CN106186117B - Treatment device and treatment method for mud-containing acid water - Google Patents
Treatment device and treatment method for mud-containing acid water Download PDFInfo
- Publication number
- CN106186117B CN106186117B CN201610738606.4A CN201610738606A CN106186117B CN 106186117 B CN106186117 B CN 106186117B CN 201610738606 A CN201610738606 A CN 201610738606A CN 106186117 B CN106186117 B CN 106186117B
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- tower
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- mud
- turbulent flushing
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- 239000002253 acid Substances 0.000 title claims abstract description 69
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000011010 flushing procedure Methods 0.000 claims abstract description 82
- 238000001816 cooling Methods 0.000 claims abstract description 74
- 239000007788 liquid Substances 0.000 claims abstract description 48
- 239000002002 slurry Substances 0.000 claims abstract description 38
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000003546 flue gas Substances 0.000 claims abstract description 16
- 238000003825 pressing Methods 0.000 claims abstract description 12
- 239000010802 sludge Substances 0.000 claims description 18
- 238000004062 sedimentation Methods 0.000 claims description 9
- 238000004064 recycling Methods 0.000 claims description 7
- 239000013505 freshwater Substances 0.000 claims description 5
- 229920006395 saturated elastomer Polymers 0.000 claims description 3
- 239000013049 sediment Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 abstract description 9
- 238000000746 purification Methods 0.000 abstract description 8
- 239000006228 supernatant Substances 0.000 abstract description 6
- 230000008021 deposition Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 239000000428 dust Substances 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 abstract description 2
- 238000005406 washing Methods 0.000 description 5
- 238000003723 Smelting Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000011260 aqueous acid Substances 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
Abstract
The invention discloses a treatment device and a treatment method for mud-containing acid water, which are used for solving the problems that the existing treatment device has higher solid content of supernatant fluid and is easy to cause acid mud deposition. The treatment device comprises a turbulent flushing tower, a cooling tower, a clear liquid tank, a cooling tower slurry pump, a turbulent flushing tower slurry pump and a plate-and-frame filter press, wherein the turbulent flushing tower, the cooling tower and the clear liquid tank are communicated, the outlet end of the cooling tower is connected with the turbulent flushing tower through the cooling tower slurry pump, one way of the outlet end of the turbulent flushing tower is connected with the plate-and-frame filter press through the turbulent flushing tower slurry pump, the outlet end of the plate-and-frame filter press is connected with the clear liquid tank, and the other way of the outlet end of the turbulent flushing tower is returned to the turbulent flushing tower through the turbulent flushing tower slurry pump. The method has the advantages of simple operation, less investment and low energy consumption, realizes the continuous mud removal of the mud-containing acid water in the purification process, avoids the deposition of the acid mud in each purification tower, and is beneficial to improving the cooling and dust removal effects of the flue gas because the solid content of clear liquid formed by the mud-containing acid water after filter pressing treatment is less than 0.05 g/l.
Description
Technical Field
The invention belongs to the field of sewage or sludge treatment, and particularly relates to a treatment device and a treatment method for acid water containing sludge.
Background
Ash in the flue gas of the smelting flue gas acid making system is continuously brought into the circulating washing acid in the wet washing process, so that the solid content in the circulating acid is gradually increased, and the washing cooling effect of the flue gas is affected.
The traditional mud acid-containing water treatment process is that mud acid-containing water is subjected to sedimentation or thickening treatment, a part of supernatant enters a deep arsenic removal system, a part of supernatant returns to a wet purification process for recycling, the settled or concentrated mud acid-containing water is collected into a concentrated solution tank and is sent into a filter press by a mud pump for press filtration intermittently, a filter cake formed by press filtration is recovered, and the supernatant returns to the system for recycling. Because the solid content of the supernatant is higher, acid mud is easy to deposit in a turbulent flushing tower and a cooling tower, a spray head and a plate heat exchanger in the tower are blocked, and the washing, cooling and dust removing effects of flue gas are affected.
Disclosure of Invention
The invention aims to provide a treatment device for acid water containing mud, which aims to solve the problems that the existing treatment device has higher solid content of supernatant fluid and is easy to cause acid mud deposition.
Another object of the present invention is to provide a method for treating an aqueous acid containing mud.
In order to achieve the above purpose, the present invention adopts the following technical scheme: the device comprises a turbulent flushing tower, a cooling tower, a clear liquid tank, a cooling tower slurry pump, a turbulent flushing tower slurry pump and a plate-and-frame filter press, wherein the turbulent flushing tower, the cooling tower and the clear liquid tank are communicated, the outlet end of the cooling tower is connected with the turbulent flushing tower through the cooling tower slurry pump, one path of the outlet end of the turbulent flushing tower is connected with the plate-and-frame filter press through the turbulent flushing tower slurry pump, the outlet end of the plate-and-frame filter press is connected with the clear liquid tank, and the other path of the outlet end of the turbulent flushing tower is returned to the turbulent flushing tower through the turbulent flushing tower slurry pump.
As a further improvement of the invention, a turbulent tower sloping plate with an inclined angle of 15-45 degrees is arranged at the bottom of the turbulent tower, and the lowest point of the turbulent tower sloping plate is connected with a turbulent tower slurry pump.
As a further improvement of the invention, a cooling tower sloping plate with an inclination angle of 15-45 degrees is arranged at the bottom of the cooling tower, and the lowest point of the cooling tower sloping plate is connected with a cooling tower slurry pump.
The method for treating the mud acid-containing water by using the mud acid-containing water treatment device is characterized by comprising the following steps of:
A. fresh water is supplemented into the clear liquid tank 8, the cooling tower 5 and the turbulent flushing tower 1, and the filter press 7 enters a pressure maintaining state;
B. before the system is introduced into the flue gas, a cooling tower slurry pump 4 is started, the mud acid water in a cooling tower 5 is sent to the highest point of a turbulent flushing tower sloping plate 2, and the dynamic disturbance is carried out on the acid water sedimentation process in the turbulent flushing tower;
C. then the turbulent flushing tower slurry pump 3 is started, and the mud acid water in the turbulent flushing tower is sent to the plate-and-frame filter press 7;
D. the clear liquid formed after the filter pressing automatically flows to a clear liquid tank 8 and is communicated with the liquid level of the cooling tower for recycling;
E. when the plate-and-frame filter press 7 is saturated, the acid sludge in the turbulent flushing tower 1 is returned to the highest point of the inclined plate 2 of the turbulent flushing tower by switching the outlet valve of the slurry pump 3 of the turbulent flushing tower, so that sediment is avoided in the process of discharging sludge by the plate-and-frame filter press.
The invention provides a treatment device for mud-containing acid water in a wet purification process of a smelting flue gas acid making system, which omits the traditional acid water concentration and degassing process, has the advantages of short flow, simple operation, less investment and low energy consumption, realizes continuous mud removal of mud-containing acid water in the purification process, avoids the deposition of acid mud in each tower, ensures that the solid content of clear liquid formed by filter pressing treatment of mud-containing acid water is less than 0.05g/l, effectively solves the problem of frequent blockage of each tower and equipment in purification, and is beneficial to improving the cooling and dust removal effects of flue gas.
Drawings
FIG. 1 is a flow chart of the process of the device of the present invention.
In the figure, a 1-turbulent tower; 2-turbulent tower sloping plates; 3-turbulent tower slurry pump; 4-a cooling tower slurry pump; 5-a cooling tower; 6-a cooling tower sloping plate; 7-a plate-and-frame filter press; 8-a clear liquid tank; 9-communicating pipes between the cooling tower and the turbulent flushing tower; 10-communicating pipe between the liquid tank and the cooling tower.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
The utility model provides a contain processing apparatus of mud acid water, including turbulent wash tower 1, cooling tower 5, clear solution groove 8, cooling tower slush pump 4, turbulent wash tower slush pump 3, plate and frame filter press 7, turbulent wash tower 1, cooling tower 5 and clear solution groove 8 intercommunication, the exit end of cooling tower 5 links to each other with turbulent wash tower 1 through cooling tower slush pump 4, the exit end of turbulent wash tower 1 links to each other with plate and frame filter press 7 through turbulent wash tower slush pump 3 all the way, the exit end of plate and frame filter press 7 links to each other with clear solution groove 8, the exit end of turbulent wash tower 1 is another to return turbulent wash tower 1 through turbulent wash tower slush pump 3.
The bottom of the turbulent tower 1 is provided with a turbulent tower sloping plate 2 with an inclined angle of 15-45 degrees, and the outlet end at the lowest point of the turbulent tower sloping plate 2 is connected with a turbulent tower slurry pump 3.
A cooling tower sloping plate 6 with an inclination angle of 15-45 degrees is arranged at the bottom of the cooling tower 5, and an outlet at the lowest point of the cooling tower sloping plate 6 is connected with a cooling tower mud pump 4.
The method for treating the mud-containing acid water by the treatment device for the mud-containing acid water comprises the following steps:
A. fresh water is supplemented into the clear liquid tank 8, the cooling tower 5 and the turbulent flushing tower 1, and the filter press 7 enters a pressure maintaining state;
B. before the system is introduced into the flue gas, a cooling tower slurry pump 4 is started, the mud acid water in a cooling tower 5 is sent to the highest point of a turbulent flushing tower sloping plate 2, and the dynamic disturbance is carried out on the acid water sedimentation process in the turbulent flushing tower;
C. then the turbulent flushing tower slurry pump 3 is started, and the mud acid water in the turbulent flushing tower is sent to the plate-and-frame filter press 7;
D. the clear liquid formed after the filter pressing automatically flows to a clear liquid tank 8 and is communicated with the liquid level of the cooling tower for recycling;
E. when the plate-and-frame filter press 7 is saturated, the acid sludge in the turbulent flushing tower 1 is returned to the highest point of the inclined plate 2 of the turbulent flushing tower by switching the outlet valve of the slurry pump 3 of the turbulent flushing tower, so that sediment is avoided in the process of discharging sludge by the plate-and-frame filter press.
According to the invention, by utilizing the inclined plate 6 in the cooling tower 5, acid sludge in the cooling tower 5 is concentrated at the lowest point of the inclined plate 6 of the cooling tower, and the cooling tower mud pump 4 is used for conveying the acid sludge water in the cooling tower to the highest point of the inclined plate 2 of the turbulent flushing tower, so that the power disturbance is carried out on the sedimentation process of the acid sludge water in the turbulent flushing tower, and the sedimentation of the acid sludge in the tower is avoided.
The acid sludge in the turbulent flushing tower 1 is concentrated at the lowest point of the turbulent flushing tower sloping plate 2 by utilizing the turbulent flushing tower sloping plate 2, and is continuously and directly sent to a plate-and-frame filter press 7 by using a turbulent flushing tower slurry pump 3, clear liquid formed after filter pressing automatically flows into a clear liquid tank 8, and acid water in the clear liquid tank 8 is communicated with the liquid level in the cooling tower through a clear liquid tank and a cooling tower communicating pipe 10 to be used as circulating washing water; the acid water in the cooling tower 5 is communicated with the liquid level in the turbulent flushing tower through a cooling tower and turbulent flushing tower communicating pipe 9. The flowing direction of the mud acid water in the system is a cooling tower 5, a turbulent flushing tower 1 and a plate-and-frame filter press 7, the flowing direction of the clear liquid is the plate-and-frame filter press 7, a clear liquid tank 8, the cooling tower 5 and the turbulent flushing tower 1, and no liquid mixing exists between the mud acid water and the clear liquid. The solid content in the clear liquid is below 0.05 g/l.
Example 1:
fresh water is supplemented into the clear liquid tank 8, the cooling tower 5 and the turbulent flushing tower 1 until the liquid level of three devices is 1.6m, the pressing button of the plate-and-frame filter press 7 is pressed, and the filter press enters a pressure maintaining state. Before the system is introduced into the flue gas, a cooling tower slurry pump 4 is started, and the flow is 20m 3 Sending the mud acid water in the cooling tower 5 to the highest point of the turbulent flushing tower sloping plate 2, and performing dynamic disturbance on the acid water sedimentation process in the turbulent flushing tower; then the turbulent flushing tower slurry pump 3 is started, and the flow is 30m 3 And/h, conveying the mud acid water in the turbulent flushing tower to a plate-and-frame filter press, and introducing the flue gas into a flue gas acid making wet purification process. The solid content of the clear liquid formed after the filter pressing is 0.038g/l, and the clear liquid flows to a clear liquid tank from the filter pressing and is communicated with the liquid level of the cooling tower for recycling. With the gradual saturation of the plate-and-frame filter press, when the inlet flowmeter of the filter press shows 0, the outlet valve of the slurry pump of the turbulent flushing tower is switched, the acid water in the turbulent flushing tower returns to the highest point of the inclined plate of the turbulent flushing tower, so that the acid mud in the turbulent flushing tower is prevented from settling down in the mud unloading process of the filter press, and then the button of the filter press is pressed down to loosen the mud. After the sludge discharge is finished, the filter press is reset, and the treatment process of the acid water containing the sludge is started again.
Example 2:
fresh water is supplemented into the clear liquid tank 8, the cooling tower 5 and the turbulent flushing tower 1 until the liquid level of three devices is 1.6m, the pressing button of the plate-and-frame filter press 7 is pressed, and the filter press enters a pressure maintaining state. Before the system is introduced into the flue gas, a cooling tower slurry pump 4 is started, and the flow is 20m 3 Delivering the mud acid water in the cooling tower 5 to the highest point of the inclined plate 2 of the turbulent flushing tower to treat the acid in the turbulent flushing towerCarrying out dynamic disturbance in the water sedimentation process; then the turbulent flushing tower slurry pump 3 is started, and the flow is 30m 3 And/h, conveying the mud acid water in the turbulent flushing tower to a plate-and-frame filter press, and introducing the flue gas into a flue gas acid making wet purification process. The solid content of the clear liquid formed after the filter pressing is 0.038g/l, and the clear liquid flows to a clear liquid tank from the filter pressing and is communicated with the liquid level of the cooling tower for recycling. With the gradual saturation of the plate-and-frame filter press, when the inlet flowmeter of the filter press shows 0, the outlet valve of the slurry pump of the turbulent flushing tower is switched, the acid water in the turbulent flushing tower returns to the highest point of the inclined plate of the turbulent flushing tower, so that the acid mud in the turbulent flushing tower is prevented from settling down in the mud unloading process of the filter press, and then the button of the filter press is pressed down to loosen the mud. After the sludge discharge is finished, the filter press is reset, and the treatment process of the acid water containing the sludge is started again.
Claims (3)
1. A treatment device of mud-containing acid water, which is characterized in that: the device comprises a turbulent flushing tower (1), a cooling tower (5), a clear liquid tank (8), a cooling tower slurry pump (4), a turbulent flushing tower slurry pump (3) and a plate-and-frame filter press (7), wherein the turbulent flushing tower (1), the cooling tower (5) and the clear liquid tank (8) are communicated, the outlet end of the cooling tower (5) is connected with the turbulent flushing tower (1) through the cooling tower slurry pump (4), one way of the outlet end of the turbulent flushing tower (1) is connected with the plate-and-frame filter press (7) through the turbulent flushing tower slurry pump (3), the outlet end of the plate-and-frame filter press (7) is connected with the clear liquid tank (8), and the other way of the outlet end of the turbulent flushing tower (1) is returned to the turbulent flushing tower (1) through the turbulent flushing tower slurry pump (3); a turbulent tower sloping plate (2) is arranged at the bottom of the turbulent tower (1), and the lowest point of the turbulent tower sloping plate (2) is connected with a turbulent tower slurry pump (3); a cooling tower sloping plate (6) is arranged at the bottom of the cooling tower (5), and the lowest point of the cooling tower sloping plate (6) is connected with a cooling tower slurry pump (4);
the method for treating the mud-containing acid water by using the treatment device for the mud-containing acid water comprises the following steps:
A. fresh water is supplemented into the clear liquid tank (8), the cooling tower (5) and the turbulent flushing tower (1), and the plate-and-frame filter press (7) enters a pressure maintaining state;
B. before the system is introduced into the flue gas, a slurry pump (4) of a cooling tower is started, the mud acid water in a cooling tower (5) is sent to the highest point of a sloping plate (2) of the turbulent flushing tower, and the dynamic disturbance is carried out on the acid water sedimentation process in the turbulent flushing tower;
C. then a turbulent flushing tower slurry pump (3) is started, and the mud acid water in the turbulent flushing tower is sent to a plate-and-frame filter press (7);
D. the clear liquid formed after the filter pressing automatically flows to a clear liquid tank (8) and is communicated with the liquid level of the cooling tower for recycling;
E. when the plate-and-frame filter press (7) is saturated, the acid sludge in the turbulent flushing tower (1) is returned to the highest point of the inclined plate (2) of the turbulent flushing tower by switching the outlet valve of the slurry pump (3) of the turbulent flushing tower, so that sediment is prevented from being caused by sedimentation of acid sludge in the turbulent flushing tower in the sludge unloading process of the plate-and-frame filter press.
2. The apparatus for treating a muddy acid water according to claim 1, characterized in that: the inclined angle of the turbulent tower inclined plate (2) is 15-45 degrees.
3. A treatment device for mud-containing acid water according to claim 1 or 2, characterized in that: the inclination angle of the cooling tower inclined plate (6) is 15-45 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610738606.4A CN106186117B (en) | 2016-08-29 | 2016-08-29 | Treatment device and treatment method for mud-containing acid water |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610738606.4A CN106186117B (en) | 2016-08-29 | 2016-08-29 | Treatment device and treatment method for mud-containing acid water |
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| Publication Number | Publication Date |
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| CN106186117A CN106186117A (en) | 2016-12-07 |
| CN106186117B true CN106186117B (en) | 2023-06-02 |
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| CN201610738606.4A Active CN106186117B (en) | 2016-08-29 | 2016-08-29 | Treatment device and treatment method for mud-containing acid water |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107935022A (en) * | 2017-12-08 | 2018-04-20 | 南丹县南方有色金属有限责任公司 | A kind of zinc oxide desulfurization washing system |
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Effective date of registration: 20240205 Address after: 737100 No. 2 Lanzhou Road, Beijing Road Street, Jinchuan District, Jinchang City, Gansu Province Patentee after: Jinchuan Group Nickel Cobalt Co.,Ltd. Country or region after: China Address before: 737103 No. 98, Jinchuan Road, Jinchang, Gansu Patentee before: JINCHUAN GROUP Co.,Ltd. Country or region before: China |