A heat recovery combustion system

Abstract

The application relates to a heat recovery combustion system and relates to the technical field of heat recovery, and comprises the following steps: a recovery step of recovering heat generated by equipment; a heat exchange step of utilizing the recovered heat to perform heat exchange and heat air; and an air supply step of feeding the heated air into a combustion device. The application has the advantage that waste heat can be utilized.

Description

Technical Field

[0001] This application relates to the technical field of heat recovery, and in particular to a heat recovery combustion system. Background Technology

[0002] During the production process, equipment operation generates heat. After generating heat, it is necessary to cool the equipment to reduce the temperature. Existing cooling methods, such as liquid cooling or air cooling, often waste the heat after cooling, resulting in energy loss. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, one of the objectives of this application is to provide a heat recovery combustion system that has the advantage of being able to utilize waste heat.

[0004] The above-mentioned objective of this application is achieved through the following technical solution: A heat recovery combustion system includes the following steps: a recovery step, recovering heat generated by the equipment; a heat exchange step, using the recovered heat for heat exchange to heat air; and a gas supply step, introducing the heated air into the combustion equipment.

[0005] By adopting the above technical solution, the heat generated by the equipment is recovered during use (i.e., the equipment is cooled down), and the heat is transferred to the air through heat exchange. The hot air is then supplied to the combustion equipment, such as the combustion chamber of a combustion furnace, making the temperature inside the combustion chamber more stable.

[0006] In a preferred embodiment, this application may be further configured as follows: in the recovery step, a recovery pipe is used, which is filled with a cooling medium for recovering heat from the equipment; in the heat exchange step, a heat exchange cylinder and a fan are used, with the fan installed inside the heat exchange cylinder and the recovery pipe extending into the heat exchange cylinder, and the fan drawing gas from the heat exchange cylinder; in the gas supply step, a gas supply pipe is used, which is connected to the heat exchange cylinder, for delivering the gas drawn by the fan to the combustion equipment.

[0007] By adopting the above technical solution, namely by blowing the recovery pipe inside the heat exchange cylinder with a fan, the gas passing through the heat exchange cylinder will carry heat and enter the combustion equipment through the gas supply pipe.

[0008] In a preferred embodiment, this application can be further configured such that, when the cooling medium is gas, the heat exchange cylinder is sealed, one end of the recovery pipe is connected to the outside, and the other end is connected to the heat exchange cylinder.

[0009] By adopting the above technical solution, hot gas flow is directly supplied to the combustion equipment during use, thereby reducing heat loss.

[0010] In a preferred embodiment, this application can be further configured such that, when the cooling medium is liquid, the recovery pipe passes through the heat exchange cylinder, and the heat exchange cylinder is connected to the outside.

[0011] By adopting the above technical solution, heat exchange is achieved by allowing external gas to enter the heat exchange cylinder and cool the recovery tube.

[0012] In a preferred embodiment, this application may be further configured such that: a heat exchange box is provided inside the heat exchange cylinder, the heat exchange box is used to contain a cooling medium, the recovery pipe is used to transport gas, one end of the recovery pipe extends into the liquid in the heat exchange box, the other end is connected to the heat exchange box, and the heat exchange cylinder is connected to the outside.

[0013] By adopting the above technical solution, the presence of the heat exchange box can further enhance the heat exchange effect.

[0014] In a preferred embodiment, this application can be further configured such that: a heat exchange box is provided with a plurality of fins, the fins are staggered and extend to the outer surface of the heat exchange box, the plurality of staggered fins divide the heat exchange box into S-shaped flow channels, one end of the recovery pipe is located at the beginning of the S-shaped flow channel and the other end is located at the end of the S-shaped flow channel.

[0015] By adopting the above technical solution and using staggered fins, the heat exchange area of ​​the gas is increased, thereby achieving a better heat exchange effect.

[0016] In a preferred embodiment, this application may be further configured such that the fins in contact with the liquid have through holes for allowing the liquid to flow.

[0017] By adopting the above technical solution, the fins are provided with through holes, and the cooling medium in the chambers separated by the fins can circulate with each other to exchange heat. Attached Figure Description

[0018] Figure 1 This is a cross-sectional structural diagram of the heat exchanger box in this application.

[0019] Reference numerals: 1. Heat exchange box; 2. Recovery pipe; 3. Fin; 31. Through hole. Detailed Implementation

[0020] The present application will be further described in detail below with reference to the accompanying drawings.

[0021] Reference Figure 1 The present application discloses a heat recovery combustion system, which includes the following steps: The recycling step recovers the heat generated by the equipment; Heat exchange steps: Heat the air by using the recovered heat for heat exchange; Gas supply procedure: Introduce heated air into the combustion equipment.

[0022] The heat generated by the equipment is recovered in the recovery step, which is the step of cooling the equipment (such as centrifugal compressors or other equipment that generates heat during operation), such as existing methods of liquid cooling or air cooling.

[0023] In the recovery step, a recovery pipe 2 is used, which is connected to the original cooling pipe of the equipment. The recovery pipe 2 is filled with a cooling medium to recover the heat of the equipment. In the heat exchange step, a heat exchange cylinder and a fan are used. The fan is installed inside the heat exchange cylinder, and the recovery pipe 2 extends into the heat exchange cylinder. The fan draws gas from the heat exchange cylinder. In the gas supply step, a gas supply pipe is used, which is connected to the heat exchange cylinder to deliver the gas drawn by the fan to the combustion equipment.

[0024] In Example 1, when the cooling medium is gas, the heat exchange cylinder is sealed, one end of the recovery pipe 2 is connected to the outside, and the other end is connected to the heat exchange cylinder.

[0025] In Example 2, when the cooling medium is liquid, the recovery pipe 2 passes through the heat exchange cylinder, and the heat exchange cylinder is connected to the outside.

[0026] In Example 3, when the gas to be heated is a gas with a high oxygen content, a heat exchange box 1 is provided inside the heat exchange cylinder. The heat exchange box 1 can be connected to the outside (such as a high oxygen content gas source) through a pipeline. The heat exchange box 1 is used to contain the cooling medium, and the recovery pipe 2 is used to transport the gas. One end of the recovery pipe 2 extends into the liquid in the heat exchange box 1, and the other end is connected to the heat exchange box 1. The heat exchange cylinder is connected to the outside. The heat exchange box 1 is provided with multiple fins 3, which are staggered and extend to the outer surface of the heat exchange box 1. The multiple staggered fins 3 divide the heat exchange box 1 into S-shaped flow channels. One end of the recovery pipe 2 is located at the beginning of the S-shaped flow channel, and the other end is located at the end of the S-shaped flow channel. The fins 3 in contact with the liquid are provided with through holes 31 for liquid flow.

[0027] See Figure 1 In embodiment three, when the cooling medium in the recovery pipe 2 is gas, the recovery pipe 2 is equipped with a device (such as a fan or pump) that can generate compressed air to increase the gas pressure. The recovery pipe 2, the original air-cooled pipeline of the equipment, and the heat exchange box 1 form a closed cooling channel. The cooling medium in the heat exchange box 1 can be water. For ease of description, the multiple fins 3 in the heat exchange box 1 are divided into upper fins 3 and lower fins 3. The upper fins 3 and lower fins 3 are staggered. The lower fins 3 are provided with a through hole 31 near the connection with the heat exchange box 1.

[0028] Furthermore, at least one of the upper fins 3 extends into the cooling medium inside the heat exchange box 1, such as extending 5mm into the liquid. Figure 1The dotted line in the middle represents the water level in heat exchanger 1. The operator can set the insertion depth according to actual needs. In this embodiment, an aeration disc or a one-way valve that unidirectionally flows into the heat exchanger 1 can be installed at the end of the recovery pipe 2 that extends into the liquid in heat exchanger 1.

[0029] When the medium is gas, since at least one fin 3 in the upper group of fins 3 extends into the liquid, a gas flow channel is formed between the upper and lower groups of fins 3 under pressure during normal circulation, allowing gas to pass through. When the pressure is insufficient or stops (such as when the compressed air fan stops), the gas will flow, thus facilitating the mixing of the liquid in the heat exchanger 1. That is, by intermittently reducing the power of the compressed air generating device on the recovery pipe 2, the mixing of the liquid in the heat exchanger 1 can be achieved.

[0030] In Embodiment 3, when the cooling medium in the recovery pipe 2 is liquid, the recovery pipe 2 is equipped with a circulation pump (or the original equipment's circulation pump for cooling is used). The recovery pipe 2, the original liquid cooling pipeline of the equipment, and the heat exchange box 1 form a closed cooling channel. The heat exchange box 1 is filled with cooling medium, and the cooling medium is the same as the original cooling medium of the equipment (equipment that needs to dissipate heat), such as water. For ease of description, the multiple fins 3 in the heat exchange box 1 are divided into upper fins 3 and lower fins 3. The upper fins 3 and lower fins 3 are arranged alternately. The lower fins 3 are provided with a through hole 31 near the connection with the heat exchange box 1.

[0031] That is, the fin 3 in this application that is in contact with the liquid is provided with a through hole 31, which usually refers to the lower fin 3.

[0032] The implementation principle of this embodiment is as follows: during use, the heat from cooling the equipment is exchanged, so that the heat is transferred to the gas, and the heated gas is delivered to the combustion equipment, thereby enabling the utilization of waste heat.

[0033] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A heat recovery combustion system, characterized in that: It includes the following steps: a recovery step, which recovers the heat generated by the equipment; a heat exchange step, which uses the recovered heat to heat the air; and a gas supply step, which introduces the heated air into the combustion equipment.

2. The heat recovery combustion system according to claim 1, characterized in that: In the recovery step, a recovery pipe (2) is used, which is filled with a cooling medium to recover the heat of the equipment. In the heat exchange step, a heat exchange cylinder and a fan are used. The fan is installed inside the heat exchange cylinder, and the recovery pipe (2) extends into the heat exchange cylinder. The fan draws out the gas inside the heat exchange cylinder. In the gas supply step, a gas supply pipe is used, which is connected to the heat exchange cylinder to transport the gas drawn out by the fan to the combustion equipment.

3. The heat recovery combustion system according to claim 2, characterized in that: When the cooling medium is gas, the heat exchange cylinder is sealed, and one end of the recovery pipe (2) is connected to the outside, while the other end is connected to the heat exchange cylinder.

4. The heat recovery combustion system according to claim 2, characterized in that: When the cooling medium is liquid, the recovery pipe (2) passes through the heat exchange cylinder, and the heat exchange cylinder is connected to the outside.

5. The heat recovery combustion system according to claim 2, characterized in that: The heat exchange cylinder is equipped with a heat exchange box (1), which is used to contain the cooling medium. The recovery pipe (2) is used to transport gas. One end of the recovery pipe (2) extends into the liquid in the heat exchange box (1), and the other end is connected to the heat exchange box (1). The heat exchange cylinder is connected to the outside.

6. The heat recovery combustion system according to claim 5, characterized in that: The heat exchange box (1) is provided with multiple fins (3), which are staggered and extend to the outer surface of the heat exchange box (1). The multiple staggered fins (3) divide the heat exchange box (1) into S-shaped channels. One end of the recovery pipe (2) is located at the beginning of the S-shaped channel, and the other end is located at the end of the S-shaped channel.

7. The heat recovery combustion system according to claim 6, characterized in that: The fins (3) in contact with the liquid are provided with through holes (31) for allowing the liquid to flow.

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