A power plant boiler flue gas waste heat recovery device

Abstract

The utility model relates to the technical field of flue gas waste heat recovery device, specifically disclose a power plant boiler flue gas waste heat recovery device, including recovery tank and air inlet hole, air inlet hole is set up in recovery tank inner wall one side, the bottom of recovery tank inboard sliding installation has the liquid collecting tank, the filter plate is movably installed above the liquid collecting tank, the adsorption plate is movably installed above the filter plate, the recovery tank surface one side fixed mounting has the air inlet pipe, the recovery tank top fixed mounting has the exhaust pipe, the recovery tank back fixed mounting has the heat pipe, the heat pipe surface one side fixedly connected with the butt joint plate, this power plant boiler flue gas waste heat recovery device, after the device processing flue gas, the pollutant content reduces greatly, meets the strict environmental protection emission standard. The design combines waste heat recovery and flue gas purification function organically, realizes the deep purification of flue gas while recycling waste heat, reduces atmospheric pollutant emission, has remarkable environmental protection benefit.

Description

Technical Field

[0001] This utility model relates to the technical field of flue gas waste heat recovery devices, specifically a flue gas waste heat recovery device for power plant boilers. Background Technology

[0002] A boiler is an energy conversion device. The energy input to a boiler includes the chemical energy of fuel and electrical energy. The boiler outputs steam, high-temperature water, or organic heat carriers with a certain amount of thermal energy.

[0003] Traditional devices often focus on waste heat recovery, but their ability to treat pollutants such as dust, sulfides, and nitrogen oxides in flue gas is insufficient. Direct emission of untreated flue gas not only causes air pollution but may also affect the heat exchange efficiency and service life of the equipment due to pollutants adhering to the surface of the heat exchange equipment, increasing equipment maintenance costs. Therefore, we propose a waste heat recovery device for power plant boiler flue gas. Utility Model Content

[0004] The purpose of this invention is to provide a waste heat recovery device for power plant boiler flue gas, addressing the insufficient capacity of the prior art to treat pollutants such as dust, sulfides, and nitrogen oxides contained in flue gas. Direct emission of unpurified flue gas not only causes air pollution but may also affect the heat exchange efficiency and lifespan of heat exchange equipment due to pollutants adhering to the surface, increasing equipment maintenance costs.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a waste heat recovery device for power plant boiler flue gas, comprising a recovery box and an air inlet. The air inlet is opened on one side of the inner wall of the recovery box. A liquid collection box is slidably installed at the bottom of the inner side of the recovery box. A filter plate is movably installed above the liquid collection box. An adsorption plate is movably installed above the filter plate. An air inlet pipe is fixedly installed on one side of the surface of the recovery box. An exhaust pipe is fixedly installed on the top of the recovery box. A heat conduction pipe is fixedly installed on the back of the recovery box. A docking plate is fixedly connected to one side of the surface of the heat conduction pipe.

[0006] The recycling bin has a lower pull-out plate that slides and engages with the bottom surface, and a lower handle is fixedly installed on the surface of the lower pull-out plate. A middle pull-out plate slides and engages with the top of the lower pull-out plate, and a handle is fixedly installed at the center of the surface of the middle pull-out plate. An upper pull-out plate slides and engages with the top of the middle pull-out plate, and an upper handle is fixedly installed on the surface of the upper pull-out plate.

[0007] One side of the air intake port surface is parallel to and connected to the air intake pipe.

[0008] The bottom of the exhaust pipe is connected to the inside of the recycling bin.

[0009] The filter plates consist of three sets, which are evenly distributed inside the recycling bin in an up-and-down inclined manner.

[0010] The adsorption plate consists of two sets, with the upper surface of each set connected to the bottom of the exhaust pipe.

[0011] The lower, middle, and upper pull-out plates are parallel to and correspond to the liquid collection tank, filter plate, and adsorption plate, and are slidably installed inside the recovery tank via the lower handle, grip, and upper handle.

[0012] This utility model has at least the following beneficial effects:

[0013] 1. Three sets of evenly distributed filter plates, inclined vertically, intercept and filter particulate matter such as dust in the flue gas in stages. The different inclination angles help to extend the filtration path of the flue gas and improve the capture rate of particulate matter. Two sets of adsorption plates can adsorb and treat residual sulfides, nitrogen oxides and other harmful gases in the flue gas, further purifying it. The flue gas treated by this device has a significantly reduced pollutant content, meeting strict environmental emission standards. This design organically combines waste heat recovery with flue gas purification, achieving deep purification of flue gas while recovering waste heat, reducing air pollutant emissions and demonstrating significant environmental benefits.

[0014] 2. The device can be easily pulled out of the recycling bin using the lower handle, grip, and upper handle. When it is necessary to clean the dust accumulated on the filter plate or replace the saturated adsorption plate, maintenance personnel do not need to perform complicated disassembly of the equipment. They can simply pull the corresponding pull plate to quickly remove the parts for cleaning or replacement. The operation is simple and quick, greatly shortening the equipment maintenance time. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the connection structure of the recycling bin, air inlet pipe, and exhaust pipe of this utility model;

[0016] Figure 2 This is a schematic diagram of the connection structure between the heat pipe and the docking plate of this utility model;

[0017] Figure 3 This is a schematic diagram of the connection structure of the lower pull-out plate, lower handle, middle pull-out plate, grip, upper pull-out plate, and upper handle of this utility model.

[0018] Figure 4 This is a schematic diagram of the connection structure of the air inlet, filter plate, liquid collection box, adsorption plate and exhaust pipe of this utility model.

[0019] In the diagram: 100, recovery bin; 101, air inlet pipe; 102, exhaust pipe; 103, lower pull-out plate; 104, lower handle; 105, middle pull-out plate; 106, grip; 107, upper pull-out plate; 108, upper handle; 109, heat conduction pipe; 110, docking plate; 200, air inlet; 201, filter plate; 202, liquid collection tank; 203, adsorption plate. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1 to 4 This utility model provides a technical solution: a waste heat recovery device for power plant boiler flue gas, including a recovery box 100 and an air inlet 200. The air inlet 200 is opened on one side of the inner wall of the recovery box 100. A liquid collection box 202 is slidably installed on the bottom of the inner side of the recovery box 100. A filter plate 201 is movably installed above the liquid collection box 202. There are three sets of filter plates 201, which are evenly distributed inside the recovery box 100 in an up-down inclined manner. An adsorption plate 203 is movably installed above the filter plate 201. There are two sets of adsorption plates 203. The upper surfaces of the two sets of adsorption plates 203 are correspondingly connected to the bottom of the exhaust pipe 102. An air inlet pipe 101 is fixedly installed on one side of the surface of the recovery box 100. An exhaust pipe 102 is fixedly installed on the top of the recovery box 100. The bottom of the exhaust pipe 102 is correspondingly connected to the inside of the recovery box 100. A heat conduction pipe 109 is fixedly installed on the back of the recovery box 100. A docking plate 110 is fixedly connected to one side of the surface of the heat conduction pipe 109.

[0022] A lower pull-out plate 103 is slidably engaged with the bottom surface of the recycling bin 100. A lower handle 104 is fixedly installed on the surface of the lower pull-out plate 103. A middle pull-out plate 105 is slidably engaged with the upper surface of the lower pull-out plate 103. A handle 106 is fixedly installed at the center of the surface of the middle pull-out plate 105. An upper pull-out plate 107 is slidably engaged with the upper surface of the middle pull-out plate 105. An upper handle 108 is fixedly installed on the surface of the upper pull-out plate 107. The lower pull-out plate 103, the middle pull-out plate 105, and the upper pull-out plate 107 are all parallel and correspond to the liquid collection tank 202, the filter plate 201, and the adsorption plate 203, and are slidably installed inside the recycling bin 100 through the lower handle 104, the handle 106, and the upper handle 108.

[0023] One side of the surface of the air inlet 200 is parallel to and connected to the air inlet pipe 101.

[0024] Working Principle: When the high-temperature flue gas generated by the power plant boiler enters the recovery device through the inlet pipe 101, the flue gas can smoothly enter the recovery box 100 through the parallel and corresponding connection between the inlet hole 200 and the inlet pipe 101. During this process, the heat-conducting pipe 109 fixedly installed on the back of the recovery box 100 begins to play a role in waste heat recovery. The heat-conducting pipe 109 is connected to the docking plate 110. The heat emitted by the high-temperature flue gas is conducted through the box body of the recovery box 100 to the heat-conducting pipe 109, and then the heat-conducting pipe 109 transfers the heat to the docking plate 110. The docking plate 110 can be connected to an external heat exchange system, thereby recovering and utilizing the heat in the flue gas.

[0025] The flue gas entering the recycling bin 100 first passes through three sets of filter plates 201 evenly distributed at an angle. Because the filter plates 201 are angled, the flue gas flows along a tortuous path, which greatly extends the contact time and contact area between the flue gas and the filter plates 201. When dust and other particulate matter in the flue gas moves with the airflow, it collides with, is intercepted, and adsorbed by the filter plates 201, effectively capturing them. As the flue gas passes through the three sets of filter plates 201, dust and other particulate matter are intercepted and filtered layer by layer, achieving efficient removal of particulate matter from the flue gas and completing the initial purification.

[0026] The flue gas, after being filtered by filter plate 201, continues to flow upwards and enters the area of ​​two sets of adsorption plates 203. Adsorption plates 203 employ special adsorption materials capable of adsorbing harmful gases such as residual sulfides and nitrogen oxides in the flue gas. As the flue gas passes through adsorption plates 203, harmful gas molecules are adsorbed by the porous structure of the adsorption material, further purifying the flue gas. After treatment by adsorption plates 203, the pollutant content of the flue gas is significantly reduced, and it is finally discharged through the exhaust pipe 102, which is connected to the upper surface of the adsorption plates 203, meeting environmental emission standards.

[0027] During the flue gas cooling and purification process, water vapor in the high-temperature flue gas gradually condenses into liquid water. This condensate flows downwards along the filter plate 201 and adsorption plate 203, eventually converging into the collection tank 202 at the bottom inner side of the recovery tank 100. The collection tank 202 is used to collect the condensate centrally, preventing it from accumulating in the recovery tank 100 and affecting the normal operation of the equipment. When the condensate in the collection tank 202 reaches a certain amount, the collection tank 202 can be pulled out by sliding the lower pull plate 103 to discharge or further treat the condensate.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waste heat recovery device for flue gas from a power plant boiler, comprising a recovery box (100) and an air inlet (200), characterized in that: The air inlet (200) is opened on one side of the inner wall of the recovery box (100). A liquid collection box (202) is slidably installed on the bottom of the inner side of the recovery box (100). A filter plate (201) is movably installed above the liquid collection box (202). An adsorption plate (203) is movably installed above the filter plate (201). An air inlet pipe (101) is fixedly installed on one side of the surface of the recovery box (100). An exhaust pipe (102) is fixedly installed on the top of the recovery box (100). A heat conduction pipe (109) is fixedly installed on the back of the recovery box (100). A docking plate (110) is fixedly connected to one side of the surface of the heat conduction pipe (109).

2. The power plant boiler flue gas heat recovery device according to claim 1, characterized in that: The bottom of the recycling bin (100) is slidably connected to a lower pull-out plate (103), and a lower handle (104) is fixedly installed on the surface of the lower pull-out plate (103). A middle pull-out plate (105) is slidably connected above the lower pull-out plate (103), and a handle (106) is fixedly installed at the center of the surface of the middle pull-out plate (105). An upper pull-out plate (107) is slidably connected above the middle pull-out plate (105), and an upper handle (108) is fixedly installed on the surface of the upper pull-out plate (107).

3. The power plant boiler flue gas heat recovery device according to claim 1, characterized in that: The surface of the air inlet (200) is parallel to and connected to the air inlet pipe (101) on one side.

4. The power plant boiler flue gas heat recovery device according to claim 1, characterized by: The bottom of the exhaust pipe (102) is connected to the interior of the recycling box (100).

5. The power plant boiler flue gas heat recovery device according to claim 1, characterized in that: The filter plate (201) is provided in three sets, and the three sets of filter plates (201) are evenly distributed inside the recycling box (100) in an up-down inclined manner.

6. The power plant boiler flue gas heat recovery device according to claim 1, characterized by: The adsorption plate (203) is provided in two sets, and the upper surface of the two sets of adsorption plates (203) is connected to the bottom of the exhaust pipe (102).

7. The power plant boiler flue gas heat recovery device according to claim 2, characterized by: The lower pull-out plate (103), middle pull-out plate (105) and upper pull-out plate (107) are all parallel to and correspond to the liquid collection tank (202), filter plate (201) and adsorption plate (203), and are slidably installed inside the recovery tank (100) via the lower handle (104), grip (106) and upper handle (108).

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