A fluidized bed furnace system suitable for chlorination of high calcium magnesium titanium slag

Abstract

The invention discloses a fluidized bed furnace device system suitable for chlorination of high-calcium-magnesium-titanium slag, comprising a fluidized bed furnace body, wherein the upper part of the fluidized bed furnace body is a reaction chamber, the middle part is an expansion chamber, and the lower part is a boiling chamber; a high-voltage pulse-assisted upper slag discharge system is arranged between the boiling chamber and the expansion chamber, and cooperates with an automatic slag discharger connected with a lower slag discharge port to realize effective and clean separation of impurity components such as calcium and magnesium in the fluidized bed, effectively prolong the stability time of the fluidized bed, and ensure sufficient reaction time between the material and chlorine; in addition, a gas distribution chamber is arranged at the lower part of the boiling chamber, and a wind cap sleeve with rectifying small holes is arranged in the gas distribution chamber, and the wind cap sleeve connects the gas distribution chamber and the boiling chamber; a double-flow channel spiral blade is arranged in the wind cap sleeve to realize high-intensity rotary cutting and stirring of the material bed, so that the material and chlorine are fully mixed and reacted; further, a plasma gun ignition device is also arranged in the fluidized bed furnace system to fully realize efficient and fully automatic clean production of titanium tetrachloride gas.

Description

Technical Field

[0001] The invention relates to a fluidized bed chlorination furnace chemical production device system, in particular to a fluidized bed chlorination furnace device system suitable for high calcium magnesium titanium slag chlorination. Background Art

[0002] At present, titanium slag, rutile, artificial rutile and other titanium-rich materials (main components: TiO 2 ) is produced by high temperature chlorination reaction to produce titanium tetrachloride (TiCl 4 ) is the main process route for titanium tetrachloride production. However, industry technical research and production practice have shown that large-scale boiling chlorination process has high requirements for the impurity content of CaO, MgO and other impurities in titanium-rich raw materials. Titanium-rich materials (high calcium magnesium titanium raw materials) with CaO+MgO content exceeding 1.5% are difficult to use in sieve plate boiling chlorination furnaces. my country's Panxi region is rich in vanadium-titanium magnetite resources, and its associated titanium resources account for about 90% of the total titanium resources in the country and 35% of the world. At present, the electric furnace method is used to smelt this titanium concentrate to produce TiO 2 75% to 78% acid-soluble titanium slag or combined with Yunnan Mine, Miyi and other foreign titanium ores to produce TiO 2 85% of titanium slag is supplied to domestic sulfuric acid process and chloride process titanium dioxide plants (molten salt chlorination or sieve-free boiling chlorination batching) as production raw materials. The main chemical composition of its representative titanium slag products is:

[0003] Panxi Mine Smelting 75 High Titanium Slag

[0004]

[0005] Smelting 85 high titanium slag by mixing Panxi ore with sand ore

[0006]

[0007] From the above data, it can be seen that the impurity content of Panxi titanium resources in my country is high, especially the content of calcium and magnesium impurities. Therefore, the key technology for the development and utilization of Panxi titanium resources in my country is, on the one hand, to use new technology to separate impurities such as Ca and Mg that are difficult to separate from titanium slag (or ilmenite) to improve the industrial technology of producing titanium slag quality; on the other hand, to develop advanced industrial processing technology that adapts to the high impurity characteristics of titanium slag. These two key technologies are currently the bottlenecks in the development of my country's titanium industry.

[0008] So far, no matter whether there is a large-scale boiling chlorination technology of sieve plate in the world or in China, there is no technology based on Panxi titanium slag (main component TiO 2 =75-85%, CaO>1.5%, MgO>5%, the present invention abbreviates "high calcium magnesium titanium slag" as raw material and is a successful precedent for the normal production of titanium tetrachloride.

[0009] Therefore, how to achieve the widespread use of high-calcium-magnesium-titanium slag in large-scale boiling chlorination furnaces, and provide a large-scale boiling chlorination furnace system that can be used for the boiling chlorination of high-calcium-magnesium-titanium slag, has become an issue that urgently needs to be paid attention to and resolved in the independent development and use of Panzhihua titanium ore resources in my country. Summary of the invention

[0010] The purpose of the present invention is to overcome the above-mentioned shortcomings in the prior art. The inventor provides a boiling furnace device system suitable for the chlorination of high-calcium-magnesium-titanium slag, and cooperates with a modification process described in the invention application "A high-calcium-magnesium-titanium slag modification process" submitted by the inventor on the same day, which can make the high-calcium-magnesium-titanium slag suitable for large-scale boiling chlorination process, so that the high-calcium-magnesium-titanium slag can be stably reacted in the boiling furnace device system described in the present invention to obtain titanium tetrachloride gas product, and realize effective and clean separation of impurity components such as calcium and magnesium in the boiling bed, improve the utilization rate of raw materials, and fully realize the high automation, intelligence and cleanliness of titanium tetrachloride gas production.

[0011] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0012] A fluidized bed furnace device system suitable for chlorination of high calcium magnesium titanium slag, comprising a fluidized bed furnace body, wherein the upper part of the fluidized bed furnace body is a reaction chamber, the middle part is an expansion chamber, and the lower part is a boiling chamber; a gas outlet is arranged at the top of the reaction chamber; a feed port, an ignition port and a lower slag discharge port are arranged at the bottom side of the boiling chamber; the characteristics are:

[0013] A high-pressure pulse-assisted upper slag discharge system is provided between the boiling chamber and the reaction chamber;

[0014] The high-pressure pulse assisted upper slag discharge system comprises a high-pressure pulse generator and a pulse airflow injection pipe, which is used to emit high-speed airflow to guide the fine powder impurities above the boiling bed to be discharged from the top gas outlet along with the main airflow.

[0015] In order to meet the chlorination reaction requirements of titanium raw materials with different physical and chemical properties, the gas flow rate in the fluidized bed furnace has a large flexibility. When the fluidized bed furnace is operated at a low gas velocity, it cannot meet the carrier gas upper slag discharge conditions, and it is difficult to effectively discharge fine impurity particles from the upper slag discharge port. When the impurities in the fluidized bed are enriched to a certain amount, they can only be discharged directly from the lower slag discharge port together with the entire material bed, resulting in low raw material utilization in the material bed and low titanium tetrachloride production efficiency.

[0016] Especially in the boiling chlorination process of high calcium and magnesium titanium slag with small average particle size, the high content of calcium and magnesium impurities in the titanium slag are converted into solid phase CaF 2 , CaAlF 5 MgF 2Fine powder particles may be enriched above the fluidized bed as the reaction proceeds. In order to maintain the stability of the fluidized bed in the fluidized bed furnace, more frequent slag discharge is required, which not only increases the complexity of the entire process operation but also causes low utilization of the reaction raw materials, which is not conducive to the large-scale boiling chlorination of high-calcium-magnesium-titanium slag.

[0017] To this end, the present invention provides a new type of boiling furnace device system suitable for the chlorination of high-calcium-magnesium-titanium slag. A high-pressure pulse assisted upper slag discharge system is set between the boiling chamber and the expansion chamber. When the fine powder impurities enriched above the boiling bed of high-calcium-magnesium-titanium slag cause the boiling bed resistance to rise to a set value, the interlocked high-pressure pulse upper slag discharge system will work and eject a high-pressure pulse airflow. Through the drainage effect of the ejected airflow, the calcium and magnesium fine powder impurities suspended above the boiling bed are sucked in and assisted to be discharged from the top gas outlet along with the furnace gas. During the entire boiling chlorination process, the high-pressure pulse assisted upper slag discharge system is operated to allow fine powder impurities to be intermittently discharged from the furnace, and the pressure of the boiling bed is controlled and stabilized until the high-pressure pulse upper slag discharge system cannot effectively control the resistance of the boiling bed and the resistance of the boiling bed rises to a certain value. Only then are the impurities discharged from the lower slag discharge port together with the entire material bed, thereby effectively extending the stabilization time of the material boiling bed, allowing the materials to be fully mixed and reacted in a boiling state, improving the titanium slag conversion rate and titanium tetrachloride yield, reducing the number of lower slag discharges, simplifying the production process, and effectively improving the production efficiency of titanium tetrachloride.

[0018] Preferably, the high-pressure pulse upper slag discharge system is arranged on the bottom side wall of the expansion chamber or the top side wall of the boiling chamber. The normal fluidized bed height does not exceed the top of the boiling chamber, but after the fine material is enriched, a considerable concentration of fine particles will be suspended in the space above the top. The high-pressure pulse upper slag discharge system is preferably arranged at the above position, which is more suitable for the airflow discharge conditions.

[0019] Preferably, the high-pressure pulse upper slag discharge system is arranged along the circumference of the fluidized bed furnace, and the arrangement spacing of adjacent pulse airflow injection tubes is controlled within the range of 1000-3000mm; the angle between the center line of each pulse airflow injection tube and the vertical axis of the furnace body is 5-45°. In the actual production process, the arrangement spacing of the pulse airflow injection tubes is selected according to the diameter of the specific fluidized bed furnace, wherein the large-diameter fluidized bed furnace selects the large-spacing arrangement; and the angle between the center line of each pulse airflow injection tube and the vertical axis of the furnace body is specifically adjusted and controlled within the range of 5-45°, so as to ensure that the high-pressure pulse airflow can suck and discharge the fine powder impurities suspended above it without destroying the boiling steady state of the fluidized bed as much as possible.

[0020] Preferably, the lower slag discharge port is connected to an automatic slag discharger, which mainly includes a pressure difference sensor, an electric downward discharge valve, a buffer collector and an electric slag discharge valve, and is used for automatic lower slag discharge of the boiling furnace; when the slag discharge capacity of the high-pressure pulse assisted upper slag discharge system cannot effectively control the boiling bed resistance, and the boiling bed resistance rises to the pressure trigger point set by the automatic slag discharger, the slag discharger automatically starts to work and discharges the slag out of the furnace body.

[0021] Combined with the above-mentioned high-pressure pulse upper slag discharge system, the boiling furnace device described in the present invention can fully realize the automation and intelligence of slag discharge, and through the coordinated operation of the high-pressure pulse upper slag discharge system and the automatic lower slag discharger, it can effectively monitor the enrichment status of impurities in the boiling bed, and extend the stabilization time of the material boiling bed, so that the material can be fully mixed and reacted in the boiling state, thereby improving the titanium slag conversion rate and titanium tetrachloride yield, simplifying the production process, and effectively improving the production efficiency of titanium tetrachloride.

[0022] Preferably, the bottom of the boiling furnace is also connected to a gas distribution chamber;

[0023] The gas distribution chamber is a cavity composed of a corrosion-resistant upper tube plate, a lower tube plate and an outer shell; a chlorine gas inlet hole is arranged on the outer shell of the gas distribution chamber, and the static pressure gas distribution principle is adopted to rectify and distribute the introduced gas; wherein,

[0024] The upper tube plate of the air distribution chamber is welded to the bottom of the boiling chamber; the lower tube plate is arranged at the bottom of the air distribution chamber; a plurality of wind hood sleeves are fixedly connected between the upper tube plate and the lower tube plate; a rectifying hole is opened on the sleeve wall of each wind hood sleeve, and the gas in the air distribution chamber enters the wind hood sleeve through the rectifying hole and is further rectified by the rectifying hole to make the flow field of the air chamber more uniform, thereby optimizing the wind distribution conditions of the wind hood.

[0025] Each of the hood sleeves is equipped with a double-helix guide hood structure, so that the airflow entering the hood sleeve rotates at high speed along the double-helix flow channel and is sprayed to the bottom of the boiling furnace, forming a rotary shear airflow, which drives the material flow field of the raw material bed at the bottom of the boiling furnace.

[0026] According to the above-mentioned optimized technical scheme, by adding an air distribution chamber at the bottom of the boiling furnace, the chlorine gas introduced into the furnace is first introduced into the furnace from the side wall of the air distribution chamber, subjected to static pressure air distribution, and rectified through the rectifying holes, so as to further optimize the air distribution conditions of the hood, so that the chlorine gas in the hood sleeve rotates at high speed along the double helix flow channel under the static pressure of the air distribution chamber and is evenly sprayed to the bottom of the boiling furnace, thereby driving the material flow field of the raw material bed at the bottom of the boiling furnace, forming a high-intensity rotary shear airflow and material flow field, accelerating the chlorination reaction, and preventing powder from agglomerating; and the use of a double helix guide hood makes the air flow rate of the air flow rising along the hood more uniform, and at the same time, it can effectively prevent the material at the bottom of the boiling chamber from leaking into the air distribution chamber.

[0027] Optimally, the double-spiral guide hood structural component adopts a quick-install combination structure, including a hood head and a double-channel spiral guide rod; a socket interface is provided at the bottom of the hood head for socket combination with the hood sleeve; the double-channel spiral guide rod is mainly composed of a connecting rod and a double-channel spiral sheet arranged on the top of the connecting rod; the double-channel spiral guide rod is arranged in the hood sleeve, and the double-channel spiral sheet on the top cooperates with the hood head.

[0028] This socket-and-spigot quick-install combination structure is convenient for the separate replacement of the double-helix guide rod after it is burned out, and at the same time saves expensive hood head materials.

[0029] Preferably, the bottom of each of the double-channel spiral guide rods is connected to a hood flow field management system, including an airflow acoustic wave sensor and a signal receiving and analyzing instrument, which are used to monitor the operating status of each hood of the boiling furnace.

[0030] Unlike the state of a traditional fluidized bed furnace in operation, which can only be analyzed and inferred by the human brain through fluidized bed temperature monitoring, bed resistance monitoring data, etc., the bottom of each double-channel spiral guide rod of the large-scale fluidized bed chlorination furnace of the present invention is connected with an airflow acoustic wave sensor, which converts the acoustic wave characteristics of the operating state into electromagnetic signals, and transmits them wirelessly to the receiving and analyzing system. Through computer calculation and analysis, the operating status of each hood is displayed, the abnormal state is judged, fault warning is implemented, and the operator is guided to make operational adjustments. The instrument analysis and control system is used to replace the original traditional manual observation and judgment method, so as to realize the automation, intelligence and precision of the monitoring of the operating status of the fluidized bed furnace. Among them, the airflow acoustic wave sensor and the signal receiving and analyzing instrument in the hood flow field management system of the present invention can directly select commercially available mature products, and then debug and use them in combination, and the equipment is simple and easy to obtain.

[0031] Preferably, the ignition port is connected to a plasma gun ignition device for igniting the boiling furnace.

[0032] Traditional boiling furnace ignition usually uses carbon blocks (coke, charcoal, etc.) as fuel, and the manual ignition method and oil and gas ignition method are used to open the furnace and heat up, which not only wastes fuel, is time-consuming and labor-intensive, but also cannot control the degree of fuel combustion, which easily leads to local overheating of raw materials and sintering of raw materials. The present invention uses high-energy plasma generated by a plasma ignition gun as the ignition and heating starting energy, and compressed air as a combustion aid, and directly performs segmented gradual heating and ignition on the boiling chlorination reaction raw material bed; it has automatic ignition control, fast heating, significant energy saving, and eradicates the corrosion and blockage problems caused by water vapor in carbon block fuel. The technology is mature, reliable and clean.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. In the boiling furnace device system suitable for high calcium and magnesium chlorination described in the present invention, the high-pressure pulse assisted upper slag discharge system is combined with the coordinated operation of the automatic lower slag discharger to fully realize the full automation and intelligence of the boiling furnace slag discharge treatment. Through the operation of the high-pressure pulse upper slag discharge system, the stabilization time of the material boiling bed is effectively extended, so that the material can be fully mixed and reacted in the boiling state, the titanium slag conversion rate and the titanium tetrachloride yield are improved, the number of lower slag discharges is reduced, the production process is simplified, and the titanium tetrachloride production efficiency is effectively improved.

[0035] 2. According to the boiling furnace device system suitable for chlorination of high-calcium-magnesium-titanium slag described in the present invention, an air distribution chamber is added to allow chlorine to enter from the side wall of the air distribution chamber, and is pre-distributed evenly by static pressure. After entering the wind cap sleeve through the rectifying hole, under the static pressure of the air distribution chamber, the double helix flow channel of the double helix guide structure in the wind cap sleeve rotates at high speed and is evenly sprayed to the bottom of the boiling furnace, driving the material flow field of the raw material bed at the bottom of the boiling furnace, forming a high-intensity rotary shear airflow and material flow field, accelerating the chlorination reaction, preventing powder agglomeration, and effectively avoiding the material at the bottom of the boiling chamber from leaking into the air distribution chamber to cause raw material waste and wind cap blockage problems, thereby further improving the titanium slag conversion rate and titanium tetrachloride yield.

[0036] 3. The boiling furnace device system suitable for chlorination of high-calcium-magnesium-titanium slag described in the present invention is different from the traditional method of manually observing and judging the running status of materials in the boiling furnace. The present invention connects an airflow acoustic wave sensor to the bottom of each of the double-channel spiral guide rods to convert the acoustic wave characteristics under the running state into electromagnetic signals, which are wirelessly transmitted to the receiving and analyzing system. Through computer calculation and analysis, the running status of each hood is displayed, abnormal status is judged, fault warning is implemented, and the operator is guided to make operational adjustments, thereby realizing automatic, intelligent and precise monitoring of the running status of the boiling furnace.

[0037] 4. According to the boiling furnace device system suitable for chlorination of high calcium magnesium titanium slag described in the present invention, by utilizing a plasma gun ignition device to replace the traditional manual carbonization ignition operation, it is possible to realize automatic ignition temperature control, fast heating, significant energy saving, and eradicate the corrosion and blockage problems caused by water vapor in the carbon block fuel. The technology is mature, reliable, and clean.

[0038] 5. In general, in combination with the above-mentioned device system, the present invention provides a boiling furnace device system suitable for the chlorination of high-calcium-magnesium-titanium slag, so that the high-calcium-magnesium-titanium slag can be stably reacted in the boiling furnace device system described in the present invention to obtain titanium tetrachloride gas product, and realize effective and clean separation of impurity components such as calcium and magnesium in the boiling bed, improve the utilization rate of raw materials, and fully realize the highly automated, intelligent and clean production of titanium tetrachloride gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a schematic diagram of a boiling furnace system suitable for chlorination of high calcium magnesium titanium slag described in an embodiment of the present invention.

[0040] Figure 2 for Figure 1 Schematic diagram of the structure of the medium and high pressure pulse assisted slag discharge system.

[0041] Figure 3 for Figure 1 Schematic diagram of the structure of the middle cloth air chamber.

[0042] Figure 4 for Figure 3 Schematic diagram of the structure of the double helix guide hood structure.

[0043] Figure 5 for Figure 4 Schematic diagram of the structure of the double-channel spiral guide.

[0044] Figure 6 for Figure 1 Schematic diagram of the structure of the automatic slag discharger.

[0045] Markings in the figure: 1-boiling furnace body; 101-reaction chamber; 102-expansion chamber; 103-boiling chamber; 1011-gas outlet; 1021-feeding port; 1022-ignition port; 1023-lower slag discharge port; 2-high-pressure pulse assisted upper slag discharge system; 201-high-pressure pulse generator; 202-pulse airflow injection pipe; 203-clearing airflow interface; 3-gas distribution chamber; 301-upper tube plate; 302-heat-resistant metal shell; 303-chlorine gas inlet; 304-lower tube plate; 305-hood casing; 306-rectifier hole; 307-double spiral guide hood structure Components; b- hood head; c- double-channel spiral guide rod; b1- hood head quick-install socket; c1- double-channel spiral guide plate; c2- connecting rod; 308- hood threaded plug; 4- hood flow field management system; 401- acoustic sensor; 402- signal receiving and processing system; 5- automatic lower slag discharger; 501- differential pressure sensor; 502- downward-expanding electric slag discharger; 503- buffer tank; 504- electric slag discharge valve; 10- chlorine gas top inlet; 12- pressure gauge port; 13- thermometer port; 14- manhole; 15- maintenance port; 16- air distribution chamber safety valve interface. DETAILED DESCRIPTION

[0046] The present invention is further described in detail below in conjunction with the accompanying drawings and the best embodiments of the present invention. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0047] like Figure 1As shown, the invention provides a large-scale fluidized bed furnace system applicable to the chlorination of high-calcium-magnesium-titanium slag, and the use of the fluidized bed furnace system can realize large-scale, intelligent and clean titanium tetrachloride production. In addition, the present invention is also particularly in line with the invention application of "a high-calcium-magnesium-titanium slag modification process" submitted by the inventor on the same day. After adding a modifier in the chlorination reaction process of high-calcium-magnesium-titanium slag, how to achieve effective and clean separation of impurity components such as calcium and magnesium in the fluidized bed, a special design has been made, which is also applicable to other types of high-titanium slag, rutile and other boiling chlorination.

[0048] like Figure 1-6 As shown, a boiling device system of the present invention comprises a boiling furnace body 1, wherein the boiling furnace body 1 comprises a reaction chamber 101, an expansion chamber 102 and a boiling chamber 103 from top to bottom. The reaction chamber 101 is a cylindrical steel-lined refractory structure capped with a spherical cap; the boiling chamber 103 is a cylindrical steel-lined refractory structure; the expansion chamber 102 is an inverted truncated cone steel-lined refractory structure connected to the boiling chamber 103 at the bottom and the reaction chamber 101 at the top. A gas outlet 1011 is provided at the top of the reaction chamber 101; a feed port 1021, an ignition port 1022 and a lower slag discharge port 1023 are provided on the bottom side of the boiling chamber 103.

[0049] A high-pressure pulse-assisted upper slag discharge system 2 is provided between the boiling chamber 103 and the expansion chamber 102. Figure 2 As shown, the high-pressure pulse assisted upper slag discharge system 2 includes a high-pressure pulse generator 201 and a pulse airflow injection tube 202, which are used to increase the drainage of the airflow and assist the fine powder impurities above the material boiling bed to be discharged from the top gas outlet 1011 along with the airflow.

[0050] The lower slag discharge port 1023 is connected to an automatic slag discharger 5. Figure 6 As shown, the automatic slag discharger 5 mainly includes a pressure difference sensor 501, an electric downward discharge valve 502, a buffer collector 503 and an electric slag discharge valve 504; it is used for automatic downward slag discharge of a boiling furnace. When the high-pressure pulse upper slag discharge system 2 cannot effectively control the resistance of the boiling bed, and the resistance of the boiling bed rises to the pressure trigger point set by the automatic slag discharger 5, the slag discharger automatically starts to work and discharges impurities such as fine powder together with the entire material bed.

[0051] By combining the coordinated operation of the high-voltage pulse assisted upper slag discharge system 2 and the automatic lower slag discharger 5, the full automation and intelligence of the slag discharge treatment of the boiling furnace is fully realized, and the stabilization time of the material boiling bed is effectively extended, so that the material can be fully mixed and reacted in the boiling state, the titanium slag conversion rate and the titanium tetrachloride yield are improved, the number of lower slag discharges is reduced, the production process is simplified, and the titanium tetrachloride production efficiency is effectively improved.

[0052] The bottom of the boiling chamber 103 is also connected to the air distribution chamber 3. Figure 3 As shown, the air distribution chamber 3 is a cavity composed of an upper tube plate 301, a lower tube plate 304 and a heat-resistant metal shell 302. A plurality of hood sleeves 305 are arranged between the upper tube plate 301 and the lower tube plate 304; each of the hood sleeves 305 passes through the upper tube plate 301 and the lower tube plate 304 and is fixed by welding. Among them, the upper tube plate 301 is arranged between the gas distribution chamber and the boiling chamber; the lower tube plate 304 is arranged at the bottom of the gas distribution chamber 3; the side wall of the gas distribution chamber 3 is provided with a chlorine gas inlet hole 303, and the static pressure gas distribution principle is adopted to distribute the introduced gas; the wall of the wind cap sleeve 305 is provided with a rectifying hole 306, and the gas in the gas distribution chamber 3 enters the wind cap sleeve 303 through the rectifying hole 307; the bottom end of each wind cap sleeve 305 passes through the lower tube plate 304, and is covered with a wind cap threaded plug 308 to prevent the gas entering the wind cap sleeve from overflowing from the lower end of the sleeve.

[0053] The hood sleeve 305 is equipped with a double-helix guide hood structure 307, so that the airflow entering the hood sleeve 305 rotates along the double-helix flow channel at high speed and sprays to the bottom of the boiling furnace, forming a rotary shear airflow, which drives the flow field of the raw material bed at the bottom of the boiling furnace. Figure 4-5 As shown, the double-spiral flow guide hood structure 307 is a quick-install combination structure, including a hood head b and a double-flow spiral flow guide c; the bottom of the hood head b is provided with a socket interface b1, and the hood head b is combined with the top of the hood sleeve 305 in a socket-and-socket combination; the double-flow spiral flow guide c is mainly composed of a screw c1 and a double-flow spiral piece c2 arranged at the top of the screw; the double-flow spiral flow guide c is arranged in the hood sleeve 305, and the double-flow spiral piece c2 at the top cooperates with the hood head b. This quick-install combination structure of the socket combination is convenient for the separate replacement of the double-spiral flow guide hood structure after it is burned, and at the same time saves the expensive hood sleeve material.

[0054] like Figure 4As shown, the bottom of each of the double-channel spiral guide rods c of the present invention is connected to a hood flow field management system 4 composed of an airflow acoustic wave sensor and a signal receiving and analyzing instrument 402; the airflow acoustic wave sensor 401 converts the acoustic wave characteristics of each hood in operation into an electromagnetic signal, wirelessly transmits it to the receiving and analyzing system, and displays the operation status of each hood through computer calculation and analysis, judges the abnormal state, implements fault warning, and guides the operator to make operational adjustments; thereby realizing the automation, intelligence and precision of the operation status monitoring of the boiling furnace. Among them, the airflow acoustic wave sensor 401 of the present invention selects mature products on the market, such as: digital acoustic wave sensor models produced in Nanjing: GEEXLB-2S, GEEBLA-CS (-3, -4, -5), etc.; the signal receiving and analyzing instrument 402 selects advanced and reliable complete sets of products in the market, such as products of industrial automation control engineering complete sets such as Honeywell, Zhejiang Zhongkong, etc.

[0055] The boiling furnace ignition port 1022 is also connected to a plasma gun ignition device, which is used to replace the traditional manual charcoal adding ignition operation, thereby realizing the automation and cleanness of the boiling furnace ignition and temperature rise control.

[0056] In combination with the above-mentioned device system, the present invention provides a fluidized bed furnace device system suitable for chlorination of high calcium magnesium titanium slag, which can meet the chlorination reaction requirements of finer high calcium magnesium titanium slag, ensure that the chlorine absorption rate reaches more than 99%, and the titanium chlorination rate reaches more than 93%. It also ensures the effective and clean separation of impurity components such as calcium and magnesium in the fluidized bed, and fully realizes the highly automated, intelligent and clean production of titanium tetrachloride gas.

[0057] In addition, it should be specifically stated that the above embodiments are only the best embodiments described in the present invention. Any technical solutions and improvements that modify or replace the present invention without departing from the spirit and scope of the invention should be included in the scope of the claims of the present invention.

Claims

1. A fluidized bed furnace device system suitable for chlorination of high calcium magnesium titanium slag, comprising a fluidized bed furnace body (1), wherein the upper portion of the fluidized bed furnace body (1) is a reaction chamber (101), the middle portion is an expansion chamber (102), and the lower portion is a boiling chamber (103); a gas outlet (1011) is provided at the top of the reaction chamber (101); a feed port (1021), an ignition port (1022) and a lower slag discharge port (1023) are provided on the side wall of the boiling chamber (102); the characteristics are: A high-pressure pulse-assisted upper slag discharge system (2) is provided between the boiling chamber (103) and the expansion chamber (102); the high-pressure pulse-assisted upper slag discharge system (2) comprises a high-pressure pulse generator (201) and a pulse airflow injection pipe (202), which are used to increase the drainage of the airflow and guide the fine powder impurities enriched above the boiling bed to be discharged from the top gas outlet (1011) along with the airflow.

2. A fluidized bed furnace system suitable for chlorination of high calcium magnesium titanium slag according to claim 1, characterized in that: The high-pressure pulse upper slag discharge system (2) is arranged on the bottom side of the expansion chamber (102) or the top side of the boiling chamber (103).

3. A fluidized bed furnace system suitable for chlorination of high calcium magnesium titanium slag according to claim 1, characterized in that: The pulse airflow injection pipe (202) is arranged along the circumference of the boiling furnace, and the angle between the nozzle of the pulse airflow injection pipe (202) and the vertical central axis of the furnace body is 5 to 45 degrees.

4. A fluidized bed furnace system suitable for chlorination of high calcium magnesium titanium slag according to claim 1, characterized in that: The lower slag discharge port (1023) is controlled by an automatic slag discharge system (5); the automatic slag discharge system (5) comprises a pressure difference sensor (501), an electric downward-spreading discharge valve (502), a buffer collector (503) and an electric slag discharge valve (504); and is used for automatic lower slag discharge of a fluidized bed furnace.

5. A fluidized bed furnace system suitable for chlorination of high calcium magnesium titanium slag according to any one of claims 1 to 4, characterized in that: The bottom of the boiling chamber (103) is also connected to a gas distribution chamber (3); The gas distribution chamber (3) mainly comprises an upper tube plate (301), a lower tube plate (304) and a plurality of hood sleeves (305); each of the hood sleeves (305) passes through the upper tube plate (301) and the lower tube plate (304) and is fixed by welding; wherein the upper tube plate (301) of the gas distribution chamber is welded to the bottom of the boiling chamber (103); the lower tube plate (302) is arranged at the bottom of the gas distribution chamber (3); and a chlorine gas inlet hole (303) is arranged on the side wall of the gas distribution chamber (3); A rectifying hole (306) is provided on the wall of the wind cap sleeve (305), and the gas in the air distribution chamber (3) enters the wind cap sleeve (305) through the rectifying hole (306); The bottom end of each of the hood sleeves (305) passes through the lower tube plate (304) and is matched with a closed structural member (308); The hood sleeve (305) is equipped with a double-helix flow guide hood structure (307), so that the airflow entering the hood sleeve (305) rotates at high speed along the double-helix flow channel and is sprayed to the bottom of the boiling furnace, forming a rotary shear airflow, which drives the material flow field of the raw material bed at the bottom of the boiling furnace.

6. A fluidized bed furnace system suitable for chlorination of high calcium magnesium titanium slag according to claim 5, characterized in that: The double-helix flow-guiding hood (307) comprises a hood head (b) and a double-channel spiral flow-guiding member (c); The bottom of the hood head (b) is provided with a socket joint (b1), and the hood head (b) is combined with the top of the hood sleeve (306) in a socket joint; the double-channel spiral guide member (c) is composed of a connecting rod (c1) and a double-channel spiral sheet (c2) arranged on the top of the connecting rod; The double-channel spiral guide member (c) is arranged in the hood sleeve (305), and the double-channel spiral sheet (c2) on the top thereof cooperates with the hood head (b).

7. A fluidized bed furnace system suitable for chlorination of high calcium magnesium titanium slag according to claim 6, characterized in that: The bottom of the double-flow channel spiral guide member (c) is connected to a hood flow field management system (4) for monitoring the operating status of the boiling furnace hood.

8. A fluidized bed furnace system suitable for chlorination of high calcium magnesium titanium slag according to claim 1, characterized in that: The ignition port (1022) is connected to a plasma gun ignition device (6) for igniting the boiling furnace.

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