Recycling device for circulating liquid of desulfurizing tower

Abstract

The utility model discloses a desulfurization tower circulating liquid recycling device, which relates to the technical field of desulfurization equipment and comprises a settling tank, a filter tank is arranged on one side of the settling tank, an ion exchanger is arranged behind the settling tank and the filter tank, and a backflow monitoring mechanism is arranged at the upper end of the settling tank. A first water pump is fixedly installed at the upper end of the filter box, a first filter assembly, a second filter assembly and a third filter assembly are sequentially arranged in the filter box from top to bottom, and a first communicating pipe is fixedly installed at the water suction end of the first water pump. According to the utility model, by effectively removing impurities such as fly ash and heavy metal ions in the circulating liquid, the interference of the impurities on the desulfurization reaction is reduced, and the reaction activity of a desulfurizer and pollutants such as sulfur dioxide is improved, so that the desulfurization efficiency is remarkably improved, and the discharged flue gas is ensured to reach the environmental protection standard.

Description

Technical Field

[0001] This utility model relates to the field of desulfurization equipment technology, and in particular to a desulfurization tower circulating liquid recycling device. Background Technology

[0002] In modern industrial production, many industries such as power, steel, and chemicals generate large amounts of flue gas containing sulfur dioxide and other acidic gases during the combustion of sulfur-containing fuels. If these acidic gases are emitted directly without effective treatment, they will cause serious air pollution, leading to acid rain and a series of other environmental problems. Therefore, desulfurization technology has become an indispensable part of industrial waste gas treatment. The desulfurization tower, as the core desulfurization equipment, operates primarily based on physical and chemical absorption. Physical absorption utilizes the difference in solubility of gases in liquids to dissolve acidic gases in the absorbent, while chemical absorption fixes and removes the acidic gases through a chemical reaction between the absorbent and the gas. In this process, the circulating liquid in the desulfurization tower plays a crucial role. The circulating liquid not only provides a liquid environment for the desulfurization reaction, but the desulfurizing agent within it also reacts with sulfur dioxide and other acidic gases in the flue gas, achieving the removal of these gases.

[0003] However, in the existing technology, during long-term use, the circulating liquid of the desulfurization tower will gradually accumulate impurities such as fly ash and heavy metal ions. These impurities will not only interfere with the desulfurization reaction and reduce the reactivity of the desulfurizing agent with pollutants such as sulfur dioxide, leading to a decrease in desulfurization efficiency and making it difficult for the flue gas emissions to meet environmental protection standards, but will also cause corrosion and wear to the desulfurization tower and related equipment, shortening the service life of the equipment. Utility Model Content

[0004] The purpose of this invention is to solve the problem of reduced desulfurization efficiency due to impurity accumulation in the circulating liquid of desulfurization towers in the existing technology, and to propose a device for recycling and utilizing the circulating liquid of desulfurization towers.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a desulfurization tower circulating liquid recycling device, comprising a sedimentation tank, a filter box arranged on one side of the sedimentation tank, an ion exchanger arranged behind the sedimentation tank and the filter box, a reflux monitoring mechanism arranged at the upper end of the sedimentation tank, a No. 1 water pump fixedly installed at the upper end of the filter box, and a No. 1 filter assembly, a No. 2 filter assembly, and a No. 3 filter assembly arranged sequentially from top to bottom inside the filter box, a No. 1 connecting pipe fixedly installed at the suction end of the No. 1 water pump, and a No. 2 connecting pipe fixedly installed at the outlet end of the No. 1 water pump.

[0006] Preferably, a first-shaped tube is installed through one end of the ion exchanger, a second water pump is fixedly installed at the upper end of the filter box, a second-shaped tube is fixedly installed at the suction end of the second water pump, and a third-shaped tube is fixedly installed at the outlet end of the second water pump.

[0007] Preferably, the backflow monitoring mechanism includes a monitoring box, one of the water outlets of the monitoring box is fixedly equipped with a No. 1 solenoid valve, and the other water outlet of the monitoring box is fixedly equipped with a No. 2 solenoid valve.

[0008] Preferably, the other end of the first connecting pipe is inserted into the interior of the sedimentation tank, the other end of the second connecting pipe is inserted into the interior of the filter tank, and one end of the first filter assembly, the second filter assembly, and the third filter assembly are respectively inserted into the interior of the three reserved holes in the filter tank.

[0009] Preferably, the other end of the second shaped tube is inserted into the inside of the filter box, and the other end of the third shaped tube is inserted into the inside of the ion exchanger.

[0010] Preferably, one end of the No. 1 solenoid valve is fixedly connected to the No. 3 connecting pipe, one end of the No. 2 solenoid valve is fixedly connected to the return pipe, and the other end of the No. 3 connecting pipe is inserted into the interior of the sedimentation tank.

[0011] Preferably, an inlet pipe is installed through the upper end of the sedimentation tank, a control system is fixedly installed at the front end of the sedimentation tank, the first solenoid valve and the second solenoid valve are both connected to the control system, the ion exchanger is connected to the control system, and the first water pump and the second water pump are both connected to the control system.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0013] 1. In this utility model, the desulfurization efficiency is improved by effectively removing impurities such as fly ash and heavy metal ions from the circulating liquid, reducing the interference of impurities on the desulfurization reaction, and improving the reactivity of the desulfurizing agent with pollutants such as sulfur dioxide, thereby significantly improving the desulfurization efficiency and ensuring that the emitted flue gas meets environmental protection standards.

[0014] 2. In this utility model, the equipment life is extended: the corrosion and wear of impurities in the circulating liquid on the desulfurization tower and related equipment are reduced, the service life of the equipment is extended, the frequency of equipment maintenance and replacement is reduced, and the production cost is reduced.

[0015] 3. In this utility model, intelligent operation is achieved: the circulating liquid reflux and monitoring module realizes real-time monitoring and intelligent control of the purification process, and can adjust the device operating parameters in a timely manner according to the actual situation of the circulating liquid, so as to ensure the stability and reliability of the purification effect. Attached Figure Description

[0016] Figure 1 This utility model provides a three-dimensional structural schematic diagram of a desulfurization tower circulating liquid recovery and utilization device;

[0017] Figure 2This utility model provides a front structural schematic diagram of a desulfurization tower circulating liquid recovery and utilization device;

[0018] Figure 3 This utility model provides a half-sectional view of the filter box of a desulfurization tower circulating liquid recovery and utilization device;

[0019] Figure 4 This utility model presents a schematic diagram of the sedimentation tank and ion exchanger of a desulfurization tower circulating liquid recycling device.

[0020] Legend: 1. Sedimentation tank; 11. Inlet pipe; 12. Control system; 2. Filter box; 21. No. 1 water pump; 22. No. 1 filter assembly; 23. No. 1 connecting pipe; 24. No. 2 connecting pipe; 25. No. 2 filter assembly; 26. No. 3 filter assembly; 3. Ion exchanger; 31. No. 1 special-shaped tube; 4. No. 2 water pump; 41. No. 2 special-shaped tube; 42. No. 3 special-shaped tube; 5. Reflux monitoring mechanism; 51. Monitoring box; 52. No. 1 solenoid valve; 53. No. 2 solenoid valve; 54. No. 3 connecting pipe; 55. Reflux pipe. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0023] Example 1: As Figure 1 - Figure 4 As shown, this utility model provides a desulfurization tower circulating liquid recycling device, including a sedimentation tank 1, a filter box 2 is provided on one side of the sedimentation tank 1, an ion exchanger 3 is provided behind the sedimentation tank 1 and the filter box 2, a reflux monitoring mechanism 5 is provided at the upper end of the sedimentation tank 1, a No. 1 water pump 21 is fixedly installed at the upper end of the filter box 2, and a No. 1 filter assembly 22, a No. 2 filter assembly 25 and a No. 3 filter assembly 26 are arranged sequentially from top to bottom inside the filter box 2. A No. 1 connecting pipe 23 is fixedly installed at the suction end of the No. 1 water pump 21, and a No. 2 connecting pipe 24 is fixedly installed at the outlet end of the No. 1 water pump 21. The other end of the No. 1 connecting pipe 23 is inserted into the interior of the sedimentation tank 1, and the other end of the No. 2 connecting pipe 24 is inserted into the interior of the filter box 2. One end of the No. 1 filter assembly 22, the No. 2 filter assembly 25 and the No. 3 filter assembly 26 are respectively inserted into the interior of the three reserved holes of the filter box 2.

[0024] The specific setup and function of this embodiment are described below. The circulating liquid of the desulfurization tower is introduced into the sedimentation tank 1 through the inlet pipe 11. Inside the sedimentation tank 1, the flow rate of the circulating liquid slows down, and larger particles of fly ash and other impurities gradually settle to the bottom of the tank under the action of gravity. Then, by controlling the No. 1 water pump 21 and cooperating with the No. 1 connecting pipe 23, the settled circulating liquid inside the sedimentation tank 1 is sucked away and enters the interior of the filter tank 2 through the No. 2 connecting pipe 24. The circulating liquid passes through the No. 1 filter assembly 22, the No. 2 filter assembly 25 and the No. 3 filter assembly 26 one by one. Through the three layers of filtration, smaller particles of impurities can be further filtered out, and fly ash and heavy metal ions and other impurities in the circulating liquid can be effectively removed. This reduces the interference of impurities on the desulfurization reaction, improves the reactivity of the desulfurizing agent with pollutants such as sulfur dioxide, thereby significantly improving the desulfurization efficiency and ensuring that the emission of flue gas meets environmental protection standards.

[0025] By providing a sludge discharge port at the bottom of the sedimentation tank 1, the settled impurities can be discharged periodically.

[0026] Example 2: Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a first-shaped tube 31 is installed through one end of the ion exchanger 3. A second-shaped water pump 4 is fixedly installed at the upper end of the filter box 2. A second-shaped tube 41 is fixedly installed at the suction end of the second-shaped water pump 4. A third-shaped tube 42 is fixedly installed at the outlet end of the second-shaped water pump 4. The other end of the second-shaped tube 41 is inserted into the inside of the filter box 2, and the other end of the third-shaped tube 42 is inserted into the inside of the ion exchanger 3.

[0027] The overall effect of this embodiment is that the ion exchanger 3 is equipped with a regeneration device. By controlling the second water pump 4, the second water pump 4 draws away the filtered circulating liquid inside the filter box 2 through the second special-shaped pipe 41, and enters the interior of the ion exchanger 3 through the third special-shaped pipe 42. The circulating liquid is controlled to pass through the ion exchanger 3 at an appropriate flow rate. Heavy metal ions undergo an exchange reaction with the active groups on the ion exchange resin and are adsorbed. When the concentration difference of heavy metal ions at the inlet and outlet of the ion exchanger 3 reaches a set value, it indicates that the resin is close to adsorption saturation. The regeneration device is then activated, and a regenerant is injected into the ion exchange column. The regenerant reacts with the heavy metal ions adsorbed on the resin, washing off the heavy metal ions. The regenerated ion exchange resin is then treated through a wastewater treatment system, and the regenerated ion exchange resin regains its adsorption capacity and can continue to be used for the purification of the circulating liquid.

[0028] Example 3: Figure 1 , Figure 2 and Figure 4As shown, the reflux monitoring mechanism 5 includes a monitoring box 51. A first solenoid valve 52 is fixedly installed at one of the outlet ends of the monitoring box 51, and a second solenoid valve 53 is fixedly installed at the other outlet end of the monitoring box 51. One end of the first solenoid valve 52 is fixedly connected to a third connecting pipe 54, and one end of the second solenoid valve 53 is fixedly connected to a reflux pipe 55. The other end of the third connecting pipe 54 is inserted into the interior of the sedimentation tank 1. An inlet pipe 11 is installed through the upper end of the sedimentation tank 1. A control system 12 is fixedly installed at the front end of the sedimentation tank 1. The first solenoid valve 52 and the second solenoid valve 53 are both connected to the control system 12. The ion exchanger 3 is connected to the control system 12. The first water pump 21 and the second water pump 4 are both connected to the control system 12.

[0029] The overall effect of this embodiment is as follows: the purified circulating liquid enters the monitoring tank 51 through the first special-shaped pipe 31. The sensors inside the monitoring tank 51 detect the entering circulating liquid and can collect data such as impurity content, pH value, and density in real time. The data is transmitted to the control system 12. The control system 12 analyzes and processes the data according to the preset parameter range. When it finds that some parameters are out of the normal range, such as an increase in impurity content, the control system 12 will control the first solenoid valve 52 and the second solenoid valve 53. At this time, the second solenoid valve 53 will be closed and the first solenoid valve 52 will be opened, so that the circulating liquid inside the monitoring tank 51 enters the sedimentation tank 1 through the first solenoid valve 52 and the third connecting pipe 54. This facilitates the continued processing of unqualified circulating liquid. By increasing the amount of precipitant added to the sedimentation tank 1 or adjusting the backwashing frequency of the filter, when the pH value is abnormal, the control system 12 adjusts the amount of acid-base regulator added to ensure the stability of the circulating liquid quality and ensure the efficient operation of the desulfurization tower.

[0030] By setting a return pipe 55 at one end of the second solenoid valve 53, the second solenoid valve 53 is in the open state when the circulating liquid is qualified, so that the circulating liquid inside the monitoring box 51 can enter the interior of the desulfurization tower through the second solenoid valve 53 and the return pipe 55.

[0031] The operating method and working principle of this device are as follows: First, connect the pipe from which the circulating liquid is discharged from the desulfurization tower to the inlet pipe 11, and then connect the return pipe 55 to the inlet pipe 11 inside the desulfurization tower. When it is necessary to recycle the circulating liquid inside the desulfurization tower, the circulating liquid inside the desulfurization tower is introduced into the sedimentation tank 1 through the inlet pipe 11. At this time, larger particles of fly ash and other impurities gradually settle to the bottom of the tank under the action of gravity. Then, by controlling the No. 1 water pump 21, and in conjunction with the No. 1 connecting pipe 23, the settled circulating liquid inside the sedimentation tank 1 is sucked away and enters the interior of the filter box 2 through the No. 2 connecting pipe 24. The circulating liquid then passes through the No. 1 filter assembly 22 one by one. The second filter assembly 25 and the third filter assembly 26 can filter the circulating liquid layer by layer. Then, by controlling the second water pump 4, the second water pump 4 draws away the filtered circulating liquid from the filter box 2 through the second special-shaped pipe 41, and enters the ion exchanger 3 through the third special-shaped pipe 42. The circulating liquid is controlled to pass through the ion exchanger 3 at an appropriate flow rate. Heavy metal ions exchange with the active groups on the ion exchange resin and are adsorbed. The purified circulating liquid enters the monitoring box 51 through the first special-shaped pipe 31. The sensors inside the monitoring box 51 detect the entering circulating liquid and can collect data such as impurity content, pH value, and density in real time. The data is transmitted to the control system 12. The control system 12 analyzes and processes the data according to the preset parameter range. If it is qualified, the control system 12 will close the first solenoid valve 52 and open the second solenoid valve 53, so that the circulating liquid can enter the return pipe 55 from the inside of the monitoring box 51 through the second solenoid valve 53 and flow into the desulfurization tower.

[0032] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A desulfurization tower circulating liquid recovery and utilization device, comprising a sedimentation tank (1), characterized in that: A filter box (2) is provided on one side of the sedimentation tank (1). An ion exchanger (3) is provided behind the sedimentation tank (1) and the filter box (2). A reflux monitoring mechanism (5) is provided at the upper end of the sedimentation tank (1). A No. 1 water pump (21) is fixedly installed at the upper end of the filter box (2). A No. 1 filter assembly (22), a No. 2 filter assembly (25), and a No. 3 filter assembly (26) are arranged sequentially from top to bottom inside the filter box (2). A No. 1 connecting pipe (23) is fixedly installed at the suction end of the No. 1 water pump (21). A No. 2 connecting pipe (24) is fixedly installed at the outlet end of the No. 1 water pump (21).

2. The desulfurization tower circulating liquid recovery and utilization device according to claim 1, characterized in that: One end of the ion exchanger (3) is connected to a first-shaped tube (31), the upper end of the filter box (2) is fixedly connected to a second-shaped water pump (4), the suction end of the second-shaped water pump (4) is fixedly connected to a second-shaped tube (41), and the outlet end of the second-shaped water pump (4) is fixedly connected to a third-shaped tube (42).

3. The desulfurization tower circulating liquid recovery and utilization device according to claim 2, characterized in that: The backflow monitoring mechanism (5) includes a monitoring box (51), one of the outlet ends of the monitoring box (51) is fixedly equipped with a first solenoid valve (52), and the other outlet end of the monitoring box (51) is fixedly equipped with a second solenoid valve (53).

4. The desulfurization tower circulating liquid recovery and utilization device according to claim 1, characterized in that: The other end of the first connecting pipe (23) is inserted into the interior of the sedimentation tank (1), the other end of the second connecting pipe (24) is inserted into the interior of the filter box (2), and one end of the first filter assembly (22), the second filter assembly (25) and the third filter assembly (26) are respectively inserted into the interior of the three reserved holes of the filter box (2).

5. The desulfurization tower circulating liquid recovery and utilization device according to claim 2, characterized in that: The other end of the second shaped tube (41) is inserted into the inside of the filter box (2), and the other end of the third shaped tube (42) is inserted into the inside of the ion exchanger (3).

6. The desulfurization tower circulating liquid recovery and utilization device according to claim 3, characterized in that: One end of the No. 1 solenoid valve (52) is fixedly connected to the No. 3 connecting pipe (54), one end of the No. 2 solenoid valve (53) is fixedly connected to the return pipe (55), and the other end of the No. 3 connecting pipe (54) is inserted into the interior of the sedimentation tank (1).

7. The desulfurization tower circulating liquid recovery and utilization device according to claim 6, characterized in that: The upper end of the sedimentation tank (1) is connected to the liquid inlet pipe (11), and the front end of the sedimentation tank (1) is fixedly connected to the control system (12). The first solenoid valve (52) and the second solenoid valve (53) are both connected to the control system (12). The ion exchanger (3) is connected to the control system (12). The first water pump (21) and the second water pump (4) are both connected to the control system (12).

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