CN223342459U - Titanium white powder production waste liquid recycle device - Google Patents
Titanium white powder production waste liquid recycle deviceInfo
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- CN223342459U CN223342459U CN202422568731.8U CN202422568731U CN223342459U CN 223342459 U CN223342459 U CN 223342459U CN 202422568731 U CN202422568731 U CN 202422568731U CN 223342459 U CN223342459 U CN 223342459U
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Abstract
The utility model relates to a titanium dioxide production waste liquid recycling device which is characterized in that a collecting pipe of a titanium liquid evaporation concentration system is connected with a water tank, a water outlet of the water tank is connected with a tail gas condensate pipe, the tail gas condensate pipe is connected with a tail gas condensate recycling pipe, the tail gas condensate recycling pipe is respectively connected with a first hot water washing bucket, a second hot water washing bucket and a seed crystal washing bucket, an outlet of the seed crystal washing bucket is connected with a crystal plate frame through a washing water pipe, a filtrate discharge pipe of the seed crystal plate frame is respectively connected with a rear-stage washing waste alkaline water tank, a front-stage washing waste alkaline water tank and a waste alkaline filtrate tank, an outlet of the front-stage washing waste alkaline water tank is connected with a calcination alkaline washing tower through a waste alkaline water pump, and an outlet of the calcination alkaline washing tower is connected with an acidolysis tail gas alkaline liquid tank. The system has simple and reasonable design and convenient operation, ensures that the water and the waste alkali water evaporated by the titanium liquid are recycled, and reduces the treatment cost of alkaline waste gas.
Description
Technical Field
The utility model belongs to the technical field of titanium dioxide production, and particularly relates to a titanium dioxide production waste liquid recycling device.
Background
In the process of producing titanium dioxide by the sulfuric acid method, the black titanium liquid needs to be concentrated to reach the concentration required before water, the hydrolysis process can be carried out, the water in the black titanium liquid is evaporated by the concentrator at a negative pressure and a low temperature, the total titanium concentration is increased from 150g/L to 220-230g/L, the evaporated water of the titanium dioxide is about 2.5t/t per unit product, and the water temperature is about 45 ℃. The water is condensed by the tail gas condenser and is used for pulping black slag, cleaning a pipe filter and the like in the production of titanium dioxide by a sulfuric acid method, and the rest part of the water is discharged into a sewage pipe network, so that the utilization rate is low. Meanwhile, the waste alkali filtrate generated by seed crystal washing is mostly used for acidolysis and calcination tail gas alkali washing towers for spraying at present, and the concentration is uneven, so that the spraying index is unstable. The tail gas condensate water quality after the titanium liquid is evaporated after tracking detection is superior to sand filter water, and can be used for washing water and seed crystal, thereby reducing the water intake and the external drainage. And meanwhile, seed crystal washing filtrate is respectively recovered and collected and recycled in a segmented way, the pH value of spray water of calcination tail gas is stably controlled, the effective utilization rate of alkali is improved, and the wastewater of an alkali washing tower is recovered and used as water for supplementing an acidolysis alkali liquid pool, so that the production cost of titanium dioxide is further reduced. The present invention has been designed for this situation.
Disclosure of Invention
The utility model aims to avoid the defects of the prior art and provides a titanium dioxide production waste liquid recycling device.
The technical scheme is that the titanium dioxide production waste liquid recycling device is characterized in that a collecting pipe of a titanium liquid evaporation concentration system is connected with a water tank, a first liquid level meter and a thermometer are arranged on the water tank, a water outlet at the bottom of the water tank is connected with a tail gas condensate pipe through a drainage pump, an online acid-base concentration analyzer and an online conductivity analyzer are arranged on the tail gas condensate pipe, the tail gas condensate pipe is connected with a tail gas condensate recycling pipe, the tail gas condensate recycling pipe is respectively connected with a hot water washing bucket, a hot water washing bucket and a seed crystal washing bucket through three branch pipes connected with the tail gas condensate pipe, and water inlet electromagnetic valves are respectively arranged on the three branch pipes and are respectively interlocked with the liquid level meters on the hot water washing bucket, the hot water washing bucket and the seed crystal washing bucket;
The water outlet of the seed crystal washing bucket is connected with a washing water pipe through a washing water pump, the washing water pipe is connected with a seed crystal plate frame, a filtrate discharge pipe at the lower part of the seed crystal plate frame is respectively connected with a rear washing waste alkaline water tank, a front washing waste alkaline water tank and a waste alkaline filtrate tank through three branch pipes connected with the washing water pump, an outlet at the lower part of the front washing waste alkaline water tank is connected with a waste alkaline water pipe, the waste alkaline water pipe is connected with a calcination alkaline washing tower through a waste alkaline water pump, a pH meter and a second liquid level meter are arranged on the calcination alkaline washing tower, an outlet at the bottom of the calcination alkaline washing tower is connected with an acidolysis tail gas alkaline liquid pool through a discharge pump, the waste alkaline filtrate pipe at the bottom of the waste alkaline filtrate tank is connected with a concentrated alkaline configuration tank through a waste alkaline filtrate pump, and the waste alkaline filtrate pipe is also connected with a waste alkaline discharge pipe which is connected with the waste alkaline water pipe.
The water outlet at the lower part of the rear washing waste alkaline water tank is connected with a dilute alkali wastewater recycling pipe through a recycling pump, and the dilute alkali wastewater recycling pipe is connected with a washing water pipe.
The waste alkali water pump is also connected with a waste alkali water recycling pipe, and the waste alkali water recycling pipe is connected with the waste alkali filtering tank.
The waste alkali discharge pipe is provided with a fourth electromagnetic valve, an on-line conductivity analyzer is controlled in linkage with the first electromagnetic valve and the second electromagnetic valve, a pH meter on the calcination alkaline washing tower is controlled in linkage with the fourth electromagnetic valve, the first liquid level meter is controlled in linkage with the high and low liquid levels of the drainage pump, and the second liquid level meter is controlled in linkage with the waste alkali water pump and the discharge pump.
The concentrated alkali preparing tank is internally provided with a stirrer, a steam pipe, an alkaline hot gas collecting pipe and a caustic soda flake adding port, and the alkaline hot gas collecting pipe is connected into the calcination caustic scrubber. And the caustic soda flakes are added in a spiral feeding mode, SO that the caustic soda flakes are reduced in splashing caused by heat release in the dissolution process of the caustic soda flakes, and the burning to workers is avoided.
The utility model has the beneficial effects of simple and reasonable system design and convenient operation. The method has the advantages that the water evaporated from the titanium liquid is recycled, the waste alkali filtrate and the waste alkali water prepared by the seed crystal are utilized in an intensive manner, the spray water quality of the calcined tail gas is controlled stably, the tail gas system is economical and stable and reaches the standard, the waste alkali water is fully recycled, the alkali consumption in the titanium white production process is reduced, the steam consumption of heating the washing water is reduced, the alkaline hot gas released by the alkali liquid preparation is collected to the calcined alkali washing tower, the acid-base waste gas is neutralized, the unorganized emission of the alkaline waste gas is reduced, the treatment cost of the alkaline waste gas is reduced, and the production cost of the titanium white is effectively reduced.
Drawings
FIG. 1 is a schematic diagram of the present utility model;
In the figure, an A-water tank, a B-first hot water washing tank, a C-second hot water washing tank, a D-seed crystal washing tank, an E-seed crystal plate frame, an F-back stage washing waste alkali water tank, a G-front stage washing waste alkali water tank, an H-waste alkali filtrate tank, a J-calcination alkaline washing tower, a K-acidolysis tail gas alkali liquid pool and an L-concentrated alkali configuration tank are shown;
1-a tail gas condensate water pipe, 2-a tail gas condensate water recycling pipe, 3-an online acid-base concentration analyzer, 4-an online conductivity analyzer, 5-a washing water pipe, 6-a filtrate discharge pipe, 7-a dilute alkali wastewater recycling pipe, 8-a waste alkaline water pipe, 9-a waste alkali filtrate pipe, 10-a waste alkaline water recycling pipe, 11-a waste alkaline discharge pipe, 12-a steam pipe and 13-an alkaline hot gas collecting pipe;
MI-drain pump, M2-washing water pump, M3-recycling pump, M4-waste alkali water pump, M5-waste alkali filter liquid pump, M6-discharge pump, N1-level gauge, N2-level gauge, F1-solenoid valve, F2-solenoid valve, F3-solenoid valve, F4-solenoid valve.
Detailed Description
The embodiment 1 is shown in figure 1, and is characterized in that a collecting pipe of a titanium liquid evaporation concentration system is connected with a water tank A, a first liquid level meter N1 and a thermometer are arranged on the water tank A, a water outlet at the bottom of the water tank A is connected with a tail gas condensate pipe 1 through a drainage pump MI, an online acid-base concentration analyzer 3 and an online conductivity analyzer 4 are arranged on the tail gas condensate pipe 1, the tail gas condensate pipe 1 is connected with a tail gas condensate recycling pipe 2, the tail gas condensate recycling pipe 2 is respectively connected with a hot water washing bucket B, a hot water washing bucket C and a seed crystal washing bucket D through three branch pipes connected with the tail gas condensate pipe 2, and water inlet electromagnetic valves are respectively arranged on the three branch pipes and are respectively interlocked with the liquid level meters on the hot water washing bucket B, the hot water washing bucket C and the seed crystal washing bucket D;
The water outlet of the seed crystal washing bucket D is connected with a washing water pipe 5 through a washing water pump M2, the washing water pipe 5 is connected with a crystal seed frame E, a filtrate discharge pipe 6 at the lower part of the crystal seed frame E is respectively connected with a rear washing waste alkaline water tank F, a front washing waste alkaline water tank G and a waste alkali filtrate tank H through three branch pipes connected with the washing water pipe, an outlet at the lower part of the front washing waste alkaline water tank G is connected with a waste alkaline water pipe 8, the waste alkaline water pipe 8 is connected with a calcination alkaline washing tower J through a waste alkaline water pump M4, a pH meter and a second liquid level meter N2 are arranged on the calcination alkaline washing tower J, an outlet at the bottom of the calcination alkaline washing tower J is connected with an acidolysis tail gas alkali liquid pool K through a discharge pump M6, a waste alkali filtrate pipe 9 at the bottom of the waste alkali filtrate tank H is connected with a concentrated alkali configuration tank L through a waste alkali filtrate pump M5, a waste alkali discharge pipe 11 is also connected with the waste alkaline water pipe 11, and the waste alkaline discharge pipe 11 is connected with the waste alkaline water pipe 8.
The water outlet at the lower part of the rear washing waste alkaline water tank F is connected with a dilute alkali waste water recycling pipe 7 through a recycling pump M3, and the dilute alkali waste water recycling pipe 7 is connected with a washing water pipe 5.
The waste alkali water pump 4 is also connected with a waste alkali water recycling pipe 10, and the waste alkali water recycling pipe 10 is connected into a waste alkali filtrate tank H.
The waste alkali treatment device is characterized in that a first electromagnetic valve F1 is arranged on the tail gas condensate pipe 1, a second electromagnetic valve F2 is arranged on the tail gas condensate recycling pipe 2, a third electromagnetic valve F3 is arranged on the waste alkali pipe 8, a fourth electromagnetic valve F4 is arranged on the waste alkali discharge pipe 11, an online conductivity analyzer 4 is in linkage control with the first electromagnetic valve F1 and the second electromagnetic valve F2, a pH meter on the calcination alkaline washing tower J is in linkage control with the fourth electromagnetic valve F4, a first liquid level meter N1 is in linkage control with the high and low liquid levels of the drainage pump MI, and a second liquid level meter N2 is in linkage control with the waste alkali pump M4 and the discharge pump M6.
The concentrated alkali preparing tank L is internally provided with a stirrer, a steam pipe 12, an alkaline hot gas collecting pipe 13 and a caustic soda flake adding port, and the alkaline hot gas collecting pipe 13 is connected into a calcination caustic wash tower J. Mixing and neutralizing with SO 2 in calcination tail gas in calcination alkaline washing tower J, discharging to reach standard, adding tablet alkali in spiral feeding mode to reduce tablet alkali powder splashing caused by heat release in tablet alkali dissolving process, and avoiding burning to staff
The working process comprises the following steps:
The tail gas condensate water collected by the titanium liquid evaporation concentration system is collected to a water tank A, a first liquid level meter N1 on the water tank A is in linkage high-low liquid level control with a drainage pump MI, when the liquid level is higher than 90%, the drainage pump MI is started, and when the liquid level is lower than 30%, the drainage pump MI is stopped;
The on-line conductivity analyzer 4 on the tail gas condensate pipe 1 is controlled by the first electromagnetic valve F1 and the second electromagnetic valve F2 in a linkage way, when the conductivity exceeds a set value of 300us/cm, the on-line conductivity analyzer 4 gives a signal to the main control machine, the main control machine cuts off the power supply of the second electromagnetic valve F2, the second electromagnetic valve F2 is closed and cut off, the tail gas condensate stops recycling, meanwhile, the power supply of the first electromagnetic valve F1 is opened, the tail gas condensate is recycled to the frozen black slag for pulping, and redundant waste water is discharged to a sewage pipe network. When the conductance of the online conductance analyzer 4 is lower than the set value of 300us/cm, the wastewater is recycled to the first washing hot water barrel B, the second washing hot water barrel C and the seed crystal washing water barrel D through the tail gas condensed water recycling pipe 2, and the first washing hot water barrel B, the second washing hot water barrel C and the seed crystal washing water barrel D are respectively provided with a water inlet pipe and a water outlet pipe
The water inlet electromagnetic valve is respectively interlocked with the liquid level meter of the water inlet electromagnetic valve, and the reuse water is recycled to the seed crystal washing water bucket D preferentially by setting different high and low liquid level controls, such as setting the high and low liquid level of the seed crystal washing water bucket D to be 95% and 80% and setting the high and low liquid level of the second washing hot water bucket C to be 80% and 60% and setting the high and low liquid level of the first washing hot water bucket B to be 60% and 40% respectively.
In the squeezing process of the crystal plate frame E, filtrate enters a waste alkali filtrate tank H, washing waste alkaline water is collected in a segmented way in the washing process, the front section enters a front section washing waste alkaline water tank G, and the rear section enters a rear section washing waste alkaline water tank F;
And when the pH value is higher than 10, the fourth electromagnetic valve F4 is closed, SO that the stable pH value of spray water of the calcination alkaline washing tower J is ensured, alkali is saved, and the tail gas SO 2 is stably discharged up to the standard. (the pH value can be set according to the exhaust gas treatment conditions, e.g., 9-11)
The second liquid level meter N2 is interlocked with the waste alkali water pump M4 and the discharge pump M6, when the liquid level is higher than 95%, the discharge pump M6 is started, when the liquid level is lower than 30%, the discharge pump M6 is stopped, the waste alkali water pump M4 is started, and when the liquid level is higher than 80%, the waste alkali water pump M4 is stopped.
When the water in the front section washing waste alkaline water barrel G is surplus, the waste alkaline water can be returned to the waste alkaline filtrate barrel H through the waste alkaline water recycling pipe 10, and then is recycled to the concentrated alkaline preparation tank L through the waste alkaline filtrate pipe 9 for alkali liquid preparation.
The online acid-base concentration analyzer 3 is used for assisting in judging the water quality condition of the concentrated tail gas condensate, if the pH value is smaller than 6.0, the concentrated tail gas condensate is judged to have leakage points, the tail gas condensate is subjected to freezing and black slag removal through a pipeline connected with the end of the tail gas condensate pipe 1 to pulp, and the redundant part is discharged into a sewage pipe network.
The water tank A, the first hot water washing bucket B, the second hot water washing bucket C, the seed crystal washing bucket D, the rear washing waste alkaline water bucket F, the front washing waste alkaline water bucket G, the waste alkaline filtrate bucket H and the concentrated alkali configuration tank L are all insulated by adopting heat insulation materials, so that heat loss is reduced.
Claims (5)
1. A titanium dioxide production waste liquid recycling device is characterized in that a collecting pipe of a titanium liquid evaporation concentration system is connected with a water tank (A), a first liquid level meter (N1) and a thermometer are arranged on the water tank (A), a water outlet at the bottom of the water tank (A) is connected with a tail gas condensation water pipe (1) through a drainage pump (MI), an online acid-base concentration analyzer (3) and an online conductivity analyzer (4) are arranged on the tail gas condensation water pipe (1), the tail gas condensation water pipe (1) is connected with a tail gas condensation water recycling pipe (2), the tail gas condensation water recycling pipe (2) is respectively connected with a hot water washing bucket (B), a second hot water washing bucket (C) and a seed crystal washing bucket (D) through three branch pipes connected with the tail gas condensation water recycling pipe, and water inlet electromagnetic valves are respectively arranged on the three branch pipes and are respectively interlocked with the liquid level meters on the hot water washing bucket (B), the second hot water washing bucket (C) and the seed crystal washing bucket (D);
The water outlet of the seed crystal washing bucket (D) is connected with a washing water pipe (5) through a washing water pump (M2), the washing water pipe (5) is connected with a crystal plate frame (E), a filtrate discharge pipe (6) at the lower part of the crystal plate frame (E) is respectively connected with a rear washing waste alkaline water tank (F), a front washing waste alkaline water tank (G) and a waste alkaline filtrate tank (H) through three branch pipes connected with the washing water pipe, an outlet at the lower part of the front washing waste alkaline water tank (G) is connected with a waste alkaline water pipe (8), the waste alkaline water pipe (8) is connected with a calcination alkaline washing tower (J) through a waste alkaline water pump (M4), a pH meter and a second liquid level meter (N2) are arranged on the calcination alkaline washing tower (J), an outlet at the bottom of the calcination alkaline washing tower (J) is connected with an acidolysis tail gas alkaline liquid pool (K) through a discharge pump (M6), a waste alkaline filtrate pipe (9) at the bottom of the waste alkaline filtrate tank (H) is connected with a concentrated alkaline configuration tank (L) through a waste alkaline filtrate pump (M5), and a waste alkaline discharge pipe (11) is also connected with the waste alkaline filtrate pipe (9), and the waste alkaline water pipe (11) is connected with the waste alkaline water pipe (8).
2. The titanium pigment production waste liquid recycling device according to claim 1, wherein a water outlet at the lower part of the rear washing waste alkali water tank (F) is connected with a dilute alkali waste water recycling pipe (7) through a recycling pump (M3), and the dilute alkali waste water recycling pipe (7) is connected with a washing water pipe (5).
3. The titanium pigment production waste liquid recycling device according to claim 1, wherein the waste alkali water pump (M4) is also connected with a waste alkali water recycling pipe (10), and the waste alkali water recycling pipe (10) is connected into the waste alkali filtering tank (H).
4. The titanium pigment production waste liquid recycling device according to claim 1 is characterized in that a first electromagnetic valve (F1) is arranged on a tail gas condensate water pipe (1), a second electromagnetic valve (F2) is arranged on a tail gas condensate water recycling pipe (2), a third electromagnetic valve (F3) is arranged on a waste alkali water pipe (8), a fourth electromagnetic valve (F4) is arranged on a waste alkali discharge pipe (11), an online conductivity analyzer (4) is in linkage control with the first electromagnetic valve (F1) and the second electromagnetic valve (F2), a pH meter on a calcination alkaline washing tower (J) is in linkage control with the fourth electromagnetic valve (F4), a first liquid level meter (N1) is in linkage control with a draining pump (MI) in high-low liquid level, and a second liquid level meter (N2) is in linkage control with a waste alkali pump (M4) and a discharging pump (M6).
5. The titanium pigment production waste liquid recycling device according to claim 1 is characterized in that a stirrer, a steam pipe (12), an alkaline hot gas collecting pipe (13) and a caustic soda flake adding port are arranged in the concentrated alkali configuration groove (L), and the alkaline hot gas collecting pipe (13) is connected into a calcination caustic wash tower (J).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202422568731.8U CN223342459U (en) | 2024-10-24 | 2024-10-24 | Titanium white powder production waste liquid recycle device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202422568731.8U CN223342459U (en) | 2024-10-24 | 2024-10-24 | Titanium white powder production waste liquid recycle device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN223342459U true CN223342459U (en) | 2025-09-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202422568731.8U Active CN223342459U (en) | 2024-10-24 | 2024-10-24 | Titanium white powder production waste liquid recycle device |
Country Status (1)
| Country | Link |
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| CN (1) | CN223342459U (en) |
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2024
- 2024-10-24 CN CN202422568731.8U patent/CN223342459U/en active Active
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