Energy-saving desulfurization wastewater treatment device

Abstract

The utility model discloses an energy-saving desulfurization wastewater treatment device which comprises a treatment box, a desulfurization tower is arranged on one side of the treatment box, a vertical partition plate is arranged at the bottom in the treatment box and divides the treatment box into a first treatment area and a second treatment area, and a fixing plate is further arranged at the upper end of the left side wall of the treatment box in a downwards inclined mode. A filter screen is arranged between the lower end of the fixing plate and the partition plate, a monitor used for detecting the concentration of slurry is arranged in the second treatment area, the second treatment area is connected to a spraying structure in the desulfurization tower through a pipeline, a second treatment box is arranged below the treatment box and comprises a third treatment area and a fourth treatment area, and the lower end of the fourth treatment area is connected to a flocculation box. And the flocculation box is connected to the concentration clarification box. According to the utility model, the desulfurization wastewater is pre-filtered, the concentration of the filtered wastewater is detected, and the wastewater is recycled or directly treated according to a detection structure, so that the energy of desulfurization slurry is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas desulfurization treatment auxiliary equipment, in particular to an energy-saving desulfurization wastewater treatment device. Background Art

[0002] Existing combustion flue gas needs to be treated by desulfurization and denitrification before it can be discharged into the air. One of the main ways to desulfurize flue gas is to use desulfurization slurry for wet desulfurization, and when the flue gas is wet desulfurized, desulfurization wastewater will be generated. Conventional treatment methods for desulfurization wastewater include neutralization, sedimentation, flocculation, and concentration clarification; however, the wastewater generated after the desulfurization slurry is sprayed on the flue gas is directly subjected to neutralization reaction. There is a problem of insufficient slurry utilization in subsequent steps, and then there is a problem of excessive energy consumption, and there is room for improvement. Utility Model Content

[0003] The purpose of the utility model is to provide a desulfurization wastewater treatment device which can effectively treat desulfurization wastewater and achieve energy saving in view of the deficiencies existing in the above-mentioned background technology.

[0004] In order to achieve the above purpose, the utility model is an energy-saving desulfurization wastewater treatment device, which adopts the following technical solutions:

[0005] An energy-saving desulfurization wastewater treatment device comprises a treatment box, a desulfurization tower is arranged on one side of the treatment box, a vertical partition is arranged at the bottom of the treatment box, there is a gap between the partition and the top of the treatment box, the partition divides the treatment box into a first treatment area and a second treatment area, the lower end of the desulfurization tower is connected to the upper part of the left side wall of the treatment box, the upper end of the left side wall of the treatment box is also inclined downward to be provided with a fixed plate, the lower end of the fixed plate is lower than the upper end of the partition, a filter is arranged between the lower end of the fixed plate and the partition, a monitor for detecting slurry concentration is arranged in the second treatment area, and a monitor for detecting slurry concentration is arranged at the lower end of the left side wall of the treatment box in the first treatment area There is a first discharge port, and a second discharge port is provided at the right end of the bottom of the treatment box of the second treatment zone. The second treatment zone is connected to the spray structure in the desulfurization tower through a pipeline. A second treatment box is provided below the treatment box, and a second partition is provided upward from the bottom of the second treatment box. The second partition contacts the top of the second treatment box. The second partition divides the second treatment box into a third treatment zone and a fourth treatment zone. The second discharge port is connected to the third treatment zone. The outer side of the third treatment zone is connected to the fourth treatment zone through a second pipeline. The lower end of the fourth treatment zone is connected to the flocculation box, and the flocculation box is connected to the concentration and clarification box.

[0006] A further improvement of the energy-saving desulfurization wastewater treatment device of the utility model is that the left and right ends of the second treatment box protrude from the left and right ends of the treatment box respectively, and the protruding parts are respectively provided with stirring structures extending into the third treatment area and the fourth treatment area.

[0007] A further improvement of the energy-saving desulfurization wastewater treatment device of the utility model is that the filter screen is detachably connected to the fixed plate and the partition plate by bolts.

[0008] A further improvement of the energy-saving desulfurization wastewater treatment device of the utility model is that the connection between the first treatment area and the desulfurization tower is higher than the partition.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] The utility model pre-filters desulfurization wastewater, detects the concentration of the filtered wastewater, recycles it or directly treats it according to the detection structure, thereby realizing energy-saving treatment of desulfurization slurry; on the other hand, the treatment box and the second treatment box are stacked close to each other, which saves space and also enables the sediments in the three treatment areas in the two treatment boxes to be collected and treated in a centralized manner, thereby improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] In the figure: 1 desulfurization tower, 2 treatment box, 3 partition, 4 first treatment area, 5 second treatment area, 6 fixed plate, 7 filter, 8 detector, 9 third treatment area, 10 fourth treatment area, 11 pipeline, 12 second pipeline, 13 flocculation box, 14 concentration and clarification box, 15 second partition. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0014] like Figure 1As shown, an energy-saving desulfurization wastewater treatment device includes a treatment box 2, a desulfurization tower 1 is arranged on one side of the treatment box, a vertical partition 3 is arranged at the bottom of the treatment box, there is a gap between the partition and the top of the treatment box, the partition divides the treatment box into a first treatment area 4 and a second treatment area 5, and the lower end of the desulfurization tower is connected to the upper part of the left side wall of the treatment box, that is, the desulfurization tower is connected to the first treatment area. A fixed plate 6 is also tilted downward at the upper end of the left side wall of the treatment box, the lower end of the fixed plate is lower than the upper end of the partition, and a filter screen 7 is arranged between the lower end of the fixed plate and the partition. A monitor 8 for detecting slurry concentration is arranged in the second treatment area, a first discharge port is arranged at the lower end of the left side wall of the treatment box of the first treatment area, and a second discharge port is arranged at the right end of the bottom of the treatment box of the second treatment area, and the second treatment area is connected to the spray structure in the desulfurization tower through a pipeline 11. A second treatment box is provided below the treatment box, a second partition 15 is provided upward from the bottom of the second treatment box, the second partition abuts against the top of the second treatment box, and the second partition divides the second treatment box into a third treatment area 9 and a fourth treatment area 10, the second discharge port is connected to the third treatment area, the outer side of the third treatment area is connected to the fourth treatment area through a second pipeline 12, the lower end of the fourth treatment area is connected to a flocculation box 13, and the flocculation box is connected to a concentration and clarification box 14. Both the third treatment area and the fourth treatment area are provided with a dosing port.

[0015] The left and right ends of the second treatment box protrude from the left and right ends of the treatment box, respectively, and the protruding parts are provided with stirring structures extending into the third treatment area and the fourth treatment area. Alternatively, another embodiment is that the third treatment area can also half-cover the second treatment area, that is, the cross-section of the third treatment area is L-shaped. The second treatment area and the third treatment area are connected by an external pipeline and a pump. At this time, the heat generated during the neutralization reaction in the third treatment area can be exchanged with the desulfurization slurry, thereby facilitating its recycling and having a better desulfurization efficiency.

[0016] The filter screen is detachably connected to the fixed plate and the partition through bolts. The connection between the first treatment area and the desulfurization tower is higher than the partition.

[0017] The working principle of the utility model is as follows: after the desulfurization slurry is sprayed on the flue gas, it enters the first treatment area of ​​the treatment box. At this time, the desulfurization wastewater carries the sediment into the first treatment area, and the impurity sediment falls on the bottom of the first treatment area. The desulfurization wastewater overflows to the second treatment area. The second treatment area detects the slurry concentration and performs slurry circulation desulfurization treatment according to the detection structure, or directly enters the third treatment area, and then adds drugs for neutralization. After the neutralization reaction is completed, it enters the fourth treatment area, and the heavy metal sedimentation agent is added for treatment again, and then flocculation treatment, concentration and clarification treatment are carried out in sequence.

[0018] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. An energy-saving desulfurization wastewater treatment device, characterized in that: The invention comprises a treatment box, a desulfurization tower is arranged on one side of the treatment box, a vertical partition is arranged at the bottom of the treatment box, a gap is formed between the partition and the top of the treatment box, the partition divides the treatment box into a first treatment area and a second treatment area, the lower end of the desulfurization tower is connected to the upper part of the left side wall of the treatment box, the upper end of the left side wall of the treatment box is also inclined downward to provide a fixed plate, the lower end of the fixed plate is lower than the upper end of the partition, a filter is arranged between the lower end of the fixed plate and the partition, a monitor for detecting the concentration of slurry is arranged in the second treatment area, a first discharge port is arranged at the lower end of the left side wall of the treatment box in the first treatment area, a second discharge port is arranged at the right end of the bottom of the treatment box in the second treatment area, the second treatment area is connected to the spray structure in the desulfurization tower through a pipeline, a second treatment box is arranged below the treatment box, a second partition is arranged upward at the bottom of the second treatment box, the second partition contacts the top of the second treatment box, the second partition divides the second treatment box into a third treatment area and a fourth treatment area, the second discharge port is connected to the third treatment area, the outer side of the third treatment area is connected to the fourth treatment area through a second pipeline, the lower end of the fourth treatment area is connected to the flocculation box, and the flocculation box is connected to the concentration and clarification box.

2. An energy-saving desulfurization wastewater treatment device according to claim 1, characterized in that: The left and right ends of the second processing box protrude from the left and right ends of the processing box respectively, and stirring structures extending into the third processing area and the fourth processing area are respectively arranged on the protruding parts.

3. An energy-saving desulfurization wastewater treatment device according to claim 2, characterized in that: The filter screen is detachably connected to the fixing plate and the partition plate by bolts.

4. The energy-saving desulfurization wastewater treatment device according to claim 3 is characterized in that: The connection between the first treatment zone and the desulfurization tower is higher than the partition.

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