the waste acid delivery pump group 8 increases and the injection amount of waste acid increases, the reciprocating speed of the oxygen intake module 6 and the natural gas intake module 7 driven by the reciprocating drive module 5 will increase accordingly, and the amount of oxygen and natural gas delivered to the mixing tank 3 per unit time by the oxygen intake module 6 and the natural gas intake module 7 will also increase accordingly. The intake amount of natural gas and oxygen can be automatically adjusted according to the injection amount of waste acid to maintain an appropriate reaction temperature and oxygen content.

[0042] As a further embodiment of the present invention, the mixing module 4 includes a rotating shaft 401 rotatably arranged in the inner cavity of the mixing tank 3, a set 402 is equidistantly fixed on the outside of the rotating shaft 401, and a stirring rod 403 is axially equidistantly fixed on the outside of the set 402. While the waste acid delivery pump group 8 delivers the waste acid, the rotating shaft 401 on the mixing module 4 can be driven to rotate through the transmission component 9. The rotating shaft 401 can drive the stirring rod 403 to rotate to quickly mix the natural gas and oxygen in the mixing tank 3. After the natural gas and oxygen are evenly mixed, they are sprayed from the natural gas nozzle 10 for combustion.

[0043] As a further embodiment of the present invention, the linkage rod includes a rotating kit 504 and a connecting rod 505. The rotating kit 504 is eccentrically fixed on one side of the turntable 501 and one side of the linkage plate 503. Universal balls 506 are fixed at both ends of the connecting rod 505, and the universal balls 506 are arranged in the rotating kit 504. The two ends of the connecting rod 505 are movably connected to the turntable 501 and the linkage plate 503 through the rotating kit 504 and the universal ball 506, so that the linkage plate 503 can be driven to reciprocate when the turntable 501 rotates.

[0044] As a further embodiment of the present invention, the gas storage ratio of the metering housing 601 on the oxygen intake module 6 and the natural gas intake module 7 is the same as the mixed combustion ratio of oxygen and natural gas. Oxygen and natural gas can be quantitatively input to allow the natural gas to burn more fully without causing waste.

[0045] As a further embodiment of the present invention, the waste acid delivery pump group 8 includes a mounting platform 801 fixedly arranged on one side of the cracking furnace body 1, a driving motor 802 is fixedly arranged on the top of the mounting platform 801, the end of the output shaft of the driving motor 802 is connected to a pump body 803, an impeller assembly 804 is arranged in the inner cavity of the pump body 803, and a connecting shaft 805 is fixedly arranged at one end of the impeller assembly 804. The driving motor 802 drives the pump body 803 to rotate to transport the waste acid that needs to be cracked. During the transportation, the impeller assembly 804 can drive the transmission assembly 9 to rotate through the connecting shaft 805, and the transmission assembly 9 can drive the mixing module 4 to rotate to quickly mix the natural gas and oxygen in the mixing tank 3.

[0046] As a further embodiment of the present invention, the transmission assembly 9 is composed of a driving pulley 901 fixedly arranged at one end of the connecting shaft 805 and a driven pulley 902 fixedly arranged at one end of the mixing module 4. A belt 903 is connected between the driving pulley 901 and the driven pulley 902. The transmission assembly 9 can drive the mixing module 4 to rotate to quickly mix the natural gas and oxygen in the mixing tank 3.

[0047] As a further embodiment of the present invention, the self-spinning waste acid spraying module 11 includes a feed pipe 1101 connected to the waste acid delivery pump group 8, and the end of the feed pipe 1101 away from the waste acid delivery pump group 8 is rotatably connected to a spray rod 1102 through a rotating seal, and the spray rod 1102 is rotatably arranged in the inner cavity of the cracking furnace body 1, and an annular collecting box 1103 is equidistantly fixedly sleeved on the outside of the spray rod 1102, and a waste acid nozzle 1104 and a mixing plate 1105 are axially equidistantly arranged on the outside of the annular collecting box 1103, and the waste acid nozzle 1104 and the mixing plate 1105 are staggered and arranged at intervals;

[0048] The inner side of the annular collecting box 1103 is connected with the spraying rod 1102, and the waste acid nozzle 1104 is tiltedly arranged on the outer side of the annular collecting box 1103. When the waste acid is sprayed into the cracking furnace body 1 through the self-spinning waste acid spraying module 11, the reverse thrust during the waste acid spraying can drive the self-spinning waste acid spraying module 11 to rotate. The self-spinning waste acid spraying module 11 sprays the waste acid while rotating, which not only makes the acid feeding uniform, but also fully stirs and mixes the sprayed waste acid and the burning flame through the mixing plate 1105 when the self-spinning waste acid spraying module 11 rotates, so that the waste acid and the burning flame can be fully in contact, which can effectively improve the heat exchange effect and further improve the cracking effect.

[0049] As a further embodiment of the present invention, the flow-guiding and mixing mechanism 12 includes an upper plate 1201 and a lower plate 1202, and a mixing plate 1203 with air holes is fixedly arranged equidistantly between the upper plate 1201 and the lower plate 1202. The burning gas flows in from the bottom end of the flow-guiding and mixing mechanism 12, and flows out from the top end of the flow-guiding and mixing mechanism 12 after being mixed by the mixing plate 1203 with air holes. The flow-guiding and mixing mechanism 12 can not only improve the flow path of the gas in the cracking furnace and increase the residence time of the waste acid in the cracking furnace, but also mix the gas during the flow-guiding process, so that the waste acid can be fully in contact with the burning flame, which can effectively improve the heat exchange effect and further improve the cracking effect.

[0050] As a further embodiment of the present invention, the air inlet control module 13 includes a slide bar 1301 fixedly arranged on the outside of the flow guide and mixing mechanism 12, a slide plate 1302 and a return spring 1303 are sleeved on the outside of the slide bar 1301, and an air inlet plugging component 1304 is fixedly connected to the top of the slide plate 1302 through a rod. The air inlet control module 13 can automatically adjust the size of the air inlet 2 at the cracking furnace. When the injection amount of waste acid, natural gas and oxygen increases, the gas flow rate in the cracking furnace will increase accordingly. Increase, the greater the gas flow rate, the greater the displacement of the air inlet blocking component 1304 on the air volume control module 13 under the push of the air flow, and the air inlet volume at the air inlet 2 increases accordingly. On the contrary, when the gas flow rate decreases, the air inlet blocking component 1304 on the air volume control module 13 automatically resets under the action of the reset spring 1303, and the air inlet 2 can be automatically blocked to reduce the air inlet volume at the air inlet 2, and appropriate air can be automatically added into the cracking furnace to maintain an appropriate oxygen concentration and improve the conversion rate of the spent acid;

[0051] The air inlet blocking component 1304 is composed of a vertical airflow shielding plate and a blocking plate, and the blocking plate is fixedly arranged on one side of the top of the vertical airflow shielding plate.

[0052] Working principle of the present invention:

[0053] During cracking, the waste acid to be cracked is transported to the self-spinning waste acid spraying module 11 through the waste acid delivery pump group 8. The transported waste acid is finally sprayed into the cracking furnace body 1 through the self-spinning waste acid spraying module 11. While the waste acid is sprayed, the waste acid delivery pump group 8 can drive the mixing module 4 to rotate through the transmission component 9 to quickly mix the natural gas and oxygen in the mixing tank 3. After the natural gas and oxygen are evenly mixed, they are sprayed from the natural gas nozzle 10 for combustion. The burning flame can quickly perform high-temperature cracking on the waste acid sprayed from the self-spinning waste acid spraying module 11. The waste acid delivery pump group 8 drives the mixing module 4 to rotate the mixing tank 3, while the natural gas and oxygen in the mixing tank are quickly mixed, the mixing module 4 can drive the oxygen intake module 6 and the natural gas intake module 7 to quantitatively transport oxygen and natural gas into the mixing tank 3 through the reciprocating drive module 5, and when the speed of the waste acid delivery pump group 8 increases and the injection amount of the waste acid increases, the reciprocating speed of the oxygen intake module 6 and the natural gas intake module 7 driven by the reciprocating drive module 5 will increase accordingly, and the amount of oxygen and natural gas transported to the mixing tank 3 per unit time by the oxygen intake module 6 and the natural gas intake module 7 will also increase accordingly, and the intake amount of natural gas and oxygen can be automatically adjusted according to the injection amount of the waste acid to maintain The reaction temperature and oxygen content are maintained appropriately. The waste acid is sprayed into the cracking furnace body 1 through the self-spinning waste acid spraying module 11. The reverse thrust during the waste acid spraying can drive the self-spinning waste acid spraying module 11 to rotate. The self-spinning waste acid spraying module 11 can spray the waste acid uniformly while rotating. The combustion gas flows in from the bottom end of the flow guiding and mixing mechanism 12, and flows out from the top end of the flow guiding and mixing mechanism 12 after mixing through the mixing plate 1203 with air holes. During the flow of the combustion gas, the air flow can be used to blow the air intake control module 13, and the air intake control module 13 can adjust the air intake at the air inlet 2 on the cracking furnace. Automatic adjustment. When the injection amount of waste acid, natural gas and oxygen increases, the gas flow rate in the cracking furnace will increase accordingly. The greater the gas flow rate, the greater the displacement of the air inlet blocking component 1304 on the air volume control module 13 under the push of the air flow. At this time, the air intake at the air inlet 2 increases accordingly. On the contrary, when the gas flow rate becomes smaller, the air inlet blocking component 1304 on the air volume control module 13 automatically resets under the action of the reset spring 1303, and the air inlet 2 can be automatically blocked to reduce the air intake at the air inlet 2. Appropriate air can be automatically added to the cracking furnace to maintain an appropriate oxygen concentration and improve the conversion rate of the waste acid.

[0054] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions only describe the principles of the present invention. The present invention may have various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention to be protected, and the scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A spent acid cracking furnace, comprising a cracking furnace body (1), an air inlet (2) and a mixing tank (3) arranged on the cracking furnace body (1), characterized in that: A mixing module (4) is rotatably provided in the inner cavity of the mixing tank (3); one end of the mixing module (4) is fixedly connected to a reciprocating drive module (5); one end of the reciprocating drive module (5) is connected to an oxygen intake module (6) and a natural gas intake module (7); and the oxygen intake module (6) and the natural gas intake module (7) are fixedly connected to each other; a waste acid delivery pump group (8) is fixedly provided on one side of the top of the cracking furnace body (1); a transmission component is connected between one end of the waste acid delivery pump group (8) and the mixing module (4); (9), a natural gas nozzle (10) is fixedly connected to one side of the mixing tank (3) through a pipe fitting, a self-spinning waste acid spraying module (11) is fixedly connected to the discharge end of the waste acid delivery pump group (8), a flow guiding and mixing mechanism (12) is fixedly provided on one side of the self-spinning waste acid spraying module (11) at an equidistant position in the inner cavity of the cracking furnace body (1), an air inlet volume control module (13) is provided on one side of the top of the flow guiding and mixing mechanism (12), and an exhaust port (14) is provided on one end of the cracking furnace body (1) away from the mixing tank (3); The reciprocating drive module (5) comprises a rotating disk (501) fixedly arranged at one end of the mixing module (4); a guide rod (502) is fixedly arranged at one end of the mixing tank (3) on the periphery of the rotating disk (501); a linkage plate (503) is sleeved on the outer side of the guide rod (502); and a linkage rod is connected between the linkage plate (503) and the rotating disk (501); The oxygen intake module (6) and the natural gas intake module (7) both comprise a metering housing (601) and a piston rod (602) fixedly arranged on one side of a linkage plate (503); a metal hard pipe (603) is connected between the outer side of one end of the metering housing (601) and the mixing tank (3); a first non-return valve (604) is arranged on the metal hard pipe (603); a piston (605) is fixedly arranged on one end of the piston rod (602) penetrating the inner cavity of the metering housing (601); an air intake port (606) is arranged on one end of the metering housing (601); and a second non-return valve (607) is arranged on the air intake port (606).

2. A spent acid cracking furnace according to claim 1, characterized in that: The mixing module (4) comprises a rotating shaft (401) rotatably arranged in the inner cavity of the mixing tank (3), a sleeve (402) is equidistantly fixedly sleeved on the outer side of the rotating shaft (401), and a stirring rod (403) is axially equidistantly fixedly arranged on the outer side of the sleeve (402).

3. A spent acid cracking furnace according to claim 1, characterized in that: The linkage rod comprises a rotating kit (504) and a connecting rod (505); the rotating kit (504) is eccentrically fixedly arranged on one side of the rotating disk (501) and one side of the linkage plate (503); universal balls (506) are fixedly arranged at both ends of the connecting rod (505); and the universal balls (506) are arranged in the rotating kit (504).

4. A spent acid cracking furnace according to claim 1, characterized in that: The gas storage ratio of the metering housings (601) on the oxygen intake module (6) and the natural gas intake module (7) is the same as the mixed combustion ratio of oxygen and natural gas.

5. A spent acid cracking furnace according to claim 1, characterized in that: The waste acid delivery pump group (8) comprises a mounting platform (801) fixedly arranged on one side of the cracking furnace body (1), a driving motor (802) fixedly arranged on the top of the mounting platform (801), a pump body (803) connected to the end of the output shaft of the driving motor (802), an impeller assembly (804) arranged in the inner cavity of the pump body (803), and a connecting shaft (805) fixedly arranged at one end of the impeller assembly (804).

6. A spent acid cracking furnace according to claim 5, characterized in that: The transmission assembly (9) is composed of a driving pulley (901) fixedly arranged at one end of the connecting shaft (805) and a driven pulley (902) fixedly arranged at one end of the mixing module (4), and a belt (903) is connected between the driving pulley (901) and the driven pulley (902).

7. A spent acid cracking furnace according to claim 1, characterized in that: The self-rotating waste acid spraying module (11) comprises a feed pipe (1101) connected to a waste acid delivery pump group (8); one end of the feed pipe (1101) away from the waste acid delivery pump group (8) is rotatably connected to a spraying rod (1102) via a rotating seal; the spraying rod (1102) is rotatably arranged in the inner cavity of a cracking furnace body (1); an annular collecting box (1103) is equidistantly fixedly sleeved on the outer side of the spraying rod (1102); a waste acid spray head (1104) and a mixing plate (1105) are axially equidistantly arranged on the outer side of the annular collecting box (1103); and the waste acid spray head (1104) and the mixing plate (1105) are arranged in a staggered manner; The inner side of the annular collecting box (1103) is connected to the spraying rod (1102), and the waste acid spray head (1104) is arranged obliquely on the outer side of the annular collecting box (1103).

8. The spent acid cracking furnace according to claim 1, characterized in that: The flow guiding and mixing mechanism (12) comprises an upper plate (1201) and a lower plate (1202), and a mixing plate (1203) with air holes is fixedly arranged at equal distances between the upper plate (1201) and the lower plate (1202).

9. A spent acid cracking furnace according to claim 8, characterized in that: The air intake control module (13) comprises a sliding rod (1301) fixedly arranged on the outside of the flow guiding and mixing mechanism (12); a sliding plate (1302) and a return spring (1303) are sleeved on the outside of the sliding rod (1301); and an air inlet blocking component (1304) is fixedly connected to the top of the sliding plate (1302) via a rod; The air inlet blocking component (1304) consists of a vertical airflow shielding plate and a blocking plate, and the blocking plate is fixedly arranged on one side of the top end of the vertical airflow shielding plate.

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