Energy-saving and emission-reducing device of coal-fired boiler

Abstract

The utility model discloses an energy-saving and emission-reducing device of a coal-fired boiler, which relates to the technical field of boilers, a composite energy-saving component is arranged on a boiler main body, and the composite energy-saving component comprises a support rod, a spiral pipe, an ash pulling-out suite, a first rotating wheel and a heat exchange bin, generated high-temperature flue gas flows away from the waste gas flue, due to the fact that the spiral pipe is communicated, the high-temperature flue gas flows to the spiral pipe, heat exchange is conducted in the process that the high-temperature flue gas flows through the spiral pipe, cold water in the heat exchange bin is heated, flue gas heat is recycled, and meanwhile the flue gas with the high flow speed impacts the first rotating wheel; the first rotating wheel rotates to stir water in the heat exchange bin, and the heat exchange effect is improved; the first rotating wheel rotates to drive the ash pulling-out suite, a fireproof rake in the ash pulling-out suite stretches into the inner side of the boiler body, the fireproof rake continuously stirs fuel on the inner side of the boiler body, fuel ash can be raked to fall to an ash collecting position below, and the fuel can be combusted more sufficiently.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, in particular to an energy-saving and emission-reducing device for a coal-fired boiler. Background Art

[0002] A boiler is an energy conversion device. The energy input to the boiler includes chemical energy and electrical energy in the fuel, and the boiler outputs steam, high-temperature water or organic heat carrier with a certain amount of thermal energy. The hot water or steam generated in the boiler can directly provide the required thermal energy for industrial production and people's lives, or it can be converted into mechanical energy through a steam power device, or the mechanical energy can be converted into electrical energy through a generator.

[0003] A coal-fired boiler is a device that feeds coal into the furnace for combustion. The high-temperature flue gas generated by existing coal-fired boilers is not effectively recovered, and a large amount of heat energy is wasted. At the same time, some coal-fired boilers are filled with a large amount of fuel coal, which is piled together and blocks the ash outlet, resulting in incomplete combustion of the fuel coal. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a coal-fired boiler energy-saving and emission-reduction device, which solves the problem that a large amount of heat energy is wasted when the high-temperature flue gas generated by the coal-fired boiler is discharged and the fuel in the boiler is piled up, which easily leads to incomplete fuel combustion.

[0005] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A coal-fired boiler energy-saving and emission-reduction device, comprising a boiler body, an exhaust gas flue and a boiler support frame, wherein the boiler body is connected to the exhaust gas flue, a composite energy-saving component is installed on the boiler body, and the boiler body and the exhaust gas flue are both movably connected to the composite energy-saving component;

[0007] The composite energy-saving assembly includes a support rod, a spiral tube, a dust removal kit, a first rotor and a heat exchange chamber. The heat exchange chamber is mounted on the boiler support frame. An inclined support rod is arranged on the inner side of the heat exchange chamber. The outer wall of the support rod is wound with a spiral tube. The air inlet end of the spiral tube passes through the heat exchange chamber and is connected to the exhaust gas flue. The opening of the air outlet end of the spiral tube faces the first rotor. The first rotor is connected to the dust removal kit through a belt.

[0008] The ash removal kit includes a second rotating wheel, a transverse shaft, a slide plate, a base seat and a refractory rake. The second rotating wheel is connected to the first rotating wheel through a belt. The tooth block at the edge of the second rotating wheel is movably connected to the slide plate. The refractory rake is installed at one end of the slide plate. The bottom of the slide plate is movably connected to the base seat. A spring is installed in the gap between the slide plate and the base seat.

[0009] When the fuel in the boiler body is burned, high-temperature flue gas is generated and flows out from the exhaust gas duct. Since the spiral tube is connected to the exhaust gas duct, the high-temperature flue gas will flow to the spiral tube. During the process of the high-temperature flue gas flowing through the spiral tube, heat is exchanged, and the cold water in the heat exchange bin will be heated, thereby replacing the heat energy in the high-temperature flue gas and recovering the heat of the flue gas. At the same time, the flue gas with a faster flow rate impacts the first impeller, and the first impeller rotates to stir the water in the heat exchange bin to increase the heat exchange effect. The rotation of the first impeller will also drive the ash removal kit, and the refractory rake in the ash removal kit extends into the inside of the boiler body. The refractory rake continuously stirs the fuel inside the boiler body, and the fuel ash can be raked away and fall to the ash collection area below, which can also make the fuel burn more fully.

[0010] Preferably, the heat exchange bin is filled with cold water for heat exchange, a water inlet is provided at the bottom of the heat exchange bin, a water outlet is installed on the side wall of the heat exchange bin, and the first rotor is located on the inner side of the heat exchange bin.

[0011] Preferably, the first impeller includes a central shaft and a fan plate, the opening of the air outlet end of the spiral tube faces the fan plate, the fan plate is installed on the outer wall of the central shaft, the central shaft passes through the side wall of the heat exchange chamber and is movably connected thereto, and the central shaft is connected to the second impeller via a belt.

[0012] Preferably, the diameter of the central axis is smaller than the diameter of the second rotating wheel.

[0013] Preferably, the skateboard includes a plate body, a triangular block and a baffle, the triangular block is movably connected to the tooth block at the edge of the second rotating wheel, the triangular block is installed on the top end of the plate body, the baffle is installed on the bottom end of the plate body, and the baffle is movably connected to the spring.

[0014] Preferably, the refractory rake extends into the inner side of the boiler body and is movably connected thereto.

[0015] The utility model provides a coal-fired boiler energy-saving and emission-reduction device, which has the following beneficial effects compared with the prior art:

[0016] 1. This coal-fired boiler energy-saving and emission-reduction device, in which the fuel in the boiler body is burned, generates high-temperature flue gas that flows away from the exhaust gas flue. Since the spiral tube is connected to the exhaust gas duct, the high-temperature flue gas will flow to the spiral tube. During the high-temperature flue gas flowing through the spiral tube, heat is exchanged. The cold water in the heat exchange bin will be heated, and the heat of the flue gas will be recovered. At the same time, the flue gas with a faster flow rate impacts the first impeller, and the first impeller rotates to stir the water in the heat exchange bin to increase the heat exchange effect.

[0017] 2. In the energy-saving and emission-reduction device for coal-fired boilers, the rotation of the first impeller also drives the ash-removing kit. The refractory rake in the ash-removing kit extends into the inner side of the boiler body. The refractory rake continuously stirs the fuel inside the boiler body, and the fuel ash can be raked away and dropped to the ash collection area below, which can also make the fuel burn more fully. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the composite energy-saving component of the utility model;

[0020] Figure 3 It is a top view schematic diagram of the composite energy-saving component of the utility model;

[0021] Figure 4 This is a schematic diagram of the first rotating wheel structure of the utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the dust removal kit of the utility model;

[0023] Figure 6 It is a schematic diagram of the structure of a refractory rake of the utility model.

[0024] In the figure: 1. boiler body; 2. exhaust flue; 3. composite energy-saving component; 31. support rod; 32. spiral tube; 33. ash removal kit; 331. second rotor; 332. transverse shaft; 333. spring; 334. slide plate; 3341. plate body; 3342. triangular block; 3343. baffle; 335. base seat; 336. refractory rake; 34. first rotor; 341. central shaft; 342. fan plate; 35. heat exchange chamber; 4. boiler support frame. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-Figure 6 The utility model provides a technical solution, a coal-fired boiler energy-saving and emission-reduction device, comprising a boiler body 1, an exhaust gas flue 2 and a boiler support frame 4, the boiler body 1 is connected to the exhaust gas flue 2, a composite energy-saving component 3 is installed on the boiler body 1, and the boiler body 1 and the exhaust gas flue 2 are both movably connected to the composite energy-saving component 3;

[0027] The composite energy-saving component 3 includes a support rod 31, a spiral tube 32, a dust removal kit 33, a first rotor 34 and a heat exchange chamber 35. The heat exchange chamber 35 is mounted on the boiler support frame 4. The inner side of the heat exchange chamber 35 is arranged with an inclined support rod 31. The outer wall of the support rod 31 is wound with the spiral tube 32. The air inlet end of the spiral tube 32 passes through the heat exchange chamber 35 and is connected to the exhaust gas flue 2. The opening of the air outlet end of the spiral tube 32 faces the first rotor 34. The first rotor 34 is connected to the dust removal kit 33 through a belt.

[0028] The ash removal kit 33 includes a second rotating wheel 331, a transverse shaft 332, a slide plate 334, a base seat 335 and a refractory rake 336. The second rotating wheel 331 is connected to the first rotating wheel 34 through a belt. The tooth block at the edge of the second rotating wheel 331 is movably connected to the slide plate 334. The refractory rake 336 is installed at one end of the slide plate 334. The refractory rake 336 extends into the inner side of the boiler body 1 and is movably connected thereto. The bottom of the slide plate 334 is movably connected to the base seat 335. A spring 333 is installed in the gap between the slide plate 334 and the base seat 335.

[0029] Preferably, the heat exchange chamber 35 is filled with cold water for heat exchange, a water inlet is provided at the bottom of the heat exchange chamber 35 , a water outlet is installed on the side wall of the heat exchange chamber 35 , and the first impeller 34 is located on the inner side of the heat exchange chamber 35 .

[0030] When the fuel in the boiler body 1 is burned, high-temperature flue gas is generated and flows away from the exhaust flue 2. Since the spiral tube 32 is connected to the exhaust flue 2, the high-temperature flue gas will flow to the spiral tube 32. During the high-temperature flue gas flowing through the spiral tube 32, heat is exchanged, and the cold water in the heat exchange bin 35 will be heated, thereby replacing the heat energy in the high-temperature flue gas and recovering the heat of the flue gas. At the same time, the flue gas with a faster flow rate impacts the first impeller 34, and the first impeller 34 rotates to stir the water in the heat exchange bin 35 to increase the heat exchange effect. The rotation of the first impeller 34 will also drive the ash removal kit 33. The refractory rake 336 in the ash removal kit 33 extends into the inner side of the boiler body 1. The refractory rake 336 continuously stirs the fuel inside the boiler body 1, and the fuel ash can be raked away and fall to the ash collection area below, which can also make the fuel burn more fully.

[0031] The first rotating wheel 34 includes a central axis 341 and a fan plate 342. The opening of the air outlet end of the spiral tube 32 faces the fan plate 342. The fan plate 342 is installed on the outer wall of the central axis 341. The central axis 341 passes through the side wall of the heat exchange chamber 35 and is movably connected thereto. The central axis 341 is connected to the second rotating wheel 331 through a belt, wherein the flue gas with a faster flow rate impacts the fan plate 342 and drives the first rotating wheel 34 to rotate. The first rotating wheel 34 rotates to stir the water in the heat exchange chamber 35 to increase the heat exchange effect. The first rotating wheel 34 is linked to the second rotating wheel 331 through a belt.

[0032] The diameter of the central shaft 341 is smaller than the diameter of the second rotor 331 , which can reduce the rotation speed of the second rotor 331 and also reduce the movement frequency of the refractory rake 336 .

[0033] The slide plate 334 includes a plate body 3341, a triangular block 3342 and a baffle 3343. The triangular block 3342 is movably connected to the tooth block at the edge of the second rotating wheel 331. The triangular block 3342 is installed at the top of the plate body 3341. The baffle 3343 is installed at the bottom of the plate body 3341. The baffle 3343 is movably connected to the spring 333. When the second rotating wheel 331 rotates, the second rotating wheel 331 drives the triangular block 3342, and the triangular block 3342 is forced to move. Since the second rotating wheel 331 rotates slowly, after the tooth block of the second rotating wheel 331 moves the triangular block 3342, the slide plate 334 can quickly return to the initial position.

[0034] To sum up: when the fuel in the boiler body 1 is burned, high-temperature flue gas is generated and flows away from the exhaust gas flue 2. Since the spiral tube 32 is connected to the exhaust gas flue 2, the high-temperature flue gas will flow to the spiral tube 32. During the high-temperature flue gas flowing through the spiral tube 32, heat is exchanged, and the cold water in the heat exchange bin 35 will be heated, thereby replacing the heat energy in the high-temperature flue gas and recovering the heat of the flue gas; at the same time, the flue gas with a faster flow rate impacts the first rotor 34, and the first rotor 34 rotates to stir the water in the heat exchange bin 35 to increase the heat exchange effect; the rotation of the first rotor 34 will also drive the ash removal kit 33, and the refractory rake 336 in the ash removal kit 33 extends into the inner side of the boiler body 1. The refractory rake 336 continuously stirs the fuel inside the boiler body 1, and the fuel ash can be raked away and fall to the ash collection area below, which can also make the fuel burn more fully.

[0035] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0036] It should be noted that the above shows and describes the basic principles, main features and advantages of the utility model. Technical personnel in this industry should understand that the utility model is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which shall fall within the scope of the utility model to be protected. The scope of protection of the utility model shall be defined by the attached claims and their equivalents.

Claims

1. A coal-fired boiler energy-saving and emission-reduction device, comprising a boiler body (1), an exhaust gas flue (2) and a boiler support frame (4), wherein the boiler body (1) is connected to the exhaust gas flue (2), and is characterized in that: The composite energy-saving component (3) is installed on the boiler body (1), and the boiler body (1) and the exhaust gas flue (2) are both movably connected to the composite energy-saving component (3); The composite energy-saving component (3) comprises a support rod (31), a spiral tube (32), a dust removal kit (33), a first rotor (34) and a heat exchange chamber (35); the heat exchange chamber (35) is mounted on a boiler support frame (4); an inclined support rod (31) is arranged on the inner side of the heat exchange chamber (35); the spiral tube (32) is wound around the outer wall of the support rod (31); the air inlet end of the spiral tube (32) passes through the heat exchange chamber (35) and is connected to the exhaust gas flue (2); the opening of the air outlet end of the spiral tube (32) faces the first rotor (34); and the first rotor (34) is connected to the dust removal kit (33) via a belt; The ash removal kit (33) comprises a second rotating wheel (331), a transverse shaft (332), a slide plate (334), a base seat (335) and a refractory rake (336); the second rotating wheel (331) is connected to the first rotating wheel (34) via a belt; a tooth block at the edge of the second rotating wheel (331) is movably connected to the slide plate (334); a refractory rake (336) is installed at one end of the slide plate (334); the bottom of the slide plate (334) is movably connected to the base seat (335); and a spring (333) is installed in the gap between the slide plate (334) and the base seat (335).

2. The coal-fired boiler energy-saving and emission-reduction device according to claim 1, characterized in that: The heat exchange chamber (35) is filled with cold water for heat exchange, a water inlet is provided at the bottom of the heat exchange chamber (35), a water outlet is provided on the side wall of the heat exchange chamber (35), and the first rotor (34) is located on the inner side of the heat exchange chamber (35).

3. The coal-fired boiler energy-saving and emission-reduction device according to claim 1, characterized in that: The first rotating wheel (34) comprises a central shaft (341) and a fan plate (342); the opening of the air outlet end of the spiral tube (32) faces the fan plate (342); the fan plate (342) is mounted on the outer wall of the central shaft (341); the central shaft (341) passes through the side wall of the heat exchange chamber (35) and is movably connected thereto; the central shaft (341) is connected to the second rotating wheel (331) via a belt.

4. The coal-fired boiler energy-saving and emission-reduction device according to claim 3 is characterized in that: The diameter of the central shaft (341) is smaller than the diameter of the second rotating wheel (331).

5. The coal-fired boiler energy-saving and emission-reduction device according to claim 1, characterized in that: The slide plate (334) comprises a plate body (3341), a triangular block (3342) and a baffle (3343); the triangular block (3342) is movably connected to a tooth block at an edge of the second rotating wheel (331); the triangular block (3342) is mounted on the top end of the plate body (3341); the baffle (3343) is mounted on the bottom end of the plate body (3341); and the baffle (3343) is movably connected to a spring (333).

6. The coal-fired boiler energy-saving and emission-reduction device according to claim 1, characterized in that: The refractory rake (336) extends into the inner side of the boiler body (1) and is movably connected thereto.

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