CN211169904U - TiO used in titanium dioxide production wastewater2Recovery system - Google Patents
TiO used in titanium dioxide production wastewater2Recovery system Download PDFInfo
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- CN211169904U CN211169904U CN201921868417.4U CN201921868417U CN211169904U CN 211169904 U CN211169904 U CN 211169904U CN 201921868417 U CN201921868417 U CN 201921868417U CN 211169904 U CN211169904 U CN 211169904U
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Abstract
TiO used in titanium dioxide production wastewater2The recovery system comprises a buffer tank, a microporous filter, a clear liquid tank, a thick slurry tank and a regeneration liquid tank; the feed inlet of the buffer tank is connected with a titanium dioxide production wastewater pipeline, the discharge outlet of the buffer tank is connected to the microporous filter through a pipeline, a feed pump is arranged on the pipeline between the buffer tank and the microporous filter, and a buffer tank stirring piece is arranged in the buffer tank; the bottom of the microporous filter is also provided with a slag discharge port which is connected to the thick slurry tank through a pipeline; the microporous filter is also provided with a pipeline for conveying process water and a pipeline for conveying the process waterA conduit for compressed air. The utility model adopts the microporous filter device, does not need to add extra flocculating agent, and solves the problems of pipeline blockage and equipment structure damage; meanwhile, the system has high degree of automatic control, does not have the problem of unorganized discharge, and has high quality of recovered products.
Description
Technical Field
The utility model belongs to titanium white powder production facility field, concretely relates to a TiO for among titanium white powder production wastewater2And (5) recovering the system.
Background
Titanium dioxide, commonly known as titanium dioxide, is a white inorganic pigment. Titanium dioxide has strong adhesion and is not easy to change chemically, and is widely applied to the industrial fields of paint, plastics, paper making, printing ink, chemical fiber, rubber, cosmetics and the like.
In the process of industrially producing titanium dioxide, a large amount of fine TiO-containing titanium dioxide is produced2Granular waste water (such as waste acid water, first washing water, second washing water, third washing water, etc.) requires TiO in the waste water from the aspects of cost and environmental protection2The particles are recovered and the TiO2The particles are very fine, the particle size of a single hydrated titanium dioxide particle is only 1.2-1.6 microns, the sedimentation is difficult in the industrial production process, and the recovery efficiency by adopting a sedimentation method is very low. At present, the recovery mode adopted in some processes is that after flocculating by adding a flocculating agent, the flocculating agent is settled and recovered in a settling tank, a CN filter and an inclined plate filter, but the devices can not efficiently recover the fine TiO2Particles, and the above devices are all open devices, so that the problems of inorganized emission of acid gas and air pollution exist; furthermore, the open equipment can cause TiO during the operation process2Ferrous ions adsorbed by the particles are oxidized into high-iron ions, and finally, the iron content of the product is increased, so that the quality of the product is influenced.
In addition, for the recovery process of adding the flocculating agent, the problems of pipeline blockage caused by the flocculating agent and equipment structure damage caused by deposition in the equipment are easy to occur, and TiO is easy to cause due to the addition of the flocculating agent2The particles flocculate to form clusters, and the TiO in the flocculation pattern2Iron ions adsorbed by the particles cannot be thoroughly washed, so that the iron content in the recovered titanium dioxide is increased, and the product quality is influenced.
Therefore, based on the problems in the prior art, the present application is directed to TiO compounds in the prior art2The recovery device is further researched and improved, so that the recovery is more efficient, and the product quality is higher.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model provides a TiO used in titanium dioxide production wastewater2The recovery system does not need to use an additional flocculating agent, has high degree of automatic control and strong closure, and can not cause the problem of unorganized discharge of acid gas.
In order to solve the above technical problem, the present invention solves the above technical problems.
TiO used in titanium dioxide production wastewater2The recovery system comprises a buffer tank, a microporous filter, a clear liquid tank, a thick slurry tank and a regeneration liquid tank; the feed inlet of the buffer tank is connected with a titanium dioxide production wastewater pipeline, the discharge outlet of the buffer tank is connected to the microporous filter through a pipeline, a feed pump is arranged on the pipeline between the buffer tank and the microporous filter, and a buffer tank stirring piece is arranged in the buffer tank; the bottom of the microporous filter is also provided with a slag discharge port which is connected to the thick slurry tank through a pipeline; the microporous filter is also provided with a pipeline for conveying process water and a pipeline for conveying compressed air; the clear liquid groove is provided with a feed inlet for receiving materials from the microporous filter, and is also provided with a discharge outlet for discharging waste materials; the thick slurry tank is provided with a feed inlet which is used for receiving materials from a slag discharge port, and the thick slurry tank is also provided with a discharge port which is connected to a thick slurry pump through a pipeline; a thick paddle tank stirring piece is arranged in the thick paddle tank; the regeneration liquid tank is provided with at least two feed inlets, one feed inlet is used for receiving materials from the microporous filter, the other feed inlet is used for receiving external materials, the regeneration liquid tank is also provided with a discharge outlet, the discharge outlet is connected to the microporous filter through a pipeline, and a regeneration liquid pump is arranged on the pipeline; and a regeneration liquid stirring piece is arranged in the regeneration liquid tank.
TiO in the present application2The recycling system comprises a buffer tank, a recycling system and a recycling system, wherein the buffer tank is used for storing titanium dioxide production wastewater, and a stirring piece of the buffer tank is used for stirring the wastewater to keep a stirring state; under the action of the feed pump, the titanium dioxide production wastewater in the buffer tank is conveyed into a microporous filter through a pipeline, the microporous filter is a closed container, and the wastewater is filtered in the microporous filter, so that the oxidation of ferrous ions and the release of acid gas are avoided. After the process is finished, the clear liquid is conveyed into a clear liquid tank through a pipeline for further treatment, and the recovered TiO is2The thick paddle pump is arranged in the thick paddle, the thick paddle enters the thick paddle tank through the pipeline after passing through the slag discharge port, the thick paddle tank stirring piece is used for stirring the thick paddle in the thick paddle tank to avoid condensation, and the thick paddle is conveyed to a production workshop through the thick paddle pump to be processed in the next step or recycled. Meanwhile, a regeneration liquid tank is arranged in the recovery system, when the outlet flow of the microporous filter is smaller than the design flow, the regeneration liquid pump is started to automatically circulate, the circulation process adopts time control, the regeneration program is finished, and the system is recovered to the initial state of the system.
In a preferred embodiment, a first automatic control valve is arranged on a pipeline flowing from the buffer tank to the microporous filter; a second automatic control valve is arranged on a pipeline which is connected with the microporous filter and used for conveying compressed air; a third automatic control valve is arranged on a pipeline which is connected with the microporous filter and used for conveying process water; a fourth automatic control valve is arranged on a pipeline flowing from the microporous filter to the regeneration liquid tank; a fifth automatic control valve is arranged on a pipeline flowing from the discharge hole of the regeneration liquid tank to the microporous filter; a sixth automatic control valve is arranged on a pipeline flowing from the microporous filter to the clear liquid tank; and a seventh automatic control valve is arranged on a pipeline flowing from the slag discharging port to the thick slurry groove.
In a preferred embodiment, the first automatic control valve, the second automatic control valve, the third automatic control valve, the fourth automatic control valve, the fifth automatic control valve, the sixth automatic control valve and the seventh automatic control valve are connected to a P L C system, the automatic control valves are controlled by the P L C system, each program can run automatically, and the operation process is fully automatic without manual intervention.
In a preferred embodiment, the microporous filter is provided with a pressure interlocking device, the pressure interlocking device is connected with the feeding pump, and whether to start the feeding pump can be judged according to the pressure in the microporous filter.
In a preferred embodiment, a flow display device is arranged on the pipeline flowing from the microporous filter to the clear liquid tank and is used for observing and acquiring flow information in the pipeline.
Compared with the prior art, the utility model discloses following beneficial effect has: provides TiO used in titanium dioxide production wastewater2The recovery system adopts a microporous filter device, so that no flocculating agent needs to be additionally added in the process of treating the titanium dioxide production wastewater, and the problems of pipeline blockage and equipment structure damage are solved; meanwhile, the system has high degree of automatic control, fully-closed operation in the operation process, no problem of unorganized discharge and high quality of recovered products.
Drawings
FIG. 1 shows TiO in the present application2The equipment and pipeline of the recovery system are schematically connected.
Fig. 2 is a partially enlarged view of the area a in fig. 1.
Fig. 3 is a partially enlarged view of the region B in fig. 1.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The embodiments described below by referring to the drawings are exemplary only for explaining the present invention and are not construed as limiting the present invention, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.
In the description of the present invention, it is to be understood that the term: the center, vertically, transversely, length, width, thickness, upper and lower, preceding, back, left and right, vertical, level, top, end, inside and outside, clockwise, anticlockwise etc. indicate position or positional relationship for based on the position or positional relationship that the drawing shows, just for the convenience of description the utility model discloses and simplified description, consequently can not be understood as the restriction of the utility model. Furthermore, the terms: first, second, etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features shown. In the description of the present invention, unless explicitly stated or limited otherwise, the terms: mounting, connecting, etc. are to be understood broadly and those skilled in the art will understand the specific meaning of the terms in this application as they pertain to the particular situation.
Referring to fig. 1 to 3, the application relates to a TiO in wastewater from titanium dioxide production2The recovery system comprises a buffer tank 1, a microporous filter 4, a clear liquid tank 6, a thick slurry tank 15 and a regeneration liquid tank 20; the feed inlet of the buffer tank 1 is connected with a titanium dioxide production wastewater pipeline, the discharge outlet of the buffer tank 1 is connected to a microporous filter 4 through a pipeline, a feed pump 3 is arranged on the pipeline between the buffer tank 1 and the microporous filter 4, and a buffer tank stirring piece 2 is arranged in the buffer tank 1 for homogenizing and stirring materials; a discharge port is formed in the microporous filter 4 and connected to the clear liquid tank 6 through a pipeline, and a slag discharge port is further formed in the bottom of the microporous filter 4 and connected to the thick slurry tank 15 through a pipeline; the microporous filter 4 is also provided with a pipeline for conveying process water and a pipeline for conveying compressed air; the clear liquid groove 6 is provided with a feed inlet for receiving the material from the microporous filter 4, and the clear liquid groove 6 is also provided with a discharge outlet for discharging the waste material; the thick slurry tank 15 is provided with a feed inlet for receiving materials from a slag discharge port, and the thick slurry tank 15 is also provided with a discharge port which is connected to a thick slurry pump 17 through a pipeline; a thick paddle tank stirring piece 16 is arranged in the thick paddle tank 15 and is used for homogenizing and stirring the materials; the regeneration liquid tank 20 is provided with at least two feed inlets, one feed inlet is used for receiving materials from the microporous filter 4, the other feed inlet is used for receiving external materials, the regeneration liquid tank 20 is also provided with a discharge outlet, the discharge outlet is connected to the microporous filter 4 through a pipeline, and a regeneration liquid pump 19 is arranged on the pipeline; a regeneration liquid stirring piece 21 is arranged in the regeneration liquid tank 20.
In addition, in the application, a first automatic control valve 9 is arranged on a pipeline which flows from the buffer tank 1 to the microporous filter 4, a second automatic control valve 7 is arranged on a pipeline which is connected with the microporous filter 4 and is used for conveying compressed air, a third automatic control valve 12 is arranged on a pipeline which is connected with the microporous filter 4 and is used for conveying process water, a fourth automatic control valve 11 is arranged on a pipeline which flows from the microporous filter 4 to the regeneration liquid tank 20, a fifth automatic control valve 10 is arranged on a pipeline which flows from a discharge port of the regeneration liquid tank 20 to the microporous filter 4, a sixth automatic control valve 8 is arranged on a pipeline which flows from the microporous filter 4 to the clear liquid tank 6, a seventh automatic control valve 13 is arranged on a pipeline which flows from a slag discharge port to the thickening slurry tank 15, the first automatic control valve 9, the second automatic control valve 7, the third automatic control valve 12, the fourth automatic control valve 11, the fifth automatic control valve 10, the sixth automatic control valve 8 and the seventh automatic control valve 13 are connected to a P L C system, and the P L C system is adopted for controlling the automatic operation of each program, so that the automatic operation can be realized without manual intervention and the manual.
In this application, be equipped with pressure interlocking device 5 on the microporous filter 4, pressure interlocking device 5 is connected with charge pump 3, can judge whether start charge pump 3 according to the pressure size in the microporous filter 4. The pipeline flowing from the microporous filter 4 to the clear liquid tank 6 is provided with a flow display device 18 for observing and acquiring flow information in the pipeline, feeding back the filtering performance of the microporous filter in time and judging whether to regenerate. In the application, the side surface of the buffer tank 1 is provided with an overflow port, redundant wastewater overflows to a sewage trench from the overflow port,
in addition, in order to make the cell body have the liquid level display function, in this application, all be equipped with liquid level display device on buffer tank 1, clear solution groove 6, the regeneration cistern 20, can show the liquid level in the cell body, the last variable frequency control device that is furnished with of charge pump 3, the charge pump adopts variable frequency control, the frequency is interlocked with the pressure interlocking device at millipore filter filtration top, guaranteed that the constant voltage filters, compressed air is provided by the compressed air storage tank, simultaneously the system in this application still includes P L C system, this P L C system can be conventional equipment control system among the prior art.
TiO in the present application2The recovery system works as follows.
The initial state of the system is as follows: in the initial state of the system, the second automatic control valve 7 is opened, the sixth automatic control valve 8 is opened, and the first automatic control valve 9, the third automatic control valve 12, the fourth automatic control valve 11, the fifth automatic control valve 10 and the seventh automatic control valve 13 are all in a closed state.
And (3) a feeding filtering program, namely clicking a P L C system starting program, automatically starting the feeding pump 3 by the system, performing variable frequency interlocking on a pressure interlocking device 5 and a motor of the feeding pump 3, communicating a liquid outlet of a microporous filter 4 with an inlet of a clear liquid tank 6, communicating a liquid outlet of the clear liquid tank 6 with a sewage pipe network, and automatically starting the feeding filtering program by the system after clicking starting.
Slag discharge and flushing procedures: when the pressure interlocking device 5 at the top of the microporous filter 4 displays that the pressure reaches the slag discharge pressure, the back flushing port of the microporous filter 4 is provided with a second automatic control valve 7, the bottom of the microporous filter 4 is provided with a slag discharge valve 13, the system closes the first automatic control valve 9, opens the second automatic control valve 7, compressed air from a compressed air storage tank 14 enters the microporous filter 4 to press out clear liquid in the microporous filter 4, after the system finishes timing, the system closes the sixth automatic control valve 8, the system opens the seventh automatic control valve 13 to carry out slag discharge, the second automatic control valve 7 is closed after timing is finished, the system opens the third automatic control valve 12 of washing water to carry out re-washing and slag discharge, the system closes the second automatic control valve 7 after slag discharge is finished, the seventh automatic control valve 13 is closed, the third automatic control valve 12 is closed, the sixth automatic control valve 8 is opened, the first automatic control valve 9 is opened, and the system automatically carries out re-feeding and filtering operation.
In the deslagging process, the bottom thick slurry enters the thick slurry tank 15, the system automatically starts the thick slurry tank stirring piece 16, the thick slurry tank 15 is provided with a liquid level controller, the liquid level controller is linked with the thick slurry pump 17 to automatically pump the thick slurry in the thick slurry tank 15 back to a production workshop, deslagging is finished, the seventh automatic control valve 13 is closed, the system delays to close the thick slurry tank stirring piece 16, and the thick slurry pump 17 automatically stops according to liquid level feedback of the thick slurry tank 15.
Regeneration procedure of regeneration liquid: when the flow displayed by the flow display device 18 at the outlet of the microporous filter 4 is smaller than the designed flow, the system starts regeneration, the system repeats the slag discharging and flushing program after the regeneration program is started, after the slag discharging and flushing program is finished, the system closes the sixth automatic control valve 8, closes the first automatic control valve 9, opens the fifth automatic control valve 10, opens the fourth automatic control valve 11, starts the regeneration liquid pump 19, starts the regeneration liquid stirring piece 21 in the regeneration liquid tank 20, automatically pumps the circulation, adopts time control in the circulation process, finishes the regeneration program, returns the system to the initial state, clicks the feeding and filtering program, and performs the feeding and filtering operation.
In the application, the microporous filter is adopted to replace the existing CN filter (inclined plate settler and settling tank), and the fine TiO is added2The particles are recycled, the microporous filter is of a closed structure, the pollution of acid gas is avoided, the opening of a filter element of the microporous filter is only 1 micron, and TiO can be effectively intercepted2And (3) granules.
The recovery system realizes solid-liquid separation through fine gaps of filter elements of the micropore device, and is operated in a closed system, so that the continuous, stable, environment-friendly and efficient recovery process is realized, the problems of poor recovery effect and low efficiency due to the fact that only simple gravity is utilized in the current CN filter, inclined plate filter and settling tank are solved, meanwhile, the process realizes automatic control, the frequency of filter pressing pressure is interlocked with the frequency of a feeding pump, constant-pressure filtration is realized, and the problems that the recovery efficiency is reduced and the recovery is incomplete due to the fact that the feeding concentration fluctuates or the solid content in feeding wastewater fluctuates do not exist. Because the equipment is in the airtight operation in the recovery process of the process, and a flocculating agent is not added, the problem of pipeline and equipment blockage is not caused, and the problem that the iron content of the product is improved and the product quality is influenced due to the fact that the recovered thick pulp returns to a system is avoided.
The protection scope of the present invention includes but is not limited to the above embodiments, the protection scope of the present invention is subject to the claims, and any replacement, deformation, and improvement that can be easily conceived by those skilled in the art made by the present technology all fall into the protection scope of the present invention.
Claims (5)
1. TiO used in titanium dioxide production wastewater2The recovery system is characterized by comprising a buffer tank (1), a microporous filter (4), a clear liquid tank (6), a thick slurry tank (15) and a regeneration tankA liquid tank (20);
the feeding port of the buffer tank (1) is connected with a titanium dioxide production wastewater pipeline, the discharging port of the buffer tank (1) is connected to the microporous filter (4) through a pipeline, a feeding pump (3) is arranged on the pipeline between the buffer tank (1) and the microporous filter (4), and a buffer tank stirring piece (2) is arranged in the buffer tank (1);
a discharge port is formed in the microporous filter (4), the discharge port is connected to the clear liquid tank (6) through a pipeline, a slag discharge port is further formed in the bottom of the microporous filter (4), and the slag discharge port is connected to the thick slurry tank (15) through a pipeline; the microporous filter (4) is also provided with a pipeline for conveying process water and a pipeline for conveying compressed air;
the clear liquid groove (6) is provided with a feed inlet for receiving materials from the microporous filter (4), and the clear liquid groove (6) is also provided with a discharge outlet for discharging waste materials;
the thickening slurry tank (15) is provided with a feed inlet which is used for receiving materials from a slag discharge port, and the thickening slurry tank (15) is also provided with a discharge port which is connected to a thickening slurry pump (17) through a pipeline; a thick paddle tank stirring piece (16) is arranged in the thick paddle tank (15);
the regeneration liquid tank (20) is provided with at least two feed inlets, one feed inlet is used for receiving materials from the microporous filter (4), the other feed inlet is used for receiving external materials, the regeneration liquid tank (20) is also provided with a discharge outlet, the discharge outlet is connected to the microporous filter (4) through a pipeline, and a regeneration liquid pump (19) is arranged on the pipeline; and a regeneration liquid stirring piece (21) is arranged in the regeneration liquid tank (20).
2. The TiO for titanium dioxide production wastewater according to claim 12The recovery system is characterized in that a first automatic control valve (9) is arranged on a pipeline flowing from the buffer tank (1) to the microporous filter (4); a second automatic control valve (7) is arranged on a pipeline which is connected with the microporous filter (4) and used for conveying compressed air; connected to a microporous filter (4)A third automatic control valve (12) is arranged on the pipeline for conveying the process water; a fourth automatic control valve (11) is arranged on a pipeline flowing from the microporous filter (4) to the regeneration liquid tank (20); a fifth automatic control valve (10) is arranged on a pipeline flowing from the discharge hole of the regeneration liquid tank (20) to the microporous filter (4); a sixth automatic control valve (8) is arranged on a pipeline flowing from the microporous filter (4) to the clear liquid tank (6); a seventh automatic control valve (13) is arranged on a pipeline flowing from the slag discharge port to the thick slurry groove (15).
3. The TiO for titanium dioxide production wastewater according to claim 22The recycling system is characterized in that the first automatic control valve (9), the second automatic control valve (7), the third automatic control valve (12), the fourth automatic control valve (11), the fifth automatic control valve (10), the sixth automatic control valve (8) and the seventh automatic control valve (13) are connected to a P L C system.
4. The TiO for titanium dioxide production wastewater according to claim 12The recovery system is characterized in that a pressure interlocking device (5) is arranged on the microporous filter (4), and the pressure interlocking device (5) is connected with the feeding pump (3).
5. The TiO for titanium dioxide production wastewater according to claim 12The recovery system is characterized in that a flow display device (18) is arranged on a pipeline flowing from the microporous filter (4) to the clear liquid tank (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921868417.4U CN211169904U (en) | 2019-11-01 | 2019-11-01 | TiO used in titanium dioxide production wastewater2Recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921868417.4U CN211169904U (en) | 2019-11-01 | 2019-11-01 | TiO used in titanium dioxide production wastewater2Recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211169904U true CN211169904U (en) | 2020-08-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921868417.4U Active CN211169904U (en) | 2019-11-01 | 2019-11-01 | TiO used in titanium dioxide production wastewater2Recovery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211169904U (en) |
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2019
- 2019-11-01 CN CN201921868417.4U patent/CN211169904U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A TiO2recovery system for titanium dioxide production wastewater Effective date of registration: 20201225 Granted publication date: 20200804 Pledgee: Bank of Communications Co.,Ltd. Ningbo Branch Pledgor: NINGBO XINFU TITANIUM DIOXIDE Co.,Ltd. Registration number: Y2020330001284 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |