Bromine fixation device, bromine fixation equipment and bromine fixation process

Abstract

The present application provides a bromine solidification device, a bromine solidification equipment and a bromine solidification process, and relates to the field of bromine solidification technology. A bromine solidification device comprises a first heating chamber and a first roller, wherein the inner wall of the first roller is provided with at least one material raising assembly, and the material raising assembly comprises a first material raising plate group and at least one second material raising plate group. The first material raising plate group comprises a plurality of first material raising plates arranged along the circumference of the first roller, and the second material raising plate group comprises a plurality of second material raising plates arranged along the circumference of the first roller. The first material raising plate group and the second material raising plate group are provided to improve the full reaction of the bromine solidification agent and the decomposition gas. The first material raising plate is a curved structure, which can push the bromine solidification agent to move in the direction of the bromine solidification device outlet, and then combined with the second material raising plate, the bromine solidification agent at the bottom of the bromine solidification device is brought to a certain height, and the bromine solidification agent is sprinkled from the through hole of the second material raising plate, so that the first roller is filled with the bromine solidification agent, and then the bromine solidification agent fully fixes bromine on the gas, thereby achieving a better bromine solidification effect.

Description

Technical Field

[0001] The present application relates to the field of bromine solidification technology, and in particular, to a bromine solidification device, a bromine solidification equipment and a bromine solidification process. Background Art

[0002] Waste circuit boards contain abundant recyclable resources such as metals, plastics, and glass fibers, and have high recycling value. At present, the main process for treating waste circuit boards is to decompose raw materials at high temperature, condense and recover cracking oil, and debrominate flue gas. However, this treatment method has a low bromine recovery rate, and the bromine contained in cracking oil is difficult to utilize. Summary of the invention

[0003] The purpose of the present application is to provide a bromine fixation device, a bromine fixation equipment and a bromine fixation process to improve the technical problems of poor bromine fixation effect, low bromine recovery rate and bromine content in cracking oil.

[0004] In the first aspect, the embodiment of the present application provides a bromine solidification device, comprising a first heating chamber and a first roller, the first roller is arranged in the first heating chamber, and the first roller is configured to be able to rotate relative to the first heating chamber; the first roller has an inlet and an outlet, and the inlet is provided with a feeding trough for conveying materials into the first roller. The inner wall of the first roller is provided with at least one material lifting assembly, the material lifting assembly includes a first material lifting plate group and at least one second material lifting plate group, the first material lifting plate group is arranged on the side of the second material lifting plate group close to the inlet of the first roller; the first material lifting plate group includes a plurality of first material lifting plates arranged along the circumference of the first roller, and the second material lifting plate group includes a plurality of second material lifting plates arranged along the circumference of the first roller. One end of the first material lifting plate is connected to the first roller, and the other end is bent in a direction close to the second material lifting plate, so as to push the material in the first roller to move in a direction close to the outlet; the plate body of the second material lifting plate is provided with a plurality of through holes, one end of the second material lifting plate is connected to the first roller, and the other end is bent in a direction away from the first material lifting plate, so as to drive the material in the first roller to move to a certain height and spill, so that the first roller is filled with materials.

[0005] The bromine-fixing device provided by the present application improves the full reaction of the bromine-fixing agent and the decomposed gas by setting the first lifting plate group and the second lifting plate group. When the first drum rotates, the first drum drives the first lifting plate and the second lifting plate to rotate. The first lifting plate is a curved structure, which can push the bromine-fixing agent to move in the direction of the outlet of the bromine-fixing device. Combined with the second lifting plate, the bromine-fixing agent at the bottom of the bromine-fixing device is brought to a certain height, and the bromine-fixing agent is sprinkled from the through hole of the second lifting plate, so that the first drum is filled with the bromine-fixing agent, and then the bromine-fixing agent fully fixes bromine on the gas, achieving a better bromine-fixing effect, reducing the bromine content of the pyrolysis oil and other gases, and improving the recovery rate of bromine.

[0006] In a possible implementation, the material lifting assembly includes at least two second material lifting plate groups, and the second material lifting plates in two adjacent second material lifting plate groups do not completely overlap along the axis direction of the first roller.

[0007] Since the solid bromine device reacts with gas, the full contact between gas and solid has a great influence on the effect of solid bromine. The material raising assembly includes at least two second material raising plate groups, which can increase the spreading range of the solid bromine agent and the contact area between gas and solid, so that the gas and solid bromine agent react fully. The second material raising plates in two adjacent second material raising plate groups do not completely overlap along the axis direction of the first roller, which can further increase the spreading range of the solid bromine agent.

[0008] In a possible implementation, the material lifting assembly includes at least three second material lifting plate groups, and the second material lifting plates in any two second material lifting plate groups do not completely overlap along the axis direction of the first roller.

[0009] The material raising assembly includes at least three second material raising plate groups, which can increase the spreading range of the bromine-fixing agent, increase the contact area between the gas and the solid, and make the gas and the bromine-fixing agent fully react. The second material raising plates in any two second material raising plate groups do not completely overlap along the axis direction of the first drum, which can further increase the spreading range of the bromine-fixing agent, so that the bromine-fixing agent fills the interior of the first drum.

[0010] In a possible implementation, the angle between two adjacent second lifting plates in the second lifting plate group corresponds to the circumferential angle of the first roller being α, and the minimum angle of the second lifting plates belonging to any two second lifting plate groups in the axial direction of the first roller corresponds to the circumferential angle of the first roller being α / 3-α / 2.

[0011] This structure enables the bromine-fixing agent to uniformly fill the space in the first drum, so that the bromine-fixing agent and the gas are fully mixed and reacted.

[0012] In a possible implementation, a plurality of material lifting assemblies are disposed in the first drum, and the plurality of material lifting assemblies are arranged along the axial direction of the first drum.

[0013] Multiple material-raising components can increase the spreading amount and spreading range of the bromine-fixing agent, increase the contact area between the bromine-fixing agent and the gas, and improve the bromine-fixing effect.

[0014] In a possible implementation, the bending angle of the first lifting plate is greater than 60 degrees. Optionally, the bending angle of the second lifting plate is 90-150 degrees. More optionally, a plurality of through holes are arranged in an array on the second lifting plate.

[0015] The curved structure enables the first lifting plate to better push the bromine-fixing agent in the first drum toward the outlet, so that the second lifting plate increases the spreading amount. A plurality of through holes are arranged in an array on the second lifting plate so that the first drum is evenly filled with bromine-fixing agent.

[0016] In a second aspect, a bromine fixing device is provided, comprising a decomposition device and the above-mentioned bromine fixing device, wherein the outlet of the decomposition device is connected to the inlet of the bromine fixing device, so that the gas decomposed by the decomposition device enters the bromine fixing device.

[0017] The bromine fixation equipment provided by the present application includes a decomposition device and a bromine fixation device, wherein the material is decomposed at high temperature by the decomposition device, and the obtained gas is then fixed with bromine at high temperature by the bromine fixation device. The material is fully fixed with bromine to improve the bromine fixation effect, so that the bromine content in the decomposed gas such as pyrolysis oil and pyrolysis non-condensable gas is substantially zero.

[0018] In a possible implementation, the decomposition device includes a second heating chamber and a second roller, the second roller is arranged in the second heating chamber, and the second roller is configured to be able to rotate relative to the second heating chamber. The outlet of the second roller is connected to the inlet of the first roller. The inner wall of the second roller is provided with a plurality of fin groups arranged along the axial direction of the second roller, each fin group includes a plurality of fins arranged along the circumference of the second roller, and the fin group is configured to push the material in the second roller to move in a direction close to the outlet of the second roller.

[0019] The decomposition device promotes the movement of the material through the synchronous movement of the fin group and the second roller, so that the material automatically moves from the entrance to the exit of the second roller, and during the movement, the material is turned and stirred through the action of the fin group on the material, so that the material is fully decomposed.

[0020] In a third aspect, a bromine fixing process is provided, wherein the decomposition gas of the bromine-containing material is fixed with bromine using the above-mentioned bromine fixing device, including: mixing the decomposition gas of the bromine-containing material with the bromine fixing agent transported to the first drum and reacting them in the first drum.

[0021] By decomposing the material at high temperature and solidifying bromine at high temperature, the material is fully solidified with bromine, and the recovery rate of bromine can reach 98.5%-100%, so that the bromine content in the decomposition gas such as pyrolysis oil and pyrolysis non-condensable gas is basically zero. The solid bromine process is suitable for large pieces of materials and small particles, has a wide range of applications, and is easy to promote and use in industrialization.

[0022] In one possible implementation, during the bromine solidification process, the minimum length of the first drum fully sprinkled with the bromine solidifying agent is one third of the length of the first drum, generally one third to one half, and the minimum height of the bromine solidifying agent in the first drum in the vertical direction is greater than one quarter of the inner diameter of the first drum.

[0023] The added amount of bromine-fixing agent enables the first lifting plate group and the second lifting plate group to sprinkle a sufficient amount of bromine-fixing agent in the first drum and fill the space of the first drum when the first drum rotates, so that the decomposed gas in the first drum can fully react with the bromine-fixing agent, achieving a better bromine-fixing effect and reducing the bromine content in the gas to a large extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments 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.

[0025] Figure 1 A schematic diagram of the structure of a bromine fixation device provided in an embodiment of the present application;

[0026] Figure 2 A schematic structural diagram of a fin assembly provided in an embodiment of the present application from a first perspective;

[0027] Figure 3 A schematic structural diagram of a fin assembly from a second perspective provided in an embodiment of the present application;

[0028] Figure 4 A schematic diagram of the structure of the material lifting assembly provided in an embodiment of the present application;

[0029] Figure 5 A schematic diagram of the structure of the first lifting plate group provided in an embodiment of the present application;

[0030] Figure 6 A schematic diagram of the structure of a first lifting plate provided in an embodiment of the present application;

[0031] Figure 7 A schematic diagram of a first structure of a second lifting plate group provided in an embodiment of the present application;

[0032] Figure 8 A schematic diagram of the structure of a second lifting plate provided in an embodiment of the present application;

[0033] Fig. 9 A second structural schematic diagram of the second lifting plate group provided in an embodiment of the present application;

[0034] Fig.10 This is a schematic diagram of the third structure of the second lifting plate group provided in an embodiment of the present application.

[0035] Icons: 10- bromine solidification equipment; 100- decomposition device; 110- second heating chamber; 120- second roller; 121- fin group; 123- fin; 130- feeder; 140- discharge port; 200- bromine solidification device; 210- first heating chamber; 220- first roller; 221- material lifting assembly; 223- first material lifting plate group; 224- first material lifting plate; 225- second material lifting plate group; 226- second material lifting plate; 227- through hole; 230- feed trough; 240- material baffle plate; 300- rotating device. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians of the art without making creative work are within the scope of protection of the present application.

[0037] In the description of the present application, it should be noted that the terms “first” and “second” are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0038] Some implementation methods of the present application are described in detail below in conjunction with the accompanying drawings.

[0039] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of the bromine fixation device 10 provided in this embodiment.

[0040] The present embodiment provides a bromine-fixing device 10, which is used to process waste plate materials to fix the bromine in the waste plate materials, reduce the bromine content in the product, and reduce the harm to the environment. The bromine-fixing device 10 includes a decomposition device 100 and a bromine-fixing device 200. The decomposition device 100 is used to perform a high-temperature decomposition of the material, and the bromine-fixing device 200 is used to fix the bromine of the decomposed gas. It should be noted that the material can also be fixed with bromine once while being subjected to high-temperature decomposition in the decomposition device 100, and the product can be fixed with bromine twice in the bromine-fixing device 200. The outlet of the decomposition device 100 is connected to the inlet of the bromine-fixing device 200, so that the gas decomposed by the decomposition device 100 enters the bromine-fixing device 200.

[0041] In some embodiments of the present application, the decomposition device 100 includes a second heating chamber 110 and a second roller 120. The second roller 120 is disposed in the second heating chamber 110 and is configured to rotate relative to the second heating chamber 110. Figure 1 The two ends of the second roller 120 in the present application are connected to the rotating device 300, and the rotating device 300 drives the second roller 120 to rotate. The second roller 120 is dynamically sealed and connected to the second heating chamber 110. The rotating device 300 is a common device in the technical field, generally including a motor, a reducer, a gear, a supporting wheel, etc. As a connection method, a large gear ring and a wheel belt are provided on the outer surface of the second roller 120, and the second roller 120 is connected to the rotating device 300 through the large gear ring and the wheel belt.

[0042] Please refer to Figure 2 and Figure 3 , Figure 2 and Figure 3 : is a schematic diagram of the structure of the fin group 121. The inner wall of the second roller 120 is provided with a plurality of fin groups 121 arranged along the axial direction of the second roller 120, and each fin group 121 includes a plurality of fins 123 arranged along the circumferential direction of the second roller 120. One end of the fin 123 is fixedly connected to the second roller 120, and the other end extends toward the central axis of the second roller 120. In some embodiments of the present application, each fin group 121 is inclined relative to the axis of the second roller 120 in the axial section of the second roller 120. This structure enables the fin group 121 to push the material to move toward the direction close to the outlet of the second roller 120 during the rotation of the second roller 120. In other embodiments of the present application, the plurality of fins 123 are spirally arranged along the inner wall of the second roller 120.

[0043] When the material is in powdery or small particle structure, a bromine-fixing agent can be added to the second drum 120, that is, the bromine-fixing agent is added in the high temperature decomposition stage to achieve the conversion and fixation of most of the bromine. In order to make the material and the bromine-fixing agent evenly mixed in the second drum 120, the fins 123 in each fin group 121 are arranged at intervals. This structure increases the collision between the material and the bromine-fixing agent during the movement of the second drum 120, which helps the mixing of the material and the bromine-fixing agent. In this embodiment, the fins 123 in each fin group 121 are arranged at equal intervals. When the material is a large-sized block material, the bromine-fixing agent can be omitted in the high temperature decomposition stage of the material, and a small amount of lime is added to maintain the alkaline reaction system, reduce the generation of dioxins, and perform bromine fixation in the bromine-fixing device 200.

[0044] The material to be processed, such as broken waste circuit boards, enters the second roller 120 from the entrance of the second roller 120, and the second heating chamber 110 heats the material in the second roller 120, so that the material is subjected to high-temperature decomposition. At the same time, the second roller 120 rotates, and the material moves from the entrance of the second roller 120 to the exit of the second roller 120 under the action of the fin group 121, so that the residue after high-temperature decomposition moves to the exit of the second roller 120, and then discharged from the second roller 120. In some embodiments of the present application, a feeder 130 is provided at the entrance of the second roller 120 for conveying materials into the second roller 120, and a discharge port 140 is provided at the exit of the second roller 120 for recovering high-temperature treatment slag. The gas generated by high-temperature decomposition enters the bromine fixation device 200 for bromine fixation.

[0045] It should be noted that the provision of the feeder 130 and the discharge port 140 does not affect the rotation of the second roller 120. As an achievable manner, the second roller 120 is connected to the feeder 130 via a drum cover, the second roller 120 is dynamically sealedly connected to the drum cover, and the drum cover is fixedly connected to the feeder 130. The second roller 120 is dynamically sealedly connected to the discharge port 140.

[0046] The bromine solidification device 200 includes a first heating chamber 210 and a first roller 220. The first roller 220 is disposed in the first heating chamber 210. The first roller 220 is dynamically sealed and connected to the first heating chamber 210, that is, the first roller 220 can rotate relative to the first heating chamber 210. In this embodiment, both ends of the first roller 220 are connected to the rotating device 300, and the second roller 120 is driven to rotate by the rotating device 300. The first roller 220 has an inlet and an outlet. The inlet of the first roller 220 is connected to the outlet of the second roller 120. The inlet of the first roller 220 is provided with a feed trough 230 for conveying materials into the first roller 220. Since the first roller 220 and the second roller 120 can rotate, the first roller 220 and the second roller 120 are dynamically sealed and connected. One end of the feed trough 230 extends into the first roller 220 from the center of the inlet of the first roller 220, so that the feed trough 230 can convey the bromine solidification agent during the rotation of the first roller 220.

[0047] The bromine-fixing agent conveyed by the feeding trough 230 to the first roller 220 will initially accumulate at the entrance of the first roller 220, and there is a discharge port 140 between the first roller 220 and the second roller 120. In order to prevent the bromine-fixing agent from falling into the discharge port 140, a baffle plate 240 is provided at the entrance of the first roller 220. In some embodiments of the present application, the baffle plate 240 is a trapezoidal structure, and an entrance is provided at the center of the baffle plate 240. In other embodiments of the present application, the baffle plate 240 may be a flat plate structure.

[0048] Since the bromine solidification device 200 is a reaction between gas and solid, the full contact between gas and solid has a great influence on the effect of bromine solidification. Figure 4 In order to increase the contact area between the gas and the solid so that the gas and the bromine-fixing agent react fully, the inner wall of the first drum 220 is provided with at least one material lifting assembly 221, which includes a first material lifting plate group 223 and at least one second material lifting plate group 225. The first material lifting plate group 223 is used to push the bromine-fixing agent in the first drum 220 to move toward the outlet, and the second material lifting plate group 225 is used to drive and sprinkle the bromine-fixing agent so that the bromine-fixing agent fills the interior of the first drum 220. The first material lifting plate group 223 is arranged on the side of the second material lifting plate group 225 close to the entrance of the first drum 220. This structure enables the first material lifting plate group 223 to first push the bromine-fixing agent at the entrance of the first drum 220, and then sprinkle the bromine-fixing agent through the second material lifting plate group 225.

[0049] Please refer to Figure 5 , Figure 5 Schematic diagram of the structure of the first lifting plate group 223. In some embodiments of the present application, the first lifting plate group 223 includes a plurality of first lifting plates 224 arranged along the circumference of the first roller 220, one end of the first lifting plate 224 is connected to the first roller 220, and the other end is bent toward the direction close to the second lifting plate 226. The bending structure enables the first lifting plate 224 to better push the solid bromine agent in the first roller 220 to move toward the outlet. Please refer to Figure 6 , Figure 6 Schematic diagram of the structure of the first lifting plate 224. Furthermore, the bending angle of the first lifting plate 224 is greater than 60 degrees, and the bending angle refers to the angle between the tangent lines of the two end plate surfaces of the first lifting plate 224. Among them, the bending direction of the first lifting plate 224 can also be adjusted as needed, so that the pushing effect of the first lifting plate 224 is better. In this embodiment, a first lifting plate group 223 includes sixteen first lifting plates 224 arranged at equal intervals. In other embodiments of the present application, the number and spacing of the first lifting plates 224 in a first lifting plate group 223 can be adjusted as needed.

[0050] Please refer to Figure 7 and Figure 8 , Figure 7 is a structural schematic diagram of the second lifting plate group 225, Figure 82 is a schematic diagram of the structure of the second lifting plate 226. The second lifting plate group 225 includes a plurality of second lifting plates 226 arranged along the circumference of the first roller 220. The structure of the second lifting plate 226 is different from that of the first lifting plate 224. The plate body of the second lifting plate 226 is provided with a plurality of through holes 227. One end of the second lifting plate 226 is connected to the first roller 220, and the other end is bent in a direction away from the first lifting plate 224. The bending structure of the second lifting plate 226 can drive the solid bromine agent in the first roller 220 to move to a certain height with the rotation of the first roller 220. During the movement, the solid bromine agent on the second lifting plate 226 falls from the through hole 227, so that the solid bromine agent can fully react with the gas in the first roller 220. Further, in order to fill the first roller 220 with the solid bromine agent, the bending angle of the second lifting plate 226 is 90-150 degrees. The bending direction of the second lifting plate 226 can be adjusted as needed. In other embodiments of the present application, the second lifting plate 226 may be spiral, and the present application does not limit its bending form. Furthermore, in order to make the first roller 220 evenly filled with the bromine-fixing agent, a plurality of through holes 227 are arranged in an array on the second lifting plate 226 .

[0051] In the present application, multiple second lifting plates 226 in a second lifting plate group 225 are arranged at equal intervals, and gaps will appear during the lifting process. In order to expand the lifting range, the lifting assembly 221 includes at least two second lifting plate groups 225, and the second lifting plates 226 in two adjacent second lifting plate groups 225 do not completely overlap along the axis direction of the first roller 220. This structure makes the lifting range of two adjacent lifting plate groups different, expanding the contact range between the solid bromine agent and the gas. Among them, the lifting assembly 221 includes at least three second lifting plate groups 225, and the second lifting plates 226 in any two second lifting plate groups 225 do not completely overlap along the axis direction of the first roller 220.

[0052] Furthermore, the angle between two adjacent second lifting plates 226 in the second lifting plate group 225 corresponds to the circumferential angle of the first roller 220 as α, and the minimum angle between the second lifting plates 226 in any two second lifting plate groups 225 in the circumferential direction of the first roller 220 corresponds to the circumferential angle of the first roller 220 as α / 3-α / 2. This structure allows the second lifting plates 226 in multiple second lifting plate groups 225 to be staggered, so that the spreading range of each second lifting plate group 225 is different.

[0053] In this embodiment, a plurality of material lifting assemblies 221 are disposed in the first roller 220 along the axial direction of the first roller 220. Each material lifting assembly 221 includes a first material lifting plate group 223 and three second material lifting plate groups 225. Figure 7 , Fig. 9 and Fig.10 , Figure 7, Fig. 9 and Fig.10 The schematic diagrams are respectively the structures of three second material lifting plate groups 225 in a material lifting assembly 221. The angle between two adjacent second material lifting plates 226 in the second material lifting plate group 225 corresponds to the circumferential angle of the first roller 220 as α, the minimum angle of the second material lifting plates 226 in the two adjacent second material lifting plate groups 225 in the axial direction of the first roller 220 corresponds to the circumferential angle of the first roller 220 as α / 3, and the minimum angle of the second material lifting plates 226 in the two separated second material lifting plate groups 225 in the axial direction of the first roller 220 corresponds to the circumferential angle of the first roller 220 as 2α / 3. This structure enables the solid bromine agent to evenly fill the space in the first roller 220, so that the solid bromine agent and the gas are fully mixed and reacted. In other embodiments of the present application, the number of the first material lifting plate 224 and the second material lifting plate 226 can be adjusted according to actual needs, and the present application does not limit it.

[0054] The first heating chamber 210 heats the first roller 220, and the first roller 220 rotates under the driving action of the rotating device 300. The solid bromine agent enters the first roller 220 through the feed trough 230, and the gas generated by the decomposition device 100 enters the first roller 220. The solid bromine agent is pushed from the entrance of the first roller 220 to the exit of the first roller 220 by the first material lifting plate group 223 in the plurality of material lifting components 221, and then the solid bromine agent in the first roller 220 is fully spread through the plurality of second material lifting plate groups 225, so that the solid bromine agent and the gas fully react. The solid bromine slag after the reaction is discharged through the outlet of the first roller 220, and the gas after solid bromine is subjected to subsequent oil and gas separation, non-condensable gas purification and other processes through the gas channel.

[0055] The bromine fixation device 10 performs high-temperature decomposition of the material through the decomposition device 100, and then performs high-temperature bromine fixation of the obtained gas through the bromine fixation device 200. The bromine fixation device 200 is provided with a first material lifting plate 224 and a second material lifting plate 226. When the first roller 220 rotates, the first material lifting plate 224 and the second material lifting plate 226 are driven to rotate. The first material lifting plate 224 is a curved structure, which can push the bromine fixation agent to move toward the outlet of the bromine fixation device 200. Combined with the second material lifting plate 226, the bromine fixation agent at the bottom of the bromine fixation device 200 is brought to a certain height. The bromine fixation agent falls from the through hole 227 of the second material lifting plate 226, so that the first roller 220 is filled with the bromine fixation agent, and then the bromine fixation agent fully fixes the gas, achieving a better bromine fixation effect, reducing the bromine content of the cracked oil and other gases, and improving the recovery rate of bromine.

[0056] The present application also provides a bromine fixation process, which uses the above-mentioned bromine fixation device to fix bromine on the decomposition gas of bromine-containing materials. The current bromine fixation process generally chooses to debrominate the non-condensable gas after high-temperature decomposition and condensation recovery of cracking oil. This treatment method has a low bromine recovery rate and the bromine content of the cracking oil is difficult to utilize. The present application performs two-stage high-temperature reactions on the bromine-containing material and uses an improved bromine fixation device to improve the bromine fixation effect on the decomposition gas of the bromine-containing material. It is suitable for different types of materials, and the bromine content of the cracking oil and the cracking non-condensable gas is basically zero.

[0057] Furthermore, the bromine-fixing process provided in the present application uses the above-mentioned bromine-fixing equipment to fix bromine on bromine-containing materials. The bromine-containing material is subjected to high-temperature decomposition in the decomposition device. In this step, a bromine-fixing agent can be added as needed. The residue obtained by decomposition is discharged from the discharge port, and the decomposed gas enters the bromine-fixing device for bromine fixation. The decomposed gas and the bromine-fixing agent undergo high-temperature bromine fixation reaction in the decomposition device, and the obtained residue is discharged from the discharge port. The gas after bromine fixation undergoes subsequent processes. When the bromine-containing material is a bulk material, the material undergoes a high-temperature decomposition reaction in the decomposition device. No bromine-fixing agent is added at this stage. A very small amount of lime is added to maintain an alkaline reaction system to prevent the formation of dioxins. A bromine-fixing agent is added to the bromine-fixing device for bromine fixation. When the bromine-containing material is a small particle or powder, the bromine-containing material reacts with the bromine-fixing agent at high temperature in the decomposition device to achieve the conversion and fixation of most of the bromine. The decomposed gas is then subjected to bromine fixation through the bromine-fixing device, so that the obtained cracking oil and cracking gas are almost free of bromine.

[0058] In some embodiments of the present application, the bromine solidification process includes: decomposing the bromine-containing material in the second drum of the decomposition device at a high temperature of 400-600°C, and reacting for 20-40 minutes. The gas produced by the decomposition moves from the second drum to the first drum, and then mixes and reacts with the bromine solidification agent transported to the first drum by the feed trough at a condition above 300°C. The bromine solidification agent in the embodiments of the present application can be a mixture of sodium carbonate and lime. The addition rate of the bromine solidification agent in the present application is adjusted according to the addition rate of the bromine-containing material of the decomposition device. Generally, the addition rate of the sodium element in the bromine solidification agent is 1.2-2 times the addition rate of the bromine element in the bromine-containing material.

[0059] In order to improve the reaction efficiency of the gas and the bromine-fixing agent in the bromine-fixing device, during the bromine-fixing process, the minimum length of the first drum fully sprinkled with the bromine-fixing agent is one-third of the length of the first drum, generally one-third to one-half, and the minimum height of the bromine-fixing agent in the first drum in the vertical direction is greater than one-quarter of the inner diameter of the first drum. It should be noted that the height refers to the size of the bromine-fixing agent in the first drum in the vertical direction. The added amount of bromine-fixing agent can make the first and second lifting plate groups sprinkle a sufficient amount of bromine-fixing agent in the first drum when the first drum is rotating, and fill the space of the first drum, so that the decomposed gas in the first drum fully reacts with the bromine-fixing agent, achieving a better bromine-fixing effect and reducing the bromine content in the gas to a large extent.

[0060] The bromine solidification process fully solidifies the material by high-temperature decomposition and high-temperature bromine solidification. The bromine recovery rate can reach 98.5%-100%, making the bromine content in the decomposed gas such as pyrolysis oil and pyrolysis non-condensable gas basically zero. The bromine solidification process is suitable for large-block materials and small-particle materials, has a wide range of applications, and is easy to promote and use in industrialization.

[0061] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A bromine solidification device, characterized in that: include a first heating chamber; and A first roller, the first roller is disposed in the first heating chamber, the first roller is configured to be rotatable relative to the first heating chamber; the first roller has an inlet and an outlet; The inner wall of the first roller is provided with at least one material lifting assembly, the material lifting assembly includes a first material lifting plate group and at least one second material lifting plate group, the first material lifting plate group is arranged on a side of the second material lifting plate group close to the entrance of the first roller; the first material lifting plate group includes a plurality of first material lifting plates arranged along the circumference of the first roller, and the second material lifting plate group includes a plurality of second material lifting plates arranged along the circumference of the first roller; One end of the first lifting plate is connected to the first roller, and the other end is bent in a direction close to the second lifting plate, so as to push the material in the first roller to move in a direction close to the outlet; the plate body of the second lifting plate is provided with a plurality of through holes, one end of the second lifting plate is connected to the first roller, and the other end is bent in a direction away from the first lifting plate, so as to drive the material in the first roller to move to a certain height and spill, so that the first roller is filled with the material; The included angle of two adjacent second material lifting plates in the second material lifting plate group corresponding to the circumferential angle of the first roller is α, and the minimum included angle of the second material lifting plates in any two second material lifting plates group on the circumferential direction of the first roller corresponding to the circumferential angle of the first roller is α / 3-α / 2; The bending angle of the first lifting plate is greater than 60 degrees, the bending angle of the second lifting plate is 90-150 degrees, and the plurality of through holes are arranged in an array on the second lifting plate.

2. The bromine solidification device according to claim 1, characterized in that: The material lifting assembly includes at least two second material lifting plate groups, and the second material lifting plates in two adjacent second material lifting plate groups do not completely overlap along the axis direction of the first roller.

3. The bromine solidification device according to claim 1, characterized in that: The material lifting assembly includes at least three second material lifting plate groups, and the second material lifting plates in any two of the second material lifting plate groups do not completely overlap along the axis direction of the first roller.

4. The bromine solidification device according to any one of claims 1 to 3, characterized in that: A plurality of the material lifting assemblies are arranged in the first roller, and the plurality of the material lifting assemblies are arranged along the axial direction of the first roller.

5. A bromine solidification device, characterized in that: It comprises a decomposition device and a bromine fixing device as claimed in any one of claims 1 to 4, wherein the outlet of the decomposition device is connected to the inlet of the bromine fixing device, so that the gas decomposed by the decomposition device enters the bromine fixing device; The decomposition device includes a second heating chamber; as well as a second roller, the second roller being disposed in the second heating chamber, the second roller being configured to be rotatable relative to the second heating chamber, and the outlet of the second roller being communicated with the inlet of the first roller; The inner wall of the second drum is provided with a plurality of fin groups arranged along the axial direction of the second drum, each of the fin groups includes a plurality of fins arranged along the circumference of the second drum, and the fin groups are configured to push the material in the second drum to move toward the direction close to the outlet of the second drum.

6. A bromine solidification process, characterized in that: The bromine fixing device according to any one of claims 1 to 4 is used to fix bromine on the decomposition gas of the bromine-containing material, comprising: mixing and reacting the decomposition gas of the bromine-containing material with the bromine fixing agent transported to the first drum in the first drum.

7. The bromine solidification process according to claim 6, characterized in that: During the bromine solidification process, the minimum length of the first drum fully sprinkled with the bromine solidifying agent is one third of the length of the first drum, and the minimum height of the bromine solidifying agent in the first drum in the vertical direction is greater than one fourth of the inner diameter of the first drum.

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