Waste heat recycling structure for heating boiler

Abstract

The utility model discloses a waste heat recycling structure for a heating boiler, and relates to the technical field of boiler waste heat recycling. The device comprises a conversion box, a liquid inlet pipe and a liquid outlet pipe are arranged at the positions, close to the upper end and the lower end, of the outer surface of the conversion box respectively, a first guide pipe and a second guide pipe are fixedly connected to the positions, close to the middle, of the outer surfaces of the upper end and the lower end of the conversion box respectively, and one ends of the first guide pipe and the second guide pipe are closed; according to the utility model, through the mutual cooperation of the ash cleaning mechanism and the supporting mechanism, in the process that smoke flows towards the guide pipe I through the smoke guide pipe, along with the change of the air pressure in the guide pipe I, the rope reciprocates along the smoke guide pipe in the heat exchange process of the smoke and water to clean the inner wall of the smoke guide pipe; and the removed particles and dust enter the collecting frame through the discharging hole, so that the interior of the gas guide pipe is prevented from being blocked, normal circulation of the flue gas is guaranteed, and the gas exchange efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler waste heat recovery, in particular to a waste heat recovery and reuse structure for a heating boiler. Background Art

[0002] The two main losses in thermal power plants are cooling loss and exhaust heat loss, among which exhaust heat loss is the largest of all heat losses in power plant boilers.

[0003] According to statistics, in thermal power plants, exhaust heat loss from boilers accounts for 60% to 70% of the total heat loss. To reduce this heat loss, existing recovery devices typically channel the flue gas into a water tank for water-heat exchange, thus recovering the waste heat from the boiler flue gas.

[0004] However, since the boilers of thermal power plants usually use coal as fuel, the dust content in the flue gas after combustion is relatively high. Therefore, during the long period of flue gas diversion, a large amount of particulate matter is likely to adhere to the inside of the air duct of the recovery device, affecting the flow of flue gas and even causing blockage of the air duct. Utility Model Content

[0005] The purpose of this utility model is to solve the problem in the prior art that the boilers of thermal power plants usually use coal as fuel, and the dust content in the flue gas after combustion is relatively high. Therefore, during the long period of flue gas diversion, a large amount of particulate matter is easily attached to the inside of the air duct of the recovery device, affecting the flow of flue gas and even causing blockage of the air duct. A waste heat recovery and reuse structure for heating boilers is proposed.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solution: a waste heat recovery and reuse structure for a heating boiler, comprising a conversion box, wherein the outer surface of the conversion box is respectively provided with a liquid inlet pipe and a liquid outlet pipe near the upper and lower ends, and the outer surfaces of the upper and lower ends of the conversion box are respectively fixedly connected with a first conduit and a second conduit near the middle, one end of each of the first conduit and the second conduit is closed, the outer surface of the first conduit is fixedly connected to the outlet pipe, and the outer surface of the second conduit is fixedly connected to the inlet pipe;

[0007] The inner surface of the conversion box is fixedly connected to the positions corresponding to duct one and duct two with hoses. The two groups of hoses are respectively connected to the corresponding duct one and duct two. An air duct is fixedly connected between the two groups of hoses, and the air duct is serpentine. A dust cleaning mechanism is provided between the air duct and duct one and duct two, and a support mechanism is provided inside the conversion box.

[0008] Furthermore, the cleaning mechanism includes a metal rope arranged inside the air duct, and one end of the metal rope passes through the interior of the first duct and is fixedly connected to a movable plate, and the other end passes through the interior of the second duct and is fixedly connected to a blocking block. A discharge hole is provided at the bottom end of the inner surface of the second duct, and a collection frame is movably connected to the outside of the second duct, and the bottom end of the inner surface of the second duct is inclined toward the discharge hole on all sides.

[0009] Furthermore, the outer surface of the lower end of the blocking block is fixedly connected to a connecting column, and the bottom end of the connecting column passes through the interior of the collection frame and is fixedly connected to the collection frame, the outer surface of the conduit 2 is fixedly connected to a connecting ring, and the interior of the connecting ring is movably connected with two groups of limiting columns, one end of the limiting column passes through the connecting ring and is fixedly connected to the collection frame, and a spring 1 is provided on the outer surface of the limiting column at a position above the connecting ring, and one end of the spring 1 is fixedly connected to the limiting column, and the other end is fixedly connected to the connecting ring.

[0010] Furthermore, the outer surface of the upper end of the movable plate is fixedly connected to a movable column, and the movable column penetrates to the outside of the catheter and is movably connected thereto. The outer surface of the metal rope is fixedly connected to several groups of iron wires, and one end of the iron wire is fixedly connected to a collision ball.

[0011] Furthermore, the support mechanism includes a fixing ring fixedly connected to the outer surface of the air duct, and two groups of fixing columns are symmetrically fixedly connected to the outer surface of the fixing ring, one end of the fixing column is movably connected to a sleeve, and one end of the sleeve is fixedly connected to the conversion box, a spring 2 is provided inside the sleeve, and one end of the spring 2 is fixedly connected to the sleeve, and the other end is fixedly connected to the fixing column.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0013] In the utility model, by providing the mutual cooperation of the dust cleaning mechanism and the supporting mechanism, when the flue gas flows in the direction of the guide tube through the air duct and toward the guide tube one, as the air pressure inside the guide tube one changes, the rope moves back and forth along the air duct during the heat exchange between the flue gas and water to clean the inner wall of the air duct, and the cleaned particles and dust enter the interior of the collection frame through the discharge hole, thereby preventing the inside of the air duct from being blocked, ensuring the normal circulation of the flue gas, and improving the ventilation efficiency;

[0014] In addition, the metal rope and spring 2 drive the air flow box to swing back and forth along the fixed column, which not only enables the water inside the conversion box to fully contact the air duct, but also helps the particles and dust inside the air duct to fall off quickly, further improving the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a combined view of the dust cleaning mechanism and the supporting mechanism of the utility model;

[0017] Figure 3 This is a combined view of the hose and the air duct of the present invention;

[0018] Figure 4 This is a combined view of the blocking block and the collection frame of the utility model;

[0019] Figure 5 It is a structural schematic diagram of the support mechanism of the present utility model.

[0020] Figure numerals: 1. conversion box; 2. liquid inlet pipe; 3. liquid outlet pipe; 4. conduit 1; 5. conduit 2; 6. air outlet pipe; 7. hose; 8. cleaning mechanism; 81. metal rope; 82. movable plate; 83. blocking block; 84. collecting frame; 85. connecting column; 86. limiting column; 87. spring 1; 88. movable column; 89. iron wire; 80. collision ball; 9. supporting mechanism; 91. fixing ring; 92. sleeve; 93. spring 2; 94. fixing column; 10. air guide pipe. DETAILED DESCRIPTION

[0021] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Example 1: Figure 1 、 Figure 2 and Figure 5 As shown, the utility model proposes a waste heat recovery and reuse structure for a heating boiler, including a conversion box 1, and the outer surface of the conversion box 1 is respectively provided with a liquid inlet pipe 2 and a liquid outlet pipe 3 near the upper and lower ends, and the outer surfaces of the upper and lower ends of the conversion box 1 are respectively fixedly connected with a conduit 1 4 and a conduit 2 5 near the middle, one end of the conduit 1 4 and the conduit 2 5 are both closed, the outer surface of the conduit 1 4 is fixedly connected to the outlet pipe 6, and the outer surface of the conduit 2 5 is fixedly connected to the inlet pipe.

[0023] The inner surface of the conversion box 1 and the positions corresponding to the duct 1 4 and the duct 2 5 are fixedly connected with a hose 7. The two groups of hoses 7 are respectively connected to the corresponding duct 1 4 and the duct 2 5. An air duct 10 is fixedly connected between the two groups of hoses 7, and the air duct 10 is serpentine. The flue gas discharged from the boiler enters the interior of the air duct 10 through the air inlet pipe and is finally discharged through the air outlet pipe 6. In the process, it exchanges heat with the water inside the conversion box 1 to realize the recovery of the waste heat of the flue gas. A cleaning mechanism 8 is provided between the air duct 10 and the duct 1 4 and the duct 2 5, and a supporting mechanism 9 is provided inside the conversion box 1.

[0024] The supporting mechanism 9 includes a fixing ring 91 fixedly connected to the outer surface of the air duct 10, and two groups of fixing columns 94 are symmetrically fixedly connected to the outer surface of the fixing ring 91, one end of the fixing column 94 is movably connected to the sleeve 92, and one end of the sleeve 92 is fixedly connected to the conversion box 1, and a spring 2 93 is provided inside the sleeve 92, and one end of the spring 2 93 is fixedly connected to the sleeve 92, and the other end is fixedly connected to the fixing column 94. In the process of the flue gas passing through the air duct 10, the air duct 10 swings back and forth along the direction of the fixing column 94 under the combined action of the impact of the flue gas and water flow and the elastic force of the spring 2 93, so that the water inside the conversion box 1 is in full contact with the air duct 10, thereby improving the heat exchange efficiency.

[0025] Example 2: Figure 2-5 As shown, the difference between this embodiment and embodiment 1 is that the cleaning mechanism 8 includes a metal rope 81 arranged inside the air duct 10, and one end of the metal rope 81 passes through the interior of the duct 14 and is fixedly connected to a movable plate 82. The flue gas flows in the direction of the duct 14 through the air duct 10. As the air pressure inside the duct 14 increases, the movable plate 82 pushes the movable column 88 upward, and the other end passes through the interior of the duct 2 5 and is fixedly connected to a blocking block 83. At the same time, the metal rope 81 pulls the blocking block 83 to move inside the air duct 10 under the traction of the movable plate 82. A discharge hole is provided at the bottom end of the inner surface of the duct 2 5, and a collecting frame 84 is movably connected to the outside of the duct 2 5. The bottom end of the inner surface of the duct 2 5 is inclined in the direction of the discharge hole. The blocking block 83 is separated from the discharge hole. During the movement of the metal rope 81, the particulate matter attached to the surface of the air duct 10 is removed, and the removed particulate matter enters the interior of the collecting frame 84 through the discharge hole.

[0026] The outer surface of the lower end of the blocking block 83 is fixedly connected with a connecting column 85, and the bottom end of the connecting column 85 passes through the interior of the collecting frame 84 and is fixedly connected to the collecting frame 84. The outer surface of the conduit 25 is fixedly connected with a connecting ring, and the interior of the connecting ring is movably connected with two sets of limiting columns 86, one end of the limiting column 86 passes through the connecting ring and is fixedly connected to the collecting frame 84, and a spring 1 87 is provided on the outer surface of the limiting column 86 at a position above the connecting ring, and one end of the spring 1 87 is fixedly connected to the limiting column 86, and the other end is fixedly connected to the connecting ring. After the movable plate 82 moves to above the air outlet pipe 6, the flue gas is discharged through the air outlet pipe 6, and the air pressure inside the conduit 1 4 is reduced. The collecting frame 84 pulls the connecting column 85 downward under the action of the spring 1 87 and its own gravity. The metal rope 81 moves back and forth along the air guide pipe 10 during the heat exchange process between the flue gas and water to clean the inner wall of the air guide pipe 10 to prevent blockage inside the air guide pipe 10.

[0027] The outer surface of the upper end of the movable plate 82 is fixedly connected to a movable column 88, and the movable column 88 extends to the outside of the conduit 4 and is movably connected thereto. The outer surface of the metal rope 81 is fixedly connected to a plurality of groups of iron wires 89, and one end of the iron wire 89 is fixedly connected to a collision ball 80. The collision ball 80 and the iron wire 89 move with the metal rope 81 and rub against the inner wall of the air duct 10, thereby improving the cleaning effect of the air duct 10.

[0028] The working process and principle of this utility model are as follows:

[0029] Step 1: The flue gas discharged from the boiler enters the interior of the air guide pipe 10 through the air inlet pipe and is finally discharged through the air outlet pipe 6. In the process, it exchanges heat with the water inside the conversion box 1 to realize the recovery of the waste heat of the flue gas;

[0030] Step 2: Flue gas flows through the air duct 10 toward the duct 4. As the air pressure inside the duct 4 increases, the movable plate 82 pushes the movable column 88 upward. Simultaneously, the metal rope 81 moves inside the air duct 10 under the traction of the movable plate 82. The connecting column 85 pulls the collection frame 84 upward, separating the blocking block 83 from the discharge hole. During the movement of the metal rope 81, particulate matter attached to the surface of the air duct 10 is removed. The removed particulate matter enters the collection frame 84 through the discharge hole.

[0031] Step 3: After the movable plate 82 moves above the outlet pipe 6, the smoke is discharged through the outlet pipe 6, and the air pressure inside the conduit 1 4 decreases. The collection frame 84 pulls the connecting column 85 downward under the action of the spring 1 87 and its own gravity. As a result, the metal rope 81 moves back and forth along the air duct 10 during the heat exchange between the smoke and water, cleaning the inner wall of the air duct 10.

[0032] Step 4. During the movement of the metal rope 81, the air duct 10 swings back and forth along the direction of the fixed column 94 under the joint drive of the metal rope 81 and the spring 2 93, which not only enables the water inside the conversion box 1 to fully contact with the air duct 10, but also helps the particles, dust, etc. inside the air duct 10 to fall off quickly.

[0033] The above are only preferred specific implementation methods of the present invention, but the protection scope of the present invention is not limited to them. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and inventive concept of the present invention within the technical scope disclosed by the present invention, and they should be covered by the protection scope of the present invention.

Claims

1. A waste heat recovery and reuse structure for a heating boiler, comprising a conversion box (1), characterized in that: The outer surface of the conversion box (1) is provided with a liquid inlet pipe (2) and a liquid outlet pipe (3) near the upper and lower ends, and the outer surfaces of the upper and lower ends of the conversion box (1) are fixedly connected to the position of the conduit 1 (4) and the conduit 2 (5) near the middle, one end of the conduit 1 (4) and the conduit 2 (5) are both closed, the outer surface of the conduit 1 (4) is fixedly connected to the outlet pipe (6), and the outer surface of the conduit 2 (5) is fixedly connected to the inlet pipe; The inner surface of the conversion box (1) and the positions corresponding to the duct one (4) and the duct two (5) are fixedly connected with hoses (7), and the two groups of hoses (7) are respectively connected to the corresponding duct one (4) and the duct two (5). An air guide pipe (10) is fixedly connected between the two groups of hoses (7), and the air guide pipe (10) is serpentine. A dust cleaning mechanism (8) is provided between the air guide pipe (10) and the duct one (4) and the duct two (5). A supporting mechanism (9) is provided inside the conversion box (1).

2. The waste heat recovery and reuse structure for a heating boiler according to claim 1, characterized in that: The dust cleaning mechanism (8) includes a metal rope (81) arranged inside the air duct (10), and one end of the metal rope (81) passes through the inside of the first conduit (4) and is fixedly connected to a movable plate (82), and the other end passes through the inside of the second conduit (5) and is fixedly connected to a blocking block (83), a discharge hole is provided at the bottom end of the inner surface of the second conduit (5), and a collection frame (84) is movably connected to the outside of the second conduit (5), and the bottom end of the inner surface of the second conduit (5) is inclined in all directions toward the discharge hole.

3. The waste heat recovery and reuse structure for a heating boiler according to claim 2, characterized in that: The outer surface of the lower end of the blocking block (83) is fixedly connected to a connecting column (85), and the bottom end of the connecting column (85) passes through the interior of the collecting frame (84) and is fixedly connected to the collecting frame (84). The outer surface of the conduit 2 (5) is fixedly connected to a connecting ring, and the interior of the connecting ring is movably connected with two groups of limiting columns (86), one end of the limiting column (86) passes through the connecting ring and is fixedly connected to the collecting frame (84), and a spring 1 (87) is provided on the outer surface of the limiting column (86) at a position above the connecting ring, and one end of the spring 1 (87) is fixedly connected to the limiting column (86), and the other end is fixedly connected to the connecting ring.

4. The waste heat recovery and reuse structure for a heating boiler according to claim 3, characterized in that: The outer surface of the upper end of the movable plate (82) is fixedly connected to a movable column (88), and the movable column (88) penetrates the outside of the conduit (4) and is movably connected thereto. The outer surface of the metal rope (81) is fixedly connected to a plurality of groups of iron wires (89), and one end of the iron wire (89) is fixedly connected to a collision ball (80).

5. The waste heat recovery and reuse structure for a heating boiler according to claim 1, characterized in that: The support mechanism (9) comprises a fixing ring (91) fixedly connected to the outer surface of the air guide tube (10), and two groups of fixing columns (94) are symmetrically fixedly connected to the outer surface of the fixing ring (91), one end of the fixing column (94) is movably connected to a sleeve (92), and one end of the sleeve (92) is fixedly connected to the conversion box (1), and a second spring (93) is provided inside the sleeve (92), and one end of the second spring (93) is fixedly connected to the sleeve (92), and the other end is fixedly connected to the fixing column (94).

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