A heat recovery device for a steam boiler

Abstract

The utility model relates to a steam boiler technical field, concretely is a kind of heat energy recycling device of steam boiler. Including flue gas box, heat exchange device, including water delivery pipeline, water delivery pipeline is installed in the top of flue gas box, and the below of water delivery pipeline is connected with shunt plate, the below of shunt plate is connected with row pipe, the below of shunt plate is connected with water inlet pipe, and the inside of water inlet pipe is connected with coil pipe, and the end of coil pipe far from water inlet pipe is connected with drain pipe, and the below of drain pipe and row pipe is communicated with hot water pipe. Through the parallel connection of two parts coil pipe, evenly distribute in the inside of flue gas box upper and lower two parts, can effectively guarantee the efficiency of heat exchange, guarantee that flue gas is evenly heat exchanged in each position, by the above-mentioned mode can be carried out comprehensive reliable heat exchange treatment to flue gas, and then guarantee the recycling efficiency of heat energy.

Description

Technical Field

[0001] This utility model relates to the field of steam boiler technology, specifically to a heat energy recovery and utilization device for a steam boiler. Background Technology

[0002] Patent publication number CN 222926029 U discloses a heat energy recovery and utilization device for a steam boiler. It mainly includes a flue gas heat energy recovery protective cover, two first metal air guide pipes, and fourteen second metal air guide pipes. One first metal air guide pipe and seven second metal air guide pipes are arranged side-by-side at equal intervals. The outer walls of the seven second metal air guide pipes are sequentially coated with heat-insulating coatings of progressively increasing height. This utilizes the principle that a larger temperature difference results in a higher heat exchange rate, ensuring that the water and flue gas within the flue gas heat energy recovery protective cover are at a greater temperature difference at different heights. This improves the heat exchange rate and avoids the problem of traditional direct-flow flue gas flow where the heat energy in the flue gas is absorbed by the water, leading to a gradual decrease in temperature and subsequent low heat exchange rate and uneven heating of the water. The heat discharged from the steam boiler is fully recovered and utilized in subsequent comprehensive applications.

[0003] However, during the use of the aforementioned patent, the setting of the heat insulation coating will affect the heat exchange rate when the initial flue gas temperature is high, and the contact area between each pipe and the flue gas is different, which further reduces the uniformity of heat exchange. Utility Model Content

[0004] To address the above problems, the purpose of this utility model is to provide a heat energy recovery and utilization device for a steam boiler, which solves the problem that the setting of the heat insulation coating affects the heat exchange rate when the initial flue gas temperature is high, and that the different contact areas between the pipes and the flue gas further reduce the uniformity of heat exchange.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a heat energy recovery and utilization device for a steam boiler, comprising a flue gas box, a heat exchange device, and a water supply pipe. The water supply pipe is installed on the top of the flue gas box, and a diversion plate is connected to the bottom of the water supply pipe. A tube is connected to the bottom of the diversion plate, and an inlet pipe is connected to the bottom of the diversion plate. A coil is connected to the inner side of the inlet pipe, and a drain pipe is connected to the end of the coil away from the inlet pipe. A hot water pipe is connected to the bottom of the tube.

[0006] Preferably, a smoke exhaust pipe is installed at the bottom of the flue gas box, and a smoke inlet pipe is installed at the top of the flue gas box.

[0007] Preferably, the coil is divided into two parts, and the two parts are arranged in a flip-over configuration.

[0008] Preferably, the coil is S-shaped, with the two coil parts connected in parallel and evenly distributed in the upper and lower parts inside the flue gas box, which can effectively ensure the heat exchange efficiency and ensure that the flue gas is evenly heated at all locations.

[0009] Preferably, the tubes are arranged in an array, and the bottom of the tubes is connected to the hot water pipe.

[0010] Preferably, the outer side of the drain pipe is provided with a heat insulation layer.

[0011] Preferably, the hot water pipe is fixed to the flue gas box by bolts.

[0012] Preferably, the diverter plate is fixed to the flue gas box by bolts.

[0013] The beneficial effects of this utility model are as follows:

[0014] First, water enters the interior of the diverter plate through the water supply pipe. Then, the water exchanges heat with the flue gas through the tubes and coils. After heat exchange, it enters the steam boiler through the hot water pipe to participate in the preheating of the steam boiler feed water.

[0015] Second, by connecting the two coils in parallel and distributing them evenly in the upper and lower parts of the flue gas box, the heat exchange efficiency can be effectively guaranteed, ensuring that the flue gas is evenly heated at all locations. Through the above method, the flue gas can be subjected to comprehensive and reliable heat exchange treatment, thereby ensuring the efficiency of heat energy recovery and utilization. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the first isometric structure of the whole.

[0017] Figure 2 This is a schematic diagram of the overall second isometric structure.

[0018] Figure 3 This is a schematic diagram of the overall isometric sectional view.

[0019] Figure 4 This is a schematic diagram of the overall main view structure.

[0020] Figure 5 This is a schematic diagram of the isometric structure of the coil.

[0021] In the diagram: 1. Flue gas box; 11. Exhaust pipe; 12. Inlet pipe; 2. Water supply pipe; 21. Diverter plate; 22. Tube; 3. Inlet pipe; 31. Coil; 32. Drain pipe; 4. Hot water pipe. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of this utility model in any way.

[0023] like Figure 1-5 As shown, a heat recovery and utilization device for a steam boiler includes a flue gas chamber 1 and a heat exchange device, including a water supply pipe 2. The water supply pipe 2 is installed at the top of the flue gas chamber 1, and a diversion plate 21 is connected to the bottom of the water supply pipe 2. A tube 22 is connected to the bottom of the diversion plate 21, and an inlet pipe 3 is connected to the bottom of the diversion plate 21. A coil 31 is connected to the inner side of the inlet pipe 3, and a drain pipe 32 is connected to the end of the coil 31 away from the inlet pipe 3. A hot water pipe 4 is connected to the bottom of the drain pipe 32 and the tube 22. A flue gas exhaust pipe 11 is installed at the bottom of the flue gas chamber 1. The top of the flue gas chamber 1 is equipped with a flue gas inlet pipe 12. The coil 31 is divided into two parts, and the two parts are flipped. The coil 31 is S-shaped and the two parts of the coil 31 are connected in parallel and evenly distributed in the upper and lower parts inside the flue gas chamber 1. This can effectively ensure the heat exchange efficiency and ensure that the flue gas is evenly heated at all positions. The tubes 22 are arranged in an array, and the bottom of the tubes 22 is connected to the hot water pipe 4. The outside of the drain pipe 32 is provided with a heat insulation layer. The hot water pipe 4 is fixed to the flue gas chamber 1 with bolts. The diverter plate 21 is fixed to the flue gas chamber 1 with bolts.

[0024] The working principle of this utility model is as follows: When using this device, flue gas enters the interior of the flue gas box 1 through the flue gas inlet pipe 12, and then the flue gas is discharged through the flue gas outlet pipe 11. Water enters the interior of the diversion plate 21 through the water supply pipe 2. The water exchanges heat with the flue gas through the tubes 22. After heat exchange, it enters the steam boiler through the hot water pipe 4 to participate in the preheating of the steam boiler feed water. It enters the interior of the water inlet pipe 3 through the diversion plate 21. The water then participates in the preheating of the boiler feed water through the coil 31 and the drain pipe 32. The two coils 31 are connected in parallel and are evenly distributed in the upper and lower parts inside the flue gas box 1, which can effectively ensure the heat exchange efficiency and ensure that the flue gas is evenly heated at all positions. Through the above method, the flue gas can be comprehensively and reliably heat-treated, thereby ensuring the efficiency of heat energy recovery and utilization.

[0025] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0026] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of this utility model, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without modification, should all be considered within the protection scope of this utility model.

Claims

1. A heat energy recovery and utilization device for a steam boiler, characterized in that: Including the flue gas chamber, The heat exchange device includes a water supply pipe installed at the top of the flue gas box, and a diversion plate connected below the water supply pipe. A tube array is connected below the diversion plate, and an inlet pipe is connected below the diversion plate. A coil is connected to the inner side of the inlet pipe, and a drain pipe is connected to the end of the coil away from the inlet pipe. A hot water pipe is connected to the bottom of the tube array.

2. The heat energy recovery and utilization device for a steam boiler according to claim 1, characterized in that: The bottom of the flue gas box is equipped with a smoke exhaust pipe, and the top of the flue gas box is equipped with a smoke inlet pipe.

3. The heat energy recovery and utilization device for a steam boiler according to claim 1, characterized in that: The coil is divided into two parts, and the two parts are flipped.

4. The heat energy recovery and utilization device for a steam boiler according to claim 1, characterized in that: The coil is configured in an S-shape.

5. The heat energy recovery and utilization device for a steam boiler according to claim 1, characterized in that: The tubes are arranged in an array, and the bottom of the tubes is connected to the hot water pipe.

6. The heat energy recovery and utilization device for a steam boiler according to claim 1, characterized in that: The outside of the drain pipe is provided with an insulation layer.

7. The heat energy recovery and utilization device for a steam boiler according to claim 1, characterized in that: The hot water pipe is fixed to the flue gas box with bolts.

8. The heat energy recovery and utilization device for a steam boiler according to claim 1, characterized in that: The diversion plate is fixed to the flue gas box with bolts.

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