A dual-zone heat exchange structure for a cyclone dust collector

Abstract

This utility model discloses a dual-zone heat exchange structure for a cyclone dust collector, including a heat exchange box. Several flue gas circulation mechanisms are installed inside the heat exchange box, and U-shaped pipes connect the top and bottom of these mechanisms in series. The heat exchange box includes a housing, on which an outlet pipe and an inlet pipe are connected. This utility model has the advantage of good heat exchange effect, solving the problem in existing cyclone dust collectors where the spiral channel only exchanges heat in a single zone. When the flue gas velocity is too high, the condensation effect is poor, affecting the condensation efficiency of fine particles in the flue gas and reducing the final dust removal effect.

Description

Technical Field

[0001] This utility model relates to the field of dust removal technology, specifically a dual-zone heat exchange structure for a cyclone dust collector. Background Technology

[0002] With increasingly stringent environmental protection requirements, industrial furnaces such as coal-fired boilers and gasifiers commonly employ wet desulfurization processes to treat flue gas. Wet desulfurization systems effectively remove most particulate matter and droplets from flue gas through spray layers and dust / mist removal equipment. However, a large amount of ultrafine dry dust and uncaptured ultrafine slurry droplets still remain in the flue gas after desulfurization. These ultrafine particles, due to their small size and light weight, are weakly affected by inertial forces and are difficult to efficiently capture using conventional dust / mist removal equipment, leading to air pollution.

[0003] Existing technologies for controlling ultrafine particulate matter primarily employ physical or chemical agglomeration methods, such as acoustic agglomeration, electric field agglomeration, turbulent collision agglomeration, chemical agglomeration, and water vapor phase change agglomeration. However, acoustic agglomeration relies on high-energy sound waves, resulting in complex equipment and high energy consumption; electric field agglomeration requires a high-voltage electric field, leading to expensive operating costs; and chemical agglomeration involves the addition of reagents and secondary pollution issues. In contrast, water vapor phase change agglomeration technology has attracted significant attention due to its unique principle. This technology constructs a supersaturated water vapor field, utilizing water vapor to undergo a phase change with ultrafine particles as condensation nuclei. Combined with diffusion and thermophoresis effects, it promotes particle migration and collision, achieving a three-stage agglomeration process of particulate matter from "activation nucleation → condensation growth → collision agglomeration," ultimately forming large particles that are easily captured. This method is particularly suitable for applications with high water vapor content in flue gas after wet desulfurization.

[0004] Although water vapor phase change agglomeration technology has theoretical advantages, existing devices still have limitations. Chinese Patent Publication No. CN117258423A describes a condensation-free dust removal and demisting separation element, device, and method for wet flue gas. This method uses a spiral channel to exchange heat with cooling water to lower the flue gas temperature, promoting water vapor condensation and particulate agglomeration. Cyclone dust removal technology is then used to separate the agglomerated particles from the flue gas, thereby achieving the goal of removing ultrafine particles from the flue gas. This dust removal technology involves three stages: condensation, collision agglomeration, and cyclone dust removal. All three steps are crucial in the dust removal process. However, the spiral channel in existing cyclone dust collectors only exchanges heat in a single zone. When the flue gas velocity is too high, the condensation effect is poor, affecting the condensation efficiency of fine particles in the flue gas and reducing the final dust removal effect.

[0005] Therefore, there is an urgent need to develop a cold vortex dust collector that can perform dual-zone heat exchange and improve heat exchange efficiency in order to enhance the condensation and dust removal effect on ultrafine particles. Utility Model Content

[0006] The purpose of this invention is to provide a dual-zone heat exchange structure for a cyclone dust collector, which has the advantage of good heat exchange effect. It solves the problem that in existing cyclone dust collectors, the spiral channel only exchanges heat through a single zone, resulting in poor condensation effect when the flue gas velocity is too fast, which affects the condensation efficiency of fine particles in the flue gas and reduces the final dust removal effect.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a dual-zone heat exchange structure for a cyclone dust collector, including a heat exchange box, wherein a plurality of flue gas circulation mechanisms are installed inside the heat exchange box, and a U-shaped pipe is connected to the top and bottom of the plurality of flue gas circulation mechanisms, and the U-shaped pipe connects the plurality of flue gas circulation mechanisms in series.

[0008] The heat exchange box includes a box body, and an outlet pipe and an inlet pipe are connected to the box body.

[0009] The flue gas circulation mechanism includes an air inlet pipe, an air outlet end of which is connected to a dust removal pipe, and an air outlet end of which is connected to an air outlet pipe. The inner cavity of the dust removal pipe is provided with a cooling water flow pipe. The surface of the cooling water flow pipe is fitted with cyclone dust removal spiral blades and condensation agglomeration spiral blades. The upper and lower ends of the cooling water flow pipe are respectively connected to a first connector and a second connector. The first connector extends to the outside of the air outlet pipe, and the second connector extends to the outside of the air inlet pipe. The first connector and the second connector are connected to a U-shaped pipe.

[0010] As a preferred embodiment of the dual-zone heat exchange structure of the cyclone dust collector of this utility model, the heat exchange box is made of thermally conductive and corrosion-resistant metal or thermally conductive and corrosion-resistant plastic. The top of the box is provided with a first cover plate, and the water outlet pipe and water inlet pipe are installed on the first cover plate. The bottom of the box is provided with a second cover plate, and a number of baffles are installed in the inner cavity of the box.

[0011] As a preferred embodiment of the dual-zone heat exchange structure of the cyclone dust collector of this utility model, several baffles are installed on the left and right sides of the inner wall of the box and are distributed alternately.

[0012] As a preferred embodiment of the dual-zone heat exchange structure of the cyclone dust collector of this utility model, the bottom of the water inlet pipe extends through the baffle plate to the bottom of the inner cavity of the box, and the bottom of the water outlet pipe extends to the top of the inner cavity of the box.

[0013] As a preferred embodiment of the dual-zone heat exchange structure of the cyclone dust collector of this utility model, the first cover plate, the second cover plate and the baffle plate are provided with mounting holes, and the dust removal pipe is installed in the mounting holes.

[0014] As a preferred embodiment of the dual-zone heat exchange structure of the cyclone dust collector of this utility model, through holes are provided around the air inlet pipe and the air outlet pipe.

[0015] As a preferred embodiment of the dual-zone heat exchange structure of the cyclone dust collector of this utility model, the opposite ends of the cyclone dust removal spiral blades and the condensation and agglomeration spiral blades are fixedly connected, the air outlet end of the cyclone dust removal spiral blades is connected to the air inlet end of the air outlet pipe, and the air inlet end of the condensation and agglomeration spiral blades is connected to the air outlet end of the air inlet pipe.

[0016] In a preferred embodiment of the dual-zone heat exchange structure of the cyclone dust collector of this utility model, the pitch of the cyclone dust collector spiral blades is smaller than the pitch of the condensation and agglomeration spiral blades, and the number of spiral turns of the cyclone dust collector spiral blades is greater than the number of spiral turns of the condensation and agglomeration spiral blades.

[0017] As a preferred embodiment of the dual-zone heat exchange structure of the cyclone dust collector of this utility model, the heat exchange box and the flue gas circulation mechanism are connected to a filter assembly. The filter assembly includes a filter shell, one end of which is threadedly connected to a water inlet head, which is connected to cooling water. The other end of the filter shell is threadedly connected to a water outlet head, one end of which is connected to a connecting pipe, and one end of the connecting pipe is connected to an adapter. The adapter is threaded onto the water inlet pipe and the second connector.

[0018] As a preferred embodiment of the dual-zone heat exchange structure of the cyclone dust collector of this utility model, the inner wall of the filter shell is movably connected to the mounting base, the water outlet end of the mounting base extends into the water outlet head and is threadedly connected thereto, and the water inlet end of the mounting base is fixedly connected to a stainless steel filter element.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] 1. This utility model significantly improves the overall system efficiency through a dual-zone synergistic heat exchange mechanism. The cooling water forms a dual circulation path inside and outside the heat exchange box and the flue gas circulation mechanism. Combined with the serpentine flow design of the baffle plate, the contact time and area between the cooling water and the flue gas are extended, realizing the superposition effect of forced convection heat exchange in the first zone and direct condensation heat exchange in the second zone. The flue gas undergoes three particle agglomeration enhancement processes in the circulation mechanism: the opposing impact agglomeration induced by the inlet through-hole, the steam condensation and quality enhancement guided by the condensation agglomeration spiral blade, and the secondary agglomeration by the impact at the outlet through-hole. Combined with the high-velocity centrifugal separation of the cyclone dust removal spiral blade, a multi-stage dust removal link of agglomeration, condensation, cyclone, and re-agglomeration is formed. Among them, the low pitch and multiple turns design of the cyclone blade strengthens the centrifugal force field, enabling large particles to be separated efficiently under the dual action of gravity and centrifugal force, and the dust removal efficiency is improved compared with the traditional structure.

[0021] 2. The standardized installation holes and U-shaped tube series connection scheme of the heat exchange box and flue gas circulation mechanism of this utility model realize the flexibility of multi-unit parallel expansion. The stainless steel filter element and sealing ring design of the filter component can effectively intercept particulate impurities in the cooling water. The water flow distribution is optimized by the semi-cylindrical filter element gradual expansion structure, reducing pressure drop loss. When the system is running, the cooling water forms a three-dimensional turbulent field under the guidance of the baffle plate, which can actively flush out the attached substances and inhibit scaling and ash accumulation. In addition, the threaded quick-release structure of the filter component makes it easy to replace the filter element. In terms of materials, the composite selection of thermally conductive and corrosion-resistant metal / plastic takes into account both heat exchange performance and chemical stability. It can still maintain heat exchange efficiency under acidic flue gas conditions, which is significantly better than the corrosion failure problem of traditional carbon steel materials. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present utility model. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the structure of the present utility model. Figure 2 ;

[0024] Figure 3 This is a cross-sectional view of the heat exchanger box of this utility model;

[0025] Figure 4 This is a schematic diagram of the flue gas circulation mechanism of this utility model;

[0026] Figure 5 Cross-section of the flue gas circulation mechanism of this utility model Figure 1 ;

[0027] Figure 6 Cross-section of the flue gas circulation mechanism of this utility model Figure 2 ;

[0028] Figure 7 This is a schematic diagram of the structure of the present utility model. Figure 3 ;

[0029] Figure 8 This is a schematic diagram of the structure of the present utility model. Figure 4 ;

[0030] Figure 9 This is a schematic diagram of the filter assembly of this utility model;

[0031] Figure 10 This is a cross-sectional view of the filter component of this utility model.

[0032] In the diagram: 1. Heat exchanger box; 2. Flue gas circulation mechanism; 3. U-shaped tube; 4. Filter assembly; 101. Box body; 102. Mounting hole; 103. First cover plate; 104. Water outlet pipe; 105. Water inlet pipe; 106. Baffle plate; 107. Second cover plate; 201. Air inlet pipe; 202. Dust removal pipe; 203. Air outlet pipe; 204. Through hole; 205. First connector; 206. Second connector; 207. Cooling water flow pipe; 208. Cyclone dust removal spiral blades; 209. Condensation and agglomeration spiral blades; 401. Filter shell; 402. Water inlet head; 403. Water outlet head; 404. Connecting pipe; 405. Adapter; 406. Mounting base; 407. Stainless steel filter element. Detailed Implementation

[0033] Please see Figures 1-10 A dual-zone heat exchange structure for a cyclone dust collector includes a heat exchange box 1. Several flue gas circulation mechanisms 2 are installed inside the heat exchange box 1. The top and bottom of the several flue gas circulation mechanisms 2 are connected by U-shaped pipes 3, and the U-shaped pipes 3 connect the several flue gas circulation mechanisms 2 in series.

[0034] External circulating cooling water enters the heat exchange box 1 and the flue gas circulation mechanism 2. The heat exchange box 1 and the flue gas circulation mechanism 2 perform dual-zone heat exchange on the flue gas. The cooling water rotates around the surface of several flue gas circulation mechanisms 2 and flows inside the flue gas circulation mechanism 2. The U-shaped tube 3 connects several flue gas circulation mechanisms 2 in series, so that the cooling water can flow inside multiple flue gas circulation mechanisms 2. After the flue gas enters the flue gas circulation mechanism 2, the cooling water condenses the flue gas inside the flue gas circulation mechanism 2. During the condensation process, the flue gas circulation mechanism 2 first collides and agglomerates the particulate matter in the flue gas, and then performs cyclone dust removal on the agglomerated particulate matter. Finally, the large particles follow the flue gas and are discharged from the top of the flue gas circulation mechanism 2, separated from the flue gas under the action of gravity and centrifugal force.

[0035] Furthermore, the material of heat exchange box 1 is a thermally conductive and corrosion-resistant metal or a thermally conductive and corrosion-resistant plastic.

[0036] Furthermore, the heat exchange box 1 includes a box body 101, on which an outlet pipe 104 and an inlet pipe 105 are connected.

[0037] Furthermore, the top of the box 101 is provided with a first cover plate 103, the water outlet pipe 104 and the water inlet pipe 105 are installed on the first cover plate 103, the bottom of the box 101 is provided with a second cover plate 107, and a number of baffles 106 are installed in the inner cavity of the box 101.

[0038] Furthermore, several baffles 106 are installed on the left and right sides of the inner wall of the housing 101 and are distributed in an alternating manner.

[0039] Furthermore, the bottom of the inlet pipe 105 extends through the baffle plate 106 to the bottom of the inner cavity of the tank 101, and the bottom of the outlet pipe 104 extends to the top of the inner cavity of the tank 101.

[0040] Furthermore, mounting holes 102 are provided on the first cover plate 103, the second cover plate 107 and the baffle plate 106, and the dust removal pipe 202 is installed in the mounting holes 102.

[0041] Furthermore, the flue gas circulation mechanism 2 includes an inlet pipe 201, the outlet end of the inlet pipe 201 is connected to a dust removal pipe 202, the outlet end of the dust removal pipe 202 is connected to an outlet pipe 203, the inner cavity of the dust removal pipe 202 is provided with a cooling water flow pipe 207, the surface of the cooling water flow pipe 207 is fitted with cyclone dust removal spiral blades 208 and condensation agglomeration spiral blades 209, the upper and lower ends of the cooling water flow pipe 207 are respectively connected to a first connector 205 and a second connector 206, the first connector 205 extends to the outside of the outlet pipe 203, the second connector 206 extends to the outside of the inlet pipe 201, and the first connector 205 and the second connector 206 are connected to the U-shaped pipe 3.

[0042] Furthermore, through holes 204 are provided around the air intake pipe 201 and the air outlet pipe 203.

[0043] Furthermore, the opposite ends of the cyclone dust collector spiral blade 208 and the condensation and agglomeration spiral blade 209 are fixedly connected. The air outlet end of the cyclone dust collector spiral blade 208 is connected to the air inlet end of the air outlet pipe 203, and the air inlet end of the condensation and agglomeration spiral blade 209 is connected to the air outlet end of the air inlet pipe 201.

[0044] Furthermore, the pitch of the cyclone dust collector spiral blade 208 is smaller than the pitch of the condensation and agglomeration spiral blade 209, and the number of spiral turns of the cyclone dust collector spiral blade 208 is greater than the number of spiral turns of the condensation and agglomeration spiral blade 209.

[0045] Furthermore, the top of the inner wall of the dust removal pipe 202 is provided with a hydrophilic layer, which is made of a high surface energy material, and the bottom of the inner wall of the dust removal pipe 202 is provided with a hydrophobic layer, which is made of a low surface energy material.

[0046] The hydrophobic layer inhibits competitive condensation on the wall surface, promoting preferential condensation of water vapor on the particle surface, while the hydrophilic layer promotes the condensation of droplets and water vapor on the wall surface, reducing secondary entrainment.

[0047] Furthermore, the heat exchange box 1 and the flue gas circulation mechanism 2 are connected to the water inlet end of a filter assembly 4. The filter assembly 4 includes a filter shell 401. One end of the filter shell 401 is threadedly connected to a water inlet head 402, which is connected to cooling water. The other end of the filter shell 401 is threadedly connected to a water outlet head 403. One end of the water outlet head 403 is connected to a connecting pipe 404, and one end of the connecting pipe 404 is connected to an adapter 405. The adapter 405 is threaded onto the water inlet pipe 105 and the second connector 206.

[0048] Furthermore, a mounting base 406 is movably connected to the inner wall of the filter housing 401. The water outlet end of the mounting base 406 extends into the interior of the water outlet head 403 and is threadedly connected thereto. A stainless steel filter element 407 is fixedly connected to the water inlet end of the mounting base 406.

[0049] Furthermore, a sealing gasket is provided at the connection between the inlet head 402 and the outlet head 403 and the filter housing 401, and a sealing ring is provided on the surface of the mounting base 406. The sealing ring contacts the inner wall of the filter housing 401 to seal the connection between the filter housing 401 and the mounting base 406.

[0050] Furthermore, the stainless steel filter element 407 has a semi-circular shape at one end and a cylindrical shape at the other end. The stainless steel filter element 407 is connected to the inner cavity of the water outlet head 403 through the mounting base 406.

[0051] The filter assembly 4 filters the cooling water entering the heat exchange box 1 and the flue gas circulation mechanism 2, removing particulate impurities from the cooling water and preventing blockage of the cooling water flow path, which would affect the heat exchange efficiency. During the operation of the filter assembly 4, the cooling water enters the filter shell 401 through the inlet head 402, and then passes through the stainless steel filter element 407 into the mounting base 406 and the outlet head 403. The stainless steel filter element 407 blocks and filters the particulate matter in the cooling water. The filtered cooling water enters the connecting pipe 404 and then enters the inlet pipe 105 and the second connector 206 through the adapter 405, so that the cooling water circulates inside the box 101 and the cooling water flow pipe 207.

[0052] When it is necessary to clean the stainless steel filter element 407, unscrew the inlet head 402 from the filter housing 401, then unscrew the filter housing 401 from the surface of the outlet head 403, and finally unscrew the mounting base 406 inside the outlet head 403 to disassemble and clean the stainless steel filter element 407.

[0053] The dual-zone heat exchange structure of the cyclone dust collector operates through the following steps:

[0054] S1. Several flue gas circulation mechanisms 2 are installed inside the heat exchange box 1, forming a closed cooling water flow cavity inside the heat exchange box 1. The filter assembly 4 filters the cooling water entering the heat exchange box 1 and the flue gas circulation mechanism 2. The cooling water enters the bottom of the cavity of the box 101 through the inlet pipe 105, flows from bottom to top through the serpentine channel formed by the baffle 106, and finally exits through the outlet pipe 104. The presence of the baffle 106 ensures that the cooling water can flow through the entire cavity space, ensuring that the cooling water contacts the flue gas circulation mechanism 2 and the flue gas inside it as much as possible, and ensuring that the cooling water can better exchange heat with the flue gas to achieve heat exchange in the first zone. The cooling water also enters the cooling water flow pipe 207 through the second connector 206 and exits through the first connector 205. The U-shaped pipe 3 connects several cooling water flow pipes 207 in series, so that the cooling water can circulate inside the cooling water flow pipe 207 to exchange heat with the flue gas to achieve heat exchange in the second zone.

[0055] S2. When the flue gas enters the flue gas flow mechanism 2, it first enters through the through hole 204 on the inlet pipe 201. Because the through hole 204 on the inlet pipe 201 is opened opposite to each other along the circumference of the pipe wall, the flue gas entering the inlet pipe 201 will flow towards each other and collide. It will also collide with the flue gas entering from the lower opening of the inlet pipe 201. The particles in the collision flow will collide and agglomerate. This is the first agglomeration, which increases the size and mass of the particles.

[0056] S3. After the flue gas enters the inlet pipe 201, the cooling water flowing in the dual zones exchanges heat with the flue gas in the dust removal pipe 202. Water vapor in the flue gas condenses on the surface of the particles. Under the guidance of the condensation and agglomeration spiral blades 209, the flue gas spirals upward, and the particles in the flue gas condense and agglomerate again. This is the second agglomeration, which increases the size and mass of the particles.

[0057] S4. After multiple condensation and agglomeration, the size and mass of the particles increase rapidly. The flue gas enters the cyclone dust collector spiral blades 208. The cyclone dust collector spiral blades 208 in this section have a small pitch and a large number of turns, which can quickly increase the flow velocity of the flue gas inside the dust collector tube 202, thereby improving the removal efficiency of dust and water vapor in the flue gas. At this time, the particle size and mass are large and the spiral flow velocity is fast, so the particulate matter in the flue gas can be removed with high efficiency.

[0058] S5. After passing through the dust removal pipe 202, the flue gas enters the outlet pipe 203 and is discharged through the through hole 204 on the outlet pipe 203. The flue gas discharged from the through holes 204 on adjacent outlet pipes 203 flows in opposite directions and collides. The particles that are not completely removed in the impact flow collide and agglomerate again, forming large-sized and large-mass particles. This is the third agglomeration, which increases the size and mass of the particles. Under the action of gravity and centrifugal force, the larger particles will separate from the flue gas, which will further improve the dust removal efficiency.

[0059] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cyclone double-zone heat exchange structure comprising a heat exchange box (1), characterized in that: The heat exchange box (1) is equipped with several flue gas circulation mechanisms (2), and the top and bottom of the flue gas circulation mechanisms (2) are connected by U-shaped pipes (3), and the U-shaped pipes (3) connect the flue gas circulation mechanisms (2) in series. The heat exchange box (1) includes a box body (101), and the box body (101) is connected to an outlet pipe (104) and an inlet pipe (105); The flue gas circulation mechanism (2) includes an air inlet pipe (201), the air outlet of the air inlet pipe (201) is connected to a dust removal pipe (202), the air outlet of the dust removal pipe (202) is connected to an air outlet pipe (203), the inner cavity of the dust removal pipe (202) is provided with a cooling water flow pipe (207), the surface of the cooling water flow pipe (207) is fitted with cyclone dust removal spiral blades (208) and condensation agglomeration spiral blades (209), the upper and lower ends of the cooling water flow pipe (207) are respectively connected to a first connector (205) and a second connector (206), the first connector (205) penetrates to the outside of the air outlet pipe (203), the second connector (206) penetrates to the outside of the air inlet pipe (201), and the first connector (205) and the second connector (206) are connected to a U-shaped pipe (3).

2. The dual-zone heat exchange structure for a cyclone separator according to claim 1, wherein: The heat exchange box (1) is made of thermally conductive and corrosion-resistant metal or thermally conductive and corrosion-resistant plastic. The top of the box body (101) is provided with a first cover plate (103), and the water outlet pipe (104) and water inlet pipe (105) are installed on the first cover plate (103). The bottom of the box body (101) is provided with a second cover plate (107), and a number of baffles (106) are installed in the inner cavity of the box body (101).

3. The dual-zone heat exchange structure for a cyclone separator according to claim 2, wherein: Several baffles (106) are installed on the left and right sides of the inner wall of the box (101) and are distributed in an alternating manner.

4. The dual-zone heat exchange structure of a cyclone dust collector according to claim 3, characterized in that: The bottom of the inlet pipe (105) extends through the baffle plate (106) to the bottom of the inner cavity of the box (101), and the bottom of the outlet pipe (104) extends to the top of the inner cavity of the box (101).

5. The dual-zone heat exchange structure of a cyclone dust collector according to claim 4, characterized in that: The first cover plate (103), the second cover plate (107) and the baffle plate (106) are provided with mounting holes (102), and the dust removal pipe (202) is installed in the mounting holes (102).

6. The dual-zone heat exchange structure of a cyclone dust collector according to claim 1, characterized in that: Through holes (204) are provided around the air inlet pipe (201) and air outlet pipe (203).

7. The dual-zone heat exchange structure of a cyclone dust collector according to claim 6, characterized in that: The cyclone dust removal spiral blade (208) and the condensation and agglomeration spiral blade (209) are fixedly connected at opposite ends. The air outlet of the cyclone dust removal spiral blade (208) is connected to the air inlet of the air outlet pipe (203), and the air inlet of the condensation and agglomeration spiral blade (209) is connected to the air outlet of the air inlet pipe (201).

8. The dual-zone heat exchange structure of a cyclone dust collector according to claim 7, characterized in that: The pitch of the cyclone dust collector spiral blade (208) is smaller than the pitch of the condensation and agglomeration spiral blade (209), and the number of spiral turns of the cyclone dust collector spiral blade (208) is greater than the number of spiral turns of the condensation and agglomeration spiral blade (209).

9. The dual-zone heat exchange structure of a cyclone dust collector according to claim 1, characterized in that: The heat exchange box (1) and the flue gas circulation mechanism (2) are connected to a filter assembly (4) at their water inlet ends. The filter assembly (4) includes a filter shell (401). One end of the filter shell (401) is threadedly connected to a water inlet head (402), which is connected to cooling water. The other end of the filter shell (401) is threadedly connected to a water outlet head (403). One end of the water outlet head (403) is connected to a connecting pipe (404), and one end of the connecting pipe (404) is connected to an adapter (405). The adapter (405) is threaded onto the water inlet pipe (105) and the second connector (206).

10. The dual-zone heat exchange structure of a cyclone dust collector according to claim 9, characterized in that: The inner wall of the filter housing (401) is movably connected to the mounting base (406), the water outlet end of the mounting base (406) extends into the water outlet head (403) and is threadedly connected thereto, and the water inlet end of the mounting base (406) is fixedly connected to the stainless steel filter element (407).

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