Efficient dedusting and heating system and method for yellow phosphorus furnace gas

Abstract

The invention discloses an efficient dedusting and heating system and method for yellow phosphorus furnace gas, and particularly relates to the technical field of yellow phosphorus production.The system comprises a furnace gas conveying pipe, a cyclone separator and a plurality of airflow partition assemblies, the airflow partition assemblies are evenly distributed on a gas outlet and the side wall of a cylinder part, and each airflow partition assembly comprises a gas spraying pipe; inclined air blowing flow channels are formed in the air inlet and the side wall of the cylinder part and communicate with an air spraying pipe, and the air spraying pipe is connected with a high-pressure hot air source. While the cyclone separator is used for dust separation, high-pressure hot airflow is input through the airflow partition assembly, rotation of furnace gas in the cyclone separator is accelerated, the dust separation efficiency is improved, meanwhile, yellow phosphorus furnace gas can be further heated, the phenomenon of dewing of the furnace gas can be reduced, blockage is avoided, the equipment transformation cost is low, and the equipment is suitable for popularization and application. Energy consumption is relatively low, and a large amount of phosphorus sludge can be finally eliminated.

Description

Technical Field

[0001] The invention relates to the technical field of yellow phosphorus production, and more particularly to a yellow phosphorus furnace gas high-efficiency dust removal and heating system and method. Background Art

[0002] Yellow phosphorus is an allotrope of the non-metallic element phosphorus. It is one of the most common forms of phosphorus. Yellow phosphorus is mainly used in the production of phosphoric acid, which is the basic raw material for the manufacture of fertilizers, food additives, detergents and many other products. In addition, yellow phosphorus is also used in the production of pesticides, flame retardants, etc. In chemical research, yellow phosphorus is used as an important reagent for the synthesis of other phosphorus compounds.

[0003] The industrially applied electric furnace yellow phosphorus production process is divided into the production process using a large self-baking electrode phosphorus electric furnace and the production process using a multi-electrode phosphorus electric furnace. Although these two processes differ in terms of the type and scale of the electric furnace, the requirements for processing raw materials entering the furnace, and the measures for dust removal of furnace gas, the main processes are basically the same, that is, a mixture of phosphate ore, silica and coke in proportion is fed into the electric furnace, and the mixture in the electric furnace undergoes a reduction reaction to generate furnace gas, which escapes from the reaction melting zone, passes through the furnace gas filter layer formed by the continuously replenished mixture in the upper part of the furnace, and is discharged from the electric furnace with a part of the impurities in the mixture, and then undergoes dust removal, condensation washing, and refining separation to obtain yellow phosphorus products, and the tail gas is recycled or discharged.

[0004] Among them, the dust in the furnace gas generated during the yellow phosphorus production process is mainly composed of tiny particles of raw materials and by-products used in the production process. These raw materials usually include phosphate rock, silica and coke. Under the high temperature of the electric furnace, these materials undergo chemical reactions to generate yellow phosphorus vapor and other gases, and also produce solid particulate matter. Therefore, the "phosphorus furnace gas" (from the electric furnace to the cooling tower) in the yellow phosphorus production process is mixed with a large amount of dust, which can reach 50 to 70 grams per cubic meter.

[0005] However, since the yellow phosphorus vapor eventually needs to be cooled by a cooling system and condensed into liquid yellow phosphorus, the existing technology uses a spray cooling tower to treat the yellow phosphorus furnace gas, which causes dust to come into contact with water and mix therein to form muddy phosphorus. At the same time, a large amount of cooling water is consumed, and a large amount of wastewater is subsequently generated, which not only greatly increases the steam consumption during crude phosphorus refining, but also brings about wastewater treatment problems.

[0006] Therefore, it is necessary to carry out dust removal during the furnace gas transportation process. Among them, the cyclone separator is widely used in the field of industrial dust removal and particle separation due to its unique design and efficient operation. It has high separation efficiency, simple structure, continuous operation, low maintenance cost, high temperature and corrosion resistance. Therefore, in the yellow phosphorus production process, a large number of cyclone separators are also used to separate the dust in the furnace gas, thereby reducing the subsequent generation of mud phosphorus and reducing production costs.

[0007] However, in actual use, since the heat of the furnace gas itself is easily dissipated during pipeline transportation, the furnace gas temperature is lower than the temperature at the circuit outlet. In particular, when the furnace gas enters the cyclone separator, although the dust will hit the inner wall of the separator to form separation, the yellow phosphorus vapor carried around the dust is also easy to form condensation due to the cooling caused by contact with the inner wall of the separator, making the dust adhere to the inner wall of the separator and difficult to separate. Long-term use will affect the separation effect of the separator, and also cause a certain amount of material waste. Summary of the invention

[0008] The invention provides a yellow phosphorus furnace gas high-efficiency dust removal and heating system and method, and aims to solve the problem that: in the existing yellow phosphorus furnace gas dust separation equipment, since the heat of the furnace gas is easily dissipated, when the yellow phosphorus vapor carried around the dust enters the cyclone separator, it is easy to form condensation due to the cooling caused by contact with the inner wall of the separator, so that the dust adheres to the inner wall of the separator and is difficult to separate.

[0009] To achieve the above object, the present invention provides the following technical solutions: a yellow phosphorus furnace gas high-efficiency dust removal and heating system, comprising a furnace gas conveying pipe, a cyclone separator and a plurality of groups of airflow blocking components, the cyclone separator comprising a cylindrical portion, a conical portion is arranged at the bottom of the cylindrical portion, an air inlet is arranged at the top edge of the cylindrical portion, an air outlet is arranged at the middle of the cylindrical portion, the air outlet extends upward out of the cylindrical portion, and the furnace gas conveying pipe is connected to the air inlet;

[0010] A plurality of groups of airflow partition components are evenly distributed on the air outlet and the side wall of the cylinder, the airflow partition components include an air jet pipe, and the air inlet and the side wall of the cylinder are both provided with an inclined blowing air channel, the inclined blowing air channel is connected to the air jet pipe, and the air jet pipe is connected to a high-pressure hot air source, and the high-pressure hot air source is used to provide a high-pressure hot air flow to the air jet pipe;

[0011] The inclined blowing flow channels on the air inlet and the cylindrical part are inclined relative to the normal lines of the air inlet and the cylindrical part side wall, respectively, wherein the inclined blowing flow channels are inclined toward the furnace gas flow direction at the air inlet or the inner wall of the cylindrical part.

[0012] In a preferred embodiment, the high-pressure hot gas source includes a high-pressure pump, a gas heater and a gas source. The gas source is a gas tank storing inert gas, which is connected to the high-pressure pump and the injection pipe through a gas pipeline. The gas heater is used to heat the gas source gas.

[0013] In a preferred embodiment, the cyclone separator includes an outer casing and an inner liner, the inner liner is arranged inside the outer casing, and an insulation layer is arranged between the outer casing and the inner liner.

[0014] In a preferred embodiment, flow equalizers are installed at positions corresponding to the jet pipes in the cylindrical portion, and the flow equalizers are fixedly mounted on the inner liner, and one side of the flow equalizer corresponding to the inner wall of the inner liner is an arc-shaped wall, which is integrated with the inner wall of the inner liner, and the flow equalizer is distributed along the height direction of the cylindrical portion, and the inclined blowing flow channel includes a first blowing flow channel and a second blowing flow channel, and the first blowing flow channel and the second blowing flow channel are both arranged in the flow equalizer, and the second blowing flow channel and the first blowing flow channel are arranged in sequence along the yellow phosphorus furnace gas direction of the inner wall of the cylindrical portion, and the second blowing flow channel and the first blowing flow channel are both connected to the jet pipe, and the angle between the output airflow direction of the first blowing flow channel and the normal to the side wall of the cylindrical portion is greater than the angle between the output airflow direction of the second blowing flow channel and the normal to the side wall of the cylindrical portion.

[0015] In a preferred embodiment, an arc-shaped cover plate is fixedly connected to the position of the flow equalizer corresponding to the first blowing flow channel. The arc-shaped cover plate is a thin-walled structure parallel to the inner wall of the inner liner, and a blowing gap is formed between the arc-shaped cover plate and the arc-shaped wall of the flow equalizer.

[0016] In a preferred embodiment, a mesh plate is provided at the flow equalizer corresponding to the second blowing air channel, the mesh plate is adapted to the inner wall shape of the inner liner, the mesh plate is located on the side of the second blowing air channel away from the first blowing air channel, and the mesh plate extends into the second blowing air channel.

[0017] In a preferred embodiment, the inner liner in the cylindrical portion is rotatably arranged in the outer protective tube of the cylindrical portion, and a hollow cavity is also arranged between the inner liner in the cylindrical portion and the insulation layer, the hollow cavity is interconnected with the jet pipe, the second blowing air channel and the first blowing air channel, and a driving device is arranged on the cylindrical portion, and the driving device is used to drive the inner liner to rotate along the rotation direction of the yellow phosphorus furnace gas in the cylindrical portion.

[0018] In a preferred embodiment, a flip movable frame is provided at a position on the current equalizer corresponding to the mesh plate, the mesh plate is fixedly mounted on the flip movable frame, the flip movable frame is rotatably mounted in the current equalizer, and an accommodating space for accommodating the swinging of the flip movable frame is provided at a position of the current equalizer corresponding to the flip movable frame.

[0019] In a preferred embodiment, a conical table is fixedly installed in the middle of the bottom end of the conical portion, and a heating component is arranged on the conical table. The heating component includes a rotating shaft, which is rotatably installed on the conical table, and a spiral blade is fixedly connected to the rotating shaft, and a heater is fixedly connected in the spiral blade.

[0020] A yellow phosphorus furnace gas high-efficiency dust removal and heating method comprises the following steps:

[0021] Step 1: Turn on the gas heater to heat the gas source, and use the high-pressure pump to transport the heated gas source to the injection pipe;

[0022] Step 2: close the discharge control valve and the delivery control valve on the furnace gas delivery pipe, so that the high-pressure hot air flow output by the jet pipe gradually fills the cyclone separator, and preheats the inner wall and inner cavity of the cyclone separator;

[0023] Step 3: After the temperature in the cyclone separator is preheated to above the dew point temperature of the yellow phosphorus furnace gas, the delivery control valve on the furnace gas delivery pipe is opened to deliver the yellow phosphorus furnace gas formed by the electric furnace to the cyclone separator for dust separation;

[0024] Step 4: increase the pumping pressure of the high-pressure pump, increase the flow rate of the output airflow of the inclined blowing air channel, and accelerate the rotation speed of the yellow phosphorus furnace gas in the cyclone separator;

[0025] Step 5. Close the delivery control valve on the furnace gas delivery pipe, continuously input high-pressure hot air flow into the cyclone separator through the jet pipe, and after all the yellow phosphorus furnace gas in the cyclone separator is discharged, close the delivery control valve at the air outlet, and then open the discharge control valve to discharge and collect the filtered dust.

[0026] The beneficial effects of the present invention are as follows: the present invention transmits a high-pressure hot air flow to the air inlet and the cylindrical part through the jet pipe and the inclined blowing air channel, thereby increasing the flow rate of the yellow phosphorus furnace gas and accelerating the centrifugal separation effect of the dust in the cylindrical part; at the same time, the high-pressure hot air flow ejected from the inclined blowing air channel forms a high-temperature area near the inner wall of the equipment, thereby avoiding the formation of low-temperature condensation and reducing the adhesion of dust inside the equipment; at the same time, the input hot air flow can also form a certain heating effect on the yellow phosphorus furnace gas in the cyclone separator, thereby avoiding the yellow phosphorus furnace gas from having a low temperature in the subsequent transportation process and condensation on the subsequent transportation pipeline to block the pipeline, thereby further improving the processing efficiency of the system and reducing the waste of product materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0028] Figure 2 The figure is a schematic diagram of the distribution of the airflow blocking components at the air inlet of the present invention.

[0029] Figure 3It is a schematic diagram of the distribution of the airflow partition assembly of the present invention in the cylindrical part.

[0030] Figure 4 It is a schematic diagram of the airflow state inside the cyclone separator when the present invention is working.

[0031] Figure 5 The schematic diagram of the improved structure of the airflow partition assembly of the present invention is

[0032] Figure 6 The present invention is based on Figure 5 An enlarged view of the structure of the improved flow equalizer of the airflow partition component.

[0033] Figure 7 This is a schematic diagram of the rotation state of the improved inner liner according to the present invention.

[0034] Figure 8 The present invention is based on Figure 7 Enlarged view of the drive device.

[0035] Fig. 9 For the present invention Figure 6 A-section structure enlarged view.

[0036] Fig.10 This is a schematic diagram of the structure of the present invention after a heating component is added to the bottom of the conical portion.

[0037] Fig.11 It is a schematic diagram of the overall structure of the heating component of the present invention.

[0038] Fig.12 The figure is a flow chart of the dust removal method of the present invention.

[0039] The accompanying drawings are marked as follows: 1. furnace gas conveying pipe; 2. cyclone separator; 21. cylindrical part; 22. conical part; 23. air inlet; 24. air outlet; 25. ash hopper; 26. discharge control valve; 27. conical platform; 201. outer casing; 202. inner lining tube; 203. insulation layer; 204. hollow cavity; 3. air flow partition assembly; 31. jet pipe; 32. inclined blowing air channel; 321. first blowing air channel; 3211. arc cover plate; 3212. blowing seam; 322. second blowing air channel; 4. flow equalizer; 41. mesh plate; 42. tilting movable frame; 5. driving device; 6. heating assembly; 61. rotating shaft; 62. spiral blade; 63. heater. DETAILED DESCRIPTION

[0040] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0041] Refer to the instruction manual Figures 1 to 11 , a yellow phosphorus furnace gas high-efficiency dust removal and heating system, comprising a furnace gas conveying pipe 1 and a cyclone separator 2, the cyclone separator 2 comprising a cylindrical portion 21, a conical portion 22 is arranged at the bottom of the cylindrical portion 21, an air inlet 23 is arranged at the top edge of the cylindrical portion 21, an air outlet 24 is arranged at the middle of the cylindrical portion 21, the air outlet 24 extends upward out of the cylindrical portion 21, the furnace gas conveying pipe 1 is connected to the air inlet 23, in actual use, the yellow phosphorus furnace gas enters the cyclone separator 2 through the air inlet 23, so that under the guidance of the design of the air inlet 23, the gas is forced to enter along the tangential direction of the cylinder 21 and generate a strong rotational motion, which causes the airflow to form a vortex, that is, an external rotational airflow (external rotational airflow), generating a central low-pressure area, with the rotation of the furnace gas, The particles therein are acted upon by centrifugal force, which is proportional to the mass of the particles and to the square of the rotation speed. Since the mass of the particles is greater than the mass of the gas molecules, the centrifugal force on the particles is also greater, which causes them to move toward the wall of the cyclone separator. When the particles contact the wall of the cyclone separator, due to the effect of gravity, they will slide down along the wall and eventually fall into the ash collecting hopper 25 at the bottom. At the same time, an upward inward rotating airflow (internal rotating airflow) will be formed in the center of the cyclone separator. This airflow is called "updraft" or "secondary airflow". This airflow is mainly composed of clean yellow phosphorus furnace gas from which the particles have been separated. It is discharged through the air outlet 24 at the top of the cyclone separator 2 and continues to be transported backward for subsequent treatment.

[0042] In the above embodiment, an air flow partition assembly 3 is also provided on the cyclone separator 2. Specifically, the air flow partition assembly 3 is evenly distributed on the air outlet 24 and the side wall of the cylindrical portion 21. The air flow partition assembly 3 includes a jet pipe 31. The air inlet 23 and the side wall of the cylindrical portion 21 are both provided with inclined blowing air channels 32. The inclined blowing air channels 32 are connected to the jet pipe 31. The jet pipe 31 is connected to a high-pressure hot air source, which is used to provide a high-pressure hot air flow to the jet pipe 31.

[0043] The inclined blowing flow channel 32 on the air inlet 23 and the cylindrical portion 21 is inclined relative to the normal of the air inlet 23 and the side wall of the cylindrical portion 21, respectively, wherein the inclined blowing flow channel 32 is inclined toward the air flow direction of the furnace gas at the air inlet 23 or the inner wall of the cylindrical portion 21, that is, in actual use, the high-pressure hot air flow can be transported to the air inlet 23 and the cylindrical portion 21 through the jet pipe 31 and the inclined blowing flow channel 32. The high-pressure hot air flow is inclinedly arranged, and after being integrated into the yellow phosphorus furnace gas, the flow rate of the yellow phosphorus furnace gas can be increased, and the centrifugal separation effect of the dust in the cylindrical portion 21 can be accelerated. At the same time, the high-pressure hot air flow ejected from the inclined blowing flow channel 32 will preferentially approach the air inlet 23 or the inner wall of the cylindrical portion 21. , so that a high-temperature area is formed near the inner wall of the equipment, and then when the yellow phosphorus furnace gas rotates to make the dust particles close to the air inlet 23 or the inner wall of the cylindrical part 21, low-temperature condensation will not be formed, thereby reducing the adhesion of dust inside the equipment. At the same time, the input hot air flow can also form a certain heating effect on the yellow phosphorus furnace gas in the cyclone separator 2, thereby being able to reduce the condensation phenomenon of the yellow phosphorus furnace gas in the cyclone separator 2 as a whole, and also can increase the temperature of the yellow phosphorus furnace gas output by the cyclone separator 2, to avoid the yellow phosphorus furnace gas in the subsequent transportation process The temperature is low and the condensation phenomenon on the subsequent transportation pipeline is avoided, which blocks the pipeline, further improves the processing efficiency of the system and reduces the waste of product materials.

[0044] Furthermore, the high-pressure hot gas source includes a high-pressure pump, a gas heater and a gas source, wherein, in order to avoid chemical reactions in the yellow phosphorus furnace gas, the above-mentioned gas source preferably stores a gas tank containing an inert gas (such as nitrogen), and the gas tank is connected to the high-pressure pump and the injection pipe 31 through a gas pipeline. The gas heater is arranged on the above-mentioned gas pipeline. The gas heater can be an electric heating device or other heating equipment, such as an electric furnace waste gas heat recovery device for producing yellow phosphorus furnace gas, to heat the gas pipeline. A heating chamber can also be provided, such as a heating furnace, to directly heat the gas source gas and finally transport it to the cyclone separator 2.

[0045] In order to improve the heating effect of the gas in the cyclone separator 2, refer to the attached manual. Figure 3 The cyclone separator 2 includes an outer casing 201 and an inner liner 202. The inner liner 202 is arranged inside the outer casing 201. An insulation layer 203 is arranged between the outer casing 201 and the inner liner 202. It should be noted that in order to improve the insulation effect, the cylindrical portion 21, the conical portion 22 and the air inlet 23 all adopt a combined structure of the outer casing 201, the inner liner 202 and the insulation layer 203. The ash hopper 25 and the air outlet 24 or other structures are selected according to actual needs.

[0046] In the above embodiment, since a high-pressure hot air flow is input through the airflow blocking component 3 while the cyclone separator 2 is used for dust separation, the rotation of the furnace gas in the cyclone separator 2 is accelerated to improve the dust separation efficiency, and the yellow phosphorus furnace gas can be further heated, which can reduce the condensation of the furnace gas and avoid blockage. The equipment modification cost is low, the energy consumption is relatively small, and a large amount of mud phosphorus can be eliminated in the end, the subsequent processing cost is reduced, the material waste is reduced, the production efficiency is improved, and energy conservation and emission reduction are reduced.

[0047] Furthermore, in the above-mentioned embodiment, in order to improve the heating effect on the inner wall of the cyclone separator 2, a group of hot air flow layers are preferentially formed on the inner wall of the cyclone separator 2, and the inclined blowing air channel 32 can be inclined as close to the inner wall of the cyclone separator 2 as possible. However, the heat radiation of the high-pressure hot air flow input to the inner area of ​​the cyclone separator 2 is relatively small, especially the internal space of the cylindrical portion 21 is relatively large, and the heating effect of the yellow phosphorus furnace gas in the cyclone separator 2 is relatively low. For this reason, the present embodiment further improves the airflow partition component 3, and refers to the attached specification. Figure 4 and Figure 5 , a flow equalizer 4 is installed at the position corresponding to the injection pipe 31 in the cylindrical portion 21, the flow equalizer 4 is fixedly installed on the inner liner 202, and the side of the flow equalizer 4 corresponding to the inner wall of the inner liner 202 is an arc-shaped wall, and the arc-shaped wall is integrated with the inner wall of the inner liner 202, the flow equalizer 4 is distributed along the height direction of the cylindrical portion 21, and the inclined blowing flow channel 32 includes a first blowing flow channel 321 and a second blowing flow channel 322, the first blowing flow channel 321 and the second blowing flow channel 322 are both arranged in the flow equalizer 4, the second blowing flow channel 322 and the first blowing flow channel 321 are sequentially arranged along the yellow phosphorus furnace gas direction of the inner wall of the cylindrical portion 21, the second blowing flow channel 322 and the first blowing flow channel 321 are both connected to the injection pipe 31, and the first blowing flow channel 321 and the second blowing flow channel 322 are both long strip slits. The structure is arranged along the height of the cylindrical portion 21, wherein the angle between the output airflow direction of the first blowing air channel 321 and the normal line of the side wall of the cylindrical portion 21 is greater than the angle between the output airflow direction of the second blowing air channel 322 and the normal line of the side wall of the cylindrical portion 21, that is, the output airflow direction of the first blowing air channel 321 is closer to the inner wall of the cylindrical portion 21, thereby forming a high-temperature and high-speed airflow layer near the inner wall of the cylindrical portion 21, which can accelerate the rotation of the yellow phosphorus furnace gas to separate the dust particles and form a stable high-temperature zone to avoid condensation on the inner wall of the cylindrical portion 21 to form attachment and blockage, while the output airflow of the second blowing air channel 322 is relatively less inclined, and the airflow in the sub-directions toward the center of the cylindrical portion 21 is relatively more, which can improve the heating effect of the furnace gas at the center of the cylindrical portion 21.

[0048] For further information, please refer to the attached manual. Figure 5A curved cover plate 3211 is fixedly connected to the position of the equalizer 4 corresponding to the first blowing flow channel 321. The curved cover plate 3211 is a thin-walled structure parallel to the inner wall of the inner liner 202. A narrow blowing gap 3212 is formed between the curved cover plate 3211 and the curved wall of the equalizer 4, so that a strong airflow that is more closely fitted to the inner wall of the cylindrical portion 21 can be blown out from the first blowing flow channel 321, thereby improving the effect of forming the high-temperature area and blowing the dust particles on the inner wall of the cylindrical portion 21 to accelerate their movement and falling. The first blowing flow channel 321 and the second blowing flow channel 322 can also be respectively connected to a group of jet pipes 31, each of which is independently controlled to adjust the respective airflow intensities.

[0049] In the above embodiment, if the yellow phosphorus furnace gas contains other impurities, resulting in strong dust adhesion, or a small amount of condensation is still produced due to equipment operation failure, it is easy to cause dust to adhere to the inner wall of the cylindrical part 21, and the air flow blown out through the blowing slit 3212 makes a circular motion on the inner wall of the inner liner 202 and is not easy to fall off. For this reason, refer to the attached manual Figure 5 A mesh plate 41 is provided at the flow equalizer 4 corresponding to the second blowing air channel 322, and the mesh plate 41 is adapted to the inner wall shape of the inner liner 202. The mesh plate 41 is located on the side of the second blowing air channel 322 away from the first blowing air channel 321, and the mesh plate 41 extends into the second blowing air channel 322. Then, when attachments are generated on the inner wall of the inner liner 202, the airflow blown out by the blowing slit 3212 can make the attachments move toward the rear group of flow equalizers 4, and gradually move to the mesh plate 41 at the rear group of flow equalizers 4. Under the action of the airflow blown out by the second blowing air channel 322, a part of the dust attachments attached to the mesh plate 41 can be blown outward, thereby dispersing the gathered dust, and under the direct high temperature of the second blowing air channel 322, the dust is dispersed and no longer condensed, and then continues to rotate backward to return to normal separation and collection.

[0050] In the actual production of yellow phosphorus, since there are some acidic gases (such as HF, HCl, etc.) in the yellow phosphorus furnace gas, if a small amount of condensation is produced in the furnace gas in the cyclone separator 2 due to an accident, the water vapor therein will form water and combine with the above-mentioned acidic gas to form a corrosive liquid. A corresponding anti-corrosion coating is usually provided on the inner wall of the equipment to prevent the equipment from being corroded. However, in this embodiment, after the airflow partition component 3 is used, the rotation speed of the furnace gas and dust in the cyclone separator 2 is increased. For the use scenario with larger and more dust particles, the particles slide relatively more on the inner wall of the cylinder 21, which is easy to cause wear, thereby causing damage to the coating and reducing the service life of the system. Therefore, this embodiment also improves the inner liner 202 of the cylinder 21. For details, refer to the attached manual. Figures 6 to 8The inner liner 202 in the cylindrical portion 21 is rotatably arranged in the outer casing 201 of the cylindrical portion 21, and a hollow cavity 204 is also arranged between the inner liner 202 in the cylindrical portion 21 and the insulation layer 203. The hollow cavity 204 is interconnected with the jet pipe 31, the second blowing flow channel 322 and the first blowing flow channel 321. A driving device 5 is arranged on the cylindrical portion 21, and the driving device 5 is used to drive the inner liner 202 to rotate along the rotation direction of the yellow phosphorus furnace gas in the cylindrical portion 21.

[0051] Furthermore, in actual use, the inner liner 202 can be driven to rotate relatively, so that the inner liner 202 has a certain rotation speed, thereby reducing the relative speed between the dust particles and the inner liner 202, reducing wear, and improving the protection effect on the equipment. At the same time, the existence of the hollow cavity 204 allows the jet pipe 31 to preferentially input high-pressure hot air into the hollow cavity 204, so as to preheat the inner liner 202 in advance. When the inner liner 202 rotates, the positions of the second blowing air channel 322 and the first blowing air channel 321 are also constantly changing. Therefore, the position of the output airflow of the inclined blowing air channel 32 can be continuously changed to make the airflow acceleration and heating effects more uniform and sufficient.

[0052] It should be noted that the driving device 5 can use a motor structure, and a gear structure is provided at the bottom of the inner liner 202. The above-mentioned motor structure is fixedly installed on the outside of the cylindrical portion 21. The output shaft of the motor structure is adapted to the gear structure of the inner liner 202 through a pinion, thereby realizing the rotational drive of the inner liner 202. This embodiment only takes the cylindrical portion 21 as an example for improvement. In actual use, the conical portion 22 can also be improved accordingly as needed.

[0053] Based on the above technical solution that the inner liner 202 can rotate, this embodiment further improves the screen 41. Figure 6 and Fig. 9 A flip movable frame 42 is provided at the position of the flow equalizer 4 corresponding to the mesh plate 41, the mesh plate 41 is fixedly installed on the flip movable frame 42, the flip movable frame 42 is rotatably installed in the flow equalizer 4, and a accommodating space for accommodating the slight swing of the flip movable frame 42 is provided at the position of the flow equalizer 4 corresponding to the flip movable frame 42, and in conjunction with the rotation of the inner liner 202, in actual use, due to airflow reasons and by controlling the rotation speed of the inner liner 202, the mesh plate 41 can swing with the flip movable frame 42, especially when the condensed dust particles reach the mesh plate 41, they will swing due to many factors such as centrifugal force and the airflow blown out by the second blowing air channel 322, which is beneficial to throw out the condensed dust particles and improve the treatment effect (if necessary, a control structure for swinging the flip movable frame 42 can also be set).

[0054] For large yellow phosphorus production plants, the yellow phosphorus production volume is large, and the volume of the equipment required is relatively large. When the cylindrical portion 21 is too large, the distance from the side wall to the center is large, and the heat conduction range of the high-pressure hot air blown out by the inclined blowing flow channel 32 is limited, which easily leads to poor furnace gas heating effect at the center of the cylindrical portion 21. For this reason, this embodiment provides the following technical solutions, specifically, refer to the attached specification Fig.10 and Fig.11 A conical platform 27 is fixedly installed at the middle of the bottom end of the conical portion 22, and a heating component 6 is arranged on the conical platform 27. The heating component 6 includes a rotating shaft 61, and the rotating shaft 61 is rotatably installed on the conical platform 27. A spiral leaf 62 is fixedly connected to the rotating shaft 61, and a heater 63 is fixedly installed in the spiral leaf 62. The heater 63 is preferably an electric heating structure, for example, an electric heating wire structure embedded in the spiral leaf 62, and a wire structure for supplying power to the heater 63 is arranged in the conical platform 27. The wire structure is connected to the external power supply of the cyclone separator 2. At the same time, an electric slip ring structure is arranged between the conical platform 27 and the rotating shaft 61 to supply power to the rotating heater 63, so that in actual use When the outer swirling airflow in the cyclone separator 2 reaches the bottom of the conical portion 22, an upward inner swirling airflow is formed. The inner swirling airflow can pass through the spiral blades 62 upward and be evenly heated by the spiral blades 62. When the inner swirling airflow rises, it can drive the spiral blades 62 to rotate, so it will not affect the rotation of the rising airflow. The heating component 6 is arranged at the bottom of the conical portion 22 and will not affect the airflow in the cylindrical portion 21 and the conical portion 22. While ensuring the normal operation of the equipment, the rising inner swirling airflow can be evenly and effectively heated, thereby ensuring the system's heating effect on the yellow phosphorus furnace gas, increasing the overall temperature of the yellow phosphorus furnace gas, and avoiding excessive temperature loss during the subsequent transportation process to form condensation blockage.

[0055] Refer to the instruction manual Fig.12 The present invention also provides a yellow phosphorus furnace gas efficient dust removal and heating method, comprising the following steps:

[0056] Step 1: Turn on the gas heater to heat the gas source, and use the high-pressure pump to transport the heated gas source to the injection pipe 31 to form a high-pressure hot gas flow;

[0057] Step 2: close the discharge control valve 26 and the delivery control valve on the furnace gas delivery pipe 1, so that the high-pressure hot air flow output by the injection pipe 31 gradually fills the cyclone separator 2, preheats the inner wall and inner cavity of the cyclone separator 2, and discharges the residual gas in the cyclone separator 2;

[0058] Step 3: When the temperature in the cyclone separator 2 is preheated to above the dew point temperature of the yellow phosphorus furnace gas, the delivery control valve on the furnace gas delivery pipe 1 is opened, and the yellow phosphorus furnace gas formed by the electric furnace is delivered to the cyclone separator 2 through the corresponding pump structure, and an external rotation and an internal rotation airflow are formed. The external rotation airflow filters the dust particles in the furnace gas through centrifugal force, so that the dust particles fall into the ash collecting hopper 25 for temporary storage, and the internal rotation airflow rises, so that the filtered yellow phosphorus furnace gas is discharged through the gas outlet 24, and a subsequent treatment process is performed;

[0059] Step 4: Increase the pumping pressure of the high-pressure pump, increase the flow rate of the output airflow of the inclined blowing air channel 32, accelerate the rotation speed of the yellow phosphorus furnace gas in the cyclone separator 2, and improve the separation efficiency;

[0060] Step 5, close the delivery control valve on the furnace gas delivery pipe 1, continuously input high-pressure hot air flow into the cyclone separator 2 through the injection pipe 31, and after all the yellow phosphorus furnace gas in the cyclone separator 2 is discharged, close the delivery control valve of the air outlet 24, and then open the discharge control valve 26 to discharge and collect the filtered dust.

[0061] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A yellow phosphorus furnace gas high efficiency dust removal and heating system, characterized in that: The invention comprises a furnace gas conveying pipe (1), a cyclone separator (2) and a plurality of groups of airflow blocking components (3), wherein the cyclone separator (2) comprises a cylindrical portion (21), a conical portion (22) is arranged at the bottom of the cylindrical portion (21), an air inlet (23) is arranged at the top edge of the cylindrical portion (21), an air outlet (24) is arranged in the middle of the cylindrical portion (21), and the air outlet (24) extends upwards out of the cylindrical portion (21), and the furnace gas conveying pipe (1) is connected to the air inlet (23); A plurality of groups of the airflow blocking components (3) are evenly distributed on the air outlet (24) and the side wall of the cylindrical portion (21), the airflow blocking components (3) comprising an air jet pipe (31), the air inlet (23) and the side wall of the cylindrical portion (21) are both provided with an inclined air blowing channel (32), the inclined air blowing channel (32) is in communication with the air jet pipe (31), the air jet pipe (31) is connected to a high-pressure hot air source, and the high-pressure hot air source is used to provide a high-pressure hot air flow to the air jet pipe (31); The inclined blowing flow channel (32) on the air inlet (23) and the cylindrical portion (21) is arranged to be inclined relative to the normal of the air inlet (23) and the side wall of the cylindrical portion (21), respectively, wherein the inclined blowing flow channel (32) is inclined toward the furnace gas flow direction at the air inlet (23) or the inner wall of the cylindrical portion (21).

2. A yellow phosphorus furnace gas high efficiency dust removal and heating system according to claim 1, characterized in that: The high-pressure hot gas source comprises a high-pressure pump, a gas heater and a gas source. The gas source is a gas tank storing inert gas. The gas tank is connected to the high-pressure pump and the jet pipe (31) through a gas pipeline. The gas heater is used to heat the gas source gas.

3. A yellow phosphorus furnace gas high efficiency dust removal and heating system according to claim 2, characterized in that: The cyclone separator (2) comprises an outer casing (201) and an inner liner (202), wherein the inner liner (202) is arranged inside the outer casing (201), and a heat-insulating layer (203) is arranged between the outer casing (201) and the inner liner (202).

4. A yellow phosphorus furnace gas high efficiency dust removal and heating system according to claim 3, characterized in that: A flow equalizer (4) is installed at a position corresponding to the jet pipe (31) in the cylindrical portion (21), and the flow equalizer (4) is fixedly installed on the inner liner (202), and one side of the flow equalizer (4) corresponding to the inner wall of the inner liner (202) is an arc-shaped wall, and the arc-shaped wall is integrated with the inner wall of the inner liner (202), and the flow equalizer (4) is distributed along the height direction of the cylindrical portion (21), and the inclined blowing flow channel (32) includes a first blowing flow channel (321) and a second blowing flow channel (322), and the first blowing flow channel (321) ) and a second blowing flow channel (322) are both arranged in the flow equalizer (4); the second blowing flow channel (322) and the first blowing flow channel (321) are arranged in sequence along the inner wall of the cylindrical portion (21) in the direction of the yellow phosphorus furnace gas; the second blowing flow channel (322) and the first blowing flow channel (321) are both connected to the gas injection pipe (31); the angle between the output airflow direction of the first blowing flow channel (321) and the normal line of the side wall of the cylindrical portion (21) is greater than the angle between the output airflow direction of the second blowing flow channel (322) and the normal line of the side wall of the cylindrical portion (21).

5. A yellow phosphorus furnace gas high efficiency dust removal and heating system according to claim 4, characterized in that: An arc-shaped cover plate (3211) is also fixedly connected to the position of the flow equalizer (4) corresponding to the first blowing flow channel (321); the arc-shaped cover plate (3211) is a thin-walled structure parallel to the inner wall of the inner liner (202); and a blowing gap (3212) is formed between the arc-shaped cover plate (3211) and the arc-shaped wall of the flow equalizer (4).

6. A yellow phosphorus furnace gas high efficiency dust removal and heating system according to claim 5, characterized in that: The flow equalizer (4) is provided with a mesh plate (41) corresponding to the second blowing air channel (322), and the mesh plate (41) is adapted to the inner wall shape of the inner liner (202). The mesh plate (41) is located on the side of the second blowing air channel (322) away from the first blowing air channel (321), and the mesh plate (41) extends into the second blowing air channel (322).

7. A yellow phosphorus furnace gas high efficiency dust removal and heating system according to claim 6, characterized in that: The inner lining (202) in the cylindrical portion (21) is rotatably arranged in the outer protective tube (201) of the cylindrical portion (21), and a hollow cavity (204) is also arranged between the inner lining (202) in the cylindrical portion (21) and the thermal insulation layer (203), and the hollow cavity (204) is interconnected with the jet pipe (31), the second blowing flow channel (322) and the first blowing flow channel (321), and a driving device (5) is arranged on the cylindrical portion (21), and the driving device (5) is used to drive the inner lining (202) to rotate along the rotation direction of the yellow phosphorus furnace gas in the cylindrical portion (21).

8. A yellow phosphorus furnace gas high efficiency dust removal and heating system according to claim 7, characterized in that: A flip movable frame (42) is arranged at a position on the current equalizer (4) corresponding to the mesh plate (41); the mesh plate (41) is fixedly mounted on the flip movable frame (42); the flip movable frame (42) is rotatably mounted in the current equalizer (4); and a receiving space for accommodating the swinging of the flip movable frame (42) is arranged at a position on the current equalizer (4) corresponding to the flip movable frame (42).

9. A yellow phosphorus furnace gas high efficiency dust removal and heating system according to claim 8, characterized in that: A conical platform (27) is fixedly mounted at the middle of the bottom end of the conical portion (22), a heating component (6) is arranged on the conical platform (27), the heating component (6) comprises a rotating shaft (61), the rotating shaft (61) is rotatably mounted on the conical platform (27), a spiral blade (62) is fixedly connected to the rotating shaft (61), and a heater (63) is fixedly connected in the spiral blade (62).

10. A dust removal and heating method for a yellow phosphorus furnace gas high-efficiency dust removal and heating system as claimed in claim 2, characterized in that: The following steps are involved: Step 1: Turn on the gas heater to heat the gas source, and use the high-pressure pump to transport the heated gas source to the injection pipe (31); Step 2: close the discharge control valve (26) and the delivery control valve on the furnace gas delivery pipe (1), so that the high-pressure hot air flow output by the injection pipe (31) gradually fills the cyclone separator (2), and preheats the inner wall and inner cavity of the cyclone separator (2); Step 3: After the temperature in the cyclone separator (2) is preheated to a temperature above the dew point temperature of the yellow phosphorus furnace gas, the delivery control valve on the furnace gas delivery pipe (1) is opened to deliver the yellow phosphorus furnace gas formed by the electric furnace to the cyclone separator (2) for dust separation; Step 4: increasing the pumping pressure of the high-pressure pump, increasing the flow rate of the output airflow of the inclined blowing air channel (32), and accelerating the rotation speed of the yellow phosphorus furnace gas in the cyclone separator (2); Step 5: close the delivery control valve on the furnace gas delivery pipe (1), continuously input high-pressure hot air flow into the cyclone separator (2) through the jet pipe (31), and after all the yellow phosphorus furnace gas in the cyclone separator (2) is discharged, close the delivery control valve of the gas outlet (24), and then open the discharge control valve (26) to discharge and collect the filtered dust.

Images