Dry desulfurization reactor device

Abstract

The utility model discloses a dry desulfurization reactor device, which belongs to the technical field of flue gas desulfurization, and comprises a desulfurization tower, which is arranged on a flue gas conveying pipeline for conveying flue gas to be treated and is provided with a discharge port; a desulfurization material agent is arranged in the hopper, and a discharge port of the hopper is communicated with an air inlet of the desulfurization tower through a powder conveying fan; a feed port of the bin pump is communicated with a discharge port of the desulfurization tower, and a discharge port of the bin pump is communicated with a feed port of the hopper. By arranging a closed-loop system composed of the desulfurization tower, the hopper and the bin pump, cyclic utilization of a desulfurization material agent is achieved, the utilization rate of the desulfurization material agent is effectively increased, the operation cost is reduced, meanwhile, the device is compact and simple in structure and easy to operate and maintain, and the equipment investment is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of flue gas desulfurization technology and relates to a dry desulfurization reactor device. Background Technology

[0002] Industrial production processes, especially combustion processes, generate large amounts of harmful gases such as sulfur dioxide (SO2), posing a serious threat to the environment and human health. Desulfurization technology has emerged to reduce the emission of these harmful gases.

[0003] Dry desulfurization, as a highly efficient and environmentally friendly desulfurization method, has gradually gained widespread application. However, traditional dry desulfurization equipment suffers from problems such as low desulfurization efficiency, low feed utilization, and complex equipment.

[0004] Therefore, developing a high-efficiency, simple, and easy-to-operate dry desulfurization reactor to improve desulfurization efficiency and feed utilization, and reduce environmental pollution, has become an urgent technical problem to be solved. Utility Model Content

[0005] To at least address the problem of low feed utilization in existing dry desulfurization devices, the present invention provides the following technical solution: a dry desulfurization reactor device, the device comprising:

[0006] A desulfurization tower, which is installed on a flue gas conveying pipeline for conveying flue gas to be treated, and the desulfurization tower has a discharge port;

[0007] A hopper containing desulfurization agent; the outlet of the hopper is connected to the air inlet of the desulfurization tower via a powder conveying fan.

[0008] The silo pump has its inlet connected to the outlet of the desulfurization tower and its outlet connected to the inlet of the hopper.

[0009] Optionally, in the above-mentioned dry desulfurization reactor device, a baffle is vertically installed inside the desulfurization tower;

[0010] The partition is used to divide the inner cavity of the desulfurization tower into a first desulfurization chamber and a second desulfurization chamber;

[0011] A flue gas inlet is provided on the side wall of the first desulfurization chamber;

[0012] The second desulfurization chamber has a flue gas outlet on its side wall.

[0013] Optionally, in the above-mentioned dry desulfurization reactor device, the desulfurization tower is connected to the flue gas conveying pipeline through an elbow inserted in the flue gas inlet;

[0014] The elbow bends from the inside out along the centerline of the desulfurization tower in a top-to-bottom direction;

[0015] The baffle extends downward from the inner top of the desulfurization tower to below the elbow.

[0016] Optionally, in the above-described dry desulfurization reactor apparatus, the width of the baffle plate is equal to the maximum diameter of the desulfurization tower; or

[0017] The width of the baffle is greater than the diameter of the elbow, and the width of the baffle is less than the maximum diameter of the desulfurization tower.

[0018] Optionally, in the above-mentioned dry desulfurization reactor device, the desulfurization tower includes: a desulfurization section and an ash hopper section;

[0019] The desulfurization section is located above the ash hopper section;

[0020] The ash hopper is conical, and its upper end is connected to the opening end of the desulfurization section.

[0021] The discharge port is located at the bottom of the ash hopper.

[0022] Optionally, in the above-described dry desulfurization reactor apparatus, the apparatus further includes: a first pipeline and a second pipeline;

[0023] The first pipe is used to connect the hopper and the flue gas conveying pipe near the flue gas inlet, and a spray gun is provided at the outlet of the first pipe;

[0024] The second pipe is used to connect the silo pump and the hopper.

[0025] The powder conveying fan is installed on the first pipeline.

[0026] Optionally, in the above-mentioned dry desulfurization reactor device, a level gauge is installed on the top of the desulfurization section;

[0027] A discharge valve is provided between the discharge port and the silo pump;

[0028] The bottom of the hopper is equipped with a discharge valve.

[0029] Optionally, in the above-described dry desulfurization reactor device, both the flue gas inlet and the flue gas outlet are located at the top of the desulfurization tower.

[0030] Optionally, in the above-mentioned dry desulfurization reactor device, when the temperature of the flue gas to be treated entering the desulfurization tower is lower than 140°C, the reaction efficiency of the desulfurization agent is 85% to 92%.

[0031] Optionally, in the above-mentioned dry desulfurization reactor device, the desulfurization agent is either sodium bicarbonate or activated calcium powder;

[0032] The level gauge is a radar level gauge.

[0033] The beneficial effects of the technical solution provided by this utility model embodiment are:

[0034] This application achieves the recycling of desulfurization agents by setting up a closed-loop system consisting of a desulfurization tower, a hopper, and a silo pump. This effectively improves the utilization rate of desulfurization agents, reduces operating costs, and the device has a compact and simple structure that is easy to operate and maintain, thus reducing equipment investment. Attached Figure Description

[0035] Figure 1 A schematic diagram of a dry desulfurization reactor device provided in an embodiment of this utility model;

[0036] Figure 2 A schematic diagram of a desulfurization tower provided in an embodiment of this utility model;

[0037] In the diagram: 1. Hopper; 2. Discharge valve; 3. Powder conveying fan; 4. Spray gun; 5. Flue gas inlet pipe; 6. Elbow; 7. Desulfurization tower; 71. Desulfurization section; 701. First desulfurization chamber; 702. Second desulfurization chamber; 8. Baffle plate; 9. Discharge valve; 10. Silo pump; 11. Radar level gauge; 12. Flue gas outlet; 13. Flue gas outlet pipe; 14. Ash hopper section; 15. First pipe; 16. Second pipe. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0039] In the description of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. The terms "connected," "linked," and "set up" used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a direct connection or an indirect connection through intermediate components; a wired connection, a radio connection, or a wireless communication signal connection. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0040] Please see Figure 1-2 This utility model provides the following technical solution: a dry desulfurization reactor device, comprising: a desulfurization tower 7, a hopper 1, and a silo pump 10. The desulfurization tower 7 is installed on a flue gas conveying pipeline for transporting the flue gas to be treated (also known as raw flue gas). The desulfurization tower 7 has a discharge port, which is typically located at the bottom of the desulfurization tower 7 for easy discharge. The flue gas conveying pipeline consists of a flue gas inlet pipe 5 and a flue gas outlet pipe 13. Figure 1 In the diagram, the desulfurization tower 7 has a flue gas inlet and a flue gas outlet 12 on its left and right side walls, respectively. Preferably, both the flue gas inlet and outlet 12 are located at the top of the desulfurization tower 7. The flue gas inlet is sealed to the flue gas inlet pipe 5 (or detachably connected via flanges or other connectors), and the flue gas outlet 12 is sealed to the flue gas outlet pipe 13 (or detachably connected via flanges or other connectors). A desulfurization agent (such as baking soda or activated calcium powder) is placed in the hopper 1. The outlet of the hopper 1 is connected to the inlet of the desulfurization tower 7 via a powder conveying fan 3. The powder conveying fan 3 adds the desulfurization agent to the flue gas to be treated, allowing the agent to react with the sulfur dioxide in the flue gas. The flue gas carries the desulfurization agent into the desulfurization tower 7, forming a vortex within the tower and increasing the residence time. The inlet of the silo pump 10 is connected to the outlet of the desulfurization tower 7, and the outlet of the silo pump 10 is connected to the inlet of the hopper 1. Unreacted desulfurization agent settles at the bottom of the desulfurization tower 7. When the silo pump 10 is started, it returns the settled desulfurization agent to the hopper 1, achieving the recycling of the desulfurization agent, effectively improving its utilization rate and reducing operating costs. Furthermore, the device of this application has a compact and simple structure, is easy to operate and maintain, and reduces equipment investment and operating costs.

[0041] Reference Figure 2 As shown, a baffle 8 is vertically installed inside the desulfurization tower 7. The baffle 8 divides the inner cavity of the desulfurization tower 7 into a first desulfurization chamber 701 (located on the left) and a second desulfurization chamber 702 (located on the right). An inlet is provided on the side wall of the first desulfurization chamber 701. An outlet 12 is provided on the side wall of the second desulfurization chamber 702. The flue gas to be treated, carrying the desulfurizing agent, first enters the first desulfurization chamber 701 through the inlet, then bypasses the baffle 8, and then enters the second desulfurization chamber 702. This increases the residence time of the flue gas, allowing the desulfurizing agent to react more fully with the sulfur dioxide in the flue gas, improving the desulfurization reaction efficiency of the agent, and thus reducing the emission of harmful gases.

[0042] Furthermore, the desulfurization tower 7 is connected to the flue gas conveying pipeline (referring to the flue gas inlet pipeline 5) via an elbow 6 inserted in the flue gas inlet. This elbow 6 bends from the inside to the outside along the centerline of the desulfurization tower 7 from top to bottom. The baffle 8 is located on the axis of the desulfurization tower 7, extending downward from the inner top of the desulfurization tower 7 to below the elbow 6. That is, the bottom of the baffle 8 is lower than the bottom of the elbow 6. In this way, the baffle 8 can play a certain role in blocking the flue gas to be treated carrying the desulfurization agent, thereby optimizing the flow path of the flue gas in the desulfurization tower 7. Preferably, the width of the baffle 8 is equal to the maximum diameter of the desulfurization tower 7, so that the flue gas entering the first desulfurization chamber 701 flows from top to bottom and enters the second desulfurization chamber 702 through the bottom of the baffle 8; or the width of the baffle 8 is greater than the diameter of the elbow 6 and less than the maximum diameter of the desulfurization tower 7, so that the flue gas entering the first desulfurization chamber 701 can be diverted: part of the flue gas enters the second desulfurization chamber 702 from both sides of the baffle 8, and the other part flows from top to bottom and enters the second desulfurization chamber 702 through the bottom of the baffle 8. Both embodiments can increase the residence time of the flue gas and improve the (desulfurization) reaction efficiency of the desulfurization agent.

[0043] As a specific structural embodiment of the desulfurization tower 7, in this embodiment, the desulfurization tower 7 includes: a desulfurization section 11 and an ash hopper section 14 (hereinafter referred to as the ash hopper). See also Figure 2 As shown, the desulfurization section 11 (which is the location of the first desulfurization chamber 701 and the second desulfurization chamber 702 mentioned above) is located above the ash hopper section 14, and the desulfurization section 11 is the site where the desulfurization reaction takes place. It should be noted that the bottom of the baffle 8 is at a height no lower than the bottom of the desulfurization section 11. The ash hopper section 14 is conical, and its upper end is connected to the opening end of the desulfurization section 11, so that unreacted desulfurization agent is deposited in the ash hopper section 14. The discharge port is located at the bottom of the ash hopper section 14 for easy discharge.

[0044] Reference Figure 1As shown, the device also includes a first pipe 15 and a second pipe 16. The first pipe 15 connects the outlet of the hopper 1 to the flue gas conveying pipe (referring to the flue gas inlet pipe 5) near the flue gas inlet of the desulfurization tower 7. A spray gun 4 is installed at the outlet of the first pipe 15. The second pipe 16 connects the outlet of the silo pump 10 to the inlet of the hopper 1. A powder conveying fan 3 is installed on the first pipe 15. In use, the powder conveying fan 3 draws the desulfurizing agent into the first pipe 15, and the spray gun 4 evenly sprays the desulfurizing agent into the flue gas to be treated entering the flue gas inlet pipe 5, allowing the desulfurizing agent to fully react with the sulfur dioxide in the flue gas. Multiple field tests have verified that when the temperature inside the desulfurization tower 7 is below 140℃, the reaction efficiency of the desulfurizing agent is 85%–92% after the flue gas is fully desulfurized in the two desulfurization chambers of the desulfurization tower 7. Taking sodium bicarbonate as an example of desulfurization agent, it is calculated that about 300 tons of sodium bicarbonate can be saved per year. The price of sodium bicarbonate is 2,650 yuan / ton, which can save about 795,000 yuan in sodium bicarbonate costs per year, which is quite economical.

[0045] A level gauge is installed at the top of the desulfurization section 11, preferably a radar level gauge 11, and is installed at the top of the second desulfurization chamber 702 to monitor the level of incompletely reacted desulfurizing agent deposited in the ash hopper section 14 in real time. A discharge valve 9 is provided between the discharge port and the silo pump 10. Through the discharge valve 9 and the silo pump 10, the deposited incompletely reacted desulfurizing agent is sent back to the hopper 1 for recycling. A discharge valve 2 is provided at the bottom of the hopper 1. In use, the opening of the discharge valve 2 and the discharge valve 9 is adjusted according to the level information monitored by the level gauge to control the flow rate and recycling amount of the desulfurizing agent. This application reduces the emission of harmful gases by improving desulfurization (reaction) efficiency and the utilization rate of desulfurizing agent, which has positive significance for environmental protection and human health.

[0046] As is known from common technical knowledge, this utility model can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this utility model or its equivalents are included in this utility model.

Claims

1. A dry desulfurization reactor device, characterized in that, The device includes: A desulfurization tower, which is installed on a flue gas conveying pipeline for conveying flue gas to be treated, and the desulfurization tower has a discharge port; A hopper containing desulfurization agent; the outlet of the hopper is connected to the air inlet of the desulfurization tower via a powder conveying fan. The silo pump has its inlet connected to the outlet of the desulfurization tower and its outlet connected to the inlet of the hopper.

2. The dry desulfurization reactor apparatus according to claim 1, characterized in that, The desulfurization tower is vertically equipped with baffles; The partition is used to divide the inner cavity of the desulfurization tower into a first desulfurization chamber and a second desulfurization chamber; A flue gas inlet is provided on the side wall of the first desulfurization chamber; The second desulfurization chamber has a flue gas outlet on its side wall.

3. The dry desulfurization reactor apparatus according to claim 2, characterized in that, The desulfurization tower is connected to the flue gas conveying pipeline via an elbow inserted in the flue gas inlet. The elbow bends from the inside out along the centerline of the desulfurization tower in a top-to-bottom direction; The baffle extends downward from the inner top of the desulfurization tower to below the elbow.

4. The dry desulfurization reactor apparatus according to claim 3, characterized in that, The width of the baffle plate is equal to the maximum diameter of the desulfurization tower; or The width of the baffle is greater than the diameter of the elbow, and the width of the baffle is less than the maximum diameter of the desulfurization tower.

5. The dry desulfurization reactor apparatus according to claim 1, characterized in that, The desulfurization tower includes a desulfurization section and an ash hopper section; The desulfurization section is located above the ash hopper section; The ash hopper is conical, and its upper end is connected to the opening end of the desulfurization section. The discharge port is located at the bottom of the ash hopper.

6. The dry desulfurization reactor apparatus according to claim 2, characterized in that, The device further includes: a first pipe and a second pipe; The first pipe is used to connect the hopper and the flue gas conveying pipe near the flue gas inlet, and a spray gun is provided at the outlet of the first pipe; The second pipe is used to connect the silo pump and the hopper; The powder conveying fan is installed on the first pipeline.

7. The dry desulfurization reactor apparatus according to claim 5, characterized in that, A level gauge is installed on the top of the desulfurization section; A discharge valve is provided between the discharge port and the silo pump; The bottom of the hopper is equipped with a discharge valve.

8. The dry desulfurization reactor apparatus according to claim 2, characterized in that, Both the flue gas inlet and the flue gas outlet are located at the top of the desulfurization tower.

9. The dry desulfurization reactor apparatus according to claim 7, characterized in that, The desulfurization agent is either sodium bicarbonate or active calcium powder; The level gauge is a radar level gauge.

Images