Flue gas desulfurization waste heat recycling device

Abstract

The utility model relates to the field of flue gas desulfurization, in particular to a flue gas desulfurization waste heat recycling device which comprises a desulfurization tower, one end of the desulfurization tower is connected with a recovery device through a pipeline, and the recovery device comprises a box body, a cavity, a heat exchange pipe, a first flue gas pipe, a second flue gas pipe, a gas inlet pipe and a gas outlet pipe. The cavity is formed in the side wall of the box body, the two ends of the heat exchange pipe are connected with a first flue gas pipe and a second flue gas pipe respectively, and the first flue gas pipe is connected with a flue gas discharge pipe of a desulfurization tower; according to the utility model, the recovery device is connected with the desulfurization tower, flue gas discharged from the desulfurization tower enters the heat exchange pipe, and waste heat in the flue gas is transferred to water in the box body by using the heat exchange pipe, so that the heat in the flue gas is utilized; and the phenomenon of heat waste caused by the fact that waste heat in the flue gas automatically drifts away along with discharge of the flue gas is avoided.

Description

Technical Field

[0001] This utility model relates to the field of flue gas desulfurization, specifically to a device for recycling waste heat from flue gas desulfurization. Background Technology

[0002] Flue gas desulfurization is the process of removing sulfur dioxide from industrial emissions. This process is of great significance for reducing air pollution and protecting the environment, especially in places where large amounts of sulfur-containing fuels are used, such as coal-fired power plants.

[0003] The commonly used desulfurization device is the desulfurization tower. Flue gas is passed into the desulfurization tower, and the absorbent in the desulfurization tower reacts with the sulfur dioxide in the flue gas to achieve desulfurization. After desulfurization, the flue gas is discharged from the desulfurization tower. At this time, the flue gas itself will have residual heat. This residual heat will be directly lost with the discharge of the flue gas, resulting in energy waste. Utility Model Content

[0004] Based on the above description, this utility model provides a waste heat recycling device for flue gas desulfurization to solve the problem of heat waste after flue gas emission in existing flue gas desulfurization.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A flue gas desulfurization waste heat recycling device, including a desulfurization tower, one end of which is connected to a recovery device through a pipeline;

[0006] The recovery device includes a housing, a cavity, a heat exchange tube, a first flue gas pipe, a second flue gas pipe, an inlet pipe, and an outlet pipe. The cavity is located in the side wall of the housing. The two ends of the heat exchange tube are connected to the first flue gas pipe and the second flue gas pipe, respectively. The first flue gas pipe is connected to the flue gas discharge pipe of the desulfurization tower. The heat exchange tube is designed as a spiral and is installed in the inner cavity of the cavity. The side wall of the heat exchange tube is in contact with the inner wall of the cavity. The end of the heat exchange tube away from the desulfurization tower passes through the side wall of the housing.

[0007] The air inlet pipe is installed at the bottom of the housing, and the air outlet pipe is installed at the top of the housing.

[0008] Furthermore, one end of the air inlet pipe passes through the side wall of the housing and enters the inner cavity of the cavity, and one end of the air outlet pipe is connected to the cavity of the housing. Both the end faces of the air inlet pipe and the air outlet pipe are equipped with farad plates.

[0009] Based on the above technical solution, the present invention can be further improved as follows.

[0010] Furthermore, the recycling device also includes a water inlet pipe and a drain pipe. The water inlet pipe is fixedly installed on one side of the top of the tank, and the drain pipe is fixedly installed on the bottom of the side wall of the tank, and the drain pipe is connected to the inner cavity of the tank.

[0011] Furthermore, a sealing plug is provided in the inner cavity of the water inlet pipe, and a valve is installed on the surface of the drain pipe.

[0012] Furthermore, the recycling device also includes a partition plate, which is fixedly installed on the inner wall of the cavity of the housing, and the partition plate and the heat exchange tubes are arranged at intervals.

[0013] Furthermore, the partition is designed as a spiral, and the side wall of the partition is fixedly connected to the inner wall of the cavity away from the heat exchange tube, with a gap between the partition and the heat exchange tube.

[0014] Furthermore, the end of the second flue gas pipe away from the heat exchange tube passes through the side wall of the cavity, and a flange is provided after the second flue gas pipe passes through the side wall of the cavity.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0016] 1. This utility model connects to the desulfurization tower by setting up a recovery device, allowing the flue gas discharged from the desulfurization tower to enter the heat exchange tube. The heat exchange tube is used to transfer the residual heat in the flue gas to the water in the chamber, thereby utilizing the heat in the flue gas and preventing the residual heat in the flue gas from automatically dissipating with the discharge of the flue gas, which would otherwise result in heat waste.

[0017] 2. By installing baffles in the cavity, the internal space of the cavity is divided. The baffles are threaded like the heat exchange tubes and are spaced apart from each other, ensuring that the gas introduced into the air to absorb heat can have sufficient contact time with the heat exchange tubes, thus achieving a better heat absorption effect. Attached Figure Description

[0018] Figure 1 A schematic diagram of a waste heat recycling device for flue gas desulfurization provided in this embodiment of the present invention;

[0019] Figure 2 This is a three-dimensional structural diagram of the recycling device in this utility model;

[0020] Figure 3 This is a cross-sectional perspective view of the recycling device in this utility model;

[0021] Figure 4 This is a top-view three-dimensional structural diagram of the recycling device in this utility model.

[0022] The attached diagram lists the components represented by each number as follows:

[0023] 1. Desulfurization tower; 2. Recovery device; 201. Box body; 202. First flue gas pipe; 203. Second flue gas pipe; 204. Inlet pipe; 205. Outlet pipe; 206. Water inlet pipe; 207. Drain pipe; 208. Heat exchanger pipe; 209. Baffle plate; 210. Cavity. Detailed Implementation

[0024] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0026] It should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the technical product is in use. They are used only for the convenience of describing the technology and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the technology. Furthermore, "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. Therefore, the terms "first," "second," "third," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0027] In the description of this technology, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this technology based on the specific circumstances.

[0028] Please see Figure 1 and Figure 2 A waste heat recycling device for flue gas desulfurization includes a desulfurization tower 1, one end of which is connected to a recovery device 2 via a pipeline.

[0029] The recovery device 2 includes a housing 201, a cavity 210, a heat exchange tube 208, a first flue gas pipe 202, a second flue gas pipe 203, an inlet pipe 204, and an outlet pipe 205. The cavity 210 is located in the side wall of the housing 201. The two ends of the heat exchange tube 208 are connected to the first flue gas pipe 202 and the second flue gas pipe 203, respectively. The first flue gas pipe 202 is connected to the flue gas discharge pipe of the desulfurization tower 1, and the heat exchange tube 208 is designed in a spiral shape. Meanwhile, the heat exchange tube 208 is installed in the inner cavity of the cavity 210, and the side wall of the heat exchange tube 208 is in contact with the inner wall of the cavity 210. The end of the heat exchange tube 208 away from the desulfurization tower 1 passes through the side wall of the box 201. The heat exchange tube 208 is used to guide the flue gas to circulate, and the residual heat in the flue gas will be transferred to the box 201 through the heat exchange tube 208 to heat the water in the box 201, thereby achieving the effect of utilizing the residual heat of the flue gas.

[0030] The inlet pipe 204 is installed at the bottom of the housing 201, and the outlet pipe 205 is installed at the top of the housing 201. The inlet pipe 204 and the outlet pipe 205 are used to introduce gas, which is then used to exchange heat with the flue gas in the heat exchange tube 208, thereby further enhancing the heat utilization effect.

[0031] Please see Figure 2 , Figure 3 and Figure 4 In this embodiment, one end of the air inlet pipe 204 passes through the side wall of the housing 201 and enters the inner cavity of the cavity 210. One end of the air outlet pipe 205 is connected to the cavity 210 of the housing 201. Both the end faces of the air inlet pipe 204 and the air outlet pipe 205 are equipped with farads.

[0032] The air inlet pipe 204 and the air outlet pipe 205 are connected to the air pump through pipes to ensure that the gas can flow from the air inlet pipe 204 into the cavity 210 of the housing 201, then circulate from the cavity 210 of the housing 201, and finally flow out from the air outlet pipe 205.

[0033] Please see Figure 2 , Figure 3 and Figure 4 The recycling device 2 in this embodiment also includes a water inlet pipe 206 and a drain pipe 207. The water inlet pipe 206 is fixedly installed on one side of the top of the box 201, and the drain pipe 207 is fixedly installed at the bottom of the side wall of the box 201, and the drain pipe 207 is connected to the inner cavity of the box 201.

[0034] The inlet pipe 206 is used to replenish water to the inside of the tank 201, while the drain pipe 207 is used to drain the water from the inside of the tank 201.

[0035] Please see Figure 2 , Figure 3 and Figure 4 In this embodiment, a sealing plug is provided in the inner cavity of the water inlet pipe 206, and a valve is installed on the surface of the drain pipe 207. The sealing plug is used to seal the water inlet pipe 206, while the valve can control the opening and closing of the drain pipe 207.

[0036] Please see Figure 2 , Figure 3 and Figure 4 The recycling device 2 in this embodiment also includes a partition 209, which is fixedly installed on the inner wall of the cavity 210 of the housing 201. The partition 209 and the heat exchange tube 208 are arranged at intervals.

[0037] A baffle 209 is installed on the inner wall of the cavity 210 to separate the space of the cavity 210. This allows the gas to flow only in the gap between the baffle 209 and the heat exchange tube 208 after it enters the cavity 210. This allows the gas to circulate multiple times inside the cavity 210, providing sufficient time for contact with the heat exchange tube 208 and achieving a better heat exchange effect.

[0038] Please see Figure 2 , Figure 3 and Figure 4 In this embodiment, the partition 209 is designed as a spiral, and the side wall of the partition 209 is fixedly connected to the inner wall of the cavity 210 away from the heat exchange tube 208. A gap is left between the partition 209 and the heat exchange tube 208. By leaving a gap between the partition 209 and the heat exchange tube 208, the gas in the inlet pipe 204 can flow in the gap, ensuring that the gas can flow out from the outlet pipe 205.

[0039] Please see Figure 2 , Figure 3 and Figure 4 In this embodiment, the end of the second flue gas pipe 203 away from the heat exchange pipe 208 passes through the side wall of the cavity 210, and a flange is provided after the second flue gas pipe 203 passes through the side wall of the cavity 210.

[0040] A flange is installed on the second flue gas pipe 203 to facilitate the connection of the ventilation pipe with bolts through the flange, so as to introduce the flue gas into the subsequent flue gas purification equipment.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A flue gas desulfurization waste heat recycling device, comprising a desulfurization tower (1), wherein one end of the desulfurization tower (1) is connected to a recovery device (2) via a pipeline, characterized in that... ； The recovery device (2) includes a box (201), a cavity (210), a heat exchange tube (208), a first flue gas pipe (202), a second flue gas pipe (203), an inlet pipe (204), and an outlet pipe (205). The cavity (210) is opened in the side wall of the box (201). The two ends of the heat exchange tube (208) are respectively connected to the first flue gas pipe (202) and the second flue gas pipe (203). The first flue gas pipe (202) is connected to the flue gas discharge pipe of the desulfurization tower (1). The heat exchange tube (208) is designed as a spiral. The heat exchange tube (208) is installed in the inner cavity of the cavity (210). The side wall of the heat exchange tube (208) is attached to the inner wall of the cavity (210). The end of the heat exchange tube (208) away from the desulfurization tower (1) passes through the side wall of the box (201). The air inlet pipe (204) is installed at the bottom of the housing (201), and the air outlet pipe (205) is installed at the top of the housing (201).

2. The flue gas desulfurization waste heat recycling device according to claim 1, characterized in that, One end of the air inlet pipe (204) passes through the side wall of the housing (201) and enters the inner cavity of the cavity (210). One end of the air outlet pipe (205) is connected to the cavity (210) of the housing (201). Both the end faces of the air inlet pipe (204) and the air outlet pipe (205) are equipped with farad plates.

3. The flue gas desulfurization waste heat recycling device according to claim 1, characterized in that, The recycling device (2) also includes an inlet pipe (206) and a drain pipe (207). The inlet pipe (206) is fixedly installed on one side of the top of the box (201), and the drain pipe (207) is fixedly installed on the bottom of the side wall of the box (201), and the drain pipe (207) is connected to the inner cavity of the box (201).

4. The waste heat recycling device for flue gas desulfurization according to claim 3, characterized in that, A sealing plug is provided in the inner cavity of the water inlet pipe (206), and a valve is installed on the surface of the drain pipe (207).

5. The waste heat recycling device for flue gas desulfurization according to claim 1, characterized in that, The recycling device (2) also includes a partition (209), which is fixedly installed on the inner wall of the cavity (210) of the box (201), and the partition (209) and the heat exchange tube (208) are arranged at intervals.

6. The flue gas desulfurization waste heat recycling device according to claim 5, characterized in that, The partition (209) is designed as a spiral, and the side wall of the partition (209) is fixedly connected to the inner wall of the cavity (210) away from the heat exchange tube (208). A gap is left between the partition (209) and the heat exchange tube (208).

7. The flue gas desulfurization waste heat recycling device according to claim 1, characterized in that, The end of the second flue gas pipe (203) away from the heat exchange pipe (208) passes through the side wall of the cavity (210), and a flange is provided after the second flue gas pipe (203) passes through the side wall of the cavity (210).

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