A wastewater treatment system for a desulfurization device in a thermal power plant

Abstract

The utility model relates to a wastewater treatment system for a desulfurization device in a thermal power plant, comprising a reaction box, a clarification box is arranged on one side of the reaction box, a partition plate is arranged in the middle of the clarification box, the partition plate divides the interior of the clarification box into a neutralization reaction zone and a flocculation zone, a support plate is fixed on the top of the neutralization reaction zone, a dosing hopper for dosing lime milk is fixed on the support plate, an umbrella-shaped top plate and a distribution plate are fixed on the bottom of the dosing hopper, and the top plate and the distribution plate are fixedly connected by a plurality of connecting rods arranged in a ring array. When dosing lime milk, a certain amount of lime milk is added into the dosing hopper, and a rotating shaft is rotated to rotate a paddle plate, so that the lime milk flowing down the dosing hopper can be driven by the paddle plate, so that part of it flows out through the bottom of the distribution plate, and part of it flows out through a plurality of dosing channels between the top plate and the distribution plate, so as to facilitate the lime milk to be relatively evenly distributed when dosing, and the rotation of the paddle plate plays a role in preventing the bottom of the dosing hopper from being blocked.

Description

Technical Field

[0001] The utility model relates to a desulfurization device technology for a thermal power plant, in particular to a wastewater treatment system for a desulfurization device for a thermal power plant. Background Art

[0002] Desulfurization wastewater is industrial wastewater generated by power plants using wet limestone and gypsum for desulfurization process. Compared with other types of wastewater from power plants, desulfurization wastewater has a higher content of pollutants, including various inorganic salts and heavy metals, which cause greater damage to the environment. Due to its serious pollution characteristics, desulfurization wastewater is generally treated comprehensively using a variety of wastewater treatment processes, such as a combination of coagulation clarification process and acid-base neutralization process.

[0003] At present, in the acid-base neutralization process of desulfurization wastewater treatment, lime milk is required to be added, which easily leads to blockage of the dosing pipeline during the dosing process, and it is not convenient to distribute the lime milk relatively evenly during the dosing, thereby accelerating the mixing efficiency. Utility Model Content

[0004] The utility model aims to provide a wastewater treatment system for a desulfurization device in a thermal power plant, which is used to solve the problem that in the acid-base neutralization process of the existing desulfurization wastewater treatment, lime milk needs to be added, which easily leads to blockage of the dosing pipeline during the dosing process and is not convenient for relatively uniform distribution of the lime milk during the dosing process.

[0005] In order to solve the above problems, the utility model provides a wastewater treatment system for a desulfurization device in a thermal power plant, comprising a reaction box, a clarification box is provided on one side of the reaction box, two partition plates are provided in the middle of the clarification box, the partition plates divide the interior of the clarification box into a neutralization reaction zone and a flocculation zone, a support plate is fixed on the top of the neutralization reaction zone, a dosing hopper for dosing lime milk is fixed on the support plate, an umbrella-shaped top plate and a distribution plate are fixed at the bottom of the dosing hopper, the top plate and the distribution plate are fixedly connected by a plurality of connecting rods arranged in a ring array, the connecting rods divide the top plate and the distribution plate into a plurality of dosing channels, a rotatable rotating shaft is provided in the dosing hopper, a plurality of dial plates are fixed on the rotating shaft, and the plurality of dial plates are located between the top plate and the distribution plate.

[0006] The wastewater treatment system of the desulfurization device of a thermal power plant provided by the utility model also has the following technical features:

[0007] Furthermore, a connecting plate is fixed on the top of the dosing hopper, a first motor is fixedly mounted on the connecting plate, and an output end of the first motor is fixedly connected to the top of the rotating shaft.

[0008] Furthermore, a first stirring frame is fixed to one end of the rotating shaft extending into the neutralization reaction zone.

[0009] Furthermore, a rotating frame is fixed on the rotating shaft, and the rotating frame is located at the bottom of the medicine adding hopper.

[0010] Furthermore, a top plate is fixedly connected to the top of the flocculation zone, a second motor is fixedly mounted on the top plate, and a second stirring frame is fixedly mounted on the output end of the second motor.

[0011] Furthermore, an arc-shaped convex ridge is integrally formed in the medicine adding hopper, a spring sheet is fixedly connected to the rotating shaft, a shifting post is fixed at one end of the spring sheet, and the shifting post can abut against the corresponding arc-shaped convex ridge.

[0012] The utility model has the following beneficial effects: when adding lime milk, a certain amount of lime milk is added into the dosing hopper, and the rotating shaft is rotated to rotate the paddle plate, so that the lime milk flowing through the dosing hopper can be driven by the paddle plate to partially flow out through the bottom of the distribution plate and partially flow out through multiple dosing channels between the top plate and the distribution plate, so that the lime milk is relatively evenly distributed during dosing, thereby accelerating the mixing efficiency, and the rotation of the paddle plate prevents the bottom of the dosing hopper from being blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is an axonometric diagram of an embodiment of the utility model;

[0014] Figure 2 A cross-sectional view of an embodiment of the utility model;

[0015] Figure 3 It is a structural diagram of the medicine adding hopper in the embodiment of the utility model. DETAILED DESCRIPTION

[0016] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0017] like Figures 1 to 3In the embodiment of the wastewater treatment system of the desulfurization device of a thermal power plant of the utility model shown in the figure, the wastewater treatment system of the desulfurization device of the thermal power plant comprises a reaction box 1, a clarification box 2 is arranged on one side of the reaction box 1, two partition plates 3 are arranged in the middle of the clarification box 2, the partition plate 3 divides the interior of the clarification box 2 into a neutralization reaction zone 4 and a flocculation zone 5, a support plate 6 is fixed on the top of the neutralization reaction zone 4, a dosing hopper 7 for dosing lime milk is fixed on the support plate 6, an umbrella-shaped top plate 8 and a distribution plate 9 are fixed on the bottom of the dosing hopper 7, the top plate 8 and the distribution plate 9 are fixedly connected by a plurality of connecting rods 10 arranged in a ring array, the connecting rod 10 divides the top plate 8 and the distribution plate 9 into a plurality of dosing channels, a rotatable rotating shaft 11 is arranged in the dosing hopper 7, a plurality of dial plates 12 are fixed on the rotating shaft 11, and the plurality of dial plates 12 are located between the top plate 8 and the distribution plate 9, and the desulfurized wastewater enters the neutralization reaction zone 4 in the reaction box 1 after passing through the pre-sedimentation tank and the aeration tank. In the reaction zone 4, lime milk is added to the desulfurized wastewater in the neutralization reaction zone 4 for neutralization, and then a suitable concentration of sulfide is added to further precipitate the metal ions. Then, the desulfurized wastewater in the neutralization reaction zone 4 is pumped into the flocculation zone 5 for flocculation process treatment. By adding flocculants and coagulants in the flocculation zone 5, the treated desulfurized wastewater is injected into the clarification tank 2 for clarification and precipitation. When adding lime milk, a certain amount of lime milk is added to the dosing hopper 7. By rotating the rotating shaft 11, the paddle 12 can be rotated, so that the lime milk flowing through the dosing hopper 7 can be driven by the paddle 12, so that part of it flows out through the bottom of the distribution plate 9, and part of it flows out through the multiple dosing channels between the top plate 8 and the distribution plate 9, so as to facilitate the relatively uniform distribution of the lime milk during dosing, thereby accelerating the mixing efficiency, and the rotation of the paddle 12 plays a role in preventing the bottom of the dosing hopper 7 from being blocked.

[0018] In one embodiment of the present application, preferably, a connecting plate 13 is fixed to the top of the dosing hopper 7, and a first motor 14 is fixedly mounted on the connecting plate 13. The output end of the first motor 14 is fixedly connected to the top of the rotating shaft 11. By starting the first motor 14, the rotating shaft 11 can be driven to rotate, thereby driving the dial plate 12 to rotate.

[0019] In one embodiment of the present application, preferably, a first stirring frame 12 is fixed to one end of the rotating shaft 11 extending into the neutralization reaction zone 4, and the rotation of the rotating shaft 11 drives the first stirring frame 12 to rotate, thereby accelerating the mixing reaction.

[0020] In one embodiment of the present application, preferably, a rotating frame 22 is fixed on the rotating shaft 11, and the rotating frame 22 is located at the bottom of the dosing hopper 7. The rotation of the rotating shaft 11 can drive the rotating frame 22 to rotate, thereby further avoiding the problem of clogging at the bottom of the dosing hopper 7.

[0021] In one embodiment of the present application, preferably, a top plate 15 is fixedly connected to the top of the flocculation zone 5, a second motor 16 is fixedly mounted on the top plate 15, a second stirring frame 17 is fixedly mounted on the output end of the second motor 16, and the second stirring frame 17 can be driven to rotate by starting the second motor 16, thereby accelerating the reaction.

[0022] In one embodiment of the present application, preferably, an arc-shaped ridge 18 is integrally formed in the dosing hopper 7, a spring sheet 19 is fixedly connected to the rotating shaft 11, a lever 20 is fixed to one end of the spring sheet 19, and the lever 20 can contact with the corresponding arc-shaped ridge 18. The rotating shaft 11 can drive the spring sheet 19 and the lever 20 to rotate, and the lever 20 contacts and collides with the arc-shaped ridge 18 in the dosing hopper 7, thereby playing a role of vibration, which can facilitate the dosing of lime milk.

[0023] The treated water after treatment in the clarification box 2 is discharged from the wastewater room to the desulfurization wastewater pool through the clean water pump, and then the ash sprinkling pump regularly discharges the wastewater in the wastewater pool to the power plant ash yard, and a new water outlet pipe is installed on the ash sprinkling pump outlet pipe to lead it to the coal yard and the truck unloading shed.

[0024] When the utility model is in use, the desulfurized wastewater enters the neutralization reaction zone 4 in the reaction box 1 after passing through the external pre-sedimentation tank and the aeration tank, and is neutralized by adding lime milk to the desulfurized wastewater in the neutralization reaction zone 4, and then adding sulfide of appropriate concentration to further precipitate the metal ions, and then the desulfurized wastewater in the neutralization reaction zone 4 is pumped into the flocculation zone 5 through the external structure water pump for flocculation process treatment, and the treated desulfurized wastewater is injected into the clarification box 2 through the external structure water pump for clarification and precipitation, and when the lime milk is added, a certain amount of lime milk is added to the dosing hopper 7, and the first motor 14 is started to drive the rotating shaft 11 rotates, the rotating shaft 11 rotates, which can make the paddle 12 rotate, so that the lime milk flowing down through the dosing hopper 7 can be driven by the paddle 12, so that part of it flows out through the bottom of the distribution plate 9, and part of it flows out through multiple dosing channels between the top plate 8 and the distribution plate 9, so as to facilitate the relatively uniform distribution of the lime milk during dosing, thereby accelerating the mixing efficiency, and the rotation of the paddle 12 prevents the bottom of the dosing hopper 7 from being blocked, the rotation of the rotating shaft 11 can drive the rotating frame 22 to rotate, the rotating shaft 11 can drive the spring sheet 19 and the paddle 20 to rotate, the paddle 20 contacts and collides with the arc-shaped convex ridge 18 in the dosing hopper 7, thereby playing a role of vibration, which can facilitate the dosing of lime milk.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A wastewater treatment system for a desulfurization device in a thermal power plant, comprising a reaction box (1), characterized in that: A clarification box (2) is provided on one side of the reaction box (1), a partition plate (3) is provided in the middle of the clarification box (2), the partition plate (3) divides the interior of the clarification box (2) into a neutralization reaction zone (4) and a flocculation zone (5), a support plate (6) is fixed on the top of the neutralization reaction zone (4), a dosing hopper (7) for dosing lime milk is fixed on the support plate (6), an umbrella-shaped top plate (8) and a distribution plate (9) are fixed on the bottom of the dosing hopper (7), the top plate (8) and the distribution plate (9) are fixedly connected by a plurality of connecting rods (10) arranged in a ring array, the connecting rods (10) divide the top plate (8) and the distribution plate (9) into a plurality of dosing channels, a rotatable shaft (11) is provided in the dosing hopper (7), a plurality of dial plates (12) are fixed on the shaft (11), and the plurality of dial plates (12) are located between the top plate (8) and the distribution plate (9).

2. The wastewater treatment system for a desulfurization device in a thermal power plant according to claim 1, characterized in that: A connecting plate (13) is fixed to the top of the dosing hopper (7), a first motor (14) is fixedly mounted on the connecting plate (13), and an output end of the first motor (14) is fixedly connected to the top of the rotating shaft (11).

3. The wastewater treatment system for a desulfurization device in a thermal power plant according to claim 2, characterized in that: A first stirring frame (21) is fixed to one end of the rotating shaft (11) extending into the neutralization reaction zone (4).

4. The wastewater treatment system for a desulfurization device in a thermal power plant according to claim 1, characterized in that: A rotating frame (22) is fixed on the rotating shaft (11), and the rotating frame (22) is located at the bottom of the medicine adding hopper (7).

5. The wastewater treatment system for a desulfurization device in a thermal power plant according to claim 1, characterized in that: A top plate (15) is fixedly connected to the top of the flocculation zone (5), a second motor (16) is fixedly mounted on the top plate (15), and a second stirring frame (17) is fixedly mounted on the output end of the second motor (16).

6. The wastewater treatment system for a desulfurization device in a thermal power plant according to claim 1, characterized in that: The dosing hopper (7) is integrally formed with an arc-shaped ridge (18), a spring sheet (19) is fixedly connected to the rotating shaft (11), a shifting post (20) is fixed to one end of the spring sheet (19), and the shifting post (20) can abut against the corresponding arc-shaped ridge (18).

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