Flue gas waste heat recovery and dust removal equipment

Abstract

The utility model discloses a flue gas waste heat recovery dust removal equipment relates to flue gas waste heat recovery technical field, including heat exchange equipment, the heat exchange equipment includes the heat exchange jar, the left side department fixed mounting of heat exchange jar has the filter jar, the bottom of heat exchange jar department fixed mounting has the support, the left side department fixed mounting of filter jar has the flue gas import, the inside of filter jar top is provided with the plug -in groove, the inside connection of plug -in groove has the filter frame of adaptation with it. The utility model discloses a filter jar cooperation filter frame carries out the primary filtration to the flue gas, intercepts the big particle dust, reduces the dusting risk of annular heat exchange tube in the subsequent heat exchange link, guarantees the heat exchange efficiency, and annular heat exchange tube is fully contacted with high temperature flue gas, and the waste heat is transferred to the cold water, realizes the energy recycling, sets up the dust fall box cooperation spray board and forms the water mist, and the flue gas after the waste heat recovery is further handled, and the cleanliness of flue gas emission is promoted.

Description

Technical Field

[0001] This utility model relates to the field of flue gas waste heat recovery technology, specifically to a flue gas waste heat recovery and dust removal device. Background Technology

[0002] Industrial production processes, such as steel smelting, electric furnace production, and kiln combustion, generate large amounts of high-temperature flue gas. This flue gas not only contains significant amounts of pollutants such as dust, which, if directly emitted, would severely pollute the atmosphere and harm human health, but also contains abundant waste heat resources. Failure to utilize this waste heat would result in a tremendous waste of energy. Flue gas waste heat recovery equipment is typically used to recover and utilize the heat from the flue gas. However, under normal circumstances, flue gas not only carries a large amount of heat but also a significant amount of soot, thus requiring treatment of the soot during waste heat recovery.

[0003] In the prior art, a Chinese patent document with publication number CN115900391A and publication date of April 4, 2023, was proposed to solve the above-mentioned technical problems. The technical solution disclosed in this patent document is as follows: a waste heat recovery device for high-temperature flue gas, including a flue gas inlet pipe and a flue gas outlet pipe, a main housing fixedly installed between the flue gas inlet pipe and the flue gas outlet pipe, a secondary housing fixedly installed on the top of the main housing, a dust collection box detachably installed on the bottom of the main housing, a heat exchange component movably installed inside the main housing, a fixing plate fixedly installed on the side of the main housing, a first electric cylinder fixedly installed on the top of the fixing plate, and the output end of the first electric cylinder fixedly connected to the side of the heat exchange component.

[0004] To address the issue of waste heat recovery from flue gas, existing technologies involve designing multiple heat exchange units in combination. These units can be arranged in overlapping or staggered configurations, allowing the gas ducts to become spiral-shaped during use for easy heat absorption and vertical for cleaning purposes. However, during heat exchange, impurities in the flue gas can adhere to the heat exchange tubes. If the ash buildup on the heat exchange tubes is hard, such as scale formed by high-temperature sintering, it can be difficult to remove completely, affecting the heat exchange efficiency of the tubes. Summary of the Invention

[0005] The purpose of this invention is to provide a flue gas waste heat recovery and dust removal device to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A flue gas waste heat recovery and dust removal device includes a heat exchange device, the heat exchange device includes a heat exchange tank, a filter tank is fixedly installed on the left side of the heat exchange tank, and a bracket is fixedly installed at the bottom of the heat exchange tank.

[0007] A flue gas inlet is fixedly installed on the left side of the filter canister. A plug-in groove is opened inside the top of the filter canister. A filter frame that is adapted to the plug-in groove is connected inside the plug-in groove. The filter frame can be detached and installed through the plug-in groove, which is convenient for regular replacement or cleaning and avoids the decline in filtration capacity.

[0008] A further improvement of this utility model is that: a port is provided on the right output end of the filter tank, the other end of the port extends to the input port of the heat exchange tank, and a water inlet is fixedly installed on the top left side of the heat exchange tank.

[0009] A further improvement of this utility model is that: an annular heat exchange tube is fixedly installed at the output end of the inlet of the heat exchange tank, and an outlet is fixedly installed at the other end of the annular heat exchange tube. The other end of the outlet extends to the bottom right side of the heat exchange tank. The layout design of the annular heat exchange tube increases the contact area with the flue gas and improves the waste heat recovery efficiency.

[0010] A further improvement of this utility model is that a dust collection box is fixedly installed on the output end of the heat exchange tank, an air outlet is fixedly installed on the right side shell of the dust collection box, and a matching sealing cover is connected to the front side of the dust collection box. The sealing cover on the front side of the dust collection box can be easily opened, which facilitates the maintenance of internal components and filter boxes and reduces the probability of equipment failure.

[0011] A further improvement of this utility model is that a water storage tank is fixedly installed on the bottom of the dust settling box, and a filter box is detachably installed at the connection between the water storage tank and the dust settling box.

[0012] A further improvement of this utility model is that a spray plate is fixedly installed on the top shell of the dust collection box, a circulation pump is fixedly installed on the rear side of the water storage tank, a liquid extraction pipe is fixedly installed on the liquid extraction end of the circulation pump, and the other end of the liquid extraction pipe extends into the rear interior of the water storage tank.

[0013] A further improvement of this utility model is that: a drain pipe is fixedly installed at the discharge end of the circulating pump, and the other end of the drain pipe is fixedly installed inside the top of the spray plate. The water storage tank and the circulating pump cooperate to form a water circulation system, which eliminates the need for continuous replenishment of new water and reduces operating costs.

[0014] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows: This utility model provides a flue gas waste heat recovery and dust removal device. By setting up a filter tank and a filter frame to perform preliminary filtration of flue gas, large dust particles are intercepted, reducing the risk of dust accumulation on the annular heat exchange tube in the subsequent heat exchange process and ensuring heat exchange efficiency. The annular heat exchange tube is in full contact with the high-temperature flue gas, transferring waste heat to cold water to achieve energy recovery and reuse.

[0015] This utility model provides a flue gas waste heat recovery dust removal device. By setting up a dust settling box and spraying plates to form water mist, the flue gas after waste heat recovery is further treated. Fine dust falls with the water flow, and after being filtered by the filter box, the water flows back to the water storage tank for recycling. This not only improves the dust removal effect but also reduces water waste, ultimately resulting in the emission of clean flue gas and reducing pollution to the atmospheric environment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the heat exchange tank structure of this utility model; Figure 3 This is a schematic cross-sectional view of the heat exchange tank structure of this utility model; Figure 4 This is a schematic cross-sectional view of the dust collection box structure of this utility model; Figure 5 This is a schematic diagram of the rear side of the dust collection box structure of this utility model.

[0017] In the diagram: 1. Heat exchange equipment; 2. Heat exchange tank; 21. Water inlet; 22. Annular heat exchange tube; 23. Water outlet; 24. Dust settling box; 25. Air outlet; 26. Sealing cover; 27. Water storage tank; 28. Filter box; 29. ​​Spray plate; 210. Circulating pump; 211. Liquid extraction pipe; 212. Liquid discharge pipe; 3. Filter tank; 31. Flue gas inlet; 32. Insertion groove; 33. Filter frame; 34. Through port; 4. Support. Detailed Implementation

[0018] 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. Example

[0019] like Figure 1-5As shown, this utility model provides a flue gas waste heat recovery and dust removal device, including a heat exchange device 1. The heat exchange device 1 includes a heat exchange tank 2. A filter tank 3 is fixedly installed on the left side of the heat exchange tank 2. A bracket 4 is fixedly installed at the bottom of the heat exchange tank 2. A flue gas inlet 31 is fixedly installed on the left side of the filter tank 3. A plug-in groove 32 is opened inside the top of the filter tank 3. A filter frame 33 adapted to the plug-in groove 32 is connected inside the plug-in groove 32. A through-hole 34 is opened on the right output end of the filter tank 3. The other end of the through-hole 34 extends to the input port of the heat exchange tank 2. A water inlet 21 is fixedly installed on the top left side of the heat exchange tank 2. An annular heat exchange tube 22 is fixedly installed inside the heat exchange tank 2 at the output end of the water inlet 21. A water outlet 23 is fixedly installed on the other end of the annular heat exchange tube 22. The other end of the water outlet 23 extends to the bottom right side of the heat exchange tank 2.

[0020] Furthermore, the high-temperature flue gas first enters the filter tank 3 through the flue gas inlet 31. In the filter tank 3, the flue gas is filtered by the filter frame 33. The filter frame 33 is installed inside the filter tank 3 through the insertion slot 32, which can be easily disassembled and replaced. It can effectively intercept larger dust and impurities in the flue gas, preliminarily purify the flue gas, and reduce pollution to subsequent equipment. The flue gas that has undergone preliminary filtration enters the heat exchange tank 2 through the outlet 34 on the right side of the filter tank 3. At the same time, cold water flows into the annular heat exchange tube 22 from the water inlet 21 on the top left side of the heat exchange tank 2. The annular heat exchange tube 22 is distributed inside the heat exchange tank 2 and is in full contact with the high-temperature flue gas entering the heat exchange tank 2. Through heat exchange, the heat of the flue gas is transferred to the cold water in the annular heat exchange tube 22, which raises the temperature of the cold water and realizes waste heat recovery. Example

[0021] like Figure 1-5 As shown, based on Embodiment 1, this utility model provides a technical solution: Preferably, a dust settling box 24 is fixedly installed on the output end of the heat exchange tank 2, an air outlet 25 is fixedly installed on the right side shell of the dust settling box 24, a matching sealing cover plate 26 is connected to the front side of the dust settling box 24, a water storage tank 27 is fixedly installed on the bottom end of the dust settling box 24, a filter box 28 is detachably installed at the connection between the water storage tank 27 and the dust settling box 24, a spray plate 29 is fixedly installed on the top shell of the dust settling box 24, a circulation pump 210 is fixedly installed on the rear side of the water storage tank 27, a suction pipe 211 is fixedly installed on the suction end of the circulation pump 210, the other end of the suction pipe 211 extends into the rear side of the water storage tank 27, a discharge pipe 212 is fixedly installed on the discharge end of the circulation pump 210, and the other end of the discharge pipe 212 is fixedly installed inside the top of the spray plate 29.

[0022] Furthermore, the flue gas that has completed waste heat recovery enters the dust settling box 24 from the output end of the heat exchange tank 2. The spray plate 29 on the top shell of the dust settling box 24 sprays the flue gas to reduce dust. The water required for spraying comes from the water storage tank 27 at the bottom of the dust settling box 24. The circulation pump 210 on the back side of the water storage tank 27 draws water out of the water storage tank 27 through the liquid extraction pipe 211, and then delivers it to the spray plate 29 through the liquid discharge pipe 212. The water is sprayed out from the spray plate 29 to form a water mist, which fully contacts the fine dust and impurities in the flue gas, causing the dust and impurities to fall with the water flow. The falling wastewater will pass through the filter box 28 at the connection between the water storage tank 27 and the dust settling box 24. The filter box 28 can filter the wastewater to remove the dust and impurities. The filtered water flows back to the water storage tank 27 to realize the recycling of water resources and reduce water waste. The clean flue gas after the spray dust settling treatment is discharged from the air outlet 25 on the right side shell of the dust settling box 24.

[0023] The working principle of this flue gas waste heat recovery and dust removal equipment will be explained in detail below.

[0024] like Figure 1-5As shown, during operation, high-temperature flue gas first enters the filter canister 3 through the flue gas inlet 31 on the left side. Inside the filter canister 3, the flue gas is filtered by the filter frame 33. The filter frame 33 is installed inside the filter canister 3 via the insertion slot 32, allowing for easy disassembly and replacement. It effectively intercepts larger dust and impurities in the flue gas, initially purifying the flue gas and reducing pollution to subsequent equipment. The flue gas that has undergone preliminary filtration enters the heat exchange tank 2 through the outlet 34 on the right side of the filter canister 3. Simultaneously, cold water flows from... Water flows into the annular heat exchange tube 22 through the inlet 21 on the top left side of the heat exchange tank 2. The annular heat exchange tube 22 is distributed inside the heat exchange tank 2 and comes into full contact with the high-temperature flue gas entering the heat exchange tank 2. Through heat exchange, the heat of the flue gas is transferred to the cold water inside the annular heat exchange tube 22, raising the temperature of the cold water and realizing waste heat recovery. The hot water, after absorbing heat, is discharged from the outlet 23 at the other end of the annular heat exchange tube 22 and can be used for heating, production water, and other fields, realizing energy reuse. The flue gas that has completed waste heat recovery is discharged from the outlet of the heat exchange tank 2. The flue gas enters the dust collection box 24. The spray plate 29 on the top shell of the dust collection box 24 sprays the flue gas to suppress dust. The water required for spraying comes from the water storage tank 27 at the bottom of the dust collection box 24. The circulation pump 210 on the back of the water storage tank 27 draws water from the water storage tank 27 through the extraction pipe 211, and then delivers it to the spray plate 29 through the drain pipe 212. The water is sprayed from the spray plate 29 to form a water mist, which fully contacts the fine dust and impurities in the flue gas, causing the dust and impurities to fall with the water flow. The falling wastewater will pass through the water storage tank 27 and the dust collection box 24. The filter box 28 connected to the dust box 24 can filter sewage to remove dust and impurities. The filtered water flows back to the water storage tank 27 to realize the recycling of water resources and reduce water waste. The clean flue gas after the dust suppression spray treatment is discharged from the air outlet 25 on the right side of the dust box 24. In addition, the sealing cover 26 connected to the front of the dust box 24 can be easily opened to facilitate the cleaning and maintenance of the inside of the dust box 24 and the filter box 28, ensuring the long-term stable operation of the equipment.

[0025] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A flue gas waste heat recovery and dust removal device, comprising a heat exchange device (1), characterized in that: The heat exchange device (1) includes a heat exchange tank (2), a filter tank (3) is fixedly installed on the left side of the heat exchange tank (2), and a bracket (4) is fixedly installed at the bottom of the heat exchange tank (2). A flue gas inlet (31) is fixedly installed on the left side of the filter canister (3), and a plug-in groove (32) is opened inside the top of the filter canister (3), and a filter frame (33) that is adapted to it is connected inside the plug-in groove (32).

2. The flue gas waste heat recovery and dust removal equipment according to claim 1, characterized in that: The filter tank (3) has a port (34) on the right output end, and the other end of the port (34) extends to the input port of the heat exchange tank (2). The heat exchange tank (2) has a water inlet (21) fixedly installed on the top left side.

3. The flue gas waste heat recovery and dust removal equipment according to claim 2, characterized in that: The heat exchange tank (2) has an annular heat exchange tube (22) fixedly installed at the output end of the inlet (21). The other end of the annular heat exchange tube (22) has an outlet (23) fixedly installed. The other end of the outlet (23) extends to the bottom right side of the heat exchange tank (2).

4. The flue gas waste heat recovery and dust removal equipment according to claim 1, characterized in that: A dust collection box (24) is fixedly installed on the output end of the heat exchange tank (2). An air outlet (25) is fixedly installed on the right side shell of the dust collection box (24). A matching sealing cover plate (26) is connected to the front side of the dust collection box (24).

5. The flue gas waste heat recovery and dust removal equipment according to claim 4, characterized in that: A water storage tank (27) is fixedly installed on the bottom of the dust settling box (24), and a filter box (28) is detachably installed at the connection between the water storage tank (27) and the dust settling box (24).

6. The flue gas waste heat recovery and dust removal equipment according to claim 5, characterized in that: A spray plate (29) is fixedly installed on the top shell of the dust collection box (24), and a circulation pump (210) is fixedly installed on the rear side of the water storage tank (27). A liquid extraction pipe (211) is fixedly installed on the liquid extraction end of the circulation pump (210), and the other end of the liquid extraction pipe (211) extends into the rear side of the water storage tank (27).

7. The flue gas waste heat recovery and dust removal equipment according to claim 6, characterized in that: The discharge end of the circulating pump (210) is fixedly installed with a discharge pipe (212), and the other end of the discharge pipe (212) is fixedly installed inside the top of the spray plate (29).

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