A heating device for removing iron from nickel sulfamate

Abstract

The utility model relates to nickelate processing technical field, and disclose a kind of heating device for nickel sulfamate iron removal, comprising: reaction tank;Heat conduction structure, heat conduction structure includes jacket, upper layer electric heating rod, middle layer electric heating rod, bottom layer electric heating rod and rib, jacket is fixed with reaction tank welding, upper layer electric heating rod, middle layer electric heating rod and bottom layer electric heating rod are all fixedly installed with jacket and located same vertical axis, gradient heating mode, matching heat conduction oil natural convection characteristics (hot oil rises, cold oil sinks), low-power area is set to the top to avoid top overburning, bottom high-power area compensates heat loss, each group of electric heating rod is equipped with spare heating unit, realize fault automatic switching by PLC control system, guarantee continuous production stability, secondly by setting rib, by bottom layer electric heating rod increase the contact surface area of reaction tank and heat conduction oil, the uniformity and efficiency of reaction tank heated can be improved.

Description

Technical Field

[0001] This utility model relates to the field of nickel compound treatment technology, and in particular to a heating device for removing iron from nickel aminosulfonate. Background Technology

[0002] A search revealed that in existing nickel sulfamate production processes, heating devices commonly suffer from uneven temperature distribution and localized overheating, leading to sulfate (SO4) ionization. 2- Problems include increased production and high energy consumption. For example, patent CN202411938002.5 uses chelating resin to remove iron, but it does not solve the problem of the effect of temperature gradient on iron removal efficiency during heating; the high-temperature furnace body has an unreasonable layout of heating elements (such as concentrated distribution of silicon carbide rods) which leads to a temperature difference of up to 50°C in the furnace, affecting the purity of the product.

[0003] Therefore, we propose a heating device for removing iron from nickel aminosulfonate. Utility Model Content

[0004] The present invention mainly solves the technical problems of large temperature difference and uneven heating in the above-mentioned heating devices, and provides a heating device for removing iron from nickel aminosulfonate.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a heating device for removing iron from nickel aminosulfonate, comprising: A reaction vessel, wherein material pipes are fixedly installed at both the top and bottom; A heat-conducting structure, installed outside the reaction vessel, is used to heat the reaction vessel and the materials inside. The heat-conducting structure includes a jacket, an upper heating rod, a middle heating rod, a bottom heating rod, and ribs. The jacket is welded and fixed to the reaction vessel, forming a heat-conducting cavity between the jacket and the reaction vessel. The heat-conducting cavity is filled with heat-conducting oil. The upper, middle, and bottom heating rods are all fixedly installed to the jacket and located on the same vertical axis. The upper, middle, and bottom heating rods can respectively heat the upper, middle, and lower layers of heat-conducting oil in the heat-conducting cavity. The ribs are fixedly connected to the reaction vessel, and the upper and bottom heating rods are also fixedly connected to the ribs.

[0006] In a preferred embodiment of this utility model, the reaction vessel is a metal vessel, the jacket is an annular sleeve, the jacket is fixed to the reaction vessel by full welding, and a circulating pump is fixedly installed at the bottom of the jacket to spray heat transfer oil into the heat transfer chamber.

[0007] In a preferred embodiment of this utility model, the upper heating rod, the middle heating rod, and the bottom heating rod are all connected to a controller. The upper heating rod is fixedly installed near the top of the jacket, the bottom heating rod is fixedly installed near the bottom of the jacket, and the middle heating rod is horizontally arranged and installed in the middle of the reaction vessel.

[0008] In a preferred embodiment of this utility model, the heat-conducting structure further includes guide posts, which are fixedly installed with ribs. The guide posts and ribs together form a guide fluid for guiding the heat transfer oil, and several guide fluids are equidistantly arranged on the inner wall of the jacket.

[0009] In a preferred embodiment of this utility model, the rib is a spiral plate, the guide post is a column with a semi-circular horizontal cross-section, the rib is welded and fixed to the guide post, the upper and lower ends of the guide post are both welded and fixed to the sleeve, and the upper and lower ends of the rib do not contact the sleeve.

[0010] In a preferred embodiment of this utility model, the heat-conducting structure further includes a first thermocouple, a second thermocouple, and a third thermocouple, all of which are fixedly installed with the jacket and respectively detect the temperature of the heat-conducting oil in the upper, middle, and lower layers.

[0011] In a preferred embodiment of this utility model, the first thermocouple is fixedly installed at the top of the jacket, the third thermocouple is fixedly installed at the bottom of the jacket, and the second thermocouple is fixedly installed in the middle of the reaction vessel. The first thermocouple, the second thermocouple, and the third thermocouple are all connected to the controller.

[0012] This invention provides a heating device for removing iron from nickel aminosulfonate. It has the following beneficial effects: 1. This heating device for removing iron from nickel sulfamate utilizes a gradient heating method, matching the natural convection characteristics of the heat transfer oil (hot oil rises, cold oil sinks). A low-power zone at the top prevents overheating, while a high-power zone at the bottom compensates for heat loss. Each set of heating rods is equipped with a backup heating unit, and automatic fault switching is achieved through a PLC control system to ensure continuous production stability. Furthermore, by setting ribs, the contact surface area between the reaction vessel and the heat transfer oil is increased through the bottom heating rods, which improves the uniformity and efficiency of heating the reaction vessel.

[0013] 2. This heating device for removing iron from nickel sulfamate uses spiral ribs and semi-circular guide columns to force the heat transfer oil to form a spiral flow path, eliminating the "edge stagnation zone" of traditional annular cavities. This design can improve the uniformity of heat transfer oil flow rate and reduce the risk of local hot spots.

[0014] 3. This heating device for removing iron from nickel sulfamate dynamically adjusts the power of the heating rods in each zone through an algorithm, achieving temperature fluctuations of ≤±1.5℃, reducing the temperature difference of the heat transfer oil, and improving the temperature control of the reaction vessel, which is superior to the traditional single-point control scheme. Attached Figure Description

[0015] Figure 1 This is one of the overall perspective views of this utility model; Figure 2 This is the second overall perspective view of the present utility model; Figure 3 This is a schematic diagram of the internal structure of the jacket of this utility model; Figure 4 This is a partial sectional view of the jacket of this utility model; Figure 5 This is a perspective view of the ribs and guide posts of this utility model.

[0016] Legend: 10. Reaction vessel; 11. Jacket; 12. Upper heating rod; 13. Middle heating rod; 14. Bottom heating rod; 15. Rib; 16. Guide column; 20. First thermocouple; 21. Second thermocouple; 22. Third thermocouple. Detailed Implementation

[0017] A heating device for removing iron from nickel aminosulfonate, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, it includes: The reaction vessel 10 has material pipes fixedly installed at both its top and bottom. A heat-conducting structure, located outside the reaction vessel 10, is used to heat the reaction vessel 10 and the materials inside. The heat-conducting structure includes a jacket 11, an upper heating rod 12, a middle heating rod 13, a bottom heating rod 14, and ribs 15. The jacket 11 is welded and fixed to the reaction vessel 10, forming a heat-conducting cavity between the jacket 11 and the reaction vessel 10. The heat-conducting cavity is filled with heat-conducting oil. The upper heating rod 12, middle heating rod 13, and bottom heating rod 14 are all fixedly installed to the jacket 11 and located on the same vertical axis. The upper heating rod 12, middle heating rod 13, and bottom heating rod 14 can respectively heat the upper, middle, and lower layers of heat-conducting oil in the heat-conducting cavity. The ribs 15... The rib 15 is fixedly connected to the reaction vessel 10. The upper heating rod 12 and the lower heating rod 14 are both fixedly connected to the rib 15. The reaction vessel 10 is a metal vessel. The jacket 11 is an annular sleeve. The jacket 11 is fixed to the reaction vessel 10 by full welding. A circulating pump is fixedly installed at the bottom of the jacket 11 to spray heat transfer oil in the heat transfer chamber. The upper heating rod 12, the middle heating rod 13 and the lower heating rod 14 are all connected to a controller. The upper heating rod 12 is fixedly installed near the top of the jacket 11. The lower heating rod 14 is fixedly installed near the bottom of the jacket 11. The middle heating rod 13 is horizontally set and installed in the middle of the reaction vessel 10. In this design, the upper heating element 12 has the lowest power, the middle heating element 13 has the second highest power, and the bottom heating element 14 has the highest power. The power of the upper heating element 12, the middle heating element 13, and the bottom heating element 14 are 50W / cm². 2 80W / cm 2 110W / cm 2This gradient heating method matches the natural convection characteristics of the heat transfer oil (hot oil rises, cold oil sinks). The low-power zone at the top can prevent overheating, while the high-power zone at the bottom compensates for heat loss. Each set of heating rods is equipped with a spare heating unit, and automatic fault switching is achieved through the PLC control system to ensure the stability of continuous production. Secondly, by setting ribs 15 and increasing the contact surface area between the reaction tank 10 and the heat transfer oil through the bottom heating rods 14, the uniformity and efficiency of heating of the reaction tank 10 can be improved.

[0018] like Figure 4 and Figure 5 As shown, the heat-conducting structure also includes a guide post 16, which is fixedly installed with the rib 15. The guide post 16 and the rib 15 together form a guide fluid for guiding the heat transfer oil. Several guide fluids are equidistantly arranged on the inner wall of the jacket 11. The rib 15 is a spiral plate, and the guide post 16 is a column with a semi-circular horizontal cross section. The rib 15 is welded and fixed to the guide post 16. The upper and lower ends of the guide post 16 are welded and fixed to the jacket 11. The upper and lower ends of the rib 15 do not contact the jacket 11. In this design, by setting spiral ribs 15 and semi-circular guide pillars 16, the heat transfer oil is forced to form a spiral flow path, eliminating the "edge stagnation zone" of the traditional annular cavity. This design can improve the uniformity of heat transfer oil flow rate and reduce the risk of local hot spots.

[0019] like Figure 3 and Figure 4 As shown, the heat-conducting structure also includes a first thermocouple 20, a second thermocouple 21, and a third thermocouple 22. All three thermocouples 20, 21, and 22 are fixedly installed in the jacket 11 and respectively detect the temperature of the heat-conducting oil in the upper, middle, and lower layers. The first thermocouple 20 is fixedly installed at the top of the jacket 11, the third thermocouple 22 is fixedly installed at the bottom of the jacket 11, and the second thermocouple 21 is fixedly installed in the middle of the reaction vessel 10. All are connected to the controller. In this scheme, the first thermocouple 20, the second thermocouple 21, and the third thermocouple 22 are all armored thermocouples with double-layer protective sleeves (the inner layer is Hastelloy C276 for corrosion protection, and the outer layer is alumina ceramic insulation) to adapt to the highly corrosive environment of nickel sulfamate solution. Based on multi-point temperature data, the power of the heating rods in each zone is dynamically adjusted through an algorithm to achieve temperature fluctuation ≤ ±1.5℃, reduce the temperature difference of the heat transfer oil, and improve the temperature control of the reaction tank 10, which is superior to the traditional single-point control scheme.

[0020] The working principle of this utility model is as follows: the upper heating rod 12 has the lowest power, the middle heating rod 13 has the next highest power, and the bottom heating rod 14 has the highest power. The power of the upper heating rod 12, the middle heating rod 13, and the bottom heating rod 14 are respectively 50W / cm². 2 80W / cm2 110W / cm 2 This gradient heating method matches the natural convection characteristics of the heat transfer oil (hot oil rises, cold oil sinks). The low-power zone at the top avoids overheating, while the high-power zone at the bottom compensates for heat loss. The spiral ribs 15 and semi-circular guide pillars 16 force the heat transfer oil to form a spiral flow path, eliminating the "edge stagnation zone" of traditional annular cavities. This design improves the uniformity of the heat transfer oil flow rate. The first thermocouple 20, the second thermocouple 21, and the third thermocouple 22 are all armored thermocouples with double-layer protective sleeves (the inner layer is Hastelloy C276 for corrosion protection, and the outer layer is alumina ceramic insulation) to adapt to the highly corrosive environment of nickel sulfamate solution. Based on multi-point temperature data, the power of the heating rods in each zone is dynamically adjusted through a fuzzy PID algorithm to achieve temperature fluctuations ≤ ±1.5℃, reducing the temperature difference of the heat transfer oil.

[0021] The reaction vessel 10 is in direct contact with the nickel sulfamate solution. Its inner wall and all welds should be made of ultra-low carbon austenitic stainless steel (such as 022Cr17Ni12Mo2, i.e. 316L), or its inner wall should be lined with Hastelloy C-276 plates with a thickness of not less than 3mm to resist long-term corrosion from the solution.

[0022] The inner wall of the jacket 11 in contact with the heat transfer oil can be made of low carbon steel, but the weld connecting it to the reaction vessel (10) must be made of the same corrosion-resistant material as the reaction vessel body to prevent corrosion and perforation from the outside. The protective sleeves of all thermocouples (first thermocouple 20, second thermocouple 21, third thermocouple 22) in contact with the medium must be made of Hastelloy C-276 or titanium (TA2) to ensure the reliability and accuracy of long-term measurements.

[0023] The rib 15 is a continuous spiral plate, and its helix angle (β) is preferably 30°~45°. The height (H) of the rib (15) is 1 / 3~1 / 2 of the radial width of the heat transfer cavity (for example, if the cavity width is 30mm, then the rib height is 10-15mm). This design can effectively disrupt the laminar sublayer of the heat transfer oil at low Reynolds numbers and enhance the turbulence effect, but will not cause excessive flow resistance.

[0024] The guide post 16 has a streamlined cross-section (such as semi-circular or teardrop shape), and its function is to support the spiral ribs 15 and further guide the oil flow, reducing the generation of eddies. Multiple guide fluids composed of ribs 15 and guide posts 16 are evenly distributed circumferentially along the inner wall of the jacket 11, preferably 4-6 in number. They work together to divide the traditional annular chamber into multiple continuous spiral flow channels, forcing the heat transfer oil to move upward in a spiral shape along the outer wall of the reaction tank 10, realizing the piston flow effect, greatly reducing the "edge stagnation zone" and "short-circuit flow", and ensuring uniform heat transfer.

[0025] The jacket 1) should have an oil drain port (not shown in the figure) at the bottom connected to the inlet of the circulating pump, and an oil filling port and an expansion tank interface at the top to facilitate the replacement and maintenance of the heat transfer oil.

[0026] The system should be equipped with multiple safety interlocks, including a heat transfer oil over-temperature alarm (set value is 30°C higher than the process temperature), a liquid level switch (monitors the minimum liquid level of the heat transfer oil to prevent dry burning), and a pressure sensor (monitors the outlet pressure of the circulating pump to prevent flow channel blockage). If any parameter exceeds the standard, the controller will immediately cut off the power supply to all heating rods and issue an audible and visual alarm.

[0027] The upper heating rod 12, the middle heating rod 13 and the bottom heating rod 14 should be installed with flanges, which can be directly disassembled from the outside of the jacket 11 without emptying the jacket 11 or the heat transfer oil, which greatly facilitates later maintenance and replacement.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A heating device for removing iron from nickel aminosulfonate, characterized in that, include: The reaction vessel (10) is equipped with a material pipe fixedly installed at both the top and bottom. A heat-conducting structure is installed outside the reaction vessel (10) to heat the reaction vessel (10) and the materials inside. The heat-conducting structure includes a jacket (11), an upper heating rod (12), a middle heating rod (13), a bottom heating rod (14), and ribs (15). The jacket (11) is welded and fixed to the reaction vessel (10), and a heat-conducting cavity is formed between the jacket (11) and the reaction vessel (10). The heat-conducting cavity is filled with heat-conducting oil. The upper heating rod... (12) The middle layer heating rod (13) and the bottom layer heating rod (14) are fixedly installed with the jacket (11) and located on the same vertical axis. The upper layer heating rod (12), the middle layer heating rod (13) and the bottom layer heating rod (14) can respectively heat the upper, middle and lower layers of heat-conducting oil in the heat-conducting cavity. The rib (15) is fixedly connected to the reaction tank (10). The upper layer heating rod (12) and the bottom layer heating rod (14) are fixedly connected to the rib (15).

2. The heating device for removing iron from nickel aminosulfonate according to claim 1, characterized in that: The reaction vessel (10) is a metal vessel, and the jacket (11) is an annular sleeve. The jacket (11) is fixed to the reaction vessel (10) by full welding. A circulating pump is fixedly installed at the bottom of the jacket (11) to spray heat transfer oil into the heat transfer chamber.

3. The heating device for removing iron from nickel aminosulfonate according to claim 1, characterized in that: The upper heating rod (12), the middle heating rod (13) and the bottom heating rod (14) are all connected to a controller. The upper heating rod (12) is fixedly installed near the top of the jacket (11), the bottom heating rod (14) is fixedly installed near the bottom of the jacket (11), and the middle heating rod (13) is horizontally set and installed in the middle of the reaction vessel (10).

4. The heating device for removing iron from nickel aminosulfonate according to claim 1, characterized in that: The heat-conducting structure also includes a guide post (16), which is fixedly installed with the rib (15). The guide post (16) and the rib (15) together form a guide fluid for guiding the heat transfer oil. Several guide fluids are equidistantly arranged on the inner wall of the jacket (11).

5. The heating device for removing iron from nickel aminosulfonate according to claim 4, characterized in that: The rib (15) is a spiral plate, and the guide post (16) is a column with a semi-circular horizontal cross section. The rib (15) and the guide post (16) are welded and fixed. The upper and lower ends of the guide post (16) are welded and fixed to the sleeve (11). The upper and lower ends of the rib (15) do not contact the sleeve (11).

6. The heating device for removing iron from nickel aminosulfonate according to claim 1, characterized in that: The heat-conducting structure also includes a first thermocouple (20), a second thermocouple (21), and a third thermocouple (22). The first thermocouple (20), the second thermocouple (21), and the third thermocouple (22) are all fixedly installed with the jacket (11) and respectively detect the temperature of the heat-conducting oil in the upper, middle, and lower layers.

7. The heating device for removing iron from nickel aminosulfonate according to claim 6, characterized in that: The first thermocouple (20) is fixedly installed on the top of the jacket (11), the third thermocouple (22) is fixedly installed on the bottom of the jacket (11), and the second thermocouple (21) is fixedly installed in the middle of the reaction vessel (10). The first thermocouple (20), the second thermocouple (21) and the third thermocouple (22) are all connected to the controller.

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