An inverted U-shaped magnesium chloride discharge device for breaking the siphon of a steam boiler

Abstract

The utility model provides an inverted U-shaped magnesium chloride discharge device for breaking siphon of a steaming furnace, comprising a horizontal pipe, a movable sleeve, a vertical pipe, a heat-insulating sleeve, a slip-on flange and a connecting flange, one end of the horizontal pipe is sealed and connected to the discharge pipe of the reactor through a slip-on flange, and the other end is connected to the movable sleeve through a connecting flange and bolts, the other end of the horizontal pipe is inserted into the movable sleeve and has a gap with the inner wall of the movable sleeve, the lower part of the sleeve is inserted into the vertical pipe, and there is a gap between the inner wall of the vertical pipe and the lower outer wall of the movable sleeve, the heat-insulating sleeve is sleeved on the outside of the vertical pipe, and the lower mouth of the vertical pipe is used to connect the material lifting bag or the fixed tank. The utility model can effectively avoid siphoning and prevent product air intake, and can also prevent clogging and facilitate disassembly and cleaning, thereby improving the safety of high-temperature molten magnesium chloride and magnesium discharge operations from the source.

Description

Technical Field

[0001] The utility model relates to the technical field of metallurgical chemical production, in particular to a magnesium chloride discharge device for breaking the siphon of an inverted U-shaped steam recovery furnace. Background Art

[0002] In the process of sponge titanium reduction production, the magnesium chloride produced by the reduction reaction needs to be continuously discharged into the magnesium chloride receiving ladle regularly and quantitatively. At present, most of the domestic sponge titanium production adopts an inverted U-shaped furnace to produce sponge titanium, and the magnesium chloride discharge method is upper discharge, that is, a magnesium chloride discharge pipe is installed in the reactor. After each batch of materials is added, the magnesium chloride generated by the reaction needs to be discharged from the bottom of the reactor through the discharge pipe from bottom to top to the outside of the reactor, and then discharged into the ladle or fixed tank, and then the ladle or fixed tank containing magnesium chloride is transported to the next process by vehicle for electrolysis. Since the receiving port of the magnesium chloride receiving ladle or fixed tank is lower than the liquid level in the reactor, a large amount of smoke will be generated in the process of receiving materials using a chute, which is not conducive to environmental protection. At the same time, due to the poor sealing effect of the chute, the residual magnesium chloride in the chute will be hydrolyzed quickly, which will cause greater safety risks when discharging the next batch of materials. Therefore, most companies use pipelines to discharge high-temperature molten magnesium chloride into the receiving ladle or fixed tank. Since the magnesium chloride receiving bag or fixed tank receiving port is lower than the liquid level in the reactor, siphon phenomenon is very likely to occur in the process of discharging magnesium chloride. The discharge speed and discharge amount are extremely difficult to control, affecting product quality. If the siphon cannot be broken in time, the high-temperature melt of magnesium chloride will overflow, causing personal and equipment safety accidents, affecting safe production and accurate discharge. Therefore, it is necessary to improve the discharge device. Utility Model Content

[0003] According to the technical problems raised above, a magnesium chloride discharge device for breaking the siphon of an inverted U-shaped steam boiler is provided. The magnesium chloride discharge device provided by the utility model can effectively prevent the siphon phenomenon from occurring during the discharge process, and the discharge speed is easy to control, thereby achieving the purpose of safely and accurately discharging magnesium chloride and reducing the deformation of the magnesium chloride pipe. The technical means adopted by the utility model are as follows:

[0004] The invention discloses an inverted U-shaped magnesium chloride discharge device for breaking the siphon of a steam-reducing furnace, comprising: a horizontal pipe, a movable sleeve, a vertical pipe, a heat-insulating sleeve, a slip-on flange and a connecting flange, wherein one end of the horizontal pipe is sealedly connected to a discharge pipe of a reactor through a slip-on flange, and the other end is connected to the movable sleeve through a connecting flange and bolts, the other end of the horizontal pipe is inserted into the movable sleeve and has a gap with the inner wall of the movable sleeve, the lower part of the sleeve is inserted into the vertical pipe, and there is a gap between the inner wall of the vertical pipe and the lower outer wall of the movable sleeve, the heat-insulating sleeve is sleeved on the outside of the vertical pipe, and the lower opening of the vertical pipe is used for connecting a material receiving ladle or a fixed tank.

[0005] Furthermore, the inner diameter of the movable sleeve is 6 mm larger than the outer diameter of the transverse tube, the transverse tube is inserted into the movable sleeve by 50-60 mm, and the gap between the movable sleeve and the transverse tube is 2-3 mm.

[0006] Furthermore, the inner diameter of the vertical pipe is 8 mm larger than the outer diameter of the movable sleeve, the movable sleeve is inserted into the vertical pipe by 150-200 mm, and the gap between the vertical pipe and the movable sleeve is 3-5 mm.

[0007] Furthermore, the length of the movable sleeve is greater than the distance between the vertical pipe and the horizontal pipe by 150-250 mm, and the distance that the movable sleeve extends into the vertical pipe is not less than 150 mm.

[0008] Furthermore, the transverse tube is a bent tube facing laterally downward, including an integrated transverse section tube and a vertical section tube, the end of the transverse section tube is connected to the reactor, and the lower end of the vertical section tube is partially inserted into the movable sleeve.

[0009] Furthermore, it also includes a sealing cap. Under non-discharging conditions or after discharging is completed, the movable sleeve is in a dismantled state, and the sealing cap is sealed and connected to the connecting flange at the discharge port of the horizontal pipe through a silicone pad.

[0010] Furthermore, an argon filling tube is provided on the sealing cap.

[0011] Furthermore, a metal winding gasket is used to tighten and seal the connection between the slip-on flange and the discharge pipe of the reactor.

[0012] Furthermore, aluminum silicate fiber felt is filled between the vertical pipe and the insulation sleeve.

[0013] Furthermore, the materials of the horizontal tube, movable sleeve and vertical tube are all stainless steel, and the material of the thermal insulation sleeve is carbon steel.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] 1. The utility model can effectively prevent the siphon phenomenon from occurring during the discharge process, and the discharge speed is easy to control, so as to achieve the purpose of safely and accurately discharging magnesium chloride and reducing the deformation of the magnesium chloride tube. It can effectively avoid siphon and prevent the product from entering the air, and can also prevent blockage and facilitate disassembly and cleaning, thus improving the safety of high-temperature molten magnesium chloride and magnesium discharge operations from the source.

[0016] 2. In the utility model, the high-temperature molten magnesium chloride is discharged from the reactor to the horizontal pipe, flows to the vertical pipe by gravity through the movable sleeve, and then enters the material receiving ladle. The high-temperature melt is discharged through the horizontal pipe, the movable sleeve and the vertical pipe, which can prevent siphoning and is easy to operate. It is convenient to seal the horizontal pipe in time after the discharge is completed to prevent air from entering the reactor and affecting the quality of the sponge titanium product.

[0017] 3. The utility model fills aluminum silicate fiber felt between the vertical pipe and the insulation sleeve, which can protect the vertical pipe from bending deformation under high temperature and reduce temperature loss after discharge, and prevent condensate attached to the vertical pipe from hydrolyzing.

[0018] Based on the above reasons, the utility model can be widely promoted in the fields of metallurgical and chemical production. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 The utility model is a structural schematic diagram of a magnesium chloride discharge device for breaking the siphon of an inverted U-shaped steam recovery furnace.

[0021] Figure 2 It is a side view of the utility model.

[0022] Figure 3 It is a top view of the utility model.

[0023] Figure 4 It is a side view of the connection between the transverse tube and the sealing cap in the utility model.

[0024] Figure 5 It is a structural schematic diagram of the bolt of the utility model.

[0025] Figure 6 This is a schematic diagram of the movable sleeve in the utility model being removed and dropped onto the vertical pipe flange.

[0026] In the figure: 1. horizontal pipe; 2. movable sleeve; 3. vertical pipe; 4. insulation sleeve; 5. slip-on flange; 6. connecting flange; 7. sealing cap; 8. argon filling port; 9. bolts. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] The thermal reduction reaction of magnesium will continuously produce magnesium chloride. In the sponge titanium reduction production process, the magnesium chloride produced by the reduction reaction needs to be discharged into the magnesium chloride receiving bag regularly and quantitatively. Since the receiving port of the magnesium chloride receiving bag is lower than the liquid level in the reactor, siphoning is very likely to occur during the discharge of magnesium chloride. The discharge speed and amount are extremely difficult to control. The discharge pipe is severely deformed due to high temperature, and the siphon cannot be broken in time, causing the high-temperature melt of magnesium chloride to overflow, resulting in personal and equipment safety accidents, affecting safe production and accurate discharge.

[0029] In order to solve the existing problems, the utility model provides an inverted U-shaped magnesium chloride discharge device for breaking siphon of a reduction distillation furnace, and relates to a high-temperature molten magnesium chloride discharge device for preventing siphoning in the discharge process of magnesium chloride and magnesium high-temperature melt in a reduction distillation reactor. The magnesium chloride discharge device provided by the utility model can effectively prevent the siphon phenomenon from occurring during the discharge process, and the discharge speed is easy to control, thereby achieving the purpose of safely and accurately discharging magnesium chloride and reducing the deformation of the magnesium chloride pipe.

[0030] The utility model discharge device comprises a horizontal pipe 1, a movable sleeve 2, a vertical pipe 3, a heat-insulating sleeve 4, a loose flange 5, a connecting flange 6, a sealing cap 7, an argon-filled pipe 8, and bolts 9.

[0031] The high-temperature molten magnesium chloride is discharged from the reactor to the horizontal pipe 1, flows to the vertical pipe 3 through the movable sleeve 2, and then enters the material receiving ladle. The high-temperature melt is discharged through the movable sleeve, which can prevent siphoning and is easy to operate. It is convenient to seal the horizontal pipe 1 in time after the discharge is completed to prevent air from entering the reactor and affecting the quality of the sponge titanium product.

[0032] In this embodiment, the movable sleeve 2 is connected with the horizontal pipe 1 and the vertical pipe 3, and the high-temperature molten magnesium chloride is discharged by self-pressure relief in a segmented manner.

[0033] In this embodiment, the horizontal pipe 1, the movable sleeve 2, and the vertical pipe 3 are made of stainless steel to prevent corrosion and increase the service life of the discharge device.

[0034] In this embodiment, the sealing cap 7 is added with an argon filling port joint. After the discharge is completed, the flange of the sealing cap 7 is connected to the flange of the cross pipe 1, and the argon filling port joint is connected to the argon pipeline with a vacuum hose to play a sealing and argon filling role.

[0035] In this embodiment, aluminum silicate fiber felt (existing technology) is filled between the vertical pipe 3 and the insulation sleeve 4 to protect the vertical pipe 3 from bending deformation and temperature loss after discharge under high temperature conditions, and prevent condensate attached to the vertical pipe 3 from hydrolyzing.

[0036] The utility model relates to a sectional discharge device for breaking siphon.

[0037] First, the siphon phenomenon can be eliminated. The pipe diameters of each section are different, that is, the inner diameter of the vertical pipe 3 is about 8mm larger than the outer diameter of the movable sleeve 2, so that the gap is guaranteed to be about 4mm, and the inner diameter of the movable sleeve 2 is about 6mm larger than the outer diameter of the horizontal pipe 1, so that the gap is guaranteed to be about 3mm. The purpose is that during the discharge process, the high-temperature melt is depressurized in sections from the gaps left, so that the suction from bottom to top is dispersed in sections, thereby eliminating the siphon phenomenon. Specifically, the pipe diameter gap between the movable sleeve 2 and the vertical pipe 3 and the horizontal pipe 1 is the key to ensuring the elimination of the siphon phenomenon. It is ensured that the gap between each section of the pipeline is between 2-5mm, and the diameters of the horizontal pipe 1, the movable sleeve 2, and the vertical pipe 3 are small, medium, and large respectively, so that the movable sleeve 2 can move freely between the horizontal pipe 1 and the vertical pipe 3, and the horizontal pipe 1 is placed in the movable sleeve 2, and the movable sleeve 2 is placed in the vertical pipe 3. The vertical pipe 3 can move freely with the expansion and contraction of the horizontal pipe 1 to prevent irregular deformation.

[0038] Second, it can be quickly sealed, easy to disassemble and assemble, and prevent product air intake and blockage of the horizontal tube 1. After each discharge, the bolts connecting the movable sleeve 2 and the horizontal tube 1 are removed, and the movable sleeve 2 is dropped on the flange of the vertical tube 3. The outlet of the horizontal tube 1 can be sealed with the sealing cap 7 to prevent air from entering the product. Argon is filled from the sealing cap 7 to make the molten magnesium chloride in the horizontal tube 1 flow back into the reactor to prevent blockage of the horizontal tube 1. Specifically, the sealing cap 7 is provided with an argon filling tube 8, which can be filled with argon to prevent air from entering the reactor and to back-blow the residual magnesium chloride and magnesium in the horizontal tube 1 into the reactor to prevent blockage of the horizontal tube 1.

[0039] Third, it is easy to clean. The magnesium chloride discharge device outside the reactor is divided into three sections, so that each section is easy to disassemble and assemble independently and easy to clean. The slip-on flange 5 is convenient for connecting the cross pipe 1 with the reactor, and the bolt 9 is a connecting part for quickly connecting the movable sleeve 2 with the cross pipe 1.

[0040] The use of this discharge device for magnesium chloride and magnesium discharge can not only effectively avoid siphoning and prevent product air intake, but also prevent blockage and facilitate disassembly and cleaning, thereby improving the safety of high-temperature molten magnesium chloride and magnesium discharge operations from the source.

[0041] Reference Figure 1 The utility model of the magnesium chloride discharge device for breaking the siphon of the inverted U-shaped steam boiler adopts a segmented discharge device, with an insulation sleeve 4 and a sealing cap 7, which can break the siphon, prevent the product from entering, prevent the horizontal pipe 1 from being blocked, and prevent the vertical pipe 3 from being deformed and hydrolyzed. Specifically:

[0042] 1. The vertical pipe 3 is made of stainless steel, and the external insulation sleeve 4 is made of carbon steel. Aluminum silicate fiber felt is used in the middle to ensure that the vertical pipe 3 is not easily burned through and corroded. The length of the movable sleeve 2 must be greater than the distance between the vertical pipe 3 and the horizontal pipe 1 by 150-250mm. The insulation sleeve 4 ensures that the vertical pipe 3 reduces deformation under high temperature conditions and prevents hydrolysis under low temperature conditions. The sealing cap 7 can seal the horizontal pipe 1 after the discharge is completed, and argon is reversely filled into the reactor through the argon filling pipe 8.

[0043] 2. Installation operation

[0044] (1) Place the vertical pipe 3 and the insulation sleeve 4 vertically on the platform so that the lower end of the vertical pipe 3 is basically consistent with the material receiving port of the lifting bag or fixed tank, and reserve a certain gap around to compensate for the displacement of the horizontal pipe 1 due to the extension or shortening.

[0045] (2) The movable sleeve 2 is naturally placed in the vertical pipe 3, not connected, not sealed, and can be freely swung and raised and lowered. After the movable sleeve 2 rises and connects with the horizontal pipe 1, ensure that the distance that the movable sleeve 2 extends into the vertical pipe 3 is not less than 150 mm. When the movable sleeve 2 is not connected to the horizontal pipe 1, ensure that the distance from the discharge port of the horizontal pipe 1 is not less than 200 mm, so as to facilitate the disassembly and assembly of the sealing cap 7.

[0046] (3) Connect the horizontal pipe 1 to the discharge pipe of the reactor with a slip-on flange 5, and use a metal winding gasket to tighten and seal it, so that the discharge port of the horizontal pipe 1, i.e., the connecting flange 6, is aligned with the movable sleeve 2.

[0047] (4) The sealing cap 7 is sealed through the connecting flange 6 using a silicone pad that can withstand a temperature of about 200° C., and argon gas is filled into the reactor through the argon filling tube 8.

[0048] 3. Discharging operation

[0049] (1) First, the pressure in the reactor is unloaded to a slight positive pressure, and then the pressure is released again through the argon filling tube 8. From the pressure release situation, it is determined whether the cross tube 1 is blocked and the high-temperature melt flows out. If there is no abnormality, the sealing cap 7 and the sealing gasket can be removed.

[0050] (2) Pull up the movable sleeve 2 and connect it to the horizontal tube 1 with bolts 9. No sealing or tightening is required. The bolts 9 are used for quick connection. The connection requirements between the movable sleeve 2 and the horizontal tube 1 are as follows: the horizontal tube 1 needs to be inserted into the movable sleeve 2 by 50-60 mm, with a gap of 2-3 mm around it. The movable sleeve 2 needs to be inserted into the vertical tube 3 by 150-200 mm, with a gap of 3-5 mm around it, and ensure that the movable sleeve 2 can swing freely between the horizontal tube 1 and the vertical tube 3.

[0051] 4. Disassembly operation

[0052] (1) The horizontal tube 1 is easy to disassemble. After the movable sleeve 2 is lowered to the position of the vertical tube 3, the horizontal tube 1 can be directly disassembled.

[0053] (2) After the vertical pipe 3 is displaced and misaligned with the horizontal pipe 1, the movable sleeve 2 and the vertical pipe 3 can be freely disassembled.

[0054] The utility model discloses an inverted U-shaped magnesium chloride discharge device for breaking the siphon of a steam recovery furnace, which can break the siphon phenomenon in the discharge process, ensure the sealing effect, and accurately discharge the materials. At the same time, it is convenient to disassemble and assemble, and the maintenance is reasonable (it can be maintained in sections), thus solving the problem of siphon generation in the discharge process, making the discharge safer and more reliable and the product quality more controllable from the source.

[0055] The above description is only used to illustrate some structures and basic principles of use of the utility model, and is not intended to limit the utility model to the specific structure and applicable scope shown and described in the inverted U-shaped steam boiler to break the magnesium chloride discharge device and method. Therefore, all corresponding modifications and equivalents that may be used belong to the scope of the patent applied for the utility model.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. An inverted U-shaped magnesium chloride discharge device for breaking the siphon of a steam boiler, characterized in that: include: A horizontal pipe (1), a movable sleeve (2), a vertical pipe (3), an insulating sleeve (4), a slip-on flange (5) and a connecting flange (6); one end of the horizontal pipe (1) is sealedly connected to the discharge pipe of the reactor through the slip-on flange (5), and the other end is connected to the movable sleeve (2) through the connecting flange (6) and a bolt (9); the other end of the horizontal pipe (1) is inserted into the movable sleeve (2) and there is a gap between the inner wall of the movable sleeve (2); the lower part of the sleeve (2) is inserted into the vertical pipe (3), and there is a gap between the inner wall of the vertical pipe (3) and the lower outer wall of the movable sleeve (2); the insulating sleeve (4) is sleeved on the outside of the vertical pipe (3), and the lower end of the vertical pipe (3) is used to connect to a material receiving ladle or a fixed tank.

2. The magnesium chloride discharge device for breaking the siphon of the inverted U-shaped steam recovery furnace according to claim 1 is characterized in that: The inner diameter of the movable sleeve (2) is 6 mm larger than the outer diameter of the transverse tube (1); the transverse tube (1) is inserted into the movable sleeve (2) by 50-60 mm; and the gap between the movable sleeve (2) and the transverse tube (1) is 2-3 mm.

3. The magnesium chloride discharge device for breaking the siphon of the inverted U-shaped steam recovery furnace according to claim 1 is characterized in that: The inner diameter of the vertical pipe (3) is 8 mm larger than the outer diameter of the movable sleeve (2); the movable sleeve (2) is inserted into the vertical pipe (3) by 150-200 mm, and the gap between the vertical pipe (3) and the movable sleeve (2) is 3-5 mm.

4. The magnesium chloride discharge device for breaking the siphon of the inverted U-shaped steam boiler according to claim 1 is characterized in that: The length of the movable sleeve (2) is greater than the distance between the vertical pipe (3) and the horizontal pipe (1) by 150-250 mm, and the distance that the movable sleeve (2) extends into the vertical pipe (3) is not less than 150 mm.

5. The magnesium chloride discharge device for breaking the siphon of the inverted U-shaped steam boiler according to claim 1 is characterized in that: The transverse tube (1) is a transversely downwardly bent tube, comprising an integrated transverse section tube and a vertical section tube, the end of the transverse section tube is connected to the reactor, and the lower end of the vertical section tube is partially inserted into the movable sleeve (2).

6. The magnesium chloride discharge device for breaking the siphon of the inverted U-shaped steam recovery furnace according to claim 1 is characterized in that: It also includes a sealing cap (7). When the material is not discharged or after the material is discharged, the movable sleeve (2) is in a dismantled state, and the sealing cap (7) is sealed and connected to the connecting flange (6) at the discharge port of the transverse pipe (1) via a silicone pad.

7. The magnesium chloride discharge device for breaking the siphon of the inverted U-shaped steam recovery furnace according to claim 6 is characterized in that: The sealing cap (7) is provided with an argon filling tube (8).

8. The magnesium chloride discharge device for breaking the siphon of an inverted U-shaped steam recovery furnace according to claim 1, characterized in that: The connection between the slip-on flange (5) and the discharge pipe of the reactor is fastened and sealed by a metal winding gasket.

9. The magnesium chloride discharge device for breaking the siphon of an inverted U-shaped steam boiler according to claim 1, characterized in that: Aluminum silicate fiber felt is filled between the vertical pipe (3) and the thermal insulation sleeve (4).

10. The magnesium chloride discharge device for breaking the siphon of an inverted U-shaped steam-reducing furnace according to claim 1, characterized in that: The materials of the transverse tube (1), the movable sleeve (2) and the vertical tube (3) are all stainless steel, and the material of the thermal insulation sleeve (4) is carbon steel.

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