Large reduction distillation device for producing titanium sponge with high energy efficiency of more than 18 tons

Abstract

The utility model relates to a large reduction distillation device for producing titanium sponge with more than 18 tons and high energy efficiency. And high-efficiency production is realized. A heat preservation layer is arranged outside the electric heating furnace, a reactor large cover provided with a feeding pipe and a central pipe used for being communicated with a passageway heating and heat preservation pipeline is composed of an upper large cover flange and a downward-extending large cover plug provided with a heat preservation layer, and an annular cooling water channel is arranged on the periphery of the upper large cover flange. A reciprocating unblocking mechanism for hermetically extending a reciprocating unblocking rod with an end unblocking head into the inner cavity of the vertical section of the downstream end is vertically arranged at the corner of the downstream end; the flow-through supporting sieve plate is a strong-supporting high-flow-through bottom confluence type supporting sieve plate. The device has the advantages of passage blockage prevention, passage flow passing capacity improvement, large cover deformation and air leakage prevention, high sieve plate supporting strength, deformation prevention, good flow passing uniform distribution and realization of high-energy-efficiency production of more than 18 tons.

Description

Technical Field

[0001] The utility model relates to a titanium sponge reduction and distillation device, in particular to a large-scale reduction and distillation device for high-energy-efficient production of titanium sponge with a capacity of more than 18 tons. Background Art

[0002] Titanium sponge is an important raw material in the titanium industry and is widely used in fields such as aviation, aerospace, chemical industry, petroleum, and medicine. With the development of technology, in the process of titanium sponge production, the requirements for the production capacity and efficiency of titanium sponge are getting higher and higher, especially the demand for energy-saving and high-efficient production of titanium sponge is increasing. The commonly used 10-ton furnace in the industry has a high energy consumption, and a jacking machine is required during the extraction of titanium ingots; the use of ordinary sieve plates has poor ventilation effect and is prone to deformation, resulting in a slow speed during the vacuum pumping process, a large proportion of bottom skin titanium in the produced titanium sponge ingots, a low rate of first-class products, and high energy consumption; the use of ordinary large covers has a high frequency of deformation and air leakage, and the vacuum degree is unstable; during the distillation process, the cold end is frequently blocked and cleared, resulting in an extended ineffective distillation production time, an extended production time per ton of titanium, an increased production cost, and at the same time, a high risk of product air intake due to opening and clearing the blockage; the cold end assembly of the ordinary aisle electric heater is difficult and prone to deformation; the ordinary furnace shell does not adopt energy-saving and heat-insulating measures, resulting in a high production cost, low quality, and low production efficiency. These problems are more prominent in the production capacity of more than 18 tons. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the above-mentioned defects of the prior art and provide a large-scale reduction and distillation device for high-energy-efficient production of titanium sponge with a capacity of more than 18 tons. The device has the advantages of preventing blockage in the aisle, improving the flow capacity of the aisle, preventing deformation and air leakage of the large cover, high supporting strength of the sieve plate to prevent deformation, good through-flow uniformity, reducing and avoiding the formation of bottom skin titanium in the titanium sponge ingot, and realizing high-energy-efficient production of more than 18 tons.

[0004] To achieve the above purpose, the utility model is a large-scale reduction distillation device for producing sponge titanium with a capacity of more than 18 tons and high energy efficiency. Two parallel reactors, each with an outer outer cover of an electric heating furnace and an inner bottom with a permeable support sieve plate and its heat dissipation tube, are connected through a reactor cover and an aisle heating pipeline. The special feature is that the electric heating furnace is provided with an external insulation layer, and the reactor cover provided with a feeding pipe and a central pipe for connecting the aisle heating and insulation pipeline is composed of an upper cover flange and a lower extended cover plug provided with an insulation layer. An annular cooling water channel is provided on the upper outer periphery of the upper cover flange to prevent the cover from deforming and leaking. The aisle heating and insulation pipeline is a aisle heater provided in the middle horizontal section of the aisle insulation pipeline, and the two ends of the middle horizontal section are bent and extended to the end vertical section. A reciprocating clearing and blocking mechanism is vertically arranged at the downstream end bend to extend the reciprocating clearing and blocking rod with an end clearing head into the inner cavity of the downstream end vertical section in a sealed manner. The permeable support sieve plate is a strong support high permeable bottom converging support sieve plate. The external insulation layer of the electric heating furnace can improve the energy efficiency of the electric heating furnace. Compared with the existing aisle heating pipeline, the aisle heating and insulation pipeline improves energy efficiency while also helping to ensure and improve the flow capacity of the aisle, thereby improving production efficiency. The aisle heating and insulation pipeline is an aisle heater installed in the middle horizontal section of the aisle insulation pipeline. The two ends of the middle horizontal section are bent and extended to the vertical section. A reciprocating clearing mechanism is vertically arranged at the downstream end bend to extend the reciprocating clearing rod with an end clearing head into the inner cavity of the downstream end vertical section. The reciprocating clearing rod with an end clearing head can reciprocate vertically in the inner cavity of the aisle of the downstream end vertical section to clean the condensate in the cavity of the downstream end vertical section, thereby ensuring the smooth flow of the distillation channel and avoiding ineffective distillation, thereby ensuring and improving production efficiency. The strong support and high permeability bottom confluence type support screen plate can prevent deformation through strong support, and reduce and avoid the formation of sponge titanium bottom skin titanium through high permeability. The downward flow of the support screen plate is evenly distributed through the bottom confluence, further reducing and avoiding the formation of sponge titanium bottom skin titanium. In short, it has the advantages of preventing aisle blockage, improving aisle flow capacity, preventing large cover deformation and air leakage, high screen plate support strength to prevent deformation, good flow uniformity, reducing and avoiding the formation of sponge titanium lumps and bottom titanium skin, and achieving high-efficiency production of more than 18 tons.

[0005] As an optimization, the through-flow supporting sieve plate is a sieve top circular plate with a diameter smaller than the inner diameter of the reactor, and is provided with side trough openings for the magnesium chloride pipes to extend downward. On the inner side of the outer edge of the lower surface of the sieve top circular plate, an outer opening circular ring vertical plate with an opening edge extending downward to the side trough opening is fixedly arranged downward. Around the central through-flow hole of the sieve top circular plate, an inner opening circular ring vertical plate with the same direction as the outer opening circular ring vertical plate and with a lower end lower than the outer opening circular ring vertical plate is fixedly arranged downward. On the lower surface of the sieve top circular plate between the inner and outer opening circular ring vertical plates, radially convex arc bottom vertical plates with a circumferential interval distribution and a bottom lower than the inner opening circular ring vertical plate are fixedly arranged downward; between the two pairs of inner and outer opening edges of the inner and outer opening circular ring vertical plates, two side-connected lower convex arc bottom vertical plates fixedly arranged downward from the lower surface of the sieve top circular plate are connected. The sieve top circular plate with a diameter smaller than the inner diameter of the reactor provides a uniform side gap downward channel for the downward flowing liquid, which is beneficial to avoiding a hard core of titanium sponge ingot and providing a confluence support for the bottom confluence. The outer opening circular ring vertical plate fixedly arranged downward on the inner side of the outer edge of the lower surface of the sieve top circular plate can provide a surrounding return buffer space for the downward confluence of the above-mentioned peripheral gap, which is more beneficial to the downward confluence. The same-direction openings of the inner and outer opening circular ring vertical plates and the two side-connected lower convex arc bottom vertical plates form a lateral channel flowing towards the magnesium chloride pipes at the center. The outer opening circular ring vertical plate, the radially convex arc bottom vertical plates and the side-connected lower convex arc bottom vertical plates obtain a full and stable support from the spherical bottom of the reactor to provide a strong, stable, uniform and comprehensive reliable support for the sieve top circular plate, preventing the sieve plate from deforming.

[0006] Between the two side-connected lower convex arc bottom vertical plates, between adjacent radially convex arc bottom vertical plates, and between the radially convex arc bottom vertical plates and their adjacent side-connected lower convex arc bottom vertical plates, the sieve top circular plate is provided with one row or multiple rows of radially spaced-apart plate surface through-flow holes with a circumferential interval distribution. On the outer opening circular ring vertical plate section between adjacent lower convex arc bottom vertical plates, one or more radially spaced-apart bottom through-flow grooves are provided. The two side-connected lower convex arc bottom vertical plates are respectively provided with circumferential bottom through-flow grooves. The plate surface through-flow holes provide a reliable channel for the downward fluid. One or more radially spaced-apart bottom through-flow grooves provided on the outer opening circular ring vertical plate section between adjacent lower convex arc bottom vertical plates can ensure an orderly sub-channel confluence of the downward flow to the bottom. The two side-connected lower convex arc bottom vertical plates are respectively provided with circumferential bottom through-flow grooves for confluence to the lateral channel through the lower convex arc bottom vertical plates. In short, comprehensively, it can achieve strong support, high through-flow and bottom confluence.

[0007] As an optimization, the openings of the inner and outer opening circular ring vertical plates are openings with the same direction and the same width, and the two side-connected lower convex arc bottom vertical plates are parallel to each other, forming a stable lateral channel; the circumferential bottom through-flow grooves are opened in the inner section of the side-connected lower convex arc bottom vertical plates, which can avoid the appearance of dead corners in the material flow.

[0008] As an optimization, the central through-flow hole is larger than the plate surface through-flow holes; or it is more than three porous holes with a uniformly spaced distribution. This is beneficial to matching the through-flow capacity of the central through-flow with the through-flow capacity of the heat dissipation cylinder.

[0009] As an optimization, at least two columns of evenly spaced plate surface through-flow holes are opened in the fan-shaped area of the top sieve plate between adjacent radially downward convex arc bottom vertical plates, which is beneficial to evenly distribute the downward flow trend; the inner ends of the edge-connected downward convex arc bottom vertical plates are juxtaposed and adjacent to the opening edges of the inner and outer opening circular ring vertical plates with the inner ends of the adjacent downward convex arc bottom vertical plates, which is beneficial to ensure the support strength at the lateral channel; at least one column of plate surface through-flow holes is opened in the fan-shaped area of the top sieve plate between the edge-connected downward convex arc bottom vertical plate and its adjacent radially downward convex arc bottom vertical plate, which is beneficial to balance the downward flow state with other fan-shaped areas.

[0010] As an optimization, the lower edges of the outer opening circular ring vertical plate, the adjacent radially downward convex arc bottom vertical plate, and the lower edges of the edge-connected downward convex arc bottom vertical plate are in line with the spherical cut bottom of the reactor, achieving full and stable support at the bottom of the plate; a middle opening circular ring vertical plate with a bottom higher than the bottom height of the radially downward convex arc bottom vertical plate is fixedly installed downward under the top sieve plate between the inner and outer opening circular ring vertical plates to provide a channel for the radial bottom flow; the middle opening circular ring vertical plate is intermittently fixedly connected to the radially downward convex arc bottom vertical plate and the edge-connected downward convex arc bottom vertical plate to provide circumferential support for the radially downward convex arc bottom vertical plate and the edge-connected downward convex arc bottom vertical plate. An outwardly convex annular opening flange is fixedly installed at the top of the inner opening circular ring vertical plate to strengthen the support for the top sieve plate and the heat dissipation cylinder thereon. A sieve plate for a large-scale reduction distillation equipment for producing sponge titanium with an energy-saving and efficient production capacity of more than 18 tons is provided, and a ejector is not required for taking out, greatly improving the quality and production efficiency.

[0011] As an optimization, the aisle heat preservation pipeline adopts the inner wall of a stainless steel bellows or the inner and outer walls of a stainless steel bellows with a heat-resistant insulation layer in the middle jacket. It can not only prevent deformation but also ensure the convenience and reliability of butt joint, and further prevent the blockage and narrowing of the aisle pipeline, affecting the distillation efficiency through enhanced heat preservation.

[0012] As an optimization, the external heat preservation layer is an insulating paint layer, on which an insulating and heat-insulating layer and an outer cover layer of stainless steel plate with a polished mirror surface on the inner surface are sequentially arranged to strengthen heat preservation for further energy saving; an external insulating paint layer is further arranged outside the outer cover layer of stainless steel plate. To further strengthen heat preservation.

[0013] As an optimization, the upper cover flange is fixedly connected downward with a feeding pipe and a lower cover plug with a heat preservation layer on the upper part of the central pipe for connecting the aisle heater, which is beneficial to reducing the heat dissipation and heat preservation of the lower cover plug.

[0014] As an optimization, the lower cover plug is an open barrel type, the upper open barrel mouth is fixedly connected to the lower side of the upper cover flange with a heat insulation layer, and the upper open barrel bottom is respectively fixedly connected to the feeding pipe and the center pipe upward through the feeding port and the center port arranged in parallel, and the upper end of the center pipe is used to connect the aisle heater through the heat-resistant and corrosion-resistant sealing gasket and the flange. It is to use the anti-deformation and anti-leakage reactor cover to reduce equipment costs, improve product quality and production efficiency. When producing sponge titanium, the vacuuming speed is fast, the bottom skin titanium is reduced, and the superior product rate and production efficiency are greatly improved. The production method using an automatic clearing device does not require manual clearing, and greatly shortens the production time, greatly improving product quality and production efficiency. The production method (flange connection) using corrugated stainless steel anti-deformation and anti-leakage aisle electric heater improves product quality, shortens equipment docking time, and improves production efficiency.

[0015] This new type provides large-scale reduction distillation equipment for the production of energy-saving and efficient sponge titanium of more than 18 tons. By inventing this set of electric heating furnaces of more than 18 tons, reactors of more than 18 tons, cast reinforced multi-layer rib plates in series to prevent deformation and ventilation screen plates, reinforced multi-layer rib plates in series to prevent deformation and gas leakage, large reactor covers, automatic plugging devices, flange-connected corrugated stainless steel anti-deformation and gas leakage aisle electric heaters, and a complete set of equipment with thermal insulation coating added to the outside of the furnace shell, energy consumption can be saved while the production capacity of sponge titanium is increased, production time can be shortened while product quality is improved, and the foundation for energy-saving and efficient production of sponge titanium is laid to promote high-efficiency and high-quality development of the sponge titanium industry.

[0016] After adopting the above technical scheme, the large-scale reduction distillation device of the utility model for high-energy-efficiency production of sponge titanium of more than 18 tons has the advantages of preventing aisle blockage, improving the flow capacity of the aisle, preventing deformation and air leakage of the large cover, high support strength of the sieve plate to prevent deformation, good flow uniformity, reducing and avoiding the formation of titanium skin at the bottom of the sponge titanium lump, and no ejector is required for taking out, achieving the advantage of high-energy-efficiency production of more than 18 tons. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a large-scale reduction distillation device for producing titanium sponge with a capacity of more than 18 tons and high energy efficiency according to the utility model. Figure 2 It is a structural schematic diagram of the large cover part of the reactor in a large-scale reduction distillation device for producing sponge titanium with a capacity of more than 18 tons and high energy efficiency according to the utility model. Figure 3 The utility model is a schematic diagram of the structure of the reactor sieve plate in the large-scale reduction distillation device for producing sponge titanium with a capacity of more than 18 tons and high energy efficiency. DETAILED DESCRIPTION

[0018] As shown in the figure, the large-scale reduction and distillation device for high-energy-efficient production of titanium sponge above 18 tons of the present utility model is composed of two juxtaposed reactors 4 each with an outer electric heating furnace 1, an inner bottom-mounted through-flow support sieve plate 2 and its heat dissipation cylinder 3, which are connected through a reactor large cover 5 and a passage heating pipeline; an insulating layer is provided outside the electric heating furnace 1. The reactor large cover with a feeding pipe 52 and a central pipe 53 for connecting the passage heating and insulating pipeline is composed of an upper large cover flange 50 and a lower extended large cover plug 51 with an insulating layer on it. An annular cooling water channel 56 is provided on the periphery above the upper large cover flange 50. The passage heating and insulating pipeline is such that a passage heater 6 is arranged in the middle horizontal section of the passage insulating pipeline, with two end-turning downward extended vertical sections 61 at both ends of the middle horizontal section. At the turning of the downstream end, a reciprocating plugging and cleaning mechanism 7 is vertically arranged, in which a reciprocating plugging and cleaning rod 71 with a tool end cleaning head 70 is hermetically inserted into the inner cavity of the downstream end vertical section; the through-flow support sieve plate 2 is a strong-support high-through-flow bottom-converging type support sieve plate. Providing an insulating layer outside the electric heating furnace can improve the energy efficiency of the electric heating furnace. Compared with the existing passage heating pipeline, the passage heating and insulating pipeline can improve the energy efficiency while being beneficial to ensuring and improving the passage flow capacity, thereby improving the production efficiency. The passage heating and insulating pipeline is such that a passage heater is arranged in the middle horizontal section of the passage insulating pipeline, with two end-turning downward extended vertical sections at both ends of the middle horizontal section. At the turning of the downstream end, a reciprocating plugging and cleaning mechanism is vertically arranged, in which a reciprocating plugging and cleaning rod with a tool end cleaning head is hermetically inserted into the inner cavity of the downstream end vertical section. Then, through the reciprocating plugging and cleaning rod with the tool end cleaning head running vertically back and forth in the inner cavity of the downstream end downward extended vertical section of the passage, the condensate in the downstream end downward extended vertical section cavity can be cleaned, ensuring the smoothness of the distillation passage and avoiding ineffective distillation, thereby ensuring and improving the production efficiency. The strong-support high-through-flow bottom-converging type support sieve plate can prevent deformation through strong support, reduce and avoid the formation of the bottom skin titanium of the titanium sponge lump through high through-flow. Through bottom convergence, the downward flow of the support sieve plate is evenly distributed, further reducing and avoiding the formation of the bottom skin titanium of the titanium sponge lump. In short, it has the advantages of preventing blockage in the passage, improving the passage flow capacity, preventing deformation and air leakage of the large cover, having high sieve plate support strength to prevent deformation, good through-flow uniformity, reducing and avoiding the formation of the bottom skin titanium of the titanium sponge lump, and achieving high-energy-efficient production above 18 tons.

[0019] As Figure 3 shown, specifically, the through-flow support sieve plate is a sieve top circular plate 20 with a diameter smaller than the inner diameter of the reactor, provided with a side groove opening 21 for the downward insertion of the magnesium chloride pipe. On the inner side of the outer edge below the sieve top circular plate 20, an outer opening circular ring vertical plate 22 with an opening edge extending downward to the side groove opening 21 is fixedly arranged. Around the periphery of the central through-flow hole 201 of the sieve top circular plate 20, an inner opening circular ring vertical plate 23 is fixedly arranged downward in the same direction as the outer opening circular ring vertical plate 22, and the lower end of the inner opening circular ring vertical plate 23 is lower than the outer opening circular ring vertical plate 22. On the lower surface of the sieve top circular plate 20 between the inner and outer opening circular ring vertical plates 23 and 22, radially downward convex arc bottom vertical plates 24 with a circumferential interval distribution and a bottom lower than the inner opening circular ring vertical plate 23 are fixedly arranged downward; between the two pairs of inner and outer opening edges of the inner and outer opening circular ring vertical plates 23 and 22, two side-connected downward convex arc bottom vertical plates 25 fixedly arranged downward from the lower surface of the sieve top circular plate 20 are connected.

[0020] The top sieve circular plate 20 is between two side-connected downward convex arc bottom vertical plates 25, between adjacent radially downward convex arc bottom vertical plates 24, and between the radially downward convex arc bottom vertical plate 24 and its adjacent side-connected downward convex arc bottom vertical plate 25, and is provided with one or multiple columns of radially spaced-apart plate surface through-flow holes 202 that are circumferentially spaced-apart. On the outer opening circular ring vertical plate 22 section between adjacent downward convex arc bottom vertical plates, one or more radially spaced-apart bottom through-flow grooves 221 are provided, and the two side-connected downward convex arc bottom vertical plates 25 are respectively provided with circumferential bottom through-flow grooves 251. The openings of the inner and outer opening circular ring vertical plates 23 and 22 are openings with the same direction and the same width, and the two side-connected downward convex arc bottom vertical plates 25 are parallel to each other; the circumferential bottom through-flow groove 251 is opened in the inner section of the side-connected downward convex arc bottom vertical plate 25. The central through-flow hole 201 is larger than the plate surface through-flow hole 202; it can also be more than three holes with evenly distributed intervals.

[0021] More specifically, in the fan-shaped area of the top sieve circular plate 20 between adjacent radially downward convex arc bottom vertical plates 22, two columns of spaced-apart and juxtaposed plate surface through-flow holes 202 are provided. The inner ends of the side-connected downward convex arc bottom vertical plates 25 and the inner ends of their adjacent downward convex arc bottom vertical plates 24 are juxtaposed and adjacent to the opening edges of the inner and outer opening circular ring vertical plates 23. In the fan-shaped area of the top sieve circular plate 20 between the side-connected downward convex arc bottom vertical plate 25 and its adjacent radially downward convex arc bottom vertical plate 24, one column of plate surface through-flow holes 202 is provided.

[0022] Even more specifically, the lower edge of the outer opening circular ring vertical plate 22, the lower edge of the adjacent radially downward convex arc bottom vertical plate 24, and the lower edge of the side-connected downward convex arc bottom vertical plate 25 are in spherical contact with the bottom of the reactor 4; below the top sieve circular plate 20 between the inner and outer opening circular ring vertical plates 23 and 22, a middle opening circular ring vertical plate 26 with a bottom higher than the bottom height of the radially downward convex arc bottom vertical plate 24 is fixedly installed downward, and the middle opening circular ring vertical plate 26 is intermittently fixedly connected to the radially downward convex arc bottom vertical plate 24 and the side-connected downward convex arc bottom vertical plate 25. An outwardly convex ring-shaped opening flange 27 is fixedly installed at the top of the inner opening circular ring vertical plate 24. In the figure, the dotted line outside the top sieve circular plate 20 is the inner wall 28 of the reactor.

[0023] Specifically, the aisle heat preservation pipeline uses the inner wall of a stainless steel bellows or the inner and outer walls of a stainless steel bellows with an intermediate jacket heat insulation layer. Preferably, the externally provided heat insulation layer is a heat insulation coating layer, and an insulating heat insulation layer and an outer cover layer of stainless steel plate with a polished mirror surface on the inner surface are sequentially arranged outside the heat insulation coating layer. More preferably, an outer heat insulation coating layer is further provided outside the stainless steel plate outer cover layer.

[0024] Specifically, as Figures 1-2As shown in the figure, the upper cover flange 50 is fixedly connected downward with a feeding pipe 52 and a lower large cover plug 51 with a heat insulation layer on it, which is used to connect the central pipe 53 of the aisle heater. The lower large cover plug 51 is in the shape of an upper-open barrel. The upper-open barrel mouth is fixedly connected with the upper cover flange 50 with a heat insulation layer on it. The bottom of the upper-open barrel is fixedly connected upward with the feeding pipe 52 and the central pipe 53 respectively through the juxtaposed feeding port and central port. The upper end of the central pipe 53 is used to fixedly connect the aisle heater through a heat-resistant and corrosion-resistant gasket and flange. The lifting lugs in the figure are labeled 55. An annular cooling water channel 56 is provided on the periphery above the upper cover flange 50.

[0025] In summary, the large-scale reduction and distillation device for high-energy efficiency production of titanium sponge with a capacity of over 18 tons of the present utility model has the advantages of preventing blockage in the aisle, improving the flow capacity of the aisle, preventing deformation and air leakage of the large cover, having high sieve plate support strength to prevent deformation, good flow-through uniformity, reducing and avoiding the formation of the bottom skin titanium of the titanium sponge lump, and being taken out without a jacking machine, realizing high-energy efficiency production of over 18 tons.

Claims

1. A large-scale reduction distillation device for producing titanium sponge with high energy efficiency of more than 18 tons, wherein two parallel reactors each with an outer outer electric heating furnace and an inner bottom with a permeable support sieve plate and a heat dissipation tube are connected through a large reactor cover and a passage heating pipeline; characterized in that The electric heating furnace is provided with an insulation layer outside, a feeding pipe and a reactor cover of a central pipe for connecting the channel heating and insulation pipeline. The reactor cover is composed of an upper cover flange and a lower extended cover plug with an insulation layer on the upper cover. An annular cooling water channel is arranged on the outer periphery of the upper cover flange. The aisle heating and insulation pipeline is an aisle heater arranged in the middle horizontal section of the aisle insulation pipeline. Both ends of the middle horizontal section are bent and extended to the end vertical section. A reciprocating clearing mechanism is vertically arranged at the downstream end bend to allow a reciprocating clearing rod with an end clearing head to be sealed and extended into the inner cavity of the downstream end vertical section. The permeable support screen plate is a strong support and high permeability bottom converging type support screen plate.

2. The large-scale reduction distillation device for producing titanium sponge with high energy efficiency of more than 18 tons according to claim 1 is characterized in that The permeable flow support sieve plate is a sieve top circular plate with a diameter smaller than the inner diameter of the reactor, and is provided with a side notch for the magnesium chloride tube to extend downward. An outer opening circular plate with an opening extending to the side notch is fixed downwardly on the inner side of the outer edge of the bottom of the sieve top circular plate. An inner opening circular plate with a lower end lower than the outer opening circular plate and the same direction as the outer opening circular plate is fixed downwardly on the periphery of the central permeable flow hole of the sieve top circular plate. A radial downward convex arc bottom plate with a bottom lower than the inner opening circular plate is fixed downwardly on the bottom of the sieve top circular plate between the inner and outer opening circular plates. Two side-connected downward convex arc bottom plates are fixed downwardly from the bottom of the sieve top circular plate. The screen top circular plate is provided with one row or multiple rows of radially spaced plate surface flow holes distributed at intervals in the circumferential direction between two side-connected lower convex arc bottom vertical plates, between adjacent radial lower convex arc bottom vertical plates, and between a radial lower convex arc bottom vertical plate and its adjacent side-connected lower convex arc bottom vertical plate. One or more radial bottom flow grooves distributed at intervals are provided on the outer opening circular ring vertical plate section between adjacent lower convex arc bottom vertical plates, and two side-connected lower convex arc bottom vertical plates are respectively provided with circumferential bottom flow grooves.

3. The large-scale reduction distillation device for producing titanium sponge with high energy efficiency of more than 18 tons according to claim 2 is characterized in that The openings of the inner and outer opening circular ring vertical plates are openings of the same direction and width, and the two side-connected lower convex arc bottom vertical plates are parallel to each other; the circumferential bottom flow groove is arranged in the inner section of the side-connected lower convex arc bottom vertical plates.

4. The large-scale reduction distillation device for producing titanium sponge with high energy efficiency of more than 18 tons according to claim 2 is characterized in that The central flow hole is larger than the plate surface flow hole; or it can be more than three holes evenly distributed at intervals.

5. The large-scale reduction distillation device for producing titanium sponge with high energy efficiency of more than 18 tons according to claim 2 is characterized in that At least two rows of plate surface flow holes are arranged in parallel in the fan-shaped area of ​​the screen top circular plate between adjacent radial downward convex arc bottom vertical plates, the inner end of the side-connected lower convex arc bottom vertical plate is parallel to the inner end of the adjacent downward convex arc bottom vertical plate and is adjacent to the opening edge of the inner and outer open circular ring vertical plates, and at least one row of plate surface flow holes is arranged in the fan-shaped area of ​​the screen top circular plate between the side-connected lower convex arc bottom vertical plate and the adjacent radial downward convex arc bottom vertical plate.

6. A large-scale reduction distillation device for producing titanium sponge with high energy efficiency of more than 18 tons according to any one of claims 2 to 5, characterized in that The lower edge of the outer opening circular ring vertical plate, the lower edge of the adjacent radial downward convex arc bottom vertical plate and the lower edge of the side connected downward convex arc bottom vertical plate coincide with the spherical cut bottom of the reactor; a middle opening circular ring vertical plate with a bottom higher than the bottom height of the radial downward convex arc bottom vertical plate is fixed downward under the screen top circular plate between the inner and outer opening circular ring vertical plates, and the middle opening circular ring vertical plate is intermittently fixed to the radial downward convex arc bottom vertical plate and the side connected downward convex arc bottom vertical plate.

7. The large-scale reduction distillation device for producing titanium sponge with high energy efficiency of more than 18 tons according to claim 1 is characterized in that The aisle insulation pipeline adopts the inner wall of a stainless steel corrugated pipe or the inner and outer walls of a stainless steel corrugated pipe with an intermediate jacket heat-resistant insulation layer.

8. The large-scale reduction distillation device for producing titanium sponge with high energy efficiency of more than 18 tons according to claim 1 is characterized in that The external thermal insulation layer is a thermal insulation layer and a stainless steel plate outer cover layer with a polished mirror surface arranged in sequence outside the thermal insulation coating layer.

9. The large-scale reduction distillation device for producing titanium sponge with high energy efficiency of more than 18 tons according to claim 1, characterized in that The upper large cover flange is fixedly connected downwardly with a feeding pipe and a lower large cover plug provided with a thermal insulation layer on a central tube connected to a channel heater.

10. The large-scale reduction distillation device for producing titanium sponge with high energy efficiency of more than 18 tons according to claim 9, characterized in that The lower large cover plug is an open barrel type, the upper open barrel mouth is fixedly connected to the inner circumference of the upper large cover flange, the upper open barrel bottom is respectively fixedly connected to the feeding pipe and the center pipe upward through the feeding port and the center port arranged in parallel, and the upper end of the center pipe is used to connect to the aisle heater through a heat-resistant and corrosion-resistant sealing gasket and a flange.

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