Flaky sodium hydroxide adding device for molybdic acid production

Abstract

The utility model discloses a flaky sodium hydroxide feeding device for molybdic acid production, which comprises an evaporation reaction kettle, a stirring mechanism and a pH sensor probe are arranged in the evaporation reaction kettle, the pH sensor probe is electrically connected with a pH tester, a feeding port is arranged at the top of the evaporation reaction kettle, a feeding pipe is mounted at the position of the feeding port, and the pH tester is electrically connected with the feeding pipe. The utility model relates to the technical field of molybdic acid preparation, which utilizes the impact crushing assembly in the storage hopper to crush flaky sodium hydroxide into small particles, and further feeds the small particles of sodium hydroxide into the feeding pipe through the spiral feeding assembly. The extrusion type material pushing assembly is started to feed granular sodium hydroxide in the feeding pipe into the evaporation reaction kettle through the turnover type plugging assembly on the lower portion, the structure is simple, the automation degree is high, operation is stable, and when feeding operation is not carried out, the turnover type plugging assembly at the lower end of the feeding pipe can plug the feeding pipe, so that the feeding efficiency is improved. And water vapor is prevented from entering the feeding pipe in the evaporation reaction operation process.

Description

TECHNICAL FIELD

[0001] The utility model relates to molybdic acid preparation technical field, concretely is a kind of flaky sodium hydroxide feeding device for molybdic acid production. BACKGROUND

[0002] Molybdic acid is an inorganic compound, and molecular formula is H2MoO4.It refers to hydrated form of molybdenum trioxide and related matters, usually as hydrate form MoO3·2H2O, molecular weight is 179.97, is white or slightly yellow monoclinic system columnar crystalline or powder.The application number CN201611230900 is disclosed in the invention patent application, a kind of preparation method of high-purity molybdic acid, by adding flaky sodium hydroxide to molybdate solution is pretreated after evaporation, when crystalline appears, dissolve with pure water, then add nitric acid and acidify, solid-liquid separation, drying, obtain high-purity molybdic acid.However, in the prior art, flaky sodium hydroxide is added to molybdate solution in the process of pretreatment, to realize the mode of adding a little bit many times, mostly manual flaky sodium hydroxide feeding operation is carried out, and the labor intensity is relatively large, and due to the strong corrosiveness of sodium hydroxide, there is certain security risk, in view of this, in-depth research is conducted for the above problems, and the present case is generated. CONTENT OF UTILITY MODEL

[0003] In view of the deficiencies of the prior art, the utility model provides a kind of flaky sodium hydroxide feeding device for molybdic acid production, to solve the problems raised in background art.

[0004] To achieve the above object, the utility model is realized by the following technical scheme: a kind of flaky sodium hydroxide feeding device for molybdic acid production, including evaporation reaction kettle, stirring mechanism and pH sensor probe are arranged in the evaporation reaction kettle, the pH sensor probe is electrically connected with pH tester, the top of the evaporation reaction kettle is equipped with feeding port, the feeding port position is equipped with feeding pipe, the lower end of the feeding pipe is symmetrically equipped with turnover type plugging component, the upper end of the feeding pipe is equipped with extrusion type pushing assembly, one end of the extrusion type pushing assembly extends into the feeding pipe and is slidingly sealed with the inner wall of the feeding pipe, the extrusion type pushing assembly one side is equipped with storage hopper, impact crushing assembly is arranged in the storage hopper, the lower end of the storage hopper is equipped with screw feeding assembly along the inclined direction, one end of the screw feeding assembly is connected with the side wall of the feeding pipe.

[0005] The above-mentioned turnover type plugging component includes support, fixed shaft, semicircular flap, connecting seat and torsion spring, the support is symmetrically arranged on the lower end side wall of the feeding pipe, the fixed shaft is arranged on the support, the semicircular flap is located on the opening position of the lower end of the feeding pipe and is rotationally connected with the fixed shaft through the connecting seat, the torsion spring is sleeved on the outside of the fixed shaft and one end is connected with the support, the other end is connected with the connecting seat.

[0006] The above-mentioned extrusion-type feeding assembly includes a bracket, an electric telescopic rod, a push rod, and a feeding head. The bracket is located outside the feeding tube, the electric telescopic rod is located on the bracket, one end of the push rod is connected to the telescopic end of the electric telescopic rod, and the feeding head is slidably inserted into the feeding tube and fixedly connected to the lower end of the push rod.

[0007] The aforementioned impact crushing assembly includes a drive mechanism, a rotating shaft, and impact crushing rollers. The drive mechanism is located above the storage hopper, the rotating shaft is installed on the output end of the drive mechanism, and the impact crushing rollers are evenly installed on the side wall of the rotating shaft.

[0008] The aforementioned spiral feeding assembly includes a feeding pipe, a servo motor, a reducer, and a spiral guide rod. The feeding pipe is arranged at the lower end of the storage hopper along an inclined direction and one end is connected to the side wall of the feeding pipe. The drive end of the servo motor is connected to the input end of the reducer. The spiral feeding rod is rotatably arranged inside the feeding pipe and one end is connected to the output end of the reducer.

[0009] A rubber sealing gasket is attached to the upper surface of the aforementioned semi-circular flap.

[0010] This invention provides a flake sodium hydroxide dosing device for molybdic acid production. It offers the following advantages: This flake sodium hydroxide dosing device improves upon existing evaporation reactors by installing a feeding pipe and a storage hopper at the top of the reactor. The flake sodium hydroxide required for molybdic acid preparation is temporarily stored in the storage hopper. Molybdate solution is quantitatively added to the evaporation reactor according to the production operation procedures. When flake sodium hydroxide needs to be added to the solution, the impact crushing component in the storage hopper is first activated to break the flake sodium hydroxide into small particles. These particles are then fed into the feeding pipe via a screw conveyor. The extrusion pusher component then pushes the granular sodium hydroxide from the feeding pipe into the evaporation reactor via a lower flip-type sealing component. The device features a simple structure, high automation, and is designed for multiple small-batch intermittent feeding. It operates stably. When not performing any dosing operations, the flip-type sealing component at the bottom of the feeding pipe can seal the pipe, preventing water vapor from entering during the evaporation reaction. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the main structure of a flake sodium hydroxide dosing device for molybdic acid production according to the present invention.

[0012] Figure 2 This utility model Figure 1 A partially enlarged structural diagram.

[0013] Figure 3 The present utility model Figure 2 A magnified schematic diagram of the structure at position a.

[0014] In the figure: 1, evaporation reactor; 2, stirring mechanism; 3, pH sensor probe; 4, feeding pipe; 5, storage hopper; 6, support; 7, fixed shaft; 8, semicircular flap; 9, connecting seat; 10, torsional spring; 11, bracket; 12, electric telescopic rod; 13, push rod; 14, push head; 15, driving mechanism; 16, rotating shaft; 17, impact crushing roller; 18, feeding pipe; 19, servo motor; 20, speed reducer; 21, spiral guide rod; 22, rubber sealing pad. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0016] Embodiment: combined with the drawings in the description Figures 1-3It can be known that the application specifically designs a flaky sodium hydroxide feeding device for molybdic acid production, a stirring mechanism 2 and a pH sensor probe 3 are arranged in an evaporation reactor 1, the pH sensor probe 3 is electrically connected with a pH tester, a feeding port is arranged at the top of the evaporation reactor 1, a feeding pipe 4 is arranged at the feeding port position, a turnover type plugging assembly is symmetrically arranged at the lower end of the feeding pipe 4, an extrusion type pushing assembly is arranged at the upper end of the feeding pipe 4, one end of the extrusion type pushing assembly extends into the feeding pipe 4 and is in sliding sealing with the inner wall surface of the feeding pipe 4, a storage hopper 5 is arranged at one side of the extrusion type pushing assembly, an impact crushing assembly is arranged in the storage hopper 5, a spiral feeding assembly is arranged at the lower end of the storage hopper 5 along the inclined direction, one end of the spiral feeding assembly is communicated with the side wall of the feeding pipe 4, the existing evaporation reactor 1 is improved, the feeding pipe 4 and the storage hopper 5 are arranged at the top of the evaporation reactor 1, the flaky sodium hydroxide required in the preparation of molybdic acid is temporarily stored in the storage hopper 5, and the molybdate solution is quantitatively added into the evaporation reactor 1 according to the production operation procedure, when the flaky sodium hydroxide needs to be added into the solution, the impact crushing assembly in the storage hopper 5 is started first, the flaky sodium hydroxide is crushed into small particles, the small particle sodium hydroxide is further fed into the feeding pipe 4 through the spiral feeding assembly, the extrusion type pushing assembly is started, the particle sodium hydroxide in the feeding pipe 4 is added into the evaporation reactor 1 through the lower turnover type plugging assembly, the structure is simple, the automation degree is high, the intermittent feeding mode design of multiple small amounts is met, the operation is stable, when the feeding operation is not performed, the turnover type plugging assembly at the lower end of the feeding pipe 4 can plug the feeding pipe 4, so that the water vapor in the evaporation reaction operation process is prevented from entering the feeding pipe 4; the pH value of the premixed solution is monitored by using the pH sensor probe 3, and the feeding speed and the feeding amount are controlled according to the monitoring result.

[0017] In the specific implementation process, as a preferred arrangement, the above-mentioned turnover type plugging assembly comprises a support 6, a fixed shaft 7, a semicircular flap 8, a connecting seat 9 and a torsional spring 10, the support 6 is symmetrically arranged on the side wall of the lower end of the feeding pipe 4, the fixed shaft 7 is arranged on the support 6, the semicircular flap 8 is located at the opening position of the lower end of the feeding pipe 4 and is rotationally connected with the fixed shaft 7 through the connecting seat 9, the torsional spring 10 is sleeved outside the fixed shaft 7 and one end thereof is connected with the support 6 and the other end thereof is connected with the connecting seat 9, in use, the extrusion type pushing assembly moves downward to push the particle sodium hydroxide in the feeding pipe 4 downward, and extrudes the semicircular flap 8, so that the semicircular flap 8 is opened downward under the support of the fixed shaft 7, so as to add the sodium hydroxide into the evaporation reactor 1 to mix with the molybdate solution, after the addition is completed, the extrusion type pushing assembly moves upward, and the semicircular flap 8 is re-locked at the lower end port position of the feeding pipe 4 under the reset elastic force of the torsional spring 10, wherein the upper end surface of the semicircular flap 8 is attached with a rubber sealing pad 22, which can further improve the sealing property between the semicircular flap 8 and the feeding pipe 4.

[0018] In the specific implementation process, as a preferred arrangement, the above-mentioned extrusion pushing assembly includes a bracket 11, an electric telescopic rod 12, a pushing rod 13 and a pushing head 14, the bracket 11 is arranged outside the feeding pipe 4, the electric telescopic rod 12 is arranged on the bracket 11, one end of the pushing rod 13 is connected with the telescopic end of the electric telescopic rod 12, and the pushing head 14 is slidingly inserted into the feeding pipe 4 and fixedly connected with the lower end of the pushing rod 13, in use, the position of the telescopic end of the electric telescopic rod 12 is adjusted to drive the pushing rod 13 and the pushing head 14 to act, so that the sodium hydroxide particles in the feeding pipe 4 are added into the evaporation reactor 1.

[0019] In the specific implementation process, as a preferred arrangement, the above-mentioned extrusion pushing assembly includes a bracket 11, an electric telescopic rod 12, a pushing rod 13 and a pushing head 14, the bracket 11 is arranged outside the feeding pipe 4, the electric telescopic rod 12 is arranged on the bracket 11, one end of the pushing rod 13 is connected with the telescopic end of the electric telescopic rod 12, and the pushing head 14 is slidingly inserted into the feeding pipe 4 and fixedly connected with the lower end of the pushing rod 13, in use, the position of the telescopic end of the electric telescopic rod 12 is adjusted to drive the pushing rod 13 and the pushing head 14 to act, so that the sodium hydroxide particles in the feeding pipe 4 are added into the evaporation reactor 1.

[0020] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A sheet-shaped sodium hydroxide feeding device for molybdic acid production, comprising an evaporation reactor, characterized in that, The evaporation reactor is provided with a stirring mechanism and a pH sensor probe which is electrically connected with a pH tester.

2. The sheet-shaped sodium hydroxide feeding device for molybdic acid production according to claim 1, characterized by, The turning blocking assembly comprises a support, a fixed shaft, a semicircular flap, a connecting seat and a torsional spring.

3. The sheet-shaped sodium hydroxide feeding device for molybdic acid production according to claim 1, characterized in that, The extrusion pushing assembly comprises a support, an electric telescopic rod, a pushing rod and a pushing head.

4. The sheet-shaped sodium hydroxide feeding device for molybdic acid production according to claim 1, characterized in that, The impact crushing assembly comprises a driving mechanism, a rotating shaft and impact crushing rollers.

5. The sheet-shaped sodium hydroxide feeding device for molybdic acid production according to claim 1, characterized in that, The semicircular flap is attached with a rubber sealing gasket on the upper end face.

6. The sheet-shaped sodium hydroxide feeding device for molybdic acid production according to claim 2, characterized by ​

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