Flue gas high-temperature waste heat utilization equipment

Abstract

The utility model provides flue gas high-temperature waste heat utilization equipment, and relates to the field of flue gas waste heat utilization equipment. Comprising a recovery tank, the top in the recovery tank is fixedly connected with a partition plate, the bottom of the partition plate is connected and communicated with a smoke pipeline, the smoke pipeline is spiral, the bottom of the smoke pipeline is open, a heat exchange pipe is arranged in the smoke pipeline, the shape of the heat exchange pipe is the same as that of the smoke pipeline, one end of the heat exchange pipe is connected with a water inlet pipe, and the other end of the heat exchange pipe is connected with a water outlet pipe. And the water outlet pipe extends downwards to the outer side of the recovery tank. The utility model solves the problems that the efficiency is low and only water can be supplied discontinuously when domestic or industrial water is heated by using flue gas waste heat in the prior art.

Description

Technical Field

[0001] The utility model provides a flue gas high-temperature waste heat utilization device, which relates to the field of flue gas waste heat utilization devices. Background Art

[0002] Flue gas generated during industrial production often contains a large amount of heat energy. If directly discharged, it will cause huge waste of energy. The utilization of flue gas waste heat can reduce energy consumption and environmental impact. Common waste heat utilization methods include waste heat boilers: heating steam or hot water through flue gas waste heat for heating needs in heating or industrial production processes; flue gas preheating: using the waste heat in flue gas to preheat the air or fuel entering the furnace to improve combustion efficiency and reduce fuel consumption; power generation: driving a generator to generate electricity using flue gas waste heat to improve energy utilization efficiency; air conditioning: using flue gas waste heat for heating or cooling in an air conditioning system to improve energy utilization efficiency; hot water supply: directly using flue gas waste heat to heat domestic hot water or industrial water to reduce energy consumption. The effective utilization of flue gas waste heat can not only save energy costs, but also help reduce greenhouse gas emissions, which is one of the important ways for industrial energy conservation and emission reduction.

[0003] In the prior art, when using flue gas waste heat to heat domestic or industrial water, a flue gas pipeline is usually arranged in a water tank, the flue gas is introduced into the pipeline, and heat exchange is carried out between the pipeline and water to heat the water in the water tank. In order to improve efficiency, the pipeline is also arranged in a spiral shape. However, the volume of the water tank is relatively large. Heating a large volume of water through the flue gas pipeline, the efficiency is still relatively low, and it takes a certain amount of time to make the water in the entire water tank reach a relatively high temperature, and the supply of hot water is intermittent. Therefore, we propose a flue gas high-temperature waste heat utilization device. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is the problem that the efficiency is relatively low and only intermittent water supply can be achieved when using flue gas waste heat to heat domestic or industrial water in the prior art.

[0005] To solve the above technical problem, the technical solution provided by the utility model is: a flue gas high-temperature waste heat utilization device, including a recovery tank, a partition is fixedly connected to the inner top of the recovery tank, a flue gas pipeline is connected and communicated at the bottom of the partition, the flue gas pipeline is spiral and the bottom is in an open state, a heat exchange pipe is arranged in the flue gas pipeline, the heat exchange pipe has the same shape as the flue gas pipeline, and one end of the heat exchange pipe is connected with a water inlet pipe and the other end is connected with a water outlet pipe, and the water outlet pipe extends downward to the outside of the recovery tank.

[0006] Preferably, the top of the recovery tank is a conical top and an air inlet pipe is arranged at the top of the conical top, and the water inlet pipe sequentially penetrates through the partition and the air inlet pipe upward.

[0007] Preferably, a connector is fixedly connected between the flue gas duct and the partition plate, and a deceleration plate is fixedly connected to the inner side of the connector. The deceleration plate is streamlined.

[0008] Preferably, a plurality of flue gas ducts are circumferentially arranged around the recovery tank, and both ends of the plurality of heat exchange tubes respectively penetrate through the flue gas ducts and converge at the water inlet pipe and the water outlet pipe.

[0009] Preferably, an exhaust pipe is connected to the bottom end of the recovery tank.

[0010] Preferably, anti-corrosion layers are coated on the outer surfaces of the flue gas duct and the heat exchange tubes.

[0011] Advantages of the present utility model:

[0012] The water flow is heated by the flue gas duct wrapping the heat exchange tubes. Since the amount of water flowing in the heat exchange tubes is small and the flue gas duct is wrapped outside the heat exchange tubes, rapid heating can be achieved, so that when the water flow flows out from the water outlet pipe, hot water can be obtained immediately, thus realizing the effect of continuously producing hot water. Description of the drawings

[0013] Figure 1 is a schematic diagram of the overall structure of a flue gas high-temperature waste heat utilization device of the present utility model.

[0014] Figure 2 is a sectional view of the recovery tank of a flue gas high-temperature waste heat utilization device of the present utility model.

[0015] Figure 3 is a schematic diagram of the flue gas duct structure of a flue gas high-temperature waste heat utilization device of the present utility model.

[0016] Figure 4 is a schematic diagram of the water inlet pipe, heat exchange tube, and water outlet pipe structure of a flue gas high-temperature waste heat utilization device of the present utility model.

[0017] Figure 5 is a schematic diagram of the connector structure of a flue gas high-temperature waste heat utilization device of the present utility model.

[0018] (1, recovery tank; 2, exhaust pipe; 3, water outlet pipe; 4, water inlet pipe; 5, intake pipe; 6, partition plate; 7, conical top; 8, flue gas duct; 9, connector; 10, heat exchange tube; 11, deceleration plate) Detailed implementation manners

[0019] Hereinafter, the preferred embodiments of the present utility model will be described in detail with reference to the drawings.

[0020] Refer to Figures 1 to 5, the present utility model provides a flue gas high-temperature waste heat utilization device, which includes a recovery tank 1. At the top inside the recovery tank 1, a partition plate 6 is fixedly connected. At the bottom of the partition plate 6, a flue gas pipe 8 is connected and communicated. The flue gas pipe 8 is spiral and has an open bottom. Inside the flue gas pipe 8, there is a heat exchange pipe 10. The heat exchange pipe 10 has the same shape as the flue gas pipe 8. One end of the heat exchange pipe 10 is connected to a water inlet pipe 4, and the other end is connected to a water outlet pipe 3. The water outlet pipe 3 extends downward to the outside of the recovery tank 1. Specifically, the heat exchange pipe 10 is connected to an external water source through the water inlet pipe 4. The water source flows inside the heat exchange pipe 10 and flows out from the water outlet pipe 3. The flue gas enters the flue gas pipe 8 and then enters the recovery tank 1 from the opening at the bottom. When the flue gas flows inside the flue gas pipe 8, heat exchange can occur between the flue gas and the heat exchange pipe 10 on the inner side, thereby heating the water source inside the heat exchange pipe 10. Since the amount of water flowing inside the heat exchange pipe 10 is small, and the flue gas pipe 8 is wrapped outside the heat exchange pipe 10, the water source inside the heat exchange pipe 10 can be heated quickly, so that when the water flows out from the water outlet pipe 3, hot water can be obtained immediately, thus realizing continuous production of hot water. The flue gas discharged from the flue gas pipe 8 still has residual heat. The flue gas fills the recovery tank 1 and can also play a role in heat preservation.

[0021] Further, the top of the recovery tank 1 is a conical top 7, and an air inlet pipe 5 is provided at the top of the conical top 7. The water inlet pipe 4 sequentially penetrates upward through the partition plate 6 and the air inlet pipe 5. Specifically, the conical top 7 is narrow at the top and wide at the bottom, which can slow down the flow rate of the flue gas. At this time, the water inlet pipe 4 has already contacted the flue gas and can play a preheating effect.

[0022] Further, a connector 9 is fixedly connected between the flue gas pipe 8 and the partition plate 6. Inside the connector 9, a deceleration plate 11 is fixedly connected. The deceleration plate 11 is streamlined. Specifically, the deceleration plate 11 further reduces the flow rate of the flue gas, reducing the flow rate of the flue gas in the flue gas pipe 8, so that the heat of the flue gas can be fully exchanged with the water in the heat exchange pipe 10, improving the utilization rate.

[0023] Further, a plurality of flue gas pipes 8 are circumferentially arranged around the recovery tank 1. Both ends of the plurality of heat exchange pipes 10 respectively penetrate through the flue gas pipes 8 and converge at the water inlet pipe 4 and the water outlet pipe 3. Specifically, by setting multiple groups of flue gas pipes 8, the amount of water heated at one time is increased.

[0024] Further, an exhaust pipe 2 is connected to the bottom end of the recovery tank 1. Specifically, the exhaust pipe 2 is used to discharge the flue gas that has completed heat exchange to the next process for filtration and emission.

[0025] Further, anti-corrosion layers are coated on the outer surfaces of both the flue gas pipe 8 and the heat exchange pipe 10. Specifically, the flue gas contains components with strong corrosiveness. Through the setting of the anti-corrosion layer, the service lives of the flue gas pipe 8 and the heat exchange pipe 10 are improved.

[0026] Working principle: The water inlet pipe 4 is connected to an external water source, and the air inlet pipe 5 is connected to the flue gas exhaust port. The flue gas enters the recovery tank 1 through the air inlet pipe 5. After being initially decelerated by the conical top 7, it enters the flue gas pipe 8 after secondary deceleration through the connector 9, and finally is discharged from the bottom opening of the flue gas pipe 8 to the inside of the recovery tank 1. The external water source enters the heat exchange pipe 10 through the water inlet pipe 4 and then is discharged through the water outlet pipe 3. When the water flows in the heat exchange pipe 10, it exchanges heat with the high-temperature flue gas in the flue gas pipe 8, thus being heated into hot water.

[0027] The above description has been made on the present utility model and its implementation manners. Such description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present utility model, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and design similar structural manners and embodiments without creative efforts without departing from the gist of the creation of the present utility model, they shall fall within the protection scope of the present utility model.

Claims

1. A flue gas high-temperature waste heat utilization device, comprising a recovery tank, characterized in that: A partition is fixedly connected to the top of the recovery tank, and the bottom of the partition is connected to a flue gas duct. The flue gas duct is spiral and has an open bottom. A heat exchange pipe is arranged in the flue gas duct. The heat exchange pipe has the same shape as the flue gas duct, and one end of the heat exchange pipe is connected to a water inlet pipe and the other end is connected to a water outlet pipe. The water outlet pipe extends downward to the outside of the recovery tank.

2. The flue gas high-temperature waste heat utilization device according to claim 1, characterized in that: The top of the recovery tank is a conical top and an air inlet pipe is arranged on the top of the conical top, and the water inlet pipe passes through the partition plate and the air inlet pipe upward in sequence.

3. The flue gas high-temperature waste heat utilization device according to claim 1, characterized in that: A connector is fixedly connected between the smoke duct and the partition plate, a deceleration plate is fixedly connected to the inner side of the connector, and the deceleration plate is streamlined.

4. The flue gas high-temperature waste heat utilization device according to claim 1, characterized in that: The flue gas pipes are arranged in a plurality around the recovery tank in the circumferential direction, and both ends of the plurality of heat exchange pipes respectively penetrate the flue gas pipes and are gathered at the water inlet pipe and the water outlet pipe.

5. The flue gas high-temperature waste heat utilization device according to claim 1, characterized in that: The bottom end of the recovery tank is connected with an exhaust pipe.

6. The flue gas high-temperature waste heat utilization device according to claim 1, characterized in that: The outer surfaces of the flue gas duct and the heat exchange tube are coated with an anti-corrosion layer.

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