CN215310777U

CN215310777U - Device for separating residual iron powder in acidolysis titanium liquid

Info

Publication number: CN215310777U
Application number: CN202120598005.4U
Authority: CN
Inventors: 王洪淼
Original assignee: NANJING TITANIUM DIOXIDE CHEMICAL CO Ltd
Current assignee: NANJING TITANIUM DIOXIDE CHEMICAL CO Ltd
Priority date: 2021-03-24
Filing date: 2021-03-24
Publication date: 2021-12-28
Anticipated expiration: 2031-03-24

Abstract

The utility model discloses a device for separating residual iron powder in acidolysis titanium liquid, which comprises an acidolysis tank, wherein the output end of the acidolysis tank is fixedly connected with a filter, the output end of the filter is fixedly connected with a titanium liquid pump, the output end of the titanium liquid pump is fixedly connected with a swirler, the output end of the swirler is respectively and fixedly connected with a sedimentation tank and a mud tank, and an electromagnetic flow meter is also arranged between the titanium liquid pump and the swirler, so that the device has the beneficial effects that: after the titanium liquid after the separation subsides in the sedimentation tank, thereby it produces the hydrogen bubble to no longer take place iron powder reduction reaction, thereby reduced the thereby potential safety hazard that the explosion takes place of hydrogen enrichment in VOC gas collection system on the one hand, simultaneously, can avoid attaching to insoluble particulate matter because of the bubble come-up, lead to settling effect not good in the sedimentation tank, the solid content risees, and the condition that titanium liquid filterability descends takes place.

Description

Device for separating residual iron powder in acidolysis titanium liquid

Technical Field

The utility model relates to the technical field of titanium dioxide production by a sulfuric acid method, in particular to a device for separating residual iron powder in acidolysis titanium liquid.

Background

In the production process of titanium dioxide by a sulfuric acid method, an important operation unit of an acidolysis process is to add iron powder into an acidolysis tank to perform reduction reaction so as to reduce ferric iron in a titanium solution into ferrous iron. Because the sources and the qualities of the iron powder are different, the reduction reaction rates and the completeness of different iron powders are greatly different, especially some iron powders with thicker fineness still cannot be completely reacted within the time period of 3-4 hours of titanium solution leaching in an acidolysis tank, the rest 2% -5% of the iron powder enters a sedimentation tank along with the acidolysis titanium solution through a delivery pump, slurry and other insoluble impurities in the acidolysis titanium solution are agglomerated under the action of a flocculating agent and then settle, and impurities with larger specific gravity, such as slag, iron powder and the like, quickly settle to the bottom of the sedimentation tank under the action of gravity. The early stage of titanium liquid sedimentation is about 0-5 hours, the large particle impurities agglomerated are high in gravitational potential energy and high in sedimentation speed, then the remaining small solid particles gradually and slowly settle along with the action of gravity, in the process, the solid-liquid layered interface in the sedimentary titanium liquid is gradually obvious, meanwhile, the iron powder deposited at the bottom of the pool continuously reacts with sulfuric acid in the titanium liquid to generate hydrogen bubbles, the fine impurity particles attached to the mud layer at the bottom of the pool are captured by the bubbles and float up along with the bubbles, and most of the particles are suspended on the height surface of about 1m above the original solid-liquid layered layer under the interaction of buoyancy and self gravity. The consequence that so causes is exactly on the one hand, the continuous production of hydrogen bubble causes under the condition of VOC fan jump electricity, and hydrogen is enriched in the anti-hanging film in sedimentation tank upper portion, the risk of hydrogen explosion probably takes place, and on the other hand, at the in-process of titanium liquid feeding, because partial tiny particle suspends in the titanium liquid, the unaided eye can't judge to get into the production line simultaneously with clear titanium liquid, cause the ferrous quality decline of follow-up production line production, the sheet frame filtration performance gliding, seriously restrict the production progress.

In the existing acidolysis process, the components in the titanium liquid are complex, the acidity is high, the titanium liquid has certain viscosity, and the grade of the iron powder is greatly changed, so that the redundant iron powder cannot be adjusted, optimized and separated through the existing process operation.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a device for separating residual iron powder in acidolysis titanium liquid, which aims to solve the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a device of remaining iron powder in separation acidolysis titanium liquid, includes the acidolysis jar, the output fixed connection filter of acidolysis jar, the output fixed connection titanium liquid pump of filter, the output fixed connection swirler of titanium liquid pump, the output of swirler is fixed connection sedimentation tank and mud slurry tank respectively, still install electromagnetic flowmeter between titanium liquid pump and the swirler.

As a further scheme of the utility model: the cyclone is composed of three parts, wherein the uppermost layer is of a cylindrical structure, the middle layer is of a conical structure, and the bottommost layer is a sand settling nozzle.

As a further scheme of the utility model: and the output ends of the acidolysis tank, the filter and the titanium liquid pump are provided with electromagnetic valves.

As a further scheme of the utility model: the connecting pipe of the sedimentation tank is connected with the top overflow port of the cyclone.

As a further scheme of the utility model: the connecting pipe with the mud tank is connected with an opening at the bottom of the cyclone.

Compared with the prior art, the utility model has the beneficial effects that: according to the device for separating residual iron powder in the acidolysis titanium liquid, provided by the utility model, after the separated titanium liquid is settled in the sedimentation tank, iron powder reduction reaction is not carried out any more so as to generate hydrogen bubbles, so that the potential safety hazard of explosion caused by enrichment of hydrogen in a VOC gas collection system is reduced, and meanwhile, the situations that the sedimentation effect in the sedimentation tank is poor, the solid content is increased and the filtration performance of the titanium liquid is reduced due to the fact that insoluble particles are attached to the bubbles due to floating upward can be avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a block diagram of the present invention;

FIG. 2 is a front view of the swirler structure of the present invention;

FIG. 3 is a top view of a swirler structure in accordance with the present invention.

In the figure: 1 acidolysis tank, 2 filters, 3 titanium liquid pumps, 4 cyclones, 5 sedimentation tanks, 6 mud tanks, 7 electromagnetic flowmeters.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, in an embodiment of the present invention, a device for separating residual iron powder from an acidolysis titanium solution includes an acidolysis tank 1, an output end of the acidolysis tank 1 is fixedly connected to a filter 2, an output end of the filter 2 is fixedly connected to a titanium liquid pump 3, an output end of the titanium liquid pump 3 is fixedly connected to a cyclone 4, an output end of the cyclone 4 is respectively and fixedly connected to a sedimentation tank 5 and a slurry tank 6, an electromagnetic flow meter 7 is further installed between the titanium liquid pump 3 and the cyclone 4, the cyclone 4 is composed of three parts, wherein an uppermost layer is a cylindrical structure, a middle layer is a conical structure, a bottommost layer is a sand deposition nozzle, a connecting pipe of the sedimentation tank 5 is connected to a top overflow port of the cyclone 4, and a connecting pipe of the slurry tank 6 is connected to an opening at the bottom of the cyclone 4.

The titanium acidolysis solution after leaching and reduction in the acidolysis tank passes through the filter 2, enters the titanium liquid pump 3, enters the hydrocyclone 4 arranged at a high position through a pump, flows into the sedimentation tank 5 through the overflow pipe, and flows into the slurry tank 6 through the underflow port.

Example (b):

the working principle of the set of cyclones is shown in figure 2: the separation of the titanium acidolysis solution suspension under high-speed rotation is realized by utilizing a strong centrifugal force. The titanium acidolysis liquid is pushed into the inlet of the cyclone into the interior at the speed of about 2m/s by using the pressure pumped from the outside, and the suspension moves along the tangential direction of the cyclone, so that the liquid is promoted to rotate along the cylinder wall, and the motion is generally called as outer cyclone. The particles in the outer cyclone flow are acted by centrifugal force, the particles mainly contain mud, slag, iron powder and other components, the density of the mud is relatively low, and the density of the slag and the iron powder is far greater than that of the titanium liquid, so that the centrifugal force is increased, once the centrifugal force is greater than the liquid resistance generated by movement, the particles can move towards the wall of the cyclone flow to be separated from surrounding liquid, and the slag and the iron powder which reach the wall of the cyclone flow are pushed by the liquid above the cyclone flow and move downwards along the wall of the cyclone flow. The suspension liquid with higher thickening degree is collected near the underflow port, discharged from the underflow port and recycled in a mud pit. The separated titanium liquid rotates downwards to continue moving, and after entering the conical section, the inner diameter of the hydrocyclone is gradually reduced, so that the rotation speed of the titanium liquid is increased. Because the pressure distribution of the titanium liquid along the radial direction is uneven when the titanium liquid generates the vortex, the pressure distribution is smaller when the titanium liquid is closer to the axis and approaches zero when the titanium liquid reaches the axis, the titanium liquid becomes a low-pressure area and even a vacuum area, and the liquid tends to move along the axis. Meanwhile, the bottom flow port of the hydrocyclone separator is greatly reduced, liquid cannot be rapidly discharged from the bottom flow port, and the overflow port in the center of the top cover of the hydrocyclone chamber is positioned in a low-pressure area to enable a part of liquid to move towards the overflow port, so that upward rotary motion is formed, and the liquid is discharged from the overflow port and enters a sedimentation tank for flocculation and sedimentation.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a device of remaining iron powder in separation acidolysis titanium liquid, includes acidolysis jar (1), its characterized in that: the utility model discloses a titanium acidolysis jar, including the output fixed connection filter (2) of acidolysis jar (1), the output fixed connection titanium liquid pump (3) of filter (2), the output fixed connection swirler (4) of titanium liquid pump (3), the output of swirler (4) is fixed connection sedimentation tank (5) and mud tank (6) respectively, still install electromagnetic flowmeter (7) between titanium liquid pump (3) and swirler (4).

2. The device for separating residual iron powder in the acidolysis titanium solution as claimed in claim 1, wherein: the cyclone (4) is specifically a hydrocyclone, the cyclone (4) is composed of three parts, wherein the uppermost layer is of a cylindrical structure, the middle layer is of a conical structure, and the bottommost layer is a sand settling nozzle.

3. The device for separating residual iron powder in the acidolysis titanium solution as claimed in claim 1, wherein: and the output ends of the acidolysis tank (1), the filter (2) and the titanium liquid pump (3) are all provided with electromagnetic valves.

4. The device for separating residual iron powder in the acidolysis titanium solution as claimed in claim 1, wherein: the connecting pipe of the sedimentation tank (5) is connected with the top overflow port of the cyclone (4).

5. The device for separating residual iron powder in the acidolysis titanium solution as claimed in claim 1, wherein: the connecting pipe with the mud tank (6) is connected with an opening at the bottom of the cyclone (4).