Steam boiler waste heat recovery system

Abstract

The utility model discloses a steam boiler waste heat recovery system relates to steam boiler waste heat recovery technical field, this steam boiler waste heat recovery system, including mounting bracket, be provided with boiler body on the mounting bracket, be provided with outlet pipe and transmission pipe on the boiler body, the upper side surface fixed connection of boiler body has recovery cylinder, the end of transmission pipe and the inside of recovery cylinder are communicated, the outside of recovery cylinder is provided with inlet pipe, the upper end of recovery cylinder is provided with exhaust pipe, the inside of recovery cylinder is provided with heat transfer cylinder, the inner wall of recovery cylinder and the outer surface of heat transfer cylinder are fixedly connected with the baffle, the inlet pipe is located above the baffle, transmission pipe is located below the baffle, can through the inside of recovery cylinder to the flue gas guide, and through heat transfer subassembly utilizes the high temperature of flue gas and carries out preheating to water flow, reduces the time and energy consumption required when heating subsequently.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery technology for steam boilers, and particularly to a waste heat recovery system for steam boilers. Background Technology

[0002] A steam boiler is a device that uses fuel combustion or other energy sources to heat water and produce steam with specified parameters. It mainly consists of a "boiler" (steam and water piping system) and a "furnace" (combustion system). Heat is released through fuel combustion in the furnace and transferred to the water in the boiler via heating surfaces, causing it to vaporize into steam. Steam boilers are classified by application, such as power plant boilers and industrial boilers, and by pressure, such as low-pressure and high-pressure types. They are widely used in power generation, heating, and chemical industries. During operation, strict adherence to safety regulations is required to ensure stable pressure, water level, and other parameters, guaranteeing safe and efficient operation of the equipment.

[0003] Steam boilers generate flue gas during operation. This flue gas is at a high temperature, and directly discharging it results in a certain waste of internal heat resources. When heating water, the water is usually heated from room temperature, which is a low initial temperature and requires a long heating time. It is impossible to preheat the water using the heat from the flue gas, which has certain shortcomings. In view of this, we propose a steam boiler waste heat recovery system. Utility Model Content

[0004] The purpose of this invention is to provide a waste heat recovery system for steam boilers to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a steam boiler waste heat recovery system, including a mounting frame, a boiler body mounted on the mounting frame, a water outlet pipe and a transmission pipe mounted on the boiler body, a recovery cylinder fixedly connected to the upper surface of the boiler body, the end of the transmission pipe communicating with the interior of the recovery cylinder, a water inlet pipe mounted on the exterior of the recovery cylinder, an exhaust pipe mounted at the upper end of the recovery cylinder, a heat transfer cylinder mounted inside the recovery cylinder, a partition fixedly connected between the inner wall of the recovery cylinder and the outer surface of the heat transfer cylinder, the water inlet pipe located above the partition, the transmission pipe located below the partition, the upper side of the heat transfer cylinder communicating with the exhaust pipe, an air inlet pipe mounted on the lower surface of the heat transfer cylinder, and a heat transfer assembly mounted on the partition.

[0006] Preferably, the heat transfer assembly includes two guide plates, which are fixedly connected to the upper and lower surfaces of the partition, respectively, and both guide plates are spiral-shaped.

[0007] Preferably, the two guide plates are arranged in opposite directions, and a sealing plate is fixedly connected between the upper guide plate and the interior of the recycling cylinder.

[0008] Preferably, a through groove is formed on the upper surface of the partition, and a heat-conducting plate is fixedly connected to the outer surface of the heat transfer cylinder.

[0009] Preferably, the heat-conducting plate passes through the guide plate, and the interior of the heat transfer cylinder is provided with four sets of heat-conducting rings.

[0010] Preferably, the outer surface of the heat-conducting ring is in contact with the heat-conducting plate, and heat-conducting fins are fixedly connected to the upper and lower surfaces of the four sets of heat-conducting rings respectively.

[0011] Preferably, the inner diameter of the four sets of heat-conducting rings gradually decreases from bottom to top, and a detection component is provided on the outer surface of the recovery cylinder.

[0012] Preferably, a temperature sensor is fixedly connected to the detection component, and the temperature sensor penetrates into the interior of the recovery cylinder.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This steam boiler waste heat recovery system can guide flue gas into the interior of the recovery cylinder and use the high temperature of the flue gas to preheat the water flow through the heat transfer components, thereby reducing the time and energy consumption required for subsequent heating.

[0015] 2. This steam boiler waste heat recovery system utilizes multiple sets of heat-conducting plates to significantly increase the contact area between the heat-conducting components and the flue gas. At the same time, through the setting of temperature sensors, it is also possible to understand the heat transfer efficiency inside the recovery cylinder and adjust the power of the boiler itself according to the temperature, thereby achieving the purpose of energy saving. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0017] Figure 1 This is a schematic diagram of the waste heat recovery system for a steam boiler according to this utility model;

[0018] Figure 2 This is a cross-sectional schematic diagram of the recycling cylinder of this utility model;

[0019] Figure 3 This is a schematic diagram of the heat-conducting ring of this utility model;

[0020] Figure 4 This is a schematic diagram of the internal plan of the recycling cylinder of this utility model.

[0021] Reference numerals in the attached drawings: 1. Mounting bracket; 2. Boiler body; 3. Outlet pipe; 4. Transfer pipe; 5. Recovery cylinder; 6. Inlet pipe; 7. Exhaust pipe; 8. Heat transfer cylinder; 9. Baffle plate; 10. Air inlet pipe; 11. Guide plate; 12. Sealing plate; 13. Through groove; 14. Heat-conducting plate; 15. Heat-conducting ring; 16. Heat-conducting fins; 17. Detection component; 18. Temperature sensor. Detailed Implementation

[0022] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0023] Please see Figure 1-4 This utility model provides a technical solution: a steam boiler waste heat recovery system, including a mounting frame 1, a boiler body 2 mounted on the mounting frame 1, a water outlet pipe 3 and a transmission pipe 4 mounted on the boiler body 2, the transmission pipe 4 transmitting preheated water to the interior of the boiler body 2, a recovery cylinder 5 fixedly connected to the upper surface of the boiler body 2, the end of the transmission pipe 4 communicating with the interior of the recovery cylinder 5, a water inlet pipe 6 mounted on the exterior of the recovery cylinder 5, an exhaust pipe 7 mounted on the upper end of the recovery cylinder 5 to discharge flue gas, and a heat transfer cylinder 8 mounted inside the recovery cylinder 5. The heat from the flue gas is transferred to the water flow. A partition 9 is fixedly connected between the inner wall of the recovery cylinder 5 and the outer surface of the heat transfer cylinder 8. The water inlet pipe 6 is located above the partition 9. Water is first transported to the upper part of the partition 9 through the water inlet pipe 6. The transmission pipe 4 is located below the partition 9. The upper side of the heat transfer cylinder 8 is connected to the exhaust pipe 7. An air inlet pipe 10 is provided on the lower surface of the heat transfer cylinder 8. A heat transfer component is provided on the partition 9. The flue gas can be guided into the interior of the recovery cylinder 5, and the high temperature of the flue gas can be used to preheat the water flow through the heat transfer component, reducing the time and energy consumption required for subsequent heating.

[0024] Furthermore, the heat transfer assembly includes two guide plates 11, which are fixedly connected to the upper and lower surfaces of the partition 9, respectively. Both guide plates 11 are spiral-shaped and arranged in opposite directions. The two oppositely arranged guide plates 11 can significantly prolong the time that the water flows in the recovery cylinder 5, thereby improving the heating effect. A sealing plate 12 is fixedly connected between the upper guide plate 11 and the interior of the recovery cylinder 5. A through groove 13 is opened on the upper surface of the partition 9, allowing the water flow from the upper side to enter the lower side of the partition 9. When the water flow passes through the upper guide plate 11 and is guided to the through groove 13, the water flow enters the lower side of the partition 9 through the through groove 13, and is guided by the lower guide plate 11 to move in a spiral motion, and finally guides the water flow to the interior of the transmission pipe 4. The water flow is then transferred to the interior of the boiler body 2 through the transmission pipe 4, and discharged through the outlet pipe 3 after being heated. A heat-conducting... The heat transfer cylinder 8 is equipped with a heat transfer plate 14, which heats the water flow through direct contact with the heat transfer plate 11. The heat transfer plate 14 extends through the guide plate 11. Four sets of heat transfer rings 15 are installed inside the heat transfer cylinder 8. The outer surface of the heat transfer rings 15 contacts the heat transfer plate 14. Heat transfer fins 16 are fixedly connected to the upper and lower surfaces of the four sets of heat transfer rings 15. The heat transfer rings 15 and heat transfer fins 16 transfer the heat of the flue gas to the heat transfer plate 14, thus heating the water flow. The inner diameter of the four sets of heat transfer rings 15 gradually decreases from bottom to top. A detection component 17 is installed on the outer surface of the recovery cylinder 5, and a temperature sensor 18 is fixedly connected to the detection component 17. The temperature sensor 18 extends through the interior of the recovery cylinder 5. The use of multiple sets of heat transfer plates 14 significantly increases the contact area between the heat transfer components and the flue gas. Simultaneously, the temperature sensor 18 allows for monitoring the heat transfer efficiency inside the recovery cylinder 5 and adjusting the power of the boiler body 2 according to the temperature, achieving energy savings.

[0025] Working principle: When heating the water source, the water source is first transported to the top of the baffle 9 through the water inlet pipe 6, and guided by the spiral guide plate 11 to move in a spiral motion inside the recovery cylinder 5. During the movement of the water source, the flue gas generated by combustion enters the interior of the heat transfer cylinder 8 through the air inlet pipe 10. This flue gas comes into contact with the heat-conducting fins 16 and the heat-conducting ring 15, and transfers heat to the heat-conducting fins 16 and the heat-conducting ring 15. Subsequently, this heat is transferred to the heat-conducting plate 14 through the heat-conducting ring 15, and finally transferred to the water flow through the heat-conducting plate 14. When the water flows through the upper guide plate 11 to the through groove 13, the water flows through the through groove 13 into the lower side of the baffle 9, and is guided by the lower guide plate 11 to move in a spiral motion, and finally guides the water flow into the interior of the transmission pipe 4. The water flow is then transmitted to the interior of the boiler body 2 through the transmission pipe 4. After being heated, the water is discharged through the outlet pipe 3. At the same time, the temperature sensor 18 can detect the water temperature at the end of the transmission pipe 4, so as to understand the heat transfer efficiency inside the recovery cylinder 5 and adjust the power of the boiler body 2 itself according to the temperature, thereby achieving the purpose of energy saving.

[0026] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A steam boiler waste heat recovery system comprising a mounting frame (1), characterized in that: The mounting bracket (1) is provided with a boiler body (2), the boiler body (2) is provided with a water outlet pipe (3) and a transmission pipe (4), the upper surface of the boiler body (2) is fixedly connected with a recovery cylinder (5), the end of the transmission pipe (4) is connected to the inside of the recovery cylinder (5), the outside of the recovery cylinder (5) is provided with a water inlet pipe (6), the upper end of the recovery cylinder (5) is provided with an exhaust pipe (7), the inside of the recovery cylinder (5) is provided with a heat transfer cylinder (8), the inner wall of the recovery cylinder (5) and the outer surface of the heat transfer cylinder (8) are fixedly connected with a partition (9), the water inlet pipe (6) is located above the partition (9), the transmission pipe (4) is located below the partition (9), the upper side of the heat transfer cylinder (8) is connected to the exhaust pipe (7), the lower surface of the heat transfer cylinder (8) is provided with an air inlet pipe (10), and the partition (9) is provided with a heat transfer assembly.

2. The steam boiler waste heat recovery system according to claim 1, characterized in that: The heat transfer assembly includes two guide plates (11), which are fixedly connected to the upper and lower surfaces of the partition (9), and both guide plates (11) are spiral-shaped.

3. The steam boiler waste heat recovery system according to claim 2, characterized in that: The two guide plates (11) are arranged opposite to each other, and a sealing plate (12) is fixedly connected between the upper guide plate (11) and the inside of the recycling cylinder (5).

4. The steam boiler waste heat recovery system according to claim 2, characterized in that: The upper surface of the partition (9) is provided with a through groove (13), and the outer surface of the heat transfer cylinder (8) is fixedly connected with a heat-conducting plate (14).

5. The steam boiler waste heat recovery system according to claim 4, characterized in that: The heat-conducting plate (14) penetrates the guide plate (11), and the heat transfer cylinder (8) is provided with four sets of heat-conducting rings (15).

6. The steam boiler waste heat recovery system according to claim 5, characterized in that: The outer surface of the heat-conducting ring (15) is in contact with the heat-conducting plate (14), and heat-conducting fins (16) are fixedly connected to the upper and lower surfaces of the four sets of heat-conducting rings (15).

7. The steam boiler waste heat recovery system according to claim 6, characterized in that: The inner diameter of the four sets of heat-conducting rings (15) gradually decreases from bottom to top, and the outer surface of the recovery cylinder (5) is provided with a detection component (17).

8. The steam boiler waste heat recovery system according to claim 7, characterized in that: A temperature sensor (18) is fixedly connected to the detection component (17), and the temperature sensor (18) penetrates into the interior of the recovery cylinder (5).

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