A wastewater integrated treatment system with high-efficiency flexible structure

Abstract

The utility model provides a kind of wastewater integrated treatment system with efficient flexible structure, comprising: triplex box, dosing mixing assembly, flocculation reactor, the triplex box is connected with desulfurization wastewater buffer tank drainage end by wastewater pipeline, branch collector and valve, the dosing mixing assembly is connected with desulfurization wastewater buffer tank drainage end by wastewater pipeline, branch collector and valve, compared with prior art, the utility model has the beneficial effects as follows: by installing efficient flocculant dosing, fast mixing integrated dosing mixing assembly beside existing triplex box, realize the direct dosing of composite powder efficient flocculant and the full and even mixing with desulfurization wastewater, meet the hydraulic condition of flocculation reaction of desulfurization wastewater and efficient flocculant, parallel operation with existing triplex box system and each other as standby, not only can improve wastewater treatment efficiency, also can ensure the stability of wastewater treatment operation.

Description

Technical Field

[0001] This utility model belongs to the field of power plant wastewater treatment technology, and specifically relates to an integrated wastewater treatment system with a highly efficient and flexible structure. Background Technology

[0002] After many power plants in China optimize their ultra-low emission standards, they discharge wet wastewater into the desulfurization system. This results in a large amount of fine particulate matter (mainly inert particles only a few micrometers in size) entering the desulfurization system. These inert particles are difficult to remove and continue to accumulate, leading to an increase in the viscosity of the absorber slurry. This causes a local increase in the slurry's supersaturation, reduces the mobility of ions in the slurry, and produces an inertization reaction. According to the classical crystal nucleation theory, the ion migration force in the slurry decreases, directly affecting gypsum crystallization and the normal growth of crystals. This leads to fouling of the filter cloth / plate, blockage of the filter cloth / plate pores, and difficulty in dewatering.

[0003] Coal-fired power plants commonly implement flue gas desulfurization, with limestone-gypsum wet desulfurization becoming the main process. The "three-compartment" process (also known as three-compartment, five-chemical) is widely used to treat desulfurization wastewater. However, the traditional "three-compartment" process has many problems:

[0004] 1. Adding acid or alkali causes severe corrosion and blockage of equipment and pipelines;

[0005] 2. The process is lengthy, requires significant equipment investment, incurs high operating costs, and involves heavy management and maintenance tasks;

[0006] 3. There are many types of drugs, large reserves, and certain safety hazards;

[0007] Therefore, we designed a novel integrated wastewater treatment system to solve this problem. Utility Model Content

[0008] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a wastewater integrated treatment system with a highly efficient and flexible structure, thereby solving the problems mentioned in the background technology.

[0009] This utility model is achieved through the following technical solution: a wastewater integrated treatment system with a highly efficient and flexible structure, comprising: a triple tank, a dosing and mixing component, and a flocculation reactor. The triple tank is connected to the drainage end of the desulfurization wastewater buffer tank through wastewater pipes, manifolds, and valves. The dosing and mixing component is connected to the drainage end of the desulfurization wastewater buffer tank through wastewater pipes, manifolds, and valves.

[0010] The discharge end of the dosing and mixing component is connected to the flocculation reactor via a wastewater pipe and a water pump. The flocculation reactor is connected to the clarification tank via a water pump and a wastewater pipe. The triplet is connected to the clarification tank via a water pump and a wastewater pipe.

[0011] In a preferred embodiment, the dosing and mixing assembly includes a tank, a stirrer, an inlet pipe, and a outlet pipe. The stirrer is fixed in the middle of the upper end of the tank. In actual use, the dosing and mixing assembly and the triplet are connected in parallel. Wastewater discharged from the desulfurization wastewater buffer tank can be separately transported to the dosing and mixing assembly or the triplet for dosing, or the wastewater can be simultaneously transported to the dosing and mixing assembly and the triplet, ensuring the operational stability of the wastewater treatment equipment.

[0012] In a preferred embodiment, a water inlet pipe is provided on the front side of the upper end of the tank, and the water inlet pipe is connected to the wastewater pipe connected to the desulfurization wastewater buffer tank.

[0013] In a preferred embodiment, a discharge pipe is provided on the side of the tank, and the discharge pipe is connected to the wastewater pipe of the flocculation reactor inlet.

[0014] In a preferred embodiment, a feed inlet 1 is provided on the left side of the upper end of the tank, and a feed inlet 2 is provided on the right side of the upper end of the tank.

[0015] In a preferred embodiment, the clarification tank is connected to the product water tank via a conveying pipe. A set of micro-nano cavitation generators is installed on each side of the product water tank. A set of pipe networks for uniformly conveying cavitation bubbles to the product water tank is installed on the left and right sides of the bottom of the product water tank. The two sets of pipe networks are fixedly connected to the two sets of micro-nano cavitation generators. Utilizing the unique characteristics of micro-nano cavitation bubbles, such as large specific surface area, slow rising speed, self-pressurization dissolution, extremely high oxygen solubility, generation of a large number of free radicals, and strong oxidation ability, the dissolved oxygen content in the wastewater is greatly increased by aerating the product water with micro-nano cavitation bubbles. The aeration oxidizes the reducing substances in the desulfurization wastewater, which helps to remove dissolved volatiles from the desulfurization wastewater.

[0016] After adopting the above technical solution, the beneficial effects of this utility model are as follows: by adding a high-efficiency flocculant addition and rapid mixing integrated dosing and mixing component next to the existing triplet, the direct addition of composite powder high-efficiency flocculant and its thorough and uniform mixing with desulfurization wastewater can be achieved, satisfying the hydraulic conditions for the flocculation reaction between desulfurization wastewater and high-efficiency flocculant. It can operate in parallel with the existing triplet system as a backup for each other, which can not only improve the wastewater treatment efficiency, but also ensure the stability of wastewater treatment operation. Whether the triplet or the dosing and mixing component fails, the entire system can continue to treat wastewater.

[0017] The dosing and mixing components integrate the collection of wet desulfurization and desulfurization wastewater, and directly add a composite powder high-efficiency flocculant in a dry manner, replacing the cumbersome dosing process. The flocculation reactor can effectively remove suspended solids, fluorides, sulfides, and heavy metal ions from the wastewater, reduce chemical oxygen demand and ammonia nitrogen, and effectively adjust the pH value. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of an integrated wastewater treatment system with a highly efficient and flexible structure according to the present invention.

[0020] Figure 2 This is a schematic diagram of the flocculation reactor of an integrated wastewater treatment system with a highly efficient and flexible structure according to this utility model.

[0021] Figure 3 This is a schematic diagram of the dosing and mixing component of a wastewater integrated treatment system with a highly efficient and flexible structure according to this utility model.

[0022] Figure 4 This is a schematic diagram of the internal structure of the dosing and mixing component of a wastewater integrated treatment system with a highly efficient and flexible structure according to this utility model.

[0023] Figure 5 This is a schematic diagram of the wastewater treatment process of an integrated wastewater treatment system with a highly efficient and flexible structure according to the present invention.

[0024] In the picture, 100 is a triple container;

[0025] 200 - Dosing and mixing component, 210 - Tank body, 220 - Inlet 1, 230 - Mixing component, 240 - Inlet 2, 250 - Water inlet pipe, 260 - Discharge pipe;

[0026] 300-Flocculation Reactor. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figures 1 to 5This utility model provides a technical solution: a wastewater integrated treatment system with a highly efficient and flexible structure, including: a triple tank 100, a dosing and mixing component 200, and a flocculation reactor 300. The triple tank 100 is connected to the drain end of the desulfurization wastewater buffer tank through wastewater pipes, manifolds, and valves. The dosing and mixing component 200 is connected to the drain end of the desulfurization wastewater buffer tank through wastewater pipes, manifolds, and valves.

[0029] The discharge end of the dosing and mixing component 200 is connected to the flocculation reactor 300 via a wastewater pipe and a water pump. The flocculation reactor 300 is connected to the clarification tank via a water pump and a wastewater pipe. The triple box 100 is connected to the clarification tank via a water pump and a wastewater pipe.

[0030] The dosing mixing assembly 200 includes a tank 210, an agitator 230, an inlet pipe 250, and a outlet pipe 260. The agitator 230 is fixed in the middle of the upper end of the tank 210. In actual use, the dosing mixing assembly 200 and the triplet 100 are connected in parallel. The wastewater discharged from the desulfurization wastewater buffer tank can be separately transported to the dosing mixing assembly 200 or the triplet 100 for dosing, or the wastewater can be simultaneously transported to the dosing mixing assembly 200 and the triplet 100, ensuring the operational stability of the wastewater treatment equipment.

[0031] As the first embodiment of this utility model, by adding a high-efficiency flocculant dosing and rapid mixing integrated dosing and mixing component 200 next to the existing triplet 100, the direct dosing of composite powder high-efficiency flocculant and its thorough and uniform mixing with desulfurization wastewater are achieved. This satisfies the hydraulic conditions for the flocculation reaction between the desulfurization wastewater and the high-efficiency flocculant. Operating in parallel with the existing triplet 100 system as a backup, this not only improves wastewater treatment efficiency but also ensures the stability of wastewater treatment operation. Whether the triplet 100 or the dosing and mixing component 200 fails, the entire system can continue to operate normally. Wastewater treatment continues, and the original effluent tank of the desulfurization system is reused as a wastewater production tank. Two sets of micro-nano bubble generators and corresponding pipe networks are added to the left and right sides of the production tank. Utilizing the unique characteristics of micro-nano bubbles, such as large specific surface area, slow rising speed, self-pressurization and dissolution, extremely high oxygen solubility, and the generation of a large number of free radicals and strong oxidation capacity, the dissolved oxygen content in the wastewater is greatly increased by aerating the micro-nano bubble production water. This aeration oxidizes the reducing substances in the desulfurization wastewater and removes dissolved volatiles (existing market products can be used for the micro-nano bubble generators).

[0032] Please see Figures 1 to 4 A water inlet pipe 250 is provided on the front side of the upper end of the tank body 210, and the water inlet pipe 250 is connected to the wastewater pipe connected to the desulfurization wastewater buffer tank.

[0033] A discharge pipe 260 is provided on the side of the tank 210, and the discharge pipe 260 is connected to the wastewater pipe of the flocculation reactor 300.

[0034] A feed inlet 220 is provided on the left side of the upper end of the tank body 210, and a feed inlet 240 is provided on the right side of the upper end of the tank body 210.

[0035] The clarification tank is connected to the product water tank via a delivery pipe. A set of micro-nano cavitation generators is installed on each side of the product water tank. A set of pipe networks for uniformly delivering cavitation bubbles to the product water tank is installed on the left and right sides of the bottom of the product water tank. The two sets of pipe networks are fixedly connected to the two sets of micro-nano cavitation generators. Utilizing the unique characteristics of micro-nano cavitation bubbles, such as large specific surface area, slow rising speed, self-pressurization and dissolution, extremely high oxygen solubility, and the generation of a large number of free radicals and strong oxidation capacity, the dissolved oxygen content in the wastewater is greatly increased by aerating the product water of the desulfurization wastewater with micro-nano cavitation bubbles. The aeration oxidizes the reducing substances in the desulfurization wastewater, which helps to remove dissolved volatiles in the desulfurization wastewater.

[0036] As a second embodiment of this utility model, based on the first embodiment above, the dosing and mixing component 200 integrates the collection of wet desulfurization and desulfurization wastewater, and directly adds a composite powder high-efficiency flocculant in a dry manner, replacing the cumbersome dosing process. The flocculation reactor 300 can effectively remove suspended solids, fluorides, sulfides, and heavy metal ions from the wastewater, reduce chemical oxygen demand and ammonia nitrogen, and effectively adjust the pH value (the flocculation reactor 300, desulfurization wastewater buffer tank, product water tank, and clarification tank mentioned above all adopt the original desulfurization wastewater treatment system equipment).

[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A wastewater integrated treatment system with a highly efficient and flexible structure, comprising: The three-unit tank (100), the dosing and mixing component (200), and the flocculation reactor (300) are characterized in that the three-unit tank (100) is connected to the drain end of the desulfurization wastewater buffer tank through wastewater pipes, manifolds and valves, and the dosing and mixing component (200) is connected to the drain end of the desulfurization wastewater buffer tank through wastewater pipes, manifolds and valves. The discharge end of the dosing and mixing component (200) is connected to the flocculation reactor (300) via a wastewater pipe and a water pump. The flocculation reactor (300) is connected to the clarification tank via a water pump and a wastewater pipe. The triplet (100) is connected to the clarification tank via a water pump and a wastewater pipe.

2. The wastewater integrated treatment system with a highly efficient and flexible structure as described in claim 1, characterized in that: The dosing and mixing assembly (200) includes a tank (210), a stirring element (230), a water inlet pipe (250), and a discharge pipe (260). The stirring element (230) is fixed in the middle of the upper end of the tank (210).

3. The wastewater integrated treatment system with a highly efficient and flexible structure as described in claim 2, characterized in that: The tank (210) is provided with a water inlet pipe (250) on the front side of the upper end, and the water inlet pipe (250) is connected to the wastewater pipe connected to the desulfurization wastewater buffer tank.

4. The wastewater integrated treatment system with a highly efficient and flexible structure as described in claim 2, characterized in that: The tank (210) is provided with a discharge pipe (260) on its side, and the discharge pipe (260) is connected to the wastewater pipe of the flocculation reactor (300).

5. The wastewater integrated treatment system with a highly efficient and flexible structure as described in claim 2, characterized in that: A feed inlet 1 (220) is provided on the left side of the upper end of the tank body (210), and a feed inlet 2 (240) is provided on the right side of the upper end of the tank body (210).

6. The wastewater integrated treatment system with a highly efficient and flexible structure as described in claim 1, characterized in that: The clarification tank is connected to the product water tank via a delivery pipe, and a set of micro-nano cavitation generators is installed on each side of the product water tank. The bottom left and right sides of the water production tank are each equipped with a set of pipe networks for uniformly conveying cavitation bubbles into the water production tank, and the two sets of pipe networks are respectively fixedly connected to two sets of micro-nano cavitation bubble generators.

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