Desulfurization wastewater concentration and evaporation device

Abstract

The utility model discloses a desulfurization waste water concentration evaporation device, which comprises a concentration tower, a waste water modulation box and a waste water drying tower, the bottom of the concentration tower is in an inverted cone shape to form a salt discharge structure, the bottom of the salt discharge structure is connected with a salt discharge pump, and the upper part of the salt discharge structure is communicated with the waste water modulation box through a pipeline. The bottom of the wastewater preparation box is connected with a water outlet pipeline, the water outlet pipeline is divided into a first pipeline and a second pipeline, the first pipeline is in reflux connection with the wastewater preparation box, and the second pipeline is connected with the wastewater drying tower. The bottom of the concentration tower is designed to be conical, so that salt in concentrated wastewater can be conveniently precipitated, and the salt discharge pump is arranged to discharge the salt in time; compared with a direct supply mode, the mode that wastewater is supplied through the large-pipe-diameter backflow pipeline is adopted, under all loads, the high flow speed of wastewater in the pipeline can be kept, the influence of the loads is small, and the risk that the pipeline is blocked in the wastewater conveying process can be effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of desulfurization wastewater pretreatment, and specifically relates to a desulfurization wastewater concentration and evaporation device. Background Art

[0002] Before desulfurization wastewater is dried, the wastewater treatment volume can be reduced by concentrating it, thereby reducing the load on the wastewater treatment system. However, after concentration, the amount of salt precipitation in the wastewater will increase. When the precipitated solids enter the system, the risk of pipeline blockage will increase and equipment wear will be accelerated.

[0003] For example, Chinese patent CN111252993A discloses a system and method for concentrating desulfurization wastewater by evaporating the waste heat of flue gas. The lower discharge port of the concentration tower is directly connected to the thick slurry box, and then the wastewater enters the conditioning box and is finally dehydrated. It can be seen that after concentration, the salt is not processed, which easily increases the risk of pipeline blockage. Utility Model Content

[0004] In view of the above problems, the purpose of the utility model is to provide a desulfurization wastewater concentration and evaporation device.

[0005] The specific technical solutions are as follows:

[0006] A desulfurization wastewater concentration and evaporation device comprises a concentration tower, a wastewater conditioning box and a wastewater drying tower. The bottom of the concentration tower is an inverted cone, forming a salt discharge structure. The bottom of the salt discharge structure is connected to a salt discharge pump. The top of the salt discharge structure is connected to the wastewater conditioning box through a pipeline, so that the wastewater after salting out in the concentration tower is passed into the wastewater conditioning box. The bottom of the wastewater conditioning box is connected to a water outlet pipeline, and the water outlet pipeline is divided into a first pipeline and a second pipeline. The first pipeline is refluxed and connected to the wastewater conditioning box, and the second pipeline is connected to the wastewater drying tower.

[0007] Furthermore, an inlet flue and an outlet flue are provided on the concentration tower. The inlet flue is arranged above the salt discharge structure, and the outlet flue is arranged at the top of the concentration tower.

[0008] Furthermore, a concentrated wastewater discharge pump is provided on the pipeline connecting the concentration tower and the wastewater conditioning tank, and a wastewater reflux pump is provided on the outlet pipeline.

[0009] Furthermore, a wastewater supply regulating valve is provided on the second pipeline.

[0010] Furthermore, the diameters of the outlet pipe, the first pipe and the second pipe are the same, and the inner diameter is ≥32mm

[0011] Furthermore, a spray layer is provided above the interior of the concentration tower, and a stirring device is provided in the wastewater conditioning tank.

[0012] The beneficial effects of the utility model are:

[0013] 1) The bottom of the concentration tower of the utility model is designed to be conical, which is convenient for the precipitation of salt in the wastewater after concentration, and a salt discharge pump is provided to discharge the salt in time;

[0014] 2) The utility model adopts a large-diameter return pipeline to supply wastewater. Compared with the direct supply type, the wastewater in the pipeline can maintain a higher flow rate under various loads, is less affected by the load, and can effectively reduce the risk of pipeline blockage during wastewater transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] In the figure: 1. Concentration tower; 11. Salt discharge structure; 12. Inlet flue; 13. Outlet flue; 14. Spray layer; 2. Wastewater conditioning box; 21. Water outlet pipeline; 211. Wastewater reflux pump; 22. First pipeline; 23. Second pipeline; 231. Wastewater supply regulating valve; 3. Wastewater drying tower; 4. Salt discharge pump; 5. Concentrated wastewater discharge pump. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the drawings in the specification, but the protection scope of the utility model is not limited thereto.

[0018] like Figure 1 As shown, a desulfurization wastewater concentration and evaporation device comprises a concentration tower 1, a wastewater conditioning box 2 and a wastewater drying tower 3. The bottom of the concentration tower 1 is an inverted cone, forming a salt discharge structure 11. The concentration tower 1 is also provided with an inlet flue 12 and an outlet flue 13. The inlet flue 12 is arranged above the salt discharge structure 11, and the outlet flue 13 is arranged at the top of the concentration tower 1. A spray layer 14 is arranged above the inside of the concentration tower 1. The bottom of the salt discharge structure 11 is connected to a salt discharge pump 4. The top of the salt discharge structure 11 is connected to the wastewater conditioning box 2 through a pipeline, and a concentration pump 14 is arranged on the pipeline. The wastewater discharge pump 5 passes the wastewater in the concentration tower 1 into the wastewater modulation tank 2. The wastewater modulation tank 2 is provided with a stirring device. The bottom of the wastewater modulation tank 2 is connected to the outlet pipe 21. The outlet pipe 21 is provided with a wastewater reflux pump 211. The outlet pipe 21 is divided into a first pipe 22 and a second pipe 23. The first pipe 22 refluxes and is connected to the wastewater modulation tank 2. The second pipe 23 is connected to the wastewater drying tower 3. The second pipe 23 is provided with a wastewater supply regulating valve 231. The outlet pipe 21, the first pipe 22 and the second pipe 23 have the same pipe diameter, and the inner diameter is ≥32mm.

[0019] The flue gas enters from the inlet flue 12, exchanges heat with the wastewater sprayed from the spray layer 14, and is then discharged from the outlet flue 13. The desulfurized wastewater precipitates salt in the salt discharge structure 11, and the salt is discharged through the salt discharge pump 4. The wastewater with reduced salt content is discharged through the concentrated wastewater discharge pump 5, and then enters the wastewater adjustment tank 2 for water quality pH adjustment. After adjusting to the target pH, part of it is refluxed to the wastewater adjustment tank 2 through the wastewater reflux pump 211, and part of it is pumped into the wastewater drying tower 3 through the wastewater supply regulating valve 231 for treatment.

Claims

1. A desulfurization wastewater concentration and evaporation device, characterized in that: The invention comprises a concentration tower (1), a wastewater conditioning tank (2) and a wastewater drying tower (3). The bottom of the concentration tower (1) is in an inverted cone shape, forming a salt discharge structure (11). The bottom of the salt discharge structure (11) is connected to a salt discharge pump (4). The top of the salt discharge structure (11) is connected to the wastewater conditioning tank (2) through a pipeline, so that wastewater after salting out in the concentration tower (1) is passed into the wastewater conditioning tank (2). The bottom of the wastewater conditioning tank (2) is connected to a water outlet pipeline (21). The water outlet pipeline (21) is divided into a first pipeline (22) and a second pipeline (23). The first pipeline (22) is refluxed and connected to the wastewater conditioning tank (2), and the second pipeline (23) is connected to the wastewater drying tower (3).

2. A desulfurization wastewater concentration and evaporation device as claimed in claim 1, characterized in that: The concentration tower (1) is provided with an inlet flue (12) and an outlet flue (13), wherein the inlet flue (12) is arranged above the salt discharge structure (11), and the outlet flue (13) is arranged at the top of the concentration tower (1).

3. A desulfurization wastewater concentration and evaporation device as claimed in claim 2, characterized in that: A concentrated wastewater discharge pump (5) is provided on the pipeline connecting the concentration tower (1) and the wastewater conditioning tank (2), and a wastewater reflux pump (211) is provided on the outlet pipeline (21).

4. A desulfurization wastewater concentration and evaporation device as claimed in claim 3, characterized in that: The second pipeline (23) is provided with a wastewater supply regulating valve (231).

5. A desulfurization wastewater concentration and evaporation device as claimed in claim 1, characterized in that: The water outlet pipeline (21), the first pipeline (22) and the second pipeline (23) have the same pipe diameter, and the inner diameter is ≥32 mm.

6. A desulfurization wastewater concentration and evaporation device as claimed in claim 1, characterized in that: A spray layer (14) is provided above the interior of the concentration tower (1), and a stirring device is provided in the wastewater conditioning tank (2).

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