Titanium dioxide production filter pressing system

Abstract

The utility model relates to a titanium dioxide production filter pressing system which is characterized in that a discharge hole in the lower part of a slurry tank is connected with a slurry conveying pipe through a slurry pump, and the slurry conveying pipe is connected into a slurry feeding end of a diaphragm filter press; a water outlet in the lower part of the squeezing water tank is connected with a squeezing water pipe through a squeezing water pump; a water outlet in the lower part of the cloth washing water tank is connected with a cloth washing water pipe through a cloth washing water pump, the cloth washing water pipe is connected with a water inlet of a cloth washing system booster pump of the diaphragm filter press, a clear liquid outlet of the diaphragm filter press is connected with a clear liquid pipe, and the clear liquid pipe is connected with a clear water tank; the clear liquid pipe is further connected with a concentrated liquid pipe through a three-way pipe, and the concentrated liquid pipe returns and is connected into the slurry tank. Automatic high-pressure cleaning of the filter cloth is designed, manual intervention is reduced, and the production efficiency is improved. According to the system, mud and clear water used for back blowing, corner blowing, squeezing, cloth washing and the like can be recycled, and energy is saved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the resource recycling technology field, concretely relates to a titanium dioxide production filter pressing system. BACKGROUND

[0002] In the production process of titanium dioxide by sulfuric acid method, liquid or slurry containing calcium mud is often produced. The moisture content of filter cake is high, and the subsequent drying, recovery and other treatments are difficult, which increases the production cost. Calcium mud usually has high viscosity, high solid content and complex composition, and the small particles in the calcium mud are easy to block the filter cloth, resulting in a decrease in filtration efficiency. When the slurry pump is used for feeding, the increase of feeding time will make the filter cake gradually thicken, but too long feeding time may cause the moisture content of filter cake to rise, and even the "sandwich" phenomenon may occur. SUMMARY

[0003] The utility model discloses a kind of titanium dioxide production filter pressing systems to avoid the deficiencies of prior art.

[0004] To achieve the above object, the technical scheme adopted by the utility model is: a titanium dioxide production filter pressing system, including slurry tank, diaphragm filter press, characterized by: the slurry tank lower part discharge port is connected with slurry pump through slurry pump connection slurry pipe, slurry pipe is connected with the slurry inlet end of diaphragm filter press;The water outlet of the lower part of press water tank is connected with press water pipe through press water pump, and the press water pipe is connected with the press water inlet pipe of diaphragm filter press;The water outlet of the lower part of washing cloth water tank is connected with washing cloth water pipe through washing cloth water pump, and the washing cloth water pipe is connected with the washing cloth system booster pump water inlet of diaphragm filter press;The clear liquid outlet of diaphragm filter press is connected with clear liquid pipe, and the clear liquid pipe is connected with clear water pool;The clear liquid pipe is also connected with concentrated liquid pipe through three-way pipe, and the concentrated liquid pipe is returned and connected with slurry tank.

[0005] The slurry pipe is also connected with return slurry pipe, and the return slurry pipe is connected with slurry tank;Slurry pipe is equipped with diaphragm pressure gauge and electrolytic point pressure gauge for controlling slurry pressure and flow, and slurry pipe is also equipped with pressure transmitter for monitoring resistance change in filtration process.

[0006] The press water pipe is equipped with diaphragm pressure gauge and electrolytic point pressure gauge for controlling press water pressure and flow;The press water pipe is also connected with press backwater pipe, and the press backwater pipe is connected with press water tank;The press water tank is connected with water inlet pipe, and the bottom of press water tank is equipped with emptying pipe.

[0007] The washing cloth water pipe is also connected with washing cloth backwater pipe, and the washing cloth backwater pipe is connected with washing cloth water tank;The washing cloth water tank is connected with water inlet pipe, and the bottom of washing cloth water tank is equipped with emptying pipe.

[0008] The blowback inlet pipe of diaphragm filter press is connected with blowback pipe, and the end of blowback pipe is connected with the gas outlet of compressed air storage tank, and the gas inlet of compressed air storage tank is connected with the gas inlet of air compressor.

[0009] The backflush pipe is also connected to an angle blow pipe, which is connected to the angle blow inlet of the filter plate of the diaphragm filter press; the angle blow pipe is also connected to a clear liquid pipe.

[0010] The air compressor's air outlet is also connected to an air supply pipe, which is connected to the inlet of the refrigerated dryer. The outlet of the refrigerated dryer is connected to an instrument air tank, and the outlet of the instrument air tank is connected to the pneumatic valve actuator of the filter press through a water separator and air filter, which is used to start and stop all pneumatic control valves of the calcium mud filter press system.

[0011] The beneficial effects of this invention are: it designs an automatic high-pressure cleaning system for filter cloth, reducing manual intervention and improving production efficiency. This system can reuse the slurry and clean water used in backflushing, angle blowing, pressing, and cloth washing, saving energy. A diaphragm pressure gauge and an electrolysis point pressure gauge are installed on the slurry delivery pipe to control the slurry pressure and flow rate, as well as a pressure transmitter to monitor resistance changes during filtration. Based on real-time changes in filter cake thickness and filtration resistance, the system automatically adjusts the pressure, monitors the filter cake thickness in real time, and automatically adjusts the operating parameters of the filter press according to set parameters to achieve precise control of the filter cake thickness. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the present invention;

[0013] In the diagram: 1-Pulp tank, 2-Pulp pump, 3-Diaphragm filter press, 4-Pressing water tank, 5-Pressing water pump, 6-Cloth washing water tank, 7-Cloth washing water pump, 8-Air compressor, 9-Backflush air tank, 10-Refrigerated dryer, 11-Instrument air tank, 12-Water separator and air filter, 13-Filter press pneumatic valve actuator, 14-Pressure transmitter; D1-Pulp conveying pipe, D2-Pulp return pipe, D3-Clearing liquid pipe, D4-Concentrated liquid pipe, L1-Water inlet pipe, L2-Drain pipe; E1-Pressing water pipe, E2-Pressing return water pipe, E3-Cloth washing water pipe, E4-Cloth washing return water pipe; G1-Backflush pipe, G2-Angle blow pipe, G3-Air supply pipe. Detailed Implementation

[0014] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0015] See Figure 1A kind of titanium dioxide production filter pressing system, including slurry tank 1, diaphragm filter press 3, it is characterized in that: the slurry tank 1 lower discharge outlet is connected with slurry pipe D1 by slurry pump 2, slurry pipe D1 is connected with slurry inlet end of diaphragm filter press 3;Pressing water tank 4 lower water outlet is connected with pressing water pipe E1 by pressing water pump 5, pressing water pipe E1 is connected with pressing water pipe of diaphragm filter press 3;Washing cloth water tank 6 lower water outlet is connected with washing cloth water pipe E3 by washing cloth water pump 7, washing cloth water pipe E3 is connected with washing cloth system booster pump water inlet of diaphragm filter press 3, the clear liquid outlet of diaphragm filter press 3 is connected with clear liquid pipe D3, and clear liquid pipe D3 is connected with clear water pool;The clear liquid pipe D3 is also connected with concentrated liquid pipe D4 by three-way pipe, and concentrated liquid pipe D4 is returned and connected with slurry tank 1.

[0016] The slurry pipe D1 is also connected with return slurry pipe D2 near the slurry inlet end of diaphragm filter press 3, and return slurry pipe D2 is connected with slurry tank 1;The slurry pipe D1 is provided with diaphragm pressure gauge and electrolytic point pressure gauge for controlling slurry pressure and flow, and the slurry pipe D1 is also provided with pressure transmitter 14 for monitoring resistance change in filtering process.

[0017] The pressing water pipe E1 is provided with diaphragm pressure gauge and electrolytic point pressure gauge for controlling pressing water pressure and flow;The pressing water pipe E1 is also connected with pressing return water pipe E2, and pressing return water pipe E2 is connected with pressing water tank 4;The pressing water tank 4 is connected with water inlet pipe L1, and the bottom of the pressing water tank 4 is provided with emptying pipe L2.

[0018] The washing cloth water pipe E3 is also connected with washing cloth return water pipe E4, and washing cloth return water pipe E4 is connected with washing cloth water tank 6;The washing cloth water tank 6 is connected with water inlet pipe L1, and the bottom of the washing cloth water tank 6 is provided with emptying pipe L2.

[0019] The back flushing inlet pipe of the diaphragm filter press 3 is connected with back flushing pipe G1, and the end of the back flushing pipe G1 is connected with the gas outlet of the compressed air storage tank 9, and the gas inlet of the compressed air storage tank 9 is connected with the gas outlet of the air compressor 8.

[0020] The back flushing pipe G1 is also connected with angle flushing pipe G2, and the angle flushing pipe G2 is connected with the filter plate angle flushing inlet of the diaphragm filter press 3;The angle flushing pipe G2 is also connected with the clear liquid pipe D3.

[0021] The gas outlet of the air compressor 8 is also connected with gas supply pipe G3, and the gas supply pipe G3 is connected with the inlet of the cold dryer 10, and the outlet of the cold dryer 10 is connected with the instrument air tank 11, and the outlet of the instrument air tank 11 is connected with the compressed filter machine pneumatic valve actuator 13 through the water distribution gas filter 12, for starting and stopping of all pneumatic control valves of the calcium mud filter pressing system.

[0022] Working process:

[0023] First step: open the slurry pump 2, the slurry in the slurry tank 1 enters the diaphragm filter press 3 through the slurry pipe D1, the thick filtrate generated before the feeding section returns to the slurry tank 1 through the thick liquid pipe D4, and the dilute filtrate enters the clear water tank through the clear liquid pipe D3; when the feeding time and feeding pressure reach the set value, stop feeding, close the slurry pump 2, and the thick filtrate in the slurry pipe D1 flows to the slurry tank 1 by gravity through the return slurry pipe D2;

[0024] Second step: open the valve on the water inlet pipe L1 of the press water tank 4, start the press water pump 5, and the water in the press water tank 4 enters the press inlet of the diaphragm filter press 3 through the press water pipe E1 for pressing; when the pressing pressure and time reach the set value, the pressing is completed, the valve on the water inlet pipe L1 of the press water tank 4 is closed, the press water pump 5 is closed, and the diaphragm filter press 3 stops feeding; the water in the press water pipe E1 flows to the press water tank 4 by gravity through the press return water pipe E2; open the valve on the emptying pipe L2 of the press water tank 4, and empty the press water tank 4.

[0025] Third step: open the air compressor 8, the compressed air enters the blowback gas tank 9, enters the center blow inlet of the diaphragm filter press 3 through the blowback pipe G1 for center blowback; when the blowback time reaches the set value, the filter plate center hole filter slurry of the diaphragm filter press 3 is blowbacked to the slurry tank 1 through the thick liquid pipe D4, and the blowback gas tank 9 outlet valve is closed.

[0026] Fourth step: the compressed air in the blowback gas tank 9 enters the filter plate angle blow inlet of the diaphragm filter press 3 through the angle blow pipe G2 for angle blow; when the angle blow time reaches the set value, the turbid liquid generated by the angle blow is discharged to the slurry tank 1 through the thick liquid pipe D4, and the blowback gas tank 9 outlet valve is closed.

[0027] Fifth step: first loosen the head of the diaphragm filter press 3, start the plate pulling and shaking operation, unload to the filter cake collection hopper, and the dry mud after pressing is sent to the slag field for stacking by the belt conveyor.

[0028] Sixth step: cut the diaphragm filter press 3 to the manual or automatic washing position, the diaphragm filter press 3 is in the pulling open state, open the washing water pump 7, the water in the washing water tank 6 enters the washing system booster pump inlet of the diaphragm filter press 3 through the washing water pipe E3 to start washing, after washing is completed, close the washing water pump 7, the water in the washing water pipe E3 flows to the washing water tank 6 by gravity through the washing return water pipe E4; open the valve on the emptying pipe L2 of the washing water tank 6, and empty the washing water tank 6.

[0029] Air compression system working process: the air compressor 8 produces compressed air, which enters the cold dryer 10, the gas tank 11, and then the water distribution filter 12 through the gas supply pipe G3 in sequence, controls the pneumatic valve actuator 13 of the filter system, and is used for starting and stopping all pneumatic control valves of the titanium dioxide calcium mud filter system.

[0030] Control system parameter setting and adjustment: The automatic control system automatically adjusts the operating parameters of the filter press according to pre-set parameters (such as target filter cake thickness, maximum allowed filtration resistance, etc.). When the filter cake thickness reaches the set value or the filtration resistance exceeds the allowed range, the system will automatically reduce the pressure of the filter press to prevent the filter cake from being too thick or the filtration resistance from being too large.

Claims

1. A filter pressing system for titanium dioxide production, comprising a slurry tank (1), a diaphragm filter press (3), characterized in that: The slurry tank (1) is connected with a slurry pump (2) through a slurry outlet, the slurry pump (2) is connected with a slurry pipe (D1), the slurry pipe (D1) is connected with a slurry inlet of a diaphragm filter press (3); a press water tank (4) is connected with a press water pump (5) through a press water outlet, the press water pump (5) is connected with a press water pipe (E1), the press water pipe (E1) is connected with a press water inlet pipe of the diaphragm filter press (3); a washing water tank (6) is connected with a washing water pump (7) through a washing water outlet, the washing water pump (7) is connected with a washing water pipe (E3), the washing water pipe (E3) is connected with a washing water inlet pipe of a washing system booster pump of the diaphragm filter press (3), a clear liquid outlet of the diaphragm filter press (3) is connected with a clear liquid pipe (D3), the clear liquid pipe (D3) is connected with a clear water tank; the clear liquid pipe (D3) is further connected with a concentrated liquid pipe (D4) through a three-way pipe, the concentrated liquid pipe (D4) is connected with the slurry tank (1).

2. The filter pressing system for titanium dioxide production according to claim 1, characterized in that: The slurry pipe (D1) is further connected with a return slurry pipe (D2) near the slurry inlet of the diaphragm filter press (3), the return slurry pipe (D2) is connected with the slurry tank (1); the slurry pipe (D1) is provided with a diaphragm pressure gauge and an electrolytic point pressure gauge for controlling the pressure and flow of the slurry; the slurry pipe (D1) is further provided with a pressure transmitter (14) for monitoring the resistance change in the filtering process.

3. The filter pressing system for titanium dioxide production according to claim 1, characterized in that: The press water pipe (E1) is provided with a diaphragm pressure gauge and an electrolytic point pressure gauge for controlling the pressure and flow of the press water; the press water pipe (E1) is further connected with a press return water pipe (E2), the press return water pipe (E2) is connected with the press water tank (4); the press water tank (4) is connected with a water inlet pipe (L1), and the press water tank (4) is provided with a discharge pipe (L2) at the bottom.

4. The filter pressing system for titanium dioxide production according to claim 1, characterized in that: The washing water pipe (E3) is further connected with a washing return water pipe (E4), the washing return water pipe (E4) is connected with the washing water tank (6); the washing water tank (6) is connected with a water inlet pipe (L1), and the washing water tank (6) is provided with a discharge pipe (L2) at the bottom.

5. The filter pressing system for titanium dioxide production according to claim 1, characterized in that: The diaphragm filter press (3) is connected with a back flushing pipe (G1) through a back flushing inlet pipe, an end of the back flushing pipe (G1) is connected with an air outlet of a compressed air storage tank (9), and an air inlet of the compressed air storage tank (9) is connected with a gas outlet of an air compressor (8).

6. A filter pressing system for titanium dioxide production according to claim 5, characterized in that: The back flushing pipe (G1) is further connected with an angle flushing pipe (G2), the angle flushing pipe (G2) is connected with an angle flushing inlet of a filter plate of the diaphragm filter press (3); the angle flushing pipe (G2) is further connected with the clear liquid pipe (D3).

7. A filter pressing system for titanium dioxide production according to claim 5, characterized in that: The gas outlet of the air compressor (8) is further connected with a gas supply pipe (G3), the gas supply pipe (G3) is connected with an inlet of a refrigerating dryer (10), an outlet of the refrigerating dryer (10) is connected with an instrument air storage tank (11), and an outlet of the instrument air storage tank (11) is connected with a filter press pneumatic valve actuator (13) through a water distribution and gas filter (12), which is used for starting and stopping all pneumatic control valves of the calcium sludge filter pressing system.

Images