CN213699095U - Acid wastewater recycling device in titanium dioxide production water washing process - Google Patents
Acid wastewater recycling device in titanium dioxide production water washing process Download PDFInfo
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- CN213699095U CN213699095U CN202022398093.1U CN202022398093U CN213699095U CN 213699095 U CN213699095 U CN 213699095U CN 202022398093 U CN202022398093 U CN 202022398093U CN 213699095 U CN213699095 U CN 213699095U
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Abstract
The utility model discloses an acid wastewater recycling device in the titanium dioxide production water washing process, relating to the titanium dioxide production process by a sulfuric acid method. The device comprises a metatitanic acid leaf filter, a waste acid water discharge pipe and a waste acid water discharge cyclone separator; the waste acid water discharge cyclone separator is connected with a concentrated waste acid liquid seal tank, a dilute waste acid liquid seal tank and a waste water external liquid seal tank. The utility model discloses an utilize the temperature of waste water to make acidolysis leaching process efficiency promote, realized the purpose of water resource circulation high efficiency utilization and heat cyclic utilization.
Description
Technical Field
The utility model relates to a titanium dioxide production process by a sulfuric acid method, in particular to an acid wastewater recycling device in a titanium dioxide production washing process.
Background
In the production process of titanium dioxide by a sulfuric acid method, water washing comprises three processes of sucking tablets, washing and unloading tablets. The suction disc is that the solid phase part (mainly comprising metatitanic acid) of metatitanic acid suspension in the suction disc pool is uniformly adsorbed on the filter cloth of the blade in the suction disc pool under the assistance of vacuum to form a filter cake layer with a certain thickness, and the liquid phase part (mainly concentrated waste acid, commonly called as suction disc acid) enters a high-concentration waste acid recovery system after penetrating through the filter cake layer and the filter cloth of the blade to achieve the aim of solid-liquid separation; the washing is that the leaves after sucking the slice are hung in a washing tank, soluble metal salts, colloid impurities and the like in the filter cake are removed to the maximum extent by process water to meet the purification requirement, and the generated acid wastewater with medium and low concentration (commonly called washing acid) respectively enters a medium and low concentration recovery system; and unloading the sheets, namely unloading and pulping the filter cakes which are washed to be qualified, and entering the next working procedure.
During the washing process, the tablet acid is comprehensively utilized due to the high concentration (20-24%). However, during the washing process, a large amount of washing acid with medium concentration (10-15%) and low concentration (0.5-2%) is generated, and the product is about 20m per ton3The specific ratio of the low-concentration washing acid (commonly called waste water) is more than 80 percent. Along with the technical progress, the medium-concentration washing acid is primarily and comprehensively utilized at present, but the low-concentration acidic wastewater has high comprehensive utilization difficulty due to low concentration and large generation amount.
Therefore, it is necessary to develop a device for recycling acidic wastewater in the titanium white production water washing process.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the defects of the prior art and providing the device for recycling the acid wastewater in the titanium white production washing process.
In order to realize the purpose, the technical scheme of the utility model is that: acid waste water recycling device in titanium dioxide production washing process, its characterized in that: the device comprises a metatitanic acid leaf filter for performing solid-liquid separation on metatitanic acid slurry, a waste acid water discharge pipe connected with the metatitanic acid leaf filter, and a waste acid water discharge cyclone separator connected with the waste acid water discharge pipe; the waste acid water discharging cyclone separator is connected with the concentrated waste acid liquid seal tank through a concentrated waste acid collecting valve, connected with the dilute waste acid liquid seal tank through a dilute waste acid collecting valve and connected with the waste water outer liquid seal tank through a waste water outer discharge valve.
In the technical scheme, the device also comprises a washing water tank; when the dilute waste acid collecting valve is opened, the metatitanic acid leaf filter is put into a washing water tank.
In the technical scheme, the waste acid water discharging cyclone separator is connected with a waste water recovery liquid seal tank through a waste water recovery valve; the recovered wastewater liquid seal tank is connected with an acidolysis leaching water storage tank through a recovered wastewater pump.
Compared with the prior art, the utility model has the advantages of it is following:
1) the utility model discloses not only reduce washing waste water discharge, recycle the acidolysis leaching process through the partial waste water that produces the washing simultaneously, make the fresh process water consumption of acidolysis descend.
2) The utility model discloses an utilize the temperature of waste water to make acidolysis leaching process efficiency promote, realized the purpose of water resource circulation high efficiency utilization and heat cyclic utilization.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings, which are not intended to limit the present invention, but are merely exemplary. While the advantages of the invention will be apparent and readily appreciated by the description.
With reference to the accompanying drawings: acid waste water recycling device in titanium dioxide production washing process, its characterized in that: comprises a metatitanic acid leaf filter 1 for performing solid-liquid separation on metatitanic acid slurry, a waste acid water discharge pipe 2 connected with the metatitanic acid leaf filter 1, and a waste acid water discharge cyclone separator 3 connected with the waste acid water discharge pipe 2; the waste acid water discharging cyclone separator 3 is connected with a concentrated waste acid liquid seal groove 311 through a concentrated waste acid collecting valve 31, connected with a dilute waste acid liquid seal groove 321 through a dilute waste acid collecting valve 32, and connected with a waste water outer liquid seal groove 331 through a waste water outer discharge valve 33.
The washing device also comprises a washing water tank 4; when the dilute waste acid collecting valve 32 is opened, the metatitanic acid leaf filter 1 is placed in the washing water tank 4.
The waste acid water discharging cyclone separator 3 is connected with a waste water recovery liquid seal tank 341 through a waste water recovery valve 34; the recovered wastewater liquid seal tank 341 is connected with the acidolysis leaching water storage tank 5 through a recovered wastewater pump 342.
In actual use, the process flow of the utility model is as follows: when absorbing the metatitanic acid, the metatitanic acid slurry enters an absorbing tank, the metatitanic acid slurry is subjected to a solid-liquid separation process through a metatitanic acid leaf filter 1 under a vacuum condition, and metatitanic acid is absorbed on a filter plate of the leaf filter to form a filter cake;
opening a concentrated waste acid collecting valve 31, and allowing high-concentration filtrate to pass through a metatitanic acid leaf filter 1 and sequentially pass through a waste acid water discharging pipe 2 and a waste acid water discharging cyclone separator 3 to reach a concentrated waste acid liquid sealing groove 311;
when the filter cake on the blade reaches a certain thickness, the metatitanic acid leaf filter 1 is placed into a washing water tank 4, a dilute waste acid collecting valve 32 is opened, a concentrated waste acid collecting valve 31 is closed, and dilute waste acid enters a dilute waste acid liquid seal tank 321;
when the collected dilute waste acid reaches a certain time, opening a waste water external discharge valve 33, closing a dilute waste acid collection valve 32, and when the waste water external discharge valve 33 is opened, mainly detecting the turbidity of the externally discharged waste water according to the quality of the externally discharged waste water;
when the turbidity of the external drainage reaches the acidolysis water requirement (less than or equal to 100NTU), opening a wastewater recovery valve 34, and closing a wastewater external drainage valve 33;
after the liquid level of the recovered wastewater liquid seal tank 341 reaches a certain height, a recovered wastewater pump 342 is started, and the wastewater pump is connected to an acidolysis leaching water storage tank 5 for acidolysis leaching;
the utility model estimates the water consumption according to the washing water consumption, and the washing water displacement is about 15m per hour3The acidolysis is carried out in 1 pot at intervals of 3.5 hours, and the water yield is 45m every 3.5 hours3. The amount of wastewater recovered per day reaches 300m3The sewage treatment capacity is reduced by 300m3The water consumption of acidolysis leaching is reduced by 3t/t titanium dioxide per day.
The waste acid water discharging cyclone separator 3 is connected with a vacuum system;
the utility model discloses the waste water recovery technology is washed in the mainly used titanium dioxide production, also is applicable to pressure filter washing waste water recycle.
The utility model discloses electronic teletransmission or DCS control can be implemented to all kinds of collection valves.
Other parts not described belong to the prior art.
Claims (3)
1. Acid waste water recycling device in titanium dioxide production washing process, its characterized in that: comprises a metatitanic acid leaf filter (1) for performing solid-liquid separation on metatitanic acid slurry, a waste acid water discharge pipe (2) connected with the metatitanic acid leaf filter (1), and a waste acid water discharge cyclone separator (3) connected with the waste acid water discharge pipe (2); the waste acid water discharging cyclone separator (3) is connected with a concentrated waste acid liquid seal tank (311) through a concentrated waste acid collecting valve (31), is connected with a dilute waste acid liquid seal tank (321) through a dilute waste acid collecting valve (32), and is connected with a waste water outer liquid seal tank (331) through a waste water outer discharge valve (33).
2. The device for recycling the acidic wastewater generated in the titanium dioxide production water washing process according to claim 1, which is characterized in that: also comprises a washing water tank (4); when the dilute waste acid collecting valve (32) is opened, the metatitanic acid leaf filter (1) is placed into the washing water washing pool (4).
3. The device for recycling the acidic wastewater generated in the titanium dioxide production water washing process according to claim 2, is characterized in that: the waste acid water discharging cyclone separator (3) is connected with a waste water recovery liquid seal tank (341) through a waste water recovery valve (34); the recovered wastewater liquid seal tank (341) is connected with an acidolysis leaching water storage tank (5) through a recovered wastewater pump (342).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022398093.1U CN213699095U (en) | 2020-10-26 | 2020-10-26 | Acid wastewater recycling device in titanium dioxide production water washing process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022398093.1U CN213699095U (en) | 2020-10-26 | 2020-10-26 | Acid wastewater recycling device in titanium dioxide production water washing process |
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| CN213699095U true CN213699095U (en) | 2021-07-16 |
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| CN202022398093.1U Active CN213699095U (en) | 2020-10-26 | 2020-10-26 | Acid wastewater recycling device in titanium dioxide production water washing process |
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Denomination of utility model: A device for reusing acidic wastewater during the water washing process of titanium dioxide production Effective date of registration: 20230630 Granted publication date: 20210716 Pledgee: Agricultural Bank of China Limited Qianjiang Branch Pledgor: QIANJIANG FANGYUAN TITANIUM DIOXIDE CO.,LTD. Registration number: Y2023420000279 |