Desulfurization wastewater settling tank

Abstract

The utility model provides a desulfurization wastewater settling tank, which belongs to the technical field of desulfurization wastewater treatment and comprises two settling tank bodies in a gypsum room, a first pipeline and a second pipeline are arranged on the settling tank bodies, an aeration component is arranged in each settling tank body, and a first connecting pipe and a second connecting pipe are arranged between the two settling tank bodies. The first connecting pipe is connected with a clear liquid temporary storage tank through a first guide pipe, and the second connecting pipe is connected with a desulfurization circulating pool through a second guide pipe. The upper layer liquid containing few particles is sent to the downstream clear liquid tank for reuse, the lower layer liquid containing many particles is sent to the desulfurization circulating pool again after timing aeration, the situation that many solid particles exist in waste water and are rejected by a sewage treatment plant is avoided, workers do not need to clean precipitated gypsum particles, and time and labor are saved.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of desulfurization wastewater treatment, in particular to a desulfurization wastewater sedimentation box. Background Art

[0002] Desulfurization wastewater refers to the wastewater generated during the flue gas desulfurization process in thermal power plants, steel mills, refineries and other enterprises. When these enterprises use sulfur-containing fuels such as coal and oil for production, they will produce a large amount of sulfur dioxide (SO2), which is one of the main causes of air pollution and acid rain. In order to reduce sulfur dioxide emissions, wet desulfurization and other processes are used to desulfurize the flue gas.

[0003] At present, the desulfurization wastewater generated by these enterprises is discharged to the sewage treatment plant after simple sedimentation. However, sometimes the desulfurization wastewater contains a lot of solid particles and is rejected by the sewage treatment plant. This is mainly because in the desulfurization wastewater treatment, the desulfurization wastewater must be introduced into the gypsum room. The function of the gypsum room is mainly to dehydrate the gypsum slurry generated during the desulfurization process. However, the precipitated gypsum needs to be cleaned manually, and the process consumes a lot of manpower and time. Utility Model Content

[0004] The technical solution of the present invention addresses the technical problem that the existing technical solutions are too single, and provides a solution that is significantly different from the existing technology. Specifically, the present invention mainly provides a desulfurization wastewater sedimentation box to solve the technical problem raised in the above background technology that in the current desulfurization wastewater treatment, a large amount of gypsum particles will be precipitated in the gypsum room, resulting in an increase in the solid particles contained in the desulfurization wastewater, which does not meet the acceptance standards of the sewage treatment plant.

[0005] The technical solution adopted by the utility model to solve the above technical problems is:

[0006] A desulfurization wastewater sedimentation tank comprises two sedimentation tanks in a gypsum room, wherein a first pipeline and a second pipeline are provided on the sedimentation tanks, an aeration assembly is provided in each of the sedimentation tanks, and a first connecting pipe located at a higher position and a second connecting pipe located at a lower position are provided between the two sedimentation tanks, a first guide pipe is provided on the first connecting pipe, a clear liquid temporary storage tank is provided at the lower end of the first guide pipe, a second guide pipe is provided on the second connecting pipe, and a desulfurization circulation pool is provided at the lower end of the second guide pipe.

[0007] Furthermore, glass flakes are provided on the inner wall of each sedimentation box, and an anti-corrosion paint coating is provided on the outer wall of the sedimentation box.

[0008] Furthermore, each of the aeration components includes two parallel delivery pipes, and a plurality of aeration pipes are connected between the two delivery pipes via pipe fittings, and the aeration pipes are mounted on the bottom of the corresponding sedimentation box by snap fasteners.

[0009] Furthermore, the first pipeline includes a vacuum belt conveyor, and the output end of the vacuum belt conveyor is provided with a first directional pipe, and the first directional pipe is provided with two first branch pipes, and the two first branch pipes are respectively connected to corresponding sedimentation boxes.

[0010] Furthermore, the second pipeline includes an aeration fan, and the output end of the aeration fan is provided with a second directional pipe, and the second directional pipe is provided with two second branch pipes, and the two second branch pipes are respectively connected to the corresponding delivery pipes.

[0011] Furthermore, the clear liquid temporary storage box is connected to the original filtrate tank via a pipeline, the original filtrate tank pipeline is connected to the clear liquid storage box, and a water pump is provided between the clear liquid storage box and the original filtrate tank.

[0012] Furthermore, valves are provided at both ends of the first branch pipe, the second branch pipe, the first connecting pipe and the second connecting pipe.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] The utility model realizes the addition of a desulfurization wastewater sedimentation box in the existing gypsum room by arranging the first connecting pipe, the second connecting pipe, the first guide pipe, the second guide pipe, the first pipeline, the valve and the pump body, so as to carry out sedimentation and stratification treatment on the desulfurization wastewater, so that the liquid containing less particulate matter in the upper layer is sent to the downstream clear liquid tank for reuse, and the liquid containing more particulate matter in the lower layer is re-sent into the desulfurization circulation pool after regular aeration, so as to avoid the situation where there are too many solid particles in the wastewater and it is rejected by the sewage treatment plant. In addition, the mutual cooperation between the second directional pipe, the second branch pipe, the aeration fan, the conveying pipe and the aeration pipe can agitate the gypsum particles settled at the bottom of the sedimentation box, so that it is convenient to discharge it later, and there is no need for staff to clean the settled gypsum particles, which saves time and effort, is very convenient and has certain practical value.

[0015] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall connection plane of the utility model;

[0017] Figure 2 This is a schematic diagram of the specific connection of the pipeline of the utility model;

[0018] Figure 3 This is a schematic diagram of the sedimentation box structure of the present utility model.

[0019] In the figure: 1. Sedimentation box; 11. First connecting pipe; 12. Second connecting pipe; 13. First guide pipe; 14. Second guide pipe; 15. Aeration assembly; 151. Delivery pipe; 152. Aeration pipe; 16. Glass flakes; 17. Anti-corrosion paint coating; 2. First pipeline; 21. First directional pipe; 22. First branch pipe; 23. Vacuum belt conveyor; 3. Second pipeline; 31. Second directional pipe; 32. Second branch pipe; 33. Aeration fan; 4. Desulfurization circulation pool; 5. Clear liquid temporary storage box; 6. Original filtrate tank; 7. Clear liquid storage box; 8. Valve; 9. Water pump. DETAILED DESCRIPTION

[0020] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings, but the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0021] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly used by technicians in the technical field of the present invention. The terminology used in the specification of the present invention is for the purpose of describing specific embodiments and is not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0023] Please refer to the attached Figure 1-3 A desulfurization wastewater sedimentation tank comprises two sedimentation tanks 1 in a gypsum room, wherein a first pipeline 2 and a second pipeline 3 are provided on the sedimentation tanks 1, an aeration assembly 15 is provided in each sedimentation tank 1, and a first connecting pipe 11 located at a high position and a second connecting pipe 12 located at a low position are provided between the two sedimentation tanks 1, a first guide pipe 13 is provided on the first connecting pipe 11, a clear liquid temporary storage tank 5 is provided at the lower end of the first guide pipe 13, a second guide pipe 14 is provided on the second connecting pipe 12, and a desulfurization circulation pool 4 is provided at the lower end of the second guide pipe 14.

[0024] Through the above structure, it is possible to add a desulfurization wastewater sedimentation tank in the existing gypsum room, and perform sedimentation and stratification treatment on the desulfurization wastewater, so that the upper layer of liquid containing less particulate matter is sent to the downstream clear liquid tank for reuse, and the lower layer of liquid containing more particulate matter is sent back to the desulfurization circulation pool 4 after regular aeration, thereby avoiding the situation where the wastewater contains too many solid particles and is rejected by the sewage treatment plant, and there is no need for staff to clean up the precipitated gypsum particles, which saves time and effort, is very convenient, and has certain practical value.

[0025] The specific operation is as follows: first, the desulfurization wastewater filtered out by the vacuum belt conveyor 23 is directly sent to the sedimentation box 1. If the desulfurization wastewater in the sedimentation box 1 contains a large number of solid particles, the wastewater is subjected to sedimentation and stratification treatment, and then the valve 8 on the first connecting pipe 11 is opened, and then the upper layer of liquid containing less particulate matter is sent to the downstream clear liquid temporary storage box 5 through the first guide pipe 13, and then sent to the original filtrate tank 6 and the clear liquid storage tank 7 in sequence through the pipeline, and then the valve 8 on the first connecting pipe 11 is closed, the aeration fan 33 is turned on, and the bottom of the sedimentation box 1 is aerated through the aeration pipe 152, so that the gypsum particles at the bottom of the sedimentation box 1 are lifted up, and then the lower layer of liquid containing more particulate matter is introduced into the desulfurization circulation pool 4 through the second connecting pipe 12 and the second guide pipe 14.

[0026] Please refer to the attached Figure 1 and attached Figure 2 The first pipeline 2 includes a vacuum belt conveyor 23, and the output end of the vacuum belt conveyor 23 is provided with a first directional pipe 21. The first directional pipe 21 is provided with two first branches 22, and the two first branches 22 are respectively connected to the corresponding sedimentation box 1. Through the first pipeline 2, the desulfurization wastewater is sent into the sedimentation box 1. The second pipeline 3 includes an aeration fan 33, and the output end of the aeration fan 33 is provided with a second directional pipe 31. The second directional pipe 31 is provided with two second branches 32, and the two second branches 32 are respectively connected to the corresponding The corresponding delivery pipe 151 is connected, and the air source is provided to the aeration pipe 152 through the second pipeline 3. The clear liquid temporary storage box 5 is connected to the original filtrate tank 6 through a pipeline, and the original filtrate tank 6 is connected to the clear liquid storage tank 7 through a pipeline. A water pump 9 is provided between the clear liquid storage tank 7 and the original filtrate tank 6. The water pump 9 is used to control the flow rate of the liquid in the pipeline. The first branch pipe 22, the second branch pipe 32, both ends of the first connecting pipe 11 and both ends of the second connecting pipe 12 are provided with valves 8. The valves 8 are used to control the on-off of the pipeline.

[0027] Please refer to the attached Figure 1 and attached Figure 3, each of the sedimentation box 1 is provided with glass flakes 16 on the inner wall. The glass flakes 16 are a material with excellent corrosion resistance and can resist the erosion of acidic substances (such as sulfuric acid, hydrochloric acid, etc.) contained in the desulfurization wastewater, protecting the box from corrosion. It has a certain hardness and wear resistance, which can reduce the wear of the solid particles in the wastewater on the inner wall of the sedimentation box 1, and the outer wall of the sedimentation box 1 is provided with an anti-corrosion paint coating 17. The anti-corrosion paint coating 17 realizes the protection of the outer wall of the sedimentation box 1. Each of the aeration components 15 includes two parallel distributed conveying pipes 151, and a plurality of aeration pipes 152 are connected between the two conveying pipes 151 through pipe fittings. The aeration pipe 152 is installed at the bottom of the corresponding sedimentation box 1 by a snap. Through the aeration component 15, the gypsum particles at the bottom of the sedimentation box 1 are lifted up to avoid precipitation and facilitate discharge.

[0028] The above description of the present invention is illustrative in combination with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as such non-substantial improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A desulfurization wastewater sedimentation tank, comprising two sedimentation tanks (1) in a gypsum room, characterized in that: The sedimentation box (1) is provided with a first pipeline (2) and a second pipeline (3), each of the sedimentation boxes (1) is provided with an aeration assembly (15), and a first connecting pipe (11) located at a higher position and a second connecting pipe (12) located at a lower position are provided between the two sedimentation boxes (1), a first guide pipe (13) is provided on the first connecting pipe (11), a clear liquid temporary storage tank (5) is provided at the lower end of the first guide pipe (13), a second guide pipe (14) is provided on the second connecting pipe (12), and a desulfurization circulation pool (4) is provided at the lower end of the second guide pipe (14).

2. A desulfurization wastewater sedimentation tank according to claim 1, characterized in that: Glass flakes (16) are provided on the inner wall of each sedimentation box (1), and an anti-corrosion paint coating (17) is provided on the outer wall of the sedimentation box (1).

3. A desulfurization wastewater sedimentation tank according to claim 1, characterized in that: Each of the aeration components (15) comprises two parallel delivery pipes (151), and a plurality of aeration pipes (152) are connected between the two delivery pipes (151) via pipe fittings. The aeration pipes (152) are mounted on the bottom of the corresponding sedimentation box (1) via buckles.

4. A desulfurization wastewater sedimentation tank according to claim 1, characterized in that: The first pipeline (2) includes a vacuum belt conveyor (23), and the output end of the vacuum belt conveyor (23) is provided with a first directional pipe (21). The first directional pipe (21) is provided with two first branch pipes (22), and the two first branch pipes (22) are respectively connected to corresponding sedimentation boxes (1).

5. A desulfurization wastewater sedimentation tank according to claim 1, characterized in that: The second pipeline (3) includes an aeration fan (33), and the output end of the aeration fan (33) is provided with a second directional pipe (31). The second directional pipe (31) is provided with two second branch pipes (32), and the two second branch pipes (32) are respectively connected to corresponding delivery pipes (151).

6. A desulfurization wastewater sedimentation tank according to claim 1, characterized in that: The clear liquid temporary storage box (5) is connected to the original filtrate tank (6) via a pipeline, the original filtrate tank (6) is connected to the clear liquid storage box (7) via a pipeline, and a water pump (9) is provided between the clear liquid storage box (7) and the original filtrate tank (6).

7. A desulfurization wastewater sedimentation tank according to claim 4, characterized in that: Valves (8) are provided at both ends of the first branch pipe (22), the second branch pipe (32), the first connecting pipe (11), and the second connecting pipe (12).

Images