Waste heat recovery structure

Abstract

The waste heat recovery structure comprises a treatment box, a filtering bin, a purifying bin, a recovery box, a heat exchange pipe, a discharge pipe and a heat preservation layer, the interior of the treatment box is divided into the filtering bin and the purifying bin through an installed partition plate, an air inlet is formed in the filtering bin, a connecting pipe is installed on the filtering bin, the heat exchange pipe is installed in the recovery box, and the discharge pipe is installed in the heat exchange pipe. One end of each heat exchange pipe is connected with one end of the connecting pipe, the heat exchange pipes are in a spiral pipe shape, the number of the heat exchange pipes is six, the number of the heat exchange pipes is not limited to six, and a heat preservation layer is arranged in the inner wall of the recycling box. And a heat preservation layer is arranged in the inner wall of the recycling box, the problem of waste caused by heat loss of heated water is avoided, smoke enters the purification bin through the exhaust pipe after heat exchange, and the problem of air pollution caused by direct emission of harmful substances in the smoke is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery structures, in particular to a waste heat recovery structure. Background Technique

[0002] Recycling industrial waste heat is an important measure for energy conservation, resource protection, environmental protection and circular economy. By comprehensively utilizing the existing waste heat resources and adopting advanced waste heat recovery technologies, this part of waste heat can be fully and reasonably utilized, which can greatly reduce the comprehensive energy consumption of enterprises, thus improving the competitiveness of enterprises and promoting the sustainable development of enterprises.

[0003] After retrieval, the Chinese utility model patent CN214486255U discloses a boiler flue gas waste heat recovery and utilization energy-saving system. It includes a box body, an air outlet pipe is installed at the top position of the box body, an air inlet pipe is installed at the bottom position of the box body, a dust baffle is installed at one end of the air inlet pipe inside the box cavity, a filter screen plate is installed at the upper position of the dust baffle inside the box cavity, a heat preservation layer is installed at the upper position of the filter screen plate, a heat exchange pipe is installed inside the heat preservation layer, the heat exchange pipe penetrates through the heat preservation layer and communicates with the upper and lower positions of the box cavity, a water inlet pipe is installed at the bottom left position of the heat preservation layer, and an overflow pipe is installed at the upper right position of the heat preservation layer. Both the water inlet pipe and the overflow pipe penetrate through the box body and extend to the outside of the box body, which can filter the dust particles in the flue gas to avoid blocking the heat exchange pipe. At the same time, compared with the traditional flue gas waste heat recovery and utilization equipment, the waste heat recovery utilization rate is higher.

[0004] The technical solution in this application document still has deficiencies: the flue gas generated by the gas combustion furnace cannot be fully heat-exchanged with water, resulting in low waste heat recovery efficiency of the flue gas, waste caused by heat dissipation after waste heat recovery, and direct emission of harmful substances in the flue gas after heat recovery, causing air pollution. Content of the Utility Model

[0005] The purpose of the utility model is to provide a waste heat recovery structure to solve the problems in the prior art.

[0006] To achieve the above purpose, the utility model provides the following technical solution: a waste heat recovery structure, including a treatment box, a filtration chamber, a purification chamber, a recovery box, a heat exchange pipe, a discharge pipe and a heat preservation layer. The treatment box is divided into a filtration chamber and a purification chamber by a partition installed therein. An air inlet is provided on the filtration chamber, a connecting pipe is installed on the filtration chamber, a heat exchange pipe is installed in the recovery box, one end of the heat exchange pipe is connected to one end of the connecting pipe, the heat exchange pipe is in a spiral tubular shape, there are six groups of the heat exchange pipes and the number is not limited to six groups, and a heat preservation layer is provided in the inner wall of the recovery box.

[0007] By adopting the above technical solution, the flue gas of the combustion furnace enters the filter chamber in the treatment box through the air inlet, first passes through the filter screen to filter dust particles, and then enters the heat exchange tubes in the recovery box. Cold water is poured into the recovery box through the water injection pipe. The hot flue gas in the heat exchange tubes exchanges heat with the cold water. By designing the heat exchange tubes into spiral tubes and increasing the number of pipe groups, the residence time and contact area of the flue gas in the heat exchange pipes are increased, enabling the flue gas to better exchange heat with water, improving the recovery efficiency of the waste heat of the flue gas. By providing a heat insulation layer on the inner wall of the recovery box, the problem of waste caused by heat dissipation of the heated water is avoided. After the flue gas exchanges heat, it enters the purification chamber through the discharge pipe, and harmful gases are purified by the adsorption net and then discharged from the exhaust port, avoiding the problem of air pollution caused by the direct discharge of harmful substances in the flue gas.

[0008] Preferably, a filter screen is installed in the filter chamber, and the filter chamber is communicated with the air inlet and the connecting pipe installed on the treatment box.

[0009] By adopting the above technical solution, the dust particles in the flue gas can be filtered, avoiding the problem that the heat exchange tubes are blocked due to blockage, which affects the waste heat recovery.

[0010] Preferably, an adsorption net is installed in the purification chamber, and the purification chamber is communicated with the exhaust port and the discharge pipe installed on the treatment box.

[0011] By adopting the above technical solution, harmful gases are purified by the adsorption net and then discharged from the exhaust port, avoiding the problem of air pollution caused by the direct discharge of harmful substances in the flue gas.

[0012] Preferably, the air inlet is externally connected to the gas pipe of the combustion furnace flue.

[0013] Preferably, the other end of the heat exchange tube is communicated with the discharge pipe.

[0014] Preferably, a water injection pipe and a drain pipe are installed on the recovery box.

[0015] Preferably, valves and water pumps are installed on the water injection pipe and the drain pipe.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows: the residence time and contact area of the flue gas in the heat exchange pipes are increased, the recovery efficiency of the waste heat of the flue gas is improved, by providing a heat insulation layer on the inner wall of the recovery box, the problem of waste caused by heat dissipation of the heated water is avoided, and after the flue gas exchanges heat, it enters the purification chamber through the discharge pipe, avoiding the problem of air pollution caused by the direct discharge of harmful substances in the flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present utility model and form a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model. In the drawings:

[0018] Figure 1 It is a schematic three-dimensional structure diagram of the present utility model.

[0019] Figure 2 It is a schematic front structure diagram of the present utility model.

[0020] Figure 3 It is a schematic sectional structure diagram of the present utility model.

[0021] Figure 4 It is an enlarged schematic diagram of the heat exchange tube of the present utility model.

[0022] In the figure: 1. Processing box; 2. Partition board; 3. Filter chamber; 4. Purification chamber; 5. Air inlet; 6. Exhaust port; 7. Filter screen; 8. Adsorption net; 9. Connecting pipe; 10. Recovery box; 11. Heat exchange tube; 12. Discharge pipe; 13. Water injection pipe; 14. Drain pipe; 15. Thermal insulation layer. Specific embodiments

[0023] To make the purpose, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model. Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model to be protected, but merely represents the selected embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

[0024] Refer to Figure 1 , Figure 2 , Figure 3 , Figure 4, including a treatment tank 1, a filtration chamber 3, a purification chamber 4, a recovery tank 10, heat exchange tubes 11, a discharge pipe 12 and a heat preservation layer 15. In the treatment tank 1, a filtration chamber 3 and a purification chamber 4 are separated by an installed partition 2. An air inlet 5 is provided on the filtration chamber 3, and a connecting pipe 9 is installed on the filtration chamber 3. A heat exchange tube 11 is installed in the recovery tank 10. One end of the heat exchange tube 11 is connected to one end of the connecting pipe 9. The heat exchange tube 11 is in a spiral tube shape. There are six groups of the heat exchange tubes 11, and the number is not limited to six groups. A heat preservation layer 15 is provided in the inner wall of the recovery tank 10. The flue gas of the combustion furnace enters the filtration chamber 3 in the treatment tank 1 through the air inlet 5. After passing through the filter screen 7 to filter dust particles, it enters the heat exchange tube 11 in the recovery tank 10. Cold water is poured into the recovery tank 10 through a water injection pipe 13. The hot flue gas in the heat exchange tube 11 exchanges heat with the cold water. By designing the heat exchange tube 11 into a spiral tube shape and increasing the number of pipe groups, the residence time and contact area of the flue gas in the heat exchange pipeline are increased, enabling the flue gas to better exchange heat with water and improving the recovery efficiency of the flue gas waste heat. By providing the heat preservation layer 15 in the inner wall of the recovery tank 10, the problem of waste caused by heat dissipation of the heated water is avoided. After the flue gas exchanges heat, it enters the purification chamber 4 through the discharge pipe 12. After the harmful gas is purified by the adsorption net 8, it is discharged from the exhaust port 6, avoiding the problem of air pollution caused by the direct discharge of harmful substances in the flue gas.

[0025] Refer to Figure 1 , Figure 3 , a filter screen 7 is installed in the filtration chamber 3. The filtration chamber 3 is communicated with the air inlet 5 and the connecting pipe 9 installed on the treatment tank 1, which can filter the dust particles in the flue gas and avoid the problem that the heat exchange tube 11 is blocked, affecting the waste heat recovery. An adsorption net 8 is installed in the purification chamber 4. The purification chamber 4 is communicated with the exhaust port 6 and the discharge pipe 12 installed on the treatment tank 1. After the harmful gas is purified by the adsorption net 8, it is discharged from the exhaust port 6, avoiding the problem of air pollution caused by the direct discharge of harmful substances in the flue gas.

[0026] Refer to Figure 1 , Figure 2 , Figure 4 , the air inlet 5 is externally connected to the gas pipe of the combustion furnace flue. The other end of the heat exchange tube 11 is communicated with the discharge pipe 12. A water injection pipe 13 and a drain pipe 14 are installed on the recovery tank 10. Valves and water pumps are installed on the water injection pipe 13 and the drain pipe 14.

[0027] The working principle of the present utility model is as follows: The flue gas of the combustion furnace enters the filtration chamber 3 in the treatment box 1 through the air inlet 5, first passes through the filter screen 7 to filter dust particles, and then enters the heat exchange tube 11 in the recovery box 10. Cold water is poured into the recovery box 10 through the water injection pipe 13. The hot flue gas in the heat exchange tube 11 exchanges heat with the cold water. By designing the heat exchange tube 11 into a spiral tube shape and increasing the number of pipe groups, the residence time and contact area of the flue gas in the heat exchange pipeline are increased, enabling the flue gas to better exchange heat with water, improving the recovery efficiency of the waste heat of the flue gas. By providing a heat insulation layer 15 in the inner wall of the recovery box 10, the problem of waste caused by heat dissipation of the heated water is avoided. After the flue gas exchanges heat, it enters the purification chamber 4 through the discharge pipe 12, and is discharged from the exhaust port 6 after harmful gases are purified by the adsorption net 8, avoiding the problem of air pollution caused by direct discharge of harmful substances in the flue gas.

[0028] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A waste heat recovery structure, comprising a processing box (1), a filtering chamber (3), a purification chamber (4), a recovery box (10), a heat exchange tube (11), a discharge pipe (12) and a heat insulation layer (15), characterized in that: The processing box (1) is separated into a filter chamber (3) and a purification chamber (4) by an installed partition (2); the filter chamber (3) is provided with an air inlet (5); the filter chamber (3) is provided with a connecting pipe (9); a heat exchange tube (11) is installed in the recovery box (10); one end of the heat exchange tube (11) is connected to one end of the connecting pipe (9); the heat exchange tube (11) is in the shape of a spiral tube; six groups of the heat exchange tube (11) are provided and are not limited to six groups; and a heat insulation layer (15) is provided in the inner wall of the recovery box (10).

2. A waste heat recovery structure according to claim 1, characterized in that: A filter screen (7) is installed in the filter bin (3), and the filter bin (3) is connected to an air inlet (5) and a connecting pipe (9) installed on the processing box (1).

3. The waste heat recovery structure according to claim 1, characterized in that: An adsorption net (8) is installed in the purification chamber (4), and the purification chamber (4) is connected to an exhaust port (6) and an exhaust pipe (12) installed on the processing box (1).

4. The waste heat recovery structure according to claim 1, characterized in that: The air inlet (5) is externally connected to an air pipe for burning furnace smoke.

5. The waste heat recovery structure according to claim 1, characterized in that: The other end of the heat exchange tube (11) is connected to the discharge pipe (12).

6. The waste heat recovery structure according to claim 1, characterized in that: The recovery box (10) is provided with a water injection pipe (13) and a drainage pipe (14).

7. A waste heat recovery structure according to claim 6, characterized in that: Valves and water pumps are installed on the water injection pipe (13) and the drainage pipe (14).

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