CN204478115U - Waste Heat Recovery dedusting takes off haze device - Google Patents

Abstract

The utility model discloses a device for waste heat recovery, dust removal and haze removal, which comprises an SP heat exchange tube, an upper tube plate, a lower tube plate, an inner cylinder body, a spiral plate and an outer cylinder body; the inner cylinder body is provided with a flue gas inlet nozzle and The flue gas outlet nozzle of the inner cylinder; the lower tube plate is connected with the lower tube box with the air inlet nozzle, and the upper tube plate is connected with the upper tube box with the air outlet nozzle; the spiral plate is spirally arranged on the outer wall of the inner cylinder, The upper end of the inner cylinder and the upper end of the outer cylinder are connected together by a sealing plate and a reinforcing rib plate. The upper part of the outer cylinder is provided with a nozzle for the outlet of the outer cylinder, and the lower end is connected with an ash hopper with an ash removal port. The device has high heat exchange efficiency, can prolong the construction time of the equipment, can efficiently separate and remove the dust in the flue gas, effectively reduce the emissions of CO2 and NOX, etc., and has a lower resistance loss than similar equipment under the same working conditions. It is small, and its volume is also small, which can realize heat exchange, dust removal and haze removal, and reduce the flue gas temperature.

Description

Waste heat recovery dust removal and haze removal device

technical field

The utility model relates to a high-efficiency heat exchange and dust removal device for recovery of flue gas waste heat in power station boilers, chemical heating furnaces, biomass boilers and industrial kilns, in particular to a device for reducing the dust content of flue gas in biomass boilers. A waste heat recovery dust removal and haze removal device that works under the process conditions of high temperature and high water content.

Background technique

With the continuous development of society, human beings are increasingly dependent on non-renewable energy sources, and environmental pollution is also becoming more and more serious. In order to alleviate the pressure of the environment and social development, biomass boilers are more and more favored by some enterprises. It not only solves the impact of the non-renewable energy crisis, but also eases the pressure on the environment. The fuel source of the biomass boiler is to use all discarded crops such as straw, rice straw, fuelwood, wood chips, peanut shells, melon seed shells, beet pulp, bark, etc., and finally make granules through crushing, mixing, extrusion and drying processes. Granular fuel, and some companies even further convert granular fuel into combustible gas and then burn it. This kind of fuel not only has a wide range of sources and is clean, but also solves the problem of pollution mitigation. In order to save investment costs, some companies often use conventional structures for the heat transfer surface at the tail of the boiler. Due to the limitation of site conditions or the designer’s experience, the heat transfer surface of this common structure cannot be properly designed and applied, and the heat transfer efficiency Low lead to bulky, large amount of consumables. The flue gas of the biomass boiler contains a large amount of smoke and dust, and because the moisture in the fuel is too high, the flue gas contains a large amount of water vapor, which causes abrasion and dust blocking to the ordinary heat exchange surface at the tail of the boiler, causing the heat exchange tube to wear and leak air , or the induced draft fan output is not smooth, which further causes the exhaust gas temperature to be falsely low, forming a vicious circle and causing the tail heat exchange surface to fail.

In order to avoid this situation, the boiler has to be shut down frequently, and the heat exchange surface at the tail is opened for dust cleaning, or repaired or replaced. This kind of regular maintenance not only caused the direct loss of a sharp increase in the maintenance cost of the enterprise, but also caused huge indirect losses due to the shutdown of the enterprise. Therefore, a kind of equipment that can realize high-efficiency heat exchange at the same time and can effectively solve the three major problems of ash blocking, wear and ash removal is imminent.

Utility model content

The purpose of the utility model is to overcome the problems of high efficiency, ash blocking, wear and ash removal in the prior art, and provide a waste heat recovery dust removal and haze removal device.

The utility model is realized through the following technical solutions: the waste heat recovery dust removal and haze removal device is installed vertically on the tail flue of the boiler, including SP heat exchange tubes, upper tube plates, lower tube plates, inner cylinders, spiral plates and outer tubes. Cylinder, SP heat exchange tube is built in the inner cylinder, the upper end of the SP heat exchange tube is connected with the upper tube plate, and the lower end is connected with the lower tube plate; the upper end of the inner cylinder is connected with the outer circle of the upper tube plate, and the lower end is connected with the expansion joint After the connection, it is connected with the outer circle of the lower tube plate. The expansion joint is located between the SP heat exchange tube and the inner cylinder; the upper part of the inner cylinder is provided with a flue gas inlet nozzle, and the flue gas inlet nozzle extends to the outside of the outer cylinder. The lower part of the inner cylinder is provided with an inner cylinder flue gas outlet nozzle placed in the outer cylinder; the lower tube plate is connected with the lower tube box, and the lower tube box is provided with an air inlet nozzle extending to the outer cylinder body, and the upper tube plate The upper tube box is connected, and the upper tube box is provided with an air outlet nozzle; the upper tube plate, the lower tube plate, the SP heat exchange tube and the inner cylinder form a heat exchange unit; the spiral plate is spirally arranged on the outer wall of the inner cylinder, The upper end of the inner cylinder and the upper end of the outer cylinder are connected together by a sealing plate and a reinforcing rib plate, the upper part of the outer cylinder is provided with a nozzle for the outlet of the outer cylinder, and the lower end is connected with an ash hopper with an ash removal port; The inner cylinder, spiral plate, ash hopper, and outer cylinder form a haze removal unit.

Expansion joints are used between the SP heat exchange tube and the inner cylinder, which can solve the problem of high temperature expansion difference between the two; The problem of high temperature expansion difference between them; the flue gas flows into the inner cylinder from top to bottom, and enters the channel between the inner cylinder and the outer cylinder through the flue gas outlet nozzle of the inner cylinder, and finally flows from the outer cylinder on the upper part of the outer cylinder. The flue gas outlet nozzle of the cylinder flows out, while the air flows upward from the SP heat exchange tube from bottom to top, and flows out of the device from the air outlet nozzle. The heat exchange unit and the detachment unit of the device form a three-dimensional variable space arrangement, and the three-dimensional variable space refers to the fact that due to the special shape of the heat exchange tube, the flow channel outside the tube is horizontal and multi-channel, and the vertical space is full, forming tubes with different cross-sections. The outer three-dimensional space is constantly changing, and the fluid flow has no dead angle. The layout of the three-dimensional variable space can make the device change the traditional collision flow into friction flow, optimize the flow field on the flue gas side, and make the flow field more reasonable and uniform. At the same time, it can solve the wear of the flue gas on the SP heat exchange tube and reduce the resistance loss. Under the same resistance loss, the fluid flow rate can be greatly increased, and the heat exchange efficiency of the heat exchange tube is further improved from the technical means. The spiral plate is spirally arranged on the outer wall of the inner cylinder, so that the smoke can flow along its direction. Using the principle of centrifugal force, the heavy smoke particles are thrown to the inner wall of the outer cylinder every time it rotates, and the smoke and dust under the action of gravity The particles fall down into the ash hopper along the wall of the outer cylinder or the spiral plate, and then go out through the dust removal port. The setting of the haze removal unit makes the flue gas produce severe turbulence, which destroys the thickness of the boundary laminar flow of the flue gas near the wall, improves the heat transfer efficiency of the heat exchange tube from the heat exchange mechanism, and reduces the surface area of the heat exchange tube at the same time. Possibility of fouling.

The flue gas inlet nozzle is tangent to the inner cylinder. The flue gas inlet nozzle is tangent to the inner cylinder body, which can ensure that the local resistance of the flue gas entering the inner cylinder body is small.

The flue gas outlet nozzle of the inner cylinder is provided with a first deflector, a first upper deflector, a first lower deflector, a first deflector, a first upper deflector, a first lower deflector The plate and the inner cylinder form a diversion cavity, and the first deflector is tangent to the inner cylinder. The arrangement of the first deflector, the first upper deflector and the first lower deflector can ensure that the flue gas can form a swirling flow along the outer wall of the inner cylinder after coming out of the inner cylinder.

The flue gas outlet nozzle of the outer cylinder is provided with a second deflector, a second upper deflector, a second lower deflector, a second deflector, a second upper deflector, a second lower deflector The plate and the outer cylinder form a diversion cavity, the second deflector is tangent to the outer cylinder, and the second lower deflector is tangent to the uppermost end of the spiral plate. The arrangement of the second deflector, the second upper deflector, and the second lower deflector can make the smoke flow out of the equipment smoothly without generating too much local resistance.

The outer wall of the outer cylinder is provided with an ear-type support, and the ear-type support is clamped in the flue at the tail of the boiler. The lug mounts are used to securely install the device in the tail flue of the boiler.

The flue gas enters the inner cylinder along the tangential direction through the flue gas inlet nozzle, and the flue gas goes out of the SP heat exchange tube to perform full countercurrent heat exchange with the air coming in from the air inlet nozzle. The exothermic flue gas enters the annular gap between the outer cylinder and the inner cylinder along the tangent from the flue gas outlet nozzle of the inner cylinder. Since it contains relatively large smoke and dust, in order to remove the smoke and dust in the flue gas, the inner cylinder The spiral plate arranged on the outer wall is in the annular space, so that the smoke can flow along its direction. Using the principle of centrifugal force, the heavy soot particles are thrown to the inner wall of the outer cylinder every time it rotates, and the soot particles under the action of gravity fall along the wall of the outer cylinder or the spiral plate and fall into the ash hopper, and then go through the ash removal process. Mouth out. When the flue gas reaches the flue gas outlet nozzle of the outer cylinder, the flue gas in the flue gas is already clean. And the cold air in the SP heat exchange tube goes out directly from the air outlet nozzle 1 through the upper tube box after absorbing heat.

The utility model has the advantages of:

1. Improve heat recovery efficiency by 20-40%, reduce exhaust gas temperature by 40-70°C;

2. It has a dust removal and haze reduction device, which can enhance the dust removal capacity by 30-40%, and eliminate local high temperature areas, effectively reducing CO2 and NOX emissions, energy saving and environmental protection;

3. Under the same working conditions, the resistance loss is 30-70% smaller than that of similar equipment;

4. Under the same working conditions, the volume is 30-70% smaller than similar equipment;

The biggest difference between this device and other waste heat recovery devices is that it not only has high-efficiency heat exchange capacity, but most importantly, it has the ability to prolong the fouling time of the equipment, and to efficiently separate the dust in the flue gas, and then Effective ash removal is carried out through a special structure, so that the dust content of the flue gas passing through the device is greatly reduced. The waste heat recovery device has the characteristics of haze removal. It uses the three-dimensional variable space and variable flow field design to reduce the volume and the extra space is cleverly integrated into the dust removal and haze reduction structure, realizing the effective combination of heat exchange and dust removal and haze removal. The waste heat recovery dust removal and haze removal device not only directly solves the problems of equipment wear, dust blocking and haze removal, but also indirectly solves the cost of daily replacement, repair and maintenance of equipment. Improve the efficiency of the enterprise, reach the international advanced level, realize comprehensive energy saving of 10-25%, effectively reduce the emission of CO2 and NOX, etc., energy saving and environmental protection. Improve energy-saving and emission-reduction innovation capabilities of power plant boilers and industrial boilers, improve technical measures for efficient recovery of low-temperature flue gas, dust removal and haze reduction, reduce boiler flue gas exhaust temperature, improve boiler energy-saving efficiency, reduce dust emissions, and improve the production environment of industrial boilers in various industries .

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment;

Fig. 2 is the top view of Fig. 1;

Fig. 3 is a partial schematic view of the flue gas outlet nozzle of the outer cylinder in the embodiment of the utility model;

Fig. 4 is a schematic diagram of direction A of Fig. 3;

Fig. 5 is a partial schematic diagram of the flue gas outlet nozzle of the inner cylinder in the embodiment of the utility model;

Fig. 6 is a schematic diagram in direction B of Fig. 5;

Fig. 7 is a partial schematic diagram of the flue gas inlet nozzle in the embodiment of the utility model;

Fig. 8 is a schematic structural diagram of the spiral plate in Fig. 1 .

Meanings of reference signs in the figure: 1. Air outlet nozzle; 2. Upper tube box; 3. Upper tube plate; 4. Inner cylinder; 5. Inner cylinder flue gas outlet nozzle; Lower pipe box; 8. Ash removal port; 9. Outer cylinder flue gas outlet nozzle; 10. Reinforcing ribs; 11. Flue gas inlet nozzle; 12. Sealing plate; 13. Outer cylinder body; 14. SP replacement Heat pipe; 15, spiral plate; 16, ear support; 17, lower tube plate; 18, air inlet nozzle; 19, ash bucket, 20, first deflector; 21, first upper deflector; 22, the first lower deflector; 23, the second deflector; 24, the second upper deflector; 25, the second lower deflector; α, inclination angle; L, pitch; h, screw height.

Detailed ways

The content of the present utility model will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

Example

Referring to Figure 1 and Figure 2, it is a waste heat recovery dust removal and haze removal device, which is installed vertically in the tail flue of the boiler, including SP heat exchange tube 14, upper tube plate 3, lower tube plate 17, inner cylinder 4, and spiral plate 15 and the outer cylinder 13, the SP heat exchange tube 14 is built in the inner cylinder 4, the upper end of the SP heat exchange tube 14 is connected with the upper tube plate 3, and the lower end is connected with the lower tube plate 17; the upper end of the inner cylinder 4 is connected with the upper The outer circle of the tube plate 3 is connected, the lower end is connected with the expansion joint 6 and then connected with the outer circle of the lower tube plate 17, the expansion joint 6 is located between the SP heat exchange tube 14 and the inner cylinder 4; the upper section of the inner cylinder 4 is set There is a flue gas inlet nozzle 11, and the flue gas inlet nozzle 11 extends to the outside of the outer cylinder 13, and the lower section of the inner cylinder 4 is provided with an inner cylinder flue gas outlet nozzle 5 placed in the outer cylinder 13; the lower pipe The plate 17 is connected with the lower tube box 7, the lower tube box 7 is provided with an air inlet nozzle 18 extending outside the outer cylinder body 13, the upper tube plate 3 is connected with the upper tube box 2, and the upper tube box 2 is provided with an air outlet nozzle 1. The upper tube plate 3, the lower tube plate 17, the SP heat exchange tube 14 and the inner cylinder 4 form a heat exchange unit; the spiral plate 15 is spirally arranged on the outer wall of the inner cylinder 4, and the upper end of the inner cylinder 4 and the outer cylinder The upper end of 13 is connected together by the sealing plate 12 and the reinforcing rib 10, the upper section of the outer cylinder 13 is provided with the outer cylinder flue gas outlet nozzle 9, and the lower end is connected with the ash hopper 19 with the ash removal port 8; the inner cylinder Body 4, spiral plate 15, ash hopper 19, and outer cylinder 13 form a haze removal unit.

SP heat exchange tube 14 refers to a heat exchange tube with a special shape and a spiral shape, and its full name in English is: special spiral. The heat exchange tubes are deformed tubes with various cross-sections by processing ordinary plain tubes into deformed tubes with various shapes according to the needs of different process places, and the processed cross-sectional shapes remain unchanged along the axial direction. Also called shaped tube.

The expansion joint 6 is used between the SP heat exchange tube 14 and the inner cylinder 4, which can solve the problem of high temperature expansion difference between the two; the inner cylinder 4 and the outer cylinder 13 are connected by a sealing plate 12 and a reinforcing rib 10 Together, the problem of high temperature expansion difference between the two can be solved; the flue gas passes into the inner cylinder 4 from top to bottom, and enters the gap between the inner cylinder 4 and the outer cylinder 13 through the flue gas outlet nozzle 5 of the inner cylinder The channel between them finally flows out from the outer cylinder flue gas outlet nozzle 9 on the upper part of the outer cylinder 13, while the air flows upward from the SP heat exchange tube 14 from bottom to top, and flows out of the device from the air outlet nozzle 1 . The SP heat exchange tube 14 is a tube bundle formed by several heat exchange tubes, the air flows inside the tube bundle, and the flue gas flows in reverse direction outside the tube bundle. The heat exchange unit and the detachment unit of the device form a three-dimensional variable space arrangement, and the three-dimensional variable space refers to the fact that due to the special shape of the heat exchange tube, the flow channel outside the tube is horizontal and multi-channel, and the vertical space is full, forming tubes with different cross-sections. The outer three-dimensional space is constantly changing, and the fluid flow has no dead angle. The layout of the three-dimensional variable space can make the device change the traditional collision flow into friction flow, optimize the flow field on the flue gas side, and make the flow field more reasonable and uniform. At the same time, it can solve the wear of the flue gas on the SP heat exchange tube 14 and reduce the resistance loss. Under the same resistance loss, the fluid flow rate can be greatly increased, and the heat exchange efficiency of the heat exchange tube is further improved from the technical means. The spiral plate 15 is spirally arranged on the outer wall of the inner cylinder 4, so that the smoke can flow along its direction. Using the principle of centrifugal force, the heavy smoke particles are thrown to the inner wall of the outer cylinder 13 every time it rotates once. The dust particles that act along the wall surface of the outer cylinder 13 or the spiral plate 15 concentrate and fall into the ash hopper 19, and then go out through the dust removal port. The setting of the haze removal unit makes the flue gas produce severe turbulence, which destroys the thickness of the boundary laminar flow of the flue gas near the wall, improves the heat transfer efficiency of the heat exchange tube from the heat exchange mechanism, and reduces the surface area of the heat exchange tube at the same time. Possibility of fouling.

Referring to FIG. 7 , the flue gas inlet nozzle 11 is tangent to the inner cylinder 4 . The flue gas inlet nozzle 11 is tangent to the inner cylinder body 4, which can ensure that the local resistance of the flue gas entering the inner cylinder body 4 is small.

Referring to Figure 5 and Figure 6, the flue gas outlet nozzle 5 of the inner cylinder is provided with a first deflector 20, a first upper deflector 21, a first lower deflector 22, a first deflector 20, a first The upper deflector 21 , the first lower deflector 22 and the inner cylinder 4 form a deflector cavity, and the first deflector 20 is tangent to the inner cylinder 4 . The arrangement of the first deflector 20 , the first upper deflector 21 and the first lower deflector 22 can ensure that the flue gas can form a swirling flow along the outer wall of the inner cylinder 4 after coming out of the inner cylinder 4 .

Referring to Fig. 3 and Fig. 4, the flue gas outlet nozzle 9 of the outer cylinder is provided with a second deflector 23, a second upper deflector 24, a second lower deflector 25, a second deflector 23, a second The upper deflector 24, the second lower deflector 25 and the outer cylinder 13 form a deflector cavity, the second deflector 23 is tangent to the outer cylinder 13, the second lower deflector 25 and the spiral plate 15 Tangent to the top. The arrangement of the two deflectors, the second upper deflector 24 and the second lower deflector 25 can make the flue gas flow out of the equipment smoothly without generating too much local resistance.

Referring to Fig. 1 and Fig. 2, the outer wall of the outer cylinder 13 is provided with an ear-type support 16, and the ear-type support 16 is clamped in the flue at the tail of the boiler. The ear-type support 16 is used for firmly installing the device in the tail flue of the boiler.

Referring to Figure 8, the characteristic dimensions of the spiral plate 15: the pitch L, the height h and the inclination α can all be adjusted or replaced to the most suitable parameters according to different characteristics of the flue gas. The so-called "adjustment or replacement" refers to the Previously, structural parameters were adjusted according to different flue gas characteristics, rather than random adjustments after design.

In this device, the adjustment of the characteristic size of the spiral plate 15 is the deformation of the SP heat exchange tube 14. The adjustment can control the space of the cold and hot flow field, and realize the controllable inner and outer space of the tube/cylinder side of the product system. The maximum variable diameter bumps within the pitch L are in contact with each other to form a self-support, which replaces the traditional baffle support plate, reduces the vibration of the tube bundle, and reduces the amount of consumables produced by using the baffle, making the hot and cold process fluid ( That is, the air and the flue gas fluid) produce severe turbulence, which destroys the thickness of the boundary laminar flow of the flue gas fluid near the wall, improves the heat exchange efficiency, and reduces the possibility of fouling.

The waste heat utilization and haze removal process of the utility model are as follows:

Referring to Figure 1 and Figure 2, the hollow arrows indicate the flow direction of the air, and the solid arrows indicate the flow direction of the flue gas. The flue gas enters the inner cylinder 4 along the tangential direction through the flue gas inlet nozzle 11 of the inner cylinder body, and the flue gas goes out of the SP heat exchange tube 14 to perform full countercurrent heat exchange with the air coming in from the air inlet nozzle 18 . The exothermic flue gas enters the annular gap between the outer cylinder 13 and the inner cylinder 4 along the tangent from the flue gas outlet nozzle 5 of the inner cylinder. Since it contains relatively large smoke and dust, in order to remove the smoke and dust in the flue gas , the spiral plate 15 provided on the outer wall of the inner cylinder 4 is in the annular gap, so that the smoke can flow along its direction. According to the different characteristics of the flue gas, the pitch L, screw height h, and inclination α of the spiral plate 15 can be adjusted. There is a certain distance between the height of the outermost ring of the spiral plate 15 and the outer cylinder 13. The principle of centrifugal force is used for each rotation. The heavy dust particles are thrown to the inner wall of the outer cylinder 13, and the dust particles subjected to gravity fall along the wall of the outer cylinder 13 or the spiral plate 15 and fall into the ash hopper 19, and then go out through the ash removal port 8. When the flue gas reaches the flue gas outlet nozzle 9 of the outer cylinder, the flue gas in the flue gas is already clean. And the cold air in the SP heat exchange tube 14 passes through the upper tube box 2 after absorbing heat and goes out directly from the air outlet nozzle 1 .

The utility model has the advantages of:

1. Increase the heat recovery efficiency by 20-40%, reduce the exhaust gas temperature by 40-70℃, the recovery efficiency of ordinary equipment can only reach 10-20%, and the exhaust gas temperature can only be reduced to 150℃;

2. It has a dust removal and haze reduction device, which increases the dust removal capacity by 30-40%, and eliminates local high temperature areas, effectively reducing CO2 and NOX emissions, energy saving and environmental protection. Existing heat exchange equipment on the market does not have this function;

3. Under the same working conditions, the resistance loss is 30-70% smaller than that of similar equipment. For example, the resistance level of existing equipment in the market is 300-500Pa, and the equipment of this utility model is only 150-210Pa;

4. Under the same working conditions, the volume is 30-70% smaller than that of similar equipment. For example, the volume of existing equipment in the market is 60-150m ³ , but the equipment of this utility model is only 27-45m ³

The above detailed description is a specific description of the feasible embodiment of the utility model. This embodiment is not used to limit the patent scope of the utility model. Any equivalent implementation or change that does not deviate from the utility model shall be included in this case within the scope of the patent.

Claims (5)

1. Waste Heat Recovery dedusting takes off haze device, be installed vertically on the back-end ductwork of boiler, comprise SP heat exchanger tube (14), upper perforated plate (3), lower perforated plate (17), inner barrel (4), spiral plate (15) and outer cylinder body (13), it is characterized in that: SP heat exchanger tube (14) is built in inner barrel (4), the upper end of SP heat exchanger tube (14) is connected with upper perforated plate (3), and lower end is connected with lower perforated plate (17); The upper end of inner barrel (4) is connected with the cylindrical of upper perforated plate (3), lower end is connected with the cylindrical of lower perforated plate (17) after being connected with expansion joint (6) again, and expansion joint (6) is positioned between SP heat exchanger tube (14) and inner barrel (4); The epimere of inner barrel (4) is provided with the gas approach mouth of pipe (11), the gas approach mouth of pipe (11) extends to outer cylinder body (13) outward, and the hypomere of inner barrel (4) is provided with the inner barrel exhanst gas outlet mouth of pipe (5) be placed in outer cylinder body (13); Lower perforated plate (17) is connected with lower tube box (7), lower tube box (7) is provided with and extends to outer cylinder body (13) the air intlet mouth of pipe (18) outward, upper perforated plate (3) is connected with upper tube box (2), and upper tube box (2) is provided with the air outlet slit mouth of pipe (1); Described upper perforated plate (3), lower perforated plate (17), SP heat exchanger tube (14) and inner barrel (4) composition heat exchange unit; Spiral plate (15) spirals and is arranged on the outer wall of inner barrel (4), the upper end of inner barrel (4) and the upper end of outer cylinder body (13) are linked together by shrouding (12) and deep floor (10), the epimere of outer cylinder body (13) is provided with the outer cylinder body exhanst gas outlet mouth of pipe (9), and its lower end is connected with the ash bucket (19) of band ash disposal mouth (8); The de-haze unit of described inner barrel (4), spiral plate (15), ash bucket (19), outer cylinder body (13) composition.

2. Waste Heat Recovery dedusting according to claim 1 takes off haze device, it is characterized in that: the described gas approach mouth of pipe (11) is tangent with inner barrel (4).

3. Waste Heat Recovery dedusting according to claim 1 takes off haze device, it is characterized in that: the described inner barrel exhanst gas outlet mouth of pipe (5) is provided with the first deflector (20), the first baffle upper plate (21), the first chin spoiler (22), first deflector (20), the first baffle upper plate (21), the first chin spoiler (22) and inner barrel (4) form water conservancy diversion cavity, and the first deflector (20) is tangent with inner barrel (4).

4. Waste Heat Recovery dedusting according to claim 1 takes off haze device, it is characterized in that: the described outer cylinder body exhanst gas outlet mouth of pipe (9) is provided with the second deflector (23), the second baffle upper plate (24), the second chin spoiler (25), second deflector (23), the second baffle upper plate (24), the second chin spoiler (25), water conservancy diversion cavity is formed with outer cylinder body (13), second deflector (23) is tangent with outer cylinder body (13), and the second chin spoiler (25) is tangent with the top of spiral plate (15).

5. Waste Heat Recovery dedusting according to claim 1 takes off haze device, it is characterized in that: described outer cylinder body (13) outer wall be provided with hanging support (16), hanging support (16) is fastened in described boiler back end ductwork.