Gas engine set flue gas and high-temperature internal circulation water waste heat utilization device

Abstract

The utility model belongs to coal mine gas power generation waste heat utilization technical field especially is a kind of gas generator set flue gas and high temperature inner circulation water waste heat utilization device, including heat exchange subassembly, primary preheating box and secondary preheating box, wherein:the heat exchange subassembly includes heat exchange box and the Z type flue gas pipe fixedly connected in heat exchange box inside, the air inlet of Z type flue gas pipe is connected with flue gas inlet pipe, and the exhaust port of Z type flue gas pipe is connected with flue gas connecting pipe, and the inside of heat exchange box is fixedly connected with heat exchange pipeline.The utility model is heated to the water in heat exchange box by boiler flue gas, the steam produced after heating enters into primary preheating box, realizes the primary preheating of entering water, and the heat in exhaust flue gas can be recycled and reused, carries out the secondary preheating of this water, can reduce the heat exchange pressure of heat exchange box, increases heat exchange effect, effectively improves the heat exchange heat of water, solves the problem of poor waste heat utilization effect of present stage device.

Description

Technical Field

[0001] This utility model relates to the field of waste heat utilization technology in coal mine gas power generation, specifically a waste heat utilization device for flue gas and high-temperature internal circulating water in coal mine gas generator sets. Background Technology

[0002] Coalbed methane, commonly known as "gas," is mainly composed of CH4 (methane) and is a by-product gas primarily found in coal mines. It is a high-calorific-value, pollution-free new energy source, often used for combustion in coal mine gas generator sets. During operation, these sets emit high-temperature flue gas with significant waste heat; direct emission would result in substantial heat loss. Current methods typically involve heat exchangers to transfer heat from the flue gas to water, thus heating the water. However, the exhaust gas from the heat exchanger generally still contains heat, which current devices cannot recover and utilize. Consequently, they cannot preheat the water within the heat exchanger, reducing waste heat utilization efficiency. Furthermore, they cannot utilize the steam within the heat exchanger to preheat the water. Therefore, the current waste heat utilization efficiency of these devices is insufficient and requires improvement. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this utility model provides a waste heat utilization device for flue gas and high-temperature internal circulating water in a gas generator set. The device heats water in a heat exchanger box using boiler flue gas, and the resulting steam enters a primary preheating box to preheat the water. The heat from the exhaust flue gas is recovered and reused for secondary preheating of the water. This reduces the heat exchange pressure in the heat exchanger box, increases the heat exchange effect, and effectively improves the heat exchange capacity of the water, thus solving the problem of poor waste heat utilization in current devices.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0007] A waste heat utilization device for flue gas and high-temperature internal circulating water in a gas generator set includes a heat exchange assembly, a primary preheating box, and a secondary preheating box. The heat exchange assembly includes a heat exchange box and a Z-shaped flue gas pipe fixedly connected to the inside of the heat exchange box. A flue gas inlet pipe is connected to the inlet of the Z-shaped flue gas pipe, and a flue gas connecting pipe is connected to the outlet of the Z-shaped flue gas pipe. A heat exchange pipe is fixedly connected to the inside of the heat exchange box. A water inlet pipe and a water connecting pipe are respectively connected to both sides of the primary preheating box. A steam output mechanism is fixedly connected to the inside of the primary preheating box. The end of the water connecting pipe is connected to the secondary preheating box. A disc-shaped smoke pipe is fixedly connected to the inside of the secondary preheating box. One end of the disc-shaped smoke pipe is connected to the flue gas connecting pipe, and the other end of the disc-shaped smoke pipe extends to the outside of the secondary preheating box and is equipped with an exhaust pipe. A water guide pipe is connected between the outlet of the secondary preheating box and the inlet of the heat exchange pipe.

[0008] Furthermore, the steam output mechanism includes a disc-shaped pipe fixedly connected to the inside of the primary preheating box, and the disc-shaped pipe has an array of through holes. A steam pipe is connected to one side of the heat exchange box, and the end of the steam pipe is connected to the disc-shaped pipe.

[0009] Furthermore, the heat exchanger box is connected to a water inlet pipe at its water inlet interface.

[0010] Furthermore, the upper part of the primary preheating box is connected to an air outlet pipe.

[0011] Furthermore, it also includes an insulation box, wherein a hot water pipe is connected between the outlet port of the heat exchange pipe and the inlet port of the insulation box, and an outlet pipe is connected to one side of the insulation box.

[0012] Furthermore, the inner walls of the heat exchange box, the primary preheating box, and the secondary preheating box are all provided with a heat insulation layer.

[0013] (III) Beneficial Effects

[0014] Compared with the prior art, this utility model provides a device for utilizing the waste heat of flue gas and high-temperature internal circulating water in a gas generator set, which has the following beneficial effects:

[0015] 1. This utility model, by setting up a primary preheating box and a secondary preheating box, wherein the primary preheating box is equipped with a steam output mechanism, the main body of which is a disc-shaped pipe. The water in the heat exchange box generates steam (the flue gas heats the water to a high temperature). The steam enters the disc-shaped pipe through the steam pipe and is discharged through the through hole, uniformly heating the water in the primary preheating box. The preheated water enters the secondary preheating box, which is equipped with a disc-shaped flue gas pipe. The flue gas after heat exchange enters the disc-shaped flue gas pipe, and the water is preheated a second time through the waste heat. Therefore, the water undergoes two preheating processes before entering the heat exchange pipe, which can effectively preheat the water, thereby reducing the heat exchange pressure of the heat exchange components, allowing the water in the heat exchange pipe to be fully heated, increasing the heat exchange effect, raising the water temperature, and making the heat exchange effect more energy-saving and efficient.

[0016] 2. This utility model, by setting a Z-shaped flue gas pipe inside the heat exchange box, can achieve full contact between flue gas heat and water, and facilitate the recovery of flue gas heat. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the heat exchange component in this utility model;

[0019] Figure 3 This is a schematic diagram of the steam output mechanism in this utility model.

[0020] In the diagram: 1. Heat exchange assembly; 101. Heat exchange box; 102. Heat exchange pipe; 103. Z-shaped flue gas pipe; 104. Water inlet pipe one; 105. Flue gas inlet pipe; 2. Water inlet pipe two; 3. Primary preheating box; 4. Steam output mechanism; 401. Disc pipe; 402. Through hole; 5. Water connection pipe; 6. Exhaust pipe; 7. Disc smoke pipe; 8. Secondary preheating box; 9. Flue gas connection pipe; 10. Water guide pipe; 11. Steam pipe; 12. Water outlet pipe; 13. Insulation box; 14. Hot water pipe. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example

[0023] like Figure 1 and Figure 2 As shown in the figure, an embodiment of this utility model proposes a waste heat utilization device for flue gas and high-temperature internal circulating water in a gas generator set, including a heat exchange assembly 1, a primary preheating box 3, and a secondary preheating box 8. The heat exchange assembly 1 includes a heat exchange box 101 and a Z-shaped flue gas pipe 103 fixedly connected to the inner side of the heat exchange box 101. A flue gas inlet pipe 105 is connected to the inlet of the Z-shaped flue gas pipe 103, and a flue gas connecting pipe 9 is connected to the outlet of the Z-shaped flue gas pipe 103. A heat exchange pipe 102 is fixedly connected to the inner side of the heat exchange box 101. The first-stage preheating box 3 is connected to the two sides of the water inlet pipe 2 and the water connection pipe 5 respectively. The steam output mechanism 4 is fixedly connected to the inside of the first-stage preheating box 3. The end of the water connection pipe 5 is connected to the second-stage preheating box 8. The disc-shaped smoke pipe 7 is fixedly connected to the inside of the second-stage preheating box 8. One end of the disc-shaped smoke pipe 7 is connected to the flue gas connection pipe 9. The other end of the disc-shaped smoke pipe 7 extends to the outside of the second-stage preheating box 8 and is provided with a flue gas exhaust pipe 6. A water guide pipe 10 is connected between the drain outlet of the second-stage preheating box 8 and the water inlet port of the heat exchange pipe 102.

[0024] It should be noted that the heat exchange component 1 realizes the recovery and utilization of flue gas heat. The main body of the heat exchange component 1 is the heat exchange box 101 and the Z-shaped flue gas pipe 103 installed in the heat exchange box 101. The Z-shaped flue gas pipe 103 is used for flue gas circulation, which in turn heats the water in the heat exchange box 101 until it becomes high-temperature water. The Z-shaped flue gas pipe 103 has a large contact area with water due to its Z-shaped design, thereby increasing the heat exchange efficiency and effectively heating the water in the heat exchange box 101. By setting a heat exchange pipe 102 inside the heat exchange box 101, clean water flows through the heat exchange pipe 102, which is then heated by the high-temperature water in the heat exchange box 101 to achieve the heat exchange effect. By setting a primary preheating box 3 and a secondary preheating box 8, it is possible to divide the heat exchange process into two parts. The first-stage preheating box 3 is equipped with a steam output mechanism 4 on its inner side, which allows the steam generated in the heat exchange box 101 to be transferred to the steam output mechanism 4 and then dispersed. The steam preheats the water in the first-stage preheating box 3. The water after the first stage of preheating enters the second-stage preheating box 8 through the water connection pipe 5 for secondary preheating. The second-stage preheating box 8 is equipped with a disc-type flue gas pipe 7 for transporting flue gas. The flue gas after heat exchange undergoes secondary heat conversion, further absorbing the heat in the flue gas, and then heating the water in the second-stage preheating box 8. The water after secondary preheating enters the heat exchange pipe 102 through the water guide pipe 10 to achieve water heating.

[0025] like Figure 1 and Figure 3As shown, in some embodiments, the steam output mechanism 4 includes a disc pipe 401 fixedly connected to the inside of the primary preheating box 3, and the disc pipe 401 is provided with an array of through holes 402. A steam pipe 11 is connected to one side of the heat exchange box 101, and the end of the steam pipe 11 is connected to the disc pipe 401.

[0026] It should be noted that the disc pipe 401 is the main part of the steam output mechanism 4. By opening an array of through holes 402 on the disc pipe 401, the steam can be sprayed out evenly, thereby uniformly heating the water in the first-stage preheating box 3.

[0027] like Figure 2 As shown, in some embodiments, the water inlet of the heat exchange box 101 is connected to a water inlet pipe 104, so that external water enters the heat exchange box 101 for water replenishment. The water entering the heat exchange box 101 can form high-temperature water under the action of the Z-shaped flue gas pipe 103, and then heat the water in the heat exchange pipe 102.

[0028] like Figure 1 As shown, in some embodiments, the upper part of the primary preheating box 3 is connected to an exhaust pipe to discharge excess gas.

[0029] like Figure 1 As shown, in some embodiments, a heat exchanger 13 is also included, a hot water pipe 14 is connected between the outlet port of the heat exchange pipe 102 and the inlet port of the heat exchanger 13, and a water outlet pipe 12 is connected to one side of the heat exchanger 13.

[0030] It should be noted that the insulated box 13 is designed to store hot water temporarily, and then discharge it when needed.

[0031] like Figure 1 As shown, in some embodiments, the inner walls of the heat exchange box 101, the primary preheating box 3, and the secondary preheating box 8 are all provided with a heat insulation layer to prevent heat loss.

[0032] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A device for utilizing waste heat from flue gas and high-temperature internal circulating water in a gas generator set, characterized in that: It includes a heat exchange assembly (1), a primary preheating box (3), and a secondary preheating box (8), wherein: The heat exchange assembly (1) includes a heat exchange box (101) and a Z-shaped flue gas pipe (103) fixedly connected to the inside of the heat exchange box (101). A flue gas inlet pipe (105) is connected to the inlet of the Z-shaped flue gas pipe (103), and a flue gas connecting pipe (9) is connected to the outlet of the Z-shaped flue gas pipe (103). A heat exchange pipe (102) is fixedly connected to the inside of the heat exchange box (101). The first-stage preheating box (3) is connected to a water inlet pipe (2) and a water connection pipe (5) on both sides respectively. A steam output mechanism (4) is fixedly connected to the inside of the first-stage preheating box (3). The end of the water connection pipe (5) is connected to the second-stage preheating box (8). A disc-shaped smoke pipe (7) is fixedly connected to the inside of the second-stage preheating box (8). One end of the disc-shaped smoke pipe (7) is connected to the flue gas connection pipe (9). The other end of the disc-shaped smoke pipe (7) extends to the outside of the second-stage preheating box (8) and is provided with a smoke exhaust pipe (6). A water guide pipe (10) is connected between the drain outlet of the second-stage preheating box (8) and the water inlet port of the heat exchange pipe (102).

2. The waste heat utilization device for flue gas and high-temperature internal circulating water of a gas generator set according to claim 1, characterized in that: The steam output mechanism (4) includes a disc pipe (401) fixedly connected to the inside of the primary preheating box (3), and the disc pipe (401) is provided with an array of through holes (402). A steam pipe (11) is connected to one side of the heat exchange box (101), and the end of the steam pipe (11) is connected to the disc pipe (401).

3. The waste heat utilization device for flue gas and high-temperature internal circulating water of a gas generator set according to claim 1, characterized in that: The heat exchange box (101) is connected to a water inlet pipe (104) at the water inlet interface.

4. The waste heat utilization device for flue gas and high-temperature internal circulating water of a gas generator set according to claim 1, characterized in that: The upper part of the primary preheating box (3) is connected to an air outlet pipe.

5. The waste heat utilization device for flue gas and high-temperature internal circulating water of a gas generator set according to claim 1, characterized in that: It also includes a heat preservation box (13), and a hot water pipe (14) is connected between the outlet port of the heat exchange pipe (102) and the inlet port of the heat preservation box (13), and a water outlet pipe (12) is connected to one side of the heat preservation box (13).

6. The waste heat utilization device for flue gas and high-temperature internal circulating water of a gas generator set according to claim 1, characterized in that: The inner walls of the heat exchange box (101), the primary preheating box (3) and the secondary preheating box (8) are all provided with a heat insulation layer.

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