阅读说明：本技术 一种浸钴残渣逆流洗涤装置及洗涤方法 (Cobalt leaching residue countercurrent washing device and washing method ) 是由 许开华 张爱青 李炳忠 王超 王博 史齐勇 于 2020-12-29 设计创作，主要内容包括：本发明公开了一种浸钴残渣逆流洗涤装置,包括隔膜压滤机及分别与隔膜压滤机连接的压榨水管道、洗涤管道、料浆管道、压缩空气管道、洗涤液收集罐,洗涤管道上连接有洗涤酸管、洗涤水管；压榨水管道上安装有压榨水箱、气动球阀、压力变送器、第一隔膜压力表；料浆管道上安装有进料泵、气动球阀、第二隔膜压力表；压缩空气管道上安装有气动球阀。采用装置的洗涤方法包括以下步骤：将浸钴残渣料浆输送到隔膜压滤机中；依次将洗酸、清水、碱水泵入到隔膜压滤机中,并分别对洗后废液收集。本发明能够降低洗水的单耗及设备电耗、改善车间环境。(The invention discloses a cobalt leaching residue countercurrent washing device which comprises a diaphragm filter press, and a pressing water pipeline, a washing pipeline, a slurry pipeline, a compressed air pipeline and a washing liquid collecting tank which are respectively connected with the diaphragm filter press, wherein a washing acid pipe and a washing water pipe are connected to the washing pipeline; a squeezing water tank, a pneumatic ball valve, a pressure transmitter and a first diaphragm pressure gauge are arranged on the squeezing water pipeline; a feed pump, a pneumatic ball valve and a second diaphragm pressure gauge are arranged on the slurry pipeline; the compressed air pipeline is provided with a pneumatic ball valve. The washing method using the device comprises the following steps: conveying the residue slurry after cobalt leaching to a membrane filter press; pumping the washing acid, the clear water and the alkaline water into a membrane filter press in sequence, and collecting the washed waste liquid respectively. The invention can reduce the unit consumption of washing water and the power consumption of equipment and improve the workshop environment.)

1. The device is characterized by comprising a membrane filter press (1), and a water squeezing pipeline (2), a washing pipeline (3), a slurry pipeline (4), a compressed air pipeline (5) and a washing liquid collecting tank which are respectively connected with the membrane filter press (1), wherein one end of the washing pipeline (3) is connected with a pump, a pneumatic ball valve is installed on the washing pipeline (3), a washing acid pipe (6) and a washing water pipe (7) are connected on the washing pipeline (3) between the pneumatic ball valve installed on the washing pipeline (3) and the membrane filter press (1), one end of the washing acid pipe (6) is connected with the pump, one end of the washing water pipe (7) is connected with the pump, and the pneumatic ball valves are installed on the washing acid pipe (6) and the washing water pipe (7); a squeezing water tank (9), a pneumatic ball valve, a pressure transmitter (10) and a first diaphragm pressure gauge (11) are sequentially arranged on the squeezing water pipeline (2), and the first diaphragm pressure gauge (11) is close to the diaphragm filter press (1); a feed pump (13), a pneumatic ball valve and a second diaphragm pressure gauge (12) are sequentially arranged on the slurry pipeline (4), and the second diaphragm pressure gauge (12) is close to the diaphragm pressure filter (1); a pneumatic ball valve is arranged on the compressed air pipeline (5).

2. The apparatus for counter-current washing of cobalt leaching residues according to claim 1, characterized in that the membrane filter press (1) is connected with a washing liquid collection pipe (21); the cleaning solution collecting tank comprises a washed waste acid collecting tank (27), a washed waste water collecting tank (25) and a washed waste alkali collecting tank (8), the washed waste acid collecting tank (27) is connected with the cleaning solution collecting pipe (21) through a washed waste acid collecting pipeline, and a pneumatic ball valve is mounted on the washed waste acid collecting pipeline; the washed wastewater collection tank (25) is connected with the washing liquid collection pipe (21) through a washed wastewater collection pipeline, and a pneumatic ball valve is arranged on the washed wastewater collection pipeline; the washed alkali waste collection tank (8) is connected with the washing liquid collection pipe (21) through a washed alkali waste collection pipeline, and a pneumatic ball valve is arranged on the washed alkali waste collection pipeline.

3. The cobalt leaching residue countercurrent washing device as defined in claim 2, wherein a filtrate removal pipeline (22) is connected to the washing liquid collecting pipe (21), and a pneumatic ball valve is installed on the filtrate removal pipeline (22).

4. The counter-current washing device for the cobalt leaching residues as claimed in claim 1, wherein the membrane filter press (1) is connected with a leaked liquid recovery pipeline (23) and a blind liquid outlet pipeline (24), a liquid outlet valve is installed on the leaked liquid recovery pipeline (23), and a liquid outlet valve is installed on the blind liquid outlet pipeline (24).

5. The cobalt leaching residue countercurrent washing device according to claim 2, wherein the washed spent acid collection tank (27) is equipped with a liquid level controller, the washed waste water collection tank (25) is equipped with a liquid level controller, and the washed spent caustic collection tank (8) is equipped with a liquid level controller.

6. The cobalt leaching residue countercurrent washing device according to claim 1, characterized in that a return pipe (26) is connected to the slurry pipe (4) between the pneumatic ball valve installed on the slurry pipe (4) and the membrane filter press (1), and the pneumatic ball valve is installed on the return pipe (26).

7. The cobalt leaching residue countercurrent washing device as claimed in claim 1, 3 or 6, wherein the power source gas for opening and closing the pneumatic ball valve is purified by a purification system, the purification system comprises a purification pipeline 14, a pneumatic actuator 15, a filter 16 and a cold dryer 17 are sequentially installed on the purification pipeline 14, one end of the purification pipeline 14 is connected with a valve instrument gas storage tank 18, and the cold dryer 17 is close to the valve instrument gas storage tank 18; the valve instrument air storage tank 18 is provided with a pressure gauge 19 and an emptying pipeline 20.

8. The cobalt leaching residue countercurrent washing device as defined in claim 7, wherein a manual ball valve is installed at the bottom of the valve instrument gas storage tank (18); the emptying pipeline (20) comprises a first pipeline and a second pipeline, one end of the first pipeline is connected with the valve instrument air storage tank (18), the first pipeline is provided with a safety valve, one end of the second pipeline is connected with the valve instrument air storage tank (18), and the second pipeline is provided with a manual ball valve.

9. A washing method based on the countercurrent washing device for the cobalt leaching residues of any one of claims 1-6, characterized in that the method comprises the following steps:

step (I): conveying the residue slurry after cobalt leaching into a membrane filter press through a slurry pipeline;

step (II): opening a pump connected with a washing acid pipe and a pneumatic ball valve arranged on the washing acid pipe, and pumping the washing acid with the pH of 1.5-2.0 and the temperature of 80-85 ℃ into a membrane filter press to obtain washed waste acid; conveying the washed waste acid into a washed waste acid collecting tank through a washing liquid collecting pipe and a washed waste acid collecting pipeline;

step (three): closing a pump connected with a washing acid pipe and a pneumatic ball valve arranged on the washing acid pipe, opening the pump connected with the washing water pipe and the pneumatic ball valve arranged on the washing water pipe, and pumping washing water with the temperature of 80-85 ℃ into a membrane filter press to obtain washed wastewater; conveying the washed wastewater into a washed wastewater collection tank through a washing liquid collection pipe and a washed wastewater collection pipeline;

step (IV): closing a pump connected with a washing water pipe and a pneumatic ball valve arranged on the washing water pipe, opening the pump connected with a washing pipeline and the pneumatic ball valve arranged on the washing pipeline, and pumping alkaline water with the pH of 8.0-8.5 into a membrane filter press to obtain washed waste alkali; and conveying the washed waste alkali to a washed waste alkali collecting tank through a washing liquid collecting pipe and a washed waste alkali collecting pipeline.

Technical Field

The invention belongs to the technical field of washing devices and processes, and particularly relates to a cobalt leaching residue countercurrent washing device and a cobalt leaching residue countercurrent washing method.

Background

The current washing process mainly comprises modes of discontinuous countercurrent washing, multi-stage continuous countercurrent washing, dense continuous countercurrent washing and the like; according to the washing liquid, the method mainly comprises acid washing, water washing and hot water washing, wherein the acid washing and the water washing mainly aim at recovering valuable metals in the tailings, and the alkali washing mainly aims at fixing toxic elements in the tailings so as to ensure that the tailings reach the standard and are discharged. The above three washing methods mainly have the following problems: the used equipment is more; the occupied area is large; the production efficiency is low; higher cost and the like.

Disclosure of Invention

Aiming at the problems of longer and fussy washing process flow, more used equipment, high labor intensity and low production efficiency in the prior art, the invention provides the cobalt-leaching residue countercurrent washing device and the washing method, which have the advantages of shortened washing process flow, reduced labor intensity, improved production efficiency, reduced unit consumption of washing water and equipment power consumption and improved workshop environment.

The invention adopts the following technical scheme:

the device is characterized by comprising a membrane filter press (1), and a water squeezing pipeline (2), a washing pipeline (3), a slurry pipeline (4), a compressed air pipeline (5) and a washing liquid collecting tank which are respectively connected with the membrane filter press (1), wherein one end of the washing pipeline (3) is connected with a pump, a pneumatic ball valve is installed on the washing pipeline (3), a washing acid pipe (6) and a washing water pipe (7) are connected on the washing pipeline (3) between the pneumatic ball valve installed on the washing pipeline (3) and the membrane filter press (1), one end of the washing acid pipe (6) is connected with the pump, one end of the washing water pipe (7) is connected with the pump, and the pneumatic ball valves are installed on the washing acid pipe (6) and the washing water pipe (7); a squeezing water tank (9), a pneumatic ball valve, a pressure transmitter (10) and a first diaphragm pressure gauge (11) are sequentially arranged on the squeezing water pipeline (2), and the first diaphragm pressure gauge (11) is close to the diaphragm filter press (1); a feed pump (13), a pneumatic ball valve and a second diaphragm pressure gauge (12) are sequentially arranged on the slurry pipeline (4), and the second diaphragm pressure gauge (12) is close to the diaphragm pressure filter (1); a pneumatic ball valve is arranged on the compressed air pipeline (5).

The cobalt leaching residue countercurrent washing device is characterized in that the membrane filter press (1) is connected with a washing liquid collecting pipe (21); the cleaning solution collecting tank comprises a washed waste acid collecting tank (27), a washed waste water collecting tank (25) and a washed waste alkali collecting tank (8), the washed waste acid collecting tank (27) is connected with the cleaning solution collecting pipe (21) through a washed waste acid collecting pipeline, and a pneumatic ball valve is mounted on the washed waste acid collecting pipeline; the washed wastewater collection tank (25) is connected with the washing liquid collection pipe (21) through a washed wastewater collection pipeline, and a pneumatic ball valve is arranged on the washed wastewater collection pipeline; the washed alkali waste collection tank (8) is connected with the washing liquid collection pipe (21) through a washed alkali waste collection pipeline, and a pneumatic ball valve is arranged on the washed alkali waste collection pipeline.

The cobalt leaching residue countercurrent washing device is characterized in that a filtrate removal pipeline (22) is connected to the washing liquid collecting pipe (21), and a pneumatic ball valve is mounted on the filtrate removal pipeline (22).

The cobalt leaching residue countercurrent washing device is characterized in that the membrane filter press (1) is connected with a leakage recovery pipeline (23) and a dark current liquid outlet pipeline (24), a liquid outlet valve is installed on the leakage recovery pipeline (23), and a liquid outlet valve is installed on the dark current liquid outlet pipeline (24).

The cobalt leaching residue countercurrent washing device is characterized in that a liquid level controller is installed on the washed waste acid collecting tank (27), a liquid level controller is installed on the washed waste water collecting tank (25), and a liquid level controller is installed on the washed waste alkali collecting tank (8).

The cobalt leaching residue countercurrent washing device is characterized in that a material return pipeline (26) is connected to the slurry pipeline (4) between a pneumatic ball valve arranged on the slurry pipeline (4) and the membrane filter press (1), and the pneumatic ball valve is arranged on the material return pipeline (26).

The cobalt leaching residue countercurrent washing device is characterized in that power source gas which is opened and closed by the pneumatic ball valve is purified by a purification system, the purification system comprises a purification pipeline 14, a pneumatic actuator 15, a filter 16 and a cold dryer 17 are sequentially installed on the purification pipeline 14, one end of the purification pipeline 14 is connected with a valve instrument gas storage tank 18, and the cold dryer 17 is close to the valve instrument gas storage tank 18; the valve instrument air storage tank 18 is provided with a pressure gauge 19 and an emptying pipeline 20.

The device for washing the cobalt leaching residue in the countercurrent manner is characterized in that a manual ball valve is mounted at the bottom of the valve instrument gas storage tank (18); the emptying pipeline (20) comprises a first pipeline and a second pipeline, one end of the first pipeline is connected with the valve instrument air storage tank (18), the first pipeline is provided with a safety valve, one end of the second pipeline is connected with the valve instrument air storage tank (18), and the second pipeline is provided with a manual ball valve.

The washing method based on the cobalt leaching residue countercurrent washing device is characterized by comprising the following steps:

step (I): conveying the residue slurry after cobalt leaching into a membrane filter press through a slurry pipeline;

step (II): opening a pump connected with a washing acid pipe and a pneumatic ball valve arranged on the washing acid pipe, and pumping the washing acid with the pH of 1.5-2.0 and the temperature of 80-85 ℃ into a membrane filter press to obtain washed waste acid; conveying the washed waste acid into a washed waste acid collecting tank through a washing liquid collecting pipe and a washed waste acid collecting pipeline;

step (three): closing a pump connected with a washing acid pipe and a pneumatic ball valve arranged on the washing acid pipe, opening the pump connected with the washing water pipe and the pneumatic ball valve arranged on the washing water pipe, and pumping washing water with the temperature of 80-85 ℃ into a membrane filter press to obtain washed wastewater; conveying the washed wastewater into a washed wastewater collection tank through a washing liquid collection pipe and a washed wastewater collection pipeline;

step (IV): closing a pump connected with a washing water pipe and a pneumatic ball valve arranged on the washing water pipe, opening the pump connected with a washing pipeline and the pneumatic ball valve arranged on the washing pipeline, and pumping alkaline water with the pH of 8.0-8.5 into a membrane filter press to obtain washed waste alkali; and conveying the washed waste alkali to a washed waste alkali collecting tank through a washing liquid collecting pipe and a washed waste alkali collecting pipeline.

The invention has the beneficial technical effects that: the acid washing, hot clear water, alkali washing, squeezing, angle blowing discharging and other procedures in the membrane filter press can be automatically controlled by programs, the membrane filter press is suitable for residue washing of different raw materials, and whether the washing is qualified or not can be automatically judged by the pH and the temperature of washing water; the feeding of the membrane filter press can be accurately controlled, so that the damage of equipment caused by too fast or too slow feeding is avoided; the whole process adopts automatic control, and the materials are conveyed through a pipeline, so that the risk that foreign matters are introduced due to the contact of the materials and the outside is avoided. The invention can shorten the washing process flow and is convenient for production management; the automation degree of the whole production process is high, the labor intensity is reduced, and the production efficiency is improved; the whole process of washing water is circulated in a closed loop, so that the unit consumption of washing water is reduced; the using amount of equipment is greatly reduced, and the power consumption of the equipment is reduced; and the chamber type filter press is eliminated, so that the workshop environment can be improved. The method can ensure that all indexes of the scrap slag meet the environmental-friendly emission standard.

Drawings

FIG. 1 is a schematic diagram of the apparatus of the present invention;

FIG. 2 is a schematic view showing the construction of the purification system of the present invention.

Detailed Description

Referring to fig. 1, the cobalt leaching residue countercurrent washing device comprises a membrane filter press 1, and a pressing water pipeline 2, a washing pipeline 3, a slurry pipeline 4, a compressed air pipeline 5 and a washing liquid collecting tank which are respectively connected with the membrane filter press 1, wherein the membrane filter press 1 is an external ear type membrane filter press. One end of the washing pipeline 3 is connected with a pump, the pump connected with the washing pipeline 3 is connected with an alkaline water storage tank, a pneumatic ball valve is arranged on the washing pipeline 3, a washing acid pipe 6 and a washing water pipe 7 are connected on the washing pipeline 3 between the pneumatic ball valve arranged on the washing pipeline 3 and the membrane filter press 1, one end of the washing acid pipe 6 is connected with the pump, and the pump connected with the washing acid pipe 6 is connected with the washing acid storage tank. One end of the washing water pipe 7 is connected with a pump, and the pump connected with the washing water pipe 7 is connected with a washing water storage tank. Pneumatic ball valves are arranged on the washing acid pipe 6 and the washing water pipe 7. The squeezing water pipeline 2 is connected with the clean water tank, a squeezing water tank 9, a pneumatic ball valve, a pressure transmitter 10 and a first diaphragm pressure gauge 11 are sequentially arranged on the squeezing water pipeline 2, and the first diaphragm pressure gauge 11 is close to the diaphragm pressure filter 1. One end of a slurry pipeline 4 is connected with a slurry pool, a feed pump 13, a pneumatic ball valve and a second diaphragm pressure gauge 12 are sequentially arranged on the slurry pipeline 4, and the second diaphragm pressure gauge 12 is close to the diaphragm pressure filter 1; a material return pipeline 26 is connected to the slurry pipeline 4 between the pneumatic ball valve arranged on the slurry pipeline 4 and the membrane filter press 1, a pneumatic ball valve is arranged on the material return pipeline 26, and the material return pipeline 26 is connected with the slurry pond. The compressed air pipeline 5 is provided with a pneumatic ball valve, and the compressed air pipeline 5 is connected with an air blowing and storing tank 28. The membrane filter press 1 is connected with a washing liquid collecting pipe 21; the cleaning solution collecting tank comprises a cleaned waste acid collecting tank 27, a cleaned waste water collecting tank 25 and a cleaned waste alkali collecting tank 8, the cleaned waste acid collecting tank 27 is connected with the cleaning solution collecting pipe 21 through a cleaned waste acid collecting pipeline, and a pneumatic ball valve is mounted on the cleaned waste acid collecting pipeline; the washed wastewater collecting tank 25 is connected with the washing liquid collecting pipe 21 through a washed wastewater collecting pipeline, and a pneumatic ball valve is arranged on the washed wastewater collecting pipeline; the washed alkali waste collecting tank 8 is connected with the washing liquid collecting pipe 21 through a washed alkali waste collecting pipeline, and a pneumatic ball valve is arranged on the washed alkali waste collecting pipeline. The washing liquid collecting pipe 21 is connected with a filtrate removing pipeline 22, and the filtrate removing pipeline 22 is provided with a pneumatic ball valve. The filtrate removal line 22 is connected to the filtrate removal tank. The membrane filter press 1 is connected with a leakage recovery pipeline 23 and a dark flow liquid outlet pipeline 24, a liquid outlet valve is arranged on the leakage recovery pipeline 23, and a liquid outlet valve is arranged on the dark flow liquid outlet pipeline 24. The waste acid collecting tank 27 after washing is provided with a liquid level controller, the waste water collecting tank 25 after washing is provided with a liquid level controller, and the waste alkali collecting tank 8 after washing is provided with a liquid level controller. The washed waste acid collecting pipeline, the washed waste water collecting pipeline and the washed waste alkali collecting pipeline are all made of stainless steel, the pipe diameters are DN100, and the pressure resistance is 16 kg.

Referring to fig. 2, all power sources for opening and closing the pneumatic ball valves in the device are provided by a valve instrument air storage tank 18, the pressure of the power sources is 0.5-0.7 MPa, gas in the valve instrument air storage tank 18 is purified by a purification system, the purification system comprises a purification pipeline 14, and the purification pipeline 14 is made of stainless steel, has the pipe diameter of DN50 and is pressure-resistant to 16 kg. A pneumatic actuator 15, a filter 16 and a cold dryer 17 are sequentially arranged on the purifying pipeline 14, one end of the purifying pipeline 14 is connected with a compressed air storage tank before purification, the other end of the purifying pipeline 14 is connected with a valve instrument air storage tank 18, and the cold dryer 17 is close to the valve instrument air storage tank 18; the valve instrument air storage tank 18 is provided with a pressure gauge 19 and an emptying pipeline 20. The bottom of the valve instrument air storage tank 18 is provided with a manual ball valve; the emptying pipeline 20 comprises a first pipeline and a second pipeline, one end of the first pipeline is connected with the valve instrument air storage tank 18, the first pipeline is provided with a safety valve, one end of the second pipeline is connected with the valve instrument air storage tank 18, and the second pipeline is provided with a manual ball valve. The other end of the first pipeline and the other end of the second pipeline are both connected with an emptying pool. The material of the squeezing water pipeline 2, the material of the washing pipeline 3, the material return pipeline 26, the material of the slurry pipeline 4 and the material of the compressed air pipeline 5 are all stainless steel, the pipe diameters of the squeezing water pipeline 2 and the material of the washing pipeline 3 are DN50, the pressure resistance is 16kg, the pipe diameter of the material return pipeline 26 is DN80, the pressure resistance is 16kg, and the pipe diameter of the material slurry pipeline 4 is DN100, the pressure resistance is 16 kg.

The washing method of the cobalt leaching residue countercurrent washing device comprises the following steps: step (I): the cobalt-leaching residue slurry is conveyed to a membrane filter press 1 through a slurry pipeline 4. And (4) after the cobalt-leaching residue slurry is fed, taking the filtrate as mother liquor water as raw material slurrying water, and recovering valuable metals in the mother liquor water. Step (II): opening a pump connected with the washing acid pipe 6 and a pneumatic ball valve arranged on the washing acid pipe 6, adjusting the pH value of the washing acid to 1.5-2.0 and the temperature to 80-85 ℃ in an acid adjusting tank, and pumping the washing acid into the membrane filter press 1 by using a washing pump to obtain washed waste acid; and conveying the washed waste acid into a washed waste acid collecting tank 27 through a washing liquid collecting pipe 21 and a washed waste acid collecting pipeline. And (4) taking the waste acid after washing as primary water, and enabling the primary water to enter a primary water storage tank, wherein the primary water is used for slurrying the cobalt-leaching residue. Step (three): closing the pump connected with the washing acid pipe 6 and the pneumatic ball valve arranged on the washing acid pipe 6, opening the pump connected with the washing water pipe 7 and the pneumatic ball valve arranged on the washing water pipe 7, and pumping the clean water with the temperature of 80-85 ℃ into the membrane filter press 1 through the washing pump to obtain the washed wastewater; and the washed wastewater is conveyed into a washed wastewater collection tank 25 through a washing liquid collection pipe 21 and a washed wastewater collection pipeline. And (4) the waste water after washing is secondary water, the secondary water enters a secondary water tank, and the secondary water is used for primary left acid washing after acid regulation. Step (IV): closing a pump connected with a washing water pipe 7 and a pneumatic ball valve arranged on the washing water pipe 7, opening a pump connected with a washing pipeline 3 and a pneumatic ball valve arranged on the washing pipeline 3, and pumping alkaline water with the pH of 8.0-8.5 into a membrane filter press 1 by using a washing pump to obtain washed waste alkali; and the washed waste alkali is conveyed to the washed waste alkali collecting tank 8 through the washing liquid collecting pipe 21 and the washed waste alkali collecting pipeline. And (3) feeding the washed waste alkali into an alkaline water circulating tank, and pumping the waste alkali into a filter press through an alkaline water pump for recycling. And (4) carrying out back flushing, squeezing, angle blowing and discharging after alkali washing.