Drainage anti-blocking discharge device for waste oxygen of autoclave

Abstract

The utility model relates to the technical field of waste oxygen discharge of zinc hydrometallurgy, and discloses a drainage anti-blocking discharge device for waste oxygen of an autoclave, which comprises a waste oxygen pipe communicated between an exhaust pipe on the autoclave and a neutral leaching operation tank in a zinc leaching process, and one end of the waste oxygen pipe close to the exhaust pipe is communicated with a steam-water separator. The first valve is communicated with a waste oxygen pipe, a barometer is installed on the waste oxygen pipe, the waste oxygen pipe is communicated with a flow dredging pipe, the tail end of the flow dredging pipe is communicated with a flow dredging groove, and a second valve is installed on the flow dredging pipe; according to the utility model, the speed of forming sulfur crystals on the inner wall of the waste oxygen pipe by liquid sulfur can be effectively slowed down, the time of interfering the drift diameter of the waste oxygen pipe by the sulfur crystals and the liquid sulfur is prolonged, the increasing speed of pressure in the waste oxygen pipe is slowed down, and the period of normally discharging waste oxygen by the waste oxygen pipe can be effectively prolonged; the dismounting and washing frequency of the waste oxygen pipe is effectively reduced, the washing labor intensity is reduced, and fire and explosion accidents caused by increase of sulfur crystals can be effectively prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste oxygen discharge in hydrometallurgy of zinc, and specifically relates to a device for discharging waste oxygen from a pressure kettle with anti-blocking flow. Background Art

[0002] In the hydrometallurgical zinc smelting process, the two-stage oxygen pressure acid leaching process is currently mainly used to treat the high-iron zinc sulfide concentrate material. Among them, in the first stage of the pressure leaching process, the high-iron zinc sulfide concentrate and the leaching slag produced in the second stage are mixed and added to the slurry mixing tank for slurry mixing. After stirring evenly, an appropriate amount of surfactant lignin is added, and the slurry mixing is continued. Then, it is pumped into the pressure autoclave with the pre-prepared dilute sulfuric acid. When the temperature in the pressure autoclave is controlled to reach 130-160°C, industrial pure oxygen with a purity of 99.5% is introduced into the pressure autoclave to control the pressure in the autoclave. The pressure is 1.2MPa, heat preservation, and finally discharge; in the two-stage pressure leaching process, the high-iron zinc sulfide concentrate is added to the slurry mixing tank for slurry mixing, and then an appropriate amount of surfactant lignin is added after stirring evenly, and the slurry mixing is continued, and then the supernatant obtained by the first-stage pressure leaching with the additive sodium sulfate added in advance is pumped into the pressure autoclave, and when the temperature in the autoclave is controlled to reach 130-160°C, industrial pure oxygen with a purity of 99.5% is introduced into the pressure autoclave, and the pressure in the autoclave is controlled to be 0.8-1.2Mpa, heat preservation, and finally discharge.

[0003] In this way, the property of sulfuric acid to selectively leach zinc in high-iron sulfide zinc concentrate is utilized to make the zinc concentrate react in the sulfuric acid medium. Finally, zinc enters the solution in the form of zinc sulfate, while sulfur is oxidized and enters the slag in the form of elemental sulfur. The basic reaction is: ZnS+H2SO4+0.5O2=ZnSO4+S0+H2O, and the excess waste oxygen generated in the reaction process in the autoclave is discharged from the exhaust pipe. At present, for the discharge of waste oxygen in the autoclave, the waste oxygen is usually discharged to the intermediate leaching operation tank through the waste oxygen discharge pipe as an oxidant to replace manganese powder to enter the intermediate leaching operation process, so as to reduce the consumption of manganese powder in the zinc leaching process and reduce production costs.

[0004] However, since part of the liquid sulfur suspended in the waste oxygen in the autoclave will be discharged together with the waste oxygen during the discharge process, on the one hand, the liquid sulfur and the waste oxygen are discharged into the leaching process together, resulting in a waste of sulfur. On the other hand, the suspended liquid sulfur is easily condensed in the waste oxygen pipe to form liquid sulfur during the transportation process. The condensed liquid sulfur adheres to the inner wall of the pipe to form sulfur crystals or gathers at the bottom of the pipe. The increase in the collected liquid sulfur and sulfur crystals will gradually reduce the diameter of the waste oxygen pipe, thereby causing the pressure in the waste oxygen pipe to gradually increase with the operation time. Since the oxygen purity of the waste oxygen is still high, when the pressure in the waste oxygen pipe is greater than 1.0Mpa, the continuous friction between the waste oxygen and the crystallized sulfur is likely to cause fire and explosion accidents, which poses a great safety hazard. At present, the control of the pressure in the waste oxygen pipe can only be achieved by frequently disassembling and flushing the sulfur crystals in the waste oxygen pipe. The disassembly and flushing frequency is 5-7 days / time, which is labor-intensive, time-consuming and labor-intensive. Utility Model Content

[0005] In order to solve or partially solve the problems existing in the related technology, the utility model provides a device for draining and preventing blockage of waste oxygen from a pressurized autoclave. The device for draining and preventing blockage of waste oxygen from a pressurized autoclave can effectively slow down the speed of sulfur crystallization formed by liquid sulfur on the inner wall of a waste oxygen pipe, prolong the time for sulfur crystallization and liquid sulfur to interfere with the diameter of the waste oxygen pipe, thereby slowing down the speed of increasing pressure in the waste oxygen pipe, effectively prolonging the normal waste oxygen discharge period of the waste oxygen pipe, reducing the frequency of disassembly and flushing of the waste oxygen pipe, and effectively preventing fire and explosion accidents caused by increased sulfur crystallization.

[0006] The present application provides a device for draining and preventing blockage of waste oxygen from a pressure autoclave, comprising a waste oxygen pipe connected between an exhaust pipe on a pressure autoclave and a mid-immersion operation tank in a zinc leaching process, wherein one end of the waste oxygen pipe close to the exhaust pipe is connected to a steam-water separator, an air inlet of the steam-water separator is connected to the waste oxygen pipe, a water outlet is connected to a collection box through a drain pipe, and a first valve is connected to the exhaust port, wherein the first valve is connected to the waste oxygen pipe;

[0007] A pressure gauge is installed on one end of the waste oxygen pipe close to the intermediate immersion operation tank, and a drainage pipe is connected to the waste oxygen pipe at a position between the pressure gauge and the intermediate immersion operation tank, a drainage groove is connected to the end of the drainage pipe, and a second valve is installed on the drainage pipe.

[0008] Optionally, in one embodiment, the first valve is an automatic control valve, and the opening of the first valve controls the pressure in the autoclave to be 1.2 MPa.

[0009] Optionally, in one solution, the drainage pipe is installed below the waste oxygen pipe.

[0010] Optionally, in one solution, the second valve is installed on the drainage pipe at a position close to one end of the waste oxygen pipe, and the second valve is a manually controlled valve.

[0011] Optionally, in one solution, the drain pipe connected to the water outlet of the steam-water separator is a right-angle elbow structure, and a steam trap is also connected to the horizontal pipeline of the drain pipe.

[0012] Beneficial effects of the utility model:

[0013] The utility model separates the waste oxygen from the liquid sulfur suspended in the waste oxygen by arranging a steam-water separator, thereby effectively reducing the content of the liquid sulfur suspended in the waste oxygen entering the downstream of the waste oxygen pipe, and arranging a drainage pipe to drain the waste oxygen pipe, thereby effectively slowing down the speed of forming sulfur crystals on the inner wall of the waste oxygen pipe, prolonging the time for sulfur crystallization and liquid sulfur to interfere with the diameter of the waste oxygen pipe, thereby slowing down the speed of increasing the pressure in the waste oxygen pipe, effectively prolonging the normal waste oxygen discharge cycle of the waste oxygen pipe, effectively reducing the frequency of disassembly and flushing of the waste oxygen pipe, reducing the labor intensity of flushing, saving time and labor, and effectively preventing fire and explosion accidents caused by increased sulfur crystals.

[0014] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. It is obvious that the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a schematic diagram of the overall structure and connection in one embodiment of the present application;

[0017] Figure 2 It is a schematic diagram of the overall structure and connections in one embodiment of the present application.

[0018] Reference numerals in the figure: 100, autoclave; 101, exhaust pipe; 200, intermediate immersion tank; 300, waste oxygen pipe; 4, steam-water separator; 5, drain pipe; 6, collecting box; 7, first valve; 8, pressure gauge; 9, drainage pipe; 10, drainage trough; 11, second valve; 12, steam trap. DETAILED DESCRIPTION

[0019] The specific implementation methods of the present application are further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application, but are not intended to limit the scope of the present application. Similarly, the following examples are only some embodiments of the present application rather than all embodiments, and all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of this application.

[0020] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0022] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0023] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0024] The waste oxygen discharge method in the prior art has the problem of causing sulfur waste, and sulfur condensation and crystallization are likely to occur in the waste oxygen pipe 1, which makes the diameter of the waste oxygen pipe 1 smaller, which easily leads to the problem of increased pressure in the waste oxygen pipe 1 and thus easily causes fire and explosion accidents. However, in order to control the pressure in the waste oxygen pipe 1, it is necessary to frequently disassemble and flush the sulfur crystals in the waste oxygen pipe 1, which has the problem of high labor intensity, time-consuming and labor-intensive disassembly and flushing.

[0025] In view of the above problems, the present application makes improvements and innovations and proposes the following embodiments.

[0026] In some embodiments, see Figure 1 , provides a device for draining and preventing blockage of waste oxygen from a pressure autoclave, comprising a waste oxygen pipe 300 connected between an exhaust pipe 101 on a pressure autoclave 100 and a mid-immersion operation tank 200 in a zinc leaching process, wherein one end of the waste oxygen pipe 300 close to the exhaust pipe 101 is connected to a steam-water separator 4, an air inlet of the steam-water separator 4 is connected to the waste oxygen pipe 300, a water outlet is connected to a collecting box 6 through a drain pipe 5, a first valve 7 is connected to the exhaust port, and the first valve 7 is connected to the waste oxygen pipe 300; by setting a steam-water separator at one end of the waste oxygen pipe 300 close to the exhaust pipe 101 4, so that the waste oxygen discharged from the autoclave 100 through the exhaust pipe 101 can be separated from the liquid sulfur suspended in the waste oxygen by the separation effect of the steam-water separator 4. Therefore, most of the liquid sulfur suspended in the waste oxygen falls to the bottom of the steam-water separator 4 after passing through the steam-water separator 4 and is discharged from the water outlet. The separated liquid sulfur is discharged to the collection box 6 through the drain pipe 5 for subsequent use. The waste oxygen separated and processed by the steam-water separator 4 and a small amount of liquid sulfur still suspended in the waste oxygen are discharged from the exhaust port and enter the downstream of the waste oxygen pipe 300 through the first valve 7.

[0027] In this way, by setting up the steam-water separator 4 to separate the waste oxygen and the liquid sulfur suspended in the waste oxygen, most of the liquid sulfur suspended in the waste oxygen is effectively removed, thereby effectively reducing the content of liquid sulfur suspended in the waste oxygen entering the downstream of the waste oxygen pipe 300, while reducing the waste of sulfur, and thus effectively reducing the amount of liquid sulfur condensation and sulfur crystallization of the suspended liquid sulfur in the waste oxygen pipe 300, extending the time for sulfur crystallization and liquid sulfur to interfere with the path of the waste oxygen pipe 300, and thus effectively slowing down the speed of increasing the pressure in the waste oxygen pipe 300, which can effectively extend the normal waste oxygen discharge period of the waste oxygen pipe 300 and reduce the frequency of disassembly and flushing of the waste oxygen pipe 300.

[0028] In this embodiment, a pressure gauge 8 is installed on one end of the waste oxygen pipe 300 close to the intermediate immersion operation tank 200, and a drainage pipe 9 is connected to the position between the pressure gauge 8 and the intermediate immersion operation tank 200 on the waste oxygen pipe 300, and the end of the drainage pipe 9 is connected to the drainage groove 10, and a second valve 11 is installed on the drainage pipe 9. Therefore, the pressure in the waste oxygen pipe 300 can be monitored in real time through the barometer 8, and when the pressure in the waste oxygen pipe 300 reaches a predetermined value, the waste oxygen pipe 300 is drained by opening the second valve 11. Specifically, in this embodiment, when the barometer 8 shows that the pressure in the waste oxygen pipe 300 reaches 0.1MPa, the second valve 11 is fully opened for two minutes to drain the waste oxygen pipe 300 and then closed, and the liquid sulfur condensed in the waste oxygen pipe 300 is discharged to the drain groove 10 through the drain pipe 9, thereby effectively slowing down the speed of forming sulfur crystals on the inner wall of the waste oxygen pipe 300, further prolonging the time for sulfur crystallization and liquid sulfur to interfere with the diameter of the waste oxygen pipe 300, slowing down the speed of increasing the pressure in the waste oxygen pipe 300, and further prolonging the normal exhaust period of the waste oxygen pipe 300, which can effectively prevent fire and explosion accidents caused by increased sulfur crystallization.

[0029] Specifically, the drainage cycle of the waste oxygen pipe 300 is determined according to the operating time of the autoclave 100. In the present embodiment, the drainage cycle of the waste oxygen pipe 300 is 4-5 days / time, until the pressure in the waste oxygen pipe 300 rises to close to 0.1MPa in a short period of time after drainage, indicating that the diameter of the waste oxygen pipe 300 is reduced due to excessive sulfur crystallization. At this time, it is necessary to dismantle the waste oxygen pipe 300 between the first valve 7 and the intermediate immersion tank 200 for flushing to remove the sulfur crystals in the pipeline. The disassembly and flushing frequency of the waste oxygen pipe 300 is 35-45 days / time.

[0030] In this embodiment, the end of the drainage pipe 9 is connected to the drainage groove 10, and the drainage groove 10 adopts a trough structure with an open top to be connected to the outside air. When the waste oxygen pipe 300 is drained, the second valve 11 can be opened to release the pressure of the waste oxygen pipe 300, so that the liquid sulfur condensed in the waste oxygen pipe 300 can be discharged from the waste oxygen pipe 300 through the drainage pipe 9 and collected through the drainage groove 10 for subsequent use, thereby further reducing the waste of sulfur.

[0031] In this way, by setting the steam-water separator 4 to separate the waste oxygen and the liquid sulfur suspended in the waste oxygen, the content of liquid sulfur suspended in the waste oxygen entering the downstream of the waste oxygen pipe 300 is effectively reduced, and by setting the drainage pipe 9 to drain the waste oxygen pipe 300 when the pressure in the waste oxygen pipe 300 reaches a predetermined value, under the joint action of the steam-water separator 4 and the drainage pipe 9, the speed of forming sulfur crystals on the inner wall of the waste oxygen pipe 300 by liquid sulfur can be effectively slowed down, and the time for sulfur crystallization and liquid sulfur to interfere with the diameter of the waste oxygen pipe 300 is prolonged, thereby slowing down the speed of increasing the pressure in the waste oxygen pipe 300, and effectively prolonging the normal waste oxygen discharge cycle of the waste oxygen pipe 300. The frequency of disassembly and flushing of the waste oxygen pipe 300 can be extended from 5-7 days / time to 35-45 days / time, effectively reducing the frequency of disassembly and flushing, reducing the labor intensity of flushing, saving time and effort, and effectively preventing fire and explosion accidents caused by increased sulfur crystallization.

[0032] In some embodiments, see Figure 1 The first valve 7 is an automatic control valve. The opening of the first valve 7 controls the pressure in the autoclave 100 to be 1.2 MPa. According to the pressure change in the autoclave 100, the opening of the first valve 7 can be automatically controlled to ensure that the pressure in the autoclave 100 is 1.2 MPa, so as to ensure the stability of the oxygen pressure acid leaching process conditions, thereby ensuring the treatment quality of the high iron zinc sulfide concentrate material and the quality of the discharged material.

[0033] In some embodiments, see Figure 1 , the drainage pipe 9 is installed below the waste oxygen pipe 300. Specifically, the drainage pipe 9 is installed perpendicular to the waste oxygen pipe 300 and below the waste oxygen pipe 300. Thus, the drainage pipe 9 located above the second valve 11 can form a space for temporarily storing the liquid sulfur formed by condensation below the bottom of the waste oxygen pipe 300, thereby effectively slowing down the speed of forming sulfur crystals on the inner wall of the waste oxygen pipe 300, reducing the exhaust space of the waste oxygen pipe 300 occupied by the condensed liquid sulfur, and at the same time, when the waste oxygen pipe 300 is drained, the liquid sulfur formed by condensation and collected at the bottom of the waste oxygen pipe 300 can be discharged as much as possible, thereby ensuring the drainage effect of the waste oxygen pipe 300.

[0034] In some embodiments, see Figure 1The second valve 11 is installed on the drainage pipe 9 at a position close to one end of the waste oxygen pipe 300, and the second valve 11 is a manually controlled valve to shorten the height of the drainage pipe 9 between the second valve 11 and the waste oxygen pipe 300, thereby preventing the liquid sulfur condensed in the waste oxygen pipe 300 from excessively gathering in the drainage pipe 9 during the normal discharge of waste oxygen from the waste oxygen pipe 300, causing more sulfur crystals in the drainage pipe 9 and resulting in a decrease in the drainage effect; by using the second valve 11 of the manually controlled valve, when it is observed that the pressure in the waste oxygen pipe 300 shown by the barometer 8 reaches a predetermined value, the waste oxygen pipe 300 can be drained by manually operating the second valve 11 in time on site, and it is convenient to close the waste oxygen pipe 300 in time for waste oxygen discharge after the pressure value shown by the barometer 8 drops and resets, so as to ensure that the waste oxygen discharged from the autoclave 100 can be discharged into the intermediate leaching operation tank as much as possible as an oxidant to replace manganese powder to enter the intermediate leaching operation process, thereby reducing the consumption of manganese powder in the zinc leaching process and reducing production costs.

[0035] In some embodiments, see Figure 2 The drain pipe 5 connected to the water outlet of the steam-water separator 4 is a right-angle elbow structure, and the horizontal pipeline of the drain pipe 5 is also connected to a steam trap 12, so that the liquid sulfur that falls and gathers at the bottom of the steam-water separator 4 can be quickly discharged from the steam-water separator 4 through the steam trap 12, so as to avoid the separated liquid sulfur from crystallizing at the bottom of the steam-water separator 4 or in the drain pipe 5, thereby ensuring that the steam-water separator 4 can separate the waste oxygen and the liquid sulfur suspended in the waste oxygen in a normal and orderly manner.

[0036] Finally, it should be noted that although the embodiments of the utility model have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the utility model. Ordinary technicians in the field can make changes, modifications, substitutions and variations to the above embodiments within the scope of the utility model, which should all be included in the scope of protection of this application.

Claims

1. A device for discharging waste oxygen from a pressure autoclave to prevent blockage, comprising a waste oxygen pipe (300) connected between an exhaust pipe (101) on a pressure autoclave (100) and a mid-immersion tank (200) in a zinc leaching process, characterized in that: One end of the waste oxygen pipe (300) close to the exhaust pipe (101) is connected to a steam-water separator (4); the air inlet of the steam-water separator (4) is connected to the waste oxygen pipe (300); the water outlet is connected to a collection box (6) via a drain pipe (5); the exhaust port is connected to a first valve (7); and the first valve (7) is connected to the waste oxygen pipe (300); A pressure gauge (8) is installed on one end of the waste oxygen pipe (300) close to the intermediate immersion operation tank (200), and a drainage pipe (9) is connected to a position between the pressure gauge (8) and the intermediate immersion operation tank (200) on the waste oxygen pipe (300), a terminal end of the drainage pipe (9) is connected to a drainage groove (10), and a second valve (11) is installed on the drainage pipe (9).

2. The device for discharging waste oxygen from a pressure autoclave according to claim 1, characterized in that: The first valve (7) is an automatically controlled valve, and the opening of the first valve (7) controls the pressure in the autoclave (100) to be 1.2 MPa.

3. The device for discharging waste oxygen from a pressure autoclave according to claim 1, characterized in that: The drainage pipe (9) is installed below the waste oxygen pipe (300).

4. The device for discharging waste oxygen from a pressure autoclave according to claim 3, characterized in that: The second valve (11) is installed on the drainage pipe (9) at a position close to one end of the waste oxygen pipe (300), and the second valve (11) is a manually controlled valve.

5. The device for discharging waste oxygen from an autoclave according to claim 1 or 4, characterized in that: The drain pipe (5) connected to the water outlet of the steam-water separator (4) is a right-angle elbow structure, and the horizontal pipeline of the drain pipe (5) is also connected to a steam trap (12).

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