Heat exchanger structure and waste heat boiler

Abstract

The heat exchanger structure comprises an air guide cylinder and a heat exchange pipeline, flanges are connected to the two ends of the air guide cylinder, the heat exchange pipeline is of a continuous concave-convex structure on the outer wall of the air guide cylinder, a water outlet pipe and a water inlet pipe which extend outwards are arranged at an opening of the heat exchange pipeline, and a flow meter is arranged on the water inlet pipe; the utility model further discloses a waste heat boiler which comprises a boiler body and a smoke filter communicated with a smoke exhaust pipeline of the boiler body. The flue gas heat exchange device has the beneficial effects that when flue gas passes through the gas guide cylinder, flowing of water in the heat exchange pipeline can conduct the temperature of the side wall of the gas guide cylinder, heat exchange is achieved, the water inlet flow and the pipeline water flow condition can be monitored through the flow meter, and the heat exchange effect is good; and the heat-preservation plate is used for heat-preservation protection of the heat exchange pipeline, heat loss is reduced, and the heat utilization efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of boilers, in particular to a heat exchanger structure and a waste heat boiler. Background Art

[0002] A boiler is an energy conversion device. Electric energy or chemical energy of fuel is input into the boiler and converted into thermal energy. The boiler outputs steam, high-temperature water or organic heat carrier with a certain amount of thermal energy. In the use of boilers, gas and coal are mainly used as the main energy sources, and the energy consumption is generally relatively large.

[0003] Generally, the heat temperature of the flue gas discharged from the flue gas channel is about 160°C, but most of the existing boilers directly purify the flue gas before discharging it, and do not reuse the waste heat of the flue gas, resulting in heat waste. Utility Model Content

[0004] The purpose of the utility model is to provide a heat exchanger structure and a waste heat boiler in order to solve the above problems, as described below.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The utility model provides a heat exchanger structure, including an air guide cylinder and a heat exchange pipe, both ends of the air guide cylinder are connected with flanges, the heat exchange pipe is in a continuous concave-convex structure on the outer wall of the air guide cylinder, an outlet pipe and a water inlet pipe extending outward are provided at the opening of the heat exchange pipe, and a flow meter is provided on the water inlet pipe.

[0007] In some embodiments, a one-way valve is provided at the end of the water inlet pipe.

[0008] In some embodiments, a heat preservation plate is detachably connected to the outer wall of the air guide cylinder.

[0009] In some embodiments, the cross-section of the insulation board is an arc-shaped structure, two insulation boards are spliced ​​together in the length direction of the air guide tube, and a limiting member for limiting the position of the insulation board is provided on the flange.

[0010] In some embodiments, the limiting member includes a spring, the facing surfaces of the flange are connected to a limiting block via the spring, and a slot for plugging into the limiting block is provided on a side of the insulation board facing the flange.

[0011] In some embodiments, the facing surfaces of the two flanges are both stepped annular surfaces, the outer annular surfaces are higher than the inner annular surfaces, and the limiter and the insulation board correspond to the inner annular surfaces of the flanges.

[0012] A waste heat boiler comprises a boiler body and a flue gas filter connected to a flue gas exhaust pipe of the boiler body, wherein the exhaust end of the flue gas filter is connected to the heat exchanger.

[0013] In some embodiments, there are multiple heat exchangers, and the multiple heat exchangers are arranged in series. The water outlet pipe on the heat exchanger is connected to the water inlet pipe on the upper adjacent heat exchanger through a pipe, the water inlet pipe on the bottom heat exchange pipe is connected to the pipe, and the water outlet pipe on the top heat exchange pipe is connected to the water inlet of the boiler body.

[0014] The beneficial effects are:

[0015] When the flue gas passes through the air guide tube, the flow of water inside the heat exchange pipe can conduct heat to the temperature of the side wall of the air guide tube to achieve heat exchange. The flow meter can be used to monitor the water inlet flow and the water flow in the pipe, and the heat exchange effect is good;

[0016] Use insulation plates to provide thermal insulation protection for heat exchange pipes, reduce heat loss, and improve heat utilization efficiency;

[0017] By connecting the multi-layer heat exchangers, not only can the flue gas be guided, but also the heat exchange pipes on the outside of the air guide tube can be used to form multi-layer high utilization of the flue gas, reduce heat loss, and achieve good utilization effect of the flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the distribution structure of the heat exchange pipe in the utility model;

[0020] Figure 2 It is a schematic diagram of the installation structure of the insulation board in the utility model;

[0021] Figure 3 It is a structural schematic diagram of the flange in the utility model;

[0022] Figure 4 It is a schematic diagram of the connection structure of the utility model.

[0023] The following are the descriptions of the reference numerals:

[0024] 1. Air guide tube; 2. Heat exchange pipe; 201. Water outlet pipe; 202. Water inlet pipe; 3. Flange; 4. Limiting piece; 401. Spring; 402. Limiting block; 5. Insulation board; 501. Slot; 6. Flow meter; 7. Check valve; 8. Flue gas filter; 9. Boiler body. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0026] First embodiment:

[0027] See also Figure 1-Figure 2 As shown, the utility model provides a heat exchanger structure, including an air guide cylinder 1 and a heat exchange pipe 2, characterized in that the air guide cylinder 1 is a cylindrical structure, and flanges 3 are connected at both ends of the air guide cylinder 1. The heat exchange pipe 2 is a continuous concave-convex structure on the outer wall of the air guide cylinder 1. An outlet pipe 201 and an inlet pipe 202 extending outward are provided at the opening of the heat exchange pipe 2. A flow meter 6 is provided on the inlet pipe 202, and a one-way valve 7 is provided at the end of the inlet pipe 202. In the heat exchange operation of the device, the air guide cylinder 1 is directly connected to the flue pipe, and the heat exchange pipe 2 is located in the air guide cylinder 1. On the outside of the air cylinder 1, when the smoke passes through the air cylinder 1, the temperature of the side wall of the air cylinder 1 is high, and a continuous concave-convex structure is arranged on the outside of the air cylinder 1 to form heat exchange, and cold water is guided to the inside of the heat exchange pipe 2 through the water inlet pipe 202. During the flow of water, heat exchange can be achieved, and the temperature of the water in the heat exchange pipe 2 is increased to achieve heat exchange. In the heat exchange process, the flow meter 6 can be used to monitor the water inlet flow, and the one-way valve 7 is used to avoid water backflow, so that it is easy to find the blockage of the heat exchange pipe 2 and to monitor the pipe;

[0028] In a preferred embodiment, the heat exchange pipe 2 is arranged on the outer wall of the air guide cylinder 1 in a serpentine shape.

[0029] The second embodiment is different from the first embodiment in that:

[0030] See also Figure 1-Figure 3As shown, the outer wall of the air guide tube 1 is detachably connected with an insulation plate 5, and the insulation plate 5 is used to form insulation protection for the heat exchange pipe 2, thereby reducing heat loss and improving the utilization efficiency of heat. Furthermore, the cross section of the insulation plate 5 is an arc structure, and two insulation plates 5 are spliced ​​in the length direction of the air guide tube 1. The flange 3 is provided with a limiter 4 for limiting the insulation plate 5. The insulation plate 5 is fixed by the limiter 4. The insulation plate 5 is installed on the outside of the air guide tube 1 in a splicing manner. When damaged, the fixation of the insulation plate 5 by the limiter 4 can be released, and the damaged insulation plate 5 can be replaced. Specifically, the limiter 4 includes a spring 401, and the facing surface of the flange 3 is connected to the limiter block 402 through the spring 401. The side of the insulation plate 5 facing the flange 3 is provided with a slot 501 plugged with the limiter block 402. When the limiter 4 fixes the insulation plate 5 When the heat preservation board 5 is placed on the surface of the air guide tube 1 so as to correspond to the limit piece 4, the elasticity of the spring 401 is overcome to move the limit block 402 toward the flange 3. After the two heat preservation boards 5 are arranged on the outside of the air guide tube 1 in the length direction, the limit piece 4 is released, and the limit block 402 is pushed by the elasticity of the spring 401, so that the movable ends of the two heat preservation boards 5 are close to each other, forming an installation and fixation of the heat preservation boards 5, which can quickly position the heat preservation boards 5, and the facing surfaces of the two flanges 3 are stepped annular surfaces, and the outer annular surfaces are higher than the inner annular surfaces. The limit piece 4 and the heat preservation board 5 correspond to the inner annular surface of the flange 3, and the stepped annular surface on the flange 3 is used to limit the heat preservation board 5.

[0031] The third embodiment is different from the first embodiment in that:

[0032] See also Figure 3 As shown, the utility model provides a waste heat boiler, including a boiler body 9 and a flue gas filter 10 connected to the flue gas exhaust pipe of the boiler body 9, the exhaust end of the flue gas filter 10 is connected to the heat exchanger as in the first embodiment, further, when the heat exchanger is connected, there are multiple heat exchangers, and the multiple heat exchangers are arranged in series, the outlet pipe 201 on the heat exchanger is connected to the water inlet pipe 202 on the upper adjacent heat exchanger through a pipe, the water inlet pipe 202 on the bottom heat exchange pipe 2 is connected to the pipe, and the outlet pipe 201 on the top heat exchange pipe 2 is connected to the water inlet of the boiler body 9, so that the incoming water enters the inside of the heat exchange pipe 2 through the outlet pipe 201 on the bottom heat exchanger, and the water flows along the heat exchange pipe 2, which can absorb the heat inside the air guide tube 1, thereby realizing the utilization of the heat of the flue gas, further, there are multiple air guide tubes 1, which can not only guide the flue gas, but also use the heat exchange pipe 2 outside the air guide tube 1 to form a multi-layer high utilization of the flue gas, and the utilization effect of the flue gas is good.

[0033] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A heat exchanger structure, comprising an air guide cylinder (1) and a heat exchange pipe (2), characterized in that: Both ends of the air guide cylinder (1) are connected to flanges (3); the heat exchange pipe (2) is in a continuous concave-convex structure on the outer wall of the air guide cylinder (1); an outwardly extending water outlet pipe (201) and a water inlet pipe (202) are provided at the opening of the heat exchange pipe (2); and a flow meter (6) is provided on the water inlet pipe (202).

2. A heat exchanger structure according to claim 1, characterized in that: A one-way valve (7) is provided at the end of the water inlet pipe (202).

3. A heat exchanger structure according to claim 1, characterized in that: The outer wall of the air guide cylinder (1) is detachably connected with a heat preservation plate (5).

4. A heat exchanger structure according to claim 3, characterized in that: The cross section of the insulation board (5) is an arc surface structure, two insulation boards (5) are spliced ​​together in the length direction of the air guide tube (1), and a limiting member (4) for limiting the position of the insulation board (5) is provided on the flange (3).

5. A heat exchanger structure according to claim 4, characterized in that: The limiting member (4) comprises a spring (401), the facing surface of the flange (3) is connected to a limiting block (402) via the spring (401), and the side of the thermal insulation board (5) facing the flange (3) is provided with a slot (501) plugged into the limiting block (402).

6. A heat exchanger structure according to claim 4, characterized in that: The facing surfaces of the two flanges (3) are both stepped annular surfaces, the outer annular surfaces are higher than the inner annular surfaces, and the limiting member (4) and the insulation board (5) both correspond to the inner annular surfaces of the flanges (3).

7. A waste heat boiler, comprising a boiler body (9) and a flue gas filter (10) connected to a flue gas exhaust pipe of the boiler body (9), characterized in that: The exhaust end of the smoke filter (10) is connected to a heat exchanger structure as described in any one of claims 1 to 6.

8. A waste heat boiler according to claim 7, characterized in that: There are multiple heat exchangers, and the multiple heat exchangers are arranged in series. The water outlet pipe (201) on the heat exchanger is connected to the water inlet pipe (202) on the upper adjacent heat exchanger through a pipeline. The water inlet pipe (202) on the bottom heat exchange pipe (2) is connected to the pipeline, and the water outlet pipe (201) on the top heat exchange pipe (2) is connected to the water inlet of the boiler body (9).

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