Copperas separating and washing system for titanium dioxide production

Abstract

The utility model relates to a copperas separating and washing system for titanium dioxide production, which is characterized in that an industrial water pipe and an ice maker cooling water pipe are combined and connected into a mixed water pipe, the mixed water pipe is connected with a three-stage washing water pipe through a booster pump, a plurality of nozzles are arranged at the tail end of the three-stage washing water pipe, and the nozzles are arranged above a disc filter; a first-stage distributor is arranged at the tail end opening of a first-stage washing water pipe connected to the first washing barrel, and the first-stage distributor is arranged above the disc filter; a second-stage distributor is arranged at the tail end opening of a second-stage washing water pipe connected to the second-stage washing barrel, and is arranged above the disc filter. Mixed water of ice maker cooling water and industrial water is used as third-stage washing water, so that the use amount of the ice maker cooling water is reduced, and energy is saved; the volume of three-stage washing water is stably controlled by adding a pump and an automatic regulating valve, so that the quality fluctuation of washed copperas caused by the change of water pressure and flow is avoided; three-stage washing water can be uniformly sprayed to the surface of copperas by the spray head, so that the copperas can be better cleaned, and the quality of the copperas is controlled.

Description

TECHNICAL FIELD

[0001] The utility model belongs to titanium dioxide production equipment technical field, concretely relates to a kind of titanium dioxide production green vitriol separation washing system. BACKGROUND

[0002] The freezing crystallization procedure involved in titanium dioxide production process is to reduce titanium liquid of 45-50 ℃ to 16-17.5 ℃ by heat exchange, because of the temperature reduction of titanium liquid, ferrous sulfate in solution reaches supersaturation solubility, and precipitates in the form of ferrous sulfate heptahydrate (green vitriol) crystal, the mixture of green vitriol and titanium liquid is sent to filter, green vitriol and titanium liquid are separated, and then washed with water to make ferrous meet quality requirements. The temperature of first, second and third stage washing water in the washing process is required to be 14-15 ℃, if the temperature is too high, part of green vitriol is redissolved in titanium liquid in the process of washing green vitriol, causing unqualified titanium liquid.

[0003] In the prior art, on the one hand, the third stage washing water uses ice machine cooling water with a temperature of 9 ℃ in the freezing crystallization procedure and industrial water with a temperature of 4-22 ℃ (in winter in the north, the temperature of industrial water is about 4 ℃ at the lowest), because the ice machine cooling uses steam or electric energy to reduce the cooling water, which causes waste of energy; on the other hand, the third stage washing water plays a very key role as the last step of washing green vitriol, sometimes the washing water pressure and size are unstable when using the distributor, causing the third stage washing water to be large or small, and ferrous is not cleaned thoroughly. SUMMARY

[0004] The utility model discloses a kind of green vitriol separation washing systems of titanium dioxide production to avoid the deficiency of prior art.

[0005] To achieve the above object, the technical scheme adopted by the utility model is as follows: a kind of green vitriol separation washing systems of titanium dioxide production, characterized by: industrial water pipe and ice machine cooling water pipe and merge access mixed water pipe, the water inlet of booster pump is connected with mixed water pipe, the water outlet of booster pump is connected with third stage washing water pipe, the end of third stage washing water pipe is equipped with multiple spray heads, and the spray head is arranged above disc filter;The end of first stage washing water pipe connected with a washing barrel is equipped with first stage distributor, and the first stage distributor is arranged above disc filter;The end of second stage washing water pipe connected with two washing barrels is equipped with second stage distributor, and the second stage distributor is arranged above disc filter.

[0006] The number of the spray head is 10-15, and is evenly distributed along the horizontal direction of the third stage washing water pipe.

[0007] Manual valve and stop valve are arranged on the industrial water pipe and ice machine cooling water pipe, and the third stage washing water temperature is controlled by adjusting the opening degree of the manual valve.

[0008] The primary washing water pipe and the secondary washing water pipe are provided with manual valves.

[0009] The tertiary washing water pipe is provided with a pressure gauge, a thermometer and a flow meter, so that the pressure and the flow can be stabilized in a required range.

[0010] The utility model discloses the beneficial effect has: simple technology, use ice machine cooling water and industrial water mixed water as tertiary washing water, control tertiary washing water temperature through the adjustment manual valve opening degree, industrial water temperature is about 22 DEG C in summer, and industrial water manual valve opening degree is small, and ice machine cooling water manual valve opening degree is big, and control tertiary washing water temperature 14-15 DEG C, industrial water temperature is less than 15 DEG C in winter, can close ice machine cooling water manual valve, only uses industrial water, in spring and autumn, adjust ice machine cooling water manual valve and industrial water manual valve opening degree can accurate control tertiary washing water temperature 14-15 DEG C, like this can reduce ice machine cooling water use amount, save energy, reduce production cost, adopt the pump and automatic regulating valve control tertiary washing water's pressure and flow to stabilize in the required range, avoid because of the water pressure and flow change and cause the quality fluctuation of washing after green vitriol, and the spray head can evenly spray tertiary washing water to the green vitriol surface, better washes green vitriol, controls green vitriol quality. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is the schematic diagram of the utility model;

[0012] Figure 2 It is the overhead view of the disc filter of the utility model;

[0013] In the drawing: L1-industrial water pipe, L2-ice machine cooling water pipe, L-mixed water pipe, 1-primary washing water pipe, 2-secondary washing water pipe, 3-tertiary washing water pipe, 4-boosting pump, 5-disc filter, 1a-primary distributor, 2a-secondary distributor, 3a-spray head. PREFERRED EMBODIMENT

[0014] See Figure 1 , a kind of titanium dioxide production green vitriol separation washing system, it is characterized by: industrial water pipe L1 and ice machine cooling water pipe L2 and merge access mixed water pipe L, the water inlet of boosting pump 4 is connected mixed water pipe L, the water outlet of boosting pump 4 is connected tertiary washing water pipe 3, tertiary washing water pipe 3 end port is equipped with multiple spray heads 3a, the spray head 3a is set above disc filter 5;Connected to a washing barrel primary washing water pipe 1 end port is equipped with primary distributor 1a, primary distributor 1a is set above disc filter 5;Connected to two washing barrels secondary washing water pipe 2 end port is equipped with secondary distributor 2a, secondary distributor 2a is set above disc filter 5.

[0015] The number of the spray heads 3a is 10-15, which are evenly distributed along the horizontal direction of the third-stage washing water pipe 3.

[0016] The industrial water pipe L1 and the ice machine cooling water pipe L2 are both provided with a manual valve and a stop valve, and the third-stage washing water temperature is controlled by adjusting the opening degree of the manual valve.

[0017] The first-stage washing water pipe 1 and the second-stage washing water pipe 2 are both provided with a manual valve.

[0018] The third-stage washing water pipe 3 is provided with a pressure gauge, a thermometer and a flowmeter, which are convenient for stabilizing the pressure and flow within the required range; the third-stage washing water pipe 3 is also provided with a manual valve, a stop valve and an automatic regulating valve, and the third-stage washing water flow is stabilized by increasing the pump 4 and the automatic regulating valve.

[0019] Working process:

[0020] I. Start the disc filter 5, and pump the titanium liquid of the refrigeration crystallization process into the disc filter 5;

[0021] II. Open the manual valve on the first-stage washing water pipe 1, and the first-stage washing water is distributed to the disc filter 5 through the first-stage washing water pipe 1 and the first-stage distributor 1a to perform the first washing of green vitriol;

[0022] III. Open the manual valve on the second-stage washing water pipe 2, and the second-stage washing water is distributed to the disc filter 5 through the second-stage washing water pipe 2 and the second-stage distributor 2a to perform the second washing of green vitriol;

[0023] IV. Open the manual valves on the industrial water pipe L1 and the ice machine cooling water pipe L2, start the booster pump 4, open the manual valve on the third-stage washing water pipe 3, set the third-stage washing water flow, and the regulating valve on the third-stage washing water pipe 3 is automatically regulated, and the third-stage washing water is sprayed to the disc filter 5 through the spray heads 3a to perform the third washing of green vitriol.

Claims

1. A system for separating and washing green vitriol in titanium dioxide production, characterized in that it comprises: The industrial water pipe (L1) and the ice machine cooling water pipe (L2) are combined into a mixed water pipe (L), the water inlet of the booster pump (4) is connected with the mixed water pipe (L), the water outlet of the booster pump (4) is connected with the third-stage washing water pipe (3), the end of the third-stage washing water pipe (3) is provided with a plurality of spray heads (3a), the spray heads (3a) are arranged above the disc filter (5); the end of the first-stage washing water pipe (1) connected with a washing barrel is provided with a first-stage distributor (1a), the first-stage distributor (1a) is arranged above the disc filter (5); the end of the second-stage washing water pipe (2) connected with a washing barrel is provided with a second-stage distributor (2a), the second-stage distributor (2a) is arranged above the disc filter (5).

2. A system for separating and washing green vitriol from titanium dioxide production according to claim 1, characterized in that: The number of the spray heads (3a) is 10-15, which are uniformly distributed along the horizontal direction of the third-stage washing water pipe (3).

3. A system for separating and washing green vitriol from titanium dioxide production according to claim 1, characterized in that: Manual valves and stop valves are arranged on the industrial water pipe (L1) and the ice machine cooling water pipe (L2), and the third-stage washing water temperature is controlled by adjusting the opening degree of the manual valves.

4. A system for separating and washing green vitriol from titanium dioxide production according to claim 1, characterized in that: Manual valves are arranged on the first-stage washing water pipe (1) and the second-stage washing water pipe (2).

5. A system for separating and washing green vitriol from titanium dioxide production according to claim 1, characterized in that: A pressure gauge, a thermometer and a flowmeter are arranged on the third-stage washing water pipe (3), so that the pressure and the flow can be stabilized in the required range; manual valves, stop valves and automatic regulating valves are further arranged on the third-stage washing water pipe (3), and the third-stage washing water flow is stabilized by the booster pump (4) and the automatic regulating valves.

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