Variable cross-section energy dissipation device of nickel wet leaching autoclave discharging system
By introducing a variable cross-section energy dissipation device into the pressure vessel discharge system, and using energy dissipation pipes and blind flanges to reduce the slurry flow rate and pressure, the corrosion and wear problem of the leaching slurry on the pipeline was solved, and the stability and service life of the equipment were improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JINCHUAN GROUP NICKEL COBALT CO LTD
- Filing Date
- 2025-05-27
- Publication Date
- 2026-05-26
AI Technical Summary
The high flow rate and high pressure of the leaching slurry in the pressurized autoclave discharge system cause corrosion and wear of the pipe bends, resulting in a high failure rate and affecting the leaching rate and equipment stability.
A variable cross-section energy dissipation device, including an energy dissipation pipe and a blind flange, is introduced into the pressure vessel discharge system. The energy dissipation pipe reduces the slurry flow rate and pressure, thereby reducing the impact on the delivery pipe. The blind flange facilitates the replacement of worn parts.
It effectively prevents wear of infusion tubing, extends equipment lifespan, reduces failure rate, and ensures stable operation and leaching rate of the pressurizing vessel.
Smart Images
Figure CN224283935U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of pressure vessel equipment, and relates to a variable cross-section energy dissipation device for the discharge system of a nickel wet leaching pressure vessel. Background Technology
[0002] The pressurized reactor discharge system adopts a dual discharge configuration. The discharge pipe is made of S2205 stainless steel and discharges from the bottom of the fifth compartment of the pressurized reactor. After flash evaporation by the flash valve, it sequentially enters the primary buffer tank, the secondary buffer tank, and the flash tank, finally entering the thickener for thickening and separation. The primary and secondary buffer tanks in the pressurized reactor discharge system are connected by two sections of titanium pipe cut at a 45° angle and welded into a 90° right-angle elbow. During the operation of the pressurized reactor, the high flow rate, high pressure, and high acidity of the leaching slurry cause corrosion and wear of the 90° right-angle elbow, creating leaks. This results in a high failure rate and frequent maintenance of the discharge system, making it impossible to guarantee the continuous and stable operation of the pressurized reactor and severely affecting the leaching rate. Utility Model Content
[0003] The purpose of this invention is to address the problem of easy corrosion and wear of pipe bends during the discharge of leaching slurry in the prior art, and to provide a variable cross-section energy dissipation device for the discharge system of a nickel wet leaching pressurized kettle.
[0004] Therefore, the present invention adopts the following technical solution:
[0005] A variable cross-section energy dissipation device for a nickel wet leaching pressurized reactor discharge system includes a pressurized reactor connected to a discharge pipe. The discharge pipe is connected to a primary buffer tank, and the primary buffer tank is connected to a first inlet pipe. The first inlet pipe is connected to an energy dissipation pipe. One end of the energy dissipation pipe forms a conical inlet section, the other end forms a contraction section, and the middle section forms an expansion section. The lower part of the expansion section is connected to a second inlet pipe, which is connected to a secondary buffer tank. Further, a flash valve is connected to the top of the primary buffer tank, and the discharge pipe is connected to the flash valve.
[0006] Furthermore, the first infusion tube is positioned horizontally.
[0007] Furthermore, the energy dissipation tube is coaxially arranged with the first infusion tube.
[0008] Furthermore, a shut-off valve is provided on the second infusion tube.
[0009] Furthermore, the contraction section is connected to an end pipe, and a blind plate is installed at the end of the end pipe away from the energy dissipation pipe.
[0010] Furthermore, the secondary buffer tank is connected to a discharge pipe.
[0011] The beneficial effects of this utility model are as follows: an energy dissipation pipe is connected to one side of the primary buffer tank, which effectively reduces the flow rate and pressure of the slurry, thereby reducing the impact of the slurry on the second delivery pipe, preventing wear of the second delivery pipe, and effectively improving the service life of the second delivery pipe. A blind plate is installed at one end of the energy dissipation pipe, which facilitates timely replacement. The method of use is convenient and the cost is low. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of this utility model;
[0013] In the diagram, 1-pressurizing vessel, 2-discharge pipe, 3-primary buffer tank, 4-flash valve, 5-first infusion pipe, 6-energy dissipation pipe, 601-inlet section, 602-expansion section, 603-contraction section, 7-end pipe, 8-blind plate, 9-second infusion pipe, 10-secondary buffer tank, 11-stop valve, 12-discharge pipe. Detailed Implementation
[0014] The present invention will now be described in detail with reference to the accompanying drawings:
[0015] As shown in Figure 1, a variable cross-section energy dissipation device for a nickel wet leaching pressurized kettle discharge system includes a pressurized kettle 1, a discharge pipe 2 connected to the pressurized kettle 1, and a primary buffer tank 3 connected to the discharge pipe 2. Specifically, a flash valve 4 is connected to the top of the primary buffer tank 3, and the discharge pipe 3 is connected to the flash valve 4. The flash valve 4 can prevent the slurry from vaporizing when passing through a regular valve and control pressure changes, thereby reducing flashing and cavitation phenomena. The discharge pipe 2 can buffer the slurry into the primary buffer tank 3 through the flash valve 4. A first liquid delivery pipe 5 is horizontally connected to the side wall of the primary buffer tank 3. The first liquid delivery pipe 5 is connected to an energy dissipation pipe 6 coaxially arranged with the first liquid delivery pipe 5. The energy dissipation pipe 6 has a conical inlet section 601 at one end near the first liquid delivery pipe 5 and a conical outlet section 601 at the other end. The energy dissipation pipe 6 has a constriction section 603 with a shape-shaped structure. An expansion section 602 is formed in the middle of the energy dissipation pipe 6. The diameter of the expansion section 602 is larger than the diameter of the first liquid delivery pipe 5. The pressure of the slurry can be significantly reduced through the energy dissipation pipe 6. The constriction section 603 of the energy dissipation pipe 6 is connected to an end pipe 7. The end pipe 7 is coaxial with the first liquid delivery pipe 5 and has the same diameter. A blind plate 8 is installed at the end of the end pipe 7 away from the energy dissipation pipe 6. The blind plate 8 can be installed on the end pipe 7 with a flange for easy replacement. The lower part of the expansion section 602 of the energy dissipation pipe 6 is connected to a vertically arranged second liquid delivery pipe 9. The second liquid delivery pipe 9 is connected to a secondary buffer tank 10. A shut-off valve 11 is provided on the second liquid delivery pipe 9. The secondary buffer tank 10 is connected to a discharge pipe 12. The slurry discharged from the secondary buffer tank 10 can be transported to the flash tank through the discharge pipe 12.
[0016] The principle of this utility model is as follows:
[0017] The slurry in the pressure vessel 1 can be discharged through the discharge pipe 2. Within the discharge pipe 2, the slurry passes through the flash valve 4 into the primary buffer tank 3. The flash valve 4 prevents the slurry from vaporizing when passing through ordinary valves. Entering the primary buffer tank 3 effectively reduces the slurry flow rate. The slurry in the primary buffer tank 3 can be transported to the energy dissipation pipe 6 through the first delivery pipe 5. Upon entering the energy dissipation pipe 6, the slurry first passes through the inlet section 601. Within the inlet section 601, the gradually increasing cross-section reduces the slurry pressure. Then, it enters the expansion section 602. Due to the increased diameter of the expansion section 602, the slurry flow rate is effectively reduced, and some of the slurry... The slurry flows into the contraction section 603 through the expansion section 602 and then into the end pipe 7, where it is blocked by the blind plate 8, which further reduces the flow rate and provides a buffer. The blind plate 8 can be quickly replaced when it wears out. The slurry in the energy dissipation pipe 6 then enters the secondary buffer tank 10 through the second delivery pipe 9 at the bottom of the expansion section 602. Since the second delivery pipe 9 is vertically arranged, the impact of the slurry on the side wall of the second delivery pipe 9 when it enters the expansion section 602 is effectively reduced, thus improving the service life of the second delivery pipe 9. The second delivery pipe 9 then enters the secondary buffer tank 10 for further buffering and finally is transported to the flash tank through the discharge pipe 12.
Claims
1. A variable cross-section energy dissipation device for a discharge system of a nickel wet leaching pressurized kettle, comprising a pressurized kettle (1), wherein the pressurized kettle (1) is connected to a discharge pipe (2), characterized in that, The discharge pipe (2) is connected to a primary buffer tank (3), the primary buffer tank (3) is connected to a first infusion pipe (5), the first infusion pipe (5) is connected to an energy dissipation pipe (6), one end of the energy dissipation pipe (6) forms a conical inlet section (601), the other end forms a conical contraction section (603), the middle part of the energy dissipation pipe (6) forms an expansion section (602), the lower part of the expansion section (602) is connected to a second infusion pipe (9), and the second infusion pipe (9) is connected to a secondary buffer tank (10).
2. The variable cross-section energy dissipation device for the discharge system of a nickel wet leaching pressurized reactor according to claim 1, characterized in that, The top of the primary buffer tank (3) is connected to a flash valve (4), and the discharge pipe (2) is connected to the flash valve (4).
3. The variable cross-section energy dissipation device for the discharge system of a nickel wet leaching pressurized reactor according to claim 1, characterized in that, The first infusion tube (5) is set horizontally.
4. The variable cross-section energy dissipation device for the discharge system of a nickel wet leaching pressurized reactor according to claim 1, characterized in that, The energy dissipation tube (6) is coaxially arranged with the first infusion tube (5).
5. The variable cross-section energy dissipation device for the discharge system of a nickel wet leaching pressurized reactor according to claim 1, characterized in that, The second infusion tube (9) is equipped with a shut-off valve (11).
6. The variable cross-section energy dissipation device for the discharge system of a nickel wet leaching pressurized reactor according to claim 1, characterized in that, The contraction section (603) is connected to an end tube (7), and a blind plate (8) is installed at the end of the end tube (7) away from the energy dissipation tube (6).
7. The variable cross-section energy dissipation device for the discharge system of a nickel wet leaching pressurized reactor according to claim 1, characterized in that, The secondary buffer tank (10) is connected to a discharge pipe (12).