Two-stage desulfurization wastewater clarification and concentration tank

Abstract

The utility model discloses a two-stage desulfurization wastewater clarification and concentration tank which comprises a desulfurization wastewater tank, the desulfurization wastewater tank is connected with a filter assembly, the filter assembly is connected with a first-stage grit chamber, the first-stage grit chamber is connected with a second-stage electric flocculation tank, the second-stage electric flocculation tank is connected with a de-flocculation reaction tower, and the de-flocculation reaction tower is connected with a turbidity detection kettle. The turbidity detection kettle is connected with the pH value detection kettle, the pH value detection kettle is connected with the clarification water tank, the turbidity detection kettle is further connected with the primary grit chamber, the pH value detection kettle is further connected with the secondary electric flocculation tank, all the components are connected through water supply pipelines, each water supply pipeline is provided with an electric control water pump, and the electric control water pumps are controlled by an electric controller. The flocculation removal reaction tower is provided with a plurality of layers of ultrafiltration membranes, large flocs are removed, and then the wastewater flows into the turbidity detection kettle and the PH value detection kettle to be detected. If the turbidity or the PH value exceeds the standard, the wastewater flows back to the first-stage grit chamber or the second-stage electric flocculation tank to be treated again; and if the standard is reached, flowing into a clarification water tank.

Description

Technical Field

[0001] The utility model relates to the technical field of desulfurization wastewater treatment, in particular to a two-stage desulfurization wastewater clarification and concentration tank. Background Art

[0002] During the combustion of coal, a large amount of flue gas containing sulfur dioxide is produced, which causes serious pollution to the environment. Sulfur dioxide is a harmful gas with a strong pungent odor. It not only threatens human health, but also causes environmental problems such as acid rain. In order to reduce sulfur dioxide emissions, the wet limestone-gypsum method is widely used for desulfurization. This method removes sulfur dioxide from flue gas by reacting limestone slurry with sulfur dioxide in flue gas to produce gypsum. However, the wet limestone-gypsum method produces a large amount of desulfurization wastewater, which is characterized by high salt, high chlorine, high suspended solids and heavy metal content, and direct discharge will cause serious pollution to the environment. If the pollutants in these wastewaters are directly discharged into the environment without treatment, they will cause serious damage to water bodies, soil and ecosystems. Therefore, it is crucial to develop and adopt efficient and economical desulfurization wastewater treatment technologies. Traditional desulfurization wastewater treatment methods include physical precipitation, chemical precipitation and biological treatment, but these methods have their own limitations. Although the physical precipitation method can remove some suspended matter, it is powerless against soluble pollutants; although the chemical precipitation method can remove some heavy metals, it will produce a large amount of chemical sludge and the treatment cost is high; although the biological treatment method can degrade organic matter, it has poor adaptability to high-salt environments and the treatment efficiency is low. Utility Model Content

[0003] This application introduces the design and application of a two-stage desulfurization wastewater clarification and concentration tank. The design includes a primary grit chamber and a secondary electrocoagulation tank, which are pre-treated by coarse and fine grids to remove large floating animals and smaller particles. The primary grit chamber is used for sedimentation treatment, and the secondary electrocoagulation tank further removes suspended matter and soluble pollutants. The deflocculation reaction tower uses multi-layer ultrafiltration membrane treatment to form floc-free wastewater. After turbidity and pH value testing, qualified water is sent to the clarification tank for storage or reuse, and unqualified water is returned to the grit chamber or the secondary electrocoagulation tank for re-treatment.

[0004] A two-stage desulfurization wastewater clarification and concentration tank includes an electric controller, characterized in that it includes a desulfurization wastewater tank, the desulfurization wastewater tank is connected to a filtering component, the filtering component is connected to a primary grit tank, the primary grit tank is connected to a secondary electric flocculation tank, the secondary electric flocculation tank is connected to a deflocculation reaction tower, the deflocculation reaction tower is connected to a turbidity detection kettle, the turbidity detection kettle is connected to a pH value detection kettle, the pH value detection kettle is connected to a clarified water tank, the turbidity detection kettle is also connected to the primary grit tank, the pH value detection kettle is also connected to the secondary electric flocculation tank, the connections between the components are completed through water supply pipes, each water supply pipe is provided with an electric-controlled water pump, and the electric-controlled water pump is uniformly controlled by the electric controller.

[0005] Preferably, the desulfurization wastewater pool is connected to the preceding industry, and industrial wastewater is stored in the desulfurization wastewater pool. The industrial wastewater is pumped out by an electric-controlled water pump and flows into the filter assembly.

[0006] Preferably, the filter assembly is provided with a coarse screen and a fine screen. After the industrial wastewater flows into the filter assembly, it is pumped into the primary sand settling tank by an electric-controlled water pump. When the industrial wastewater is pumped, it will first pass through the coarse screen to intercept large floating animals in the wastewater and then pass through the fine screen to further remove smaller particles.

[0007] Preferably, the primary grit tank performs primary sedimentation treatment on the industrial wastewater after it flows in, and after the treatment is completed, it is pumped into the secondary electric flocculation tank through an electric-controlled water pump. An online mud level meter is provided in the primary grit tank, and the online mud level meter monitors the height of the sludge layer in real time to control the discharge and treatment of the sludge.

[0008] Preferably, the secondary electric flocculation tank performs flocculation treatment on the inflowing industrial wastewater, and the industrial wastewater is pumped out through a water pump after the flocculation treatment and flows into the deflocculation reaction tower.

[0009] Preferably, the deflocculation reaction tower is provided with multiple layers of ultrafiltration membranes, which utilize the sieving effect of semipermeable membranes to remove larger flocs generated by industrial wastewater after flocculation treatment. After the larger flocs are removed, the industrial wastewater is pumped out by a water pump and flows into the turbidity detection kettle.

[0010] Preferably, a turbidity detector is installed inside the turbidity detection kettle, and the turbidity detector is connected to the electric controller signal. The turbidity detector performs turbidity detection on the industrial wastewater in the turbidity detection kettle, and sends a turbidity exceeding standard signal to the electric controller when the turbidity is higher than the preset standard value. After receiving the turbidity exceeding standard signal, the electric controller starts the water pump between the turbidity detection kettle and the primary grit tank to pump the industrial wastewater into the primary grit tank. When the turbidity is lower than the preset standard value, the electric controller sends a turbidity reaching standard signal to the electric controller. After receiving the turbidity reaching standard signal, the electric controller starts the water pump between the turbidity detection kettle and the pH value detection kettle to pump the industrial wastewater into the primary pH value detection kettle.

[0011] Preferably, a pH value detector is installed inside the pH value detection kettle, and the pH value detector is connected to the electric controller signal. The pH value detector detects the pH value of the industrial wastewater in the pH value detection kettle, and sends a pH value exceeding standard signal to the electric controller when the pH value is higher than the preset standard value. After receiving the pH value exceeding standard signal, the electric controller starts the water pump between the pH value detection kettle and the secondary electric flocculation tank to pump the industrial wastewater into the secondary electric flocculation tank. When the pH value is lower than the preset standard value, the electric controller sends a pH value reaching standard signal to the electric controller. After receiving the pH value reaching standard signal, the electric controller starts the water pump between the pH value detection kettle and the pH value detection kettle to pump the industrial wastewater into the clarification tank.

[0012] Preferably, the flocculation treatment is to add polyaluminium chloride into the industrial wastewater and stir the mixture to aggregate the fine suspended particles and colloidal particles in the industrial wastewater into larger flocs.

[0013] Preferably, a polyaluminium chloride water tank (12) is provided above the secondary electric flocculation tank, and the polyaluminium chloride water tank controls the flow of polyaluminium chloride into the industrial wastewater in the secondary electric flocculation tank through an electromagnetic valve.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. Through the combined action of the primary grit chamber and the secondary electrocoagulation tank, this technology can not only effectively remove suspended solids in desulfurization wastewater, but also remove heavy metals and some soluble pollutants. The pretreatment steps of the coarse and fine screens further remove large floating animals and smaller particles, improving the efficiency and effect of subsequent treatment.

[0016] 2. The multi-layer ultrafiltration membrane technology adopted in the deflocculation reaction tower utilizes the screening effect of the semi-permeable membrane to remove suspended solids and colloidal particles of a specific particle size in a targeted manner, thereby achieving in-depth treatment of floc-free wastewater and ensuring high standards and clarity of the treated water quality.

[0017] 3. Online monitoring equipment such as mud level meter, turbidity meter and pH detector can monitor key parameters in the treatment process in real time, such as sludge layer height, turbidity and pH value. This provides data support for the intelligent control and automatic management of the system, and ensures the stability and reliability of the system operation.

[0018] 4. Through the design of the return water pump, when the turbidity or pH value of the non-flocculated wastewater is detected to be excessive, the wastewater can be returned to the grit chamber or the secondary electrocoagulation tank for reprocessing. The return step not only ensures that the wastewater that does not meet the standards is reprocessed, but also improves the treatment efficiency of the entire system and the water quality compliance rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of a two-stage desulfurization wastewater clarification and concentration tank of the utility model;

[0020] Figure 2 This is a work flow chart of a two-stage desulfurization wastewater clarification and concentration tank of the utility model.

[0021] In the figure: 1. Desulfurization wastewater tank; 2. Primary sand settling tank; 3. Secondary electric flocculation tank; 4. Deflocculation reaction tower; 5. Turbidity detection kettle; 6. pH value detection kettle; 7. Clarifying water tank; 8. Electric controller; 9. Filter component; 11. Online mud level meter; 12. Polyaluminium chloride water tank. DETAILED DESCRIPTION

[0022] A two-stage desulfurization wastewater clarification and concentration tank includes an electric controller 8, characterized in that it includes a desulfurization wastewater tank 1, the desulfurization wastewater tank 1 is connected to a filter component 9, the filter component 9 is connected to a primary grit tank 2, the primary grit tank 2 is connected to a secondary electric flocculation tank 3, the secondary electric flocculation tank 3 is connected to a deflocculation reaction tower 4, the deflocculation reaction tower 4 is connected to a turbidity detection kettle 5, the turbidity detection kettle 5 is connected to a pH value detection kettle 6, the pH value detection kettle 6 is connected to a clarification water tank 7, the turbidity detection kettle 5 is also connected to the primary grit tank 2, the pH value detection kettle 6 is also connected to the secondary electric flocculation tank 3, the connections between the components are completed through water supply pipes, each water supply pipe is provided with an electric-controlled water pump, and the electric-controlled water pump is uniformly controlled by the electric controller 8.

[0023] The desulfurization wastewater pool 1 is connected to the preceding industry. Industrial wastewater is stored in the desulfurization wastewater pool 1. The industrial wastewater is pumped out through an electric-controlled water pump and flows into the filter assembly 9.

[0024] The filter assembly is provided with a coarse screen and a fine screen. After the industrial wastewater flows into the filter assembly 9, it is pumped into the primary grit chamber 2 by an electric-controlled water pump. When the industrial wastewater is pumped, it will first pass through the coarse screen to intercept large floating animals in the wastewater, and then pass through the fine screen to further remove smaller particles.

[0025] The primary grit chamber 2 performs primary sedimentation treatment on the industrial wastewater after it flows in, and after the treatment is completed, it is pumped into the secondary electric flocculation tank 3 through an electric-controlled water pump. An online mud level meter 11 is provided in the primary grit chamber 2, and the online mud level meter 11 monitors the height of the sludge layer in real time to control the discharge and treatment of the sludge.

[0026] The secondary electric flocculation tank 3 performs flocculation treatment on the inflowing industrial wastewater. After the flocculation treatment, the industrial wastewater is pumped out through a water pump and flows into the deflocculation reaction tower 4 .

[0027] The deflocculation reaction tower 4 and the deflocculation reaction tower 12 are provided with multiple layers of ultrafiltration membranes. The ultrafiltration membranes utilize the sieving effect of semipermeable membranes to remove larger flocs produced by the industrial wastewater after the flocculation treatment. The industrial wastewater is pumped out by a water pump after the larger flocs are removed and flow into the turbidity detection kettle 5.

[0028] A turbidity detector is installed inside the turbidity detection kettle 5, and the turbidity detector is connected to the electric controller 8 by signal. The turbidity detector performs turbidity detection on the industrial wastewater in the turbidity detection kettle 5. When the turbidity is higher than the preset standard value, a turbidity exceeding standard signal is sent to the electric controller 8. After receiving the turbidity exceeding standard signal, the electric controller 8 starts the water pump between the turbidity detection kettle 5 and the primary grit tank 2 to pump the industrial wastewater into the primary grit tank 2. When the turbidity is lower than the preset standard value, a turbidity reaching standard signal is sent to the electric controller 8. After receiving the turbidity reaching standard signal, the electric controller 8 starts the water pump between the turbidity detection kettle 5 and the pH value detection kettle 6 to pump the industrial wastewater into the primary pH value detection kettle 6.

[0029] A PH value detector is installed inside the PH value detection kettle 6, and the PH value detector is connected to the electric controller 8 by signal. The PH value detector detects the PH value of the industrial wastewater in the PH value detection kettle 6. When the PH value is higher than the preset standard value, a PH value exceeding standard signal is sent to the electric controller 8. After receiving the PH value exceeding standard signal, the electric controller 8 starts the water pump between the PH value detection kettle 6 and the secondary electric flocculation tank 3 to pump the industrial wastewater into the secondary electric flocculation tank 3. When the PH value is lower than the preset standard value, a PH value reaching standard signal is sent to the electric controller 8. After receiving the PH value reaching standard signal, the electric controller 8 starts the water pump between the PH value detection kettle 5 and the PH value detection kettle 6 to pump the industrial wastewater into the clarification tank 7.

[0030] Flocculation treatment is to add polyaluminium chloride into industrial wastewater and stir it to aggregate the fine suspended particles and colloidal particles in the industrial wastewater into larger flocs.

[0031] A polyaluminium chloride water tank is arranged above the secondary electrocoagulation tank 3 , and the polyaluminium chloride water tank controls the polyaluminium chloride to flow into the industrial wastewater in the secondary electrocoagulation tank 3 through an electromagnetic valve.

Claims

1. A two-stage desulfurization wastewater clarification and concentration tank, comprising an electric controller (8), characterized in that: The invention comprises a desulfurization wastewater pool (1), wherein the desulfurization wastewater pool (1) is connected to a filter assembly (9), the filter assembly (9) is connected to a primary grit chamber (2), the primary grit chamber (2) is connected to a secondary electric flocculation chamber (3), the secondary electric flocculation chamber (3) is connected to a deflocculation reaction tower (4), the deflocculation reaction tower (4) is connected to a turbidity detection kettle (5), the turbidity detection kettle (5) is connected to a pH value detection kettle (6), the pH value detection kettle (6) is connected to a clarification water pool (7), the turbidity detection kettle (5) is also connected to the primary grit chamber (2), the pH value detection kettle (6) is also connected to the secondary electric flocculation chamber (3), and the connections between the components are completed through water supply pipes, each water supply pipe is provided with an electric control water pump, and the electric control water pump is uniformly controlled by an electric controller (8).

2. A two-stage desulfurization wastewater clarification and concentration tank according to claim 1, characterized in that: The desulfurization wastewater pool (1) is connected to the preceding industry. Industrial wastewater is stored in the desulfurization wastewater pool (1). The industrial wastewater is pumped out by an electric-controlled water pump and flows into the filter assembly (9).

3. A two-stage desulfurization wastewater clarification and concentration tank according to claim 2, characterized in that: The filter assembly is provided with a coarse screen and a fine screen. After the industrial wastewater flows into the filter assembly (9), it is pumped into the primary grit chamber (2) by an electric-controlled water pump. When the industrial wastewater is pumped, it first passes through the coarse screen to intercept large floating animals in the wastewater, and then passes through the fine screen to further remove particulate matter.

4. A two-stage desulfurization wastewater clarification and concentration tank according to claim 1, characterized in that: The primary grit chamber (2) performs primary sedimentation treatment on the industrial wastewater after it flows in, and after the treatment is completed, the wastewater is pumped into the secondary electric flocculation tank (3) through an electric-controlled water pump. An online mud level meter (11) is provided in the primary grit chamber (2). The online mud level meter (11) monitors the height of the sludge layer in real time to control the discharge and treatment of the sludge.

5. A two-stage desulfurization wastewater clarification and concentration tank according to claim 1, characterized in that: The secondary electric flocculation tank (3) performs flocculation treatment on the inflowing industrial wastewater. After the flocculation treatment, the industrial wastewater is pumped out through a water pump and flows into the deflocculation reaction tower (4).

6. A two-stage desulfurization wastewater clarification and concentration tank according to claim 1, characterized in that: The deflocculation reaction tower (4) is provided with multiple layers of ultrafiltration membranes, which utilize the screening effect of semi-permeable membranes to remove flocs generated by the industrial wastewater after the flocculation treatment. The industrial wastewater is pumped out by a water pump after the generated flocs are removed and flows into the turbidity detection kettle (5).

7. The two-stage desulfurization wastewater clarification and concentration tank according to claim 1, characterized in that: A turbidity detector is installed inside the turbidity detection kettle (5), and the turbidity detector is connected to the electric controller (8) by signal. The turbidity detector detects the turbidity of the industrial wastewater in the turbidity detection kettle (5). When the turbidity is higher than a preset value, a turbidity exceeding standard signal is sent to the electric controller (8). After receiving the turbidity exceeding standard signal, the electric controller (8) starts the water pump between the turbidity detection kettle (5) and the primary grit chamber (2) to pump the industrial wastewater into the primary grit chamber (2). When the turbidity is lower than the preset value, a turbidity reaching standard signal is sent to the electric controller (8). After receiving the turbidity reaching standard signal, the electric controller (8) starts the water pump between the turbidity detection kettle (5) and the pH value detection kettle (6) to pump the industrial wastewater into the primary pH value detection kettle (6).

8. The two-stage desulfurization wastewater clarification and concentration tank according to claim 1, characterized in that: A pH detector is installed inside the pH detection kettle (6), and the pH detector is connected to the electric controller (8) by signal. The pH detector detects the pH value of the industrial wastewater in the pH detection kettle (6). When the pH value is higher than a preset value, a pH value exceeding standard signal is sent to the electric controller (8). After receiving the pH value exceeding standard signal, the electric controller (8) starts the water pump between the pH detection kettle (6) and the secondary electric flocculation tank (3) to pump the industrial wastewater into the secondary electric flocculation tank (3). When the pH value is lower than the preset value, a pH value reaching standard signal is sent to the electric controller (8). After receiving the pH value reaching standard signal, the electric controller (8) starts the water pump between the pH detection kettle (5) and the pH detection kettle (6) to pump the industrial wastewater into the primary clarification tank (7).

9. A two-stage desulfurization wastewater clarification and concentration tank according to claim 6, characterized in that: The flocculation treatment is to add polyaluminium chloride into the industrial wastewater and stir it, so that the fine suspended particles and colloidal particles in the industrial wastewater are aggregated into flocs.

10. The two-stage desulfurization wastewater clarification and concentration tank according to claim 6, characterized in that: A polyaluminium chloride water tank is provided above the secondary electrocoagulation tank (3), and the polyaluminium chloride water tank controls the polyaluminium chloride to flow into the industrial wastewater in the secondary electrocoagulation tank (3) through an electromagnetic valve.

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