Cracking reaction device for naphtha production

Abstract

The invention provides a cracking reaction device for naphtha production, and relates to the field of naphtha production equipment. A cracking reaction device for naphtha production comprises a side leg frame, the top of the inner side of the side leg frame is fixedly connected with a feeding hopper, the bottom of the feeding hopper is fixedly connected with a center frame used in cooperation with the side leg frame, and the tops of the periphery of the center frame communicate with piston cylinders; rotating assemblies are arranged on the upper side and the lower side of the center frame, each rotating assembly comprises a double-head motor fixed to the bottom of an inner cavity of the center frame, a supply assembly is arranged at the top of the inner cavity of the center frame and comprises a cam frame fixed to the top of a long shaft, and a temperature control assembly is arranged at one end of the supply assembly; the periphery of the bottom of the center frame is provided with a rotational flow assembly and a conveying assembly. According to the cracking reaction device for naphtha production, on the premise of controlling three main factors of temperature, pressure and air speed, the efficient cascade catalytic cracking effect on naphtha is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of naphtha production equipment, and in particular to a cracking reaction device for naphtha production. Background Art

[0002] Naphtha is one of the petroleum products, also known as chemical light oil and crude gasoline. It is a light oil used as chemical raw material produced from crude oil or other raw materials. It is mainly used as chemical raw material. Due to different uses, there are various distillation ranges. China stipulates that the distillation range is about 220°C at the final distillation point. When used as a cracking raw material for the production of ethylene, a fraction of 70°C-145°C is used, which is called light naphtha; when the purpose is to produce aromatics or high-octane gasoline, a fraction of 70°C-180°C is used, which is called heavy naphtha; when used as a solvent, it is called solvent naphtha; aromatic solvents from coal tar are also called heavy naphtha or solvent naphtha.

[0003] In the prior art (the announcement number is CN113717748A, and the patent name is a patent application for a naphtha cracking device), the naphtha raw material can be pretreated cyclically to reduce the aromatic components of the raw material, effectively reduce the coking of the cracking furnace, and increase the proportion of normal alkanes in the pretreatment product, improve the cracking olefin yield, and use a molecular sieve with a variable cross-sectional area to improve the screening efficiency of the molecular sieve, reduce the reaction time, and achieve the purpose of increasing the output value. In the process of implementing this technical solution, it is found that there are at least the following problems in the prior art.

[0004] With the improvement of environmental protection requirements, the composition and quality requirements of automotive gasoline are becoming more and more stringent. At present, the cracking methods used for naphtha production mostly only screen and crack the static naphtha. Since the main factors affecting naphtha cracking are temperature, pressure and air velocity, if any factor is not effectively controlled, it will lead to insufficient cracking of naphtha. Summary of the invention

[0005] The present application aims to at least solve the technical problem that the prior art cannot achieve efficient step-by-step catalytic cracking of naphtha under the premise of controlling the three main factors of temperature, pressure and space velocity, resulting in insufficient cracking of naphtha. To this end, the present application proposes a cracking reaction device for naphtha production.

[0006] A cracking reaction device for naphtha production according to an embodiment of the present application comprises: a side leg frame, wherein the top of the inner side of the side leg frame is fixedly connected to an upper hopper, and the bottom of the upper hopper is fixedly connected to a center frame used in conjunction with the side leg frame, and the tops of the four sides of the center frame are all connected to piston cylinders;

[0007] The upper and lower sides of the center frame are both provided with a rotating assembly, and the rotating assembly includes a double-headed motor fixed to the bottom of the inner cavity of the center frame, and a long shaft fixed to one output shaft of the double-headed motor. The top of the inner cavity of the center frame is provided with a supply assembly, and the supply assembly includes a cam frame fixed to the top of the long shaft. A temperature control assembly is provided at one end of the supply assembly;

[0008] The four sides of the bottom of the central frame are respectively provided with swirl components and conveying components.

[0009] Preferably, driving circular gears are fixedly connected to the upper and lower sides of the long shaft, and driven gear rings are meshed around the driving circular gears, the inner cavities of the driven gear rings are respectively fixedly connected to the primary cracking tank and the secondary cracking tank, and annular slide rails are provided on the upper and lower sides of the primary cracking tank and the secondary cracking tank, and annular slide rails are rotatably connected to the annular slide rails that are fixedly matched with the side leg frames.

[0010] Preferably, the cam frame is slidably connected with a push rod frame on all sides, and the other end of the push rod frame is fixedly connected with a piston head slidably matched with the piston cylinder, the outer surface of the push rod frame is sleeved with a return spring fixedly matched with the piston head, and an intake valve is provided on the air inlet of the piston cylinder, an exhaust valve is provided on the exhaust port of the piston cylinder and is connected to a pressure storage cylinder fixedly matched with the side leg frame, and the exhaust port of the pressure storage cylinder is connected to a three-way pipe, both ends of the three-way pipe are connected to arc pipes, and the other end of the arc pipe is connected to a five-way valve.

[0011] Preferably, the temperature control component includes a heat storage cavity opened in the inner cavity of the first-stage cracking tank and the second-stage cracking tank, and the first-stage cracking tank and the second-stage cracking tank are provided with annular edges on the upper and lower sides close to the driven gear ring, the outer end of the five-way valve is connected to an electric heater fixedly matched with the side leg frame, and the upper and lower ends of the five-way valve are connected to a main pipe, the other two ends of the main pipe are connected to branch pipes, and the inner end of the branch pipe is connected to an annular pipe rack, the upper and lower sides of the annular pipe rack are provided with annular slide grooves rotatably matched with the annular edges, and the inner cavity of the annular pipe rack is provided with injection holes used in conjunction with the heat storage cavity around it.

[0012] Preferably, the swirl assembly includes a short shaft fixed on the other output shaft of the double-head motor, and the bottom of the short shaft is fixedly connected to a main synchronous wheel, the main synchronous wheel is connected to auxiliary synchronous wheels on all sides through a synchronous belt transmission, and the main synchronous wheel is connected to limiting wheels that rotate with the center frame on all sides close to the synchronous belt, the inner cavity of the auxiliary synchronous wheel is fixedly connected to a hollow tube that rotates through the primary cracking tank and the secondary cracking tank, and the upper and lower sides of the hollow tube are provided with primary swirl holes and secondary swirl holes that are swirl-jerk-jet-jet-jet-jet-jet-jet-jet-jet-jet-jet-jet-jet-jet-jet-jet-jet-jet-jet-jet-jet-jet-jet-jet-jet-jet-jet-jet-

[0013] Preferably, the conveying assembly includes a boosting pipe connected to the bottom of the pressure storage cylinder, and the boosting pipe is connected to a three-way valve, the outer end of the three-way valve is connected to a feeding head, and the end of the boosting pipe away from the pressure storage cylinder is connected to a distribution rack fixedly matched with the center rack, the four ends of the distribution rack are connected to conveying pipes staggered with the boosting pipes, and the end of the conveying pipe away from the distribution rack is connected to a first rotating end, and the inner cavity of the first rotating end is rotatably connected to the first connecting end that is integrally matched with the hollow tube.

[0014] Preferably, the first-stage cracking tank and the second-stage cracking tank are connected to each other on all sides with a first-stage discharge pipe, and a first electric-controlled valve is provided on the first-stage discharge pipe.

[0015] Preferably, one side of the bottom of the secondary cracking tank is connected to a secondary discharge pipe, and a second electric-controlled valve is provided on the secondary discharge pipe.

[0016] Preferably, a temperature sensor is embedded in the inner end of the five-way valve, and both upper and lower ends of the main pipe are connected to electronic digital pressure gauges.

[0017] Preferably, a check valve is embedded in one end of the hollow tube close to the auxiliary synchronous wheel, and a pressure sensor is embedded in the inner end of the three-way valve.

[0018] The beneficial effects of the present application are as follows: during the cracking of naphtha, a unified driving source is first provided by a double-headed motor, and the meshing rotation cooperation between the active circular gear and the driven gear ring is driven by the long shaft to realize the synchronous rotation effect of the three groups of primary cracking tanks and the secondary cracking tanks, and the naphtha with different cracking degrees in the three groups of primary cracking tanks and the secondary cracking tanks rotate accordingly, so that the naphtha with different cracking degrees remains dynamic, which is conducive to the reaction between it and the additive. Then, the long shaft performs reciprocating work in the piston cylinder through the cam frame, the push rod frame and the piston head, and the pressurized gas generated by the work in the piston cylinder is supplied to the pressure storage cylinder for standby use, and then supplied to the five-way valve by the three-way pipe and the arc pipe. At the same time, the electric heater provides a temperature control heat source supply, and the heat source is supplied to the heat storage cavity in the three groups of primary cracking tanks and the secondary cracking tanks by the main pipe, the branch pipe, the annular pipe rack and the injection hole, so that the naphtha with different cracking degrees in the three groups of primary cracking tanks and the secondary cracking tanks are effectively The temperature control effect is realized to prevent the temperature factor from affecting the cracking reaction of naphtha. Then, the belts between the main synchronous wheel, the auxiliary synchronous wheel and the limit wheel are driven by the short shaft to rotate and cooperate, and then the auxiliary synchronous wheel drives the primary swirl hole and the secondary swirl hole on the hollow tube to rotate in the three groups of primary cracking tanks and secondary cracking tanks. At the same time, the pressurized gas in the pressure storage cylinder is supplied to the distribution frame by the booster pipe, and the catalytic cracking agent is correspondingly injected into the distribution frame through the three-way valve through the feeding head. Under the action of the pressure force, the catalytic cracking agent reaching the distribution frame is forced to be supplied into the rotating hollow tube through the conveying pipe at a predetermined air velocity, and swirls from the primary swirl hole and the secondary swirl hole into the primary cracking tank and the secondary cracking tank. At the same time, the primary cracking tank and the secondary cracking tank are also pressurized to prevent the pressure and air velocity factors from affecting the cracking reaction of naphtha, and achieve an efficient step-by-step catalytic cracking effect on naphtha to improve its cracking sufficiency.

[0019] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of a cracking reaction device for naphtha production according to an embodiment of the present application;

[0022] Figure 2 is a three-dimensional structural cross-sectional view of a cracking reaction device for naphtha production according to an embodiment of the present application;

[0023] Figure 3 This is a bottom view of the three-dimensional structure of a cracking reaction device for naphtha production according to an embodiment of the present application;

[0024] Figure 4 is a front cross-sectional view of a rotating assembly structure according to an embodiment of the present application;

[0025] Figure 5 is a partial bottom view of the rotating assembly structure according to an embodiment of the present application;

[0026] Figure 6 This is a front view of the structure of the primary cracking tank and the secondary cracking tank according to an embodiment of the present application;

[0027] Figure 7 is a side cross-sectional view of a primary cracking tank structure according to an embodiment of the present application;

[0028] Figure 8 It is a front cross-sectional view of the structure of the center frame, piston cylinder, rotating assembly, supply assembly, temperature control assembly, swirl assembly and conveying assembly according to an embodiment of the present application;

[0029] Fig. 9 This is a front view of the structure of the rotating assembly, the supply assembly and the temperature control assembly according to an embodiment of the present application;

[0030] Fig.10 is a side view of the temperature control component structure according to an embodiment of the present application;

[0031] Fig.11 This is a front view of the structure of the pressure storage cylinder, the swirl assembly and the conveying assembly according to an embodiment of the present application;

[0032] Fig.12 is a partial bottom view of the swirl assembly structure according to an embodiment of the present application;

[0033] Fig.13 is a partial top view of the conveying assembly structure according to an embodiment of the present application;

[0034] Fig.14 is a bottom view of a hollow tube structure according to an embodiment of the present application;

[0035] Fig.15 is a bottom-up cross-sectional view of the upper hopper, the rotating assembly and the material distribution assembly structure according to an embodiment of the present application;

[0036] Fig.16 is a top view of the structure of the rotating assembly and the cloth assembly according to an embodiment of the present application;

[0037] Fig.17 is a top exploded view of a fabric assembly structure according to an embodiment of the present application;

[0038] Fig.18 is a bottom exploded view of the upper hopper and material distribution assembly structure according to an embodiment of the present application;

[0039] Fig.19 This is a front view of the side leg frame, upper hopper, center frame, piston cylinder and annular slide structure according to an embodiment of the present application.

[0040] Icons: 1. Side leg frame; 2. Upper hopper; 3. Center frame; 4. Piston cylinder; 5. Rotating assembly; 51. Double-head motor; 52. Long shaft; 53. Driving circular gear; 54. Driven gear ring; 55. Primary cracking tank; 56. Secondary cracking tank; 57. Annular slide rail; 58. Annular slide; 6. Supply assembly; 61. Cam frame; 62. Push rod frame; 63. Piston head; 64. Return spring; 65. Pressure storage cylinder; 66. Three-way pipe; 67. Arc pipe; 68. Five-way valve; 7. Temperature control assembly; 71. Heat storage cavity; 72. Annular edge; 73. Electric heater; 74. Main pipe; 75. Branch pipe; 76. Annular pipe rack; 77. Annular chute; 78. Injection hole; 8. Swirl assembly; 81. Short shaft; 82. Main synchronous wheel; 83. Sub synchronous wheel; 84. Limit wheel; 85. Hollow tube; 86. Primary swirl hole; 87. Secondary swirl hole; 9. Conveying assembly; 91. Booster pipe; 92. Three-way valve; 93. Feeding head; 94. Distribution rack; 95. Conveying pipe; 96. First rotating end; 97. First connecting end; 10. Material distribution assembly; 101. Material guide cover; 102. Active bevel gear; 103. Driven bevel gear; 104. Mixing rack; 105. Material guide blade; 106. Feeding pipe; 107. Secondary rotating end; 108. Second connecting end; 109. Material distribution rack; 11. Primary discharge pipe; 12. Secondary discharge pipe; 13. Temperature sensor; 14. Check valve; 15. Pressure sensor. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0042] In order to make the purpose, technical solutions and advantages of the implementation methods of this application clearer, the technical solutions in the implementation methods of this application will be clearly and completely described below in conjunction with the drawings in the implementation methods of this application. Obviously, the described implementation methods are part of the implementation methods of this application, not all of the implementation methods. Based on the implementation methods in this application, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0043] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0044] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0046] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0047] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0048] like Figure 1-Figure 19 As shown, a cracking reaction device for naphtha production according to an embodiment of the present application comprises: a side leg frame 1, an upper hopper 2 is fixedly connected to the top of the inner side of the side leg frame 1, and a center frame 3 used in conjunction with the side leg frame 1 is fixedly connected to the bottom of the upper hopper 2, and the tops of the four sides of the center frame 3 are all connected to a piston cylinder 4 for reciprocating work, and after the reciprocating work, pressurized gas is generated in the piston cylinder 4 for later use;

[0049] The upper and lower sides of the center frame 3 are provided with rotating components 5 used in conjunction with the side leg frames 1 and the upper hopper 2, and the rotating components 5 are mainly used to keep dynamic during the catalytic cracking reaction of naphtha, so that the naphtha and the catalytic cracking agent are fully contacted and reacted. The top of the inner cavity of the center frame 3 is provided with a supply component 6 used in conjunction with the piston cylinder 4, and one end of the supply component 6 is provided with a temperature control component 7 used in conjunction with the rotating component 5 to provide temperature control protection during the catalytic cracking of naphtha. The four sides of the bottom of the center frame 3 are respectively provided with swirl components 8 and conveying components 9 used in conjunction with the rotating component 5 to provide catalytic cracking agent space velocity and cracking pressure protection during the catalytic cracking of naphtha, so as to achieve an efficient step-by-step catalytic cracking effect for naphtha and improve its cracking sufficiency.

[0050] like Figure 4 and Fig.14 As shown, the rotating assembly 5 includes a double-headed motor 51 fixed to the bottom of the inner cavity of the center frame 3, the double-headed motor 51 provides a unified driving source, and a long shaft 52 fixed to an output shaft of the double-headed motor 51, the upper and lower sides of the long shaft 52 are fixedly connected with a driving circular gear 53, and the driving circular gear 53 is meshed with a driven gear ring 54 around it, and the long shaft 52 drives the meshing rotation between the driving circular gear 53 and the driven gear ring 54, and the inner cavity of the driven gear ring 54 is fixedly connected with a primary gear 53, a secondary gear 54, a secondary ... The first cracking tank 55 and the second cracking tank 56 are provided with annular slide rails 57 on the upper and lower sides of the first cracking tank 55 and the second cracking tank 56, and the annular slide rails 58 fixedly matched with the side leg frame 1 are rotatably connected to the annular slide rails 57, so as to realize the synchronous rotation effect of the three groups of the first cracking tank 55 and the second cracking tank 56, and the naphtha with different cracking degrees in the three groups of the first cracking tank 55 and the second cracking tank 56 rotate accordingly, so that the naphtha with different cracking degrees remains dynamic, which is conducive to the reaction between the naphtha and the additive;

[0051] The primary cracking tank 55 and the secondary cracking tank 56 are connected to each other on all sides with a primary discharge pipe 11, and a first electrically-controlled valve is provided on the primary discharge pipe 11 to supply the naphtha that has completed the primary catalytic cracking reaction in the primary cracking tank 55 to the secondary cracking tank 56. A secondary discharge pipe 12 is connected to one side of the bottom of the secondary cracking tank 56, and a second electrically-controlled valve is provided on the secondary discharge pipe 12 to discharge the naphtha that has completed the secondary catalytic cracking reaction in the secondary cracking tank 56.

[0052] The supply assembly 6 includes a cam frame 61 fixed on the top of the long shaft 52, and the cam frame 61 is slidably connected with a push rod frame 62 on all sides, and the other end of the push rod frame 62 is fixedly connected with a piston head 63 that slides with the piston cylinder 4. The outer surface of the push rod frame 62 is sleeved with a return spring 64 that is fixedly matched with the piston head 63, and an intake valve is provided on the air inlet of the piston cylinder 4. The long shaft 52 reciprocates in the piston cylinder 4 through the cam frame 61, the push rod frame 62 and the piston head 63. An exhaust valve is provided on the exhaust port of the piston cylinder 4 and is connected to a pressure storage cylinder 65 fixedly matched with the side leg frame 1, and the pressurized gas generated by the work done in the piston cylinder 4 is supplied to the pressure storage cylinder 65 for standby use, and the exhaust port of the pressure storage cylinder 65 is connected to a three-way pipe 66, both ends of the three-way pipe 66 are connected to an arc tube 67, and the other end of the arc tube 67 is connected to a five-way valve 68, and the inner end of the five-way valve 68 is embedded with a temperature sensor 13, which is then supplied to the five-way valve 68 by the three-way pipe 66 and the arc tube 67.

[0053] The temperature control assembly 7 includes a heat storage cavity 71 opened in the inner cavity of the primary cracking tank 55 and the secondary cracking tank 56, and the primary cracking tank 55 and the secondary cracking tank 56 are both provided with annular edges 72 on both sides near the driven gear ring 54. The outer end of the five-way valve 68 is connected to an electric heater 73 fixedly matched with the side leg frame 1, and the electric heater 73 provides a temperature control heat source supply, and the upper and lower ends of the five-way valve 68 are both connected to a main pipe 74, and the upper and lower ends of the main pipe 74 are both connected to an electronic digital pressure gauge, and the other two ends of the main pipe 74 are both connected to a branch pipe 75, and the inner end of the branch pipe 75 is connected to There is an annular pipe rack 76, and an annular slide groove 77 rotatably matched with the annular edge 72 is provided on the upper and lower sides of the annular pipe rack 76, and injection holes 78 used in conjunction with the heat storage cavity 71 are provided around the inner cavity of the annular pipe rack 76. The heat source is supplied to the heat storage cavity 71 in the three groups of primary cracking tanks 55 and secondary cracking tanks 56 by the main pipe 74, the branch pipe 75, the annular pipe rack 76 and the injection holes 78, so as to achieve a temperature control effect on the naphtha with different cracking degrees in the three groups of primary cracking tanks 55 and secondary cracking tanks 56, so as to prevent the temperature factor from affecting the cracking reaction of the naphtha.

[0054] The swirl assembly 8 includes a short shaft 81 fixed on the other output shaft of the double-headed motor 51, and the bottom of the short shaft 81 is fixedly connected to the main synchronous wheel 82, and the main synchronous wheel 82 is connected to the auxiliary synchronous wheel 83 through a synchronous belt transmission. The main synchronous wheel 82 is connected to the limiting wheel 84 that rotates with the center frame 3 near the synchronous belt. The short shaft 81 drives the main synchronous wheel 82, the auxiliary synchronous wheel 83 and the limiting wheel 84 to rotate with the belt, and the inner cavity of the auxiliary synchronous wheel 83 is fixedly connected to the A hollow tube 85 is connected to rotate with the primary cracking tank 55 and the secondary cracking tank 56, and a check valve 14 is embedded in one end of the hollow tube 85 close to the auxiliary synchronous wheel 83. The upper and lower sides of the hollow tube 85 are provided with a primary swirl hole 86 and a secondary swirl hole 87 for swirl injection with the primary cracking tank 55 and the secondary cracking tank 56. The primary swirl hole 86 and the secondary swirl hole 87 on the hollow tube 85 are driven by the auxiliary synchronous wheel 83 to rotate in the three groups of primary cracking tanks 55 and the secondary cracking tanks 56.

[0055] The conveying assembly 9 includes a boosting pipe 91 connected to the bottom of the pressure storage cylinder 65, and the boosting pipe 91 is connected to a three-way valve 92, the inner end of the three-way valve 92 is embedded with a pressure sensor 15, the outer end of the three-way valve 92 is connected to a charging head 93, and the end of the boosting pipe 91 away from the pressure storage cylinder 65 is connected to a distribution frame 94 fixedly matched with the center frame 3, the boosting pipe 91 supplies the pressurized gas in the pressure storage cylinder 65 into the distribution frame 94, and the charging head 93 injects the catalytic cracking agent into the distribution frame 94 through the three-way valve 92, and the four ends of the distribution frame 94 are connected to the delivery pipes 95 staggered with the boosting pipe 91, and under the action of the pressure force, the pressure reaching the distribution frame is forced to The catalytic cracking agent in the distribution rack 94 is supplied into the rotating hollow tube 85 at a predetermined air velocity through the delivery pipe 95, and the end of the delivery pipe 95 away from the distribution rack 94 is connected to a first rotating end 96, and the inner cavity of the first rotating end 96 is rotatably connected to a first connecting end 97 that cooperates with the hollow tube 85. While swirling from the primary swirl holes 86 and the secondary swirl holes 87 to the primary cracking tank 55 and the secondary cracking tank 56, the primary cracking tank 55 and the secondary cracking tank 56 are also pressurized to prevent the pressure and air velocity factors from affecting the cracking reaction of the naphtha, and to achieve an efficient step-by-step catalytic cracking effect on the naphtha to improve its cracking sufficiency.

[0056] like Figures 15 to 18As shown, before cracking naphtha, naphtha is mostly directly injected into the cracking equipment, and the injected naphtha cannot be pre-mixed with the displacing agent and the desorbing agent, so that the naphtha cannot be replaced and desorbed, which is not conducive to the subsequent rapid cracking of the naphtha. The inner cavity of the upper hopper 2 is provided with an embedded frame, and the top of the upper hopper 2 is clamped with a cap to seal the naphtha injected into the upper hopper 2 from dust. The inner cavity of the upper hopper 2 is provided with a distribution component 10 used in conjunction with the embedded frame, and the distribution component 10 includes a guide cover 101 fixed at the top of the long axis 52, which pre-guides the naphtha poured into the upper hopper 2 to prevent naphtha from splashing. The long axis 52 is close to the guide cover. The bottom of 101 is fixedly connected with a driving bevel gear 102 that rotates with the embedded frame, and the driving bevel gear 102 is meshed with driven bevel gears 103 on all sides. The inner cavity of the driven bevel gear 103 is fixedly connected with a mixing frame 104 that rotates with the embedded frame. The long shaft 52 drives the three sets of driven bevel gears 103 to rotate synchronously through the driving bevel gear 102. While the three sets of driven bevel gears 103 drive the three sets of mixing frames 104 to rotate, the naphtha added to the upper hopper 2 is pre-mixed with the replacement agent and the desorbent, so that the non-ideal products in the naphtha are replaced and desorbed, and the non-ideal products in the naphtha are selectively converted into ethylene and propylene ideal products;

[0057] The long axis 52 is fixedly connected with guide blades 105 around the bottom of the embedded frame, and the upper hopper 2 is connected with a discharge pipe 106 used in conjunction with the guide blades 105 around the four sides. The guide blades 105 rotating with the long axis 52 guide the naphtha after the replacement and desorption reaction is completed to the discharge pipe 106. The bottom end of the discharge pipe 106 is connected with a second rotating end 107, and the inner cavity of the second rotating end 107 is rotatably connected with a second connecting end 108 that penetrates and cooperates with the primary cracking tank 55. The second rotating end 107 and the second connecting end 108 are rotatably connected to each other. The bottom end of the second connecting end 108 is connected with a distribution rack 109 that cooperates with the distribution of the primary cracking tank 55. The naphtha after the replacement and desorption reaction in the discharge pipe 106 is evenly distributed in the primary cracking tank 55 through the distribution rack 109 to carry out a primary catalytic cracking reaction.

[0058] Specifically, the working principle of the cracking reaction device for naphtha production is as follows: first, the naphtha to be cracked, the displacer and the desorbent are added to the upper hopper 2, the cap is locked, and the double-headed motor 51 is controlled to start and drive the long shaft 52 to rotate, and the long shaft 52 drives the guide cover 101 to rotate at the top of the upper hopper 2. The rotating guide cover 101 pre-diverts the naphtha, the displacer and the desorbent added to the upper hopper 2, while the long shaft 52 drives the active bevel gear 102 to rotate synchronously therewith, and the active bevel gear 102 drives the mixing rack 104 on the three sets of driven bevel gears 103 to rotate synchronously in the upper hopper 2, and the three sets of mixing racks 104 in the rotating state conduct pre-diversion treatment on the naphtha, the displacer and the desorbent in the upper hopper 2. The agent is mixed to make the naphtha, the displacement agent and the desorbent react in advance, and the non-ideal products in the naphtha are selectively replaced and converted into ethylene and propylene ideal products. After the naphtha in the upper hopper 2 completes the replacement and desorption reaction, the guide blade 105 that rotates synchronously with the long shaft 52 guides the naphtha in the upper hopper 2 that has completed the replacement and desorption reaction to the three groups of discharge pipes 106. Under the rotation and mutual cooperation of the second rotating end 107 and the second connecting end 108, the naphtha in the three groups of discharge pipes 106 that has completed the replacement and desorption reaction is evenly distributed to the three groups of primary cracking tanks 55 through the three groups of distribution racks 109, so as to prepare for the primary cracking operation of the naphtha that has completed the replacement and desorption reaction;

[0059] After the naphtha material after the replacement and desorption reaction is completed reaches the three groups of primary cracking tanks 55, the long shaft 52 drives the guide cover 101 to rotate, and also drives the upper and lower groups of driving circular gears 53 to rotate synchronously. The three groups of annular slide rails 57 and annular slides 58 provide rotation support for the three groups of primary cracking tanks 55 and the secondary cracking tanks 56. The driving circular gear 53 drives the driven gear rings 54 on the primary cracking tanks 55 and the secondary cracking tanks 56 to rotate synchronously, and the three groups of primary cracking tanks 55 and the secondary cracking tanks 56 also rotate synchronously. The three groups of primary cracking tanks 55 in the rotating state drive the second connecting end 108 to rotate in the three groups of second rotating end 107, so that the naphtha that sequentially reaches the three groups of primary cracking tanks 55 and the secondary cracking tanks 56 always remains dynamic.

[0060] When the long shaft 52 drives the driving circular gear 53 to rotate, it also drives the cam frame 61 to rotate synchronously. The three groups of return springs 64 play elastic buffering and return compensation for the piston heads 63 on the three groups of push rod frames 62. The cam frame 61 drives the piston heads 63 on the three groups of push rod frames 62 to reciprocate in the three groups of piston cylinders 4. The pressurized gas generated by the three groups of piston heads 63 working in the three groups of piston cylinders 4 is supplied to the three groups of pressure storage cylinders 65 for backup. Then, the pressurized gas in the three groups of pressure storage cylinders 65 is supplied to the three groups of five-way valves 68 through the arc tubes 67 at both ends of the three groups of three-way pipes 66, and the three groups of electric heaters 73 are controlled to open in advance and supplied to the three groups of five-way valves 68 and merge with the pressurized gas to form a pressurized heat source. The three groups of temperature sensors 13 monitor the temperature of the boost heat source in the three groups of five-way valves 68 in real time. The three-way boost heat source in the three groups of five-way valves 68 reaches the three groups of annular pipe racks 76 through the three groups of branch pipes 75 on the main pipes 74. The three groups of annular edges 72 and annular slide grooves 77 support the three groups of annular pipe racks 76 in rotation, so that the three groups of annular pipe racks 76 do not rotate with the three groups of primary cracking tanks 55 and secondary cracking tanks 56 and are in a stationary state. The boost heat source supplied to the three groups of annular pipe racks 76 is supplied to the heat storage cavity 71 in the three groups of primary cracking tanks 55 and secondary cracking tanks 56 through the three groups of injection holes 78, and the temperature in the three groups of primary cracking tanks 55 and secondary cracking tanks 56 is increased to a predetermined temperature state.

[0061] At the same time, the other output shaft of the double-headed motor 51 drives the main synchronous wheel 82 on the short shaft 81 to rotate synchronously with the long shaft 52. The three sets of limiting wheels 84 play a transmission limit role on the synchronous belt. Then, the main synchronous wheel 82 drives the three sets of auxiliary synchronous wheels 83 to rotate synchronously through the synchronous belt. The three sets of auxiliary synchronous wheels 83 drive the three sets of hollow tubes 85 to rotate synchronously in the three sets of primary cracking tanks 55 and the secondary cracking tanks 56, and the three sets of hollow tubes 85 drive the first connecting end portions 97 to rotate in the three sets of first rotating end portions 96. Then, the pressurized gas in the three sets of pressure storage cylinders 65 is supplied to the distribution frame 94 through the three sets of boosting pipes 91 and the three sets of three-way valves 92, and the pressure sensors 15 on the three sets of three-way valves 92 monitor the pressure of the passing pressurized gas in real time.

[0062] At the same time, three groups of feed heads 93 are used to add catalytic cracking agents into the distribution rack 94 through three groups of three-way valves 92. After the three-way catalytic cracking agents in the distribution rack 94 are combined with the three-way pressurized gas sources, the three-way catalytic cracking agents are pressurized and supplied to the three groups of delivery pipes 95. The three groups of first rotating ends 96 and first connecting ends 97 are rotated and communicated with each other to pressurize the three-way catalytic cracking agents into the three groups of rotating hollow tubes 85. The three groups of check valves 14 are used to control the pressure of the three groups of hollow tubes 85. The three-way catalytic cracking agent in the hollow tube 85 is subjected to a backflow prevention treatment, and the three-way catalytic cracking agent in the three groups of hollow tubes 85 is injected into the three groups of rotating primary cracking tanks 55 and secondary cracking tanks 56 at a predetermined airspeed through the three groups of upper and lower primary swirl holes 86 and secondary swirl holes 87, so as to be swirl-mixed with the naphtha in the three groups of primary cracking tanks 55 and secondary cracking tanks 56, and the three groups of primary cracking tanks 55 and secondary cracking tanks 56 are pressurized to a predetermined pressure;

[0063] After the naphtha in the three groups of primary cracking tanks 55 and the three-way catalytic cracking agent sprayed through the primary swirl holes 86 complete the primary catalytic cracking reaction, the first electrically controlled valve on the three groups of primary discharge pipes 11 is opened, and the naphtha that has completed the primary catalytic cracking in the three groups of primary cracking tanks 55 reaches the three groups of secondary cracking tanks 56 that rotate synchronously with the three groups of primary cracking tanks 55 through the three groups of primary discharge pipes 11, and completes the secondary catalytic cracking reaction with the three-way catalytic cracking agent sprayed through the secondary swirl holes 87 in the three groups of secondary cracking tanks 56, so that the naphtha in the three groups of primary cracking tanks 55 and the secondary cracking tanks 56 successively undergo primary and secondary catalytic cracking reactions with the catalytic cracking agent, and then the second electrically controlled valve on the three groups of secondary discharge pipes 12 is opened, and the naphtha that has completed the secondary catalytic cracking in the three groups of secondary cracking tanks 56 can be discharged through the three groups of secondary discharge pipes 12.

[0064] It should be noted that the specific model specifications of the double-headed motor 51 and the electric heater 73 need to be selected and determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in the field, so it will not be described in detail.

[0065] The power supply and principles of the double-headed motor 51 and the electric heater 73 as well as various valves and sensors are clear to those skilled in the art and will not be described in detail herein.

[0066] The above are only embodiments of the present application and are not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0067] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A cracking reaction device for naphtha production, It is characterized in that include: A side leg frame (1), wherein the top of the inner side of the side leg frame (1) is fixedly connected to an upper hopper (2), and the bottom of the upper hopper (2) is fixedly connected to a center frame (3) used in conjunction with the side leg frame (1), and the tops of the four sides of the center frame (3) are all connected to piston cylinders (4); A rotating assembly (5) is provided on both the upper and lower sides of the center frame (3), and the rotating assembly (5) includes a double-headed motor (51) fixed to the bottom of the inner cavity of the center frame (3), and a long shaft (52) fixed to an output shaft of the double-headed motor (51); a supply assembly (6) is provided at the top of the inner cavity of the center frame (3), and the supply assembly (6) includes a cam frame (61) fixed to the top of the long shaft (52); and a temperature control assembly (7) is provided at one end of the supply assembly (6); The four sides of the bottom of the central frame (3) are respectively provided with swirl components (8) and conveying components (9).

2. A cracking reaction device for naphtha production according to claim 1, It is characterized in that A driving circular gear (53) is fixedly connected to the upper and lower sides of the long shaft (52), and a driven ring gear (54) is meshed around the driving circular gear (53). The inner cavity of the driven ring gear (54) is respectively fixedly connected to a primary cracking tank (55) and a secondary cracking tank (56), and an annular slide rail (57) is provided on the upper and lower sides of the primary cracking tank (55) and the secondary cracking tank (56). An annular slide rail (58) fixedly matched with the side leg frame (1) is rotatably connected to the annular slide rail (57).

3. A cracking reaction device for naphtha production according to claim 2, It is characterized in that The cam frame (61) is slidably connected to a push rod frame (62) on all sides, and the other end of the push rod frame (62) is fixedly connected to a piston head (63) slidably matched with the piston cylinder (4), the outer surface of the push rod frame (62) is sleeved with a return spring (64) fixedly matched with the piston head (63), and an intake valve is provided on the air inlet of the piston cylinder (4), an exhaust valve is provided on the exhaust port of the piston cylinder (4) and is connected to a pressure storage cylinder (65) fixedly matched with the side leg frame (1), and the exhaust port of the pressure storage cylinder (65) is connected to a three-way pipe (66), both ends of the three-way pipe (66) are connected to an arc tube (67), and the other end of the arc tube (67) is connected to a five-way valve (68).

4. A cracking reaction device for naphtha production according to claim 3, It is characterized in that The temperature control component (7) comprises a heat storage cavity (71) provided in the inner cavity of the primary cracking tank (55) and the secondary cracking tank (56), and the primary cracking tank (55) and the secondary cracking tank (56) are provided with annular edges (72) on both upper and lower sides close to the driven gear ring (54), the outer end of the five-way valve (68) is connected to an electric heater (73) fixedly matched with the side leg frame (1), and the upper and lower ends of the five-way valve (68) are connected to a main pipe (74), the other two ends of the main pipe (74) are connected to branch pipes (75), and the inner end of the branch pipe (75) is connected to an annular pipe rack (76), the upper and lower sides of the annular pipe rack (76) are provided with annular slide grooves (77) rotatably matched with the annular edges (72), and the inner cavity of the annular pipe rack (76) is provided with injection holes (78) used in conjunction with the heat storage cavity (71) around the inner cavity.

5. A cracking reaction device for naphtha production according to claim 4, It is characterized in that The swirl assembly (8) comprises a short shaft (81) fixed on the other output shaft of the double-headed motor (51), and a main synchronous wheel (82) is fixedly connected to the bottom of the short shaft (81), and the main synchronous wheel (82) is connected to the auxiliary synchronous wheel (83) via a synchronous belt transmission on all sides, and the main synchronous wheel (82) is connected to the limit wheel (84) that rotates with the center frame (3) on all sides close to the synchronous belt, and the inner cavity of the auxiliary synchronous wheel (83) is fixedly connected to a hollow tube (85) that rotates through the primary cracking tank (55) and the secondary cracking tank (56), and the upper and lower sides of the hollow tube (85) are provided with a primary swirl hole (86) and a secondary swirl hole (87) that swirls with the primary cracking tank (55) and the secondary cracking tank (56) on both sides.

6. A cracking reaction device for naphtha production according to claim 5, It is characterized in that The conveying assembly (9) includes a boosting pipe (91) connected to the bottom of the pressure storage cylinder (65), and the boosting pipe (91) is connected to a three-way valve (92), the outer end of the three-way valve (92) is connected to a feeding head (93), and the end of the boosting pipe (91) away from the pressure storage cylinder (65) is connected to a distribution rack (94) fixedly matched with the center rack (3), the four ends of the distribution rack (94) are all connected to conveying pipes (95) staggered with the boosting pipe (91), and the end of the conveying pipe (95) away from the distribution rack (94) is connected to a first rotating end (96), and the inner cavity of the first rotating end (96) is rotatably connected to a first connecting end (97) that is integrally matched with the hollow tube (85).

7. A cracking reaction device for naphtha production according to claim 6, It is characterized in that The first-stage cracking tank (55) and the second-stage cracking tank (56) are connected to each other on all four sides thereof with a first-stage discharge pipe (11), and a first electric-controlled valve is arranged on the first-stage discharge pipe (11).

8. A cracking reaction device for naphtha production according to claim 7, It is characterized in that One side of the bottom of the secondary cracking tank (56) is connected to a secondary discharge pipe (12), and a second electric control valve is arranged on the secondary discharge pipe (12).

9. A cracking reaction device for naphtha production according to claim 8, It is characterized in that A temperature sensor (13) is embedded in the inner end of the five-way valve (68), and both upper and lower ends of the main pipe (74) are connected to electronic digital pressure gauges.

10. A cracking reaction device for naphtha production according to claim 9, It is characterized in that A check valve (14) is embedded at one end of the hollow tube (85) close to the auxiliary synchronous wheel (83), and a pressure sensor (15) is embedded at the inner end of the three-way valve (92).

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