Through-flow sleeve boiler heat exchanger

Abstract

The utility model belongs to the technical field of boilers, and particularly relates to a through-flow double-pipe boiler heat exchanger which comprises inner pipe bodies, the upper ends and the lower ends of the inner pipe bodies are connected with the top end and the bottom end of a boiler body, the inner pipe bodies are arranged around the axis of the boiler body, and the two ends of an outer pipe body arranged outside the inner pipe bodies in a sleeving mode are connected with an upper supporting plate and a lower supporting plate. An upper partition plate and a lower partition plate are arranged at the top and the bottom of the boiler body, a water inlet chamber is formed among the lower partition plate, the lower supporting plate and the boiler body, a steam chamber is formed among the upper partition plate, the upper supporting plate and the boiler body, the water inlet chamber and the steam chamber are communicated with a jacket structure formed between the inner pipe body and the outer pipe body, and a condenser is installed on the outer side of the boiler body. The condenser communicates with the interior of the boiler body through a smoke outlet formed in the boiler body. The volume of water in the pipe is reduced and the heating efficiency is improved through a simple manufacturing process and a compact volume; the condenser formed by welding the plate bodies can be used for effectively cooling flue gas.

Description

Technical Field

[0001] The utility model belongs to the technical field of boilers, and in particular relates to a cross-flow casing boiler heat exchanger. Background Art

[0002] Compared with traditional steam boilers, cross-flow steam generators produce steam faster, have a water volume of less than 30 liters, have no safety hazards, and do not require regular annual inspections. They are widely favored by the market and are widely used in national production and life. The cross-flow steam generators currently sold on the market generally have the disadvantage that when the water volume exceeds 30 liters, it is difficult to achieve safety exemption from inspection.

[0003] In order to reduce the geometric water volume of the equipment, it is mainly through reducing the water volume in a single tube, improving the high flue gas utilization rate, allowing the water and flue gas in the tube to obtain sufficient and efficient heat exchange, enhancing the evaporation efficiency, and reducing the water volume to improve the steam dryness. However, the inspection-free cross-flow steam generator is limited by the 30-liter water volume index and cannot arrange more heat exchange tubes. Therefore, how to fully increase the effective heat exchange area and heat exchange efficiency within the limited water volume index range is a problem that needs to be solved urgently in the industry. The utility model patent with the authorization announcement number CN219693218U discloses a boiler heat exchanger for a vertical two-pass steam generator. However, the upper and lower smoke chambers set therein increase the volume of the boiler, which is not conducive to the miniaturization design of the boiler, and the manufacturing process is complicated and the manufacturing cost is high. In addition, in order to make the exhaust temperature of the boiler flue gas meet the environmental protection standards, it is necessary to set a condenser with sufficient cooling effect. The existing condenser adopts 180° elbow welding, with many elbows, large water inlet resistance, complex processing and high production cost, which leads to an increase in the manufacturing cost of the boiler. Utility Model Content

[0004] In view of the above problems, the purpose of the utility model is to provide a through-flow shell and tube boiler heat exchanger to solve the problem that the existing boiler heat exchanger cannot fully increase the effective heat exchange area and heat exchange efficiency under the premise of effectively controlling the boiler volume and manufacturing cost; and the boiler flue gas condenser has complex processing and high production cost, which leads to an increase in the manufacturing cost of the boiler.

[0005] To achieve the above objectives, the utility model adopts the following technical solution: a through-flow sleeve boiler heat exchanger, comprising an inner tube body, wherein the upper and lower ends of the inner tube body are respectively connected to the top and bottom ends of the boiler furnace body, fire-blocking sealing plates are arranged at both ends of the boiler furnace body, and a plurality of inner tube bodies are arranged around the axis of the boiler furnace body, an outer tube body is sleeved on the outer side of the inner tube body, the upper and lower ends of the outer tube body are respectively connected to an upper support plate and a lower support plate, an upper partition plate and a lower partition plate are respectively arranged at the top and bottom of the boiler furnace body, a water inlet chamber is formed between the lower partition plate, the lower support plate and the boiler furnace body, a steam chamber is formed between the upper partition plate, the upper support plate and the boiler furnace body, and the water inlet chamber and the steam chamber are respectively connected to There are water inlet and water outlets and steam outlets, the water inlet chamber, the steam chamber are connected with the jacket structure formed between the inner tube body and the outer tube body, a condenser is installed on the outside of the boiler furnace body, the condenser includes a flue, a smoke exhaust port is opened on the boiler furnace body, the bottom of the flue is connected with the inside of the boiler furnace body through the smoke exhaust port, multiple rows of heat exchange tubes are inserted and welded at upper and lower intervals inside the flue, cover body 1 and cover body 2 are installed on both sides of the flue opposite to each other, multiple guide plates are arranged inside the cover body 1 and the cover body 2, a heat exchange channel is formed between the heat exchange tube, cover body 1, cover body 2 and the guide plates, and a water inlet and a water outlet are respectively arranged at the upper and lower ends of the heat exchange channel.

[0006] The beneficial effects of the utility model are as follows: there is no need to set up upper and lower smoke chambers, a simple manufacturing process can be used, and the water volume in the tube can be effectively reduced by setting up an outer tube body and an inner tube body in a relatively small boiler; the water body is evenly distributed to improve the heating efficiency; the condenser forms a heat exchange channel by arranging and welding the heat exchange tubes and guide plates, and effective cooling of the flue gas can be achieved with a relatively simple manufacturing process.

[0007] In order to effectively distribute the water flowing in the outer tube;

[0008] As a further improvement of the above technical solution: the axes of the inner tube body and the outer tube body are collinear, and the jacket structure formed between the inner tube body and the outer tube body is a circular ring-shaped cavity.

[0009] The beneficial effect of this improvement is that the water flow can fully flow in the annular cavity, thereby evenly contacting the inner wall of the outer tube body with a smaller volume flow rate.

[0010] In order to make the water evenly enter between the inner tube and the outer tube;

[0011] As a further improvement of the above technical solution: the water inlet chamber is a circular cavity structure, and the axis of the water inlet chamber is colinear with the axis of the boiler furnace body.

[0012] The beneficial effect of this improvement is that after the water enters the interior of the water inlet chamber through the inlet and outlet ports, it can flow upward at the same speed and simultaneously enter the jackets of multiple outer tubes to be heated.

[0013] In order to achieve rapid water filling and drainage of the boiler;

[0014] As a further improvement of the above technical solution: the inlet and outlet are vertically installed at the bottom of the boiler body.

[0015] The beneficial effect of this improvement is that the inlet and outlet can be used as a water inlet pipe, and can also be used as a drain pipe to completely discharge the sewage in the boiler after the boiler is used.

[0016] In order to accurately detect the liquid level of the water in the outer tube;

[0017] As a further improvement of the above technical solution: the water inlet chamber and the steam chamber are respectively connected to the upper and lower water inlets of the liquid level meter, and the liquid level meter is installed on the outside of the boiler furnace body.

[0018] The beneficial effect of this improvement is that the liquid level of the water body in the outer tube body can be intuitively and safely detected by the liquid level meter.

[0019] In order to effectively extend the flow length of the refrigerant in the condenser to ensure the cooling effect on the flue gas;

[0020] As a further improvement of the above technical solution: the structural dimensions of the cover body one and the cover body two are the same, the guide plates in the cover body one and the guide plates in the cover body two are respectively arranged on the upper and lower sides of the heat exchange tube, and the length and width of the guide plates are the same as the inner length and inner width of the cover body one and the cover body two.

[0021] The beneficial effect of this improvement is that, under the isolation of the guide plates arranged at intervals, a heat exchange channel is formed inside the condenser for the refrigerant to flow in a serpentine shape from top to bottom, thereby effectively reducing the temperature of the flue gas during its rising process.

[0022] In order to effectively improve the structural strength of the condenser;

[0023] As a further improvement of the above technical solution: a reinforcement plate is welded inside the cover body 1 and the cover body 2, the two end faces of the reinforcement plate do not contact the inner wall of the cover body 1 and the cover body 2, and the reinforcement plate is spaced apart from the guide plate.

[0024] The beneficial effect of this improvement is that the reinforcement plate is used as a skeleton to improve the structural strength of the cover body 1 and the cover body 2 which are relatively high.

[0025] In order to reduce the influence of the reinforcement plate on the refrigerant flow rate;

[0026] As a further improvement of the above technical solution: a plurality of through-hole structures are provided on the reinforcement plate.

[0027] The beneficial effect of this improvement is that the provision of the through-hole structure allows the refrigerant to quickly pass through the reinforcement plate, thereby reducing the influence of the reinforcement plate on the refrigerant flow rate.

[0028] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a cross-sectional structural diagram of the utility model;

[0030] Figure 2 It is a schematic diagram of the structure of the utility model;

[0031] Figure 3 It is a cross-sectional structural diagram of the condenser in the utility model;

[0032] Figure 4 It is a structural schematic diagram of the cover body 1 in the utility model;

[0033] Figure 5 This is a schematic diagram of the structure of the cover body 2 in the utility model;

[0034] In the figure: 1. boiler body; 2. inner tube body; 3. outer tube body; 4. lower support plate; 5. upper support plate; 6. lower partition; 7. upper partition; 10. water inlet chamber; 11. steam chamber; 12. water inlet and outlet; 13. steam outlet; 14. smoke outlet; 15. condenser; 151. flue; 152. heat exchange tube; 153. smoke outlet; 154. water outlet; 155. cover body one; 156. cover body two; 157. reinforcement plate; 158. guide plate; 159. water inlet; 160. heat exchange channel; 17. liquid level gauge; 18. fireproof sealing plate. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the present invention.

[0036] Embodiment 1:

[0037] like Figure 1—5 shows: a through-flow sleeve boiler heat exchanger, comprising an inner tube body 2, wherein the upper and lower ends of the inner tube body 2 are respectively connected to the top and bottom ends of a boiler furnace body 1, and fire-blocking sealing plates 18 are arranged at both ends of the boiler furnace body 1, and a plurality of inner tube bodies 2 are arranged around the axis of the boiler furnace body 1, and an outer tube body 3 is sleeved on the outer side of the inner tube body 2, and the upper and lower ends of the outer tube body 3 are respectively connected to an upper support plate 5 and a lower support plate 4, and an upper partition plate 7 and a lower partition plate 6 are respectively arranged on the top and bottom of the boiler furnace body 1, and a water inlet chamber 10 is formed between the lower partition plate 6, the lower support plate 4 and the boiler furnace body 1, and a steam chamber 11 is formed between the upper partition plate 7, the upper support plate 5 and the boiler furnace body 1, and the water inlet chamber 10 and the steam chamber 11 are respectively connected with an inlet and outlet port 12 and a steam outlet port 13, and the water inlet chamber 10 and the steam chamber 11 are connected with the jacket structure formed between the inner tube body 2 and the outer tube body 3, and the boiler A condenser 15 is installed on the outside of the furnace body 1. The condenser 15 includes a flue 151. A smoke exhaust port 14 is provided on the boiler furnace body 1. The bottom of the flue 151 is connected to the inside of the boiler furnace body 1 through the smoke exhaust port 14. Multiple rows of heat exchange tubes 152 are inserted and welded at intervals in the flue 151. A cover body 155 and a cover body 2 156 are installed on both sides of the flue 151. Multiple guide plates 158 are arranged at intervals in the cover body 1 155 and the cover body 2 156. A heat exchange channel 160 is formed between the heat exchange tube 152, the cover body 1 155, the cover body 2 156, and the guide plate 158. A water inlet 159 and a water outlet 154 are respectively provided at the upper and lower ends of the heat exchange channel 160. A jacket structure is formed by arranging an inner tube body 2 on the inner side of the outer tube body 3, thereby reducing the water volume in the tube; and the water body is effectively distributed, thereby improving the heating efficiency;The condenser 15 forms a heat exchange channel 160 by arranging and welding the heat exchange tube 152 and the guide plate 158, and realizes effective cooling of the flue gas with a relatively simple manufacturing process. The axes of the inner tube body 2 and the outer tube body 3 are collinear, and the jacket structure formed between the inner tube body 2 and the outer tube body 3 is a circular cavity. The water flow can fully flow in the circular cavity, so as to uniformly contact the inner wall of the outer tube body 3 with a small volume flow rate. The water inlet chamber 10 is a circular cavity structure. The axis of the water inlet chamber 10 is collinear with the axis of the boiler furnace body 1. The water body passes through the water inlet chamber 10. After the water inlet and outlet 12 enters the interior of the water inlet chamber 10, it can enter the jackets of multiple outer tube bodies 3 at the same flow rate to be heated. The water inlet and outlet 12 is vertically installed at the bottom of the boiler furnace body 1. The water inlet and outlet 12 can be used as a water inlet pipe, and can also be used as a drain pipe to completely discharge the sewage in the boiler after the boiler is used. The water inlet chamber 10 and the steam chamber 11 are respectively connected to the upper and lower water inlets of the liquid level gauge 17. The liquid level gauge 17 is installed on the outside of the boiler furnace body 1. The liquid level gauge 17 can intuitively and safely detect the water in the outer tube body 3. The liquid level of the water body, the structural dimensions of the cover body 155 and the cover body 2 156 are the same, the guide plates 158 in the cover body 155 and the guide plates 158 in the cover body 2 156 are respectively arranged on the upper and lower sides of the heat exchange tube 152, and the length and width of the guide plates 158 are the same as the inner length and inner width of the cover body 155 and the cover body 2 156. Under the isolation of the guide plates 158 arranged at intervals, a heat exchange channel 160 for the refrigerant to flow from top to bottom in a serpentine shape is formed inside the condenser 15, thereby effectively reducing the temperature of the flue gas during the rising process of the flue gas The inner parts of the cover body 155 and the cover body 2 156 are welded with a reinforcing plate 157. The two end faces of the reinforcing plate 157 do not contact the inner walls of the cover body 155 and the cover body 2 156. The reinforcing plate 157 is spaced apart from the guide plate 158. The reinforcing plate 157 is used as a skeleton to improve the structural strength of the cover body 155 and the cover body 2 156 with a larger height. The reinforcing plate 157 is provided with a plurality of through-hole structures. The through-hole structures can make the refrigerant pass through the reinforcing plate 157 quickly, thereby reducing the influence of the reinforcing plate 157 on the refrigerant flow rate. ;

[0038] The working principle of the present technical solution is as follows: the fire grate of the prior art is arranged at the lower side of the boiler furnace body 1; water enters the water inlet chamber 10 through the water inlet and outlet 12, and flows from bottom to top along the annular jacket formed between the inner tube body 2 and the outer tube body 3. The arrangement of the annular jacket effectively distributes the water flow, so that the water is fully in contact with the surface of the outer tube body 3 and is heated, and the arrangement of the inner tube body 2 effectively reduces the volume of the water in the outer tube body 3, thereby fully increasing the effective heat exchange area and heat exchange efficiency within the limited water volume index range; the water is heated and vaporized in the process of flowing upward, and the water vapor enters the steam chamber 11 and is discharged through the steam outlet 13 for collection and use; it can be monitored by the liquid level meter 17 The liquid level of the water body in the jacket; the smoke generated when the fire grate burns enters the flue 151 through the smoke exhaust port 14. In the process of the smoke flowing upward, the refrigerant enters the cover body 155 from the water inlet 159, is blocked by the diversion of multiple guide plates 158, flows in the heat exchange channel 160 in a serpentine channel, and finally flows out from the water outlet 154; when the refrigerant flows in the heat exchange tube 152, the surface temperature of the heat exchange tube 152 decreases, thereby fully reducing the temperature of the smoke flowing upward. Since the refrigerant is set high in and low out, the temperature of the heat exchange tube 152 at a high place is lower than that of the heat exchange tube 152 at the bottom, so that the smoke can be effectively discharged at a lower temperature.

[0039] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0040] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. A through-flow tube boiler heat exchanger, characterized in that: The invention comprises an inner tube body (2), wherein the upper and lower ends of the inner tube body (2) are respectively connected to the top and bottom ends of a boiler furnace body (1), and fire-blocking sealing plates (18) are arranged at both ends of the boiler furnace body (1), and a plurality of the inner tube bodies (2) are arranged around the axis of the boiler furnace body (1), and an outer tube body (3) is sleeved on the outer side of the inner tube body (2), and the upper and lower ends of the outer tube body (3) are respectively connected to an upper support plate (5) and a lower support plate (4), and the top and bottom of the boiler furnace body (1) are respectively connected to the upper and lower ends of the outer tube body (3). The boiler body (1) is provided with an upper partition (7) and a lower partition (6), respectively; a water inlet chamber (10) is formed between the lower partition (6), the lower support plate (4) and the boiler body (1); a steam chamber (11) is formed between the upper partition (7), the upper support plate (5) and the boiler body (1); the water inlet chamber (10) and the steam chamber (11) are respectively connected to an inlet and outlet port (12) and a steam outlet port (13); the water inlet chamber (10), the steam chamber (11) and the inner tube body (2 ) and the outer tube body (3), a jacket structure formed between the inner tube body (1) and the outer tube body (3) is connected, a condenser (15) is installed on the outer side of the boiler furnace body (1), the condenser (15) includes a flue (151), a smoke exhaust port (14) is opened through the boiler furnace body (1), the bottom of the flue (151) is connected to the inside of the boiler furnace body (1) through the smoke exhaust port (14), and a plurality of rows of heat exchange tubes (152) are inserted and welded at intervals in the upper and lower parts of the flue (151), and the flue ( A cover body 1 (155) and a cover body 2 (156) are installed on both sides of the heat exchange tube (152), and a plurality of guide plates (158) are arranged inside the cover body 1 (155) and the cover body 2 (156). A heat exchange channel (160) is formed between the heat exchange tube (152), the cover body 1 (155), the cover body 2 (156), and the guide plates (158). The upper and lower ends of the heat exchange channel (160) are respectively provided with a water inlet (159) and a water outlet (154).

2. The cross-flow shell and tube boiler heat exchanger according to claim 1, characterized in that: The axes of the inner tube body (2) and the outer tube body (3) are collinear, and the jacket structure formed between the inner tube body (2) and the outer tube body (3) is a circular ring-shaped cavity.

3. The cross-flow shell and tube boiler heat exchanger according to claim 1, characterized in that: The water inlet chamber (10) is a circular cavity structure, and the axis of the water inlet chamber (10) is colinear with the axis of the boiler furnace body (1).

4. The cross-flow shell and tube boiler heat exchanger according to claim 1, characterized in that: The water inlet and outlet (12) is vertically installed at the bottom of the boiler body (1).

5. The cross-flow shell and tube boiler heat exchanger according to claim 1, characterized in that: The water inlet chamber (10) and the steam chamber (11) are respectively connected to the upper and lower water inlets of a liquid level meter (17), and the liquid level meter (17) is installed on the outside of the boiler furnace body (1).

6. The cross-flow shell and tube boiler heat exchanger according to claim 1, characterized in that: The cover body 1 (155) and the cover body 2 (156) have the same structural dimensions. The guide plate (158) in the cover body 1 (155) and the guide plate (158) in the cover body 2 (156) are respectively arranged on the upper and lower sides of the heat exchange tube (152). The length and width of the guide plate (158) are the same as the inner length and inner width of the cover body 1 (155) and the cover body 2 (156).

7. The cross-flow shell and tube boiler heat exchanger according to claim 1, characterized in that: A reinforcing plate (157) is welded inside the cover body 1 (155) and the cover body 2 (156); two end surfaces of the reinforcing plate (157) do not contact the inner walls of the cover body 1 (155) and the cover body 2 (156); and the reinforcing plate (157) is spaced apart from the guide plate (158).

8. The cross-flow shell and tube boiler heat exchanger according to claim 7, characterized in that: The reinforcing plate (157) is provided with a plurality of through-hole structures.

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